Bug 1381689 - Upgrade to CodeMirror 5.27.4. r=bgrins draft
authorGabriel Luong <gabriel.luong@gmail.com>
Tue, 18 Jul 2017 20:32:30 -0400
changeset 610939 0552fa4db0eb898da79524f1830149a99e433a7f
parent 610910 d29d22da431dafbec526decd547d9a8dd7bf6dd0
child 638013 9dd69c874ffcf766fa84a1cf0a40862b0bc5761c
push id69061
push userbmo:gl@mozilla.com
push dateWed, 19 Jul 2017 00:32:46 +0000
reviewersbgrins
bugs1381689
milestone56.0a1
Bug 1381689 - Upgrade to CodeMirror 5.27.4. r=bgrins MozReview-Commit-ID: 1ZRwk6aYJ7m
devtools/client/sourceeditor/codemirror/README
devtools/client/sourceeditor/codemirror/addon/comment/comment.js
devtools/client/sourceeditor/codemirror/addon/edit/closebrackets.js
devtools/client/sourceeditor/codemirror/addon/edit/continuelist.js
devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js
devtools/client/sourceeditor/codemirror/addon/fold/indent-fold.js
devtools/client/sourceeditor/codemirror/addon/fold/xml-fold.js
devtools/client/sourceeditor/codemirror/addon/hint/show-hint.js
devtools/client/sourceeditor/codemirror/addon/search/match-highlighter.js
devtools/client/sourceeditor/codemirror/addon/search/search.js
devtools/client/sourceeditor/codemirror/addon/search/searchcursor.js
devtools/client/sourceeditor/codemirror/addon/selection/active-line.js
devtools/client/sourceeditor/codemirror/addon/selection/mark-selection.js
devtools/client/sourceeditor/codemirror/codemirror.bundle.js
devtools/client/sourceeditor/codemirror/keymap/emacs.js
devtools/client/sourceeditor/codemirror/keymap/sublime.js
devtools/client/sourceeditor/codemirror/keymap/vim.js
devtools/client/sourceeditor/codemirror/lib/codemirror.css
devtools/client/sourceeditor/codemirror/lib/codemirror.js
devtools/client/sourceeditor/codemirror/mode/clike/clike.js
devtools/client/sourceeditor/codemirror/mode/css/css.js
devtools/client/sourceeditor/codemirror/mode/elm/elm.js
devtools/client/sourceeditor/codemirror/mode/htmlmixed/htmlmixed.js
devtools/client/sourceeditor/codemirror/mode/javascript/javascript.js
devtools/client/sourceeditor/test/codemirror/comment_test.js
devtools/client/sourceeditor/test/codemirror/doc_test.js
devtools/client/sourceeditor/test/codemirror/driver.js
devtools/client/sourceeditor/test/codemirror/emacs_test.js
devtools/client/sourceeditor/test/codemirror/mode/javascript/test.js
devtools/client/sourceeditor/test/codemirror/mode_test.js
devtools/client/sourceeditor/test/codemirror/multi_test.js
devtools/client/sourceeditor/test/codemirror/search_test.js
devtools/client/sourceeditor/test/codemirror/sublime_test.js
devtools/client/sourceeditor/test/codemirror/test.js
devtools/client/sourceeditor/test/codemirror/vim_test.js
--- a/devtools/client/sourceeditor/codemirror/README
+++ b/devtools/client/sourceeditor/codemirror/README
@@ -5,17 +5,17 @@ code, and optionally help with indentati
 
 # Upgrade
 
 Currently used version is 5.16.0. To upgrade: download a new version of
 CodeMirror from the project's page [1] and replace all JavaScript and
 CSS files inside the codemirror directory [2].
 
 Then to recreate codemirror.bundle.js:
- > cd devtools/client
+ > cd devtools/client/sourceeditor
  > npm install
  > webpack
 
 To confirm the functionality run mochitests for the following components:
 
  * sourceeditor
  * scratchpad
  * debugger
--- a/devtools/client/sourceeditor/codemirror/addon/comment/comment.js
+++ b/devtools/client/sourceeditor/codemirror/addon/comment/comment.js
@@ -41,22 +41,27 @@
       } else {
         cm.lineComment(from, to, options);
       }
     }
   });
 
   // Rough heuristic to try and detect lines that are part of multi-line string
   function probablyInsideString(cm, pos, line) {
-    return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"`]/.test(line)
+    return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"\`]/.test(line)
+  }
+
+  function getMode(cm, pos) {
+    var mode = cm.getMode()
+    return mode.useInnerComments === false || !mode.innerMode ? mode : cm.getModeAt(pos)
   }
 
   CodeMirror.defineExtension("lineComment", function(from, to, options) {
     if (!options) options = noOptions;
-    var self = this, mode = self.getModeAt(from);
+    var self = this, mode = getMode(self, from);
     var firstLine = self.getLine(from.line);
     if (firstLine == null || probablyInsideString(self, from, firstLine)) return;
 
     var commentString = options.lineComment || mode.lineComment;
     if (!commentString) {
       if (options.blockCommentStart || mode.blockCommentStart) {
         options.fullLines = true;
         self.blockComment(from, to, options);
@@ -90,24 +95,25 @@
             self.replaceRange(commentString + pad, Pos(i, 0));
         }
       }
     });
   });
 
   CodeMirror.defineExtension("blockComment", function(from, to, options) {
     if (!options) options = noOptions;
-    var self = this, mode = self.getModeAt(from);
+    var self = this, mode = getMode(self, from);
     var startString = options.blockCommentStart || mode.blockCommentStart;
     var endString = options.blockCommentEnd || mode.blockCommentEnd;
     if (!startString || !endString) {
       if ((options.lineComment || mode.lineComment) && options.fullLines != false)
         self.lineComment(from, to, options);
       return;
     }
+    if (/\bcomment\b/.test(self.getTokenTypeAt(Pos(from.line, 0)))) return
 
     var end = Math.min(to.line, self.lastLine());
     if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end;
 
     var pad = options.padding == null ? " " : options.padding;
     if (from.line > end) return;
 
     self.operation(function() {
@@ -123,29 +129,29 @@
         self.replaceRange(endString, to);
         self.replaceRange(startString, from);
       }
     });
   });
 
   CodeMirror.defineExtension("uncomment", function(from, to, options) {
     if (!options) options = noOptions;
-    var self = this, mode = self.getModeAt(from);
+    var self = this, mode = getMode(self, from);
     var end = Math.min(to.ch != 0 || to.line == from.line ? to.line : to.line - 1, self.lastLine()), start = Math.min(from.line, end);
 
     // Try finding line comments
     var lineString = options.lineComment || mode.lineComment, lines = [];
     var pad = options.padding == null ? " " : options.padding, didSomething;
     lineComment: {
       if (!lineString) break lineComment;
       for (var i = start; i <= end; ++i) {
         var line = self.getLine(i);
         var found = line.indexOf(lineString);
         if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1;
-        if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment;
+        if (found == -1 && nonWS.test(line)) break lineComment;
         if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment;
         lines.push(line);
       }
       self.operation(function() {
         for (var i = start; i <= end; ++i) {
           var line = lines[i - start];
           var pos = line.indexOf(lineString), endPos = pos + lineString.length;
           if (pos < 0) continue;
@@ -157,25 +163,29 @@
       if (didSomething) return true;
     }
 
     // Try block comments
     var startString = options.blockCommentStart || mode.blockCommentStart;
     var endString = options.blockCommentEnd || mode.blockCommentEnd;
     if (!startString || !endString) return false;
     var lead = options.blockCommentLead || mode.blockCommentLead;
-    var startLine = self.getLine(start), endLine = end == start ? startLine : self.getLine(end);
-    var open = startLine.indexOf(startString), close = endLine.lastIndexOf(endString);
+    var startLine = self.getLine(start), open = startLine.indexOf(startString)
+    if (open == -1) return false
+    var endLine = end == start ? startLine : self.getLine(end)
+    var close = endLine.indexOf(endString, end == start ? open + startString.length : 0);
     if (close == -1 && start != end) {
       endLine = self.getLine(--end);
-      close = endLine.lastIndexOf(endString);
+      close = endLine.indexOf(endString);
     }
-    if (open == -1 || close == -1 ||
-        !/comment/.test(self.getTokenTypeAt(Pos(start, open + 1))) ||
-        !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1))))
+    var insideStart = Pos(start, open + 1), insideEnd = Pos(end, close + 1)
+    if (close == -1 ||
+        !/comment/.test(self.getTokenTypeAt(insideStart)) ||
+        !/comment/.test(self.getTokenTypeAt(insideEnd)) ||
+        self.getRange(insideStart, insideEnd, "\n").indexOf(endString) > -1)
       return false;
 
     // Avoid killing block comments completely outside the selection.
     // Positions of the last startString before the start of the selection, and the first endString after it.
     var lastStart = startLine.lastIndexOf(startString, from.ch);
     var firstEnd = lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
     if (lastStart != -1 && firstEnd != -1 && firstEnd + endString.length != from.ch) return false;
     // Positions of the first endString after the end of the selection, and the last startString before it.
--- a/devtools/client/sourceeditor/codemirror/addon/edit/closebrackets.js
+++ b/devtools/client/sourceeditor/codemirror/addon/edit/closebrackets.js
@@ -40,17 +40,17 @@
     keyMap["'" + bind.charAt(i) + "'"] = handler(bind.charAt(i));
 
   function handler(ch) {
     return function(cm) { return handleChar(cm, ch); };
   }
 
   function getConfig(cm) {
     var deflt = cm.state.closeBrackets;
-    if (!deflt) return null;
+    if (!deflt || deflt.override) return deflt;
     var mode = cm.getModeAt(cm.getCursor());
     return mode.closeBrackets || deflt;
   }
 
   function handleBackspace(cm) {
     var conf = getConfig(cm);
     if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
 
@@ -111,17 +111,19 @@
 
     var type;
     for (var i = 0; i < ranges.length; i++) {
       var range = ranges[i], cur = range.head, curType;
       var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
       if (opening && !range.empty()) {
         curType = "surround";
       } else if ((identical || !opening) && next == ch) {
-        if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
+        if (identical && stringStartsAfter(cm, cur))
+          curType = "both";
+        else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
           curType = "skipThree";
         else
           curType = "skip";
       } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
                  cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch &&
                  (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != ch)) {
         curType = "addFour";
       } else if (identical) {
@@ -178,18 +180,23 @@
   }
 
   // Project the token type that will exists after the given char is
   // typed, and use it to determine whether it would cause the start
   // of a string token.
   function enteringString(cm, pos, ch) {
     var line = cm.getLine(pos.line);
     var token = cm.getTokenAt(pos);
-    if (/\bstring2?\b/.test(token.type)) return false;
+    if (/\bstring2?\b/.test(token.type) || stringStartsAfter(cm, pos)) return false;
     var stream = new CodeMirror.StringStream(line.slice(0, pos.ch) + ch + line.slice(pos.ch), 4);
     stream.pos = stream.start = token.start;
     for (;;) {
       var type1 = cm.getMode().token(stream, token.state);
       if (stream.pos >= pos.ch + 1) return /\bstring2?\b/.test(type1);
       stream.start = stream.pos;
     }
   }
+
+  function stringStartsAfter(cm, pos) {
+    var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
+    return /\bstring/.test(token.type) && token.start == pos.ch
+  }
 });
--- a/devtools/client/sourceeditor/codemirror/addon/edit/continuelist.js
+++ b/devtools/client/sourceeditor/codemirror/addon/edit/continuelist.js
@@ -6,18 +6,18 @@
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   "use strict";
 
-  var listRE = /^(\s*)(>[> ]*|[*+-]\s|(\d+)([.)]))(\s*)/,
-      emptyListRE = /^(\s*)(>[> ]*|[*+-]|(\d+)[.)])(\s*)$/,
+  var listRE = /^(\s*)(>[> ]*|[*+-] \[[x ]\]\s|[*+-]\s|(\d+)([.)]))(\s*)/,
+      emptyListRE = /^(\s*)(>[> ]*|[*+-] \[[x ]\]|[*+-]|(\d+)[.)])(\s*)$/,
       unorderedListRE = /[*+-]\s/;
 
   CodeMirror.commands.newlineAndIndentContinueMarkdownList = function(cm) {
     if (cm.getOption("disableInput")) return CodeMirror.Pass;
     var ranges = cm.listSelections(), replacements = [];
     for (var i = 0; i < ranges.length; i++) {
       var pos = ranges[i].head;
       var eolState = cm.getStateAfter(pos.line);
@@ -25,26 +25,26 @@
       var inQuote = eolState.quote !== 0;
 
       var line = cm.getLine(pos.line), match = listRE.exec(line);
       if (!ranges[i].empty() || (!inList && !inQuote) || !match) {
         cm.execCommand("newlineAndIndent");
         return;
       }
       if (emptyListRE.test(line)) {
-        cm.replaceRange("", {
+        if (!/>\s*$/.test(line)) cm.replaceRange("", {
           line: pos.line, ch: 0
         }, {
           line: pos.line, ch: pos.ch + 1
         });
         replacements[i] = "\n";
       } else {
         var indent = match[1], after = match[5];
         var bullet = unorderedListRE.test(match[2]) || match[2].indexOf(">") >= 0
-          ? match[2]
+          ? match[2].replace("x", " ")
           : (parseInt(match[3], 10) + 1) + match[4];
 
         replacements[i] = "\n" + indent + bullet + after;
       }
     }
 
     cm.replaceSelections(replacements);
   };
--- a/devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js
+++ b/devtools/client/sourceeditor/codemirror/addon/edit/matchbrackets.js
@@ -11,22 +11,31 @@
 })(function(CodeMirror) {
   var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
     (document.documentMode == null || document.documentMode < 8);
 
   var Pos = CodeMirror.Pos;
 
   var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
 
-  function findMatchingBracket(cm, where, strict, config) {
+  function findMatchingBracket(cm, where, config) {
     var line = cm.getLineHandle(where.line), pos = where.ch - 1;
-    var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
+    var afterCursor = config && config.afterCursor
+    if (afterCursor == null)
+      afterCursor = /(^| )cm-fat-cursor($| )/.test(cm.getWrapperElement().className)
+
+    // A cursor is defined as between two characters, but in in vim command mode
+    // (i.e. not insert mode), the cursor is visually represented as a
+    // highlighted box on top of the 2nd character. Otherwise, we allow matches
+    // from before or after the cursor.
+    var match = (!afterCursor && pos >= 0 && matching[line.text.charAt(pos)]) ||
+        matching[line.text.charAt(++pos)];
     if (!match) return null;
     var dir = match.charAt(1) == ">" ? 1 : -1;
-    if (strict && (dir > 0) != (pos == where.ch)) return null;
+    if (config && config.strict && (dir > 0) != (pos == where.ch)) return null;
     var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));
 
     var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config);
     if (found == null) return null;
     return {from: Pos(where.line, pos), to: found && found.pos,
             match: found && found.ch == match.charAt(0), forward: dir > 0};
   }
 
@@ -64,17 +73,17 @@
     return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null;
   }
 
   function matchBrackets(cm, autoclear, config) {
     // Disable brace matching in long lines, since it'll cause hugely slow updates
     var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
     var marks = [], ranges = cm.listSelections();
     for (var i = 0; i < ranges.length; i++) {
-      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config);
+      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, config);
       if (match && cm.getLine(match.from.line).length <= maxHighlightLen) {
         var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
         marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));
         if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen)
           marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));
       }
     }
 
@@ -97,24 +106,35 @@
   function doMatchBrackets(cm) {
     cm.operation(function() {
       if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
       currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);
     });
   }
 
   CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
-    if (old && old != CodeMirror.Init)
+    if (old && old != CodeMirror.Init) {
       cm.off("cursorActivity", doMatchBrackets);
+      if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
+    }
     if (val) {
       cm.state.matchBrackets = typeof val == "object" ? val : {};
       cm.on("cursorActivity", doMatchBrackets);
     }
   });
 
   CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
-  CodeMirror.defineExtension("findMatchingBracket", function(pos, strict, config){
-    return findMatchingBracket(this, pos, strict, config);
+  CodeMirror.defineExtension("findMatchingBracket", function(pos, config, oldConfig){
+    // Backwards-compatibility kludge
+    if (oldConfig || typeof config == "boolean") {
+      if (!oldConfig) {
+        config = config ? {strict: true} : null
+      } else {
+        oldConfig.strict = config
+        config = oldConfig
+      }
+    }
+    return findMatchingBracket(this, pos, config)
   });
   CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){
     return scanForBracket(this, pos, dir, style, config);
   });
 });
--- a/devtools/client/sourceeditor/codemirror/addon/fold/indent-fold.js
+++ b/devtools/client/sourceeditor/codemirror/addon/fold/indent-fold.js
@@ -6,39 +6,43 @@
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
 "use strict";
 
+function lineIndent(cm, lineNo) {
+  var text = cm.getLine(lineNo)
+  var spaceTo = text.search(/\S/)
+  if (spaceTo == -1 || /\bcomment\b/.test(cm.getTokenTypeAt(CodeMirror.Pos(lineNo, spaceTo + 1))))
+    return -1
+  return CodeMirror.countColumn(text, null, cm.getOption("tabSize"))
+}
+
 CodeMirror.registerHelper("fold", "indent", function(cm, start) {
-  var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line);
-  if (!/\S/.test(firstLine)) return;
-  var getIndent = function(line) {
-    return CodeMirror.countColumn(line, null, tabSize);
-  };
-  var myIndent = getIndent(firstLine);
-  var lastLineInFold = null;
+  var myIndent = lineIndent(cm, start.line)
+  if (myIndent < 0) return
+  var lastLineInFold = null
+
   // Go through lines until we find a line that definitely doesn't belong in
   // the block we're folding, or to the end.
   for (var i = start.line + 1, end = cm.lastLine(); i <= end; ++i) {
-    var curLine = cm.getLine(i);
-    var curIndent = getIndent(curLine);
-    if (curIndent > myIndent) {
+    var indent = lineIndent(cm, i)
+    if (indent == -1) {
+    } else if (indent > myIndent) {
       // Lines with a greater indent are considered part of the block.
       lastLineInFold = i;
-    } else if (!/\S/.test(curLine)) {
-      // Empty lines might be breaks within the block we're trying to fold.
     } else {
-      // A non-empty line at an indent equal to or less than ours marks the
-      // start of another block.
+      // If this line has non-space, non-comment content, and is
+      // indented less or equal to the start line, it is the start of
+      // another block.
       break;
     }
   }
   if (lastLineInFold) return {
-    from: CodeMirror.Pos(start.line, firstLine.length),
+    from: CodeMirror.Pos(start.line, cm.getLine(start.line).length),
     to: CodeMirror.Pos(lastLineInFold, cm.getLine(lastLineInFold).length)
   };
 });
 
 });
--- a/devtools/client/sourceeditor/codemirror/addon/fold/xml-fold.js
+++ b/devtools/client/sourceeditor/codemirror/addon/fold/xml-fold.js
@@ -16,18 +16,18 @@
 
   var nameStartChar = "A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
   var nameChar = nameStartChar + "\-\:\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
   var xmlTagStart = new RegExp("<(/?)([" + nameStartChar + "][" + nameChar + "]*)", "g");
 
   function Iter(cm, line, ch, range) {
     this.line = line; this.ch = ch;
     this.cm = cm; this.text = cm.getLine(line);
-    this.min = range ? range.from : cm.firstLine();
-    this.max = range ? range.to - 1 : cm.lastLine();
+    this.min = range ? Math.max(range.from, cm.firstLine()) : cm.firstLine();
+    this.max = range ? Math.min(range.to - 1, cm.lastLine()) : cm.lastLine();
   }
 
   function tagAt(iter, ch) {
     var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
     return type && /\btag\b/.test(type);
   }
 
   function nextLine(iter) {
@@ -158,20 +158,20 @@
     if (start[1]) { // closing tag
       return {open: findMatchingOpen(iter, start[2]), close: here, at: "close"};
     } else { // opening tag
       iter = new Iter(cm, to.line, to.ch, range);
       return {open: here, close: findMatchingClose(iter, start[2]), at: "open"};
     }
   };
 
-  CodeMirror.findEnclosingTag = function(cm, pos, range) {
+  CodeMirror.findEnclosingTag = function(cm, pos, range, tag) {
     var iter = new Iter(cm, pos.line, pos.ch, range);
     for (;;) {
-      var open = findMatchingOpen(iter);
+      var open = findMatchingOpen(iter, tag);
       if (!open) break;
       var forward = new Iter(cm, pos.line, pos.ch, range);
       var close = findMatchingClose(forward, open.tag);
       if (close) return {open: open, close: close};
     }
   };
 
   // Used by addon/edit/closetag.js
--- a/devtools/client/sourceeditor/codemirror/addon/hint/show-hint.js
+++ b/devtools/client/sourceeditor/codemirror/addon/hint/show-hint.js
@@ -225,16 +225,18 @@
     hints.style.left = left + "px";
     hints.style.top = top + "px";
     // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.
     var winW = window.innerWidth || Math.max(document.body.offsetWidth, document.documentElement.offsetWidth);
     var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight);
     (completion.options.container || document.body).appendChild(hints);
     var box = hints.getBoundingClientRect(), overlapY = box.bottom - winH;
     var scrolls = hints.scrollHeight > hints.clientHeight + 1
+    var startScroll = cm.getScrollInfo();
+
     if (overlapY > 0) {
       var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top);
       if (curTop - height > 0) { // Fits above cursor
         hints.style.top = (top = pos.top - height) + "px";
         below = false;
       } else if (height > winH) {
         hints.style.height = (winH - 5) + "px";
         hints.style.top = (top = pos.bottom - box.top) + "px";
@@ -268,17 +270,16 @@
     }));
 
     if (completion.options.closeOnUnfocus) {
       var closingOnBlur;
       cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); });
       cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });
     }
 
-    var startScroll = cm.getScrollInfo();
     cm.on("scroll", this.onScroll = function() {
       var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();
       var newTop = top + startScroll.top - curScroll.top;
       var point = newTop - (window.pageYOffset || (document.documentElement || document.body).scrollTop);
       if (!below) point += hints.offsetHeight;
       if (point <= editor.top || point >= editor.bottom) return completion.close();
       hints.style.top = newTop + "px";
       hints.style.left = (left + startScroll.left - curScroll.left) + "px";
--- a/devtools/client/sourceeditor/codemirror/addon/search/match-highlighter.js
+++ b/devtools/client/sourceeditor/codemirror/addon/search/match-highlighter.js
@@ -40,44 +40,63 @@
   }
 
   function State(options) {
     this.options = {}
     for (var name in defaults)
       this.options[name] = (options && options.hasOwnProperty(name) ? options : defaults)[name]
     this.overlay = this.timeout = null;
     this.matchesonscroll = null;
+    this.active = false;
   }
 
   CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
     if (old && old != CodeMirror.Init) {
       removeOverlay(cm);
       clearTimeout(cm.state.matchHighlighter.timeout);
       cm.state.matchHighlighter = null;
       cm.off("cursorActivity", cursorActivity);
+      cm.off("focus", onFocus)
     }
     if (val) {
-      cm.state.matchHighlighter = new State(val);
-      highlightMatches(cm);
+      var state = cm.state.matchHighlighter = new State(val);
+      if (cm.hasFocus()) {
+        state.active = true
+        highlightMatches(cm)
+      } else {
+        cm.on("focus", onFocus)
+      }
       cm.on("cursorActivity", cursorActivity);
     }
   });
 
   function cursorActivity(cm) {
     var state = cm.state.matchHighlighter;
+    if (state.active || cm.hasFocus()) scheduleHighlight(cm, state)
+  }
+
+  function onFocus(cm) {
+    var state = cm.state.matchHighlighter
+    if (!state.active) {
+      state.active = true
+      scheduleHighlight(cm, state)
+    }
+  }
+
+  function scheduleHighlight(cm, state) {
     clearTimeout(state.timeout);
     state.timeout = setTimeout(function() {highlightMatches(cm);}, state.options.delay);
   }
 
   function addOverlay(cm, query, hasBoundary, style) {
     var state = cm.state.matchHighlighter;
     cm.addOverlay(state.overlay = makeOverlay(query, hasBoundary, style));
     if (state.options.annotateScrollbar && cm.showMatchesOnScrollbar) {
       var searchFor = hasBoundary ? new RegExp("\\b" + query + "\\b") : query;
-      state.matchesonscroll = cm.showMatchesOnScrollbar(searchFor, true,
+      state.matchesonscroll = cm.showMatchesOnScrollbar(searchFor, false,
         {className: "CodeMirror-selection-highlight-scrollbar"});
     }
   }
 
   function removeOverlay(cm) {
     var state = cm.state.matchHighlighter;
     if (state.overlay) {
       cm.removeOverlay(state.overlay);
--- a/devtools/client/sourceeditor/codemirror/addon/search/search.js
+++ b/devtools/client/sourceeditor/codemirror/addon/search/search.js
@@ -49,25 +49,26 @@
   }
 
   function queryCaseInsensitive(query) {
     return typeof query == "string" && query == query.toLowerCase();
   }
 
   function getSearchCursor(cm, query, pos) {
     // Heuristic: if the query string is all lowercase, do a case insensitive search.
-    return cm.getSearchCursor(query, pos, queryCaseInsensitive(query));
+    return cm.getSearchCursor(query, pos, {caseFold: queryCaseInsensitive(query), multiline: true});
   }
 
-  function persistentDialog(cm, text, deflt, f) {
-    cm.openDialog(text, f, {
+  function persistentDialog(cm, text, deflt, onEnter, onKeyDown) {
+    cm.openDialog(text, onEnter, {
       value: deflt,
       selectValueOnOpen: true,
       closeOnEnter: false,
-      onClose: function() { clearSearch(cm); }
+      onClose: function() { clearSearch(cm); },
+      onKeyDown: onKeyDown
     });
   }
 
   function dialog(cm, text, shortText, deflt, f) {
     if (cm.openDialog) cm.openDialog(text, f, {value: deflt, selectValueOnOpen: true});
     else f(prompt(shortText, deflt));
   }
 
@@ -106,17 +107,17 @@
     state.overlay = searchOverlay(state.query, queryCaseInsensitive(state.query));
     cm.addOverlay(state.overlay);
     if (cm.showMatchesOnScrollbar) {
       if (state.annotate) { state.annotate.clear(); state.annotate = null; }
       state.annotate = cm.showMatchesOnScrollbar(state.query, queryCaseInsensitive(state.query));
     }
   }
 
-  function doSearch(cm, rev, persistent) {
+  function doSearch(cm, rev, persistent, immediate) {
     if (!queryDialog) {
       let doc = cm.getWrapperElement().ownerDocument;
       let inp = doc.createElement("input");
 
       inp.type = "search";
       inp.placeholder = cm.l10n("findCmd.promptMessage");
       inp.style.marginInlineStart = "1em";
       inp.style.marginInlineEnd = "1em";
@@ -128,32 +129,50 @@
       queryDialog.style.display = "flex";
     }
 
     var state = getSearchState(cm);
     if (state.query) return findNext(cm, rev);
     var q = cm.getSelection() || state.lastQuery;
     if (persistent && cm.openDialog) {
       var hiding = null
-      persistentDialog(cm, queryDialog, q, function(query, event) {
+      var searchNext = function(query, event) {
         CodeMirror.e_stop(event);
         if (!query) return;
         if (query != state.queryText) {
           startSearch(cm, state, query);
           state.posFrom = state.posTo = cm.getCursor();
         }
         if (hiding) hiding.style.opacity = 1
         findNext(cm, event.shiftKey, function(_, to) {
           var dialog
           if (to.line < 3 && document.querySelector &&
               (dialog = cm.display.wrapper.querySelector(".CodeMirror-dialog")) &&
               dialog.getBoundingClientRect().bottom - 4 > cm.cursorCoords(to, "window").top)
             (hiding = dialog).style.opacity = .4
         })
+      };
+      persistentDialog(cm, queryDialog, q, searchNext, function(event, query) {
+        var keyName = CodeMirror.keyName(event)
+        var cmd = CodeMirror.keyMap[cm.getOption("keyMap")][keyName]
+        if (!cmd) cmd = cm.getOption('extraKeys')[keyName]
+        if (cmd == "findNext" || cmd == "findPrev" ||
+          cmd == "findPersistentNext" || cmd == "findPersistentPrev") {
+          CodeMirror.e_stop(event);
+          startSearch(cm, getSearchState(cm), query);
+          cm.execCommand(cmd);
+        } else if (cmd == "find" || cmd == "findPersistent") {
+          CodeMirror.e_stop(event);
+          searchNext(query, event);
+        }
       });
+      if (immediate && q) {
+        startSearch(cm, state, q);
+        findNext(cm, rev);
+      }
     } else {
       dialog(cm, queryDialog, "Search for:", q, function(query) {
         if (query && !state.query) cm.operation(function() {
           startSearch(cm, state, query);
           state.posFrom = state.posTo = cm.getCursor();
           findNext(cm, rev);
         });
       });
@@ -179,34 +198,34 @@
     if (!state.query) return;
     state.query = state.queryText = null;
     cm.removeOverlay(state.overlay);
     if (state.annotate) { state.annotate.clear(); state.annotate = null; }
   });}
 
   var replaceQueryDialog =
     ' <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">(Use /re/ syntax for regexp search)</span>';
-  var replacementQueryDialog = 'With: <input type="text" style="width: 10em" class="CodeMirror-search-field"/>';
-  var doReplaceConfirm = "Replace? <button>Yes</button> <button>No</button> <button>All</button> <button>Stop</button>";
+  var replacementQueryDialog = '<span class="CodeMirror-search-label">With:</span> <input type="text" style="width: 10em" class="CodeMirror-search-field"/>';
+  var doReplaceConfirm = '<span class="CodeMirror-search-label">Replace?</span> <button>Yes</button> <button>No</button> <button>All</button> <button>Stop</button>';
 
   function replaceAll(cm, query, text) {
     cm.operation(function() {
       for (var cursor = getSearchCursor(cm, query); cursor.findNext();) {
         if (typeof query != "string") {
           var match = cm.getRange(cursor.from(), cursor.to()).match(query);
           cursor.replace(text.replace(/\$(\d)/g, function(_, i) {return match[i];}));
         } else cursor.replace(text);
       }
     });
   }
 
   function replace(cm, all) {
     if (cm.getOption("readOnly")) return;
     var query = cm.getSelection() || getSearchState(cm).lastQuery;
-    var dialogText = all ? "Replace all:" : "Replace:"
+    var dialogText = '<span class="CodeMirror-search-label">' + (all ? 'Replace all:' : 'Replace:') + '</span>';
     dialog(cm, dialogText + replaceQueryDialog, dialogText, query, function(query) {
       if (!query) return;
       query = parseQuery(query);
       dialog(cm, replacementQueryDialog, "Replace with:", "", function(text) {
         text = parseString(text)
         if (all) {
           replaceAll(cm, query, text)
         } else {
@@ -233,14 +252,16 @@
           advance();
         }
       });
     });
   }
 
   CodeMirror.commands.find = function(cm) {clearSearch(cm); doSearch(cm);};
   CodeMirror.commands.findPersistent = function(cm) {clearSearch(cm); doSearch(cm, false, true);};
+  CodeMirror.commands.findPersistentNext = function(cm) {doSearch(cm, false, true, true);};
+  CodeMirror.commands.findPersistentPrev = function(cm) {doSearch(cm, true, true, true);};
   CodeMirror.commands.findNext = doSearch;
   CodeMirror.commands.findPrev = function(cm) {doSearch(cm, true);};
   CodeMirror.commands.clearSearch = clearSearch;
   CodeMirror.commands.replace = replace;
   CodeMirror.commands.replaceAll = function(cm) {replace(cm, true);};
 });
--- a/devtools/client/sourceeditor/codemirror/addon/search/searchcursor.js
+++ b/devtools/client/sourceeditor/codemirror/addon/search/searchcursor.js
@@ -1,189 +1,287 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
-    mod(require("../../lib/codemirror"));
+    mod(require("../../lib/codemirror"))
   else if (typeof define == "function" && define.amd) // AMD
-    define(["../../lib/codemirror"], mod);
+    define(["../../lib/codemirror"], mod)
   else // Plain browser env
-    mod(CodeMirror);
+    mod(CodeMirror)
 })(function(CodeMirror) {
-  "use strict";
-  var Pos = CodeMirror.Pos;
+  "use strict"
+  var Pos = CodeMirror.Pos
+
+  function regexpFlags(regexp) {
+    var flags = regexp.flags
+    return flags != null ? flags : (regexp.ignoreCase ? "i" : "")
+      + (regexp.global ? "g" : "")
+      + (regexp.multiline ? "m" : "")
+  }
+
+  function ensureGlobal(regexp) {
+    return regexp.global ? regexp : new RegExp(regexp.source, regexpFlags(regexp) + "g")
+  }
 
-  function SearchCursor(doc, query, pos, caseFold) {
-    this.atOccurrence = false; this.doc = doc;
-    if (caseFold == null && typeof query == "string") caseFold = false;
+  function maybeMultiline(regexp) {
+    return /\\s|\\n|\n|\\W|\\D|\[\^/.test(regexp.source)
+  }
 
-    pos = pos ? doc.clipPos(pos) : Pos(0, 0);
-    this.pos = {from: pos, to: pos};
+  function searchRegexpForward(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    for (var line = start.line, ch = start.ch, last = doc.lastLine(); line <= last; line++, ch = 0) {
+      regexp.lastIndex = ch
+      var string = doc.getLine(line), match = regexp.exec(string)
+      if (match)
+        return {from: Pos(line, match.index),
+                to: Pos(line, match.index + match[0].length),
+                match: match}
+    }
+  }
+
+  function searchRegexpForwardMultiline(doc, regexp, start) {
+    if (!maybeMultiline(regexp)) return searchRegexpForward(doc, regexp, start)
 
-    // The matches method is filled in based on the type of query.
-    // It takes a position and a direction, and returns an object
-    // describing the next occurrence of the query, or null if no
-    // more matches were found.
-    if (typeof query != "string") { // Regexp match
-      if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
-      this.matches = function(reverse, pos) {
-        if (reverse) {
-          query.lastIndex = 0;
-          var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;
-          for (;;) {
-            query.lastIndex = cutOff;
-            var newMatch = query.exec(line);
-            if (!newMatch) break;
-            match = newMatch;
-            start = match.index;
-            cutOff = match.index + (match[0].length || 1);
-            if (cutOff == line.length) break;
-          }
-          var matchLen = (match && match[0].length) || 0;
-          if (!matchLen) {
-            if (start == 0 && line.length == 0) {match = undefined;}
-            else if (start != doc.getLine(pos.line).length) {
-              matchLen++;
-            }
-          }
-        } else {
-          query.lastIndex = pos.ch;
-          var line = doc.getLine(pos.line), match = query.exec(line);
-          var matchLen = (match && match[0].length) || 0;
-          var start = match && match.index;
-          if (start + matchLen != line.length && !matchLen) matchLen = 1;
-        }
-        if (match && matchLen)
-          return {from: Pos(pos.line, start),
-                  to: Pos(pos.line, start + matchLen),
-                  match: match};
-      };
-    } else { // String query
-      var origQuery = query;
-      if (caseFold) query = query.toLowerCase();
-      var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
-      var target = query.split("\n");
-      // Different methods for single-line and multi-line queries
-      if (target.length == 1) {
-        if (!query.length) {
-          // Empty string would match anything and never progress, so
-          // we define it to match nothing instead.
-          this.matches = function() {};
-        } else {
-          this.matches = function(reverse, pos) {
-            if (reverse) {
-              var orig = doc.getLine(pos.line).slice(0, pos.ch), line = fold(orig);
-              var match = line.lastIndexOf(query);
-              if (match > -1) {
-                match = adjustPos(orig, line, match);
-                return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
-              }
-             } else {
-               var orig = doc.getLine(pos.line).slice(pos.ch), line = fold(orig);
-               var match = line.indexOf(query);
-               if (match > -1) {
-                 match = adjustPos(orig, line, match) + pos.ch;
-                 return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
-               }
-            }
-          };
-        }
-      } else {
-        var origTarget = origQuery.split("\n");
-        this.matches = function(reverse, pos) {
-          var last = target.length - 1;
-          if (reverse) {
-            if (pos.line - (target.length - 1) < doc.firstLine()) return;
-            if (fold(doc.getLine(pos.line).slice(0, origTarget[last].length)) != target[target.length - 1]) return;
-            var to = Pos(pos.line, origTarget[last].length);
-            for (var ln = pos.line - 1, i = last - 1; i >= 1; --i, --ln)
-              if (target[i] != fold(doc.getLine(ln))) return;
-            var line = doc.getLine(ln), cut = line.length - origTarget[0].length;
-            if (fold(line.slice(cut)) != target[0]) return;
-            return {from: Pos(ln, cut), to: to};
-          } else {
-            if (pos.line + (target.length - 1) > doc.lastLine()) return;
-            var line = doc.getLine(pos.line), cut = line.length - origTarget[0].length;
-            if (fold(line.slice(cut)) != target[0]) return;
-            var from = Pos(pos.line, cut);
-            for (var ln = pos.line + 1, i = 1; i < last; ++i, ++ln)
-              if (target[i] != fold(doc.getLine(ln))) return;
-            if (fold(doc.getLine(ln).slice(0, origTarget[last].length)) != target[last]) return;
-            return {from: from, to: Pos(ln, origTarget[last].length)};
-          }
-        };
+    regexp = ensureGlobal(regexp)
+    var string, chunk = 1
+    for (var line = start.line, last = doc.lastLine(); line <= last;) {
+      // This grows the search buffer in exponentially-sized chunks
+      // between matches, so that nearby matches are fast and don't
+      // require concatenating the whole document (in case we're
+      // searching for something that has tons of matches), but at the
+      // same time, the amount of retries is limited.
+      for (var i = 0; i < chunk; i++) {
+        var curLine = doc.getLine(line++)
+        string = string == null ? curLine : string + "\n" + curLine
+      }
+      chunk = chunk * 2
+      regexp.lastIndex = start.ch
+      var match = regexp.exec(string)
+      if (match) {
+        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+        var startLine = start.line + before.length - 1, startCh = before[before.length - 1].length
+        return {from: Pos(startLine, startCh),
+                to: Pos(startLine + inside.length - 1,
+                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+                match: match}
+      }
+    }
+  }
+
+  function lastMatchIn(string, regexp) {
+    var cutOff = 0, match
+    for (;;) {
+      regexp.lastIndex = cutOff
+      var newMatch = regexp.exec(string)
+      if (!newMatch) return match
+      match = newMatch
+      cutOff = match.index + (match[0].length || 1)
+      if (cutOff == string.length) return match
+    }
+  }
+
+  function searchRegexpBackward(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    for (var line = start.line, ch = start.ch, first = doc.firstLine(); line >= first; line--, ch = -1) {
+      var string = doc.getLine(line)
+      if (ch > -1) string = string.slice(0, ch)
+      var match = lastMatchIn(string, regexp)
+      if (match)
+        return {from: Pos(line, match.index),
+                to: Pos(line, match.index + match[0].length),
+                match: match}
+    }
+  }
+
+  function searchRegexpBackwardMultiline(doc, regexp, start) {
+    regexp = ensureGlobal(regexp)
+    var string, chunk = 1
+    for (var line = start.line, first = doc.firstLine(); line >= first;) {
+      for (var i = 0; i < chunk; i++) {
+        var curLine = doc.getLine(line--)
+        string = string == null ? curLine.slice(0, start.ch) : curLine + "\n" + string
+      }
+      chunk *= 2
+
+      var match = lastMatchIn(string, regexp)
+      if (match) {
+        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+        var startLine = line + before.length, startCh = before[before.length - 1].length
+        return {from: Pos(startLine, startCh),
+                to: Pos(startLine + inside.length - 1,
+                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+                match: match}
       }
     }
   }
 
+  var doFold, noFold
+  if (String.prototype.normalize) {
+    doFold = function(str) { return str.normalize("NFD").toLowerCase() }
+    noFold = function(str) { return str.normalize("NFD") }
+  } else {
+    doFold = function(str) { return str.toLowerCase() }
+    noFold = function(str) { return str }
+  }
+
+  // Maps a position in a case-folded line back to a position in the original line
+  // (compensating for codepoints increasing in number during folding)
+  function adjustPos(orig, folded, pos, foldFunc) {
+    if (orig.length == folded.length) return pos
+    for (var pos1 = Math.min(pos, orig.length);;) {
+      var len1 = foldFunc(orig.slice(0, pos1)).length
+      if (len1 < pos) ++pos1
+      else if (len1 > pos) --pos1
+      else return pos1
+    }
+  }
+
+  function searchStringForward(doc, query, start, caseFold) {
+    // Empty string would match anything and never progress, so we
+    // define it to match nothing instead.
+    if (!query.length) return null
+    var fold = caseFold ? doFold : noFold
+    var lines = fold(query).split(/\r|\n\r?/)
+
+    search: for (var line = start.line, ch = start.ch, last = doc.lastLine() + 1 - lines.length; line <= last; line++, ch = 0) {
+      var orig = doc.getLine(line).slice(ch), string = fold(orig)
+      if (lines.length == 1) {
+        var found = string.indexOf(lines[0])
+        if (found == -1) continue search
+        var start = adjustPos(orig, string, found, fold) + ch
+        return {from: Pos(line, adjustPos(orig, string, found, fold) + ch),
+                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold) + ch)}
+      } else {
+        var cutFrom = string.length - lines[0].length
+        if (string.slice(cutFrom) != lines[0]) continue search
+        for (var i = 1; i < lines.length - 1; i++)
+          if (fold(doc.getLine(line + i)) != lines[i]) continue search
+        var end = doc.getLine(line + lines.length - 1), endString = fold(end), lastLine = lines[lines.length - 1]
+        if (end.slice(0, lastLine.length) != lastLine) continue search
+        return {from: Pos(line, adjustPos(orig, string, cutFrom, fold) + ch),
+                to: Pos(line + lines.length - 1, adjustPos(end, endString, lastLine.length, fold))}
+      }
+    }
+  }
+
+  function searchStringBackward(doc, query, start, caseFold) {
+    if (!query.length) return null
+    var fold = caseFold ? doFold : noFold
+    var lines = fold(query).split(/\r|\n\r?/)
+
+    search: for (var line = start.line, ch = start.ch, first = doc.firstLine() - 1 + lines.length; line >= first; line--, ch = -1) {
+      var orig = doc.getLine(line)
+      if (ch > -1) orig = orig.slice(0, ch)
+      var string = fold(orig)
+      if (lines.length == 1) {
+        var found = string.lastIndexOf(lines[0])
+        if (found == -1) continue search
+        return {from: Pos(line, adjustPos(orig, string, found, fold)),
+                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold))}
+      } else {
+        var lastLine = lines[lines.length - 1]
+        if (string.slice(0, lastLine.length) != lastLine) continue search
+        for (var i = 1, start = line - lines.length + 1; i < lines.length - 1; i++)
+          if (fold(doc.getLine(start + i)) != lines[i]) continue search
+        var top = doc.getLine(line + 1 - lines.length), topString = fold(top)
+        if (topString.slice(topString.length - lines[0].length) != lines[0]) continue search
+        return {from: Pos(line + 1 - lines.length, adjustPos(top, topString, top.length - lines[0].length, fold)),
+                to: Pos(line, adjustPos(orig, string, lastLine.length, fold))}
+      }
+    }
+  }
+
+  function SearchCursor(doc, query, pos, options) {
+    this.atOccurrence = false
+    this.doc = doc
+    pos = pos ? doc.clipPos(pos) : Pos(0, 0)
+    this.pos = {from: pos, to: pos}
+
+    var caseFold
+    if (typeof options == "object") {
+      caseFold = options.caseFold
+    } else { // Backwards compat for when caseFold was the 4th argument
+      caseFold = options
+      options = null
+    }
+
+    if (typeof query == "string") {
+      if (caseFold == null) caseFold = false
+      this.matches = function(reverse, pos) {
+        return (reverse ? searchStringBackward : searchStringForward)(doc, query, pos, caseFold)
+      }
+    } else {
+      query = ensureGlobal(query)
+      if (!options || options.multiline !== false)
+        this.matches = function(reverse, pos) {
+          return (reverse ? searchRegexpBackwardMultiline : searchRegexpForwardMultiline)(doc, query, pos)
+        }
+      else
+        this.matches = function(reverse, pos) {
+          return (reverse ? searchRegexpBackward : searchRegexpForward)(doc, query, pos)
+        }
+    }
+  }
+
   SearchCursor.prototype = {
-    findNext: function() {return this.find(false);},
-    findPrevious: function() {return this.find(true);},
+    findNext: function() {return this.find(false)},
+    findPrevious: function() {return this.find(true)},
 
     find: function(reverse) {
-      var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);
-      function savePosAndFail(line) {
-        var pos = Pos(line, 0);
-        self.pos = {from: pos, to: pos};
-        self.atOccurrence = false;
-        return false;
+      var result = this.matches(reverse, this.doc.clipPos(reverse ? this.pos.from : this.pos.to))
+
+      // Implements weird auto-growing behavior on null-matches for
+      // backwards-compatiblity with the vim code (unfortunately)
+      while (result && CodeMirror.cmpPos(result.from, result.to) == 0) {
+        if (reverse) {
+          if (result.from.ch) result.from = Pos(result.from.line, result.from.ch - 1)
+          else if (result.from.line == this.doc.firstLine()) result = null
+          else result = this.matches(reverse, this.doc.clipPos(Pos(result.from.line - 1)))
+        } else {
+          if (result.to.ch < this.doc.getLine(result.to.line).length) result.to = Pos(result.to.line, result.to.ch + 1)
+          else if (result.to.line == this.doc.lastLine()) result = null
+          else result = this.matches(reverse, Pos(result.to.line + 1, 0))
+        }
       }
 
-      for (;;) {
-        if (this.pos = this.matches(reverse, pos)) {
-          this.atOccurrence = true;
-          return this.pos.match || true;
-        }
-        if (reverse) {
-          if (!pos.line) return savePosAndFail(0);
-          pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);
-        }
-        else {
-          var maxLine = this.doc.lineCount();
-          if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
-          pos = Pos(pos.line + 1, 0);
-        }
+      if (result) {
+        this.pos = result
+        this.atOccurrence = true
+        return this.pos.match || true
+      } else {
+        var end = Pos(reverse ? this.doc.firstLine() : this.doc.lastLine() + 1, 0)
+        this.pos = {from: end, to: end}
+        return this.atOccurrence = false
       }
     },
 
-    from: function() {if (this.atOccurrence) return this.pos.from;},
-    to: function() {if (this.atOccurrence) return this.pos.to;},
+    from: function() {if (this.atOccurrence) return this.pos.from},
+    to: function() {if (this.atOccurrence) return this.pos.to},
 
     replace: function(newText, origin) {
-      if (!this.atOccurrence) return;
-      var lines = CodeMirror.splitLines(newText);
-      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin);
+      if (!this.atOccurrence) return
+      var lines = CodeMirror.splitLines(newText)
+      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin)
       this.pos.to = Pos(this.pos.from.line + lines.length - 1,
-                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));
-    }
-  };
-
-  // Maps a position in a case-folded line back to a position in the original line
-  // (compensating for codepoints increasing in number during folding)
-  function adjustPos(orig, folded, pos) {
-    if (orig.length == folded.length) return pos;
-    for (var pos1 = Math.min(pos, orig.length);;) {
-      var len1 = orig.slice(0, pos1).toLowerCase().length;
-      if (len1 < pos) ++pos1;
-      else if (len1 > pos) --pos1;
-      else return pos1;
+                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0))
     }
   }
 
   CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
-    return new SearchCursor(this.doc, query, pos, caseFold);
-  });
+    return new SearchCursor(this.doc, query, pos, caseFold)
+  })
   CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
-    return new SearchCursor(this, query, pos, caseFold);
-  });
+    return new SearchCursor(this, query, pos, caseFold)
+  })
 
   CodeMirror.defineExtension("selectMatches", function(query, caseFold) {
-    var ranges = [];
-    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold);
+    var ranges = []
+    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold)
     while (cur.findNext()) {
-      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break;
-      ranges.push({anchor: cur.from(), head: cur.to()});
+      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break
+      ranges.push({anchor: cur.from(), head: cur.to()})
     }
     if (ranges.length)
-      this.setSelections(ranges, 0);
-  });
+      this.setSelections(ranges, 0)
+  })
 });
--- a/devtools/client/sourceeditor/codemirror/addon/selection/active-line.js
+++ b/devtools/client/sourceeditor/codemirror/addon/selection/active-line.js
@@ -1,40 +1,36 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
-// Because sometimes you need to style the cursor's line.
-//
-// Adds an option 'styleActiveLine' which, when enabled, gives the
-// active line's wrapping <div> the CSS class "CodeMirror-activeline",
-// and gives its background <div> the class "CodeMirror-activeline-background".
-
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   "use strict";
   var WRAP_CLASS = "CodeMirror-activeline";
   var BACK_CLASS = "CodeMirror-activeline-background";
   var GUTT_CLASS = "CodeMirror-activeline-gutter";
 
   CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
-    var prev = old && old != CodeMirror.Init;
-    if (val && !prev) {
+    var prev = old == CodeMirror.Init ? false : old;
+    if (val == prev) return
+    if (prev) {
+      cm.off("beforeSelectionChange", selectionChange);
+      clearActiveLines(cm);
+      delete cm.state.activeLines;
+    }
+    if (val) {
       cm.state.activeLines = [];
       updateActiveLines(cm, cm.listSelections());
       cm.on("beforeSelectionChange", selectionChange);
-    } else if (!val && prev) {
-      cm.off("beforeSelectionChange", selectionChange);
-      clearActiveLines(cm);
-      delete cm.state.activeLines;
     }
   });
 
   function clearActiveLines(cm) {
     for (var i = 0; i < cm.state.activeLines.length; i++) {
       cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
       cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
       cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
@@ -47,17 +43,19 @@
       if (a[i] != b[i]) return false;
     return true;
   }
 
   function updateActiveLines(cm, ranges) {
     var active = [];
     for (var i = 0; i < ranges.length; i++) {
       var range = ranges[i];
-      if (!range.empty()) continue;
+      var option = cm.getOption("styleActiveLine");
+      if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
+        continue
       var line = cm.getLineHandleVisualStart(range.head.line);
       if (active[active.length - 1] != line) active.push(line);
     }
     if (sameArray(cm.state.activeLines, active)) return;
     cm.operation(function() {
       clearActiveLines(cm);
       for (var i = 0; i < active.length; i++) {
         cm.addLineClass(active[i], "wrap", WRAP_CLASS);
--- a/devtools/client/sourceeditor/codemirror/addon/selection/mark-selection.js
+++ b/devtools/client/sourceeditor/codemirror/addon/selection/mark-selection.js
@@ -29,21 +29,22 @@
       cm.off("cursorActivity", onCursorActivity);
       cm.off("change", onChange);
       clear(cm);
       cm.state.markedSelection = cm.state.markedSelectionStyle = null;
     }
   });
 
   function onCursorActivity(cm) {
-    cm.operation(function() { update(cm); });
+    if (cm.state.markedSelection)
+      cm.operation(function() { update(cm); });
   }
 
   function onChange(cm) {
-    if (cm.state.markedSelection.length)
+    if (cm.state.markedSelection && cm.state.markedSelection.length)
       cm.operation(function() { clear(cm); });
   }
 
   var CHUNK_SIZE = 8;
   var Pos = CodeMirror.Pos;
   var cmp = CodeMirror.cmpPos;
 
   function coverRange(cm, from, to, addAt) {
--- a/devtools/client/sourceeditor/codemirror/codemirror.bundle.js
+++ b/devtools/client/sourceeditor/codemirror/codemirror.bundle.js
@@ -38,17 +38,17 @@ var CodeMirror =
 /******/ 	__webpack_require__.p = "";
 
 /******/ 	// Load entry module and return exports
 /******/ 	return __webpack_require__(0);
 /******/ })
 /************************************************************************/
 /******/ ([
 /* 0 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	__webpack_require__(1);
 	__webpack_require__(3);
 	__webpack_require__(4);
 	__webpack_require__(5);
 	__webpack_require__(6);
 	__webpack_require__(7);
 	__webpack_require__(8);
@@ -68,19 +68,19 @@ var CodeMirror =
 	__webpack_require__(22);
 	__webpack_require__(23);
 	__webpack_require__(24);
 	__webpack_require__(25);
 	__webpack_require__(26);
 	module.exports = __webpack_require__(2);
 
 
-/***/ },
+/***/ }),
 /* 1 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	// Open simple dialogs on top of an editor. Relies on dialog.css.
 
 	(function(mod) {
 	  if (true) // CommonJS
@@ -231,9142 +231,9807 @@ var CodeMirror =
 	    if (duration)
 	      doneTimer = setTimeout(close, duration);
 
 	    return close;
 	  });
 	});
 
 
-/***/ },
+/***/ }),
 /* 2 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	// This is CodeMirror (http://codemirror.net), a code editor
 	// implemented in JavaScript on top of the browser's DOM.
 	//
 	// You can find some technical background for some of the code below
 	// at http://marijnhaverbeke.nl/blog/#cm-internals .
 
-	(function(mod) {
-	  if (true) // CommonJS
-	    module.exports = mod();
-	  else if (typeof define == "function" && define.amd) // AMD
-	    return define([], mod);
-	  else // Plain browser env
-	    (this || window).CodeMirror = mod();
-	})(function() {
-	  "use strict";
-
-	  // BROWSER SNIFFING
-
-	  // Kludges for bugs and behavior differences that can't be feature
-	  // detected are enabled based on userAgent etc sniffing.
-	  var userAgent = navigator.userAgent;
-	  var platform = navigator.platform;
-
-	  var gecko = /gecko\/\d/i.test(userAgent);
-	  var ie_upto10 = /MSIE \d/.test(userAgent);
-	  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
-	  var ie = ie_upto10 || ie_11up;
-	  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]);
-	  var webkit = /WebKit\//.test(userAgent);
-	  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
-	  var chrome = /Chrome\//.test(userAgent);
-	  var presto = /Opera\//.test(userAgent);
-	  var safari = /Apple Computer/.test(navigator.vendor);
-	  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
-	  var phantom = /PhantomJS/.test(userAgent);
-
-	  var ios = /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
-	  // This is woefully incomplete. Suggestions for alternative methods welcome.
-	  var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
-	  var mac = ios || /Mac/.test(platform);
-	  var chromeOS = /\bCrOS\b/.test(userAgent);
-	  var windows = /win/i.test(platform);
-
-	  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
-	  if (presto_version) presto_version = Number(presto_version[1]);
-	  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
-	  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
-	  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
-	  var captureRightClick = gecko || (ie && ie_version >= 9);
-
-	  // Optimize some code when these features are not used.
-	  var sawReadOnlySpans = false, sawCollapsedSpans = false;
-
-	  // EDITOR CONSTRUCTOR
-
-	  // A CodeMirror instance represents an editor. This is the object
-	  // that user code is usually dealing with.
-
-	  function CodeMirror(place, options) {
-	    if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
-
-	    this.options = options = options ? copyObj(options) : {};
-	    // Determine effective options based on given values and defaults.
-	    copyObj(defaults, options, false);
-	    setGuttersForLineNumbers(options);
-
-	    var doc = options.value;
-	    if (typeof doc == "string") doc = new Doc(doc, options.mode, null, options.lineSeparator);
-	    this.doc = doc;
-
-	    var input = new CodeMirror.inputStyles[options.inputStyle](this);
-	    var display = this.display = new Display(place, doc, input);
-	    display.wrapper.CodeMirror = this;
-	    updateGutters(this);
-	    themeChanged(this);
-	    if (options.lineWrapping)
-	      this.display.wrapper.className += " CodeMirror-wrap";
-	    if (options.autofocus && !mobile) display.input.focus();
-	    initScrollbars(this);
-
-	    this.state = {
-	      keyMaps: [],  // stores maps added by addKeyMap
-	      overlays: [], // highlighting overlays, as added by addOverlay
-	      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
-	      overwrite: false,
-	      delayingBlurEvent: false,
-	      focused: false,
-	      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
-	      pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
-	      selectingText: false,
-	      draggingText: false,
-	      highlight: new Delayed(), // stores highlight worker timeout
-	      keySeq: null,  // Unfinished key sequence
-	      specialChars: null
-	    };
-
-	    var cm = this;
-
-	    // Override magic textarea content restore that IE sometimes does
-	    // on our hidden textarea on reload
-	    if (ie && ie_version < 11) setTimeout(function() { cm.display.input.reset(true); }, 20);
-
-	    registerEventHandlers(this);
-	    ensureGlobalHandlers();
-
-	    startOperation(this);
-	    this.curOp.forceUpdate = true;
-	    attachDoc(this, doc);
-
-	    if ((options.autofocus && !mobile) || cm.hasFocus())
-	      setTimeout(bind(onFocus, this), 20);
-	    else
-	      onBlur(this);
-
-	    for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
-	      optionHandlers[opt](this, options[opt], Init);
-	    maybeUpdateLineNumberWidth(this);
-	    if (options.finishInit) options.finishInit(this);
-	    for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
-	    endOperation(this);
-	    // Suppress optimizelegibility in Webkit, since it breaks text
-	    // measuring on line wrapping boundaries.
-	    if (webkit && options.lineWrapping &&
-	        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
-	      display.lineDiv.style.textRendering = "auto";
-	  }
-
-	  // DISPLAY CONSTRUCTOR
-
-	  // The display handles the DOM integration, both for input reading
-	  // and content drawing. It holds references to DOM nodes and
-	  // display-related state.
-
-	  function Display(place, doc, input) {
-	    var d = this;
-	    this.input = input;
-
-	    // Covers bottom-right square when both scrollbars are present.
-	    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
-	    d.scrollbarFiller.setAttribute("cm-not-content", "true");
-	    // Covers bottom of gutter when coverGutterNextToScrollbar is on
-	    // and h scrollbar is present.
-	    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
-	    d.gutterFiller.setAttribute("cm-not-content", "true");
-	    // Will contain the actual code, positioned to cover the viewport.
-	    d.lineDiv = elt("div", null, "CodeMirror-code");
-	    // Elements are added to these to represent selection and cursors.
-	    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
-	    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
-	    // A visibility: hidden element used to find the size of things.
-	    d.measure = elt("div", null, "CodeMirror-measure");
-	    // When lines outside of the viewport are measured, they are drawn in this.
-	    d.lineMeasure = elt("div", null, "CodeMirror-measure");
-	    // Wraps everything that needs to exist inside the vertically-padded coordinate system
-	    d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
-	                      null, "position: relative; outline: none");
-	    // Moved around its parent to cover visible view.
-	    d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
-	    // Set to the height of the document, allowing scrolling.
-	    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
-	    d.sizerWidth = null;
-	    // Behavior of elts with overflow: auto and padding is
-	    // inconsistent across browsers. This is used to ensure the
-	    // scrollable area is big enough.
-	    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
-	    // Will contain the gutters, if any.
-	    d.gutters = elt("div", null, "CodeMirror-gutters");
-	    d.lineGutter = null;
-	    // Actual scrollable element.
-	    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
-	    d.scroller.setAttribute("tabIndex", "-1");
-	    // The element in which the editor lives.
-	    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
-
-	    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
-	    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
-	    if (!webkit && !(gecko && mobile)) d.scroller.draggable = true;
-
-	    if (place) {
-	      if (place.appendChild) place.appendChild(d.wrapper);
-	      else place(d.wrapper);
-	    }
-
-	    // Current rendered range (may be bigger than the view window).
-	    d.viewFrom = d.viewTo = doc.first;
-	    d.reportedViewFrom = d.reportedViewTo = doc.first;
-	    // Information about the rendered lines.
-	    d.view = [];
-	    d.renderedView = null;
-	    // Holds info about a single rendered line when it was rendered
-	    // for measurement, while not in view.
-	    d.externalMeasured = null;
-	    // Empty space (in pixels) above the view
-	    d.viewOffset = 0;
-	    d.lastWrapHeight = d.lastWrapWidth = 0;
-	    d.updateLineNumbers = null;
-
-	    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
-	    d.scrollbarsClipped = false;
-
-	    // Used to only resize the line number gutter when necessary (when
-	    // the amount of lines crosses a boundary that makes its width change)
-	    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
-	    // Set to true when a non-horizontal-scrolling line widget is
-	    // added. As an optimization, line widget aligning is skipped when
-	    // this is false.
-	    d.alignWidgets = false;
-
-	    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-
-	    // Tracks the maximum line length so that the horizontal scrollbar
-	    // can be kept static when scrolling.
-	    d.maxLine = null;
-	    d.maxLineLength = 0;
-	    d.maxLineChanged = false;
-
-	    // Used for measuring wheel scrolling granularity
-	    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
-
-	    // True when shift is held down.
-	    d.shift = false;
-
-	    // Used to track whether anything happened since the context menu
-	    // was opened.
-	    d.selForContextMenu = null;
-
-	    d.activeTouch = null;
-
-	    input.init(d);
-	  }
-
-	  // STATE UPDATES
-
-	  // Used to get the editor into a consistent state again when options change.
-
-	  function loadMode(cm) {
-	    cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
-	    resetModeState(cm);
-	  }
-
-	  function resetModeState(cm) {
-	    cm.doc.iter(function(line) {
-	      if (line.stateAfter) line.stateAfter = null;
-	      if (line.styles) line.styles = null;
-	    });
-	    cm.doc.frontier = cm.doc.first;
-	    startWorker(cm, 100);
-	    cm.state.modeGen++;
-	    if (cm.curOp) regChange(cm);
-	  }
-
-	  function wrappingChanged(cm) {
-	    if (cm.options.lineWrapping) {
-	      addClass(cm.display.wrapper, "CodeMirror-wrap");
-	      cm.display.sizer.style.minWidth = "";
-	      cm.display.sizerWidth = null;
+	(function (global, factory) {
+	   true ? module.exports = factory() :
+	  typeof define === 'function' && define.amd ? define(factory) :
+	  (global.CodeMirror = factory());
+	}(this, (function () { 'use strict';
+
+	// Kludges for bugs and behavior differences that can't be feature
+	// detected are enabled based on userAgent etc sniffing.
+	var userAgent = navigator.userAgent
+	var platform = navigator.platform
+
+	var gecko = /gecko\/\d/i.test(userAgent)
+	var ie_upto10 = /MSIE \d/.test(userAgent)
+	var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent)
+	var edge = /Edge\/(\d+)/.exec(userAgent)
+	var ie = ie_upto10 || ie_11up || edge
+	var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1])
+	var webkit = !edge && /WebKit\//.test(userAgent)
+	var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent)
+	var chrome = !edge && /Chrome\//.test(userAgent)
+	var presto = /Opera\//.test(userAgent)
+	var safari = /Apple Computer/.test(navigator.vendor)
+	var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent)
+	var phantom = /PhantomJS/.test(userAgent)
+
+	var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent)
+	var android = /Android/.test(userAgent)
+	// This is woefully incomplete. Suggestions for alternative methods welcome.
+	var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent)
+	var mac = ios || /Mac/.test(platform)
+	var chromeOS = /\bCrOS\b/.test(userAgent)
+	var windows = /win/i.test(platform)
+
+	var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/)
+	if (presto_version) { presto_version = Number(presto_version[1]) }
+	if (presto_version && presto_version >= 15) { presto = false; webkit = true }
+	// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+	var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11))
+	var captureRightClick = gecko || (ie && ie_version >= 9)
+
+	function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+	var rmClass = function(node, cls) {
+	  var current = node.className
+	  var match = classTest(cls).exec(current)
+	  if (match) {
+	    var after = current.slice(match.index + match[0].length)
+	    node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
+	  }
+	}
+
+	function removeChildren(e) {
+	  for (var count = e.childNodes.length; count > 0; --count)
+	    { e.removeChild(e.firstChild) }
+	  return e
+	}
+
+	function removeChildrenAndAdd(parent, e) {
+	  return removeChildren(parent).appendChild(e)
+	}
+
+	function elt(tag, content, className, style) {
+	  var e = document.createElement(tag)
+	  if (className) { e.className = className }
+	  if (style) { e.style.cssText = style }
+	  if (typeof content == "string") { e.appendChild(document.createTextNode(content)) }
+	  else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]) } }
+	  return e
+	}
+	// wrapper for elt, which removes the elt from the accessibility tree
+	function eltP(tag, content, className, style) {
+	  var e = elt(tag, content, className, style)
+	  e.setAttribute("role", "presentation")
+	  return e
+	}
+
+	var range
+	if (document.createRange) { range = function(node, start, end, endNode) {
+	  var r = document.createRange()
+	  r.setEnd(endNode || node, end)
+	  r.setStart(node, start)
+	  return r
+	} }
+	else { range = function(node, start, end) {
+	  var r = document.body.createTextRange()
+	  try { r.moveToElementText(node.parentNode) }
+	  catch(e) { return r }
+	  r.collapse(true)
+	  r.moveEnd("character", end)
+	  r.moveStart("character", start)
+	  return r
+	} }
+
+	function contains(parent, child) {
+	  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+	    { child = child.parentNode }
+	  if (parent.contains)
+	    { return parent.contains(child) }
+	  do {
+	    if (child.nodeType == 11) { child = child.host }
+	    if (child == parent) { return true }
+	  } while (child = child.parentNode)
+	}
+
+	function activeElt() {
+	  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+	  // IE < 10 will throw when accessed while the page is loading or in an iframe.
+	  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+	  var activeElement
+	  try {
+	    activeElement = document.activeElement
+	  } catch(e) {
+	    activeElement = document.body || null
+	  }
+	  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+	    { activeElement = activeElement.shadowRoot.activeElement }
+	  return activeElement
+	}
+
+	function addClass(node, cls) {
+	  var current = node.className
+	  if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls }
+	}
+	function joinClasses(a, b) {
+	  var as = a.split(" ")
+	  for (var i = 0; i < as.length; i++)
+	    { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i] } }
+	  return b
+	}
+
+	var selectInput = function(node) { node.select() }
+	if (ios) // Mobile Safari apparently has a bug where select() is broken.
+	  { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length } }
+	else if (ie) // Suppress mysterious IE10 errors
+	  { selectInput = function(node) { try { node.select() } catch(_e) {} } }
+
+	function bind(f) {
+	  var args = Array.prototype.slice.call(arguments, 1)
+	  return function(){return f.apply(null, args)}
+	}
+
+	function copyObj(obj, target, overwrite) {
+	  if (!target) { target = {} }
+	  for (var prop in obj)
+	    { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+	      { target[prop] = obj[prop] } }
+	  return target
+	}
+
+	// Counts the column offset in a string, taking tabs into account.
+	// Used mostly to find indentation.
+	function countColumn(string, end, tabSize, startIndex, startValue) {
+	  if (end == null) {
+	    end = string.search(/[^\s\u00a0]/)
+	    if (end == -1) { end = string.length }
+	  }
+	  for (var i = startIndex || 0, n = startValue || 0;;) {
+	    var nextTab = string.indexOf("\t", i)
+	    if (nextTab < 0 || nextTab >= end)
+	      { return n + (end - i) }
+	    n += nextTab - i
+	    n += tabSize - (n % tabSize)
+	    i = nextTab + 1
+	  }
+	}
+
+	var Delayed = function() {this.id = null};
+	Delayed.prototype.set = function (ms, f) {
+	  clearTimeout(this.id)
+	  this.id = setTimeout(f, ms)
+	};
+
+	function indexOf(array, elt) {
+	  for (var i = 0; i < array.length; ++i)
+	    { if (array[i] == elt) { return i } }
+	  return -1
+	}
+
+	// Number of pixels added to scroller and sizer to hide scrollbar
+	var scrollerGap = 30
+
+	// Returned or thrown by various protocols to signal 'I'm not
+	// handling this'.
+	var Pass = {toString: function(){return "CodeMirror.Pass"}}
+
+	// Reused option objects for setSelection & friends
+	var sel_dontScroll = {scroll: false};
+	var sel_mouse = {origin: "*mouse"};
+	var sel_move = {origin: "+move"};
+	// The inverse of countColumn -- find the offset that corresponds to
+	// a particular column.
+	function findColumn(string, goal, tabSize) {
+	  for (var pos = 0, col = 0;;) {
+	    var nextTab = string.indexOf("\t", pos)
+	    if (nextTab == -1) { nextTab = string.length }
+	    var skipped = nextTab - pos
+	    if (nextTab == string.length || col + skipped >= goal)
+	      { return pos + Math.min(skipped, goal - col) }
+	    col += nextTab - pos
+	    col += tabSize - (col % tabSize)
+	    pos = nextTab + 1
+	    if (col >= goal) { return pos }
+	  }
+	}
+
+	var spaceStrs = [""]
+	function spaceStr(n) {
+	  while (spaceStrs.length <= n)
+	    { spaceStrs.push(lst(spaceStrs) + " ") }
+	  return spaceStrs[n]
+	}
+
+	function lst(arr) { return arr[arr.length-1] }
+
+	function map(array, f) {
+	  var out = []
+	  for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i) }
+	  return out
+	}
+
+	function insertSorted(array, value, score) {
+	  var pos = 0, priority = score(value)
+	  while (pos < array.length && score(array[pos]) <= priority) { pos++ }
+	  array.splice(pos, 0, value)
+	}
+
+	function nothing() {}
+
+	function createObj(base, props) {
+	  var inst
+	  if (Object.create) {
+	    inst = Object.create(base)
+	  } else {
+	    nothing.prototype = base
+	    inst = new nothing()
+	  }
+	  if (props) { copyObj(props, inst) }
+	  return inst
+	}
+
+	var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/
+	function isWordCharBasic(ch) {
+	  return /\w/.test(ch) || ch > "\x80" &&
+	    (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+	}
+	function isWordChar(ch, helper) {
+	  if (!helper) { return isWordCharBasic(ch) }
+	  if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+	  return helper.test(ch)
+	}
+
+	function isEmpty(obj) {
+	  for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+	  return true
+	}
+
+	// Extending unicode characters. A series of a non-extending char +
+	// any number of extending chars is treated as a single unit as far
+	// as editing and measuring is concerned. This is not fully correct,
+	// since some scripts/fonts/browsers also treat other configurations
+	// of code points as a group.
+	var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/
+	function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+	// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+	function skipExtendingChars(str, pos, dir) {
+	  while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir }
+	  return pos
+	}
+
+	// Returns the value from the range [`from`; `to`] that satisfies
+	// `pred` and is closest to `from`. Assumes that at least `to` satisfies `pred`.
+	function findFirst(pred, from, to) {
+	  for (;;) {
+	    if (Math.abs(from - to) <= 1) { return pred(from) ? from : to }
+	    var mid = Math.floor((from + to) / 2)
+	    if (pred(mid)) { to = mid }
+	    else { from = mid }
+	  }
+	}
+
+	// The display handles the DOM integration, both for input reading
+	// and content drawing. It holds references to DOM nodes and
+	// display-related state.
+
+	function Display(place, doc, input) {
+	  var d = this
+	  this.input = input
+
+	  // Covers bottom-right square when both scrollbars are present.
+	  d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
+	  d.scrollbarFiller.setAttribute("cm-not-content", "true")
+	  // Covers bottom of gutter when coverGutterNextToScrollbar is on
+	  // and h scrollbar is present.
+	  d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
+	  d.gutterFiller.setAttribute("cm-not-content", "true")
+	  // Will contain the actual code, positioned to cover the viewport.
+	  d.lineDiv = eltP("div", null, "CodeMirror-code")
+	  // Elements are added to these to represent selection and cursors.
+	  d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
+	  d.cursorDiv = elt("div", null, "CodeMirror-cursors")
+	  // A visibility: hidden element used to find the size of things.
+	  d.measure = elt("div", null, "CodeMirror-measure")
+	  // When lines outside of the viewport are measured, they are drawn in this.
+	  d.lineMeasure = elt("div", null, "CodeMirror-measure")
+	  // Wraps everything that needs to exist inside the vertically-padded coordinate system
+	  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+	                    null, "position: relative; outline: none")
+	  var lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
+	  // Moved around its parent to cover visible view.
+	  d.mover = elt("div", [lines], null, "position: relative")
+	  // Set to the height of the document, allowing scrolling.
+	  d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
+	  d.sizerWidth = null
+	  // Behavior of elts with overflow: auto and padding is
+	  // inconsistent across browsers. This is used to ensure the
+	  // scrollable area is big enough.
+	  d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
+	  // Will contain the gutters, if any.
+	  d.gutters = elt("div", null, "CodeMirror-gutters")
+	  d.lineGutter = null
+	  // Actual scrollable element.
+	  d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
+	  d.scroller.setAttribute("tabIndex", "-1")
+	  // The element in which the editor lives.
+	  d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")
+
+	  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+	  if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
+	  if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true }
+
+	  if (place) {
+	    if (place.appendChild) { place.appendChild(d.wrapper) }
+	    else { place(d.wrapper) }
+	  }
+
+	  // Current rendered range (may be bigger than the view window).
+	  d.viewFrom = d.viewTo = doc.first
+	  d.reportedViewFrom = d.reportedViewTo = doc.first
+	  // Information about the rendered lines.
+	  d.view = []
+	  d.renderedView = null
+	  // Holds info about a single rendered line when it was rendered
+	  // for measurement, while not in view.
+	  d.externalMeasured = null
+	  // Empty space (in pixels) above the view
+	  d.viewOffset = 0
+	  d.lastWrapHeight = d.lastWrapWidth = 0
+	  d.updateLineNumbers = null
+
+	  d.nativeBarWidth = d.barHeight = d.barWidth = 0
+	  d.scrollbarsClipped = false
+
+	  // Used to only resize the line number gutter when necessary (when
+	  // the amount of lines crosses a boundary that makes its width change)
+	  d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
+	  // Set to true when a non-horizontal-scrolling line widget is
+	  // added. As an optimization, line widget aligning is skipped when
+	  // this is false.
+	  d.alignWidgets = false
+
+	  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+
+	  // Tracks the maximum line length so that the horizontal scrollbar
+	  // can be kept static when scrolling.
+	  d.maxLine = null
+	  d.maxLineLength = 0
+	  d.maxLineChanged = false
+
+	  // Used for measuring wheel scrolling granularity
+	  d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null
+
+	  // True when shift is held down.
+	  d.shift = false
+
+	  // Used to track whether anything happened since the context menu
+	  // was opened.
+	  d.selForContextMenu = null
+
+	  d.activeTouch = null
+
+	  input.init(d)
+	}
+
+	// Find the line object corresponding to the given line number.
+	function getLine(doc, n) {
+	  n -= doc.first
+	  if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+	  var chunk = doc
+	  while (!chunk.lines) {
+	    for (var i = 0;; ++i) {
+	      var child = chunk.children[i], sz = child.chunkSize()
+	      if (n < sz) { chunk = child; break }
+	      n -= sz
+	    }
+	  }
+	  return chunk.lines[n]
+	}
+
+	// Get the part of a document between two positions, as an array of
+	// strings.
+	function getBetween(doc, start, end) {
+	  var out = [], n = start.line
+	  doc.iter(start.line, end.line + 1, function (line) {
+	    var text = line.text
+	    if (n == end.line) { text = text.slice(0, end.ch) }
+	    if (n == start.line) { text = text.slice(start.ch) }
+	    out.push(text)
+	    ++n
+	  })
+	  return out
+	}
+	// Get the lines between from and to, as array of strings.
+	function getLines(doc, from, to) {
+	  var out = []
+	  doc.iter(from, to, function (line) { out.push(line.text) }) // iter aborts when callback returns truthy value
+	  return out
+	}
+
+	// Update the height of a line, propagating the height change
+	// upwards to parent nodes.
+	function updateLineHeight(line, height) {
+	  var diff = height - line.height
+	  if (diff) { for (var n = line; n; n = n.parent) { n.height += diff } }
+	}
+
+	// Given a line object, find its line number by walking up through
+	// its parent links.
+	function lineNo(line) {
+	  if (line.parent == null) { return null }
+	  var cur = line.parent, no = indexOf(cur.lines, line)
+	  for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+	    for (var i = 0;; ++i) {
+	      if (chunk.children[i] == cur) { break }
+	      no += chunk.children[i].chunkSize()
+	    }
+	  }
+	  return no + cur.first
+	}
+
+	// Find the line at the given vertical position, using the height
+	// information in the document tree.
+	function lineAtHeight(chunk, h) {
+	  var n = chunk.first
+	  outer: do {
+	    for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+	      var child = chunk.children[i$1], ch = child.height
+	      if (h < ch) { chunk = child; continue outer }
+	      h -= ch
+	      n += child.chunkSize()
+	    }
+	    return n
+	  } while (!chunk.lines)
+	  var i = 0
+	  for (; i < chunk.lines.length; ++i) {
+	    var line = chunk.lines[i], lh = line.height
+	    if (h < lh) { break }
+	    h -= lh
+	  }
+	  return n + i
+	}
+
+	function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+	function lineNumberFor(options, i) {
+	  return String(options.lineNumberFormatter(i + options.firstLineNumber))
+	}
+
+	// A Pos instance represents a position within the text.
+	function Pos(line, ch, sticky) {
+	  if ( sticky === void 0 ) sticky = null;
+
+	  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+	  this.line = line
+	  this.ch = ch
+	  this.sticky = sticky
+	}
+
+	// Compare two positions, return 0 if they are the same, a negative
+	// number when a is less, and a positive number otherwise.
+	function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+	function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+	function copyPos(x) {return Pos(x.line, x.ch)}
+	function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+	function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+	// Most of the external API clips given positions to make sure they
+	// actually exist within the document.
+	function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+	function clipPos(doc, pos) {
+	  if (pos.line < doc.first) { return Pos(doc.first, 0) }
+	  var last = doc.first + doc.size - 1
+	  if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+	  return clipToLen(pos, getLine(doc, pos.line).text.length)
+	}
+	function clipToLen(pos, linelen) {
+	  var ch = pos.ch
+	  if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+	  else if (ch < 0) { return Pos(pos.line, 0) }
+	  else { return pos }
+	}
+	function clipPosArray(doc, array) {
+	  var out = []
+	  for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]) }
+	  return out
+	}
+
+	// Optimize some code when these features are not used.
+	var sawReadOnlySpans = false;
+	var sawCollapsedSpans = false;
+	function seeReadOnlySpans() {
+	  sawReadOnlySpans = true
+	}
+
+	function seeCollapsedSpans() {
+	  sawCollapsedSpans = true
+	}
+
+	// TEXTMARKER SPANS
+
+	function MarkedSpan(marker, from, to) {
+	  this.marker = marker
+	  this.from = from; this.to = to
+	}
+
+	// Search an array of spans for a span matching the given marker.
+	function getMarkedSpanFor(spans, marker) {
+	  if (spans) { for (var i = 0; i < spans.length; ++i) {
+	    var span = spans[i]
+	    if (span.marker == marker) { return span }
+	  } }
+	}
+	// Remove a span from an array, returning undefined if no spans are
+	// left (we don't store arrays for lines without spans).
+	function removeMarkedSpan(spans, span) {
+	  var r
+	  for (var i = 0; i < spans.length; ++i)
+	    { if (spans[i] != span) { (r || (r = [])).push(spans[i]) } }
+	  return r
+	}
+	// Add a span to a line.
+	function addMarkedSpan(line, span) {
+	  line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]
+	  span.marker.attachLine(line)
+	}
+
+	// Used for the algorithm that adjusts markers for a change in the
+	// document. These functions cut an array of spans at a given
+	// character position, returning an array of remaining chunks (or
+	// undefined if nothing remains).
+	function markedSpansBefore(old, startCh, isInsert) {
+	  var nw
+	  if (old) { for (var i = 0; i < old.length; ++i) {
+	    var span = old[i], marker = span.marker
+	    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh)
+	    if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+	      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
+	      ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to))
+	    }
+	  } }
+	  return nw
+	}
+	function markedSpansAfter(old, endCh, isInsert) {
+	  var nw
+	  if (old) { for (var i = 0; i < old.length; ++i) {
+	    var span = old[i], marker = span.marker
+	    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh)
+	    if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+	      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
+	      ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+	                                            span.to == null ? null : span.to - endCh))
+	    }
+	  } }
+	  return nw
+	}
+
+	// Given a change object, compute the new set of marker spans that
+	// cover the line in which the change took place. Removes spans
+	// entirely within the change, reconnects spans belonging to the
+	// same marker that appear on both sides of the change, and cuts off
+	// spans partially within the change. Returns an array of span
+	// arrays with one element for each line in (after) the change.
+	function stretchSpansOverChange(doc, change) {
+	  if (change.full) { return null }
+	  var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans
+	  var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans
+	  if (!oldFirst && !oldLast) { return null }
+
+	  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0
+	  // Get the spans that 'stick out' on both sides
+	  var first = markedSpansBefore(oldFirst, startCh, isInsert)
+	  var last = markedSpansAfter(oldLast, endCh, isInsert)
+
+	  // Next, merge those two ends
+	  var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0)
+	  if (first) {
+	    // Fix up .to properties of first
+	    for (var i = 0; i < first.length; ++i) {
+	      var span = first[i]
+	      if (span.to == null) {
+	        var found = getMarkedSpanFor(last, span.marker)
+	        if (!found) { span.to = startCh }
+	        else if (sameLine) { span.to = found.to == null ? null : found.to + offset }
+	      }
+	    }
+	  }
+	  if (last) {
+	    // Fix up .from in last (or move them into first in case of sameLine)
+	    for (var i$1 = 0; i$1 < last.length; ++i$1) {
+	      var span$1 = last[i$1]
+	      if (span$1.to != null) { span$1.to += offset }
+	      if (span$1.from == null) {
+	        var found$1 = getMarkedSpanFor(first, span$1.marker)
+	        if (!found$1) {
+	          span$1.from = offset
+	          if (sameLine) { (first || (first = [])).push(span$1) }
+	        }
+	      } else {
+	        span$1.from += offset
+	        if (sameLine) { (first || (first = [])).push(span$1) }
+	      }
+	    }
+	  }
+	  // Make sure we didn't create any zero-length spans
+	  if (first) { first = clearEmptySpans(first) }
+	  if (last && last != first) { last = clearEmptySpans(last) }
+
+	  var newMarkers = [first]
+	  if (!sameLine) {
+	    // Fill gap with whole-line-spans
+	    var gap = change.text.length - 2, gapMarkers
+	    if (gap > 0 && first)
+	      { for (var i$2 = 0; i$2 < first.length; ++i$2)
+	        { if (first[i$2].to == null)
+	          { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)) } } }
+	    for (var i$3 = 0; i$3 < gap; ++i$3)
+	      { newMarkers.push(gapMarkers) }
+	    newMarkers.push(last)
+	  }
+	  return newMarkers
+	}
+
+	// Remove spans that are empty and don't have a clearWhenEmpty
+	// option of false.
+	function clearEmptySpans(spans) {
+	  for (var i = 0; i < spans.length; ++i) {
+	    var span = spans[i]
+	    if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+	      { spans.splice(i--, 1) }
+	  }
+	  if (!spans.length) { return null }
+	  return spans
+	}
+
+	// Used to 'clip' out readOnly ranges when making a change.
+	function removeReadOnlyRanges(doc, from, to) {
+	  var markers = null
+	  doc.iter(from.line, to.line + 1, function (line) {
+	    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+	      var mark = line.markedSpans[i].marker
+	      if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+	        { (markers || (markers = [])).push(mark) }
+	    } }
+	  })
+	  if (!markers) { return null }
+	  var parts = [{from: from, to: to}]
+	  for (var i = 0; i < markers.length; ++i) {
+	    var mk = markers[i], m = mk.find(0)
+	    for (var j = 0; j < parts.length; ++j) {
+	      var p = parts[j]
+	      if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+	      var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to)
+	      if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+	        { newParts.push({from: p.from, to: m.from}) }
+	      if (dto > 0 || !mk.inclusiveRight && !dto)
+	        { newParts.push({from: m.to, to: p.to}) }
+	      parts.splice.apply(parts, newParts)
+	      j += newParts.length - 3
+	    }
+	  }
+	  return parts
+	}
+
+	// Connect or disconnect spans from a line.
+	function detachMarkedSpans(line) {
+	  var spans = line.markedSpans
+	  if (!spans) { return }
+	  for (var i = 0; i < spans.length; ++i)
+	    { spans[i].marker.detachLine(line) }
+	  line.markedSpans = null
+	}
+	function attachMarkedSpans(line, spans) {
+	  if (!spans) { return }
+	  for (var i = 0; i < spans.length; ++i)
+	    { spans[i].marker.attachLine(line) }
+	  line.markedSpans = spans
+	}
+
+	// Helpers used when computing which overlapping collapsed span
+	// counts as the larger one.
+	function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+	function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+	// Returns a number indicating which of two overlapping collapsed
+	// spans is larger (and thus includes the other). Falls back to
+	// comparing ids when the spans cover exactly the same range.
+	function compareCollapsedMarkers(a, b) {
+	  var lenDiff = a.lines.length - b.lines.length
+	  if (lenDiff != 0) { return lenDiff }
+	  var aPos = a.find(), bPos = b.find()
+	  var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b)
+	  if (fromCmp) { return -fromCmp }
+	  var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b)
+	  if (toCmp) { return toCmp }
+	  return b.id - a.id
+	}
+
+	// Find out whether a line ends or starts in a collapsed span. If
+	// so, return the marker for that span.
+	function collapsedSpanAtSide(line, start) {
+	  var sps = sawCollapsedSpans && line.markedSpans, found
+	  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+	    sp = sps[i]
+	    if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+	        (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+	      { found = sp.marker }
+	  } }
+	  return found
+	}
+	function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+	function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+	// Test whether there exists a collapsed span that partially
+	// overlaps (covers the start or end, but not both) of a new span.
+	// Such overlap is not allowed.
+	function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+	  var line = getLine(doc, lineNo)
+	  var sps = sawCollapsedSpans && line.markedSpans
+	  if (sps) { for (var i = 0; i < sps.length; ++i) {
+	    var sp = sps[i]
+	    if (!sp.marker.collapsed) { continue }
+	    var found = sp.marker.find(0)
+	    var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker)
+	    var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker)
+	    if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+	    if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+	        fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+	      { return true }
+	  } }
+	}
+
+	// A visual line is a line as drawn on the screen. Folding, for
+	// example, can cause multiple logical lines to appear on the same
+	// visual line. This finds the start of the visual line that the
+	// given line is part of (usually that is the line itself).
+	function visualLine(line) {
+	  var merged
+	  while (merged = collapsedSpanAtStart(line))
+	    { line = merged.find(-1, true).line }
+	  return line
+	}
+
+	function visualLineEnd(line) {
+	  var merged
+	  while (merged = collapsedSpanAtEnd(line))
+	    { line = merged.find(1, true).line }
+	  return line
+	}
+
+	// Returns an array of logical lines that continue the visual line
+	// started by the argument, or undefined if there are no such lines.
+	function visualLineContinued(line) {
+	  var merged, lines
+	  while (merged = collapsedSpanAtEnd(line)) {
+	    line = merged.find(1, true).line
+	    ;(lines || (lines = [])).push(line)
+	  }
+	  return lines
+	}
+
+	// Get the line number of the start of the visual line that the
+	// given line number is part of.
+	function visualLineNo(doc, lineN) {
+	  var line = getLine(doc, lineN), vis = visualLine(line)
+	  if (line == vis) { return lineN }
+	  return lineNo(vis)
+	}
+
+	// Get the line number of the start of the next visual line after
+	// the given line.
+	function visualLineEndNo(doc, lineN) {
+	  if (lineN > doc.lastLine()) { return lineN }
+	  var line = getLine(doc, lineN), merged
+	  if (!lineIsHidden(doc, line)) { return lineN }
+	  while (merged = collapsedSpanAtEnd(line))
+	    { line = merged.find(1, true).line }
+	  return lineNo(line) + 1
+	}
+
+	// Compute whether a line is hidden. Lines count as hidden when they
+	// are part of a visual line that starts with another line, or when
+	// they are entirely covered by collapsed, non-widget span.
+	function lineIsHidden(doc, line) {
+	  var sps = sawCollapsedSpans && line.markedSpans
+	  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+	    sp = sps[i]
+	    if (!sp.marker.collapsed) { continue }
+	    if (sp.from == null) { return true }
+	    if (sp.marker.widgetNode) { continue }
+	    if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+	      { return true }
+	  } }
+	}
+	function lineIsHiddenInner(doc, line, span) {
+	  if (span.to == null) {
+	    var end = span.marker.find(1, true)
+	    return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+	  }
+	  if (span.marker.inclusiveRight && span.to == line.text.length)
+	    { return true }
+	  for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+	    sp = line.markedSpans[i]
+	    if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+	        (sp.to == null || sp.to != span.from) &&
+	        (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+	        lineIsHiddenInner(doc, line, sp)) { return true }
+	  }
+	}
+
+	// Find the height above the given line.
+	function heightAtLine(lineObj) {
+	  lineObj = visualLine(lineObj)
+
+	  var h = 0, chunk = lineObj.parent
+	  for (var i = 0; i < chunk.lines.length; ++i) {
+	    var line = chunk.lines[i]
+	    if (line == lineObj) { break }
+	    else { h += line.height }
+	  }
+	  for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+	    for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+	      var cur = p.children[i$1]
+	      if (cur == chunk) { break }
+	      else { h += cur.height }
+	    }
+	  }
+	  return h
+	}
+
+	// Compute the character length of a line, taking into account
+	// collapsed ranges (see markText) that might hide parts, and join
+	// other lines onto it.
+	function lineLength(line) {
+	  if (line.height == 0) { return 0 }
+	  var len = line.text.length, merged, cur = line
+	  while (merged = collapsedSpanAtStart(cur)) {
+	    var found = merged.find(0, true)
+	    cur = found.from.line
+	    len += found.from.ch - found.to.ch
+	  }
+	  cur = line
+	  while (merged = collapsedSpanAtEnd(cur)) {
+	    var found$1 = merged.find(0, true)
+	    len -= cur.text.length - found$1.from.ch
+	    cur = found$1.to.line
+	    len += cur.text.length - found$1.to.ch
+	  }
+	  return len
+	}
+
+	// Find the longest line in the document.
+	function findMaxLine(cm) {
+	  var d = cm.display, doc = cm.doc
+	  d.maxLine = getLine(doc, doc.first)
+	  d.maxLineLength = lineLength(d.maxLine)
+	  d.maxLineChanged = true
+	  doc.iter(function (line) {
+	    var len = lineLength(line)
+	    if (len > d.maxLineLength) {
+	      d.maxLineLength = len
+	      d.maxLine = line
+	    }
+	  })
+	}
+
+	// BIDI HELPERS
+
+	function iterateBidiSections(order, from, to, f) {
+	  if (!order) { return f(from, to, "ltr") }
+	  var found = false
+	  for (var i = 0; i < order.length; ++i) {
+	    var part = order[i]
+	    if (part.from < to && part.to > from || from == to && part.to == from) {
+	      f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr")
+	      found = true
+	    }
+	  }
+	  if (!found) { f(from, to, "ltr") }
+	}
+
+	var bidiOther = null
+	function getBidiPartAt(order, ch, sticky) {
+	  var found
+	  bidiOther = null
+	  for (var i = 0; i < order.length; ++i) {
+	    var cur = order[i]
+	    if (cur.from < ch && cur.to > ch) { return i }
+	    if (cur.to == ch) {
+	      if (cur.from != cur.to && sticky == "before") { found = i }
+	      else { bidiOther = i }
+	    }
+	    if (cur.from == ch) {
+	      if (cur.from != cur.to && sticky != "before") { found = i }
+	      else { bidiOther = i }
+	    }
+	  }
+	  return found != null ? found : bidiOther
+	}
+
+	// Bidirectional ordering algorithm
+	// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+	// that this (partially) implements.
+
+	// One-char codes used for character types:
+	// L (L):   Left-to-Right
+	// R (R):   Right-to-Left
+	// r (AL):  Right-to-Left Arabic
+	// 1 (EN):  European Number
+	// + (ES):  European Number Separator
+	// % (ET):  European Number Terminator
+	// n (AN):  Arabic Number
+	// , (CS):  Common Number Separator
+	// m (NSM): Non-Spacing Mark
+	// b (BN):  Boundary Neutral
+	// s (B):   Paragraph Separator
+	// t (S):   Segment Separator
+	// w (WS):  Whitespace
+	// N (ON):  Other Neutrals
+
+	// Returns null if characters are ordered as they appear
+	// (left-to-right), or an array of sections ({from, to, level}
+	// objects) in the order in which they occur visually.
+	var bidiOrdering = (function() {
+	  // Character types for codepoints 0 to 0xff
+	  var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"
+	  // Character types for codepoints 0x600 to 0x6f9
+	  var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111"
+	  function charType(code) {
+	    if (code <= 0xf7) { return lowTypes.charAt(code) }
+	    else if (0x590 <= code && code <= 0x5f4) { return "R" }
+	    else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+	    else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+	    else if (0x2000 <= code && code <= 0x200b) { return "w" }
+	    else if (code == 0x200c) { return "b" }
+	    else { return "L" }
+	  }
+
+	  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/
+	  var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/
+
+	  function BidiSpan(level, from, to) {
+	    this.level = level
+	    this.from = from; this.to = to
+	  }
+
+	  return function(str, direction) {
+	    var outerType = direction == "ltr" ? "L" : "R"
+
+	    if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+	    var len = str.length, types = []
+	    for (var i = 0; i < len; ++i)
+	      { types.push(charType(str.charCodeAt(i))) }
+
+	    // W1. Examine each non-spacing mark (NSM) in the level run, and
+	    // change the type of the NSM to the type of the previous
+	    // character. If the NSM is at the start of the level run, it will
+	    // get the type of sor.
+	    for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+	      var type = types[i$1]
+	      if (type == "m") { types[i$1] = prev }
+	      else { prev = type }
+	    }
+
+	    // W2. Search backwards from each instance of a European number
+	    // until the first strong type (R, L, AL, or sor) is found. If an
+	    // AL is found, change the type of the European number to Arabic
+	    // number.
+	    // W3. Change all ALs to R.
+	    for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+	      var type$1 = types[i$2]
+	      if (type$1 == "1" && cur == "r") { types[i$2] = "n" }
+	      else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R" } }
+	    }
+
+	    // W4. A single European separator between two European numbers
+	    // changes to a European number. A single common separator between
+	    // two numbers of the same type changes to that type.
+	    for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+	      var type$2 = types[i$3]
+	      if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1" }
+	      else if (type$2 == "," && prev$1 == types[i$3+1] &&
+	               (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1 }
+	      prev$1 = type$2
+	    }
+
+	    // W5. A sequence of European terminators adjacent to European
+	    // numbers changes to all European numbers.
+	    // W6. Otherwise, separators and terminators change to Other
+	    // Neutral.
+	    for (var i$4 = 0; i$4 < len; ++i$4) {
+	      var type$3 = types[i$4]
+	      if (type$3 == ",") { types[i$4] = "N" }
+	      else if (type$3 == "%") {
+	        var end = (void 0)
+	        for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+	        var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"
+	        for (var j = i$4; j < end; ++j) { types[j] = replace }
+	        i$4 = end - 1
+	      }
+	    }
+
+	    // W7. Search backwards from each instance of a European number
+	    // until the first strong type (R, L, or sor) is found. If an L is
+	    // found, then change the type of the European number to L.
+	    for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+	      var type$4 = types[i$5]
+	      if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L" }
+	      else if (isStrong.test(type$4)) { cur$1 = type$4 }
+	    }
+
+	    // N1. A sequence of neutrals takes the direction of the
+	    // surrounding strong text if the text on both sides has the same
+	    // direction. European and Arabic numbers act as if they were R in
+	    // terms of their influence on neutrals. Start-of-level-run (sor)
+	    // and end-of-level-run (eor) are used at level run boundaries.
+	    // N2. Any remaining neutrals take the embedding direction.
+	    for (var i$6 = 0; i$6 < len; ++i$6) {
+	      if (isNeutral.test(types[i$6])) {
+	        var end$1 = (void 0)
+	        for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+	        var before = (i$6 ? types[i$6-1] : outerType) == "L"
+	        var after = (end$1 < len ? types[end$1] : outerType) == "L"
+	        var replace$1 = before == after ? (before ? "L" : "R") : outerType
+	        for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1 }
+	        i$6 = end$1 - 1
+	      }
+	    }
+
+	    // Here we depart from the documented algorithm, in order to avoid
+	    // building up an actual levels array. Since there are only three
+	    // levels (0, 1, 2) in an implementation that doesn't take
+	    // explicit embedding into account, we can build up the order on
+	    // the fly, without following the level-based algorithm.
+	    var order = [], m
+	    for (var i$7 = 0; i$7 < len;) {
+	      if (countsAsLeft.test(types[i$7])) {
+	        var start = i$7
+	        for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+	        order.push(new BidiSpan(0, start, i$7))
+	      } else {
+	        var pos = i$7, at = order.length
+	        for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+	        for (var j$2 = pos; j$2 < i$7;) {
+	          if (countsAsNum.test(types[j$2])) {
+	            if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)) }
+	            var nstart = j$2
+	            for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+	            order.splice(at, 0, new BidiSpan(2, nstart, j$2))
+	            pos = j$2
+	          } else { ++j$2 }
+	        }
+	        if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)) }
+	      }
+	    }
+	    if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+	      order[0].from = m[0].length
+	      order.unshift(new BidiSpan(0, 0, m[0].length))
+	    }
+	    if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+	      lst(order).to -= m[0].length
+	      order.push(new BidiSpan(0, len - m[0].length, len))
+	    }
+
+	    return direction == "rtl" ? order.reverse() : order
+	  }
+	})()
+
+	// Get the bidi ordering for the given line (and cache it). Returns
+	// false for lines that are fully left-to-right, and an array of
+	// BidiSpan objects otherwise.
+	function getOrder(line, direction) {
+	  var order = line.order
+	  if (order == null) { order = line.order = bidiOrdering(line.text, direction) }
+	  return order
+	}
+
+	function moveCharLogically(line, ch, dir) {
+	  var target = skipExtendingChars(line.text, ch + dir, dir)
+	  return target < 0 || target > line.text.length ? null : target
+	}
+
+	function moveLogically(line, start, dir) {
+	  var ch = moveCharLogically(line, start.ch, dir)
+	  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+	}
+
+	function endOfLine(visually, cm, lineObj, lineNo, dir) {
+	  if (visually) {
+	    var order = getOrder(lineObj, cm.doc.direction)
+	    if (order) {
+	      var part = dir < 0 ? lst(order) : order[0]
+	      var moveInStorageOrder = (dir < 0) == (part.level == 1)
+	      var sticky = moveInStorageOrder ? "after" : "before"
+	      var ch
+	      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+	      // it could be that the last bidi part is not on the last visual line,
+	      // since visual lines contain content order-consecutive chunks.
+	      // Thus, in rtl, we are looking for the first (content-order) character
+	      // in the rtl chunk that is on the last line (that is, the same line
+	      // as the last (content-order) character).
+	      if (part.level > 0) {
+	        var prep = prepareMeasureForLine(cm, lineObj)
+	        ch = dir < 0 ? lineObj.text.length - 1 : 0
+	        var targetTop = measureCharPrepared(cm, prep, ch).top
+	        ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch)
+	        if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1) }
+	      } else { ch = dir < 0 ? part.to : part.from }
+	      return new Pos(lineNo, ch, sticky)
+	    }
+	  }
+	  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+	}
+
+	function moveVisually(cm, line, start, dir) {
+	  var bidi = getOrder(line, cm.doc.direction)
+	  if (!bidi) { return moveLogically(line, start, dir) }
+	  if (start.ch >= line.text.length) {
+	    start.ch = line.text.length
+	    start.sticky = "before"
+	  } else if (start.ch <= 0) {
+	    start.ch = 0
+	    start.sticky = "after"
+	  }
+	  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos]
+	  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+	    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+	    // nothing interesting happens.
+	    return moveLogically(line, start, dir)
+	  }
+
+	  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); }
+	  var prep
+	  var getWrappedLineExtent = function (ch) {
+	    if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+	    prep = prep || prepareMeasureForLine(cm, line)
+	    return wrappedLineExtentChar(cm, line, prep, ch)
+	  }
+	  var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch)
+
+	  if (cm.doc.direction == "rtl" || part.level == 1) {
+	    var moveInStorageOrder = (part.level == 1) == (dir < 0)
+	    var ch = mv(start, moveInStorageOrder ? 1 : -1)
+	    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+	      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+	      var sticky = moveInStorageOrder ? "before" : "after"
+	      return new Pos(start.line, ch, sticky)
+	    }
+	  }
+
+	  // Case 3: Could not move within this bidi part in this visual line, so leave
+	  // the current bidi part
+
+	  var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+	    var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+	      ? new Pos(start.line, mv(ch, 1), "before")
+	      : new Pos(start.line, ch, "after"); }
+
+	    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+	      var part = bidi[partPos]
+	      var moveInStorageOrder = (dir > 0) == (part.level != 1)
+	      var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1)
+	      if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+	      ch = moveInStorageOrder ? part.from : mv(part.to, -1)
+	      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+	    }
+	  }
+
+	  // Case 3a: Look for other bidi parts on the same visual line
+	  var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent)
+	  if (res) { return res }
+
+	  // Case 3b: Look for other bidi parts on the next visual line
+	  var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1)
+	  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+	    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh))
+	    if (res) { return res }
+	  }
+
+	  // Case 4: Nowhere to move
+	  return null
+	}
+
+	// EVENT HANDLING
+
+	// Lightweight event framework. on/off also work on DOM nodes,
+	// registering native DOM handlers.
+
+	var noHandlers = []
+
+	var on = function(emitter, type, f) {
+	  if (emitter.addEventListener) {
+	    emitter.addEventListener(type, f, false)
+	  } else if (emitter.attachEvent) {
+	    emitter.attachEvent("on" + type, f)
+	  } else {
+	    var map = emitter._handlers || (emitter._handlers = {})
+	    map[type] = (map[type] || noHandlers).concat(f)
+	  }
+	}
+
+	function getHandlers(emitter, type) {
+	  return emitter._handlers && emitter._handlers[type] || noHandlers
+	}
+
+	function off(emitter, type, f) {
+	  if (emitter.removeEventListener) {
+	    emitter.removeEventListener(type, f, false)
+	  } else if (emitter.detachEvent) {
+	    emitter.detachEvent("on" + type, f)
+	  } else {
+	    var map = emitter._handlers, arr = map && map[type]
+	    if (arr) {
+	      var index = indexOf(arr, f)
+	      if (index > -1)
+	        { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)) }
+	    }
+	  }
+	}
+
+	function signal(emitter, type /*, values...*/) {
+	  var handlers = getHandlers(emitter, type)
+	  if (!handlers.length) { return }
+	  var args = Array.prototype.slice.call(arguments, 2)
+	  for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args) }
+	}
+
+	// The DOM events that CodeMirror handles can be overridden by
+	// registering a (non-DOM) handler on the editor for the event name,
+	// and preventDefault-ing the event in that handler.
+	function signalDOMEvent(cm, e, override) {
+	  if (typeof e == "string")
+	    { e = {type: e, preventDefault: function() { this.defaultPrevented = true }} }
+	  signal(cm, override || e.type, cm, e)
+	  return e_defaultPrevented(e) || e.codemirrorIgnore
+	}
+
+	function signalCursorActivity(cm) {
+	  var arr = cm._handlers && cm._handlers.cursorActivity
+	  if (!arr) { return }
+	  var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = [])
+	  for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+	    { set.push(arr[i]) } }
+	}
+
+	function hasHandler(emitter, type) {
+	  return getHandlers(emitter, type).length > 0
+	}
+
+	// Add on and off methods to a constructor's prototype, to make
+	// registering events on such objects more convenient.
+	function eventMixin(ctor) {
+	  ctor.prototype.on = function(type, f) {on(this, type, f)}
+	  ctor.prototype.off = function(type, f) {off(this, type, f)}
+	}
+
+	// Due to the fact that we still support jurassic IE versions, some
+	// compatibility wrappers are needed.
+
+	function e_preventDefault(e) {
+	  if (e.preventDefault) { e.preventDefault() }
+	  else { e.returnValue = false }
+	}
+	function e_stopPropagation(e) {
+	  if (e.stopPropagation) { e.stopPropagation() }
+	  else { e.cancelBubble = true }
+	}
+	function e_defaultPrevented(e) {
+	  return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+	}
+	function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)}
+
+	function e_target(e) {return e.target || e.srcElement}
+	function e_button(e) {
+	  var b = e.which
+	  if (b == null) {
+	    if (e.button & 1) { b = 1 }
+	    else if (e.button & 2) { b = 3 }
+	    else if (e.button & 4) { b = 2 }
+	  }
+	  if (mac && e.ctrlKey && b == 1) { b = 3 }
+	  return b
+	}
+
+	// Detect drag-and-drop
+	var dragAndDrop = function() {
+	  // There is *some* kind of drag-and-drop support in IE6-8, but I
+	  // couldn't get it to work yet.
+	  if (ie && ie_version < 9) { return false }
+	  var div = elt('div')
+	  return "draggable" in div || "dragDrop" in div
+	}()
+
+	var zwspSupported
+	function zeroWidthElement(measure) {
+	  if (zwspSupported == null) {
+	    var test = elt("span", "\u200b")
+	    removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
+	    if (measure.firstChild.offsetHeight != 0)
+	      { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8) }
+	  }
+	  var node = zwspSupported ? elt("span", "\u200b") :
+	    elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
+	  node.setAttribute("cm-text", "")
+	  return node
+	}
+
+	// Feature-detect IE's crummy client rect reporting for bidi text
+	var badBidiRects
+	function hasBadBidiRects(measure) {
+	  if (badBidiRects != null) { return badBidiRects }
+	  var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
+	  var r0 = range(txt, 0, 1).getBoundingClientRect()
+	  var r1 = range(txt, 1, 2).getBoundingClientRect()
+	  removeChildren(measure)
+	  if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+	  return badBidiRects = (r1.right - r0.right < 3)
+	}
+
+	// See if "".split is the broken IE version, if so, provide an
+	// alternative way to split lines.
+	var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+	  var pos = 0, result = [], l = string.length
+	  while (pos <= l) {
+	    var nl = string.indexOf("\n", pos)
+	    if (nl == -1) { nl = string.length }
+	    var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
+	    var rt = line.indexOf("\r")
+	    if (rt != -1) {
+	      result.push(line.slice(0, rt))
+	      pos += rt + 1
 	    } else {
-	      rmClass(cm.display.wrapper, "CodeMirror-wrap");
-	      findMaxLine(cm);
-	    }
-	    estimateLineHeights(cm);
-	    regChange(cm);
-	    clearCaches(cm);
-	    setTimeout(function(){updateScrollbars(cm);}, 100);
-	  }
-
-	  // Returns a function that estimates the height of a line, to use as
-	  // first approximation until the line becomes visible (and is thus
-	  // properly measurable).
-	  function estimateHeight(cm) {
-	    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
-	    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
-	    return function(line) {
-	      if (lineIsHidden(cm.doc, line)) return 0;
-
-	      var widgetsHeight = 0;
-	      if (line.widgets) for (var i = 0; i < line.widgets.length; i++) {
-	        if (line.widgets[i].height) widgetsHeight += line.widgets[i].height;
-	      }
-
-	      if (wrapping)
-	        return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th;
-	      else
-	        return widgetsHeight + th;
-	    };
-	  }
-
-	  function estimateLineHeights(cm) {
-	    var doc = cm.doc, est = estimateHeight(cm);
-	    doc.iter(function(line) {
-	      var estHeight = est(line);
-	      if (estHeight != line.height) updateLineHeight(line, estHeight);
-	    });
-	  }
-
-	  function themeChanged(cm) {
-	    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
-	      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
-	    clearCaches(cm);
-	  }
-
-	  function guttersChanged(cm) {
-	    updateGutters(cm);
-	    regChange(cm);
-	    setTimeout(function(){alignHorizontally(cm);}, 20);
-	  }
-
-	  // Rebuild the gutter elements, ensure the margin to the left of the
-	  // code matches their width.
-	  function updateGutters(cm) {
-	    var gutters = cm.display.gutters, specs = cm.options.gutters;
-	    removeChildren(gutters);
-	    for (var i = 0; i < specs.length; ++i) {
-	      var gutterClass = specs[i];
-	      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
-	      if (gutterClass == "CodeMirror-linenumbers") {
-	        cm.display.lineGutter = gElt;
-	        gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
-	      }
-	    }
-	    gutters.style.display = i ? "" : "none";
-	    updateGutterSpace(cm);
-	  }
-
-	  function updateGutterSpace(cm) {
-	    var width = cm.display.gutters.offsetWidth;
-	    cm.display.sizer.style.marginLeft = width + "px";
-	  }
-
-	  // Compute the character length of a line, taking into account
-	  // collapsed ranges (see markText) that might hide parts, and join
-	  // other lines onto it.
-	  function lineLength(line) {
-	    if (line.height == 0) return 0;
-	    var len = line.text.length, merged, cur = line;
-	    while (merged = collapsedSpanAtStart(cur)) {
-	      var found = merged.find(0, true);
-	      cur = found.from.line;
-	      len += found.from.ch - found.to.ch;
-	    }
-	    cur = line;
-	    while (merged = collapsedSpanAtEnd(cur)) {
-	      var found = merged.find(0, true);
-	      len -= cur.text.length - found.from.ch;
-	      cur = found.to.line;
-	      len += cur.text.length - found.to.ch;
-	    }
-	    return len;
-	  }
-
-	  // Find the longest line in the document.
-	  function findMaxLine(cm) {
-	    var d = cm.display, doc = cm.doc;
-	    d.maxLine = getLine(doc, doc.first);
-	    d.maxLineLength = lineLength(d.maxLine);
-	    d.maxLineChanged = true;
-	    doc.iter(function(line) {
-	      var len = lineLength(line);
-	      if (len > d.maxLineLength) {
-	        d.maxLineLength = len;
-	        d.maxLine = line;
-	      }
-	    });
-	  }
-
-	  // Make sure the gutters options contains the element
-	  // "CodeMirror-linenumbers" when the lineNumbers option is true.
-	  function setGuttersForLineNumbers(options) {
-	    var found = indexOf(options.gutters, "CodeMirror-linenumbers");
-	    if (found == -1 && options.lineNumbers) {
-	      options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
-	    } else if (found > -1 && !options.lineNumbers) {
-	      options.gutters = options.gutters.slice(0);
-	      options.gutters.splice(found, 1);
-	    }
-	  }
-
-	  // SCROLLBARS
-
-	  // Prepare DOM reads needed to update the scrollbars. Done in one
-	  // shot to minimize update/measure roundtrips.
-	  function measureForScrollbars(cm) {
-	    var d = cm.display, gutterW = d.gutters.offsetWidth;
-	    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
-	    return {
-	      clientHeight: d.scroller.clientHeight,
-	      viewHeight: d.wrapper.clientHeight,
-	      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
-	      viewWidth: d.wrapper.clientWidth,
-	      barLeft: cm.options.fixedGutter ? gutterW : 0,
-	      docHeight: docH,
-	      scrollHeight: docH + scrollGap(cm) + d.barHeight,
-	      nativeBarWidth: d.nativeBarWidth,
-	      gutterWidth: gutterW
-	    };
-	  }
-
-	  function NativeScrollbars(place, scroll, cm) {
-	    this.cm = cm;
-	    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
-	    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
-	    place(vert); place(horiz);
-
-	    on(vert, "scroll", function() {
-	      if (vert.clientHeight) scroll(vert.scrollTop, "vertical");
-	    });
-	    on(horiz, "scroll", function() {
-	      if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal");
-	    });
-
-	    this.checkedZeroWidth = false;
-	    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
-	    if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px";
-	  }
-
-	  NativeScrollbars.prototype = copyObj({
-	    update: function(measure) {
-	      var needsH = measure.scrollWidth > measure.clientWidth + 1;
-	      var needsV = measure.scrollHeight > measure.clientHeight + 1;
-	      var sWidth = measure.nativeBarWidth;
-
-	      if (needsV) {
-	        this.vert.style.display = "block";
-	        this.vert.style.bottom = needsH ? sWidth + "px" : "0";
-	        var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
-	        // A bug in IE8 can cause this value to be negative, so guard it.
-	        this.vert.firstChild.style.height =
-	          Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
-	      } else {
-	        this.vert.style.display = "";
-	        this.vert.firstChild.style.height = "0";
-	      }
-
-	      if (needsH) {
-	        this.horiz.style.display = "block";
-	        this.horiz.style.right = needsV ? sWidth + "px" : "0";
-	        this.horiz.style.left = measure.barLeft + "px";
-	        var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
-	        this.horiz.firstChild.style.width =
-	          (measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
-	      } else {
-	        this.horiz.style.display = "";
-	        this.horiz.firstChild.style.width = "0";
-	      }
-
-	      if (!this.checkedZeroWidth && measure.clientHeight > 0) {
-	        if (sWidth == 0) this.zeroWidthHack();
-	        this.checkedZeroWidth = true;
-	      }
-
-	      return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0};
-	    },
-	    setScrollLeft: function(pos) {
-	      if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos;
-	      if (this.disableHoriz) this.enableZeroWidthBar(this.horiz, this.disableHoriz);
-	    },
-	    setScrollTop: function(pos) {
-	      if (this.vert.scrollTop != pos) this.vert.scrollTop = pos;
-	      if (this.disableVert) this.enableZeroWidthBar(this.vert, this.disableVert);
-	    },
-	    zeroWidthHack: function() {
-	      var w = mac && !mac_geMountainLion ? "12px" : "18px";
-	      this.horiz.style.height = this.vert.style.width = w;
-	      this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
-	      this.disableHoriz = new Delayed;
-	      this.disableVert = new Delayed;
-	    },
-	    enableZeroWidthBar: function(bar, delay) {
-	      bar.style.pointerEvents = "auto";
-	      function maybeDisable() {
-	        // To find out whether the scrollbar is still visible, we
-	        // check whether the element under the pixel in the bottom
-	        // left corner of the scrollbar box is the scrollbar box
-	        // itself (when the bar is still visible) or its filler child
-	        // (when the bar is hidden). If it is still visible, we keep
-	        // it enabled, if it's hidden, we disable pointer events.
-	        var box = bar.getBoundingClientRect();
-	        var elt = document.elementFromPoint(box.left + 1, box.bottom - 1);
-	        if (elt != bar) bar.style.pointerEvents = "none";
-	        else delay.set(1000, maybeDisable);
-	      }
-	      delay.set(1000, maybeDisable);
-	    },
-	    clear: function() {
-	      var parent = this.horiz.parentNode;
-	      parent.removeChild(this.horiz);
-	      parent.removeChild(this.vert);
-	    }
-	  }, NativeScrollbars.prototype);
-
-	  function NullScrollbars() {}
-
-	  NullScrollbars.prototype = copyObj({
-	    update: function() { return {bottom: 0, right: 0}; },
-	    setScrollLeft: function() {},
-	    setScrollTop: function() {},
-	    clear: function() {}
-	  }, NullScrollbars.prototype);
-
-	  CodeMirror.scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
-
-	  function initScrollbars(cm) {
-	    if (cm.display.scrollbars) {
-	      cm.display.scrollbars.clear();
-	      if (cm.display.scrollbars.addClass)
-	        rmClass(cm.display.wrapper, cm.display.scrollbars.addClass);
-	    }
-
-	    cm.display.scrollbars = new CodeMirror.scrollbarModel[cm.options.scrollbarStyle](function(node) {
-	      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
-	      // Prevent clicks in the scrollbars from killing focus
-	      on(node, "mousedown", function() {
-	        if (cm.state.focused) setTimeout(function() { cm.display.input.focus(); }, 0);
-	      });
-	      node.setAttribute("cm-not-content", "true");
-	    }, function(pos, axis) {
-	      if (axis == "horizontal") setScrollLeft(cm, pos);
-	      else setScrollTop(cm, pos);
-	    }, cm);
-	    if (cm.display.scrollbars.addClass)
-	      addClass(cm.display.wrapper, cm.display.scrollbars.addClass);
-	  }
-
-	  function updateScrollbars(cm, measure) {
-	    if (!measure) measure = measureForScrollbars(cm);
-	    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
-	    updateScrollbarsInner(cm, measure);
-	    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
-	      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
-	        updateHeightsInViewport(cm);
-	      updateScrollbarsInner(cm, measureForScrollbars(cm));
-	      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
-	    }
-	  }
-
-	  // Re-synchronize the fake scrollbars with the actual size of the
-	  // content.
-	  function updateScrollbarsInner(cm, measure) {
-	    var d = cm.display;
-	    var sizes = d.scrollbars.update(measure);
-
-	    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
-	    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
-	    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
-
-	    if (sizes.right && sizes.bottom) {
-	      d.scrollbarFiller.style.display = "block";
-	      d.scrollbarFiller.style.height = sizes.bottom + "px";
-	      d.scrollbarFiller.style.width = sizes.right + "px";
-	    } else d.scrollbarFiller.style.display = "";
-	    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
-	      d.gutterFiller.style.display = "block";
-	      d.gutterFiller.style.height = sizes.bottom + "px";
-	      d.gutterFiller.style.width = measure.gutterWidth + "px";
-	    } else d.gutterFiller.style.display = "";
-	  }
-
-	  // Compute the lines that are visible in a given viewport (defaults
-	  // the the current scroll position). viewport may contain top,
-	  // height, and ensure (see op.scrollToPos) properties.
-	  function visibleLines(display, doc, viewport) {
-	    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
-	    top = Math.floor(top - paddingTop(display));
-	    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
-
-	    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
-	    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
-	    // forces those lines into the viewport (if possible).
-	    if (viewport && viewport.ensure) {
-	      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
-	      if (ensureFrom < from) {
-	        from = ensureFrom;
-	        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
-	      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
-	        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
-	        to = ensureTo;
-	      }
-	    }
-	    return {from: from, to: Math.max(to, from + 1)};
-	  }
-
-	  // LINE NUMBERS
-
-	  // Re-align line numbers and gutter marks to compensate for
-	  // horizontal scrolling.
-	  function alignHorizontally(cm) {
-	    var display = cm.display, view = display.view;
-	    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
-	    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
-	    var gutterW = display.gutters.offsetWidth, left = comp + "px";
-	    for (var i = 0; i < view.length; i++) if (!view[i].hidden) {
-	      if (cm.options.fixedGutter && view[i].gutter)
-	        view[i].gutter.style.left = left;
-	      var align = view[i].alignable;
-	      if (align) for (var j = 0; j < align.length; j++)
-	        align[j].style.left = left;
-	    }
-	    if (cm.options.fixedGutter)
-	      display.gutters.style.left = (comp + gutterW) + "px";
-	  }
-
-	  // Used to ensure that the line number gutter is still the right
-	  // size for the current document size. Returns true when an update
-	  // is needed.
-	  function maybeUpdateLineNumberWidth(cm) {
-	    if (!cm.options.lineNumbers) return false;
-	    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
-	    if (last.length != display.lineNumChars) {
-	      var test = display.measure.appendChild(elt("div", [elt("div", last)],
-	                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
-	      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
-	      display.lineGutter.style.width = "";
-	      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
-	      display.lineNumWidth = display.lineNumInnerWidth + padding;
-	      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
-	      display.lineGutter.style.width = display.lineNumWidth + "px";
-	      updateGutterSpace(cm);
-	      return true;
-	    }
-	    return false;
-	  }
-
-	  function lineNumberFor(options, i) {
-	    return String(options.lineNumberFormatter(i + options.firstLineNumber));
-	  }
-
-	  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
-	  // but using getBoundingClientRect to get a sub-pixel-accurate
-	  // result.
-	  function compensateForHScroll(display) {
-	    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;
-	  }
-
-	  // DISPLAY DRAWING
-
-	  function DisplayUpdate(cm, viewport, force) {
-	    var display = cm.display;
-
-	    this.viewport = viewport;
-	    // Store some values that we'll need later (but don't want to force a relayout for)
-	    this.visible = visibleLines(display, cm.doc, viewport);
-	    this.editorIsHidden = !display.wrapper.offsetWidth;
-	    this.wrapperHeight = display.wrapper.clientHeight;
-	    this.wrapperWidth = display.wrapper.clientWidth;
-	    this.oldDisplayWidth = displayWidth(cm);
-	    this.force = force;
-	    this.dims = getDimensions(cm);
-	    this.events = [];
-	  }
-
-	  DisplayUpdate.prototype.signal = function(emitter, type) {
-	    if (hasHandler(emitter, type))
-	      this.events.push(arguments);
-	  };
-	  DisplayUpdate.prototype.finish = function() {
-	    for (var i = 0; i < this.events.length; i++)
-	      signal.apply(null, this.events[i]);
-	  };
-
-	  function maybeClipScrollbars(cm) {
-	    var display = cm.display;
-	    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
-	      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
-	      display.heightForcer.style.height = scrollGap(cm) + "px";
-	      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
-	      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
-	      display.scrollbarsClipped = true;
-	    }
-	  }
-
-	  // Does the actual updating of the line display. Bails out
-	  // (returning false) when there is nothing to be done and forced is
-	  // false.
-	  function updateDisplayIfNeeded(cm, update) {
-	    var display = cm.display, doc = cm.doc;
-
-	    if (update.editorIsHidden) {
-	      resetView(cm);
-	      return false;
-	    }
-
-	    // Bail out if the visible area is already rendered and nothing changed.
-	    if (!update.force &&
-	        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
-	        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
-	        display.renderedView == display.view && countDirtyView(cm) == 0)
-	      return false;
-
-	    if (maybeUpdateLineNumberWidth(cm)) {
-	      resetView(cm);
-	      update.dims = getDimensions(cm);
-	    }
-
-	    // Compute a suitable new viewport (from & to)
-	    var end = doc.first + doc.size;
-	    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
-	    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
-	    if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom);
-	    if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo);
-	    if (sawCollapsedSpans) {
-	      from = visualLineNo(cm.doc, from);
-	      to = visualLineEndNo(cm.doc, to);
-	    }
-
-	    var different = from != display.viewFrom || to != display.viewTo ||
-	      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
-	    adjustView(cm, from, to);
-
-	    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
-	    // Position the mover div to align with the current scroll position
-	    cm.display.mover.style.top = display.viewOffset + "px";
-
-	    var toUpdate = countDirtyView(cm);
-	    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
-	        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
-	      return false;
-
-	    // For big changes, we hide the enclosing element during the
-	    // update, since that speeds up the operations on most browsers.
-	    var focused = activeElt();
-	    if (toUpdate > 4) display.lineDiv.style.display = "none";
-	    patchDisplay(cm, display.updateLineNumbers, update.dims);
-	    if (toUpdate > 4) display.lineDiv.style.display = "";
-	    display.renderedView = display.view;
-	    // There might have been a widget with a focused element that got
-	    // hidden or updated, if so re-focus it.
-	    if (focused && activeElt() != focused && focused.offsetHeight) focused.focus();
-
-	    // Prevent selection and cursors from interfering with the scroll
-	    // width and height.
-	    removeChildren(display.cursorDiv);
-	    removeChildren(display.selectionDiv);
-	    display.gutters.style.height = display.sizer.style.minHeight = 0;
-
-	    if (different) {
-	      display.lastWrapHeight = update.wrapperHeight;
-	      display.lastWrapWidth = update.wrapperWidth;
-	      startWorker(cm, 400);
-	    }
-
-	    display.updateLineNumbers = null;
-
-	    return true;
-	  }
-
-	  function postUpdateDisplay(cm, update) {
-	    var viewport = update.viewport;
-
-	    for (var first = true;; first = false) {
-	      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
-	        // Clip forced viewport to actual scrollable area.
-	        if (viewport && viewport.top != null)
-	          viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)};
-	        // Updated line heights might result in the drawn area not
-	        // actually covering the viewport. Keep looping until it does.
-	        update.visible = visibleLines(cm.display, cm.doc, viewport);
-	        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
-	          break;
-	      }
-	      if (!updateDisplayIfNeeded(cm, update)) break;
-	      updateHeightsInViewport(cm);
-	      var barMeasure = measureForScrollbars(cm);
-	      updateSelection(cm);
-	      updateScrollbars(cm, barMeasure);
-	      setDocumentHeight(cm, barMeasure);
-	    }
-
-	    update.signal(cm, "update", cm);
-	    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
-	      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
-	      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
-	    }
-	  }
-
-	  function updateDisplaySimple(cm, viewport) {
-	    var update = new DisplayUpdate(cm, viewport);
-	    if (updateDisplayIfNeeded(cm, update)) {
-	      updateHeightsInViewport(cm);
-	      postUpdateDisplay(cm, update);
-	      var barMeasure = measureForScrollbars(cm);
-	      updateSelection(cm);
-	      updateScrollbars(cm, barMeasure);
-	      setDocumentHeight(cm, barMeasure);
-	      update.finish();
-	    }
-	  }
-
-	  function setDocumentHeight(cm, measure) {
-	    cm.display.sizer.style.minHeight = measure.docHeight + "px";
-	    cm.display.heightForcer.style.top = measure.docHeight + "px";
-	    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
-	  }
-
-	  // Read the actual heights of the rendered lines, and update their
-	  // stored heights to match.
-	  function updateHeightsInViewport(cm) {
-	    var display = cm.display;
-	    var prevBottom = display.lineDiv.offsetTop;
-	    for (var i = 0; i < display.view.length; i++) {
-	      var cur = display.view[i], height;
-	      if (cur.hidden) continue;
-	      if (ie && ie_version < 8) {
-	        var bot = cur.node.offsetTop + cur.node.offsetHeight;
-	        height = bot - prevBottom;
-	        prevBottom = bot;
-	      } else {
-	        var box = cur.node.getBoundingClientRect();
-	        height = box.bottom - box.top;
-	      }
-	      var diff = cur.line.height - height;
-	      if (height < 2) height = textHeight(display);
-	      if (diff > .001 || diff < -.001) {
-	        updateLineHeight(cur.line, height);
-	        updateWidgetHeight(cur.line);
-	        if (cur.rest) for (var j = 0; j < cur.rest.length; j++)
-	          updateWidgetHeight(cur.rest[j]);
-	      }
-	    }
-	  }
-
-	  // Read and store the height of line widgets associated with the
-	  // given line.
-	  function updateWidgetHeight(line) {
-	    if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
-	      line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight;
-	  }
-
-	  // Do a bulk-read of the DOM positions and sizes needed to draw the
-	  // view, so that we don't interleave reading and writing to the DOM.
-	  function getDimensions(cm) {
-	    var d = cm.display, left = {}, width = {};
-	    var gutterLeft = d.gutters.clientLeft;
-	    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
-	      left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
-	      width[cm.options.gutters[i]] = n.clientWidth;
-	    }
-	    return {fixedPos: compensateForHScroll(d),
-	            gutterTotalWidth: d.gutters.offsetWidth,
-	            gutterLeft: left,
-	            gutterWidth: width,
-	            wrapperWidth: d.wrapper.clientWidth};
-	  }
-
-	  // Sync the actual display DOM structure with display.view, removing
-	  // nodes for lines that are no longer in view, and creating the ones
-	  // that are not there yet, and updating the ones that are out of
-	  // date.
-	  function patchDisplay(cm, updateNumbersFrom, dims) {
-	    var display = cm.display, lineNumbers = cm.options.lineNumbers;
-	    var container = display.lineDiv, cur = container.firstChild;
-
-	    function rm(node) {
-	      var next = node.nextSibling;
-	      // Works around a throw-scroll bug in OS X Webkit
-	      if (webkit && mac && cm.display.currentWheelTarget == node)
-	        node.style.display = "none";
-	      else
-	        node.parentNode.removeChild(node);
-	      return next;
-	    }
-
-	    var view = display.view, lineN = display.viewFrom;
-	    // Loop over the elements in the view, syncing cur (the DOM nodes
-	    // in display.lineDiv) with the view as we go.
-	    for (var i = 0; i < view.length; i++) {
-	      var lineView = view[i];
-	      if (lineView.hidden) {
-	      } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
-	        var node = buildLineElement(cm, lineView, lineN, dims);
-	        container.insertBefore(node, cur);
-	      } else { // Already drawn
-	        while (cur != lineView.node) cur = rm(cur);
-	        var updateNumber = lineNumbers && updateNumbersFrom != null &&
-	          updateNumbersFrom <= lineN && lineView.lineNumber;
-	        if (lineView.changes) {
-	          if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false;
-	          updateLineForChanges(cm, lineView, lineN, dims);
-	        }
-	        if (updateNumber) {
-	          removeChildren(lineView.lineNumber);
-	          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
-	        }
-	        cur = lineView.node.nextSibling;
-	      }
-	      lineN += lineView.size;
-	    }
-	    while (cur) cur = rm(cur);
-	  }
-
-	  // When an aspect of a line changes, a string is added to
-	  // lineView.changes. This updates the relevant part of the line's
-	  // DOM structure.
-	  function updateLineForChanges(cm, lineView, lineN, dims) {
-	    for (var j = 0; j < lineView.changes.length; j++) {
-	      var type = lineView.changes[j];
-	      if (type == "text") updateLineText(cm, lineView);
-	      else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims);
-	      else if (type == "class") updateLineClasses(lineView);
-	      else if (type == "widget") updateLineWidgets(cm, lineView, dims);
-	    }
-	    lineView.changes = null;
-	  }
-
-	  // Lines with gutter elements, widgets or a background class need to
-	  // be wrapped, and have the extra elements added to the wrapper div
-	  function ensureLineWrapped(lineView) {
-	    if (lineView.node == lineView.text) {
-	      lineView.node = elt("div", null, null, "position: relative");
-	      if (lineView.text.parentNode)
-	        lineView.text.parentNode.replaceChild(lineView.node, lineView.text);
-	      lineView.node.appendChild(lineView.text);
-	      if (ie && ie_version < 8) lineView.node.style.zIndex = 2;
-	    }
-	    return lineView.node;
-	  }
-
-	  function updateLineBackground(lineView) {
-	    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
-	    if (cls) cls += " CodeMirror-linebackground";
-	    if (lineView.background) {
-	      if (cls) lineView.background.className = cls;
-	      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
-	    } else if (cls) {
-	      var wrap = ensureLineWrapped(lineView);
-	      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
-	    }
-	  }
-
-	  // Wrapper around buildLineContent which will reuse the structure
-	  // in display.externalMeasured when possible.
-	  function getLineContent(cm, lineView) {
-	    var ext = cm.display.externalMeasured;
-	    if (ext && ext.line == lineView.line) {
-	      cm.display.externalMeasured = null;
-	      lineView.measure = ext.measure;
-	      return ext.built;
-	    }
-	    return buildLineContent(cm, lineView);
-	  }
-
-	  // Redraw the line's text. Interacts with the background and text
-	  // classes because the mode may output tokens that influence these
-	  // classes.
-	  function updateLineText(cm, lineView) {
-	    var cls = lineView.text.className;
-	    var built = getLineContent(cm, lineView);
-	    if (lineView.text == lineView.node) lineView.node = built.pre;
-	    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
-	    lineView.text = built.pre;
-	    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
-	      lineView.bgClass = built.bgClass;
-	      lineView.textClass = built.textClass;
-	      updateLineClasses(lineView);
-	    } else if (cls) {
-	      lineView.text.className = cls;
-	    }
-	  }
-
-	  function updateLineClasses(lineView) {
-	    updateLineBackground(lineView);
-	    if (lineView.line.wrapClass)
-	      ensureLineWrapped(lineView).className = lineView.line.wrapClass;
-	    else if (lineView.node != lineView.text)
-	      lineView.node.className = "";
-	    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
-	    lineView.text.className = textClass || "";
-	  }
-
-	  function updateLineGutter(cm, lineView, lineN, dims) {
-	    if (lineView.gutter) {
-	      lineView.node.removeChild(lineView.gutter);
-	      lineView.gutter = null;
-	    }
-	    if (lineView.gutterBackground) {
-	      lineView.node.removeChild(lineView.gutterBackground);
-	      lineView.gutterBackground = null;
-	    }
-	    if (lineView.line.gutterClass) {
-	      var wrap = ensureLineWrapped(lineView);
-	      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
-	                                      "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
-	                                      "px; width: " + dims.gutterTotalWidth + "px");
-	      wrap.insertBefore(lineView.gutterBackground, lineView.text);
-	    }
-	    var markers = lineView.line.gutterMarkers;
-	    if (cm.options.lineNumbers || markers) {
-	      var wrap = ensureLineWrapped(lineView);
-	      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", "left: " +
-	                                             (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px");
-	      cm.display.input.setUneditable(gutterWrap);
-	      wrap.insertBefore(gutterWrap, lineView.text);
-	      if (lineView.line.gutterClass)
-	        gutterWrap.className += " " + lineView.line.gutterClass;
-	      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
-	        lineView.lineNumber = gutterWrap.appendChild(
-	          elt("div", lineNumberFor(cm.options, lineN),
-	              "CodeMirror-linenumber CodeMirror-gutter-elt",
-	              "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
-	              + cm.display.lineNumInnerWidth + "px"));
-	      if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) {
-	        var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
-	        if (found)
-	          gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
-	                                     dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
-	      }
-	    }
-	  }
-
-	  function updateLineWidgets(cm, lineView, dims) {
-	    if (lineView.alignable) lineView.alignable = null;
-	    for (var node = lineView.node.firstChild, next; node; node = next) {
-	      var next = node.nextSibling;
-	      if (node.className == "CodeMirror-linewidget")
-	        lineView.node.removeChild(node);
-	    }
-	    insertLineWidgets(cm, lineView, dims);
-	  }
-
-	  // Build a line's DOM representation from scratch
-	  function buildLineElement(cm, lineView, lineN, dims) {
-	    var built = getLineContent(cm, lineView);
-	    lineView.text = lineView.node = built.pre;
-	    if (built.bgClass) lineView.bgClass = built.bgClass;
-	    if (built.textClass) lineView.textClass = built.textClass;
-
-	    updateLineClasses(lineView);
-	    updateLineGutter(cm, lineView, lineN, dims);
-	    insertLineWidgets(cm, lineView, dims);
-	    return lineView.node;
-	  }
-
-	  // A lineView may contain multiple logical lines (when merged by
-	  // collapsed spans). The widgets for all of them need to be drawn.
-	  function insertLineWidgets(cm, lineView, dims) {
-	    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
-	    if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
-	      insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false);
-	  }
-
-	  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
-	    if (!line.widgets) return;
-	    var wrap = ensureLineWrapped(lineView);
-	    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
-	      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
-	      if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true");
-	      positionLineWidget(widget, node, lineView, dims);
-	      cm.display.input.setUneditable(node);
-	      if (allowAbove && widget.above)
-	        wrap.insertBefore(node, lineView.gutter || lineView.text);
+	      result.push(line)
+	      pos = nl + 1
+	    }
+	  }
+	  return result
+	} : function (string) { return string.split(/\r\n?|\n/); }
+
+	var hasSelection = window.getSelection ? function (te) {
+	  try { return te.selectionStart != te.selectionEnd }
+	  catch(e) { return false }
+	} : function (te) {
+	  var range
+	  try {range = te.ownerDocument.selection.createRange()}
+	  catch(e) {}
+	  if (!range || range.parentElement() != te) { return false }
+	  return range.compareEndPoints("StartToEnd", range) != 0
+	}
+
+	var hasCopyEvent = (function () {
+	  var e = elt("div")
+	  if ("oncopy" in e) { return true }
+	  e.setAttribute("oncopy", "return;")
+	  return typeof e.oncopy == "function"
+	})()
+
+	var badZoomedRects = null
+	function hasBadZoomedRects(measure) {
+	  if (badZoomedRects != null) { return badZoomedRects }
+	  var node = removeChildrenAndAdd(measure, elt("span", "x"))
+	  var normal = node.getBoundingClientRect()
+	  var fromRange = range(node, 0, 1).getBoundingClientRect()
+	  return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+	}
+
+	var modes = {};
+	var mimeModes = {};
+	// Extra arguments are stored as the mode's dependencies, which is
+	// used by (legacy) mechanisms like loadmode.js to automatically
+	// load a mode. (Preferred mechanism is the require/define calls.)
+	function defineMode(name, mode) {
+	  if (arguments.length > 2)
+	    { mode.dependencies = Array.prototype.slice.call(arguments, 2) }
+	  modes[name] = mode
+	}
+
+	function defineMIME(mime, spec) {
+	  mimeModes[mime] = spec
+	}
+
+	// Given a MIME type, a {name, ...options} config object, or a name
+	// string, return a mode config object.
+	function resolveMode(spec) {
+	  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+	    spec = mimeModes[spec]
+	  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+	    var found = mimeModes[spec.name]
+	    if (typeof found == "string") { found = {name: found} }
+	    spec = createObj(found, spec)
+	    spec.name = found.name
+	  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+	    return resolveMode("application/xml")
+	  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+	    return resolveMode("application/json")
+	  }
+	  if (typeof spec == "string") { return {name: spec} }
+	  else { return spec || {name: "null"} }
+	}
+
+	// Given a mode spec (anything that resolveMode accepts), find and
+	// initialize an actual mode object.
+	function getMode(options, spec) {
+	  spec = resolveMode(spec)
+	  var mfactory = modes[spec.name]
+	  if (!mfactory) { return getMode(options, "text/plain") }
+	  var modeObj = mfactory(options, spec)
+	  if (modeExtensions.hasOwnProperty(spec.name)) {
+	    var exts = modeExtensions[spec.name]
+	    for (var prop in exts) {
+	      if (!exts.hasOwnProperty(prop)) { continue }
+	      if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop] }
+	      modeObj[prop] = exts[prop]
+	    }
+	  }
+	  modeObj.name = spec.name
+	  if (spec.helperType) { modeObj.helperType = spec.helperType }
+	  if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+	    { modeObj[prop$1] = spec.modeProps[prop$1] } }
+
+	  return modeObj
+	}
+
+	// This can be used to attach properties to mode objects from
+	// outside the actual mode definition.
+	var modeExtensions = {}
+	function extendMode(mode, properties) {
+	  var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
+	  copyObj(properties, exts)
+	}
+
+	function copyState(mode, state) {
+	  if (state === true) { return state }
+	  if (mode.copyState) { return mode.copyState(state) }
+	  var nstate = {}
+	  for (var n in state) {
+	    var val = state[n]
+	    if (val instanceof Array) { val = val.concat([]) }
+	    nstate[n] = val
+	  }
+	  return nstate
+	}
+
+	// Given a mode and a state (for that mode), find the inner mode and
+	// state at the position that the state refers to.
+	function innerMode(mode, state) {
+	  var info
+	  while (mode.innerMode) {
+	    info = mode.innerMode(state)
+	    if (!info || info.mode == mode) { break }
+	    state = info.state
+	    mode = info.mode
+	  }
+	  return info || {mode: mode, state: state}
+	}
+
+	function startState(mode, a1, a2) {
+	  return mode.startState ? mode.startState(a1, a2) : true
+	}
+
+	// STRING STREAM
+
+	// Fed to the mode parsers, provides helper functions to make
+	// parsers more succinct.
+
+	var StringStream = function(string, tabSize, lineOracle) {
+	  this.pos = this.start = 0
+	  this.string = string
+	  this.tabSize = tabSize || 8
+	  this.lastColumnPos = this.lastColumnValue = 0
+	  this.lineStart = 0
+	  this.lineOracle = lineOracle
+	};
+
+	StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+	StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+	StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+	StringStream.prototype.next = function () {
+	  if (this.pos < this.string.length)
+	    { return this.string.charAt(this.pos++) }
+	};
+	StringStream.prototype.eat = function (match) {
+	  var ch = this.string.charAt(this.pos)
+	  var ok
+	  if (typeof match == "string") { ok = ch == match }
+	  else { ok = ch && (match.test ? match.test(ch) : match(ch)) }
+	  if (ok) {++this.pos; return ch}
+	};
+	StringStream.prototype.eatWhile = function (match) {
+	  var start = this.pos
+	  while (this.eat(match)){}
+	  return this.pos > start
+	};
+	StringStream.prototype.eatSpace = function () {
+	    var this$1 = this;
+
+	  var start = this.pos
+	  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos }
+	  return this.pos > start
+	};
+	StringStream.prototype.skipToEnd = function () {this.pos = this.string.length};
+	StringStream.prototype.skipTo = function (ch) {
+	  var found = this.string.indexOf(ch, this.pos)
+	  if (found > -1) {this.pos = found; return true}
+	};
+	StringStream.prototype.backUp = function (n) {this.pos -= n};
+	StringStream.prototype.column = function () {
+	  if (this.lastColumnPos < this.start) {
+	    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)
+	    this.lastColumnPos = this.start
+	  }
+	  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+	};
+	StringStream.prototype.indentation = function () {
+	  return countColumn(this.string, null, this.tabSize) -
+	    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+	};
+	StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+	  if (typeof pattern == "string") {
+	    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; }
+	    var substr = this.string.substr(this.pos, pattern.length)
+	    if (cased(substr) == cased(pattern)) {
+	      if (consume !== false) { this.pos += pattern.length }
+	      return true
+	    }
+	  } else {
+	    var match = this.string.slice(this.pos).match(pattern)
+	    if (match && match.index > 0) { return null }
+	    if (match && consume !== false) { this.pos += match[0].length }
+	    return match
+	  }
+	};
+	StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+	StringStream.prototype.hideFirstChars = function (n, inner) {
+	  this.lineStart += n
+	  try { return inner() }
+	  finally { this.lineStart -= n }
+	};
+	StringStream.prototype.lookAhead = function (n) {
+	  var oracle = this.lineOracle
+	  return oracle && oracle.lookAhead(n)
+	};
+
+	var SavedContext = function(state, lookAhead) {
+	  this.state = state
+	  this.lookAhead = lookAhead
+	};
+
+	var Context = function(doc, state, line, lookAhead) {
+	  this.state = state
+	  this.doc = doc
+	  this.line = line
+	  this.maxLookAhead = lookAhead || 0
+	};
+
+	Context.prototype.lookAhead = function (n) {
+	  var line = this.doc.getLine(this.line + n)
+	  if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n }
+	  return line
+	};
+
+	Context.prototype.nextLine = function () {
+	  this.line++
+	  if (this.maxLookAhead > 0) { this.maxLookAhead-- }
+	};
+
+	Context.fromSaved = function (doc, saved, line) {
+	  if (saved instanceof SavedContext)
+	    { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+	  else
+	    { return new Context(doc, copyState(doc.mode, saved), line) }
+	};
+
+	Context.prototype.save = function (copy) {
+	  var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state
+	  return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+	};
+
+
+	// Compute a style array (an array starting with a mode generation
+	// -- for invalidation -- followed by pairs of end positions and
+	// style strings), which is used to highlight the tokens on the
+	// line.
+	function highlightLine(cm, line, context, forceToEnd) {
+	  // A styles array always starts with a number identifying the
+	  // mode/overlays that it is based on (for easy invalidation).
+	  var st = [cm.state.modeGen], lineClasses = {}
+	  // Compute the base array of styles
+	  runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+	          lineClasses, forceToEnd)
+	  var state = context.state
+
+	  // Run overlays, adjust style array.
+	  var loop = function ( o ) {
+	    var overlay = cm.state.overlays[o], i = 1, at = 0
+	    context.state = true
+	    runMode(cm, line.text, overlay.mode, context, function (end, style) {
+	      var start = i
+	      // Ensure there's a token end at the current position, and that i points at it
+	      while (at < end) {
+	        var i_end = st[i]
+	        if (i_end > end)
+	          { st.splice(i, 1, end, st[i+1], i_end) }
+	        i += 2
+	        at = Math.min(end, i_end)
+	      }
+	      if (!style) { return }
+	      if (overlay.opaque) {
+	        st.splice(start, i - start, end, "overlay " + style)
+	        i = start + 2
+	      } else {
+	        for (; start < i; start += 2) {
+	          var cur = st[start+1]
+	          st[start+1] = (cur ? cur + " " : "") + "overlay " + style
+	        }
+	      }
+	    }, lineClasses)
+	  };
+
+	  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+	  context.state = state
+
+	  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+	}
+
+	function getLineStyles(cm, line, updateFrontier) {
+	  if (!line.styles || line.styles[0] != cm.state.modeGen) {
+	    var context = getContextBefore(cm, lineNo(line))
+	    var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state)
+	    var result = highlightLine(cm, line, context)
+	    if (resetState) { context.state = resetState }
+	    line.stateAfter = context.save(!resetState)
+	    line.styles = result.styles
+	    if (result.classes) { line.styleClasses = result.classes }
+	    else if (line.styleClasses) { line.styleClasses = null }
+	    if (updateFrontier === cm.doc.highlightFrontier)
+	      { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier) }
+	  }
+	  return line.styles
+	}
+
+	function getContextBefore(cm, n, precise) {
+	  var doc = cm.doc, display = cm.display
+	  if (!doc.mode.startState) { return new Context(doc, true, n) }
+	  var start = findStartLine(cm, n, precise)
+	  var saved = start > doc.first && getLine(doc, start - 1).stateAfter
+	  var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start)
+
+	  doc.iter(start, n, function (line) {
+	    processLine(cm, line.text, context)
+	    var pos = context.line
+	    line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null
+	    context.nextLine()
+	  })
+	  if (precise) { doc.modeFrontier = context.line }
+	  return context
+	}
+
+	// Lightweight form of highlight -- proceed over this line and
+	// update state, but don't save a style array. Used for lines that
+	// aren't currently visible.
+	function processLine(cm, text, context, startAt) {
+	  var mode = cm.doc.mode
+	  var stream = new StringStream(text, cm.options.tabSize, context)
+	  stream.start = stream.pos = startAt || 0
+	  if (text == "") { callBlankLine(mode, context.state) }
+	  while (!stream.eol()) {
+	    readToken(mode, stream, context.state)
+	    stream.start = stream.pos
+	  }
+	}
+
+	function callBlankLine(mode, state) {
+	  if (mode.blankLine) { return mode.blankLine(state) }
+	  if (!mode.innerMode) { return }
+	  var inner = innerMode(mode, state)
+	  if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+	}
+
+	function readToken(mode, stream, state, inner) {
+	  for (var i = 0; i < 10; i++) {
+	    if (inner) { inner[0] = innerMode(mode, state).mode }
+	    var style = mode.token(stream, state)
+	    if (stream.pos > stream.start) { return style }
+	  }
+	  throw new Error("Mode " + mode.name + " failed to advance stream.")
+	}
+
+	var Token = function(stream, type, state) {
+	  this.start = stream.start; this.end = stream.pos
+	  this.string = stream.current()
+	  this.type = type || null
+	  this.state = state
+	};
+
+	// Utility for getTokenAt and getLineTokens
+	function takeToken(cm, pos, precise, asArray) {
+	  var doc = cm.doc, mode = doc.mode, style
+	  pos = clipPos(doc, pos)
+	  var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise)
+	  var stream = new StringStream(line.text, cm.options.tabSize, context), tokens
+	  if (asArray) { tokens = [] }
+	  while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+	    stream.start = stream.pos
+	    style = readToken(mode, stream, context.state)
+	    if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))) }
+	  }
+	  return asArray ? tokens : new Token(stream, style, context.state)
+	}
+
+	function extractLineClasses(type, output) {
+	  if (type) { for (;;) {
+	    var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/)
+	    if (!lineClass) { break }
+	    type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length)
+	    var prop = lineClass[1] ? "bgClass" : "textClass"
+	    if (output[prop] == null)
+	      { output[prop] = lineClass[2] }
+	    else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+	      { output[prop] += " " + lineClass[2] }
+	  } }
+	  return type
+	}
+
+	// Run the given mode's parser over a line, calling f for each token.
+	function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+	  var flattenSpans = mode.flattenSpans
+	  if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans }
+	  var curStart = 0, curStyle = null
+	  var stream = new StringStream(text, cm.options.tabSize, context), style
+	  var inner = cm.options.addModeClass && [null]
+	  if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses) }
+	  while (!stream.eol()) {
+	    if (stream.pos > cm.options.maxHighlightLength) {
+	      flattenSpans = false
+	      if (forceToEnd) { processLine(cm, text, context, stream.pos) }
+	      stream.pos = text.length
+	      style = null
+	    } else {
+	      style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses)
+	    }
+	    if (inner) {
+	      var mName = inner[0].name
+	      if (mName) { style = "m-" + (style ? mName + " " + style : mName) }
+	    }
+	    if (!flattenSpans || curStyle != style) {
+	      while (curStart < stream.start) {
+	        curStart = Math.min(stream.start, curStart + 5000)
+	        f(curStart, curStyle)
+	      }
+	      curStyle = style
+	    }
+	    stream.start = stream.pos
+	  }
+	  while (curStart < stream.pos) {
+	    // Webkit seems to refuse to render text nodes longer than 57444
+	    // characters, and returns inaccurate measurements in nodes
+	    // starting around 5000 chars.
+	    var pos = Math.min(stream.pos, curStart + 5000)
+	    f(pos, curStyle)
+	    curStart = pos
+	  }
+	}
+
+	// Finds the line to start with when starting a parse. Tries to
+	// find a line with a stateAfter, so that it can start with a
+	// valid state. If that fails, it returns the line with the
+	// smallest indentation, which tends to need the least context to
+	// parse correctly.
+	function findStartLine(cm, n, precise) {
+	  var minindent, minline, doc = cm.doc
+	  var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100)
+	  for (var search = n; search > lim; --search) {
+	    if (search <= doc.first) { return doc.first }
+	    var line = getLine(doc, search - 1), after = line.stateAfter
+	    if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+	      { return search }
+	    var indented = countColumn(line.text, null, cm.options.tabSize)
+	    if (minline == null || minindent > indented) {
+	      minline = search - 1
+	      minindent = indented
+	    }
+	  }
+	  return minline
+	}
+
+	function retreatFrontier(doc, n) {
+	  doc.modeFrontier = Math.min(doc.modeFrontier, n)
+	  if (doc.highlightFrontier < n - 10) { return }
+	  var start = doc.first
+	  for (var line = n - 1; line > start; line--) {
+	    var saved = getLine(doc, line).stateAfter
+	    // change is on 3
+	    // state on line 1 looked ahead 2 -- so saw 3
+	    // test 1 + 2 < 3 should cover this
+	    if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+	      start = line + 1
+	      break
+	    }
+	  }
+	  doc.highlightFrontier = Math.min(doc.highlightFrontier, start)
+	}
+
+	// LINE DATA STRUCTURE
+
+	// Line objects. These hold state related to a line, including
+	// highlighting info (the styles array).
+	var Line = function(text, markedSpans, estimateHeight) {
+	  this.text = text
+	  attachMarkedSpans(this, markedSpans)
+	  this.height = estimateHeight ? estimateHeight(this) : 1
+	};
+
+	Line.prototype.lineNo = function () { return lineNo(this) };
+	eventMixin(Line)
+
+	// Change the content (text, markers) of a line. Automatically
+	// invalidates cached information and tries to re-estimate the
+	// line's height.
+	function updateLine(line, text, markedSpans, estimateHeight) {
+	  line.text = text
+	  if (line.stateAfter) { line.stateAfter = null }
+	  if (line.styles) { line.styles = null }
+	  if (line.order != null) { line.order = null }
+	  detachMarkedSpans(line)
+	  attachMarkedSpans(line, markedSpans)
+	  var estHeight = estimateHeight ? estimateHeight(line) : 1
+	  if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+	}
+
+	// Detach a line from the document tree and its markers.
+	function cleanUpLine(line) {
+	  line.parent = null
+	  detachMarkedSpans(line)
+	}
+
+	// Convert a style as returned by a mode (either null, or a string
+	// containing one or more styles) to a CSS style. This is cached,
+	// and also looks for line-wide styles.
+	var styleToClassCache = {};
+	var styleToClassCacheWithMode = {};
+	function interpretTokenStyle(style, options) {
+	  if (!style || /^\s*$/.test(style)) { return null }
+	  var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
+	  return cache[style] ||
+	    (cache[style] = style.replace(/\S+/g, "cm-$&"))
+	}
+
+	// Render the DOM representation of the text of a line. Also builds
+	// up a 'line map', which points at the DOM nodes that represent
+	// specific stretches of text, and is used by the measuring code.
+	// The returned object contains the DOM node, this map, and
+	// information about line-wide styles that were set by the mode.
+	function buildLineContent(cm, lineView) {
+	  // The padding-right forces the element to have a 'border', which
+	  // is needed on Webkit to be able to get line-level bounding
+	  // rectangles for it (in measureChar).
+	  var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null)
+	  var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+	                 col: 0, pos: 0, cm: cm,
+	                 trailingSpace: false,
+	                 splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}
+	  lineView.measure = {}
+
+	  // Iterate over the logical lines that make up this visual line.
+	  for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+	    var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0)
+	    builder.pos = 0
+	    builder.addToken = buildToken
+	    // Optionally wire in some hacks into the token-rendering
+	    // algorithm, to deal with browser quirks.
+	    if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+	      { builder.addToken = buildTokenBadBidi(builder.addToken, order) }
+	    builder.map = []
+	    var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
+	    insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
+	    if (line.styleClasses) {
+	      if (line.styleClasses.bgClass)
+	        { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "") }
+	      if (line.styleClasses.textClass)
+	        { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "") }
+	    }
+
+	    // Ensure at least a single node is present, for measuring.
+	    if (builder.map.length == 0)
+	      { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))) }
+
+	    // Store the map and a cache object for the current logical line
+	    if (i == 0) {
+	      lineView.measure.map = builder.map
+	      lineView.measure.cache = {}
+	    } else {
+	      ;(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+	      ;(lineView.measure.caches || (lineView.measure.caches = [])).push({})
+	    }
+	  }
+
+	  // See issue #2901
+	  if (webkit) {
+	    var last = builder.content.lastChild
+	    if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+	      { builder.content.className = "cm-tab-wrap-hack" }
+	  }
+
+	  signal(cm, "renderLine", cm, lineView.line, builder.pre)
+	  if (builder.pre.className)
+	    { builder.textClass = joinClasses(builder.pre.className, builder.textClass || "") }
+
+	  return builder
+	}
+
+	function defaultSpecialCharPlaceholder(ch) {
+	  var token = elt("span", "\u2022", "cm-invalidchar")
+	  token.title = "\\u" + ch.charCodeAt(0).toString(16)
+	  token.setAttribute("aria-label", token.title)
+	  return token
+	}
+
+	// Build up the DOM representation for a single token, and add it to
+	// the line map. Takes care to render special characters separately.
+	function buildToken(builder, text, style, startStyle, endStyle, title, css) {
+	  if (!text) { return }
+	  var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
+	  var special = builder.cm.state.specialChars, mustWrap = false
+	  var content
+	  if (!special.test(text)) {
+	    builder.col += text.length
+	    content = document.createTextNode(displayText)
+	    builder.map.push(builder.pos, builder.pos + text.length, content)
+	    if (ie && ie_version < 9) { mustWrap = true }
+	    builder.pos += text.length
+	  } else {
+	    content = document.createDocumentFragment()
+	    var pos = 0
+	    while (true) {
+	      special.lastIndex = pos
+	      var m = special.exec(text)
+	      var skipped = m ? m.index - pos : text.length - pos
+	      if (skipped) {
+	        var txt = document.createTextNode(displayText.slice(pos, pos + skipped))
+	        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])) }
+	        else { content.appendChild(txt) }
+	        builder.map.push(builder.pos, builder.pos + skipped, txt)
+	        builder.col += skipped
+	        builder.pos += skipped
+	      }
+	      if (!m) { break }
+	      pos += skipped + 1
+	      var txt$1 = (void 0)
+	      if (m[0] == "\t") {
+	        var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
+	        txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
+	        txt$1.setAttribute("role", "presentation")
+	        txt$1.setAttribute("cm-text", "\t")
+	        builder.col += tabWidth
+	      } else if (m[0] == "\r" || m[0] == "\n") {
+	        txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
+	        txt$1.setAttribute("cm-text", m[0])
+	        builder.col += 1
+	      } else {
+	        txt$1 = builder.cm.options.specialCharPlaceholder(m[0])
+	        txt$1.setAttribute("cm-text", m[0])
+	        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])) }
+	        else { content.appendChild(txt$1) }
+	        builder.col += 1
+	      }
+	      builder.map.push(builder.pos, builder.pos + 1, txt$1)
+	      builder.pos++
+	    }
+	  }
+	  builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
+	  if (style || startStyle || endStyle || mustWrap || css) {
+	    var fullStyle = style || ""
+	    if (startStyle) { fullStyle += startStyle }
+	    if (endStyle) { fullStyle += endStyle }
+	    var token = elt("span", [content], fullStyle, css)
+	    if (title) { token.title = title }
+	    return builder.content.appendChild(token)
+	  }
+	  builder.content.appendChild(content)
+	}
+
+	function splitSpaces(text, trailingBefore) {
+	  if (text.length > 1 && !/  /.test(text)) { return text }
+	  var spaceBefore = trailingBefore, result = ""
+	  for (var i = 0; i < text.length; i++) {
+	    var ch = text.charAt(i)
+	    if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+	      { ch = "\u00a0" }
+	    result += ch
+	    spaceBefore = ch == " "
+	  }
+	  return result
+	}
+
+	// Work around nonsense dimensions being reported for stretches of
+	// right-to-left text.
+	function buildTokenBadBidi(inner, order) {
+	  return function (builder, text, style, startStyle, endStyle, title, css) {
+	    style = style ? style + " cm-force-border" : "cm-force-border"
+	    var start = builder.pos, end = start + text.length
+	    for (;;) {
+	      // Find the part that overlaps with the start of this text
+	      var part = (void 0)
+	      for (var i = 0; i < order.length; i++) {
+	        part = order[i]
+	        if (part.to > start && part.from <= start) { break }
+	      }
+	      if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
+	      inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css)
+	      startStyle = null
+	      text = text.slice(part.to - start)
+	      start = part.to
+	    }
+	  }
+	}
+
+	function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+	  var widget = !ignoreWidget && marker.widgetNode
+	  if (widget) { builder.map.push(builder.pos, builder.pos + size, widget) }
+	  if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+	    if (!widget)
+	      { widget = builder.content.appendChild(document.createElement("span")) }
+	    widget.setAttribute("cm-marker", marker.id)
+	  }
+	  if (widget) {
+	    builder.cm.display.input.setUneditable(widget)
+	    builder.content.appendChild(widget)
+	  }
+	  builder.pos += size
+	  builder.trailingSpace = false
+	}
+
+	// Outputs a number of spans to make up a line, taking highlighting
+	// and marked text into account.
+	function insertLineContent(line, builder, styles) {
+	  var spans = line.markedSpans, allText = line.text, at = 0
+	  if (!spans) {
+	    for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+	      { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)) }
+	    return
+	  }
+
+	  var len = allText.length, pos = 0, i = 1, text = "", style, css
+	  var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed
+	  for (;;) {
+	    if (nextChange == pos) { // Update current marker set
+	      spanStyle = spanEndStyle = spanStartStyle = title = css = ""
+	      collapsed = null; nextChange = Infinity
+	      var foundBookmarks = [], endStyles = (void 0)
+	      for (var j = 0; j < spans.length; ++j) {
+	        var sp = spans[j], m = sp.marker
+	        if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+	          foundBookmarks.push(m)
+	        } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+	          if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+	            nextChange = sp.to
+	            spanEndStyle = ""
+	          }
+	          if (m.className) { spanStyle += " " + m.className }
+	          if (m.css) { css = (css ? css + ";" : "") + m.css }
+	          if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle }
+	          if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to) }
+	          if (m.title && !title) { title = m.title }
+	          if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+	            { collapsed = sp }
+	        } else if (sp.from > pos && nextChange > sp.from) {
+	          nextChange = sp.from
+	        }
+	      }
+	      if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+	        { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1] } } }
+
+	      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+	        { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]) } }
+	      if (collapsed && (collapsed.from || 0) == pos) {
+	        buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+	                           collapsed.marker, collapsed.from == null)
+	        if (collapsed.to == null) { return }
+	        if (collapsed.to == pos) { collapsed = false }
+	      }
+	    }
+	    if (pos >= len) { break }
+
+	    var upto = Math.min(len, nextChange)
+	    while (true) {
+	      if (text) {
+	        var end = pos + text.length
+	        if (!collapsed) {
+	          var tokenText = end > upto ? text.slice(0, upto - pos) : text
+	          builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+	                           spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css)
+	        }
+	        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+	        pos = end
+	        spanStartStyle = ""
+	      }
+	      text = allText.slice(at, at = styles[i++])
+	      style = interpretTokenStyle(styles[i++], builder.cm.options)
+	    }
+	  }
+	}
+
+
+	// These objects are used to represent the visible (currently drawn)
+	// part of the document. A LineView may correspond to multiple
+	// logical lines, if those are connected by collapsed ranges.
+	function LineView(doc, line, lineN) {
+	  // The starting line
+	  this.line = line
+	  // Continuing lines, if any
+	  this.rest = visualLineContinued(line)
+	  // Number of logical lines in this visual line
+	  this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
+	  this.node = this.text = null
+	  this.hidden = lineIsHidden(doc, line)
+	}
+
+	// Create a range of LineView objects for the given lines.
+	function buildViewArray(cm, from, to) {
+	  var array = [], nextPos
+	  for (var pos = from; pos < to; pos = nextPos) {
+	    var view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
+	    nextPos = pos + view.size
+	    array.push(view)
+	  }
+	  return array
+	}
+
+	var operationGroup = null
+
+	function pushOperation(op) {
+	  if (operationGroup) {
+	    operationGroup.ops.push(op)
+	  } else {
+	    op.ownsGroup = operationGroup = {
+	      ops: [op],
+	      delayedCallbacks: []
+	    }
+	  }
+	}
+
+	function fireCallbacksForOps(group) {
+	  // Calls delayed callbacks and cursorActivity handlers until no
+	  // new ones appear
+	  var callbacks = group.delayedCallbacks, i = 0
+	  do {
+	    for (; i < callbacks.length; i++)
+	      { callbacks[i].call(null) }
+	    for (var j = 0; j < group.ops.length; j++) {
+	      var op = group.ops[j]
+	      if (op.cursorActivityHandlers)
+	        { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+	          { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) } }
+	    }
+	  } while (i < callbacks.length)
+	}
+
+	function finishOperation(op, endCb) {
+	  var group = op.ownsGroup
+	  if (!group) { return }
+
+	  try { fireCallbacksForOps(group) }
+	  finally {
+	    operationGroup = null
+	    endCb(group)
+	  }
+	}
+
+	var orphanDelayedCallbacks = null
+
+	// Often, we want to signal events at a point where we are in the
+	// middle of some work, but don't want the handler to start calling
+	// other methods on the editor, which might be in an inconsistent
+	// state or simply not expect any other events to happen.
+	// signalLater looks whether there are any handlers, and schedules
+	// them to be executed when the last operation ends, or, if no
+	// operation is active, when a timeout fires.
+	function signalLater(emitter, type /*, values...*/) {
+	  var arr = getHandlers(emitter, type)
+	  if (!arr.length) { return }
+	  var args = Array.prototype.slice.call(arguments, 2), list
+	  if (operationGroup) {
+	    list = operationGroup.delayedCallbacks
+	  } else if (orphanDelayedCallbacks) {
+	    list = orphanDelayedCallbacks
+	  } else {
+	    list = orphanDelayedCallbacks = []
+	    setTimeout(fireOrphanDelayed, 0)
+	  }
+	  var loop = function ( i ) {
+	    list.push(function () { return arr[i].apply(null, args); })
+	  };
+
+	  for (var i = 0; i < arr.length; ++i)
+	    loop( i );
+	}
+
+	function fireOrphanDelayed() {
+	  var delayed = orphanDelayedCallbacks
+	  orphanDelayedCallbacks = null
+	  for (var i = 0; i < delayed.length; ++i) { delayed[i]() }
+	}
+
+	// When an aspect of a line changes, a string is added to
+	// lineView.changes. This updates the relevant part of the line's
+	// DOM structure.
+	function updateLineForChanges(cm, lineView, lineN, dims) {
+	  for (var j = 0; j < lineView.changes.length; j++) {
+	    var type = lineView.changes[j]
+	    if (type == "text") { updateLineText(cm, lineView) }
+	    else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims) }
+	    else if (type == "class") { updateLineClasses(cm, lineView) }
+	    else if (type == "widget") { updateLineWidgets(cm, lineView, dims) }
+	  }
+	  lineView.changes = null
+	}
+
+	// Lines with gutter elements, widgets or a background class need to
+	// be wrapped, and have the extra elements added to the wrapper div
+	function ensureLineWrapped(lineView) {
+	  if (lineView.node == lineView.text) {
+	    lineView.node = elt("div", null, null, "position: relative")
+	    if (lineView.text.parentNode)
+	      { lineView.text.parentNode.replaceChild(lineView.node, lineView.text) }
+	    lineView.node.appendChild(lineView.text)
+	    if (ie && ie_version < 8) { lineView.node.style.zIndex = 2 }
+	  }
+	  return lineView.node
+	}
+
+	function updateLineBackground(cm, lineView) {
+	  var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
+	  if (cls) { cls += " CodeMirror-linebackground" }
+	  if (lineView.background) {
+	    if (cls) { lineView.background.className = cls }
+	    else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
+	  } else if (cls) {
+	    var wrap = ensureLineWrapped(lineView)
+	    lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
+	    cm.display.input.setUneditable(lineView.background)
+	  }
+	}
+
+	// Wrapper around buildLineContent which will reuse the structure
+	// in display.externalMeasured when possible.
+	function getLineContent(cm, lineView) {
+	  var ext = cm.display.externalMeasured
+	  if (ext && ext.line == lineView.line) {
+	    cm.display.externalMeasured = null
+	    lineView.measure = ext.measure
+	    return ext.built
+	  }
+	  return buildLineContent(cm, lineView)
+	}
+
+	// Redraw the line's text. Interacts with the background and text
+	// classes because the mode may output tokens that influence these
+	// classes.
+	function updateLineText(cm, lineView) {
+	  var cls = lineView.text.className
+	  var built = getLineContent(cm, lineView)
+	  if (lineView.text == lineView.node) { lineView.node = built.pre }
+	  lineView.text.parentNode.replaceChild(built.pre, lineView.text)
+	  lineView.text = built.pre
+	  if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+	    lineView.bgClass = built.bgClass
+	    lineView.textClass = built.textClass
+	    updateLineClasses(cm, lineView)
+	  } else if (cls) {
+	    lineView.text.className = cls
+	  }
+	}
+
+	function updateLineClasses(cm, lineView) {
+	  updateLineBackground(cm, lineView)
+	  if (lineView.line.wrapClass)
+	    { ensureLineWrapped(lineView).className = lineView.line.wrapClass }
+	  else if (lineView.node != lineView.text)
+	    { lineView.node.className = "" }
+	  var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
+	  lineView.text.className = textClass || ""
+	}
+
+	function updateLineGutter(cm, lineView, lineN, dims) {
+	  if (lineView.gutter) {
+	    lineView.node.removeChild(lineView.gutter)
+	    lineView.gutter = null
+	  }
+	  if (lineView.gutterBackground) {
+	    lineView.node.removeChild(lineView.gutterBackground)
+	    lineView.gutterBackground = null
+	  }
+	  if (lineView.line.gutterClass) {
+	    var wrap = ensureLineWrapped(lineView)
+	    lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+	                                    ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"))
+	    cm.display.input.setUneditable(lineView.gutterBackground)
+	    wrap.insertBefore(lineView.gutterBackground, lineView.text)
+	  }
+	  var markers = lineView.line.gutterMarkers
+	  if (cm.options.lineNumbers || markers) {
+	    var wrap$1 = ensureLineWrapped(lineView)
+	    var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"))
+	    cm.display.input.setUneditable(gutterWrap)
+	    wrap$1.insertBefore(gutterWrap, lineView.text)
+	    if (lineView.line.gutterClass)
+	      { gutterWrap.className += " " + lineView.line.gutterClass }
+	    if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+	      { lineView.lineNumber = gutterWrap.appendChild(
+	        elt("div", lineNumberFor(cm.options, lineN),
+	            "CodeMirror-linenumber CodeMirror-gutter-elt",
+	            ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))) }
+	    if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
+	      var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
+	      if (found)
+	        { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+	                                   ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))) }
+	    } }
+	  }
+	}
+
+	function updateLineWidgets(cm, lineView, dims) {
+	  if (lineView.alignable) { lineView.alignable = null }
+	  for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+	    next = node.nextSibling
+	    if (node.className == "CodeMirror-linewidget")
+	      { lineView.node.removeChild(node) }
+	  }
+	  insertLineWidgets(cm, lineView, dims)
+	}
+
+	// Build a line's DOM representation from scratch
+	function buildLineElement(cm, lineView, lineN, dims) {
+	  var built = getLineContent(cm, lineView)
+	  lineView.text = lineView.node = built.pre
+	  if (built.bgClass) { lineView.bgClass = built.bgClass }
+	  if (built.textClass) { lineView.textClass = built.textClass }
+
+	  updateLineClasses(cm, lineView)
+	  updateLineGutter(cm, lineView, lineN, dims)
+	  insertLineWidgets(cm, lineView, dims)
+	  return lineView.node
+	}
+
+	// A lineView may contain multiple logical lines (when merged by
+	// collapsed spans). The widgets for all of them need to be drawn.
+	function insertLineWidgets(cm, lineView, dims) {
+	  insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
+	  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+	    { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false) } }
+	}
+
+	function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+	  if (!line.widgets) { return }
+	  var wrap = ensureLineWrapped(lineView)
+	  for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+	    var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
+	    if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true") }
+	    positionLineWidget(widget, node, lineView, dims)
+	    cm.display.input.setUneditable(node)
+	    if (allowAbove && widget.above)
+	      { wrap.insertBefore(node, lineView.gutter || lineView.text) }
+	    else
+	      { wrap.appendChild(node) }
+	    signalLater(widget, "redraw")
+	  }
+	}
+
+	function positionLineWidget(widget, node, lineView, dims) {
+	  if (widget.noHScroll) {
+	    ;(lineView.alignable || (lineView.alignable = [])).push(node)
+	    var width = dims.wrapperWidth
+	    node.style.left = dims.fixedPos + "px"
+	    if (!widget.coverGutter) {
+	      width -= dims.gutterTotalWidth
+	      node.style.paddingLeft = dims.gutterTotalWidth + "px"
+	    }
+	    node.style.width = width + "px"
+	  }
+	  if (widget.coverGutter) {
+	    node.style.zIndex = 5
+	    node.style.position = "relative"
+	    if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px" }
+	  }
+	}
+
+	function widgetHeight(widget) {
+	  if (widget.height != null) { return widget.height }
+	  var cm = widget.doc.cm
+	  if (!cm) { return 0 }
+	  if (!contains(document.body, widget.node)) {
+	    var parentStyle = "position: relative;"
+	    if (widget.coverGutter)
+	      { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;" }
+	    if (widget.noHScroll)
+	      { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;" }
+	    removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle))
+	  }
+	  return widget.height = widget.node.parentNode.offsetHeight
+	}
+
+	// Return true when the given mouse event happened in a widget
+	function eventInWidget(display, e) {
+	  for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+	    if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+	        (n.parentNode == display.sizer && n != display.mover))
+	      { return true }
+	  }
+	}
+
+	// POSITION MEASUREMENT
+
+	function paddingTop(display) {return display.lineSpace.offsetTop}
+	function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+	function paddingH(display) {
+	  if (display.cachedPaddingH) { return display.cachedPaddingH }
+	  var e = removeChildrenAndAdd(display.measure, elt("pre", "x"))
+	  var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle
+	  var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}
+	  if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data }
+	  return data
+	}
+
+	function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+	function displayWidth(cm) {
+	  return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+	}
+	function displayHeight(cm) {
+	  return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+	}
+
+	// Ensure the lineView.wrapping.heights array is populated. This is
+	// an array of bottom offsets for the lines that make up a drawn
+	// line. When lineWrapping is on, there might be more than one
+	// height.
+	function ensureLineHeights(cm, lineView, rect) {
+	  var wrapping = cm.options.lineWrapping
+	  var curWidth = wrapping && displayWidth(cm)
+	  if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+	    var heights = lineView.measure.heights = []
+	    if (wrapping) {
+	      lineView.measure.width = curWidth
+	      var rects = lineView.text.firstChild.getClientRects()
+	      for (var i = 0; i < rects.length - 1; i++) {
+	        var cur = rects[i], next = rects[i + 1]
+	        if (Math.abs(cur.bottom - next.bottom) > 2)
+	          { heights.push((cur.bottom + next.top) / 2 - rect.top) }
+	      }
+	    }
+	    heights.push(rect.bottom - rect.top)
+	  }
+	}
+
+	// Find a line map (mapping character offsets to text nodes) and a
+	// measurement cache for the given line number. (A line view might
+	// contain multiple lines when collapsed ranges are present.)
+	function mapFromLineView(lineView, line, lineN) {
+	  if (lineView.line == line)
+	    { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+	  for (var i = 0; i < lineView.rest.length; i++)
+	    { if (lineView.rest[i] == line)
+	      { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+	  for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+	    { if (lineNo(lineView.rest[i$1]) > lineN)
+	      { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+	}
+
+	// Render a line into the hidden node display.externalMeasured. Used
+	// when measurement is needed for a line that's not in the viewport.
+	function updateExternalMeasurement(cm, line) {
+	  line = visualLine(line)
+	  var lineN = lineNo(line)
+	  var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN)
+	  view.lineN = lineN
+	  var built = view.built = buildLineContent(cm, view)
+	  view.text = built.pre
+	  removeChildrenAndAdd(cm.display.lineMeasure, built.pre)
+	  return view
+	}
+
+	// Get a {top, bottom, left, right} box (in line-local coordinates)
+	// for a given character.
+	function measureChar(cm, line, ch, bias) {
+	  return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+	}
+
+	// Find a line view that corresponds to the given line number.
+	function findViewForLine(cm, lineN) {
+	  if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+	    { return cm.display.view[findViewIndex(cm, lineN)] }
+	  var ext = cm.display.externalMeasured
+	  if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+	    { return ext }
+	}
+
+	// Measurement can be split in two steps, the set-up work that
+	// applies to the whole line, and the measurement of the actual
+	// character. Functions like coordsChar, that need to do a lot of
+	// measurements in a row, can thus ensure that the set-up work is
+	// only done once.
+	function prepareMeasureForLine(cm, line) {
+	  var lineN = lineNo(line)
+	  var view = findViewForLine(cm, lineN)
+	  if (view && !view.text) {
+	    view = null
+	  } else if (view && view.changes) {
+	    updateLineForChanges(cm, view, lineN, getDimensions(cm))
+	    cm.curOp.forceUpdate = true
+	  }
+	  if (!view)
+	    { view = updateExternalMeasurement(cm, line) }
+
+	  var info = mapFromLineView(view, line, lineN)
+	  return {
+	    line: line, view: view, rect: null,
+	    map: info.map, cache: info.cache, before: info.before,
+	    hasHeights: false
+	  }
+	}
+
+	// Given a prepared measurement object, measures the position of an
+	// actual character (or fetches it from the cache).
+	function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+	  if (prepared.before) { ch = -1 }
+	  var key = ch + (bias || ""), found
+	  if (prepared.cache.hasOwnProperty(key)) {
+	    found = prepared.cache[key]
+	  } else {
+	    if (!prepared.rect)
+	      { prepared.rect = prepared.view.text.getBoundingClientRect() }
+	    if (!prepared.hasHeights) {
+	      ensureLineHeights(cm, prepared.view, prepared.rect)
+	      prepared.hasHeights = true
+	    }
+	    found = measureCharInner(cm, prepared, ch, bias)
+	    if (!found.bogus) { prepared.cache[key] = found }
+	  }
+	  return {left: found.left, right: found.right,
+	          top: varHeight ? found.rtop : found.top,
+	          bottom: varHeight ? found.rbottom : found.bottom}
+	}
+
+	var nullRect = {left: 0, right: 0, top: 0, bottom: 0}
+
+	function nodeAndOffsetInLineMap(map, ch, bias) {
+	  var node, start, end, collapse, mStart, mEnd
+	  // First, search the line map for the text node corresponding to,
+	  // or closest to, the target character.
+	  for (var i = 0; i < map.length; i += 3) {
+	    mStart = map[i]
+	    mEnd = map[i + 1]
+	    if (ch < mStart) {
+	      start = 0; end = 1
+	      collapse = "left"
+	    } else if (ch < mEnd) {
+	      start = ch - mStart
+	      end = start + 1
+	    } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
+	      end = mEnd - mStart
+	      start = end - 1
+	      if (ch >= mEnd) { collapse = "right" }
+	    }
+	    if (start != null) {
+	      node = map[i + 2]
+	      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+	        { collapse = bias }
+	      if (bias == "left" && start == 0)
+	        { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
+	          node = map[(i -= 3) + 2]
+	          collapse = "left"
+	        } }
+	      if (bias == "right" && start == mEnd - mStart)
+	        { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
+	          node = map[(i += 3) + 2]
+	          collapse = "right"
+	        } }
+	      break
+	    }
+	  }
+	  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+	}
+
+	function getUsefulRect(rects, bias) {
+	  var rect = nullRect
+	  if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+	    if ((rect = rects[i]).left != rect.right) { break }
+	  } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+	    if ((rect = rects[i$1]).left != rect.right) { break }
+	  } }
+	  return rect
+	}
+
+	function measureCharInner(cm, prepared, ch, bias) {
+	  var place = nodeAndOffsetInLineMap(prepared.map, ch, bias)
+	  var node = place.node, start = place.start, end = place.end, collapse = place.collapse
+
+	  var rect
+	  if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+	    for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+	      while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start }
+	      while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end }
+	      if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+	        { rect = node.parentNode.getBoundingClientRect() }
 	      else
-	        wrap.appendChild(node);
-	      signalLater(widget, "redraw");
-	    }
-	  }
-
-	  function positionLineWidget(widget, node, lineView, dims) {
-	    if (widget.noHScroll) {
-	      (lineView.alignable || (lineView.alignable = [])).push(node);
-	      var width = dims.wrapperWidth;
-	      node.style.left = dims.fixedPos + "px";
-	      if (!widget.coverGutter) {
-	        width -= dims.gutterTotalWidth;
-	        node.style.paddingLeft = dims.gutterTotalWidth + "px";
-	      }
-	      node.style.width = width + "px";
-	    }
-	    if (widget.coverGutter) {
-	      node.style.zIndex = 5;
-	      node.style.position = "relative";
-	      if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
-	    }
-	  }
-
-	  // POSITION OBJECT
-
-	  // A Pos instance represents a position within the text.
-	  var Pos = CodeMirror.Pos = function(line, ch) {
-	    if (!(this instanceof Pos)) return new Pos(line, ch);
-	    this.line = line; this.ch = ch;
-	  };
-
-	  // Compare two positions, return 0 if they are the same, a negative
-	  // number when a is less, and a positive number otherwise.
-	  var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; };
-
-	  function copyPos(x) {return Pos(x.line, x.ch);}
-	  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; }
-	  function minPos(a, b) { return cmp(a, b) < 0 ? a : b; }
-
-	  // INPUT HANDLING
-
-	  function ensureFocus(cm) {
-	    if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
-	  }
-
-	  // This will be set to a {lineWise: bool, text: [string]} object, so
-	  // that, when pasting, we know what kind of selections the copied
-	  // text was made out of.
-	  var lastCopied = null;
-
-	  function applyTextInput(cm, inserted, deleted, sel, origin) {
-	    var doc = cm.doc;
-	    cm.display.shift = false;
-	    if (!sel) sel = doc.sel;
-
-	    var paste = cm.state.pasteIncoming || origin == "paste";
-	    var textLines = doc.splitLines(inserted), multiPaste = null
-	    // When pasing N lines into N selections, insert one line per selection
-	    if (paste && sel.ranges.length > 1) {
-	      if (lastCopied && lastCopied.text.join("\n") == inserted) {
-	        if (sel.ranges.length % lastCopied.text.length == 0) {
-	          multiPaste = [];
-	          for (var i = 0; i < lastCopied.text.length; i++)
-	            multiPaste.push(doc.splitLines(lastCopied.text[i]));
-	        }
-	      } else if (textLines.length == sel.ranges.length) {
-	        multiPaste = map(textLines, function(l) { return [l]; });
-	      }
-	    }
-
-	    // Normal behavior is to insert the new text into every selection
-	    for (var i = sel.ranges.length - 1; i >= 0; i--) {
-	      var range = sel.ranges[i];
-	      var from = range.from(), to = range.to();
-	      if (range.empty()) {
-	        if (deleted && deleted > 0) // Handle deletion
-	          from = Pos(from.line, from.ch - deleted);
-	        else if (cm.state.overwrite && !paste) // Handle overwrite
-	          to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length));
-	        else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
-	          from = to = Pos(from.line, 0)
-	      }
-	      var updateInput = cm.curOp.updateInput;
-	      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines,
-	                         origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")};
-	      makeChange(cm.doc, changeEvent);
-	      signalLater(cm, "inputRead", cm, changeEvent);
-	    }
-	    if (inserted && !paste)
-	      triggerElectric(cm, inserted);
-
-	    ensureCursorVisible(cm);
-	    cm.curOp.updateInput = updateInput;
-	    cm.curOp.typing = true;
-	    cm.state.pasteIncoming = cm.state.cutIncoming = false;
-	  }
-
-	  function handlePaste(e, cm) {
-	    var pasted = e.clipboardData && e.clipboardData.getData("text/plain");
-	    if (pasted) {
-	      e.preventDefault();
-	      if (!cm.isReadOnly() && !cm.options.disableInput)
-	        runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); });
-	      return true;
-	    }
-	  }
-
-	  function triggerElectric(cm, inserted) {
-	    // When an 'electric' character is inserted, immediately trigger a reindent
-	    if (!cm.options.electricChars || !cm.options.smartIndent) return;
-	    var sel = cm.doc.sel;
-
-	    for (var i = sel.ranges.length - 1; i >= 0; i--) {
-	      var range = sel.ranges[i];
-	      if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) continue;
-	      var mode = cm.getModeAt(range.head);
-	      var indented = false;
-	      if (mode.electricChars) {
-	        for (var j = 0; j < mode.electricChars.length; j++)
-	          if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
-	            indented = indentLine(cm, range.head.line, "smart");
-	            break;
-	          }
-	      } else if (mode.electricInput) {
-	        if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
-	          indented = indentLine(cm, range.head.line, "smart");
-	      }
-	      if (indented) signalLater(cm, "electricInput", cm, range.head.line);
-	    }
-	  }
-
-	  function copyableRanges(cm) {
-	    var text = [], ranges = [];
-	    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
-	      var line = cm.doc.sel.ranges[i].head.line;
-	      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
-	      ranges.push(lineRange);
-	      text.push(cm.getRange(lineRange.anchor, lineRange.head));
-	    }
-	    return {text: text, ranges: ranges};
-	  }
-
-	  function disableBrowserMagic(field) {
-	    field.setAttribute("autocorrect", "off");
-	    field.setAttribute("autocapitalize", "off");
-	    field.setAttribute("spellcheck", "false");
-	  }
-
-	  // TEXTAREA INPUT STYLE
-
-	  function TextareaInput(cm) {
-	    this.cm = cm;
-	    // See input.poll and input.reset
-	    this.prevInput = "";
-
-	    // Flag that indicates whether we expect input to appear real soon
-	    // now (after some event like 'keypress' or 'input') and are
-	    // polling intensively.
-	    this.pollingFast = false;
-	    // Self-resetting timeout for the poller
-	    this.polling = new Delayed();
-	    // Tracks when input.reset has punted to just putting a short
-	    // string into the textarea instead of the full selection.
-	    this.inaccurateSelection = false;
-	    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
-	    this.hasSelection = false;
-	    this.composing = null;
-	  };
-
-	  function hiddenTextarea() {
-	    var te = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none");
-	    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
-	    // The textarea is kept positioned near the cursor to prevent the
-	    // fact that it'll be scrolled into view on input from scrolling
-	    // our fake cursor out of view. On webkit, when wrap=off, paste is
-	    // very slow. So make the area wide instead.
-	    if (webkit) te.style.width = "1000px";
-	    else te.setAttribute("wrap", "off");
-	    // If border: 0; -- iOS fails to open keyboard (issue #1287)
-	    if (ios) te.style.border = "1px solid black";
-	    disableBrowserMagic(te);
-	    return div;
-	  }
-
-	  TextareaInput.prototype = copyObj({
-	    init: function(display) {
-	      var input = this, cm = this.cm;
-
-	      // Wraps and hides input textarea
-	      var div = this.wrapper = hiddenTextarea();
-	      // The semihidden textarea that is focused when the editor is
-	      // focused, and receives input.
-	      var te = this.textarea = div.firstChild;
-	      display.wrapper.insertBefore(div, display.wrapper.firstChild);
-
-	      // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
-	      if (ios) te.style.width = "0px";
-
-	      on(te, "input", function() {
-	        if (ie && ie_version >= 9 && input.hasSelection) input.hasSelection = null;
-	        input.poll();
-	      });
-
-	      on(te, "paste", function(e) {
-	        if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return
-
-	        cm.state.pasteIncoming = true;
-	        input.fastPoll();
-	      });
-
-	      function prepareCopyCut(e) {
-	        if (signalDOMEvent(cm, e)) return
-	        if (cm.somethingSelected()) {
-	          lastCopied = {lineWise: false, text: cm.getSelections()};
-	          if (input.inaccurateSelection) {
-	            input.prevInput = "";
-	            input.inaccurateSelection = false;
-	            te.value = lastCopied.text.join("\n");
-	            selectInput(te);
-	          }
-	        } else if (!cm.options.lineWiseCopyCut) {
-	          return;
-	        } else {
-	          var ranges = copyableRanges(cm);
-	          lastCopied = {lineWise: true, text: ranges.text};
-	          if (e.type == "cut") {
-	            cm.setSelections(ranges.ranges, null, sel_dontScroll);
-	          } else {
-	            input.prevInput = "";
-	            te.value = ranges.text.join("\n");
-	            selectInput(te);
-	          }
-	        }
-	        if (e.type == "cut") cm.state.cutIncoming = true;
-	      }
-	      on(te, "cut", prepareCopyCut);
-	      on(te, "copy", prepareCopyCut);
-
-	      on(display.scroller, "paste", function(e) {
-	        if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return;
-	        cm.state.pasteIncoming = true;
-	        input.focus();
-	      });
-
-	      // Prevent normal selection in the editor (we handle our own)
-	      on(display.lineSpace, "selectstart", function(e) {
-	        if (!eventInWidget(display, e)) e_preventDefault(e);
-	      });
-
-	      on(te, "compositionstart", function() {
-	        var start = cm.getCursor("from");
-	        if (input.composing) input.composing.range.clear()
-	        input.composing = {
-	          start: start,
-	          range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
-	        };
-	      });
-	      on(te, "compositionend", function() {
-	        if (input.composing) {
-	          input.poll();
-	          input.composing.range.clear();
-	          input.composing = null;
-	        }
-	      });
-	    },
-
-	    prepareSelection: function() {
-	      // Redraw the selection and/or cursor
-	      var cm = this.cm, display = cm.display, doc = cm.doc;
-	      var result = prepareSelection(cm);
-
-	      // Move the hidden textarea near the cursor to prevent scrolling artifacts
-	      if (cm.options.moveInputWithCursor) {
-	        var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
-	        var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
-	        result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
-	                                            headPos.top + lineOff.top - wrapOff.top));
-	        result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
-	                                             headPos.left + lineOff.left - wrapOff.left));
-	      }
-
-	      return result;
-	    },
-
-	    showSelection: function(drawn) {
-	      var cm = this.cm, display = cm.display;
-	      removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
-	      removeChildrenAndAdd(display.selectionDiv, drawn.selection);
-	      if (drawn.teTop != null) {
-	        this.wrapper.style.top = drawn.teTop + "px";
-	        this.wrapper.style.left = drawn.teLeft + "px";
-	      }
-	    },
-
-	    // Reset the input to correspond to the selection (or to be empty,
-	    // when not typing and nothing is selected)
-	    reset: function(typing) {
-	      if (this.contextMenuPending) return;
-	      var minimal, selected, cm = this.cm, doc = cm.doc;
-	      if (cm.somethingSelected()) {
-	        this.prevInput = "";
-	        var range = doc.sel.primary();
-	        minimal = hasCopyEvent &&
-	          (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000);
-	        var content = minimal ? "-" : selected || cm.getSelection();
-	        this.textarea.value = content;
-	        if (cm.state.focused) selectInput(this.textarea);
-	        if (ie && ie_version >= 9) this.hasSelection = content;
-	      } else if (!typing) {
-	        this.prevInput = this.textarea.value = "";
-	        if (ie && ie_version >= 9) this.hasSelection = null;
-	      }
-	      this.inaccurateSelection = minimal;
-	    },
-
-	    getField: function() { return this.textarea; },
-
-	    supportsTouch: function() { return false; },
-
-	    focus: function() {
-	      if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
-	        try { this.textarea.focus(); }
-	        catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
-	      }
-	    },
-
-	    blur: function() { this.textarea.blur(); },
-
-	    resetPosition: function() {
-	      this.wrapper.style.top = this.wrapper.style.left = 0;
-	    },
-
-	    receivedFocus: function() { this.slowPoll(); },
-
-	    // Poll for input changes, using the normal rate of polling. This
-	    // runs as long as the editor is focused.
-	    slowPoll: function() {
-	      var input = this;
-	      if (input.pollingFast) return;
-	      input.polling.set(this.cm.options.pollInterval, function() {
-	        input.poll();
-	        if (input.cm.state.focused) input.slowPoll();
-	      });
-	    },
-
-	    // When an event has just come in that is likely to add or change
-	    // something in the input textarea, we poll faster, to ensure that
-	    // the change appears on the screen quickly.
-	    fastPoll: function() {
-	      var missed = false, input = this;
-	      input.pollingFast = true;
-	      function p() {
-	        var changed = input.poll();
-	        if (!changed && !missed) {missed = true; input.polling.set(60, p);}
-	        else {input.pollingFast = false; input.slowPoll();}
-	      }
-	      input.polling.set(20, p);
-	    },
-
-	    // Read input from the textarea, and update the document to match.
-	    // When something is selected, it is present in the textarea, and
-	    // selected (unless it is huge, in which case a placeholder is
-	    // used). When nothing is selected, the cursor sits after previously
-	    // seen text (can be empty), which is stored in prevInput (we must
-	    // not reset the textarea when typing, because that breaks IME).
-	    poll: function() {
-	      var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
-	      // Since this is called a *lot*, try to bail out as cheaply as
-	      // possible when it is clear that nothing happened. hasSelection
-	      // will be the case when there is a lot of text in the textarea,
-	      // in which case reading its value would be expensive.
-	      if (this.contextMenuPending || !cm.state.focused ||
-	          (hasSelection(input) && !prevInput && !this.composing) ||
-	          cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
-	        return false;
-
-	      var text = input.value;
-	      // If nothing changed, bail.
-	      if (text == prevInput && !cm.somethingSelected()) return false;
-	      // Work around nonsensical selection resetting in IE9/10, and
-	      // inexplicable appearance of private area unicode characters on
-	      // some key combos in Mac (#2689).
-	      if (ie && ie_version >= 9 && this.hasSelection === text ||
-	          mac && /[\uf700-\uf7ff]/.test(text)) {
-	        cm.display.input.reset();
-	        return false;
-	      }
-
-	      if (cm.doc.sel == cm.display.selForContextMenu) {
-	        var first = text.charCodeAt(0);
-	        if (first == 0x200b && !prevInput) prevInput = "\u200b";
-	        if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo"); }
-	      }
-	      // Find the part of the input that is actually new
-	      var same = 0, l = Math.min(prevInput.length, text.length);
-	      while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
-
-	      var self = this;
-	      runInOp(cm, function() {
-	        applyTextInput(cm, text.slice(same), prevInput.length - same,
-	                       null, self.composing ? "*compose" : null);
-
-	        // Don't leave long text in the textarea, since it makes further polling slow
-	        if (text.length > 1000 || text.indexOf("\n") > -1) input.value = self.prevInput = "";
-	        else self.prevInput = text;
-
-	        if (self.composing) {
-	          self.composing.range.clear();
-	          self.composing.range = cm.markText(self.composing.start, cm.getCursor("to"),
-	                                             {className: "CodeMirror-composing"});
-	        }
-	      });
-	      return true;
-	    },
-
-	    ensurePolled: function() {
-	      if (this.pollingFast && this.poll()) this.pollingFast = false;
-	    },
-
-	    onKeyPress: function() {
-	      if (ie && ie_version >= 9) this.hasSelection = null;
-	      this.fastPoll();
-	    },
-
-	    onContextMenu: function(e) {
-	      var input = this, cm = input.cm, display = cm.display, te = input.textarea;
-	      var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
-	      if (!pos || presto) return; // Opera is difficult.
-
-	      // Reset the current text selection only if the click is done outside of the selection
-	      // and 'resetSelectionOnContextMenu' option is true.
-	      var reset = cm.options.resetSelectionOnContextMenu;
-	      if (reset && cm.doc.sel.contains(pos) == -1)
-	        operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);
-
-	      var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
-	      input.wrapper.style.cssText = "position: absolute"
-	      var wrapperBox = input.wrapper.getBoundingClientRect()
-	      te.style.cssText = "position: absolute; width: 30px; height: 30px; top: " + (e.clientY - wrapperBox.top - 5) +
-	        "px; left: " + (e.clientX - wrapperBox.left - 5) + "px; z-index: 1000; background: " +
-	        (ie ? "rgba(255, 255, 255, .05)" : "transparent") +
-	        "; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
-	      if (webkit) var oldScrollY = window.scrollY; // Work around Chrome issue (#2712)
-	      display.input.focus();
-	      if (webkit) window.scrollTo(null, oldScrollY);
-	      display.input.reset();
-	      // Adds "Select all" to context menu in FF
-	      if (!cm.somethingSelected()) te.value = input.prevInput = " ";
-	      input.contextMenuPending = true;
-	      display.selForContextMenu = cm.doc.sel;
-	      clearTimeout(display.detectingSelectAll);
-
-	      // Select-all will be greyed out if there's nothing to select, so
-	      // this adds a zero-width space so that we can later check whether
-	      // it got selected.
-	      function prepareSelectAllHack() {
-	        if (te.selectionStart != null) {
-	          var selected = cm.somethingSelected();
-	          var extval = "\u200b" + (selected ? te.value : "");
-	          te.value = "\u21da"; // Used to catch context-menu undo
-	          te.value = extval;
-	          input.prevInput = selected ? "" : "\u200b";
-	          te.selectionStart = 1; te.selectionEnd = extval.length;
-	          // Re-set this, in case some other handler touched the
-	          // selection in the meantime.
-	          display.selForContextMenu = cm.doc.sel;
-	        }
-	      }
-	      function rehide() {
-	        input.contextMenuPending = false;
-	        input.wrapper.style.cssText = oldWrapperCSS
-	        te.style.cssText = oldCSS;
-	        if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos);
-
-	        // Try to detect the user choosing select-all
-	        if (te.selectionStart != null) {
-	          if (!ie || (ie && ie_version < 9)) prepareSelectAllHack();
-	          var i = 0, poll = function() {
-	            if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
-	                te.selectionEnd > 0 && input.prevInput == "\u200b")
-	              operation(cm, commands.selectAll)(cm);
-	            else if (i++ < 10) display.detectingSelectAll = setTimeout(poll, 500);
-	            else display.input.reset();
-	          };
-	          display.detectingSelectAll = setTimeout(poll, 200);
-	        }
-	      }
-
-	      if (ie && ie_version >= 9) prepareSelectAllHack();
-	      if (captureRightClick) {
-	        e_stop(e);
-	        var mouseup = function() {
-	          off(window, "mouseup", mouseup);
-	          setTimeout(rehide, 20);
-	        };
-	        on(window, "mouseup", mouseup);
-	      } else {
-	        setTimeout(rehide, 50);
-	      }
-	    },
-
-	    readOnlyChanged: function(val) {
-	      if (!val) this.reset();
-	    },
-
-	    setUneditable: nothing,
-
-	    needsContentAttribute: false
-	  }, TextareaInput.prototype);
-
-	  // CONTENTEDITABLE INPUT STYLE
-
-	  function ContentEditableInput(cm) {
-	    this.cm = cm;
-	    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
-	    this.polling = new Delayed();
-	    this.gracePeriod = false;
-	  }
-
-	  ContentEditableInput.prototype = copyObj({
-	    init: function(display) {
-	      var input = this, cm = input.cm;
-	      var div = input.div = display.lineDiv;
-	      disableBrowserMagic(div);
-
-	      on(div, "paste", function(e) {
-	        if (!signalDOMEvent(cm, e)) handlePaste(e, cm);
-	      })
-
-	      on(div, "compositionstart", function(e) {
-	        var data = e.data;
-	        input.composing = {sel: cm.doc.sel, data: data, startData: data};
-	        if (!data) return;
-	        var prim = cm.doc.sel.primary();
-	        var line = cm.getLine(prim.head.line);
-	        var found = line.indexOf(data, Math.max(0, prim.head.ch - data.length));
-	        if (found > -1 && found <= prim.head.ch)
-	          input.composing.sel = simpleSelection(Pos(prim.head.line, found),
-	                                                Pos(prim.head.line, found + data.length));
-	      });
-	      on(div, "compositionupdate", function(e) {
-	        input.composing.data = e.data;
-	      });
-	      on(div, "compositionend", function(e) {
-	        var ours = input.composing;
-	        if (!ours) return;
-	        if (e.data != ours.startData && !/\u200b/.test(e.data))
-	          ours.data = e.data;
-	        // Need a small delay to prevent other code (input event,
-	        // selection polling) from doing damage when fired right after
-	        // compositionend.
-	        setTimeout(function() {
-	          if (!ours.handled)
-	            input.applyComposition(ours);
-	          if (input.composing == ours)
-	            input.composing = null;
-	        }, 50);
-	      });
-
-	      on(div, "touchstart", function() {
-	        input.forceCompositionEnd();
-	      });
-
-	      on(div, "input", function() {
-	        if (input.composing) return;
-	        if (cm.isReadOnly() || !input.pollContent())
-	          runInOp(input.cm, function() {regChange(cm);});
-	      });
-
-	      function onCopyCut(e) {
-	        if (signalDOMEvent(cm, e)) return
-	        if (cm.somethingSelected()) {
-	          lastCopied = {lineWise: false, text: cm.getSelections()};
-	          if (e.type == "cut") cm.replaceSelection("", null, "cut");
-	        } else if (!cm.options.lineWiseCopyCut) {
-	          return;
-	        } else {
-	          var ranges = copyableRanges(cm);
-	          lastCopied = {lineWise: true, text: ranges.text};
-	          if (e.type == "cut") {
-	            cm.operation(function() {
-	              cm.setSelections(ranges.ranges, 0, sel_dontScroll);
-	              cm.replaceSelection("", null, "cut");
-	            });
-	          }
-	        }
-	        // iOS exposes the clipboard API, but seems to discard content inserted into it
-	        if (e.clipboardData && !ios) {
-	          e.preventDefault();
-	          e.clipboardData.clearData();
-	          e.clipboardData.setData("text/plain", lastCopied.text.join("\n"));
-	        } else {
-	          // Old-fashioned briefly-focus-a-textarea hack
-	          var kludge = hiddenTextarea(), te = kludge.firstChild;
-	          cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
-	          te.value = lastCopied.text.join("\n");
-	          var hadFocus = document.activeElement;
-	          selectInput(te);
-	          setTimeout(function() {
-	            cm.display.lineSpace.removeChild(kludge);
-	            hadFocus.focus();
-	          }, 50);
-	        }
-	      }
-	      on(div, "copy", onCopyCut);
-	      on(div, "cut", onCopyCut);
-	    },
-
-	    prepareSelection: function() {
-	      var result = prepareSelection(this.cm, false);
-	      result.focus = this.cm.state.focused;
-	      return result;
-	    },
-
-	    showSelection: function(info, takeFocus) {
-	      if (!info || !this.cm.display.view.length) return;
-	      if (info.focus || takeFocus) this.showPrimarySelection();
-	      this.showMultipleSelections(info);
-	    },
-
-	    showPrimarySelection: function() {
-	      var sel = window.getSelection(), prim = this.cm.doc.sel.primary();
-	      var curAnchor = domToPos(this.cm, sel.anchorNode, sel.anchorOffset);
-	      var curFocus = domToPos(this.cm, sel.focusNode, sel.focusOffset);
-	      if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
-	          cmp(minPos(curAnchor, curFocus), prim.from()) == 0 &&
-	          cmp(maxPos(curAnchor, curFocus), prim.to()) == 0)
-	        return;
-
-	      var start = posToDOM(this.cm, prim.from());
-	      var end = posToDOM(this.cm, prim.to());
-	      if (!start && !end) return;
-
-	      var view = this.cm.display.view;
-	      var old = sel.rangeCount && sel.getRangeAt(0);
-	      if (!start) {
-	        start = {node: view[0].measure.map[2], offset: 0};
-	      } else if (!end) { // FIXME dangerously hacky
-	        var measure = view[view.length - 1].measure;
-	        var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
-	        end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
-	      }
-
-	      try { var rng = range(start.node, start.offset, end.offset, end.node); }
-	      catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
-	      if (rng) {
-	        if (!gecko && this.cm.state.focused) {
-	          sel.collapse(start.node, start.offset);
-	          if (!rng.collapsed) sel.addRange(rng);
-	        } else {
-	          sel.removeAllRanges();
-	          sel.addRange(rng);
-	        }
-	        if (old && sel.anchorNode == null) sel.addRange(old);
-	        else if (gecko) this.startGracePeriod();
-	      }
-	      this.rememberSelection();
-	    },
-
-	    startGracePeriod: function() {
-	      var input = this;
-	      clearTimeout(this.gracePeriod);
-	      this.gracePeriod = setTimeout(function() {
-	        input.gracePeriod = false;
-	        if (input.selectionChanged())
-	          input.cm.operation(function() { input.cm.curOp.selectionChanged = true; });
-	      }, 20);
-	    },
-
-	    showMultipleSelections: function(info) {
-	      removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
-	      removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
-	    },
-
-	    rememberSelection: function() {
-	      var sel = window.getSelection();
-	      this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
-	      this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
-	    },
-
-	    selectionInEditor: function() {
-	      var sel = window.getSelection();
-	      if (!sel.rangeCount) return false;
-	      var node = sel.getRangeAt(0).commonAncestorContainer;
-	      return contains(this.div, node);
-	    },
-
-	    focus: function() {
-	      if (this.cm.options.readOnly != "nocursor") this.div.focus();
-	    },
-	    blur: function() { this.div.blur(); },
-	    getField: function() { return this.div; },
-
-	    supportsTouch: function() { return true; },
-
-	    receivedFocus: function() {
-	      var input = this;
-	      if (this.selectionInEditor())
-	        this.pollSelection();
-	      else
-	        runInOp(this.cm, function() { input.cm.curOp.selectionChanged = true; });
-
-	      function poll() {
-	        if (input.cm.state.focused) {
-	          input.pollSelection();
-	          input.polling.set(input.cm.options.pollInterval, poll);
-	        }
-	      }
-	      this.polling.set(this.cm.options.pollInterval, poll);
-	    },
-
-	    selectionChanged: function() {
-	      var sel = window.getSelection();
-	      return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
-	        sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset;
-	    },
-
-	    pollSelection: function() {
-	      if (!this.composing && !this.gracePeriod && this.selectionChanged()) {
-	        var sel = window.getSelection(), cm = this.cm;
-	        this.rememberSelection();
-	        var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
-	        var head = domToPos(cm, sel.focusNode, sel.focusOffset);
-	        if (anchor && head) runInOp(cm, function() {
-	          setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
-	          if (anchor.bad || head.bad) cm.curOp.selectionChanged = true;
-	        });
-	      }
-	    },
-
-	    pollContent: function() {
-	      var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
-	      var from = sel.from(), to = sel.to();
-	      if (from.line < display.viewFrom || to.line > display.viewTo - 1) return false;
-
-	      var fromIndex;
-	      if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
-	        var fromLine = lineNo(display.view[0].line);
-	        var fromNode = display.view[0].node;
-	      } else {
-	        var fromLine = lineNo(display.view[fromIndex].line);
-	        var fromNode = display.view[fromIndex - 1].node.nextSibling;
-	      }
-	      var toIndex = findViewIndex(cm, to.line);
-	      if (toIndex == display.view.length - 1) {
-	        var toLine = display.viewTo - 1;
-	        var toNode = display.lineDiv.lastChild;
-	      } else {
-	        var toLine = lineNo(display.view[toIndex + 1].line) - 1;
-	        var toNode = display.view[toIndex + 1].node.previousSibling;
-	      }
-
-	      var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
-	      var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
-	      while (newText.length > 1 && oldText.length > 1) {
-	        if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
-	        else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
-	        else break;
-	      }
-
-	      var cutFront = 0, cutEnd = 0;
-	      var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
-	      while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
-	        ++cutFront;
-	      var newBot = lst(newText), oldBot = lst(oldText);
-	      var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
-	                               oldBot.length - (oldText.length == 1 ? cutFront : 0));
-	      while (cutEnd < maxCutEnd &&
-	             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
-	        ++cutEnd;
-
-	      newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd);
-	      newText[0] = newText[0].slice(cutFront);
-
-	      var chFrom = Pos(fromLine, cutFront);
-	      var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
-	      if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
-	        replaceRange(cm.doc, newText, chFrom, chTo, "+input");
-	        return true;
-	      }
-	    },
-
-	    ensurePolled: function() {
-	      this.forceCompositionEnd();
-	    },
-	    reset: function() {
-	      this.forceCompositionEnd();
-	    },
-	    forceCompositionEnd: function() {
-	      if (!this.composing || this.composing.handled) return;
-	      this.applyComposition(this.composing);
-	      this.composing.handled = true;
-	      this.div.blur();
-	      this.div.focus();
-	    },
-	    applyComposition: function(composing) {
-	      if (this.cm.isReadOnly())
-	        operation(this.cm, regChange)(this.cm)
-	      else if (composing.data && composing.data != composing.startData)
-	        operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel);
-	    },
-
-	    setUneditable: function(node) {
-	      node.contentEditable = "false"
-	    },
-
-	    onKeyPress: function(e) {
-	      e.preventDefault();
-	      if (!this.cm.isReadOnly())
-	        operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0);
-	    },
-
-	    readOnlyChanged: function(val) {
-	      this.div.contentEditable = String(val != "nocursor")
-	    },
-
-	    onContextMenu: nothing,
-	    resetPosition: nothing,
-
-	    needsContentAttribute: true
-	  }, ContentEditableInput.prototype);
-
-	  function posToDOM(cm, pos) {
-	    var view = findViewForLine(cm, pos.line);
-	    if (!view || view.hidden) return null;
-	    var line = getLine(cm.doc, pos.line);
-	    var info = mapFromLineView(view, line, pos.line);
-
-	    var order = getOrder(line), side = "left";
-	    if (order) {
-	      var partPos = getBidiPartAt(order, pos.ch);
-	      side = partPos % 2 ? "right" : "left";
-	    }
-	    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
-	    result.offset = result.collapse == "right" ? result.end : result.start;
-	    return result;
-	  }
-
-	  function badPos(pos, bad) { if (bad) pos.bad = true; return pos; }
-
-	  function domToPos(cm, node, offset) {
-	    var lineNode;
-	    if (node == cm.display.lineDiv) {
-	      lineNode = cm.display.lineDiv.childNodes[offset];
-	      if (!lineNode) return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true);
-	      node = null; offset = 0;
+	        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias) }
+	      if (rect.left || rect.right || start == 0) { break }
+	      end = start
+	      start = start - 1
+	      collapse = "right"
+	    }
+	    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect) }
+	  } else { // If it is a widget, simply get the box for the whole widget.
+	    if (start > 0) { collapse = bias = "right" }
+	    var rects
+	    if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+	      { rect = rects[bias == "right" ? rects.length - 1 : 0] }
+	    else
+	      { rect = node.getBoundingClientRect() }
+	  }
+	  if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+	    var rSpan = node.parentNode.getClientRects()[0]
+	    if (rSpan)
+	      { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom} }
+	    else
+	      { rect = nullRect }
+	  }
+
+	  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top
+	  var mid = (rtop + rbot) / 2
+	  var heights = prepared.view.measure.heights
+	  var i = 0
+	  for (; i < heights.length - 1; i++)
+	    { if (mid < heights[i]) { break } }
+	  var top = i ? heights[i - 1] : 0, bot = heights[i]
+	  var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+	                right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+	                top: top, bottom: bot}
+	  if (!rect.left && !rect.right) { result.bogus = true }
+	  if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot }
+
+	  return result
+	}
+
+	// Work around problem with bounding client rects on ranges being
+	// returned incorrectly when zoomed on IE10 and below.
+	function maybeUpdateRectForZooming(measure, rect) {
+	  if (!window.screen || screen.logicalXDPI == null ||
+	      screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+	    { return rect }
+	  var scaleX = screen.logicalXDPI / screen.deviceXDPI
+	  var scaleY = screen.logicalYDPI / screen.deviceYDPI
+	  return {left: rect.left * scaleX, right: rect.right * scaleX,
+	          top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+	}
+
+	function clearLineMeasurementCacheFor(lineView) {
+	  if (lineView.measure) {
+	    lineView.measure.cache = {}
+	    lineView.measure.heights = null
+	    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+	      { lineView.measure.caches[i] = {} } }
+	  }
+	}
+
+	function clearLineMeasurementCache(cm) {
+	  cm.display.externalMeasure = null
+	  removeChildren(cm.display.lineMeasure)
+	  for (var i = 0; i < cm.display.view.length; i++)
+	    { clearLineMeasurementCacheFor(cm.display.view[i]) }
+	}
+
+	function clearCaches(cm) {
+	  clearLineMeasurementCache(cm)
+	  cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null
+	  if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true }
+	  cm.display.lineNumChars = null
+	}
+
+	function pageScrollX() {
+	  // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+	  // which causes page_Offset and bounding client rects to use
+	  // different reference viewports and invalidate our calculations.
+	  if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+	  return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+	}
+	function pageScrollY() {
+	  if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+	  return window.pageYOffset || (document.documentElement || document.body).scrollTop
+	}
+
+	// Converts a {top, bottom, left, right} box from line-local
+	// coordinates into another coordinate system. Context may be one of
+	// "line", "div" (display.lineDiv), "local"./null (editor), "window",
+	// or "page".
+	function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+	  if (!includeWidgets && lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above) {
+	    var size = widgetHeight(lineObj.widgets[i])
+	    rect.top += size; rect.bottom += size
+	  } } }
+	  if (context == "line") { return rect }
+	  if (!context) { context = "local" }
+	  var yOff = heightAtLine(lineObj)
+	  if (context == "local") { yOff += paddingTop(cm.display) }
+	  else { yOff -= cm.display.viewOffset }
+	  if (context == "page" || context == "window") {
+	    var lOff = cm.display.lineSpace.getBoundingClientRect()
+	    yOff += lOff.top + (context == "window" ? 0 : pageScrollY())
+	    var xOff = lOff.left + (context == "window" ? 0 : pageScrollX())
+	    rect.left += xOff; rect.right += xOff
+	  }
+	  rect.top += yOff; rect.bottom += yOff
+	  return rect
+	}
+
+	// Coverts a box from "div" coords to another coordinate system.
+	// Context may be "window", "page", "div", or "local"./null.
+	function fromCoordSystem(cm, coords, context) {
+	  if (context == "div") { return coords }
+	  var left = coords.left, top = coords.top
+	  // First move into "page" coordinate system
+	  if (context == "page") {
+	    left -= pageScrollX()
+	    top -= pageScrollY()
+	  } else if (context == "local" || !context) {
+	    var localBox = cm.display.sizer.getBoundingClientRect()
+	    left += localBox.left
+	    top += localBox.top
+	  }
+
+	  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect()
+	  return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+	}
+
+	function charCoords(cm, pos, context, lineObj, bias) {
+	  if (!lineObj) { lineObj = getLine(cm.doc, pos.line) }
+	  return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+	}
+
+	// Returns a box for a given cursor position, which may have an
+	// 'other' property containing the position of the secondary cursor
+	// on a bidi boundary.
+	// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+	// and after `char - 1` in writing order of `char - 1`
+	// A cursor Pos(line, char, "after") is on the same visual line as `char`
+	// and before `char` in writing order of `char`
+	// Examples (upper-case letters are RTL, lower-case are LTR):
+	//     Pos(0, 1, ...)
+	//     before   after
+	// ab     a|b     a|b
+	// aB     a|B     aB|
+	// Ab     |Ab     A|b
+	// AB     B|A     B|A
+	// Every position after the last character on a line is considered to stick
+	// to the last character on the line.
+	function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+	  lineObj = lineObj || getLine(cm.doc, pos.line)
+	  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
+	  function get(ch, right) {
+	    var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight)
+	    if (right) { m.left = m.right; } else { m.right = m.left }
+	    return intoCoordSystem(cm, lineObj, m, context)
+	  }
+	  var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky
+	  if (ch >= lineObj.text.length) {
+	    ch = lineObj.text.length
+	    sticky = "before"
+	  } else if (ch <= 0) {
+	    ch = 0
+	    sticky = "after"
+	  }
+	  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+	  function getBidi(ch, partPos, invert) {
+	    var part = order[partPos], right = (part.level % 2) != 0
+	    return get(invert ? ch - 1 : ch, right != invert)
+	  }
+	  var partPos = getBidiPartAt(order, ch, sticky)
+	  var other = bidiOther
+	  var val = getBidi(ch, partPos, sticky == "before")
+	  if (other != null) { val.other = getBidi(ch, other, sticky != "before") }
+	  return val
+	}
+
+	// Used to cheaply estimate the coordinates for a position. Used for
+	// intermediate scroll updates.
+	function estimateCoords(cm, pos) {
+	  var left = 0
+	  pos = clipPos(cm.doc, pos)
+	  if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch }
+	  var lineObj = getLine(cm.doc, pos.line)
+	  var top = heightAtLine(lineObj) + paddingTop(cm.display)
+	  return {left: left, right: left, top: top, bottom: top + lineObj.height}
+	}
+
+	// Positions returned by coordsChar contain some extra information.
+	// xRel is the relative x position of the input coordinates compared
+	// to the found position (so xRel > 0 means the coordinates are to
+	// the right of the character position, for example). When outside
+	// is true, that means the coordinates lie outside the line's
+	// vertical range.
+	function PosWithInfo(line, ch, sticky, outside, xRel) {
+	  var pos = Pos(line, ch, sticky)
+	  pos.xRel = xRel
+	  if (outside) { pos.outside = true }
+	  return pos
+	}
+
+	// Compute the character position closest to the given coordinates.
+	// Input must be lineSpace-local ("div" coordinate system).
+	function coordsChar(cm, x, y) {
+	  var doc = cm.doc
+	  y += cm.display.viewOffset
+	  if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
+	  var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1
+	  if (lineN > last)
+	    { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
+	  if (x < 0) { x = 0 }
+
+	  var lineObj = getLine(doc, lineN)
+	  for (;;) {
+	    var found = coordsCharInner(cm, lineObj, lineN, x, y)
+	    var merged = collapsedSpanAtEnd(lineObj)
+	    var mergedPos = merged && merged.find(0, true)
+	    if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
+	      { lineN = lineNo(lineObj = mergedPos.to.line) }
+	    else
+	      { return found }
+	  }
+	}
+
+	function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+	  var measure = function (ch) { return intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, ch), "line"); }
+	  var end = lineObj.text.length
+	  var begin = findFirst(function (ch) { return measure(ch - 1).bottom <= y; }, end, 0)
+	  end = findFirst(function (ch) { return measure(ch).top > y; }, begin, end)
+	  return {begin: begin, end: end}
+	}
+
+	function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+	  var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top
+	  return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+	}
+
+	function coordsCharInner(cm, lineObj, lineNo, x, y) {
+	  y -= heightAtLine(lineObj)
+	  var begin = 0, end = lineObj.text.length
+	  var preparedMeasure = prepareMeasureForLine(cm, lineObj)
+	  var pos
+	  var order = getOrder(lineObj, cm.doc.direction)
+	  if (order) {
+	    if (cm.options.lineWrapping) {
+	      ;var assign;
+	      ((assign = wrappedLineExtent(cm, lineObj, preparedMeasure, y), begin = assign.begin, end = assign.end, assign))
+	    }
+	    pos = new Pos(lineNo, Math.floor(begin + (end - begin) / 2))
+	    var beginLeft = cursorCoords(cm, pos, "line", lineObj, preparedMeasure).left
+	    var dir = beginLeft < x ? 1 : -1
+	    var prevDiff, diff = beginLeft - x, prevPos
+	    var steps = Math.ceil((end - begin) / 4)
+	    outer: do {
+	      prevDiff = diff
+	      prevPos = pos
+	      var i = 0
+	      for (; i < steps; ++i) {
+	        var prevPos$1 = pos
+	        pos = moveVisually(cm, lineObj, pos, dir)
+	        if (pos == null || pos.ch < begin || end <= (pos.sticky == "before" ? pos.ch - 1 : pos.ch)) {
+	          pos = prevPos$1
+	          break outer
+	        }
+	      }
+	      diff = cursorCoords(cm, pos, "line", lineObj, preparedMeasure).left - x
+	      if (steps > 1) {
+	        var diff_change_per_step = Math.abs(diff - prevDiff) / steps
+	        steps = Math.min(steps, Math.ceil(Math.abs(diff) / diff_change_per_step))
+	        dir = diff < 0 ? 1 : -1
+	      }
+	    } while (diff != 0 && (steps > 1 || ((dir < 0) != (diff < 0) && (Math.abs(diff) <= Math.abs(prevDiff)))))
+	    if (Math.abs(diff) > Math.abs(prevDiff)) {
+	      if ((diff < 0) == (prevDiff < 0)) { throw new Error("Broke out of infinite loop in coordsCharInner") }
+	      pos = prevPos
+	    }
+	  } else {
+	    var ch = findFirst(function (ch) {
+	      var box = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, ch), "line")
+	      if (box.top > y) {
+	        // For the cursor stickiness
+	        end = Math.min(ch, end)
+	        return true
+	      }
+	      else if (box.bottom <= y) { return false }
+	      else if (box.left > x) { return true }
+	      else if (box.right < x) { return false }
+	      else { return (x - box.left < box.right - x) }
+	    }, begin, end)
+	    ch = skipExtendingChars(lineObj.text, ch, 1)
+	    pos = new Pos(lineNo, ch, ch == end ? "before" : "after")
+	  }
+	  var coords = cursorCoords(cm, pos, "line", lineObj, preparedMeasure)
+	  if (y < coords.top || coords.bottom < y) { pos.outside = true }
+	  pos.xRel = x < coords.left ? -1 : (x > coords.right ? 1 : 0)
+	  return pos
+	}
+
+	var measureText
+	// Compute the default text height.
+	function textHeight(display) {
+	  if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+	  if (measureText == null) {
+	    measureText = elt("pre")
+	    // Measure a bunch of lines, for browsers that compute
+	    // fractional heights.
+	    for (var i = 0; i < 49; ++i) {
+	      measureText.appendChild(document.createTextNode("x"))
+	      measureText.appendChild(elt("br"))
+	    }
+	    measureText.appendChild(document.createTextNode("x"))
+	  }
+	  removeChildrenAndAdd(display.measure, measureText)
+	  var height = measureText.offsetHeight / 50
+	  if (height > 3) { display.cachedTextHeight = height }
+	  removeChildren(display.measure)
+	  return height || 1
+	}
+
+	// Compute the default character width.
+	function charWidth(display) {
+	  if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+	  var anchor = elt("span", "xxxxxxxxxx")
+	  var pre = elt("pre", [anchor])
+	  removeChildrenAndAdd(display.measure, pre)
+	  var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10
+	  if (width > 2) { display.cachedCharWidth = width }
+	  return width || 10
+	}
+
+	// Do a bulk-read of the DOM positions and sizes needed to draw the
+	// view, so that we don't interleave reading and writing to the DOM.
+	function getDimensions(cm) {
+	  var d = cm.display, left = {}, width = {}
+	  var gutterLeft = d.gutters.clientLeft
+	  for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+	    left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft
+	    width[cm.options.gutters[i]] = n.clientWidth
+	  }
+	  return {fixedPos: compensateForHScroll(d),
+	          gutterTotalWidth: d.gutters.offsetWidth,
+	          gutterLeft: left,
+	          gutterWidth: width,
+	          wrapperWidth: d.wrapper.clientWidth}
+	}
+
+	// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+	// but using getBoundingClientRect to get a sub-pixel-accurate
+	// result.
+	function compensateForHScroll(display) {
+	  return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+	}
+
+	// Returns a function that estimates the height of a line, to use as
+	// first approximation until the line becomes visible (and is thus
+	// properly measurable).
+	function estimateHeight(cm) {
+	  var th = textHeight(cm.display), wrapping = cm.options.lineWrapping
+	  var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3)
+	  return function (line) {
+	    if (lineIsHidden(cm.doc, line)) { return 0 }
+
+	    var widgetsHeight = 0
+	    if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+	      if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height }
+	    } }
+
+	    if (wrapping)
+	      { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+	    else
+	      { return widgetsHeight + th }
+	  }
+	}
+
+	function estimateLineHeights(cm) {
+	  var doc = cm.doc, est = estimateHeight(cm)
+	  doc.iter(function (line) {
+	    var estHeight = est(line)
+	    if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+	  })
+	}
+
+	// Given a mouse event, find the corresponding position. If liberal
+	// is false, it checks whether a gutter or scrollbar was clicked,
+	// and returns null if it was. forRect is used by rectangular
+	// selections, and tries to estimate a character position even for
+	// coordinates beyond the right of the text.
+	function posFromMouse(cm, e, liberal, forRect) {
+	  var display = cm.display
+	  if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+	  var x, y, space = display.lineSpace.getBoundingClientRect()
+	  // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+	  try { x = e.clientX - space.left; y = e.clientY - space.top }
+	  catch (e) { return null }
+	  var coords = coordsChar(cm, x, y), line
+	  if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+	    var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length
+	    coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))
+	  }
+	  return coords
+	}
+
+	// Find the view element corresponding to a given line. Return null
+	// when the line isn't visible.
+	function findViewIndex(cm, n) {
+	  if (n >= cm.display.viewTo) { return null }
+	  n -= cm.display.viewFrom
+	  if (n < 0) { return null }
+	  var view = cm.display.view
+	  for (var i = 0; i < view.length; i++) {
+	    n -= view[i].size
+	    if (n < 0) { return i }
+	  }
+	}
+
+	function updateSelection(cm) {
+	  cm.display.input.showSelection(cm.display.input.prepareSelection())
+	}
+
+	function prepareSelection(cm, primary) {
+	  var doc = cm.doc, result = {}
+	  var curFragment = result.cursors = document.createDocumentFragment()
+	  var selFragment = result.selection = document.createDocumentFragment()
+
+	  for (var i = 0; i < doc.sel.ranges.length; i++) {
+	    if (primary === false && i == doc.sel.primIndex) { continue }
+	    var range = doc.sel.ranges[i]
+	    if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
+	    var collapsed = range.empty()
+	    if (collapsed || cm.options.showCursorWhenSelecting)
+	      { drawSelectionCursor(cm, range.head, curFragment) }
+	    if (!collapsed)
+	      { drawSelectionRange(cm, range, selFragment) }
+	  }
+	  return result
+	}
+
+	// Draws a cursor for the given range
+	function drawSelectionCursor(cm, head, output) {
+	  var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)
+
+	  var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
+	  cursor.style.left = pos.left + "px"
+	  cursor.style.top = pos.top + "px"
+	  cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"
+
+	  if (pos.other) {
+	    // Secondary cursor, shown when on a 'jump' in bi-directional text
+	    var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
+	    otherCursor.style.display = ""
+	    otherCursor.style.left = pos.other.left + "px"
+	    otherCursor.style.top = pos.other.top + "px"
+	    otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
+	  }
+	}
+
+	// Draws the given range as a highlighted selection
+	function drawSelectionRange(cm, range, output) {
+	  var display = cm.display, doc = cm.doc
+	  var fragment = document.createDocumentFragment()
+	  var padding = paddingH(cm.display), leftSide = padding.left
+	  var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right
+
+	  function add(left, top, width, bottom) {
+	    if (top < 0) { top = 0 }
+	    top = Math.round(top)
+	    bottom = Math.round(bottom)
+	    fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")))
+	  }
+
+	  function drawForLine(line, fromArg, toArg) {
+	    var lineObj = getLine(doc, line)
+	    var lineLen = lineObj.text.length
+	    var start, end
+	    function coords(ch, bias) {
+	      return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+	    }
+
+	    iterateBidiSections(getOrder(lineObj, doc.direction), fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir) {
+	      var leftPos = coords(from, "left"), rightPos, left, right
+	      if (from == to) {
+	        rightPos = leftPos
+	        left = right = leftPos.left
+	      } else {
+	        rightPos = coords(to - 1, "right")
+	        if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp }
+	        left = leftPos.left
+	        right = rightPos.right
+	      }
+	      if (fromArg == null && from == 0) { left = leftSide }
+	      if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
+	        add(left, leftPos.top, null, leftPos.bottom)
+	        left = leftSide
+	        if (leftPos.bottom < rightPos.top) { add(left, leftPos.bottom, null, rightPos.top) }
+	      }
+	      if (toArg == null && to == lineLen) { right = rightSide }
+	      if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
+	        { start = leftPos }
+	      if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
+	        { end = rightPos }
+	      if (left < leftSide + 1) { left = leftSide }
+	      add(left, rightPos.top, right - left, rightPos.bottom)
+	    })
+	    return {start: start, end: end}
+	  }
+
+	  var sFrom = range.from(), sTo = range.to()
+	  if (sFrom.line == sTo.line) {
+	    drawForLine(sFrom.line, sFrom.ch, sTo.ch)
+	  } else {
+	    var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
+	    var singleVLine = visualLine(fromLine) == visualLine(toLine)
+	    var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
+	    var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
+	    if (singleVLine) {
+	      if (leftEnd.top < rightStart.top - 2) {
+	        add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
+	        add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
+	      } else {
+	        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
+	      }
+	    }
+	    if (leftEnd.bottom < rightStart.top)
+	      { add(leftSide, leftEnd.bottom, null, rightStart.top) }
+	  }
+
+	  output.appendChild(fragment)
+	}
+
+	// Cursor-blinking
+	function restartBlink(cm) {
+	  if (!cm.state.focused) { return }
+	  var display = cm.display
+	  clearInterval(display.blinker)
+	  var on = true
+	  display.cursorDiv.style.visibility = ""
+	  if (cm.options.cursorBlinkRate > 0)
+	    { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
+	      cm.options.cursorBlinkRate) }
+	  else if (cm.options.cursorBlinkRate < 0)
+	    { display.cursorDiv.style.visibility = "hidden" }
+	}
+
+	function ensureFocus(cm) {
+	  if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm) }
+	}
+
+	function delayBlurEvent(cm) {
+	  cm.state.delayingBlurEvent = true
+	  setTimeout(function () { if (cm.state.delayingBlurEvent) {
+	    cm.state.delayingBlurEvent = false
+	    onBlur(cm)
+	  } }, 100)
+	}
+
+	function onFocus(cm, e) {
+	  if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false }
+
+	  if (cm.options.readOnly == "nocursor") { return }
+	  if (!cm.state.focused) {
+	    signal(cm, "focus", cm, e)
+	    cm.state.focused = true
+	    addClass(cm.display.wrapper, "CodeMirror-focused")
+	    // This test prevents this from firing when a context
+	    // menu is closed (since the input reset would kill the
+	    // select-all detection hack)
+	    if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+	      cm.display.input.reset()
+	      if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20) } // Issue #1730
+	    }
+	    cm.display.input.receivedFocus()
+	  }
+	  restartBlink(cm)
+	}
+	function onBlur(cm, e) {
+	  if (cm.state.delayingBlurEvent) { return }
+
+	  if (cm.state.focused) {
+	    signal(cm, "blur", cm, e)
+	    cm.state.focused = false
+	    rmClass(cm.display.wrapper, "CodeMirror-focused")
+	  }
+	  clearInterval(cm.display.blinker)
+	  setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false } }, 150)
+	}
+
+	// Read the actual heights of the rendered lines, and update their
+	// stored heights to match.
+	function updateHeightsInViewport(cm) {
+	  var display = cm.display
+	  var prevBottom = display.lineDiv.offsetTop
+	  for (var i = 0; i < display.view.length; i++) {
+	    var cur = display.view[i], height = (void 0)
+	    if (cur.hidden) { continue }
+	    if (ie && ie_version < 8) {
+	      var bot = cur.node.offsetTop + cur.node.offsetHeight
+	      height = bot - prevBottom
+	      prevBottom = bot
 	    } else {
-	      for (lineNode = node;; lineNode = lineNode.parentNode) {
-	        if (!lineNode || lineNode == cm.display.lineDiv) return null;
-	        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) break;
-	      }
-	    }
-	    for (var i = 0; i < cm.display.view.length; i++) {
-	      var lineView = cm.display.view[i];
-	      if (lineView.node == lineNode)
-	        return locateNodeInLineView(lineView, node, offset);
-	    }
-	  }
-
-	  function locateNodeInLineView(lineView, node, offset) {
-	    var wrapper = lineView.text.firstChild, bad = false;
-	    if (!node || !contains(wrapper, node)) return badPos(Pos(lineNo(lineView.line), 0), true);
-	    if (node == wrapper) {
-	      bad = true;
-	      node = wrapper.childNodes[offset];
-	      offset = 0;
-	      if (!node) {
-	        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
-	        return badPos(Pos(lineNo(line), line.text.length), bad);
-	      }
-	    }
-
-	    var textNode = node.nodeType == 3 ? node : null, topNode = node;
-	    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
-	      textNode = node.firstChild;
-	      if (offset) offset = textNode.nodeValue.length;
-	    }
-	    while (topNode.parentNode != wrapper) topNode = topNode.parentNode;
-	    var measure = lineView.measure, maps = measure.maps;
-
-	    function find(textNode, topNode, offset) {
-	      for (var i = -1; i < (maps ? maps.length : 0); i++) {
-	        var map = i < 0 ? measure.map : maps[i];
-	        for (var j = 0; j < map.length; j += 3) {
-	          var curNode = map[j + 2];
-	          if (curNode == textNode || curNode == topNode) {
-	            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
-	            var ch = map[j] + offset;
-	            if (offset < 0 || curNode != textNode) ch = map[j + (offset ? 1 : 0)];
-	            return Pos(line, ch);
-	          }
-	        }
-	      }
-	    }
-	    var found = find(textNode, topNode, offset);
-	    if (found) return badPos(found, bad);
-
-	    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
-	    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
-	      found = find(after, after.firstChild, 0);
-	      if (found)
-	        return badPos(Pos(found.line, found.ch - dist), bad);
-	      else
-	        dist += after.textContent.length;
-	    }
-	    for (var before = topNode.previousSibling, dist = offset; before; before = before.previousSibling) {
-	      found = find(before, before.firstChild, -1);
-	      if (found)
-	        return badPos(Pos(found.line, found.ch + dist), bad);
-	      else
-	        dist += after.textContent.length;
-	    }
-	  }
-
-	  function domTextBetween(cm, from, to, fromLine, toLine) {
-	    var text = "", closing = false, lineSep = cm.doc.lineSeparator();
-	    function recognizeMarker(id) { return function(marker) { return marker.id == id; }; }
-	    function walk(node) {
-	      if (node.nodeType == 1) {
-	        var cmText = node.getAttribute("cm-text");
-	        if (cmText != null) {
-	          if (cmText == "") cmText = node.textContent.replace(/\u200b/g, "");
-	          text += cmText;
-	          return;
-	        }
-	        var markerID = node.getAttribute("cm-marker"), range;
-	        if (markerID) {
-	          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
-	          if (found.length && (range = found[0].find()))
-	            text += getBetween(cm.doc, range.from, range.to).join(lineSep);
-	          return;
-	        }
-	        if (node.getAttribute("contenteditable") == "false") return;
-	        for (var i = 0; i < node.childNodes.length; i++)
-	          walk(node.childNodes[i]);
-	        if (/^(pre|div|p)$/i.test(node.nodeName))
-	          closing = true;
-	      } else if (node.nodeType == 3) {
-	        var val = node.nodeValue;
-	        if (!val) return;
-	        if (closing) {
-	          text += lineSep;
-	          closing = false;
-	        }
-	        text += val;
-	      }
-	    }
-	    for (;;) {
-	      walk(from);
-	      if (from == to) break;
-	      from = from.nextSibling;
-	    }
-	    return text;
-	  }
-
-	  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
-
-	  // SELECTION / CURSOR
-
-	  // Selection objects are immutable. A new one is created every time
-	  // the selection changes. A selection is one or more non-overlapping
-	  // (and non-touching) ranges, sorted, and an integer that indicates
-	  // which one is the primary selection (the one that's scrolled into
-	  // view, that getCursor returns, etc).
-	  function Selection(ranges, primIndex) {
-	    this.ranges = ranges;
-	    this.primIndex = primIndex;
-	  }
-
-	  Selection.prototype = {
-	    primary: function() { return this.ranges[this.primIndex]; },
-	    equals: function(other) {
-	      if (other == this) return true;
-	      if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false;
-	      for (var i = 0; i < this.ranges.length; i++) {
-	        var here = this.ranges[i], there = other.ranges[i];
-	        if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false;
-	      }
-	      return true;
-	    },
-	    deepCopy: function() {
-	      for (var out = [], i = 0; i < this.ranges.length; i++)
-	        out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head));
-	      return new Selection(out, this.primIndex);
-	    },
-	    somethingSelected: function() {
-	      for (var i = 0; i < this.ranges.length; i++)
-	        if (!this.ranges[i].empty()) return true;
-	      return false;
-	    },
-	    contains: function(pos, end) {
-	      if (!end) end = pos;
-	      for (var i = 0; i < this.ranges.length; i++) {
-	        var range = this.ranges[i];
-	        if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
-	          return i;
-	      }
-	      return -1;
-	    }
-	  };
-
-	  function Range(anchor, head) {
-	    this.anchor = anchor; this.head = head;
-	  }
-
-	  Range.prototype = {
-	    from: function() { return minPos(this.anchor, this.head); },
-	    to: function() { return maxPos(this.anchor, this.head); },
-	    empty: function() {
-	      return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch;
-	    }
-	  };
-
-	  // Take an unsorted, potentially overlapping set of ranges, and
-	  // build a selection out of it. 'Consumes' ranges array (modifying
-	  // it).
-	  function normalizeSelection(ranges, primIndex) {
-	    var prim = ranges[primIndex];
-	    ranges.sort(function(a, b) { return cmp(a.from(), b.from()); });
-	    primIndex = indexOf(ranges, prim);
-	    for (var i = 1; i < ranges.length; i++) {
-	      var cur = ranges[i], prev = ranges[i - 1];
-	      if (cmp(prev.to(), cur.from()) >= 0) {
-	        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
-	        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
-	        if (i <= primIndex) --primIndex;
-	        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
-	      }
-	    }
-	    return new Selection(ranges, primIndex);
-	  }
-
-	  function simpleSelection(anchor, head) {
-	    return new Selection([new Range(anchor, head || anchor)], 0);
-	  }
-
-	  // Most of the external API clips given positions to make sure they
-	  // actually exist within the document.
-	  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
-	  function clipPos(doc, pos) {
-	    if (pos.line < doc.first) return Pos(doc.first, 0);
-	    var last = doc.first + doc.size - 1;
-	    if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
-	    return clipToLen(pos, getLine(doc, pos.line).text.length);
-	  }
-	  function clipToLen(pos, linelen) {
-	    var ch = pos.ch;
-	    if (ch == null || ch > linelen) return Pos(pos.line, linelen);
-	    else if (ch < 0) return Pos(pos.line, 0);
-	    else return pos;
-	  }
-	  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
-	  function clipPosArray(doc, array) {
-	    for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]);
-	    return out;
-	  }
-
-	  // SELECTION UPDATES
-
-	  // The 'scroll' parameter given to many of these indicated whether
-	  // the new cursor position should be scrolled into view after
-	  // modifying the selection.
-
-	  // If shift is held or the extend flag is set, extends a range to
-	  // include a given position (and optionally a second position).
-	  // Otherwise, simply returns the range between the given positions.
-	  // Used for cursor motion and such.
-	  function extendRange(doc, range, head, other) {
-	    if (doc.cm && doc.cm.display.shift || doc.extend) {
-	      var anchor = range.anchor;
-	      if (other) {
-	        var posBefore = cmp(head, anchor) < 0;
-	        if (posBefore != (cmp(other, anchor) < 0)) {
-	          anchor = head;
-	          head = other;
-	        } else if (posBefore != (cmp(head, other) < 0)) {
-	          head = other;
-	        }
-	      }
-	      return new Range(anchor, head);
+	      var box = cur.node.getBoundingClientRect()
+	      height = box.bottom - box.top
+	    }
+	    var diff = cur.line.height - height
+	    if (height < 2) { height = textHeight(display) }
+	    if (diff > .005 || diff < -.005) {
+	      updateLineHeight(cur.line, height)
+	      updateWidgetHeight(cur.line)
+	      if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+	        { updateWidgetHeight(cur.rest[j]) } }
+	    }
+	  }
+	}
+
+	// Read and store the height of line widgets associated with the
+	// given line.
+	function updateWidgetHeight(line) {
+	  if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
+	    { line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight } }
+	}
+
+	// Compute the lines that are visible in a given viewport (defaults
+	// the the current scroll position). viewport may contain top,
+	// height, and ensure (see op.scrollToPos) properties.
+	function visibleLines(display, doc, viewport) {
+	  var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
+	  top = Math.floor(top - paddingTop(display))
+	  var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight
+
+	  var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
+	  // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+	  // forces those lines into the viewport (if possible).
+	  if (viewport && viewport.ensure) {
+	    var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
+	    if (ensureFrom < from) {
+	      from = ensureFrom
+	      to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
+	    } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+	      from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
+	      to = ensureTo
+	    }
+	  }
+	  return {from: from, to: Math.max(to, from + 1)}
+	}
+
+	// Re-align line numbers and gutter marks to compensate for
+	// horizontal scrolling.
+	function alignHorizontally(cm) {
+	  var display = cm.display, view = display.view
+	  if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+	  var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
+	  var gutterW = display.gutters.offsetWidth, left = comp + "px"
+	  for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+	    if (cm.options.fixedGutter) {
+	      if (view[i].gutter)
+	        { view[i].gutter.style.left = left }
+	      if (view[i].gutterBackground)
+	        { view[i].gutterBackground.style.left = left }
+	    }
+	    var align = view[i].alignable
+	    if (align) { for (var j = 0; j < align.length; j++)
+	      { align[j].style.left = left } }
+	  } }
+	  if (cm.options.fixedGutter)
+	    { display.gutters.style.left = (comp + gutterW) + "px" }
+	}
+
+	// Used to ensure that the line number gutter is still the right
+	// size for the current document size. Returns true when an update
+	// is needed.
+	function maybeUpdateLineNumberWidth(cm) {
+	  if (!cm.options.lineNumbers) { return false }
+	  var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
+	  if (last.length != display.lineNumChars) {
+	    var test = display.measure.appendChild(elt("div", [elt("div", last)],
+	                                               "CodeMirror-linenumber CodeMirror-gutter-elt"))
+	    var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
+	    display.lineGutter.style.width = ""
+	    display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
+	    display.lineNumWidth = display.lineNumInnerWidth + padding
+	    display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
+	    display.lineGutter.style.width = display.lineNumWidth + "px"
+	    updateGutterSpace(cm)
+	    return true
+	  }
+	  return false
+	}
+
+	// SCROLLING THINGS INTO VIEW
+
+	// If an editor sits on the top or bottom of the window, partially
+	// scrolled out of view, this ensures that the cursor is visible.
+	function maybeScrollWindow(cm, rect) {
+	  if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+	  var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null
+	  if (rect.top + box.top < 0) { doScroll = true }
+	  else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false }
+	  if (doScroll != null && !phantom) {
+	    var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"))
+	    cm.display.lineSpace.appendChild(scrollNode)
+	    scrollNode.scrollIntoView(doScroll)
+	    cm.display.lineSpace.removeChild(scrollNode)
+	  }
+	}
+
+	// Scroll a given position into view (immediately), verifying that
+	// it actually became visible (as line heights are accurately
+	// measured, the position of something may 'drift' during drawing).
+	function scrollPosIntoView(cm, pos, end, margin) {
+	  if (margin == null) { margin = 0 }
+	  var rect
+	  if (!cm.options.lineWrapping && pos == end) {
+	    // Set pos and end to the cursor positions around the character pos sticks to
+	    // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+	    // If pos == Pos(_, 0, "before"), pos and end are unchanged
+	    pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos
+	    end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos
+	  }
+	  for (var limit = 0; limit < 5; limit++) {
+	    var changed = false
+	    var coords = cursorCoords(cm, pos)
+	    var endCoords = !end || end == pos ? coords : cursorCoords(cm, end)
+	    rect = {left: Math.min(coords.left, endCoords.left),
+	            top: Math.min(coords.top, endCoords.top) - margin,
+	            right: Math.max(coords.left, endCoords.left),
+	            bottom: Math.max(coords.bottom, endCoords.bottom) + margin}
+	    var scrollPos = calculateScrollPos(cm, rect)
+	    var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft
+	    if (scrollPos.scrollTop != null) {
+	      updateScrollTop(cm, scrollPos.scrollTop)
+	      if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true }
+	    }
+	    if (scrollPos.scrollLeft != null) {
+	      setScrollLeft(cm, scrollPos.scrollLeft)
+	      if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true }
+	    }
+	    if (!changed) { break }
+	  }
+	  return rect
+	}
+
+	// Scroll a given set of coordinates into view (immediately).
+	function scrollIntoView(cm, rect) {
+	  var scrollPos = calculateScrollPos(cm, rect)
+	  if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop) }
+	  if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft) }
+	}
+
+	// Calculate a new scroll position needed to scroll the given
+	// rectangle into view. Returns an object with scrollTop and
+	// scrollLeft properties. When these are undefined, the
+	// vertical/horizontal position does not need to be adjusted.
+	function calculateScrollPos(cm, rect) {
+	  var display = cm.display, snapMargin = textHeight(cm.display)
+	  if (rect.top < 0) { rect.top = 0 }
+	  var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop
+	  var screen = displayHeight(cm), result = {}
+	  if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen }
+	  var docBottom = cm.doc.height + paddingVert(display)
+	  var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin
+	  if (rect.top < screentop) {
+	    result.scrollTop = atTop ? 0 : rect.top
+	  } else if (rect.bottom > screentop + screen) {
+	    var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen)
+	    if (newTop != screentop) { result.scrollTop = newTop }
+	  }
+
+	  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft
+	  var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0)
+	  var tooWide = rect.right - rect.left > screenw
+	  if (tooWide) { rect.right = rect.left + screenw }
+	  if (rect.left < 10)
+	    { result.scrollLeft = 0 }
+	  else if (rect.left < screenleft)
+	    { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)) }
+	  else if (rect.right > screenw + screenleft - 3)
+	    { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw }
+	  return result
+	}
+
+	// Store a relative adjustment to the scroll position in the current
+	// operation (to be applied when the operation finishes).
+	function addToScrollTop(cm, top) {
+	  if (top == null) { return }
+	  resolveScrollToPos(cm)
+	  cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top
+	}
+
+	// Make sure that at the end of the operation the current cursor is
+	// shown.
+	function ensureCursorVisible(cm) {
+	  resolveScrollToPos(cm)
+	  var cur = cm.getCursor()
+	  cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin}
+	}
+
+	function scrollToCoords(cm, x, y) {
+	  if (x != null || y != null) { resolveScrollToPos(cm) }
+	  if (x != null) { cm.curOp.scrollLeft = x }
+	  if (y != null) { cm.curOp.scrollTop = y }
+	}
+
+	function scrollToRange(cm, range) {
+	  resolveScrollToPos(cm)
+	  cm.curOp.scrollToPos = range
+	}
+
+	// When an operation has its scrollToPos property set, and another
+	// scroll action is applied before the end of the operation, this
+	// 'simulates' scrolling that position into view in a cheap way, so
+	// that the effect of intermediate scroll commands is not ignored.
+	function resolveScrollToPos(cm) {
+	  var range = cm.curOp.scrollToPos
+	  if (range) {
+	    cm.curOp.scrollToPos = null
+	    var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to)
+	    scrollToCoordsRange(cm, from, to, range.margin)
+	  }
+	}
+
+	function scrollToCoordsRange(cm, from, to, margin) {
+	  var sPos = calculateScrollPos(cm, {
+	    left: Math.min(from.left, to.left),
+	    top: Math.min(from.top, to.top) - margin,
+	    right: Math.max(from.right, to.right),
+	    bottom: Math.max(from.bottom, to.bottom) + margin
+	  })
+	  scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop)
+	}
+
+	// Sync the scrollable area and scrollbars, ensure the viewport
+	// covers the visible area.
+	function updateScrollTop(cm, val) {
+	  if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+	  if (!gecko) { updateDisplaySimple(cm, {top: val}) }
+	  setScrollTop(cm, val, true)
+	  if (gecko) { updateDisplaySimple(cm) }
+	  startWorker(cm, 100)
+	}
+
+	function setScrollTop(cm, val, forceScroll) {
+	  val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val)
+	  if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+	  cm.doc.scrollTop = val
+	  cm.display.scrollbars.setScrollTop(val)
+	  if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val }
+	}
+
+	// Sync scroller and scrollbar, ensure the gutter elements are
+	// aligned.
+	function setScrollLeft(cm, val, isScroller, forceScroll) {
+	  val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth)
+	  if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+	  cm.doc.scrollLeft = val
+	  alignHorizontally(cm)
+	  if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val }
+	  cm.display.scrollbars.setScrollLeft(val)
+	}
+
+	// SCROLLBARS
+
+	// Prepare DOM reads needed to update the scrollbars. Done in one
+	// shot to minimize update/measure roundtrips.
+	function measureForScrollbars(cm) {
+	  var d = cm.display, gutterW = d.gutters.offsetWidth
+	  var docH = Math.round(cm.doc.height + paddingVert(cm.display))
+	  return {
+	    clientHeight: d.scroller.clientHeight,
+	    viewHeight: d.wrapper.clientHeight,
+	    scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+	    viewWidth: d.wrapper.clientWidth,
+	    barLeft: cm.options.fixedGutter ? gutterW : 0,
+	    docHeight: docH,
+	    scrollHeight: docH + scrollGap(cm) + d.barHeight,
+	    nativeBarWidth: d.nativeBarWidth,
+	    gutterWidth: gutterW
+	  }
+	}
+
+	var NativeScrollbars = function(place, scroll, cm) {
+	  this.cm = cm
+	  var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar")
+	  var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar")
+	  place(vert); place(horiz)
+
+	  on(vert, "scroll", function () {
+	    if (vert.clientHeight) { scroll(vert.scrollTop, "vertical") }
+	  })
+	  on(horiz, "scroll", function () {
+	    if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal") }
+	  })
+
+	  this.checkedZeroWidth = false
+	  // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+	  if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px" }
+	};
+
+	NativeScrollbars.prototype.update = function (measure) {
+	  var needsH = measure.scrollWidth > measure.clientWidth + 1
+	  var needsV = measure.scrollHeight > measure.clientHeight + 1
+	  var sWidth = measure.nativeBarWidth
+
+	  if (needsV) {
+	    this.vert.style.display = "block"
+	    this.vert.style.bottom = needsH ? sWidth + "px" : "0"
+	    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0)
+	    // A bug in IE8 can cause this value to be negative, so guard it.
+	    this.vert.firstChild.style.height =
+	      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"
+	  } else {
+	    this.vert.style.display = ""
+	    this.vert.firstChild.style.height = "0"
+	  }
+
+	  if (needsH) {
+	    this.horiz.style.display = "block"
+	    this.horiz.style.right = needsV ? sWidth + "px" : "0"
+	    this.horiz.style.left = measure.barLeft + "px"
+	    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0)
+	    this.horiz.firstChild.style.width =
+	      Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px"
+	  } else {
+	    this.horiz.style.display = ""
+	    this.horiz.firstChild.style.width = "0"
+	  }
+
+	  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+	    if (sWidth == 0) { this.zeroWidthHack() }
+	    this.checkedZeroWidth = true
+	  }
+
+	  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+	};
+
+	NativeScrollbars.prototype.setScrollLeft = function (pos) {
+	  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos }
+	  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz") }
+	};
+
+	NativeScrollbars.prototype.setScrollTop = function (pos) {
+	  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos }
+	  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert") }
+	};
+
+	NativeScrollbars.prototype.zeroWidthHack = function () {
+	  var w = mac && !mac_geMountainLion ? "12px" : "18px"
+	  this.horiz.style.height = this.vert.style.width = w
+	  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"
+	  this.disableHoriz = new Delayed
+	  this.disableVert = new Delayed
+	};
+
+	NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+	  bar.style.pointerEvents = "auto"
+	  function maybeDisable() {
+	    // To find out whether the scrollbar is still visible, we
+	    // check whether the element under the pixel in the bottom
+	    // right corner of the scrollbar box is the scrollbar box
+	    // itself (when the bar is still visible) or its filler child
+	    // (when the bar is hidden). If it is still visible, we keep
+	    // it enabled, if it's hidden, we disable pointer events.
+	    var box = bar.getBoundingClientRect()
+	    var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+	        : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1)
+	    if (elt != bar) { bar.style.pointerEvents = "none" }
+	    else { delay.set(1000, maybeDisable) }
+	  }
+	  delay.set(1000, maybeDisable)
+	};
+
+	NativeScrollbars.prototype.clear = function () {
+	  var parent = this.horiz.parentNode
+	  parent.removeChild(this.horiz)
+	  parent.removeChild(this.vert)
+	};
+
+	var NullScrollbars = function () {};
+
+	NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+	NullScrollbars.prototype.setScrollLeft = function () {};
+	NullScrollbars.prototype.setScrollTop = function () {};
+	NullScrollbars.prototype.clear = function () {};
+
+	function updateScrollbars(cm, measure) {
+	  if (!measure) { measure = measureForScrollbars(cm) }
+	  var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight
+	  updateScrollbarsInner(cm, measure)
+	  for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+	    if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+	      { updateHeightsInViewport(cm) }
+	    updateScrollbarsInner(cm, measureForScrollbars(cm))
+	    startWidth = cm.display.barWidth; startHeight = cm.display.barHeight
+	  }
+	}
+
+	// Re-synchronize the fake scrollbars with the actual size of the
+	// content.
+	function updateScrollbarsInner(cm, measure) {
+	  var d = cm.display
+	  var sizes = d.scrollbars.update(measure)
+
+	  d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"
+	  d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"
+	  d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
+
+	  if (sizes.right && sizes.bottom) {
+	    d.scrollbarFiller.style.display = "block"
+	    d.scrollbarFiller.style.height = sizes.bottom + "px"
+	    d.scrollbarFiller.style.width = sizes.right + "px"
+	  } else { d.scrollbarFiller.style.display = "" }
+	  if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+	    d.gutterFiller.style.display = "block"
+	    d.gutterFiller.style.height = sizes.bottom + "px"
+	    d.gutterFiller.style.width = measure.gutterWidth + "px"
+	  } else { d.gutterFiller.style.display = "" }
+	}
+
+	var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars}
+
+	function initScrollbars(cm) {
+	  if (cm.display.scrollbars) {
+	    cm.display.scrollbars.clear()
+	    if (cm.display.scrollbars.addClass)
+	      { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+	  }
+
+	  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+	    cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller)
+	    // Prevent clicks in the scrollbars from killing focus
+	    on(node, "mousedown", function () {
+	      if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0) }
+	    })
+	    node.setAttribute("cm-not-content", "true")
+	  }, function (pos, axis) {
+	    if (axis == "horizontal") { setScrollLeft(cm, pos) }
+	    else { updateScrollTop(cm, pos) }
+	  }, cm)
+	  if (cm.display.scrollbars.addClass)
+	    { addClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+	}
+
+	// Operations are used to wrap a series of changes to the editor
+	// state in such a way that each change won't have to update the
+	// cursor and display (which would be awkward, slow, and
+	// error-prone). Instead, display updates are batched and then all
+	// combined and executed at once.
+
+	var nextOpId = 0
+	// Start a new operation.
+	function startOperation(cm) {
+	  cm.curOp = {
+	    cm: cm,
+	    viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+	    startHeight: cm.doc.height, // Used to detect need to update scrollbar
+	    forceUpdate: false,      // Used to force a redraw
+	    updateInput: null,       // Whether to reset the input textarea
+	    typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+	    changeObjs: null,        // Accumulated changes, for firing change events
+	    cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+	    cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+	    selectionChanged: false, // Whether the selection needs to be redrawn
+	    updateMaxLine: false,    // Set when the widest line needs to be determined anew
+	    scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+	    scrollToPos: null,       // Used to scroll to a specific position
+	    focus: false,
+	    id: ++nextOpId           // Unique ID
+	  }
+	  pushOperation(cm.curOp)
+	}
+
+	// Finish an operation, updating the display and signalling delayed events
+	function endOperation(cm) {
+	  var op = cm.curOp
+	  finishOperation(op, function (group) {
+	    for (var i = 0; i < group.ops.length; i++)
+	      { group.ops[i].cm.curOp = null }
+	    endOperations(group)
+	  })
+	}
+
+	// The DOM updates done when an operation finishes are batched so
+	// that the minimum number of relayouts are required.
+	function endOperations(group) {
+	  var ops = group.ops
+	  for (var i = 0; i < ops.length; i++) // Read DOM
+	    { endOperation_R1(ops[i]) }
+	  for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+	    { endOperation_W1(ops[i$1]) }
+	  for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+	    { endOperation_R2(ops[i$2]) }
+	  for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+	    { endOperation_W2(ops[i$3]) }
+	  for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+	    { endOperation_finish(ops[i$4]) }
+	}
+
+	function endOperation_R1(op) {
+	  var cm = op.cm, display = cm.display
+	  maybeClipScrollbars(cm)
+	  if (op.updateMaxLine) { findMaxLine(cm) }
+
+	  op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+	    op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+	                       op.scrollToPos.to.line >= display.viewTo) ||
+	    display.maxLineChanged && cm.options.lineWrapping
+	  op.update = op.mustUpdate &&
+	    new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate)
+	}
+
+	function endOperation_W1(op) {
+	  op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update)
+	}
+
+	function endOperation_R2(op) {
+	  var cm = op.cm, display = cm.display
+	  if (op.updatedDisplay) { updateHeightsInViewport(cm) }
+
+	  op.barMeasure = measureForScrollbars(cm)
+
+	  // If the max line changed since it was last measured, measure it,
+	  // and ensure the document's width matches it.
+	  // updateDisplay_W2 will use these properties to do the actual resizing
+	  if (display.maxLineChanged && !cm.options.lineWrapping) {
+	    op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3
+	    cm.display.sizerWidth = op.adjustWidthTo
+	    op.barMeasure.scrollWidth =
+	      Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth)
+	    op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm))
+	  }
+
+	  if (op.updatedDisplay || op.selectionChanged)
+	    { op.preparedSelection = display.input.prepareSelection(op.focus) }
+	}
+
+	function endOperation_W2(op) {
+	  var cm = op.cm
+
+	  if (op.adjustWidthTo != null) {
+	    cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"
+	    if (op.maxScrollLeft < cm.doc.scrollLeft)
+	      { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true) }
+	    cm.display.maxLineChanged = false
+	  }
+
+	  var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
+	  if (op.preparedSelection)
+	    { cm.display.input.showSelection(op.preparedSelection, takeFocus) }
+	  if (op.updatedDisplay || op.startHeight != cm.doc.height)
+	    { updateScrollbars(cm, op.barMeasure) }
+	  if (op.updatedDisplay)
+	    { setDocumentHeight(cm, op.barMeasure) }
+
+	  if (op.selectionChanged) { restartBlink(cm) }
+
+	  if (cm.state.focused && op.updateInput)
+	    { cm.display.input.reset(op.typing) }
+	  if (takeFocus) { ensureFocus(op.cm) }
+	}
+
+	function endOperation_finish(op) {
+	  var cm = op.cm, display = cm.display, doc = cm.doc
+
+	  if (op.updatedDisplay) { postUpdateDisplay(cm, op.update) }
+
+	  // Abort mouse wheel delta measurement, when scrolling explicitly
+	  if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+	    { display.wheelStartX = display.wheelStartY = null }
+
+	  // Propagate the scroll position to the actual DOM scroller
+	  if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll) }
+
+	  if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true) }
+	  // If we need to scroll a specific position into view, do so.
+	  if (op.scrollToPos) {
+	    var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+	                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin)
+	    maybeScrollWindow(cm, rect)
+	  }
+
+	  // Fire events for markers that are hidden/unidden by editing or
+	  // undoing
+	  var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers
+	  if (hidden) { for (var i = 0; i < hidden.length; ++i)
+	    { if (!hidden[i].lines.length) { signal(hidden[i], "hide") } } }
+	  if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+	    { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide") } } }
+
+	  if (display.wrapper.offsetHeight)
+	    { doc.scrollTop = cm.display.scroller.scrollTop }
+
+	  // Fire change events, and delayed event handlers
+	  if (op.changeObjs)
+	    { signal(cm, "changes", cm, op.changeObjs) }
+	  if (op.update)
+	    { op.update.finish() }
+	}
+
+	// Run the given function in an operation
+	function runInOp(cm, f) {
+	  if (cm.curOp) { return f() }
+	  startOperation(cm)
+	  try { return f() }
+	  finally { endOperation(cm) }
+	}
+	// Wraps a function in an operation. Returns the wrapped function.
+	function operation(cm, f) {
+	  return function() {
+	    if (cm.curOp) { return f.apply(cm, arguments) }
+	    startOperation(cm)
+	    try { return f.apply(cm, arguments) }
+	    finally { endOperation(cm) }
+	  }
+	}
+	// Used to add methods to editor and doc instances, wrapping them in
+	// operations.
+	function methodOp(f) {
+	  return function() {
+	    if (this.curOp) { return f.apply(this, arguments) }
+	    startOperation(this)
+	    try { return f.apply(this, arguments) }
+	    finally { endOperation(this) }
+	  }
+	}
+	function docMethodOp(f) {
+	  return function() {
+	    var cm = this.cm
+	    if (!cm || cm.curOp) { return f.apply(this, arguments) }
+	    startOperation(cm)
+	    try { return f.apply(this, arguments) }
+	    finally { endOperation(cm) }
+	  }
+	}
+
+	// Updates the display.view data structure for a given change to the
+	// document. From and to are in pre-change coordinates. Lendiff is
+	// the amount of lines added or subtracted by the change. This is
+	// used for changes that span multiple lines, or change the way
+	// lines are divided into visual lines. regLineChange (below)
+	// registers single-line changes.
+	function regChange(cm, from, to, lendiff) {
+	  if (from == null) { from = cm.doc.first }
+	  if (to == null) { to = cm.doc.first + cm.doc.size }
+	  if (!lendiff) { lendiff = 0 }
+
+	  var display = cm.display
+	  if (lendiff && to < display.viewTo &&
+	      (display.updateLineNumbers == null || display.updateLineNumbers > from))
+	    { display.updateLineNumbers = from }
+
+	  cm.curOp.viewChanged = true
+
+	  if (from >= display.viewTo) { // Change after
+	    if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+	      { resetView(cm) }
+	  } else if (to <= display.viewFrom) { // Change before
+	    if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+	      resetView(cm)
 	    } else {
-	      return new Range(other || head, head);
-	    }
-	  }
-
-	  // Extend the primary selection range, discard the rest.
-	  function extendSelection(doc, head, other, options) {
-	    setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options);
-	  }
-
-	  // Extend all selections (pos is an array of selections with length
-	  // equal the number of selections)
-	  function extendSelections(doc, heads, options) {
-	    for (var out = [], i = 0; i < doc.sel.ranges.length; i++)
-	      out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null);
-	    var newSel = normalizeSelection(out, doc.sel.primIndex);
-	    setSelection(doc, newSel, options);
-	  }
-
-	  // Updates a single range in the selection.
-	  function replaceOneSelection(doc, i, range, options) {
-	    var ranges = doc.sel.ranges.slice(0);
-	    ranges[i] = range;
-	    setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
-	  }
-
-	  // Reset the selection to a single range.
-	  function setSimpleSelection(doc, anchor, head, options) {
-	    setSelection(doc, simpleSelection(anchor, head), options);
-	  }
-
-	  // Give beforeSelectionChange handlers a change to influence a
-	  // selection update.
-	  function filterSelectionChange(doc, sel, options) {
-	    var obj = {
-	      ranges: sel.ranges,
-	      update: function(ranges) {
-	        this.ranges = [];
-	        for (var i = 0; i < ranges.length; i++)
-	          this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
-	                                     clipPos(doc, ranges[i].head));
-	      },
-	      origin: options && options.origin
-	    };
-	    signal(doc, "beforeSelectionChange", doc, obj);
-	    if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
-	    if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1);
-	    else return sel;
-	  }
-
-	  function setSelectionReplaceHistory(doc, sel, options) {
-	    var done = doc.history.done, last = lst(done);
-	    if (last && last.ranges) {
-	      done[done.length - 1] = sel;
-	      setSelectionNoUndo(doc, sel, options);
+	      display.viewFrom += lendiff
+	      display.viewTo += lendiff
+	    }
+	  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+	    resetView(cm)
+	  } else if (from <= display.viewFrom) { // Top overlap
+	    var cut = viewCuttingPoint(cm, to, to + lendiff, 1)
+	    if (cut) {
+	      display.view = display.view.slice(cut.index)
+	      display.viewFrom = cut.lineN
+	      display.viewTo += lendiff
+	    } else {
+	      resetView(cm)
+	    }
+	  } else if (to >= display.viewTo) { // Bottom overlap
+	    var cut$1 = viewCuttingPoint(cm, from, from, -1)
+	    if (cut$1) {
+	      display.view = display.view.slice(0, cut$1.index)
+	      display.viewTo = cut$1.lineN
+	    } else {
+	      resetView(cm)
+	    }
+	  } else { // Gap in the middle
+	    var cutTop = viewCuttingPoint(cm, from, from, -1)
+	    var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1)
+	    if (cutTop && cutBot) {
+	      display.view = display.view.slice(0, cutTop.index)
+	        .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+	        .concat(display.view.slice(cutBot.index))
+	      display.viewTo += lendiff
 	    } else {
-	      setSelection(doc, sel, options);
-	    }
-	  }
-
-	  // Set a new selection.
-	  function setSelection(doc, sel, options) {
-	    setSelectionNoUndo(doc, sel, options);
-	    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
-	  }
-
-	  function setSelectionNoUndo(doc, sel, options) {
-	    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
-	      sel = filterSelectionChange(doc, sel, options);
-
-	    var bias = options && options.bias ||
-	      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
-	    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
-
-	    if (!(options && options.scroll === false) && doc.cm)
-	      ensureCursorVisible(doc.cm);
-	  }
-
-	  function setSelectionInner(doc, sel) {
-	    if (sel.equals(doc.sel)) return;
-
-	    doc.sel = sel;
-
-	    if (doc.cm) {
-	      doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
-	      signalCursorActivity(doc.cm);
-	    }
-	    signalLater(doc, "cursorActivity", doc);
-	  }
-
-	  // Verify that the selection does not partially select any atomic
-	  // marked ranges.
-	  function reCheckSelection(doc) {
-	    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll);
-	  }
-
-	  // Return a selection that does not partially select any atomic
-	  // ranges.
-	  function skipAtomicInSelection(doc, sel, bias, mayClear) {
-	    var out;
-	    for (var i = 0; i < sel.ranges.length; i++) {
-	      var range = sel.ranges[i];
-	      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
-	      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
-	      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
-	      if (out || newAnchor != range.anchor || newHead != range.head) {
-	        if (!out) out = sel.ranges.slice(0, i);
-	        out[i] = new Range(newAnchor, newHead);
-	      }
-	    }
-	    return out ? normalizeSelection(out, sel.primIndex) : sel;
-	  }
-
-	  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
-	    var line = getLine(doc, pos.line);
-	    if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
-	      var sp = line.markedSpans[i], m = sp.marker;
-	      if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
-	          (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
-	        if (mayClear) {
-	          signal(m, "beforeCursorEnter");
-	          if (m.explicitlyCleared) {
-	            if (!line.markedSpans) break;
-	            else {--i; continue;}
-	          }
-	        }
-	        if (!m.atomic) continue;
-
-	        if (oldPos) {
-	          var near = m.find(dir < 0 ? 1 : -1), diff;
-	          if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
-	            near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null);
-	          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
-	            return skipAtomicInner(doc, near, pos, dir, mayClear);
-	        }
-
-	        var far = m.find(dir < 0 ? -1 : 1);
-	        if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
-	          far = movePos(doc, far, dir, far.line == pos.line ? line : null);
-	        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null;
-	      }
-	    }
-	    return pos;
-	  }
-
-	  // Ensure a given position is not inside an atomic range.
-	  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
-	    var dir = bias || 1;
-	    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
-	        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
-	        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
-	        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
-	    if (!found) {
-	      doc.cantEdit = true;
-	      return Pos(doc.first, 0);
-	    }
-	    return found;
-	  }
-
-	  function movePos(doc, pos, dir, line) {
-	    if (dir < 0 && pos.ch == 0) {
-	      if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1));
-	      else return null;
-	    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
-	      if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0);
-	      else return null;
-	    } else {
-	      return new Pos(pos.line, pos.ch + dir);
-	    }
-	  }
-
-	  // SELECTION DRAWING
-
-	  function updateSelection(cm) {
-	    cm.display.input.showSelection(cm.display.input.prepareSelection());
-	  }
-
-	  function prepareSelection(cm, primary) {
-	    var doc = cm.doc, result = {};
-	    var curFragment = result.cursors = document.createDocumentFragment();
-	    var selFragment = result.selection = document.createDocumentFragment();
-
-	    for (var i = 0; i < doc.sel.ranges.length; i++) {
-	      if (primary === false && i == doc.sel.primIndex) continue;
-	      var range = doc.sel.ranges[i];
-	      if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue;
-	      var collapsed = range.empty();
-	      if (collapsed || cm.options.showCursorWhenSelecting)
-	        drawSelectionCursor(cm, range.head, curFragment);
-	      if (!collapsed)
-	        drawSelectionRange(cm, range, selFragment);
-	    }
-	    return result;
-	  }
-
-	  // Draws a cursor for the given range
-	  function drawSelectionCursor(cm, head, output) {
-	    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
-
-	    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
-	    cursor.style.left = pos.left + "px";
-	    cursor.style.top = pos.top + "px";
-	    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
-
-	    if (pos.other) {
-	      // Secondary cursor, shown when on a 'jump' in bi-directional text
-	      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
-	      otherCursor.style.display = "";
-	      otherCursor.style.left = pos.other.left + "px";
-	      otherCursor.style.top = pos.other.top + "px";
-	      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
-	    }
-	  }
-
-	  // Draws the given range as a highlighted selection
-	  function drawSelectionRange(cm, range, output) {
-	    var display = cm.display, doc = cm.doc;
-	    var fragment = document.createDocumentFragment();
-	    var padding = paddingH(cm.display), leftSide = padding.left;
-	    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
-
-	    function add(left, top, width, bottom) {
-	      if (top < 0) top = 0;
-	      top = Math.round(top);
-	      bottom = Math.round(bottom);
-	      fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
-	                               "px; top: " + top + "px; width: " + (width == null ? rightSide - left : width) +
-	                               "px; height: " + (bottom - top) + "px"));
-	    }
-
-	    function drawForLine(line, fromArg, toArg) {
-	      var lineObj = getLine(doc, line);
-	      var lineLen = lineObj.text.length;
-	      var start, end;
-	      function coords(ch, bias) {
-	        return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
-	      }
-
-	      iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
-	        var leftPos = coords(from, "left"), rightPos, left, right;
-	        if (from == to) {
-	          rightPos = leftPos;
-	          left = right = leftPos.left;
-	        } else {
-	          rightPos = coords(to - 1, "right");
-	          if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
-	          left = leftPos.left;
-	          right = rightPos.right;
-	        }
-	        if (fromArg == null && from == 0) left = leftSide;
-	        if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
-	          add(left, leftPos.top, null, leftPos.bottom);
-	          left = leftSide;
-	          if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
-	        }
-	        if (toArg == null && to == lineLen) right = rightSide;
-	        if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
-	          start = leftPos;
-	        if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
-	          end = rightPos;
-	        if (left < leftSide + 1) left = leftSide;
-	        add(left, rightPos.top, right - left, rightPos.bottom);
-	      });
-	      return {start: start, end: end};
-	    }
-
-	    var sFrom = range.from(), sTo = range.to();
-	    if (sFrom.line == sTo.line) {
-	      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
+	      resetView(cm)
+	    }
+	  }
+
+	  var ext = display.externalMeasured
+	  if (ext) {
+	    if (to < ext.lineN)
+	      { ext.lineN += lendiff }
+	    else if (from < ext.lineN + ext.size)
+	      { display.externalMeasured = null }
+	  }
+	}
+
+	// Register a change to a single line. Type must be one of "text",
+	// "gutter", "class", "widget"
+	function regLineChange(cm, line, type) {
+	  cm.curOp.viewChanged = true
+	  var display = cm.display, ext = cm.display.externalMeasured
+	  if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+	    { display.externalMeasured = null }
+
+	  if (line < display.viewFrom || line >= display.viewTo) { return }
+	  var lineView = display.view[findViewIndex(cm, line)]
+	  if (lineView.node == null) { return }
+	  var arr = lineView.changes || (lineView.changes = [])
+	  if (indexOf(arr, type) == -1) { arr.push(type) }
+	}
+
+	// Clear the view.
+	function resetView(cm) {
+	  cm.display.viewFrom = cm.display.viewTo = cm.doc.first
+	  cm.display.view = []
+	  cm.display.viewOffset = 0
+	}
+
+	function viewCuttingPoint(cm, oldN, newN, dir) {
+	  var index = findViewIndex(cm, oldN), diff, view = cm.display.view
+	  if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+	    { return {index: index, lineN: newN} }
+	  var n = cm.display.viewFrom
+	  for (var i = 0; i < index; i++)
+	    { n += view[i].size }
+	  if (n != oldN) {
+	    if (dir > 0) {
+	      if (index == view.length - 1) { return null }
+	      diff = (n + view[index].size) - oldN
+	      index++
 	    } else {
-	      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
-	      var singleVLine = visualLine(fromLine) == visualLine(toLine);
-	      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
-	      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
-	      if (singleVLine) {
-	        if (leftEnd.top < rightStart.top - 2) {
-	          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
-	          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
-	        } else {
-	          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
-	        }
-	      }
-	      if (leftEnd.bottom < rightStart.top)
-	        add(leftSide, leftEnd.bottom, null, rightStart.top);
-	    }
-
-	    output.appendChild(fragment);
-	  }
-
-	  // Cursor-blinking
-	  function restartBlink(cm) {
-	    if (!cm.state.focused) return;
-	    var display = cm.display;
-	    clearInterval(display.blinker);
-	    var on = true;
-	    display.cursorDiv.style.visibility = "";
-	    if (cm.options.cursorBlinkRate > 0)
-	      display.blinker = setInterval(function() {
-	        display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
-	      }, cm.options.cursorBlinkRate);
-	    else if (cm.options.cursorBlinkRate < 0)
-	      display.cursorDiv.style.visibility = "hidden";
-	  }
-
-	  // HIGHLIGHT WORKER
-
-	  function startWorker(cm, time) {
-	    if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
-	      cm.state.highlight.set(time, bind(highlightWorker, cm));
-	  }
-
-	  function highlightWorker(cm) {
-	    var doc = cm.doc;
-	    if (doc.frontier < doc.first) doc.frontier = doc.first;
-	    if (doc.frontier >= cm.display.viewTo) return;
-	    var end = +new Date + cm.options.workTime;
-	    var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
-	    var changedLines = [];
-
-	    doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) {
-	      if (doc.frontier >= cm.display.viewFrom) { // Visible
-	        var oldStyles = line.styles, tooLong = line.text.length > cm.options.maxHighlightLength;
-	        var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true);
-	        line.styles = highlighted.styles;
-	        var oldCls = line.styleClasses, newCls = highlighted.classes;
-	        if (newCls) line.styleClasses = newCls;
-	        else if (oldCls) line.styleClasses = null;
-	        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
-	          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
-	        for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
-	        if (ischange) changedLines.push(doc.frontier);
-	        line.stateAfter = tooLong ? state : copyState(doc.mode, state);
-	      } else {
-	        if (line.text.length <= cm.options.maxHighlightLength)
-	          processLine(cm, line.text, state);
-	        line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
-	      }
-	      ++doc.frontier;
-	      if (+new Date > end) {
-	        startWorker(cm, cm.options.workDelay);
-	        return true;
-	      }
-	    });
-	    if (changedLines.length) runInOp(cm, function() {
-	      for (var i = 0; i < changedLines.length; i++)
-	        regLineChange(cm, changedLines[i], "text");
-	    });
-	  }
-
-	  // Finds the line to start with when starting a parse. Tries to
-	  // find a line with a stateAfter, so that it can start with a
-	  // valid state. If that fails, it returns the line with the
-	  // smallest indentation, which tends to need the least context to
-	  // parse correctly.
-	  function findStartLine(cm, n, precise) {
-	    var minindent, minline, doc = cm.doc;
-	    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
-	    for (var search = n; search > lim; --search) {
-	      if (search <= doc.first) return doc.first;
-	      var line = getLine(doc, search - 1);
-	      if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
-	      var indented = countColumn(line.text, null, cm.options.tabSize);
-	      if (minline == null || minindent > indented) {
-	        minline = search - 1;
-	        minindent = indented;
-	      }
-	    }
-	    return minline;
-	  }
-
-	  function getStateBefore(cm, n, precise) {
-	    var doc = cm.doc, display = cm.display;
-	    if (!doc.mode.startState) return true;
-	    var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
-	    if (!state) state = startState(doc.mode);
-	    else state = copyState(doc.mode, state);
-	    doc.iter(pos, n, function(line) {
-	      processLine(cm, line.text, state);
-	      var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo;
-	      line.stateAfter = save ? copyState(doc.mode, state) : null;
-	      ++pos;
-	    });
-	    if (precise) doc.frontier = pos;
-	    return state;
-	  }
-
-	  // POSITION MEASUREMENT
-
-	  function paddingTop(display) {return display.lineSpace.offsetTop;}
-	  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
-	  function paddingH(display) {
-	    if (display.cachedPaddingH) return display.cachedPaddingH;
-	    var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
-	    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
-	    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
-	    if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data;
-	    return data;
-	  }
-
-	  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth; }
-	  function displayWidth(cm) {
-	    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth;
-	  }
-	  function displayHeight(cm) {
-	    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight;
-	  }
-
-	  // Ensure the lineView.wrapping.heights array is populated. This is
-	  // an array of bottom offsets for the lines that make up a drawn
-	  // line. When lineWrapping is on, there might be more than one
-	  // height.
-	  function ensureLineHeights(cm, lineView, rect) {
-	    var wrapping = cm.options.lineWrapping;
-	    var curWidth = wrapping && displayWidth(cm);
-	    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
-	      var heights = lineView.measure.heights = [];
-	      if (wrapping) {
-	        lineView.measure.width = curWidth;
-	        var rects = lineView.text.firstChild.getClientRects();
-	        for (var i = 0; i < rects.length - 1; i++) {
-	          var cur = rects[i], next = rects[i + 1];
-	          if (Math.abs(cur.bottom - next.bottom) > 2)
-	            heights.push((cur.bottom + next.top) / 2 - rect.top);
-	        }
-	      }
-	      heights.push(rect.bottom - rect.top);
-	    }
-	  }
-
-	  // Find a line map (mapping character offsets to text nodes) and a
-	  // measurement cache for the given line number. (A line view might
-	  // contain multiple lines when collapsed ranges are present.)
-	  function mapFromLineView(lineView, line, lineN) {
-	    if (lineView.line == line)
-	      return {map: lineView.measure.map, cache: lineView.measure.cache};
-	    for (var i = 0; i < lineView.rest.length; i++)
-	      if (lineView.rest[i] == line)
-	        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]};
-	    for (var i = 0; i < lineView.rest.length; i++)
-	      if (lineNo(lineView.rest[i]) > lineN)
-	        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i], before: true};
-	  }
-
-	  // Render a line into the hidden node display.externalMeasured. Used
-	  // when measurement is needed for a line that's not in the viewport.
-	  function updateExternalMeasurement(cm, line) {
-	    line = visualLine(line);
-	    var lineN = lineNo(line);
-	    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
-	    view.lineN = lineN;
-	    var built = view.built = buildLineContent(cm, view);
-	    view.text = built.pre;
-	    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
-	    return view;
-	  }
-
-	  // Get a {top, bottom, left, right} box (in line-local coordinates)
-	  // for a given character.
-	  function measureChar(cm, line, ch, bias) {
-	    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias);
-	  }
-
-	  // Find a line view that corresponds to the given line number.
-	  function findViewForLine(cm, lineN) {
-	    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
-	      return cm.display.view[findViewIndex(cm, lineN)];
-	    var ext = cm.display.externalMeasured;
-	    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
-	      return ext;
-	  }
-
-	  // Measurement can be split in two steps, the set-up work that
-	  // applies to the whole line, and the measurement of the actual
-	  // character. Functions like coordsChar, that need to do a lot of
-	  // measurements in a row, can thus ensure that the set-up work is
-	  // only done once.
-	  function prepareMeasureForLine(cm, line) {
-	    var lineN = lineNo(line);
-	    var view = findViewForLine(cm, lineN);
-	    if (view && !view.text) {
-	      view = null;
-	    } else if (view && view.changes) {
-	      updateLineForChanges(cm, view, lineN, getDimensions(cm));
-	      cm.curOp.forceUpdate = true;
-	    }
-	    if (!view)
-	      view = updateExternalMeasurement(cm, line);
-
-	    var info = mapFromLineView(view, line, lineN);
-	    return {
-	      line: line, view: view, rect: null,
-	      map: info.map, cache: info.cache, before: info.before,
-	      hasHeights: false
-	    };
-	  }
-
-	  // Given a prepared measurement object, measures the position of an
-	  // actual character (or fetches it from the cache).
-	  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
-	    if (prepared.before) ch = -1;
-	    var key = ch + (bias || ""), found;
-	    if (prepared.cache.hasOwnProperty(key)) {
-	      found = prepared.cache[key];
+	      diff = n - oldN
+	    }
+	    oldN += diff; newN += diff
+	  }
+	  while (visualLineNo(cm.doc, newN) != newN) {
+	    if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+	    newN += dir * view[index - (dir < 0 ? 1 : 0)].size
+	    index += dir
+	  }
+	  return {index: index, lineN: newN}
+	}
+
+	// Force the view to cover a given range, adding empty view element
+	// or clipping off existing ones as needed.
+	function adjustView(cm, from, to) {
+	  var display = cm.display, view = display.view
+	  if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+	    display.view = buildViewArray(cm, from, to)
+	    display.viewFrom = from
+	  } else {
+	    if (display.viewFrom > from)
+	      { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view) }
+	    else if (display.viewFrom < from)
+	      { display.view = display.view.slice(findViewIndex(cm, from)) }
+	    display.viewFrom = from
+	    if (display.viewTo < to)
+	      { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)) }
+	    else if (display.viewTo > to)
+	      { display.view = display.view.slice(0, findViewIndex(cm, to)) }
+	  }
+	  display.viewTo = to
+	}
+
+	// Count the number of lines in the view whose DOM representation is
+	// out of date (or nonexistent).
+	function countDirtyView(cm) {
+	  var view = cm.display.view, dirty = 0
+	  for (var i = 0; i < view.length; i++) {
+	    var lineView = view[i]
+	    if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty }
+	  }
+	  return dirty
+	}
+
+	// HIGHLIGHT WORKER
+
+	function startWorker(cm, time) {
+	  if (cm.doc.highlightFrontier < cm.display.viewTo)
+	    { cm.state.highlight.set(time, bind(highlightWorker, cm)) }
+	}
+
+	function highlightWorker(cm) {
+	  var doc = cm.doc
+	  if (doc.highlightFrontier >= cm.display.viewTo) { return }
+	  var end = +new Date + cm.options.workTime
+	  var context = getContextBefore(cm, doc.highlightFrontier)
+	  var changedLines = []
+
+	  doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+	    if (context.line >= cm.display.viewFrom) { // Visible
+	      var oldStyles = line.styles
+	      var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
+	      var highlighted = highlightLine(cm, line, context, true)
+	      if (resetState) { context.state = resetState }
+	      line.styles = highlighted.styles
+	      var oldCls = line.styleClasses, newCls = highlighted.classes
+	      if (newCls) { line.styleClasses = newCls }
+	      else if (oldCls) { line.styleClasses = null }
+	      var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+	        oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
+	      for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i] }
+	      if (ischange) { changedLines.push(context.line) }
+	      line.stateAfter = context.save()
+	      context.nextLine()
 	    } else {
-	      if (!prepared.rect)
-	        prepared.rect = prepared.view.text.getBoundingClientRect();
-	      if (!prepared.hasHeights) {
-	        ensureLineHeights(cm, prepared.view, prepared.rect);
-	        prepared.hasHeights = true;
-	      }
-	      found = measureCharInner(cm, prepared, ch, bias);
-	      if (!found.bogus) prepared.cache[key] = found;
-	    }
-	    return {left: found.left, right: found.right,
-	            top: varHeight ? found.rtop : found.top,
-	            bottom: varHeight ? found.rbottom : found.bottom};
-	  }
-
-	  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
-
-	  function nodeAndOffsetInLineMap(map, ch, bias) {
-	    var node, start, end, collapse;
-	    // First, search the line map for the text node corresponding to,
-	    // or closest to, the target character.
-	    for (var i = 0; i < map.length; i += 3) {
-	      var mStart = map[i], mEnd = map[i + 1];
-	      if (ch < mStart) {
-	        start = 0; end = 1;
-	        collapse = "left";
-	      } else if (ch < mEnd) {
-	        start = ch - mStart;
-	        end = start + 1;
-	      } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
-	        end = mEnd - mStart;
-	        start = end - 1;
-	        if (ch >= mEnd) collapse = "right";
-	      }
-	      if (start != null) {
-	        node = map[i + 2];
-	        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
-	          collapse = bias;
-	        if (bias == "left" && start == 0)
-	          while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
-	            node = map[(i -= 3) + 2];
-	            collapse = "left";
-	          }
-	        if (bias == "right" && start == mEnd - mStart)
-	          while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
-	            node = map[(i += 3) + 2];
-	            collapse = "right";
-	          }
-	        break;
-	      }
-	    }
-	    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd};
-	  }
-
-	  function measureCharInner(cm, prepared, ch, bias) {
-	    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
-	    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
-
-	    var rect;
-	    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
-	      for (var i = 0; i < 4; i++) { // Retry a maximum of 4 times when nonsense rectangles are returned
-	        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) --start;
-	        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) ++end;
-	        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart) {
-	          rect = node.parentNode.getBoundingClientRect();
-	        } else if (ie && cm.options.lineWrapping) {
-	          var rects = range(node, start, end).getClientRects();
-	          if (rects.length)
-	            rect = rects[bias == "right" ? rects.length - 1 : 0];
-	          else
-	            rect = nullRect;
-	        } else {
-	          rect = range(node, start, end).getBoundingClientRect() || nullRect;
-	        }
-	        if (rect.left || rect.right || start == 0) break;
-	        end = start;
-	        start = start - 1;
-	        collapse = "right";
-	      }
-	      if (ie && ie_version < 11) rect = maybeUpdateRectForZooming(cm.display.measure, rect);
-	    } else { // If it is a widget, simply get the box for the whole widget.
-	      if (start > 0) collapse = bias = "right";
-	      var rects;
-	      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
-	        rect = rects[bias == "right" ? rects.length - 1 : 0];
-	      else
-	        rect = node.getBoundingClientRect();
-	    }
-	    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
-	      var rSpan = node.parentNode.getClientRects()[0];
-	      if (rSpan)
-	        rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom};
-	      else
-	        rect = nullRect;
-	    }
-
-	    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
-	    var mid = (rtop + rbot) / 2;
-	    var heights = prepared.view.measure.heights;
-	    for (var i = 0; i < heights.length - 1; i++)
-	      if (mid < heights[i]) break;
-	    var top = i ? heights[i - 1] : 0, bot = heights[i];
-	    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
-	                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
-	                  top: top, bottom: bot};
-	    if (!rect.left && !rect.right) result.bogus = true;
-	    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
-
-	    return result;
-	  }
-
-	  // Work around problem with bounding client rects on ranges being
-	  // returned incorrectly when zoomed on IE10 and below.
-	  function maybeUpdateRectForZooming(measure, rect) {
-	    if (!window.screen || screen.logicalXDPI == null ||
-	        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
-	      return rect;
-	    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
-	    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
-	    return {left: rect.left * scaleX, right: rect.right * scaleX,
-	            top: rect.top * scaleY, bottom: rect.bottom * scaleY};
-	  }
-
-	  function clearLineMeasurementCacheFor(lineView) {
-	    if (lineView.measure) {
-	      lineView.measure.cache = {};
-	      lineView.measure.heights = null;
-	      if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
-	        lineView.measure.caches[i] = {};
-	    }
-	  }
-
-	  function clearLineMeasurementCache(cm) {
-	    cm.display.externalMeasure = null;
-	    removeChildren(cm.display.lineMeasure);
-	    for (var i = 0; i < cm.display.view.length; i++)
-	      clearLineMeasurementCacheFor(cm.display.view[i]);
-	  }
-
-	  function clearCaches(cm) {
-	    clearLineMeasurementCache(cm);
-	    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
-	    if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
-	    cm.display.lineNumChars = null;
-	  }
-
-	  function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
-	  function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
-
-	  // Converts a {top, bottom, left, right} box from line-local
-	  // coordinates into another coordinate system. Context may be one of
-	  // "line", "div" (display.lineDiv), "local"/null (editor), "window",
-	  // or "page".
-	  function intoCoordSystem(cm, lineObj, rect, context) {
-	    if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
-	      var size = widgetHeight(lineObj.widgets[i]);
-	      rect.top += size; rect.bottom += size;
-	    }
-	    if (context == "line") return rect;
-	    if (!context) context = "local";
-	    var yOff = heightAtLine(lineObj);
-	    if (context == "local") yOff += paddingTop(cm.display);
-	    else yOff -= cm.display.viewOffset;
-	    if (context == "page" || context == "window") {
-	      var lOff = cm.display.lineSpace.getBoundingClientRect();
-	      yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
-	      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
-	      rect.left += xOff; rect.right += xOff;
-	    }
-	    rect.top += yOff; rect.bottom += yOff;
-	    return rect;
-	  }
-
-	  // Coverts a box from "div" coords to another coordinate system.
-	  // Context may be "window", "page", "div", or "local"/null.
-	  function fromCoordSystem(cm, coords, context) {
-	    if (context == "div") return coords;
-	    var left = coords.left, top = coords.top;
-	    // First move into "page" coordinate system
-	    if (context == "page") {
-	      left -= pageScrollX();
-	      top -= pageScrollY();
-	    } else if (context == "local" || !context) {
-	      var localBox = cm.display.sizer.getBoundingClientRect();
-	      left += localBox.left;
-	      top += localBox.top;
-	    }
-
-	    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
-	    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
-	  }
-
-	  function charCoords(cm, pos, context, lineObj, bias) {
-	    if (!lineObj) lineObj = getLine(cm.doc, pos.line);
-	    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context);
-	  }
-
-	  // Returns a box for a given cursor position, which may have an
-	  // 'other' property containing the position of the secondary cursor
-	  // on a bidi boundary.
-	  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
-	    lineObj = lineObj || getLine(cm.doc, pos.line);
-	    if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj);
-	    function get(ch, right) {
-	      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
-	      if (right) m.left = m.right; else m.right = m.left;
-	      return intoCoordSystem(cm, lineObj, m, context);
-	    }
-	    function getBidi(ch, partPos) {
-	      var part = order[partPos], right = part.level % 2;
-	      if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
-	        part = order[--partPos];
-	        ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
-	        right = true;
-	      } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
-	        part = order[++partPos];
-	        ch = bidiLeft(part) - part.level % 2;
-	        right = false;
-	      }
-	      if (right && ch == part.to && ch > part.from) return get(ch - 1);
-	      return get(ch, right);
-	    }
-	    var order = getOrder(lineObj), ch = pos.ch;
-	    if (!order) return get(ch);
-	    var partPos = getBidiPartAt(order, ch);
-	    var val = getBidi(ch, partPos);
-	    if (bidiOther != null) val.other = getBidi(ch, bidiOther);
-	    return val;
-	  }
-
-	  // Used to cheaply estimate the coordinates for a position. Used for
-	  // intermediate scroll updates.
-	  function estimateCoords(cm, pos) {
-	    var left = 0, pos = clipPos(cm.doc, pos);
-	    if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch;
-	    var lineObj = getLine(cm.doc, pos.line);
-	    var top = heightAtLine(lineObj) + paddingTop(cm.display);
-	    return {left: left, right: left, top: top, bottom: top + lineObj.height};
-	  }
-
-	  // Positions returned by coordsChar contain some extra information.
-	  // xRel is the relative x position of the input coordinates compared
-	  // to the found position (so xRel > 0 means the coordinates are to
-	  // the right of the character position, for example). When outside
-	  // is true, that means the coordinates lie outside the line's
-	  // vertical range.
-	  function PosWithInfo(line, ch, outside, xRel) {
-	    var pos = Pos(line, ch);
-	    pos.xRel = xRel;
-	    if (outside) pos.outside = true;
-	    return pos;
-	  }
-
-	  // Compute the character position closest to the given coordinates.
-	  // Input must be lineSpace-local ("div" coordinate system).
-	  function coordsChar(cm, x, y) {
-	    var doc = cm.doc;
-	    y += cm.display.viewOffset;
-	    if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
-	    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
-	    if (lineN > last)
-	      return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
-	    if (x < 0) x = 0;
-
-	    var lineObj = getLine(doc, lineN);
-	    for (;;) {
-	      var found = coordsCharInner(cm, lineObj, lineN, x, y);
-	      var merged = collapsedSpanAtEnd(lineObj);
-	      var mergedPos = merged && merged.find(0, true);
-	      if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
-	        lineN = lineNo(lineObj = mergedPos.to.line);
-	      else
-	        return found;
-	    }
-	  }
-
-	  function coordsCharInner(cm, lineObj, lineNo, x, y) {
-	    var innerOff = y - heightAtLine(lineObj);
-	    var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
-	    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
-
-	    function getX(ch) {
-	      var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasure);
-	      wrongLine = true;
-	      if (innerOff > sp.bottom) return sp.left - adjust;
-	      else if (innerOff < sp.top) return sp.left + adjust;
-	      else wrongLine = false;
-	      return sp.left;
-	    }
-
-	    var bidi = getOrder(lineObj), dist = lineObj.text.length;
-	    var from = lineLeft(lineObj), to = lineRight(lineObj);
-	    var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
-
-	    if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
-	    // Do a binary search between these bounds.
-	    for (;;) {
-	      if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
-	        var ch = x < fromX || x - fromX <= toX - x ? from : to;
-	        var outside = ch == from ? fromOutside : toOutside
-	        var xDiff = x - (ch == from ? fromX : toX);
-	        // This is a kludge to handle the case where the coordinates
-	        // are after a line-wrapped line. We should replace it with a
-	        // more general handling of cursor positions around line
-	        // breaks. (Issue #4078)
-	        if (toOutside && !bidi && !/\s/.test(lineObj.text.charAt(ch)) && xDiff > 0 &&
-	            ch < lineObj.text.length && preparedMeasure.view.measure.heights.length > 1) {
-	          var charSize = measureCharPrepared(cm, preparedMeasure, ch, "right");
-	          if (innerOff <= charSize.bottom && innerOff >= charSize.top && Math.abs(x - charSize.right) < xDiff) {
-	            outside = false
-	            ch++
-	            xDiff = x - charSize.right
-	          }
-	        }
-	        while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
-	        var pos = PosWithInfo(lineNo, ch, outside, xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0);
-	        return pos;
-	      }
-	      var step = Math.ceil(dist / 2), middle = from + step;
-	      if (bidi) {
-	        middle = from;
-	        for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
-	      }
-	      var middleX = getX(middle);
-	      if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
-	      else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
-	    }
-	  }
-
-	  var measureText;
-	  // Compute the default text height.
-	  function textHeight(display) {
-	    if (display.cachedTextHeight != null) return display.cachedTextHeight;
-	    if (measureText == null) {
-	      measureText = elt("pre");
-	      // Measure a bunch of lines, for browsers that compute
-	      // fractional heights.
-	      for (var i = 0; i < 49; ++i) {
-	        measureText.appendChild(document.createTextNode("x"));
-	        measureText.appendChild(elt("br"));
-	      }
-	      measureText.appendChild(document.createTextNode("x"));
-	    }
-	    removeChildrenAndAdd(display.measure, measureText);
-	    var height = measureText.offsetHeight / 50;
-	    if (height > 3) display.cachedTextHeight = height;
-	    removeChildren(display.measure);
-	    return height || 1;
-	  }
-
-	  // Compute the default character width.
-	  function charWidth(display) {
-	    if (display.cachedCharWidth != null) return display.cachedCharWidth;
-	    var anchor = elt("span", "xxxxxxxxxx");
-	    var pre = elt("pre", [anchor]);
-	    removeChildrenAndAdd(display.measure, pre);
-	    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
-	    if (width > 2) display.cachedCharWidth = width;
-	    return width || 10;
-	  }
-
-	  // OPERATIONS
-
-	  // Operations are used to wrap a series of changes to the editor
-	  // state in such a way that each change won't have to update the
-	  // cursor and display (which would be awkward, slow, and
-	  // error-prone). Instead, display updates are batched and then all
-	  // combined and executed at once.
-
-	  var operationGroup = null;
-
-	  var nextOpId = 0;
-	  // Start a new operation.
-	  function startOperation(cm) {
-	    cm.curOp = {
-	      cm: cm,
-	      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
-	      startHeight: cm.doc.height, // Used to detect need to update scrollbar
-	      forceUpdate: false,      // Used to force a redraw
-	      updateInput: null,       // Whether to reset the input textarea
-	      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
-	      changeObjs: null,        // Accumulated changes, for firing change events
-	      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
-	      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
-	      selectionChanged: false, // Whether the selection needs to be redrawn
-	      updateMaxLine: false,    // Set when the widest line needs to be determined anew
-	      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
-	      scrollToPos: null,       // Used to scroll to a specific position
-	      focus: false,
-	      id: ++nextOpId           // Unique ID
-	    };
-	    if (operationGroup) {
-	      operationGroup.ops.push(cm.curOp);
-	    } else {
-	      cm.curOp.ownsGroup = operationGroup = {
-	        ops: [cm.curOp],
-	        delayedCallbacks: []
-	      };
-	    }
-	  }
-
-	  function fireCallbacksForOps(group) {
-	    // Calls delayed callbacks and cursorActivity handlers until no
-	    // new ones appear
-	    var callbacks = group.delayedCallbacks, i = 0;
-	    do {
-	      for (; i < callbacks.length; i++)
-	        callbacks[i].call(null);
-	      for (var j = 0; j < group.ops.length; j++) {
-	        var op = group.ops[j];
-	        if (op.cursorActivityHandlers)
-	          while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
-	            op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm);
-	      }
-	    } while (i < callbacks.length);
-	  }
-
-	  // Finish an operation, updating the display and signalling delayed events
-	  function endOperation(cm) {
-	    var op = cm.curOp, group = op.ownsGroup;
-	    if (!group) return;
-
-	    try { fireCallbacksForOps(group); }
-	    finally {
-	      operationGroup = null;
-	      for (var i = 0; i < group.ops.length; i++)
-	        group.ops[i].cm.curOp = null;
-	      endOperations(group);
-	    }
-	  }
-
-	  // The DOM updates done when an operation finishes are batched so
-	  // that the minimum number of relayouts are required.
-	  function endOperations(group) {
-	    var ops = group.ops;
-	    for (var i = 0; i < ops.length; i++) // Read DOM
-	      endOperation_R1(ops[i]);
-	    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
-	      endOperation_W1(ops[i]);
-	    for (var i = 0; i < ops.length; i++) // Read DOM
-	      endOperation_R2(ops[i]);
-	    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
-	      endOperation_W2(ops[i]);
-	    for (var i = 0; i < ops.length; i++) // Read DOM
-	      endOperation_finish(ops[i]);
-	  }
-
-	  function endOperation_R1(op) {
-	    var cm = op.cm, display = cm.display;
-	    maybeClipScrollbars(cm);
-	    if (op.updateMaxLine) findMaxLine(cm);
-
-	    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
-	      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
-	                         op.scrollToPos.to.line >= display.viewTo) ||
-	      display.maxLineChanged && cm.options.lineWrapping;
-	    op.update = op.mustUpdate &&
-	      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
-	  }
-
-	  function endOperation_W1(op) {
-	    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
-	  }
-
-	  function endOperation_R2(op) {
-	    var cm = op.cm, display = cm.display;
-	    if (op.updatedDisplay) updateHeightsInViewport(cm);
-
-	    op.barMeasure = measureForScrollbars(cm);
-
-	    // If the max line changed since it was last measured, measure it,
-	    // and ensure the document's width matches it.
-	    // updateDisplay_W2 will use these properties to do the actual resizing
-	    if (display.maxLineChanged && !cm.options.lineWrapping) {
-	      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
-	      cm.display.sizerWidth = op.adjustWidthTo;
-	      op.barMeasure.scrollWidth =
-	        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
-	      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
-	    }
-
-	    if (op.updatedDisplay || op.selectionChanged)
-	      op.preparedSelection = display.input.prepareSelection(op.focus);
-	  }
-
-	  function endOperation_W2(op) {
-	    var cm = op.cm;
-
-	    if (op.adjustWidthTo != null) {
-	      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
-	      if (op.maxScrollLeft < cm.doc.scrollLeft)
-	        setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true);
-	      cm.display.maxLineChanged = false;
-	    }
-
-	    var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
-	    if (op.preparedSelection)
-	      cm.display.input.showSelection(op.preparedSelection, takeFocus);
-	    if (op.updatedDisplay || op.startHeight != cm.doc.height)
-	      updateScrollbars(cm, op.barMeasure);
-	    if (op.updatedDisplay)
-	      setDocumentHeight(cm, op.barMeasure);
-
-	    if (op.selectionChanged) restartBlink(cm);
-
-	    if (cm.state.focused && op.updateInput)
-	      cm.display.input.reset(op.typing);
-	    if (takeFocus) ensureFocus(op.cm);
-	  }
-
-	  function endOperation_finish(op) {
-	    var cm = op.cm, display = cm.display, doc = cm.doc;
-
-	    if (op.updatedDisplay) postUpdateDisplay(cm, op.update);
-
-	    // Abort mouse wheel delta measurement, when scrolling explicitly
-	    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
-	      display.wheelStartX = display.wheelStartY = null;
-
-	    // Propagate the scroll position to the actual DOM scroller
-	    if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) {
-	      doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop));
-	      display.scrollbars.setScrollTop(doc.scrollTop);
-	      display.scroller.scrollTop = doc.scrollTop;
-	    }
-	    if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) {
-	      doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft));
-	      display.scrollbars.setScrollLeft(doc.scrollLeft);
-	      display.scroller.scrollLeft = doc.scrollLeft;
-	      alignHorizontally(cm);
-	    }
-	    // If we need to scroll a specific position into view, do so.
-	    if (op.scrollToPos) {
-	      var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
-	                                     clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
-	      if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords);
-	    }
-
-	    // Fire events for markers that are hidden/unidden by editing or
-	    // undoing
-	    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
-	    if (hidden) for (var i = 0; i < hidden.length; ++i)
-	      if (!hidden[i].lines.length) signal(hidden[i], "hide");
-	    if (unhidden) for (var i = 0; i < unhidden.length; ++i)
-	      if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
-
-	    if (display.wrapper.offsetHeight)
-	      doc.scrollTop = cm.display.scroller.scrollTop;
-
-	    // Fire change events, and delayed event handlers
-	    if (op.changeObjs)
-	      signal(cm, "changes", cm, op.changeObjs);
-	    if (op.update)
-	      op.update.finish();
-	  }
-
-	  // Run the given function in an operation
-	  function runInOp(cm, f) {
-	    if (cm.curOp) return f();
-	    startOperation(cm);
-	    try { return f(); }
-	    finally { endOperation(cm); }
-	  }
-	  // Wraps a function in an operation. Returns the wrapped function.
-	  function operation(cm, f) {
-	    return function() {
-	      if (cm.curOp) return f.apply(cm, arguments);
-	      startOperation(cm);
-	      try { return f.apply(cm, arguments); }
-	      finally { endOperation(cm); }
-	    };
-	  }
-	  // Used to add methods to editor and doc instances, wrapping them in
-	  // operations.
-	  function methodOp(f) {
-	    return function() {
-	      if (this.curOp) return f.apply(this, arguments);
-	      startOperation(this);
-	      try { return f.apply(this, arguments); }
-	      finally { endOperation(this); }
-	    };
-	  }
-	  function docMethodOp(f) {
-	    return function() {
-	      var cm = this.cm;
-	      if (!cm || cm.curOp) return f.apply(this, arguments);
-	      startOperation(cm);
-	      try { return f.apply(this, arguments); }
-	      finally { endOperation(cm); }
-	    };
-	  }
-
-	  // VIEW TRACKING
-
-	  // These objects are used to represent the visible (currently drawn)
-	  // part of the document. A LineView may correspond to multiple
-	  // logical lines, if those are connected by collapsed ranges.
-	  function LineView(doc, line, lineN) {
-	    // The starting line
-	    this.line = line;
-	    // Continuing lines, if any
-	    this.rest = visualLineContinued(line);
-	    // Number of logical lines in this visual line
-	    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
-	    this.node = this.text = null;
-	    this.hidden = lineIsHidden(doc, line);
-	  }
-
-	  // Create a range of LineView objects for the given lines.
-	  function buildViewArray(cm, from, to) {
-	    var array = [], nextPos;
-	    for (var pos = from; pos < to; pos = nextPos) {
-	      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
-	      nextPos = pos + view.size;
-	      array.push(view);
-	    }
-	    return array;
-	  }
-
-	  // Updates the display.view data structure for a given change to the
-	  // document. From and to are in pre-change coordinates. Lendiff is
-	  // the amount of lines added or subtracted by the change. This is
-	  // used for changes that span multiple lines, or change the way
-	  // lines are divided into visual lines. regLineChange (below)
-	  // registers single-line changes.
-	  function regChange(cm, from, to, lendiff) {
-	    if (from == null) from = cm.doc.first;
-	    if (to == null) to = cm.doc.first + cm.doc.size;
-	    if (!lendiff) lendiff = 0;
-
-	    var display = cm.display;
-	    if (lendiff && to < display.viewTo &&
-	        (display.updateLineNumbers == null || display.updateLineNumbers > from))
-	      display.updateLineNumbers = from;
-
-	    cm.curOp.viewChanged = true;
-
-	    if (from >= display.viewTo) { // Change after
-	      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
-	        resetView(cm);
-	    } else if (to <= display.viewFrom) { // Change before
-	      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
-	        resetView(cm);
-	      } else {
-	        display.viewFrom += lendiff;
-	        display.viewTo += lendiff;
-	      }
-	    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
-	      resetView(cm);
-	    } else if (from <= display.viewFrom) { // Top overlap
-	      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
-	      if (cut) {
-	        display.view = display.view.slice(cut.index);
-	        display.viewFrom = cut.lineN;
-	        display.viewTo += lendiff;
-	      } else {
-	        resetView(cm);
-	      }
-	    } else if (to >= display.viewTo) { // Bottom overlap
-	      var cut = viewCuttingPoint(cm, from, from, -1);
-	      if (cut) {
-	        display.view = display.view.slice(0, cut.index);
-	        display.viewTo = cut.lineN;
-	      } else {
-	        resetView(cm);
-	      }
-	    } else { // Gap in the middle
-	      var cutTop = viewCuttingPoint(cm, from, from, -1);
-	      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
-	      if (cutTop && cutBot) {
-	        display.view = display.view.slice(0, cutTop.index)
-	          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
-	          .concat(display.view.slice(cutBot.index));
-	        display.viewTo += lendiff;
-	      } else {
-	        resetView(cm);
-	      }
-	    }
-
-	    var ext = display.externalMeasured;
-	    if (ext) {
-	      if (to < ext.lineN)
-	        ext.lineN += lendiff;
-	      else if (from < ext.lineN + ext.size)
-	        display.externalMeasured = null;
-	    }
-	  }
-
-	  // Register a change to a single line. Type must be one of "text",
-	  // "gutter", "class", "widget"
-	  function regLineChange(cm, line, type) {
-	    cm.curOp.viewChanged = true;
-	    var display = cm.display, ext = cm.display.externalMeasured;
-	    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
-	      display.externalMeasured = null;
-
-	    if (line < display.viewFrom || line >= display.viewTo) return;
-	    var lineView = display.view[findViewIndex(cm, line)];
-	    if (lineView.node == null) return;
-	    var arr = lineView.changes || (lineView.changes = []);
-	    if (indexOf(arr, type) == -1) arr.push(type);
-	  }
-
-	  // Clear the view.
-	  function resetView(cm) {
-	    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
-	    cm.display.view = [];
-	    cm.display.viewOffset = 0;
-	  }
-
-	  // Find the view element corresponding to a given line. Return null
-	  // when the line isn't visible.
-	  function findViewIndex(cm, n) {
-	    if (n >= cm.display.viewTo) return null;
-	    n -= cm.display.viewFrom;
-	    if (n < 0) return null;
-	    var view = cm.display.view;
-	    for (var i = 0; i < view.length; i++) {
-	      n -= view[i].size;
-	      if (n < 0) return i;
-	    }
-	  }
-
-	  function viewCuttingPoint(cm, oldN, newN, dir) {
-	    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
-	    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
-	      return {index: index, lineN: newN};
-	    for (var i = 0, n = cm.display.viewFrom; i < index; i++)
-	      n += view[i].size;
-	    if (n != oldN) {
-	      if (dir > 0) {
-	        if (index == view.length - 1) return null;
-	        diff = (n + view[index].size) - oldN;
-	        index++;
-	      } else {
-	        diff = n - oldN;
-	      }
-	      oldN += diff; newN += diff;
-	    }
-	    while (visualLineNo(cm.doc, newN) != newN) {
-	      if (index == (dir < 0 ? 0 : view.length - 1)) return null;
-	      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
-	      index += dir;
-	    }
-	    return {index: index, lineN: newN};
-	  }
-
-	  // Force the view to cover a given range, adding empty view element
-	  // or clipping off existing ones as needed.
-	  function adjustView(cm, from, to) {
-	    var display = cm.display, view = display.view;
-	    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
-	      display.view = buildViewArray(cm, from, to);
-	      display.viewFrom = from;
-	    } else {
-	      if (display.viewFrom > from)
-	        display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view);
-	      else if (display.viewFrom < from)
-	        display.view = display.view.slice(findViewIndex(cm, from));
-	      display.viewFrom = from;
-	      if (display.viewTo < to)
-	        display.view = display.view.concat(buildViewArray(cm, display.viewTo, to));
-	      else if (display.viewTo > to)
-	        display.view = display.view.slice(0, findViewIndex(cm, to));
-	    }
-	    display.viewTo = to;
-	  }
-
-	  // Count the number of lines in the view whose DOM representation is
-	  // out of date (or nonexistent).
-	  function countDirtyView(cm) {
-	    var view = cm.display.view, dirty = 0;
-	    for (var i = 0; i < view.length; i++) {
-	      var lineView = view[i];
-	      if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty;
-	    }
-	    return dirty;
-	  }
-
-	  // EVENT HANDLERS
-
-	  // Attach the necessary event handlers when initializing the editor
-	  function registerEventHandlers(cm) {
-	    var d = cm.display;
-	    on(d.scroller, "mousedown", operation(cm, onMouseDown));
-	    // Older IE's will not fire a second mousedown for a double click
-	    if (ie && ie_version < 11)
-	      on(d.scroller, "dblclick", operation(cm, function(e) {
-	        if (signalDOMEvent(cm, e)) return;
-	        var pos = posFromMouse(cm, e);
-	        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
-	        e_preventDefault(e);
-	        var word = cm.findWordAt(pos);
-	        extendSelection(cm.doc, word.anchor, word.head);
-	      }));
-	    else
-	      on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
-	    // Some browsers fire contextmenu *after* opening the menu, at
-	    // which point we can't mess with it anymore. Context menu is
-	    // handled in onMouseDown for these browsers.
-	    if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
-
-	    // Used to suppress mouse event handling when a touch happens
-	    var touchFinished, prevTouch = {end: 0};
-	    function finishTouch() {
-	      if (d.activeTouch) {
-	        touchFinished = setTimeout(function() {d.activeTouch = null;}, 1000);
-	        prevTouch = d.activeTouch;
-	        prevTouch.end = +new Date;
-	      }
-	    };
-	    function isMouseLikeTouchEvent(e) {
-	      if (e.touches.length != 1) return false;
-	      var touch = e.touches[0];
-	      return touch.radiusX <= 1 && touch.radiusY <= 1;
-	    }
-	    function farAway(touch, other) {
-	      if (other.left == null) return true;
-	      var dx = other.left - touch.left, dy = other.top - touch.top;
-	      return dx * dx + dy * dy > 20 * 20;
-	    }
-	    on(d.scroller, "touchstart", function(e) {
-	      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
-	        clearTimeout(touchFinished);
-	        var now = +new Date;
-	        d.activeTouch = {start: now, moved: false,
-	                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
-	        if (e.touches.length == 1) {
-	          d.activeTouch.left = e.touches[0].pageX;
-	          d.activeTouch.top = e.touches[0].pageY;
-	        }
-	      }
-	    });
-	    on(d.scroller, "touchmove", function() {
-	      if (d.activeTouch) d.activeTouch.moved = true;
-	    });
-	    on(d.scroller, "touchend", function(e) {
-	      var touch = d.activeTouch;
-	      if (touch && !eventInWidget(d, e) && touch.left != null &&
-	          !touch.moved && new Date - touch.start < 300) {
-	        var pos = cm.coordsChar(d.activeTouch, "page"), range;
-	        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
-	          range = new Range(pos, pos);
-	        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
-	          range = cm.findWordAt(pos);
-	        else // Triple tap
-	          range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0)));
-	        cm.setSelection(range.anchor, range.head);
-	        cm.focus();
-	        e_preventDefault(e);
-	      }
-	      finishTouch();
-	    });
-	    on(d.scroller, "touchcancel", finishTouch);
-
-	    // Sync scrolling between fake scrollbars and real scrollable
-	    // area, ensure viewport is updated when scrolling.
-	    on(d.scroller, "scroll", function() {
-	      if (d.scroller.clientHeight) {
-	        setScrollTop(cm, d.scroller.scrollTop);
-	        setScrollLeft(cm, d.scroller.scrollLeft, true);
-	        signal(cm, "scroll", cm);
-	      }
-	    });
-
-	    // Listen to wheel events in order to try and update the viewport on time.
-	    on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
-	    on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
-
-	    // Prevent wrapper from ever scrolling
-	    on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
-
-	    d.dragFunctions = {
-	      enter: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);},
-	      over: function(e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
-	      start: function(e){onDragStart(cm, e);},
-	      drop: operation(cm, onDrop),
-	      leave: function(e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
-	    };
-
-	    var inp = d.input.getField();
-	    on(inp, "keyup", function(e) { onKeyUp.call(cm, e); });
-	    on(inp, "keydown", operation(cm, onKeyDown));
-	    on(inp, "keypress", operation(cm, onKeyPress));
-	    on(inp, "focus", bind(onFocus, cm));
-	    on(inp, "blur", bind(onBlur, cm));
-	  }
-
-	  function dragDropChanged(cm, value, old) {
-	    var wasOn = old && old != CodeMirror.Init;
-	    if (!value != !wasOn) {
-	      var funcs = cm.display.dragFunctions;
-	      var toggle = value ? on : off;
-	      toggle(cm.display.scroller, "dragstart", funcs.start);
-	      toggle(cm.display.scroller, "dragenter", funcs.enter);
-	      toggle(cm.display.scroller, "dragover", funcs.over);
-	      toggle(cm.display.scroller, "dragleave", funcs.leave);
-	      toggle(cm.display.scroller, "drop", funcs.drop);
-	    }
-	  }
-
-	  // Called when the window resizes
-	  function onResize(cm) {
-	    var d = cm.display;
-	    if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
-	      return;
-	    // Might be a text scaling operation, clear size caches.
-	    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-	    d.scrollbarsClipped = false;
-	    cm.setSize();
-	  }
-
-	  // MOUSE EVENTS
-
-	  // Return true when the given mouse event happened in a widget
-	  function eventInWidget(display, e) {
-	    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
-	      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
-	          (n.parentNode == display.sizer && n != display.mover))
-	        return true;
-	    }
-	  }
-
-	  // Given a mouse event, find the corresponding position. If liberal
-	  // is false, it checks whether a gutter or scrollbar was clicked,
-	  // and returns null if it was. forRect is used by rectangular
-	  // selections, and tries to estimate a character position even for
-	  // coordinates beyond the right of the text.
-	  function posFromMouse(cm, e, liberal, forRect) {
-	    var display = cm.display;
-	    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") return null;
-
-	    var x, y, space = display.lineSpace.getBoundingClientRect();
-	    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
-	    try { x = e.clientX - space.left; y = e.clientY - space.top; }
-	    catch (e) { return null; }
-	    var coords = coordsChar(cm, x, y), line;
-	    if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
-	      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
-	      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
-	    }
-	    return coords;
-	  }
-
-	  // A mouse down can be a single click, double click, triple click,
-	  // start of selection drag, start of text drag, new cursor
-	  // (ctrl-click), rectangle drag (alt-drag), or xwin
-	  // middle-click-paste. Or it might be a click on something we should
-	  // not interfere with, such as a scrollbar or widget.
-	  function onMouseDown(e) {
-	    var cm = this, display = cm.display;
-	    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return;
-	    display.shift = e.shiftKey;
-
-	    if (eventInWidget(display, e)) {
-	      if (!webkit) {
-	        // Briefly turn off draggability, to allow widgets to do
-	        // normal dragging things.
-	        display.scroller.draggable = false;
-	        setTimeout(function(){display.scroller.draggable = true;}, 100);
-	      }
-	      return;
-	    }
-	    if (clickInGutter(cm, e)) return;
-	    var start = posFromMouse(cm, e);
-	    window.focus();
-
-	    switch (e_button(e)) {
-	    case 1:
-	      // #3261: make sure, that we're not starting a second selection
-	      if (cm.state.selectingText)
-	        cm.state.selectingText(e);
-	      else if (start)
-	        leftButtonDown(cm, e, start);
-	      else if (e_target(e) == display.scroller)
-	        e_preventDefault(e);
-	      break;
-	    case 2:
-	      if (webkit) cm.state.lastMiddleDown = +new Date;
-	      if (start) extendSelection(cm.doc, start);
-	      setTimeout(function() {display.input.focus();}, 20);
-	      e_preventDefault(e);
-	      break;
-	    case 3:
-	      if (captureRightClick) onContextMenu(cm, e);
-	      else delayBlurEvent(cm);
-	      break;
-	    }
-	  }
-
-	  var lastClick, lastDoubleClick;
-	  function leftButtonDown(cm, e, start) {
-	    if (ie) setTimeout(bind(ensureFocus, cm), 0);
-	    else cm.curOp.focus = activeElt();
-
-	    var now = +new Date, type;
-	    if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) {
-	      type = "triple";
-	    } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) {
-	      type = "double";
-	      lastDoubleClick = {time: now, pos: start};
-	    } else {
-	      type = "single";
-	      lastClick = {time: now, pos: start};
-	    }
-
-	    var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained;
-	    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
-	        type == "single" && (contained = sel.contains(start)) > -1 &&
-	        (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) &&
-	        (cmp(contained.to(), start) > 0 || start.xRel < 0))
-	      leftButtonStartDrag(cm, e, start, modifier);
+	      if (line.text.length <= cm.options.maxHighlightLength)
+	        { processLine(cm, line.text, context) }
+	      line.stateAfter = context.line % 5 == 0 ? context.save() : null
+	      context.nextLine()
+	    }
+	    if (+new Date > end) {
+	      startWorker(cm, cm.options.workDelay)
+	      return true
+	    }
+	  })
+	  doc.highlightFrontier = context.line
+	  doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
+	  if (changedLines.length) { runInOp(cm, function () {
+	    for (var i = 0; i < changedLines.length; i++)
+	      { regLineChange(cm, changedLines[i], "text") }
+	  }) }
+	}
+
+	// DISPLAY DRAWING
+
+	var DisplayUpdate = function(cm, viewport, force) {
+	  var display = cm.display
+
+	  this.viewport = viewport
+	  // Store some values that we'll need later (but don't want to force a relayout for)
+	  this.visible = visibleLines(display, cm.doc, viewport)
+	  this.editorIsHidden = !display.wrapper.offsetWidth
+	  this.wrapperHeight = display.wrapper.clientHeight
+	  this.wrapperWidth = display.wrapper.clientWidth
+	  this.oldDisplayWidth = displayWidth(cm)
+	  this.force = force
+	  this.dims = getDimensions(cm)
+	  this.events = []
+	};
+
+	DisplayUpdate.prototype.signal = function (emitter, type) {
+	  if (hasHandler(emitter, type))
+	    { this.events.push(arguments) }
+	};
+	DisplayUpdate.prototype.finish = function () {
+	    var this$1 = this;
+
+	  for (var i = 0; i < this.events.length; i++)
+	    { signal.apply(null, this$1.events[i]) }
+	};
+
+	function maybeClipScrollbars(cm) {
+	  var display = cm.display
+	  if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+	    display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth
+	    display.heightForcer.style.height = scrollGap(cm) + "px"
+	    display.sizer.style.marginBottom = -display.nativeBarWidth + "px"
+	    display.sizer.style.borderRightWidth = scrollGap(cm) + "px"
+	    display.scrollbarsClipped = true
+	  }
+	}
+
+	function selectionSnapshot(cm) {
+	  if (cm.hasFocus()) { return null }
+	  var active = activeElt()
+	  if (!active || !contains(cm.display.lineDiv, active)) { return null }
+	  var result = {activeElt: active}
+	  if (window.getSelection) {
+	    var sel = window.getSelection()
+	    if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+	      result.anchorNode = sel.anchorNode
+	      result.anchorOffset = sel.anchorOffset
+	      result.focusNode = sel.focusNode
+	      result.focusOffset = sel.focusOffset
+	    }
+	  }
+	  return result
+	}
+
+	function restoreSelection(snapshot) {
+	  if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+	  snapshot.activeElt.focus()
+	  if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+	    var sel = window.getSelection(), range = document.createRange()
+	    range.setEnd(snapshot.anchorNode, snapshot.anchorOffset)
+	    range.collapse(false)
+	    sel.removeAllRanges()
+	    sel.addRange(range)
+	    sel.extend(snapshot.focusNode, snapshot.focusOffset)
+	  }
+	}
+
+	// Does the actual updating of the line display. Bails out
+	// (returning false) when there is nothing to be done and forced is
+	// false.
+	function updateDisplayIfNeeded(cm, update) {
+	  var display = cm.display, doc = cm.doc
+
+	  if (update.editorIsHidden) {
+	    resetView(cm)
+	    return false
+	  }
+
+	  // Bail out if the visible area is already rendered and nothing changed.
+	  if (!update.force &&
+	      update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+	      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+	      display.renderedView == display.view && countDirtyView(cm) == 0)
+	    { return false }
+
+	  if (maybeUpdateLineNumberWidth(cm)) {
+	    resetView(cm)
+	    update.dims = getDimensions(cm)
+	  }
+
+	  // Compute a suitable new viewport (from & to)
+	  var end = doc.first + doc.size
+	  var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first)
+	  var to = Math.min(end, update.visible.to + cm.options.viewportMargin)
+	  if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom) }
+	  if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo) }
+	  if (sawCollapsedSpans) {
+	    from = visualLineNo(cm.doc, from)
+	    to = visualLineEndNo(cm.doc, to)
+	  }
+
+	  var different = from != display.viewFrom || to != display.viewTo ||
+	    display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth
+	  adjustView(cm, from, to)
+
+	  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom))
+	  // Position the mover div to align with the current scroll position
+	  cm.display.mover.style.top = display.viewOffset + "px"
+
+	  var toUpdate = countDirtyView(cm)
+	  if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+	      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+	    { return false }
+
+	  // For big changes, we hide the enclosing element during the
+	  // update, since that speeds up the operations on most browsers.
+	  var selSnapshot = selectionSnapshot(cm)
+	  if (toUpdate > 4) { display.lineDiv.style.display = "none" }
+	  patchDisplay(cm, display.updateLineNumbers, update.dims)
+	  if (toUpdate > 4) { display.lineDiv.style.display = "" }
+	  display.renderedView = display.view
+	  // There might have been a widget with a focused element that got
+	  // hidden or updated, if so re-focus it.
+	  restoreSelection(selSnapshot)
+
+	  // Prevent selection and cursors from interfering with the scroll
+	  // width and height.
+	  removeChildren(display.cursorDiv)
+	  removeChildren(display.selectionDiv)
+	  display.gutters.style.height = display.sizer.style.minHeight = 0
+
+	  if (different) {
+	    display.lastWrapHeight = update.wrapperHeight
+	    display.lastWrapWidth = update.wrapperWidth
+	    startWorker(cm, 400)
+	  }
+
+	  display.updateLineNumbers = null
+
+	  return true
+	}
+
+	function postUpdateDisplay(cm, update) {
+	  var viewport = update.viewport
+
+	  for (var first = true;; first = false) {
+	    if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+	      // Clip forced viewport to actual scrollable area.
+	      if (viewport && viewport.top != null)
+	        { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)} }
+	      // Updated line heights might result in the drawn area not
+	      // actually covering the viewport. Keep looping until it does.
+	      update.visible = visibleLines(cm.display, cm.doc, viewport)
+	      if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+	        { break }
+	    }
+	    if (!updateDisplayIfNeeded(cm, update)) { break }
+	    updateHeightsInViewport(cm)
+	    var barMeasure = measureForScrollbars(cm)
+	    updateSelection(cm)
+	    updateScrollbars(cm, barMeasure)
+	    setDocumentHeight(cm, barMeasure)
+	    update.force = false
+	  }
+
+	  update.signal(cm, "update", cm)
+	  if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+	    update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo)
+	    cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo
+	  }
+	}
+
+	function updateDisplaySimple(cm, viewport) {
+	  var update = new DisplayUpdate(cm, viewport)
+	  if (updateDisplayIfNeeded(cm, update)) {
+	    updateHeightsInViewport(cm)
+	    postUpdateDisplay(cm, update)
+	    var barMeasure = measureForScrollbars(cm)
+	    updateSelection(cm)
+	    updateScrollbars(cm, barMeasure)
+	    setDocumentHeight(cm, barMeasure)
+	    update.finish()
+	  }
+	}
+
+	// Sync the actual display DOM structure with display.view, removing
+	// nodes for lines that are no longer in view, and creating the ones
+	// that are not there yet, and updating the ones that are out of
+	// date.
+	function patchDisplay(cm, updateNumbersFrom, dims) {
+	  var display = cm.display, lineNumbers = cm.options.lineNumbers
+	  var container = display.lineDiv, cur = container.firstChild
+
+	  function rm(node) {
+	    var next = node.nextSibling
+	    // Works around a throw-scroll bug in OS X Webkit
+	    if (webkit && mac && cm.display.currentWheelTarget == node)
+	      { node.style.display = "none" }
 	    else
-	      leftButtonSelect(cm, e, start, type, modifier);
-	  }
-
-	  // Start a text drag. When it ends, see if any dragging actually
-	  // happen, and treat as a click if it didn't.
-	  function leftButtonStartDrag(cm, e, start, modifier) {
-	    var display = cm.display, startTime = +new Date;
-	    var dragEnd = operation(cm, function(e2) {
-	      if (webkit) display.scroller.draggable = false;
-	      cm.state.draggingText = false;
-	      off(document, "mouseup", dragEnd);
-	      off(display.scroller, "drop", dragEnd);
-	      if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
-	        e_preventDefault(e2);
-	        if (!modifier && +new Date - 200 < startTime)
-	          extendSelection(cm.doc, start);
-	        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
-	        if (webkit || ie && ie_version == 9)
-	          setTimeout(function() {document.body.focus(); display.input.focus();}, 20);
-	        else
-	          display.input.focus();
-	      }
-	    });
-	    // Let the drag handler handle this.
-	    if (webkit) display.scroller.draggable = true;
-	    cm.state.draggingText = dragEnd;
-	    dragEnd.copy = mac ? e.altKey : e.ctrlKey
-	    // IE's approach to draggable
-	    if (display.scroller.dragDrop) display.scroller.dragDrop();
-	    on(document, "mouseup", dragEnd);
-	    on(display.scroller, "drop", dragEnd);
-	  }
-
-	  // Normal selection, as opposed to text dragging.
-	  function leftButtonSelect(cm, e, start, type, addNew) {
-	    var display = cm.display, doc = cm.doc;
-	    e_preventDefault(e);
-
-	    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
-	    if (addNew && !e.shiftKey) {
-	      ourIndex = doc.sel.contains(start);
-	      if (ourIndex > -1)
-	        ourRange = ranges[ourIndex];
-	      else
-	        ourRange = new Range(start, start);
+	      { node.parentNode.removeChild(node) }
+	    return next
+	  }
+
+	  var view = display.view, lineN = display.viewFrom
+	  // Loop over the elements in the view, syncing cur (the DOM nodes
+	  // in display.lineDiv) with the view as we go.
+	  for (var i = 0; i < view.length; i++) {
+	    var lineView = view[i]
+	    if (lineView.hidden) {
+	    } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+	      var node = buildLineElement(cm, lineView, lineN, dims)
+	      container.insertBefore(node, cur)
+	    } else { // Already drawn
+	      while (cur != lineView.node) { cur = rm(cur) }
+	      var updateNumber = lineNumbers && updateNumbersFrom != null &&
+	        updateNumbersFrom <= lineN && lineView.lineNumber
+	      if (lineView.changes) {
+	        if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false }
+	        updateLineForChanges(cm, lineView, lineN, dims)
+	      }
+	      if (updateNumber) {
+	        removeChildren(lineView.lineNumber)
+	        lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)))
+	      }
+	      cur = lineView.node.nextSibling
+	    }
+	    lineN += lineView.size
+	  }
+	  while (cur) { cur = rm(cur) }
+	}
+
+	function updateGutterSpace(cm) {
+	  var width = cm.display.gutters.offsetWidth
+	  cm.display.sizer.style.marginLeft = width + "px"
+	}
+
+	function setDocumentHeight(cm, measure) {
+	  cm.display.sizer.style.minHeight = measure.docHeight + "px"
+	  cm.display.heightForcer.style.top = measure.docHeight + "px"
+	  cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"
+	}
+
+	// Rebuild the gutter elements, ensure the margin to the left of the
+	// code matches their width.
+	function updateGutters(cm) {
+	  var gutters = cm.display.gutters, specs = cm.options.gutters
+	  removeChildren(gutters)
+	  var i = 0
+	  for (; i < specs.length; ++i) {
+	    var gutterClass = specs[i]
+	    var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass))
+	    if (gutterClass == "CodeMirror-linenumbers") {
+	      cm.display.lineGutter = gElt
+	      gElt.style.width = (cm.display.lineNumWidth || 1) + "px"
+	    }
+	  }
+	  gutters.style.display = i ? "" : "none"
+	  updateGutterSpace(cm)
+	}
+
+	// Make sure the gutters options contains the element
+	// "CodeMirror-linenumbers" when the lineNumbers option is true.
+	function setGuttersForLineNumbers(options) {
+	  var found = indexOf(options.gutters, "CodeMirror-linenumbers")
+	  if (found == -1 && options.lineNumbers) {
+	    options.gutters = options.gutters.concat(["CodeMirror-linenumbers"])
+	  } else if (found > -1 && !options.lineNumbers) {
+	    options.gutters = options.gutters.slice(0)
+	    options.gutters.splice(found, 1)
+	  }
+	}
+
+	var wheelSamples = 0;
+	var wheelPixelsPerUnit = null;
+	// Fill in a browser-detected starting value on browsers where we
+	// know one. These don't have to be accurate -- the result of them
+	// being wrong would just be a slight flicker on the first wheel
+	// scroll (if it is large enough).
+	if (ie) { wheelPixelsPerUnit = -.53 }
+	else if (gecko) { wheelPixelsPerUnit = 15 }
+	else if (chrome) { wheelPixelsPerUnit = -.7 }
+	else if (safari) { wheelPixelsPerUnit = -1/3 }
+
+	function wheelEventDelta(e) {
+	  var dx = e.wheelDeltaX, dy = e.wheelDeltaY
+	  if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail }
+	  if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail }
+	  else if (dy == null) { dy = e.wheelDelta }
+	  return {x: dx, y: dy}
+	}
+	function wheelEventPixels(e) {
+	  var delta = wheelEventDelta(e)
+	  delta.x *= wheelPixelsPerUnit
+	  delta.y *= wheelPixelsPerUnit
+	  return delta
+	}
+
+	function onScrollWheel(cm, e) {
+	  var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y
+
+	  var display = cm.display, scroll = display.scroller
+	  // Quit if there's nothing to scroll here
+	  var canScrollX = scroll.scrollWidth > scroll.clientWidth
+	  var canScrollY = scroll.scrollHeight > scroll.clientHeight
+	  if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+	  // Webkit browsers on OS X abort momentum scrolls when the target
+	  // of the scroll event is removed from the scrollable element.
+	  // This hack (see related code in patchDisplay) makes sure the
+	  // element is kept around.
+	  if (dy && mac && webkit) {
+	    outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+	      for (var i = 0; i < view.length; i++) {
+	        if (view[i].node == cur) {
+	          cm.display.currentWheelTarget = cur
+	          break outer
+	        }
+	      }
+	    }
+	  }
+
+	  // On some browsers, horizontal scrolling will cause redraws to
+	  // happen before the gutter has been realigned, causing it to
+	  // wriggle around in a most unseemly way. When we have an
+	  // estimated pixels/delta value, we just handle horizontal
+	  // scrolling entirely here. It'll be slightly off from native, but
+	  // better than glitching out.
+	  if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+	    if (dy && canScrollY)
+	      { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)) }
+	    setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit))
+	    // Only prevent default scrolling if vertical scrolling is
+	    // actually possible. Otherwise, it causes vertical scroll
+	    // jitter on OSX trackpads when deltaX is small and deltaY
+	    // is large (issue #3579)
+	    if (!dy || (dy && canScrollY))
+	      { e_preventDefault(e) }
+	    display.wheelStartX = null // Abort measurement, if in progress
+	    return
+	  }
+
+	  // 'Project' the visible viewport to cover the area that is being
+	  // scrolled into view (if we know enough to estimate it).
+	  if (dy && wheelPixelsPerUnit != null) {
+	    var pixels = dy * wheelPixelsPerUnit
+	    var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight
+	    if (pixels < 0) { top = Math.max(0, top + pixels - 50) }
+	    else { bot = Math.min(cm.doc.height, bot + pixels + 50) }
+	    updateDisplaySimple(cm, {top: top, bottom: bot})
+	  }
+
+	  if (wheelSamples < 20) {
+	    if (display.wheelStartX == null) {
+	      display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop
+	      display.wheelDX = dx; display.wheelDY = dy
+	      setTimeout(function () {
+	        if (display.wheelStartX == null) { return }
+	        var movedX = scroll.scrollLeft - display.wheelStartX
+	        var movedY = scroll.scrollTop - display.wheelStartY
+	        var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+	          (movedX && display.wheelDX && movedX / display.wheelDX)
+	        display.wheelStartX = display.wheelStartY = null
+	        if (!sample) { return }
+	        wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1)
+	        ++wheelSamples
+	      }, 200)
 	    } else {
-	      ourRange = doc.sel.primary();
-	      ourIndex = doc.sel.primIndex;
-	    }
-
-	    if (chromeOS ? e.shiftKey && e.metaKey : e.altKey) {
-	      type = "rect";
-	      if (!addNew) ourRange = new Range(start, start);
-	      start = posFromMouse(cm, e, true, true);
-	      ourIndex = -1;
-	    } else if (type == "double") {
-	      var word = cm.findWordAt(start);
-	      if (cm.display.shift || doc.extend)
-	        ourRange = extendRange(doc, ourRange, word.anchor, word.head);
-	      else
-	        ourRange = word;
-	    } else if (type == "triple") {
-	      var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)));
-	      if (cm.display.shift || doc.extend)
-	        ourRange = extendRange(doc, ourRange, line.anchor, line.head);
-	      else
-	        ourRange = line;
+	      display.wheelDX += dx; display.wheelDY += dy
+	    }
+	  }
+	}
+
+	// Selection objects are immutable. A new one is created every time
+	// the selection changes. A selection is one or more non-overlapping
+	// (and non-touching) ranges, sorted, and an integer that indicates
+	// which one is the primary selection (the one that's scrolled into
+	// view, that getCursor returns, etc).
+	var Selection = function(ranges, primIndex) {
+	  this.ranges = ranges
+	  this.primIndex = primIndex
+	};
+
+	Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+	Selection.prototype.equals = function (other) {
+	    var this$1 = this;
+
+	  if (other == this) { return true }
+	  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+	  for (var i = 0; i < this.ranges.length; i++) {
+	    var here = this$1.ranges[i], there = other.ranges[i]
+	    if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+	  }
+	  return true
+	};
+
+	Selection.prototype.deepCopy = function () {
+	    var this$1 = this;
+
+	  var out = []
+	  for (var i = 0; i < this.ranges.length; i++)
+	    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)) }
+	  return new Selection(out, this.primIndex)
+	};
+
+	Selection.prototype.somethingSelected = function () {
+	    var this$1 = this;
+
+	  for (var i = 0; i < this.ranges.length; i++)
+	    { if (!this$1.ranges[i].empty()) { return true } }
+	  return false
+	};
+
+	Selection.prototype.contains = function (pos, end) {
+	    var this$1 = this;
+
+	  if (!end) { end = pos }
+	  for (var i = 0; i < this.ranges.length; i++) {
+	    var range = this$1.ranges[i]
+	    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+	      { return i }
+	  }
+	  return -1
+	};
+
+	var Range = function(anchor, head) {
+	  this.anchor = anchor; this.head = head
+	};
+
+	Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+	Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+	Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+	// Take an unsorted, potentially overlapping set of ranges, and
+	// build a selection out of it. 'Consumes' ranges array (modifying
+	// it).
+	function normalizeSelection(ranges, primIndex) {
+	  var prim = ranges[primIndex]
+	  ranges.sort(function (a, b) { return cmp(a.from(), b.from()); })
+	  primIndex = indexOf(ranges, prim)
+	  for (var i = 1; i < ranges.length; i++) {
+	    var cur = ranges[i], prev = ranges[i - 1]
+	    if (cmp(prev.to(), cur.from()) >= 0) {
+	      var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to())
+	      var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head
+	      if (i <= primIndex) { --primIndex }
+	      ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to))
+	    }
+	  }
+	  return new Selection(ranges, primIndex)
+	}
+
+	function simpleSelection(anchor, head) {
+	  return new Selection([new Range(anchor, head || anchor)], 0)
+	}
+
+	// Compute the position of the end of a change (its 'to' property
+	// refers to the pre-change end).
+	function changeEnd(change) {
+	  if (!change.text) { return change.to }
+	  return Pos(change.from.line + change.text.length - 1,
+	             lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+	}
+
+	// Adjust a position to refer to the post-change position of the
+	// same text, or the end of the change if the change covers it.
+	function adjustForChange(pos, change) {
+	  if (cmp(pos, change.from) < 0) { return pos }
+	  if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+	  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch
+	  if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch }
+	  return Pos(line, ch)
+	}
+
+	function computeSelAfterChange(doc, change) {
+	  var out = []
+	  for (var i = 0; i < doc.sel.ranges.length; i++) {
+	    var range = doc.sel.ranges[i]
+	    out.push(new Range(adjustForChange(range.anchor, change),
+	                       adjustForChange(range.head, change)))
+	  }
+	  return normalizeSelection(out, doc.sel.primIndex)
+	}
+
+	function offsetPos(pos, old, nw) {
+	  if (pos.line == old.line)
+	    { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+	  else
+	    { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+	}
+
+	// Used by replaceSelections to allow moving the selection to the
+	// start or around the replaced test. Hint may be "start" or "around".
+	function computeReplacedSel(doc, changes, hint) {
+	  var out = []
+	  var oldPrev = Pos(doc.first, 0), newPrev = oldPrev
+	  for (var i = 0; i < changes.length; i++) {
+	    var change = changes[i]
+	    var from = offsetPos(change.from, oldPrev, newPrev)
+	    var to = offsetPos(changeEnd(change), oldPrev, newPrev)
+	    oldPrev = change.to
+	    newPrev = to
+	    if (hint == "around") {
+	      var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0
+	      out[i] = new Range(inv ? to : from, inv ? from : to)
 	    } else {
-	      ourRange = extendRange(doc, ourRange, start);
-	    }
-
-	    if (!addNew) {
-	      ourIndex = 0;
-	      setSelection(doc, new Selection([ourRange], 0), sel_mouse);
-	      startSel = doc.sel;
-	    } else if (ourIndex == -1) {
-	      ourIndex = ranges.length;
-	      setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
-	                   {scroll: false, origin: "*mouse"});
-	    } else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) {
-	      setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
-	                   {scroll: false, origin: "*mouse"});
-	      startSel = doc.sel;
+	      out[i] = new Range(from, from)
+	    }
+	  }
+	  return new Selection(out, doc.sel.primIndex)
+	}
+
+	// Used to get the editor into a consistent state again when options change.
+
+	function loadMode(cm) {
+	  cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
+	  resetModeState(cm)
+	}
+
+	function resetModeState(cm) {
+	  cm.doc.iter(function (line) {
+	    if (line.stateAfter) { line.stateAfter = null }
+	    if (line.styles) { line.styles = null }
+	  })
+	  cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first
+	  startWorker(cm, 100)
+	  cm.state.modeGen++
+	  if (cm.curOp) { regChange(cm) }
+	}
+
+	// DOCUMENT DATA STRUCTURE
+
+	// By default, updates that start and end at the beginning of a line
+	// are treated specially, in order to make the association of line
+	// widgets and marker elements with the text behave more intuitive.
+	function isWholeLineUpdate(doc, change) {
+	  return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+	    (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+	}
+
+	// Perform a change on the document data structure.
+	function updateDoc(doc, change, markedSpans, estimateHeight) {
+	  function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+	  function update(line, text, spans) {
+	    updateLine(line, text, spans, estimateHeight)
+	    signalLater(line, "change", line, change)
+	  }
+	  function linesFor(start, end) {
+	    var result = []
+	    for (var i = start; i < end; ++i)
+	      { result.push(new Line(text[i], spansFor(i), estimateHeight)) }
+	    return result
+	  }
+
+	  var from = change.from, to = change.to, text = change.text
+	  var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
+	  var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line
+
+	  // Adjust the line structure
+	  if (change.full) {
+	    doc.insert(0, linesFor(0, text.length))
+	    doc.remove(text.length, doc.size - text.length)
+	  } else if (isWholeLineUpdate(doc, change)) {
+	    // This is a whole-line replace. Treated specially to make
+	    // sure line objects move the way they are supposed to.
+	    var added = linesFor(0, text.length - 1)
+	    update(lastLine, lastLine.text, lastSpans)
+	    if (nlines) { doc.remove(from.line, nlines) }
+	    if (added.length) { doc.insert(from.line, added) }
+	  } else if (firstLine == lastLine) {
+	    if (text.length == 1) {
+	      update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
+	    } else {
+	      var added$1 = linesFor(1, text.length - 1)
+	      added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight))
+	      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+	      doc.insert(from.line + 1, added$1)
+	    }
+	  } else if (text.length == 1) {
+	    update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
+	    doc.remove(from.line + 1, nlines)
+	  } else {
+	    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+	    update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
+	    var added$2 = linesFor(1, text.length - 1)
+	    if (nlines > 1) { doc.remove(from.line + 1, nlines - 1) }
+	    doc.insert(from.line + 1, added$2)
+	  }
+
+	  signalLater(doc, "change", doc, change)
+	}
+
+	// Call f for all linked documents.
+	function linkedDocs(doc, f, sharedHistOnly) {
+	  function propagate(doc, skip, sharedHist) {
+	    if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+	      var rel = doc.linked[i]
+	      if (rel.doc == skip) { continue }
+	      var shared = sharedHist && rel.sharedHist
+	      if (sharedHistOnly && !shared) { continue }
+	      f(rel.doc, shared)
+	      propagate(rel.doc, doc, shared)
+	    } }
+	  }
+	  propagate(doc, null, true)
+	}
+
+	// Attach a document to an editor.
+	function attachDoc(cm, doc) {
+	  if (doc.cm) { throw new Error("This document is already in use.") }
+	  cm.doc = doc
+	  doc.cm = cm
+	  estimateLineHeights(cm)
+	  loadMode(cm)
+	  setDirectionClass(cm)
+	  if (!cm.options.lineWrapping) { findMaxLine(cm) }
+	  cm.options.mode = doc.modeOption
+	  regChange(cm)
+	}
+
+	function setDirectionClass(cm) {
+	  ;(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl")
+	}
+
+	function directionChanged(cm) {
+	  runInOp(cm, function () {
+	    setDirectionClass(cm)
+	    regChange(cm)
+	  })
+	}
+
+	function History(startGen) {
+	  // Arrays of change events and selections. Doing something adds an
+	  // event to done and clears undo. Undoing moves events from done
+	  // to undone, redoing moves them in the other direction.
+	  this.done = []; this.undone = []
+	  this.undoDepth = Infinity
+	  // Used to track when changes can be merged into a single undo
+	  // event
+	  this.lastModTime = this.lastSelTime = 0
+	  this.lastOp = this.lastSelOp = null
+	  this.lastOrigin = this.lastSelOrigin = null
+	  // Used by the isClean() method
+	  this.generation = this.maxGeneration = startGen || 1
+	}
+
+	// Create a history change event from an updateDoc-style change
+	// object.
+	function historyChangeFromChange(doc, change) {
+	  var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}
+	  attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1)
+	  linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true)
+	  return histChange
+	}
+
+	// Pop all selection events off the end of a history array. Stop at
+	// a change event.
+	function clearSelectionEvents(array) {
+	  while (array.length) {
+	    var last = lst(array)
+	    if (last.ranges) { array.pop() }
+	    else { break }
+	  }
+	}
+
+	// Find the top change event in the history. Pop off selection
+	// events that are in the way.
+	function lastChangeEvent(hist, force) {
+	  if (force) {
+	    clearSelectionEvents(hist.done)
+	    return lst(hist.done)
+	  } else if (hist.done.length && !lst(hist.done).ranges) {
+	    return lst(hist.done)
+	  } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+	    hist.done.pop()
+	    return lst(hist.done)
+	  }
+	}
+
+	// Register a change in the history. Merges changes that are within
+	// a single operation, or are close together with an origin that
+	// allows merging (starting with "+") into a single event.
+	function addChangeToHistory(doc, change, selAfter, opId) {
+	  var hist = doc.history
+	  hist.undone.length = 0
+	  var time = +new Date, cur
+	  var last
+
+	  if ((hist.lastOp == opId ||
+	       hist.lastOrigin == change.origin && change.origin &&
+	       ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
+	        change.origin.charAt(0) == "*")) &&
+	      (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+	    // Merge this change into the last event
+	    last = lst(cur.changes)
+	    if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+	      // Optimized case for simple insertion -- don't want to add
+	      // new changesets for every character typed
+	      last.to = changeEnd(change)
 	    } else {
-	      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
-	    }
-
-	    var lastPos = start;
-	    function extendTo(pos) {
-	      if (cmp(lastPos, pos) == 0) return;
-	      lastPos = pos;
-
-	      if (type == "rect") {
-	        var ranges = [], tabSize = cm.options.tabSize;
-	        var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
-	        var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
-	        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
-	        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
-	             line <= end; line++) {
-	          var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
-	          if (left == right)
-	            ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)));
-	          else if (text.length > leftPos)
-	            ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))));
-	        }
-	        if (!ranges.length) ranges.push(new Range(start, start));
-	        setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
-	                     {origin: "*mouse", scroll: false});
-	        cm.scrollIntoView(pos);
-	      } else {
-	        var oldRange = ourRange;
-	        var anchor = oldRange.anchor, head = pos;
-	        if (type != "single") {
-	          if (type == "double")
-	            var range = cm.findWordAt(pos);
-	          else
-	            var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0)));
-	          if (cmp(range.anchor, anchor) > 0) {
-	            head = range.head;
-	            anchor = minPos(oldRange.from(), range.anchor);
-	          } else {
-	            head = range.anchor;
-	            anchor = maxPos(oldRange.to(), range.head);
-	          }
-	        }
-	        var ranges = startSel.ranges.slice(0);
-	        ranges[ourIndex] = new Range(clipPos(doc, anchor), head);
-	        setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse);
-	      }
-	    }
-
-	    var editorSize = display.wrapper.getBoundingClientRect();
-	    // Used to ensure timeout re-tries don't fire when another extend
-	    // happened in the meantime (clearTimeout isn't reliable -- at
-	    // least on Chrome, the timeouts still happen even when cleared,
-	    // if the clear happens after their scheduled firing time).
-	    var counter = 0;
-
-	    function extend(e) {
-	      var curCount = ++counter;
-	      var cur = posFromMouse(cm, e, true, type == "rect");
-	      if (!cur) return;
-	      if (cmp(cur, lastPos) != 0) {
-	        cm.curOp.focus = activeElt();
-	        extendTo(cur);
-	        var visible = visibleLines(display, doc);
-	        if (cur.line >= visible.to || cur.line < visible.from)
-	          setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
-	      } else {
-	        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
-	        if (outside) setTimeout(operation(cm, function() {
-	          if (counter != curCount) return;
-	          display.scroller.scrollTop += outside;
-	          extend(e);
-	        }), 50);
-	      }
-	    }
-
-	    function done(e) {
-	      cm.state.selectingText = false;
-	      counter = Infinity;
-	      e_preventDefault(e);
-	      display.input.focus();
-	      off(document, "mousemove", move);
-	      off(document, "mouseup", up);
-	      doc.history.lastSelOrigin = null;
-	    }
-
-	    var move = operation(cm, function(e) {
-	      if (!e_button(e)) done(e);
-	      else extend(e);
-	    });
-	    var up = operation(cm, done);
-	    cm.state.selectingText = up;
-	    on(document, "mousemove", move);
-	    on(document, "mouseup", up);
-	  }
-
-	  // Determines whether an event happened in the gutter, and fires the
-	  // handlers for the corresponding event.
-	  function gutterEvent(cm, e, type, prevent) {
-	    try { var mX = e.clientX, mY = e.clientY; }
-	    catch(e) { return false; }
-	    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;
-	    if (prevent) e_preventDefault(e);
-
-	    var display = cm.display;
-	    var lineBox = display.lineDiv.getBoundingClientRect();
-
-	    if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);
-	    mY -= lineBox.top - display.viewOffset;
-
-	    for (var i = 0; i < cm.options.gutters.length; ++i) {
-	      var g = display.gutters.childNodes[i];
-	      if (g && g.getBoundingClientRect().right >= mX) {
-	        var line = lineAtHeight(cm.doc, mY);
-	        var gutter = cm.options.gutters[i];
-	        signal(cm, type, cm, line, gutter, e);
-	        return e_defaultPrevented(e);
-	      }
-	    }
-	  }
-
-	  function clickInGutter(cm, e) {
-	    return gutterEvent(cm, e, "gutterClick", true);
-	  }
-
-	  // Kludge to work around strange IE behavior where it'll sometimes
-	  // re-fire a series of drag-related events right after the drop (#1551)
-	  var lastDrop = 0;
-
-	  function onDrop(e) {
-	    var cm = this;
-	    clearDragCursor(cm);
-	    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
-	      return;
-	    e_preventDefault(e);
-	    if (ie) lastDrop = +new Date;
-	    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
-	    if (!pos || cm.isReadOnly()) return;
-	    // Might be a file drop, in which case we simply extract the text
-	    // and insert it.
-	    if (files && files.length && window.FileReader && window.File) {
-	      var n = files.length, text = Array(n), read = 0;
-	      var loadFile = function(file, i) {
-	        if (cm.options.allowDropFileTypes &&
-	            indexOf(cm.options.allowDropFileTypes, file.type) == -1)
-	          return;
-
-	        var reader = new FileReader;
-	        reader.onload = operation(cm, function() {
-	          var content = reader.result;
-	          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) content = "";
-	          text[i] = content;
-	          if (++read == n) {
-	            pos = clipPos(cm.doc, pos);
-	            var change = {from: pos, to: pos,
-	                          text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
-	                          origin: "paste"};
-	            makeChange(cm.doc, change);
-	            setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
-	          }
-	        });
-	        reader.readAsText(file);
-	      };
-	      for (var i = 0; i < n; ++i) loadFile(files[i], i);
-	    } else { // Normal drop
-	      // Don't do a replace if the drop happened inside of the selected text.
-	      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
-	        cm.state.draggingText(e);
-	        // Ensure the editor is re-focused
-	        setTimeout(function() {cm.display.input.focus();}, 20);
-	        return;
-	      }
-	      try {
-	        var text = e.dataTransfer.getData("Text");
-	        if (text) {
-	          if (cm.state.draggingText && !cm.state.draggingText.copy)
-	            var selected = cm.listSelections();
-	          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
-	          if (selected) for (var i = 0; i < selected.length; ++i)
-	            replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag");
-	          cm.replaceSelection(text, "around", "paste");
-	          cm.display.input.focus();
-	        }
-	      }
-	      catch(e){}
-	    }
-	  }
-
-	  function onDragStart(cm, e) {
-	    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
-	    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
-
-	    e.dataTransfer.setData("Text", cm.getSelection());
-	    e.dataTransfer.effectAllowed = "copyMove"
-
-	    // Use dummy image instead of default browsers image.
-	    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
-	    if (e.dataTransfer.setDragImage && !safari) {
-	      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
-	      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
-	      if (presto) {
-	        img.width = img.height = 1;
-	        cm.display.wrapper.appendChild(img);
-	        // Force a relayout, or Opera won't use our image for some obscure reason
-	        img._top = img.offsetTop;
-	      }
-	      e.dataTransfer.setDragImage(img, 0, 0);
-	      if (presto) img.parentNode.removeChild(img);
-	    }
-	  }
-
-	  function onDragOver(cm, e) {
-	    var pos = posFromMouse(cm, e);
-	    if (!pos) return;
-	    var frag = document.createDocumentFragment();
-	    drawSelectionCursor(cm, pos, frag);
-	    if (!cm.display.dragCursor) {
-	      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
-	      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
-	    }
-	    removeChildrenAndAdd(cm.display.dragCursor, frag);
-	  }
-
-	  function clearDragCursor(cm) {
-	    if (cm.display.dragCursor) {
-	      cm.display.lineSpace.removeChild(cm.display.dragCursor);
-	      cm.display.dragCursor = null;
-	    }
-	  }
-
-	  // SCROLL EVENTS
-
-	  // Sync the scrollable area and scrollbars, ensure the viewport
-	  // covers the visible area.
-	  function setScrollTop(cm, val) {
-	    if (Math.abs(cm.doc.scrollTop - val) < 2) return;
-	    cm.doc.scrollTop = val;
-	    if (!gecko) updateDisplaySimple(cm, {top: val});
-	    if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
-	    cm.display.scrollbars.setScrollTop(val);
-	    if (gecko) updateDisplaySimple(cm);
-	    startWorker(cm, 100);
-	  }
-	  // Sync scroller and scrollbar, ensure the gutter elements are
-	  // aligned.
-	  function setScrollLeft(cm, val, isScroller) {
-	    if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
-	    val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
-	    cm.doc.scrollLeft = val;
-	    alignHorizontally(cm);
-	    if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
-	    cm.display.scrollbars.setScrollLeft(val);
-	  }
-
-	  // Since the delta values reported on mouse wheel events are
-	  // unstandardized between browsers and even browser versions, and
-	  // generally horribly unpredictable, this code starts by measuring
-	  // the scroll effect that the first few mouse wheel events have,
-	  // and, from that, detects the way it can convert deltas to pixel
-	  // offsets afterwards.
-	  //
-	  // The reason we want to know the amount a wheel event will scroll
-	  // is that it gives us a chance to update the display before the
-	  // actual scrolling happens, reducing flickering.
-
-	  var wheelSamples = 0, wheelPixelsPerUnit = null;
-	  // Fill in a browser-detected starting value on browsers where we
-	  // know one. These don't have to be accurate -- the result of them
-	  // being wrong would just be a slight flicker on the first wheel
-	  // scroll (if it is large enough).
-	  if (ie) wheelPixelsPerUnit = -.53;
-	  else if (gecko) wheelPixelsPerUnit = 15;
-	  else if (chrome) wheelPixelsPerUnit = -.7;
-	  else if (safari) wheelPixelsPerUnit = -1/3;
-
-	  var wheelEventDelta = function(e) {
-	    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
-	    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
-	    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
-	    else if (dy == null) dy = e.wheelDelta;
-	    return {x: dx, y: dy};
-	  };
-	  CodeMirror.wheelEventPixels = function(e) {
-	    var delta = wheelEventDelta(e);
-	    delta.x *= wheelPixelsPerUnit;
-	    delta.y *= wheelPixelsPerUnit;
-	    return delta;
-	  };
-
-	  function onScrollWheel(cm, e) {
-	    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
-
-	    var display = cm.display, scroll = display.scroller;
-	    // Quit if there's nothing to scroll here
-	    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
-	    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
-	    if (!(dx && canScrollX || dy && canScrollY)) return;
-
-	    // Webkit browsers on OS X abort momentum scrolls when the target
-	    // of the scroll event is removed from the scrollable element.
-	    // This hack (see related code in patchDisplay) makes sure the
-	    // element is kept around.
-	    if (dy && mac && webkit) {
-	      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
-	        for (var i = 0; i < view.length; i++) {
-	          if (view[i].node == cur) {
-	            cm.display.currentWheelTarget = cur;
-	            break outer;
-	          }
-	        }
-	      }
-	    }
-
-	    // On some browsers, horizontal scrolling will cause redraws to
-	    // happen before the gutter has been realigned, causing it to
-	    // wriggle around in a most unseemly way. When we have an
-	    // estimated pixels/delta value, we just handle horizontal
-	    // scrolling entirely here. It'll be slightly off from native, but
-	    // better than glitching out.
-	    if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
-	      if (dy && canScrollY)
-	        setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
-	      setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
-	      // Only prevent default scrolling if vertical scrolling is
-	      // actually possible. Otherwise, it causes vertical scroll
-	      // jitter on OSX trackpads when deltaX is small and deltaY
-	      // is large (issue #3579)
-	      if (!dy || (dy && canScrollY))
-	        e_preventDefault(e);
-	      display.wheelStartX = null; // Abort measurement, if in progress
-	      return;
-	    }
-
-	    // 'Project' the visible viewport to cover the area that is being
-	    // scrolled into view (if we know enough to estimate it).
-	    if (dy && wheelPixelsPerUnit != null) {
-	      var pixels = dy * wheelPixelsPerUnit;
-	      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
-	      if (pixels < 0) top = Math.max(0, top + pixels - 50);
-	      else bot = Math.min(cm.doc.height, bot + pixels + 50);
-	      updateDisplaySimple(cm, {top: top, bottom: bot});
-	    }
-
-	    if (wheelSamples < 20) {
-	      if (display.wheelStartX == null) {
-	        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
-	        display.wheelDX = dx; display.wheelDY = dy;
-	        setTimeout(function() {
-	          if (display.wheelStartX == null) return;
-	          var movedX = scroll.scrollLeft - display.wheelStartX;
-	          var movedY = scroll.scrollTop - display.wheelStartY;
-	          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
-	            (movedX && display.wheelDX && movedX / display.wheelDX);
-	          display.wheelStartX = display.wheelStartY = null;
-	          if (!sample) return;
-	          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
-	          ++wheelSamples;
-	        }, 200);
-	      } else {
-	        display.wheelDX += dx; display.wheelDY += dy;
-	      }
-	    }
-	  }
-
-	  // KEY EVENTS
-
-	  // Run a handler that was bound to a key.
-	  function doHandleBinding(cm, bound, dropShift) {
-	    if (typeof bound == "string") {
-	      bound = commands[bound];
-	      if (!bound) return false;
-	    }
-	    // Ensure previous input has been read, so that the handler sees a
-	    // consistent view of the document
-	    cm.display.input.ensurePolled();
-	    var prevShift = cm.display.shift, done = false;
+	      // Add new sub-event
+	      cur.changes.push(historyChangeFromChange(doc, change))
+	    }
+	  } else {
+	    // Can not be merged, start a new event.
+	    var before = lst(hist.done)
+	    if (!before || !before.ranges)
+	      { pushSelectionToHistory(doc.sel, hist.done) }
+	    cur = {changes: [historyChangeFromChange(doc, change)],
+	           generation: hist.generation}
+	    hist.done.push(cur)
+	    while (hist.done.length > hist.undoDepth) {
+	      hist.done.shift()
+	      if (!hist.done[0].ranges) { hist.done.shift() }
+	    }
+	  }
+	  hist.done.push(selAfter)
+	  hist.generation = ++hist.maxGeneration
+	  hist.lastModTime = hist.lastSelTime = time
+	  hist.lastOp = hist.lastSelOp = opId
+	  hist.lastOrigin = hist.lastSelOrigin = change.origin
+
+	  if (!last) { signal(doc, "historyAdded") }
+	}
+
+	function selectionEventCanBeMerged(doc, origin, prev, sel) {
+	  var ch = origin.charAt(0)
+	  return ch == "*" ||
+	    ch == "+" &&
+	    prev.ranges.length == sel.ranges.length &&
+	    prev.somethingSelected() == sel.somethingSelected() &&
+	    new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+	}
+
+	// Called whenever the selection changes, sets the new selection as
+	// the pending selection in the history, and pushes the old pending
+	// selection into the 'done' array when it was significantly
+	// different (in number of selected ranges, emptiness, or time).
+	function addSelectionToHistory(doc, sel, opId, options) {
+	  var hist = doc.history, origin = options && options.origin
+
+	  // A new event is started when the previous origin does not match
+	  // the current, or the origins don't allow matching. Origins
+	  // starting with * are always merged, those starting with + are
+	  // merged when similar and close together in time.
+	  if (opId == hist.lastSelOp ||
+	      (origin && hist.lastSelOrigin == origin &&
+	       (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+	        selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+	    { hist.done[hist.done.length - 1] = sel }
+	  else
+	    { pushSelectionToHistory(sel, hist.done) }
+
+	  hist.lastSelTime = +new Date
+	  hist.lastSelOrigin = origin
+	  hist.lastSelOp = opId
+	  if (options && options.clearRedo !== false)
+	    { clearSelectionEvents(hist.undone) }
+	}
+
+	function pushSelectionToHistory(sel, dest) {
+	  var top = lst(dest)
+	  if (!(top && top.ranges && top.equals(sel)))
+	    { dest.push(sel) }
+	}
+
+	// Used to store marked span information in the history.
+	function attachLocalSpans(doc, change, from, to) {
+	  var existing = change["spans_" + doc.id], n = 0
+	  doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+	    if (line.markedSpans)
+	      { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans }
+	    ++n
+	  })
+	}
+
+	// When un/re-doing restores text containing marked spans, those
+	// that have been explicitly cleared should not be restored.
+	function removeClearedSpans(spans) {
+	  if (!spans) { return null }
+	  var out
+	  for (var i = 0; i < spans.length; ++i) {
+	    if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i) } }
+	    else if (out) { out.push(spans[i]) }
+	  }
+	  return !out ? spans : out.length ? out : null
+	}
+
+	// Retrieve and filter the old marked spans stored in a change event.
+	function getOldSpans(doc, change) {
+	  var found = change["spans_" + doc.id]
+	  if (!found) { return null }
+	  var nw = []
+	  for (var i = 0; i < change.text.length; ++i)
+	    { nw.push(removeClearedSpans(found[i])) }
+	  return nw
+	}
+
+	// Used for un/re-doing changes from the history. Combines the
+	// result of computing the existing spans with the set of spans that
+	// existed in the history (so that deleting around a span and then
+	// undoing brings back the span).
+	function mergeOldSpans(doc, change) {
+	  var old = getOldSpans(doc, change)
+	  var stretched = stretchSpansOverChange(doc, change)
+	  if (!old) { return stretched }
+	  if (!stretched) { return old }
+
+	  for (var i = 0; i < old.length; ++i) {
+	    var oldCur = old[i], stretchCur = stretched[i]
+	    if (oldCur && stretchCur) {
+	      spans: for (var j = 0; j < stretchCur.length; ++j) {
+	        var span = stretchCur[j]
+	        for (var k = 0; k < oldCur.length; ++k)
+	          { if (oldCur[k].marker == span.marker) { continue spans } }
+	        oldCur.push(span)
+	      }
+	    } else if (stretchCur) {
+	      old[i] = stretchCur
+	    }
+	  }
+	  return old
+	}
+
+	// Used both to provide a JSON-safe object in .getHistory, and, when
+	// detaching a document, to split the history in two
+	function copyHistoryArray(events, newGroup, instantiateSel) {
+	  var copy = []
+	  for (var i = 0; i < events.length; ++i) {
+	    var event = events[i]
+	    if (event.ranges) {
+	      copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event)
+	      continue
+	    }
+	    var changes = event.changes, newChanges = []
+	    copy.push({changes: newChanges})
+	    for (var j = 0; j < changes.length; ++j) {
+	      var change = changes[j], m = (void 0)
+	      newChanges.push({from: change.from, to: change.to, text: change.text})
+	      if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+	        if (indexOf(newGroup, Number(m[1])) > -1) {
+	          lst(newChanges)[prop] = change[prop]
+	          delete change[prop]
+	        }
+	      } } }
+	    }
+	  }
+	  return copy
+	}
+
+	// The 'scroll' parameter given to many of these indicated whether
+	// the new cursor position should be scrolled into view after
+	// modifying the selection.
+
+	// If shift is held or the extend flag is set, extends a range to
+	// include a given position (and optionally a second position).
+	// Otherwise, simply returns the range between the given positions.
+	// Used for cursor motion and such.
+	function extendRange(range, head, other, extend) {
+	  if (extend) {
+	    var anchor = range.anchor
+	    if (other) {
+	      var posBefore = cmp(head, anchor) < 0
+	      if (posBefore != (cmp(other, anchor) < 0)) {
+	        anchor = head
+	        head = other
+	      } else if (posBefore != (cmp(head, other) < 0)) {
+	        head = other
+	      }
+	    }
+	    return new Range(anchor, head)
+	  } else {
+	    return new Range(other || head, head)
+	  }
+	}
+
+	// Extend the primary selection range, discard the rest.
+	function extendSelection(doc, head, other, options, extend) {
+	  if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend) }
+	  setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options)
+	}
+
+	// Extend all selections (pos is an array of selections with length
+	// equal the number of selections)
+	function extendSelections(doc, heads, options) {
+	  var out = []
+	  var extend = doc.cm && (doc.cm.display.shift || doc.extend)
+	  for (var i = 0; i < doc.sel.ranges.length; i++)
+	    { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend) }
+	  var newSel = normalizeSelection(out, doc.sel.primIndex)
+	  setSelection(doc, newSel, options)
+	}
+
+	// Updates a single range in the selection.
+	function replaceOneSelection(doc, i, range, options) {
+	  var ranges = doc.sel.ranges.slice(0)
+	  ranges[i] = range
+	  setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options)
+	}
+
+	// Reset the selection to a single range.
+	function setSimpleSelection(doc, anchor, head, options) {
+	  setSelection(doc, simpleSelection(anchor, head), options)
+	}
+
+	// Give beforeSelectionChange handlers a change to influence a
+	// selection update.
+	function filterSelectionChange(doc, sel, options) {
+	  var obj = {
+	    ranges: sel.ranges,
+	    update: function(ranges) {
+	      var this$1 = this;
+
+	      this.ranges = []
+	      for (var i = 0; i < ranges.length; i++)
+	        { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+	                                   clipPos(doc, ranges[i].head)) }
+	    },
+	    origin: options && options.origin
+	  }
+	  signal(doc, "beforeSelectionChange", doc, obj)
+	  if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj) }
+	  if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
+	  else { return sel }
+	}
+
+	function setSelectionReplaceHistory(doc, sel, options) {
+	  var done = doc.history.done, last = lst(done)
+	  if (last && last.ranges) {
+	    done[done.length - 1] = sel
+	    setSelectionNoUndo(doc, sel, options)
+	  } else {
+	    setSelection(doc, sel, options)
+	  }
+	}
+
+	// Set a new selection.
+	function setSelection(doc, sel, options) {
+	  setSelectionNoUndo(doc, sel, options)
+	  addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
+	}
+
+	function setSelectionNoUndo(doc, sel, options) {
+	  if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+	    { sel = filterSelectionChange(doc, sel, options) }
+
+	  var bias = options && options.bias ||
+	    (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
+	  setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))
+
+	  if (!(options && options.scroll === false) && doc.cm)
+	    { ensureCursorVisible(doc.cm) }
+	}
+
+	function setSelectionInner(doc, sel) {
+	  if (sel.equals(doc.sel)) { return }
+
+	  doc.sel = sel
+
+	  if (doc.cm) {
+	    doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true
+	    signalCursorActivity(doc.cm)
+	  }
+	  signalLater(doc, "cursorActivity", doc)
+	}
+
+	// Verify that the selection does not partially select any atomic
+	// marked ranges.
+	function reCheckSelection(doc) {
+	  setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false))
+	}
+
+	// Return a selection that does not partially select any atomic
+	// ranges.
+	function skipAtomicInSelection(doc, sel, bias, mayClear) {
+	  var out
+	  for (var i = 0; i < sel.ranges.length; i++) {
+	    var range = sel.ranges[i]
+	    var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
+	    var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
+	    var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
+	    if (out || newAnchor != range.anchor || newHead != range.head) {
+	      if (!out) { out = sel.ranges.slice(0, i) }
+	      out[i] = new Range(newAnchor, newHead)
+	    }
+	  }
+	  return out ? normalizeSelection(out, sel.primIndex) : sel
+	}
+
+	function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+	  var line = getLine(doc, pos.line)
+	  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+	    var sp = line.markedSpans[i], m = sp.marker
+	    if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+	        (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+	      if (mayClear) {
+	        signal(m, "beforeCursorEnter")
+	        if (m.explicitlyCleared) {
+	          if (!line.markedSpans) { break }
+	          else {--i; continue}
+	        }
+	      }
+	      if (!m.atomic) { continue }
+
+	      if (oldPos) {
+	        var near = m.find(dir < 0 ? 1 : -1), diff = (void 0)
+	        if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+	          { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) }
+	        if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+	          { return skipAtomicInner(doc, near, pos, dir, mayClear) }
+	      }
+
+	      var far = m.find(dir < 0 ? -1 : 1)
+	      if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+	        { far = movePos(doc, far, dir, far.line == pos.line ? line : null) }
+	      return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+	    }
+	  } }
+	  return pos
+	}
+
+	// Ensure a given position is not inside an atomic range.
+	function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+	  var dir = bias || 1
+	  var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+	      (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+	      skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+	      (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
+	  if (!found) {
+	    doc.cantEdit = true
+	    return Pos(doc.first, 0)
+	  }
+	  return found
+	}
+
+	function movePos(doc, pos, dir, line) {
+	  if (dir < 0 && pos.ch == 0) {
+	    if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+	    else { return null }
+	  } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+	    if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+	    else { return null }
+	  } else {
+	    return new Pos(pos.line, pos.ch + dir)
+	  }
+	}
+
+	function selectAll(cm) {
+	  cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)
+	}
+
+	// UPDATING
+
+	// Allow "beforeChange" event handlers to influence a change
+	function filterChange(doc, change, update) {
+	  var obj = {
+	    canceled: false,
+	    from: change.from,
+	    to: change.to,
+	    text: change.text,
+	    origin: change.origin,
+	    cancel: function () { return obj.canceled = true; }
+	  }
+	  if (update) { obj.update = function (from, to, text, origin) {
+	    if (from) { obj.from = clipPos(doc, from) }
+	    if (to) { obj.to = clipPos(doc, to) }
+	    if (text) { obj.text = text }
+	    if (origin !== undefined) { obj.origin = origin }
+	  } }
+	  signal(doc, "beforeChange", doc, obj)
+	  if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj) }
+
+	  if (obj.canceled) { return null }
+	  return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+	}
+
+	// Apply a change to a document, and add it to the document's
+	// history, and propagating it to all linked documents.
+	function makeChange(doc, change, ignoreReadOnly) {
+	  if (doc.cm) {
+	    if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+	    if (doc.cm.state.suppressEdits) { return }
+	  }
+
+	  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+	    change = filterChange(doc, change, true)
+	    if (!change) { return }
+	  }
+
+	  // Possibly split or suppress the update based on the presence
+	  // of read-only spans in its range.
+	  var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to)
+	  if (split) {
+	    for (var i = split.length - 1; i >= 0; --i)
+	      { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text}) }
+	  } else {
+	    makeChangeInner(doc, change)
+	  }
+	}
+
+	function makeChangeInner(doc, change) {
+	  if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+	  var selAfter = computeSelAfterChange(doc, change)
+	  addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN)
+
+	  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change))
+	  var rebased = []
+
+	  linkedDocs(doc, function (doc, sharedHist) {
+	    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+	      rebaseHist(doc.history, change)
+	      rebased.push(doc.history)
+	    }
+	    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change))
+	  })
+	}
+
+	// Revert a change stored in a document's history.
+	function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+	  if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }
+
+	  var hist = doc.history, event, selAfter = doc.sel
+	  var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done
+
+	  // Verify that there is a useable event (so that ctrl-z won't
+	  // needlessly clear selection events)
+	  var i = 0
+	  for (; i < source.length; i++) {
+	    event = source[i]
+	    if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+	      { break }
+	  }
+	  if (i == source.length) { return }
+	  hist.lastOrigin = hist.lastSelOrigin = null
+
+	  for (;;) {
+	    event = source.pop()
+	    if (event.ranges) {
+	      pushSelectionToHistory(event, dest)
+	      if (allowSelectionOnly && !event.equals(doc.sel)) {
+	        setSelection(doc, event, {clearRedo: false})
+	        return
+	      }
+	      selAfter = event
+	    }
+	    else { break }
+	  }
+
+	  // Build up a reverse change object to add to the opposite history
+	  // stack (redo when undoing, and vice versa).
+	  var antiChanges = []
+	  pushSelectionToHistory(selAfter, dest)
+	  dest.push({changes: antiChanges, generation: hist.generation})
+	  hist.generation = event.generation || ++hist.maxGeneration
+
+	  var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")
+
+	  var loop = function ( i ) {
+	    var change = event.changes[i]
+	    change.origin = type
+	    if (filter && !filterChange(doc, change, false)) {
+	      source.length = 0
+	      return {}
+	    }
+
+	    antiChanges.push(historyChangeFromChange(doc, change))
+
+	    var after = i ? computeSelAfterChange(doc, change) : lst(source)
+	    makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change))
+	    if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}) }
+	    var rebased = []
+
+	    // Propagate to the linked documents
+	    linkedDocs(doc, function (doc, sharedHist) {
+	      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+	        rebaseHist(doc.history, change)
+	        rebased.push(doc.history)
+	      }
+	      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change))
+	    })
+	  };
+
+	  for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+	    var returned = loop( i$1 );
+
+	    if ( returned ) return returned.v;
+	  }
+	}
+
+	// Sub-views need their line numbers shifted when text is added
+	// above or below them in the parent document.
+	function shiftDoc(doc, distance) {
+	  if (distance == 0) { return }
+	  doc.first += distance
+	  doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+	    Pos(range.anchor.line + distance, range.anchor.ch),
+	    Pos(range.head.line + distance, range.head.ch)
+	  ); }), doc.sel.primIndex)
+	  if (doc.cm) {
+	    regChange(doc.cm, doc.first, doc.first - distance, distance)
+	    for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+	      { regLineChange(doc.cm, l, "gutter") }
+	  }
+	}
+
+	// More lower-level change function, handling only a single document
+	// (not linked ones).
+	function makeChangeSingleDoc(doc, change, selAfter, spans) {
+	  if (doc.cm && !doc.cm.curOp)
+	    { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+	  if (change.to.line < doc.first) {
+	    shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line))
+	    return
+	  }
+	  if (change.from.line > doc.lastLine()) { return }
+
+	  // Clip the change to the size of this doc
+	  if (change.from.line < doc.first) {
+	    var shift = change.text.length - 1 - (doc.first - change.from.line)
+	    shiftDoc(doc, shift)
+	    change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+	              text: [lst(change.text)], origin: change.origin}
+	  }
+	  var last = doc.lastLine()
+	  if (change.to.line > last) {
+	    change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+	              text: [change.text[0]], origin: change.origin}
+	  }
+
+	  change.removed = getBetween(doc, change.from, change.to)
+
+	  if (!selAfter) { selAfter = computeSelAfterChange(doc, change) }
+	  if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans) }
+	  else { updateDoc(doc, change, spans) }
+	  setSelectionNoUndo(doc, selAfter, sel_dontScroll)
+	}
+
+	// Handle the interaction of a change to a document with the editor
+	// that this document is part of.
+	function makeChangeSingleDocInEditor(cm, change, spans) {
+	  var doc = cm.doc, display = cm.display, from = change.from, to = change.to
+
+	  var recomputeMaxLength = false, checkWidthStart = from.line
+	  if (!cm.options.lineWrapping) {
+	    checkWidthStart = lineNo(visualLine(getLine(doc, from.line)))
+	    doc.iter(checkWidthStart, to.line + 1, function (line) {
+	      if (line == display.maxLine) {
+	        recomputeMaxLength = true
+	        return true
+	      }
+	    })
+	  }
+
+	  if (doc.sel.contains(change.from, change.to) > -1)
+	    { signalCursorActivity(cm) }
+
+	  updateDoc(doc, change, spans, estimateHeight(cm))
+
+	  if (!cm.options.lineWrapping) {
+	    doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+	      var len = lineLength(line)
+	      if (len > display.maxLineLength) {
+	        display.maxLine = line
+	        display.maxLineLength = len
+	        display.maxLineChanged = true
+	        recomputeMaxLength = false
+	      }
+	    })
+	    if (recomputeMaxLength) { cm.curOp.updateMaxLine = true }
+	  }
+
+	  retreatFrontier(doc, from.line)
+	  startWorker(cm, 400)
+
+	  var lendiff = change.text.length - (to.line - from.line) - 1
+	  // Remember that these lines changed, for updating the display
+	  if (change.full)
+	    { regChange(cm) }
+	  else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+	    { regLineChange(cm, from.line, "text") }
+	  else
+	    { regChange(cm, from.line, to.line + 1, lendiff) }
+
+	  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change")
+	  if (changeHandler || changesHandler) {
+	    var obj = {
+	      from: from, to: to,
+	      text: change.text,
+	      removed: change.removed,
+	      origin: change.origin
+	    }
+	    if (changeHandler) { signalLater(cm, "change", cm, obj) }
+	    if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj) }
+	  }
+	  cm.display.selForContextMenu = null
+	}
+
+	function replaceRange(doc, code, from, to, origin) {
+	  if (!to) { to = from }
+	  if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp }
+	  if (typeof code == "string") { code = doc.splitLines(code) }
+	  makeChange(doc, {from: from, to: to, text: code, origin: origin})
+	}
+
+	// Rebasing/resetting history to deal with externally-sourced changes
+
+	function rebaseHistSelSingle(pos, from, to, diff) {
+	  if (to < pos.line) {
+	    pos.line += diff
+	  } else if (from < pos.line) {
+	    pos.line = from
+	    pos.ch = 0
+	  }
+	}
+
+	// Tries to rebase an array of history events given a change in the
+	// document. If the change touches the same lines as the event, the
+	// event, and everything 'behind' it, is discarded. If the change is
+	// before the event, the event's positions are updated. Uses a
+	// copy-on-write scheme for the positions, to avoid having to
+	// reallocate them all on every rebase, but also avoid problems with
+	// shared position objects being unsafely updated.
+	function rebaseHistArray(array, from, to, diff) {
+	  for (var i = 0; i < array.length; ++i) {
+	    var sub = array[i], ok = true
+	    if (sub.ranges) {
+	      if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true }
+	      for (var j = 0; j < sub.ranges.length; j++) {
+	        rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff)
+	        rebaseHistSelSingle(sub.ranges[j].head, from, to, diff)
+	      }
+	      continue
+	    }
+	    for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+	      var cur = sub.changes[j$1]
+	      if (to < cur.from.line) {
+	        cur.from = Pos(cur.from.line + diff, cur.from.ch)
+	        cur.to = Pos(cur.to.line + diff, cur.to.ch)
+	      } else if (from <= cur.to.line) {
+	        ok = false
+	        break
+	      }
+	    }
+	    if (!ok) {
+	      array.splice(0, i + 1)
+	      i = 0
+	    }
+	  }
+	}
+
+	function rebaseHist(hist, change) {
+	  var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1
+	  rebaseHistArray(hist.done, from, to, diff)
+	  rebaseHistArray(hist.undone, from, to, diff)
+	}
+
+	// Utility for applying a change to a line by handle or number,
+	// returning the number and optionally registering the line as
+	// changed.
+	function changeLine(doc, handle, changeType, op) {
+	  var no = handle, line = handle
+	  if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)) }
+	  else { no = lineNo(handle) }
+	  if (no == null) { return null }
+	  if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType) }
+	  return line
+	}
+
+	// The document is represented as a BTree consisting of leaves, with
+	// chunk of lines in them, and branches, with up to ten leaves or
+	// other branch nodes below them. The top node is always a branch
+	// node, and is the document object itself (meaning it has
+	// additional methods and properties).
+	//
+	// All nodes have parent links. The tree is used both to go from
+	// line numbers to line objects, and to go from objects to numbers.
+	// It also indexes by height, and is used to convert between height
+	// and line object, and to find the total height of the document.
+	//
+	// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+	function LeafChunk(lines) {
+	  var this$1 = this;
+
+	  this.lines = lines
+	  this.parent = null
+	  var height = 0
+	  for (var i = 0; i < lines.length; ++i) {
+	    lines[i].parent = this$1
+	    height += lines[i].height
+	  }
+	  this.height = height
+	}
+
+	LeafChunk.prototype = {
+	  chunkSize: function chunkSize() { return this.lines.length },
+
+	  // Remove the n lines at offset 'at'.
+	  removeInner: function removeInner(at, n) {
+	    var this$1 = this;
+
+	    for (var i = at, e = at + n; i < e; ++i) {
+	      var line = this$1.lines[i]
+	      this$1.height -= line.height
+	      cleanUpLine(line)
+	      signalLater(line, "delete")
+	    }
+	    this.lines.splice(at, n)
+	  },
+
+	  // Helper used to collapse a small branch into a single leaf.
+	  collapse: function collapse(lines) {
+	    lines.push.apply(lines, this.lines)
+	  },
+
+	  // Insert the given array of lines at offset 'at', count them as
+	  // having the given height.
+	  insertInner: function insertInner(at, lines, height) {
+	    var this$1 = this;
+
+	    this.height += height
+	    this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at))
+	    for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1 }
+	  },
+
+	  // Used to iterate over a part of the tree.
+	  iterN: function iterN(at, n, op) {
+	    var this$1 = this;
+
+	    for (var e = at + n; at < e; ++at)
+	      { if (op(this$1.lines[at])) { return true } }
+	  }
+	}
+
+	function BranchChunk(children) {
+	  var this$1 = this;
+
+	  this.children = children
+	  var size = 0, height = 0
+	  for (var i = 0; i < children.length; ++i) {
+	    var ch = children[i]
+	    size += ch.chunkSize(); height += ch.height
+	    ch.parent = this$1
+	  }
+	  this.size = size
+	  this.height = height
+	  this.parent = null
+	}
+
+	BranchChunk.prototype = {
+	  chunkSize: function chunkSize() { return this.size },
+
+	  removeInner: function removeInner(at, n) {
+	    var this$1 = this;
+
+	    this.size -= n
+	    for (var i = 0; i < this.children.length; ++i) {
+	      var child = this$1.children[i], sz = child.chunkSize()
+	      if (at < sz) {
+	        var rm = Math.min(n, sz - at), oldHeight = child.height
+	        child.removeInner(at, rm)
+	        this$1.height -= oldHeight - child.height
+	        if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null }
+	        if ((n -= rm) == 0) { break }
+	        at = 0
+	      } else { at -= sz }
+	    }
+	    // If the result is smaller than 25 lines, ensure that it is a
+	    // single leaf node.
+	    if (this.size - n < 25 &&
+	        (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+	      var lines = []
+	      this.collapse(lines)
+	      this.children = [new LeafChunk(lines)]
+	      this.children[0].parent = this
+	    }
+	  },
+
+	  collapse: function collapse(lines) {
+	    var this$1 = this;
+
+	    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines) }
+	  },
+
+	  insertInner: function insertInner(at, lines, height) {
+	    var this$1 = this;
+
+	    this.size += lines.length
+	    this.height += height
+	    for (var i = 0; i < this.children.length; ++i) {
+	      var child = this$1.children[i], sz = child.chunkSize()
+	      if (at <= sz) {
+	        child.insertInner(at, lines, height)
+	        if (child.lines && child.lines.length > 50) {
+	          // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+	          // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+	          var remaining = child.lines.length % 25 + 25
+	          for (var pos = remaining; pos < child.lines.length;) {
+	            var leaf = new LeafChunk(child.lines.slice(pos, pos += 25))
+	            child.height -= leaf.height
+	            this$1.children.splice(++i, 0, leaf)
+	            leaf.parent = this$1
+	          }
+	          child.lines = child.lines.slice(0, remaining)
+	          this$1.maybeSpill()
+	        }
+	        break
+	      }
+	      at -= sz
+	    }
+	  },
+
+	  // When a node has grown, check whether it should be split.
+	  maybeSpill: function maybeSpill() {
+	    if (this.children.length <= 10) { return }
+	    var me = this
+	    do {
+	      var spilled = me.children.splice(me.children.length - 5, 5)
+	      var sibling = new BranchChunk(spilled)
+	      if (!me.parent) { // Become the parent node
+	        var copy = new BranchChunk(me.children)
+	        copy.parent = me
+	        me.children = [copy, sibling]
+	        me = copy
+	     } else {
+	        me.size -= sibling.size
+	        me.height -= sibling.height
+	        var myIndex = indexOf(me.parent.children, me)
+	        me.parent.children.splice(myIndex + 1, 0, sibling)
+	      }
+	      sibling.parent = me.parent
+	    } while (me.children.length > 10)
+	    me.parent.maybeSpill()
+	  },
+
+	  iterN: function iterN(at, n, op) {
+	    var this$1 = this;
+
+	    for (var i = 0; i < this.children.length; ++i) {
+	      var child = this$1.children[i], sz = child.chunkSize()
+	      if (at < sz) {
+	        var used = Math.min(n, sz - at)
+	        if (child.iterN(at, used, op)) { return true }
+	        if ((n -= used) == 0) { break }
+	        at = 0
+	      } else { at -= sz }
+	    }
+	  }
+	}
+
+	// Line widgets are block elements displayed above or below a line.
+
+	var LineWidget = function(doc, node, options) {
+	  var this$1 = this;
+
+	  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+	    { this$1[opt] = options[opt] } } }
+	  this.doc = doc
+	  this.node = node
+	};
+
+	LineWidget.prototype.clear = function () {
+	    var this$1 = this;
+
+	  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line)
+	  if (no == null || !ws) { return }
+	  for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1) } }
+	  if (!ws.length) { line.widgets = null }
+	  var height = widgetHeight(this)
+	  updateLineHeight(line, Math.max(0, line.height - height))
+	  if (cm) {
+	    runInOp(cm, function () {
+	      adjustScrollWhenAboveVisible(cm, line, -height)
+	      regLineChange(cm, no, "widget")
+	    })
+	    signalLater(cm, "lineWidgetCleared", cm, this, no)
+	  }
+	};
+
+	LineWidget.prototype.changed = function () {
+	    var this$1 = this;
+
+	  var oldH = this.height, cm = this.doc.cm, line = this.line
+	  this.height = null
+	  var diff = widgetHeight(this) - oldH
+	  if (!diff) { return }
+	  updateLineHeight(line, line.height + diff)
+	  if (cm) {
+	    runInOp(cm, function () {
+	      cm.curOp.forceUpdate = true
+	      adjustScrollWhenAboveVisible(cm, line, diff)
+	      signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line))
+	    })
+	  }
+	};
+	eventMixin(LineWidget)
+
+	function adjustScrollWhenAboveVisible(cm, line, diff) {
+	  if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+	    { addToScrollTop(cm, diff) }
+	}
+
+	function addLineWidget(doc, handle, node, options) {
+	  var widget = new LineWidget(doc, node, options)
+	  var cm = doc.cm
+	  if (cm && widget.noHScroll) { cm.display.alignWidgets = true }
+	  changeLine(doc, handle, "widget", function (line) {
+	    var widgets = line.widgets || (line.widgets = [])
+	    if (widget.insertAt == null) { widgets.push(widget) }
+	    else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget) }
+	    widget.line = line
+	    if (cm && !lineIsHidden(doc, line)) {
+	      var aboveVisible = heightAtLine(line) < doc.scrollTop
+	      updateLineHeight(line, line.height + widgetHeight(widget))
+	      if (aboveVisible) { addToScrollTop(cm, widget.height) }
+	      cm.curOp.forceUpdate = true
+	    }
+	    return true
+	  })
+	  signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle))
+	  return widget
+	}
+
+	// TEXTMARKERS
+
+	// Created with markText and setBookmark methods. A TextMarker is a
+	// handle that can be used to clear or find a marked position in the
+	// document. Line objects hold arrays (markedSpans) containing
+	// {from, to, marker} object pointing to such marker objects, and
+	// indicating that such a marker is present on that line. Multiple
+	// lines may point to the same marker when it spans across lines.
+	// The spans will have null for their from/to properties when the
+	// marker continues beyond the start/end of the line. Markers have
+	// links back to the lines they currently touch.
+
+	// Collapsed markers have unique ids, in order to be able to order
+	// them, which is needed for uniquely determining an outer marker
+	// when they overlap (they may nest, but not partially overlap).
+	var nextMarkerId = 0
+
+	var TextMarker = function(doc, type) {
+	  this.lines = []
+	  this.type = type
+	  this.doc = doc
+	  this.id = ++nextMarkerId
+	};
+
+	// Clear the marker.
+	TextMarker.prototype.clear = function () {
+	    var this$1 = this;
+
+	  if (this.explicitlyCleared) { return }
+	  var cm = this.doc.cm, withOp = cm && !cm.curOp
+	  if (withOp) { startOperation(cm) }
+	  if (hasHandler(this, "clear")) {
+	    var found = this.find()
+	    if (found) { signalLater(this, "clear", found.from, found.to) }
+	  }
+	  var min = null, max = null
+	  for (var i = 0; i < this.lines.length; ++i) {
+	    var line = this$1.lines[i]
+	    var span = getMarkedSpanFor(line.markedSpans, this$1)
+	    if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text") }
+	    else if (cm) {
+	      if (span.to != null) { max = lineNo(line) }
+	      if (span.from != null) { min = lineNo(line) }
+	    }
+	    line.markedSpans = removeMarkedSpan(line.markedSpans, span)
+	    if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
+	      { updateLineHeight(line, textHeight(cm.display)) }
+	  }
+	  if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+	    var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual)
+	    if (len > cm.display.maxLineLength) {
+	      cm.display.maxLine = visual
+	      cm.display.maxLineLength = len
+	      cm.display.maxLineChanged = true
+	    }
+	  } }
+
+	  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1) }
+	  this.lines.length = 0
+	  this.explicitlyCleared = true
+	  if (this.atomic && this.doc.cantEdit) {
+	    this.doc.cantEdit = false
+	    if (cm) { reCheckSelection(cm.doc) }
+	  }
+	  if (cm) { signalLater(cm, "markerCleared", cm, this, min, max) }
+	  if (withOp) { endOperation(cm) }
+	  if (this.parent) { this.parent.clear() }
+	};
+
+	// Find the position of the marker in the document. Returns a {from,
+	// to} object by default. Side can be passed to get a specific side
+	// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+	// Pos objects returned contain a line object, rather than a line
+	// number (used to prevent looking up the same line twice).
+	TextMarker.prototype.find = function (side, lineObj) {
+	    var this$1 = this;
+
+	  if (side == null && this.type == "bookmark") { side = 1 }
+	  var from, to
+	  for (var i = 0; i < this.lines.length; ++i) {
+	    var line = this$1.lines[i]
+	    var span = getMarkedSpanFor(line.markedSpans, this$1)
+	    if (span.from != null) {
+	      from = Pos(lineObj ? line : lineNo(line), span.from)
+	      if (side == -1) { return from }
+	    }
+	    if (span.to != null) {
+	      to = Pos(lineObj ? line : lineNo(line), span.to)
+	      if (side == 1) { return to }
+	    }
+	  }
+	  return from && {from: from, to: to}
+	};
+
+	// Signals that the marker's widget changed, and surrounding layout
+	// should be recomputed.
+	TextMarker.prototype.changed = function () {
+	    var this$1 = this;
+
+	  var pos = this.find(-1, true), widget = this, cm = this.doc.cm
+	  if (!pos || !cm) { return }
+	  runInOp(cm, function () {
+	    var line = pos.line, lineN = lineNo(pos.line)
+	    var view = findViewForLine(cm, lineN)
+	    if (view) {
+	      clearLineMeasurementCacheFor(view)
+	      cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
+	    }
+	    cm.curOp.updateMaxLine = true
+	    if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+	      var oldHeight = widget.height
+	      widget.height = null
+	      var dHeight = widgetHeight(widget) - oldHeight
+	      if (dHeight)
+	        { updateLineHeight(line, line.height + dHeight) }
+	    }
+	    signalLater(cm, "markerChanged", cm, this$1)
+	  })
+	};
+
+	TextMarker.prototype.attachLine = function (line) {
+	  if (!this.lines.length && this.doc.cm) {
+	    var op = this.doc.cm.curOp
+	    if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+	      { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this) }
+	  }
+	  this.lines.push(line)
+	};
+
+	TextMarker.prototype.detachLine = function (line) {
+	  this.lines.splice(indexOf(this.lines, line), 1)
+	  if (!this.lines.length && this.doc.cm) {
+	    var op = this.doc.cm.curOp
+	    ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
+	  }
+	};
+	eventMixin(TextMarker)
+
+	// Create a marker, wire it up to the right lines, and
+	function markText(doc, from, to, options, type) {
+	  // Shared markers (across linked documents) are handled separately
+	  // (markTextShared will call out to this again, once per
+	  // document).
+	  if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+	  // Ensure we are in an operation.
+	  if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+	  var marker = new TextMarker(doc, type), diff = cmp(from, to)
+	  if (options) { copyObj(options, marker, false) }
+	  // Don't connect empty markers unless clearWhenEmpty is false
+	  if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+	    { return marker }
+	  if (marker.replacedWith) {
+	    // Showing up as a widget implies collapsed (widget replaces text)
+	    marker.collapsed = true
+	    marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget")
+	    if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true") }
+	    if (options.insertLeft) { marker.widgetNode.insertLeft = true }
+	  }
+	  if (marker.collapsed) {
+	    if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+	        from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+	      { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+	    seeCollapsedSpans()
+	  }
+
+	  if (marker.addToHistory)
+	    { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN) }
+
+	  var curLine = from.line, cm = doc.cm, updateMaxLine
+	  doc.iter(curLine, to.line + 1, function (line) {
+	    if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+	      { updateMaxLine = true }
+	    if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0) }
+	    addMarkedSpan(line, new MarkedSpan(marker,
+	                                       curLine == from.line ? from.ch : null,
+	                                       curLine == to.line ? to.ch : null))
+	    ++curLine
+	  })
+	  // lineIsHidden depends on the presence of the spans, so needs a second pass
+	  if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+	    if (lineIsHidden(doc, line)) { updateLineHeight(line, 0) }
+	  }) }
+
+	  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }) }
+
+	  if (marker.readOnly) {
+	    seeReadOnlySpans()
+	    if (doc.history.done.length || doc.history.undone.length)
+	      { doc.clearHistory() }
+	  }
+	  if (marker.collapsed) {
+	    marker.id = ++nextMarkerId
+	    marker.atomic = true
+	  }
+	  if (cm) {
+	    // Sync editor state
+	    if (updateMaxLine) { cm.curOp.updateMaxLine = true }
+	    if (marker.collapsed)
+	      { regChange(cm, from.line, to.line + 1) }
+	    else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
+	      { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text") } }
+	    if (marker.atomic) { reCheckSelection(cm.doc) }
+	    signalLater(cm, "markerAdded", cm, marker)
+	  }
+	  return marker
+	}
+
+	// SHARED TEXTMARKERS
+
+	// A shared marker spans multiple linked documents. It is
+	// implemented as a meta-marker-object controlling multiple normal
+	// markers.
+	var SharedTextMarker = function(markers, primary) {
+	  var this$1 = this;
+
+	  this.markers = markers
+	  this.primary = primary
+	  for (var i = 0; i < markers.length; ++i)
+	    { markers[i].parent = this$1 }
+	};
+
+	SharedTextMarker.prototype.clear = function () {
+	    var this$1 = this;
+
+	  if (this.explicitlyCleared) { return }
+	  this.explicitlyCleared = true
+	  for (var i = 0; i < this.markers.length; ++i)
+	    { this$1.markers[i].clear() }
+	  signalLater(this, "clear")
+	};
+
+	SharedTextMarker.prototype.find = function (side, lineObj) {
+	  return this.primary.find(side, lineObj)
+	};
+	eventMixin(SharedTextMarker)
+
+	function markTextShared(doc, from, to, options, type) {
+	  options = copyObj(options)
+	  options.shared = false
+	  var markers = [markText(doc, from, to, options, type)], primary = markers[0]
+	  var widget = options.widgetNode
+	  linkedDocs(doc, function (doc) {
+	    if (widget) { options.widgetNode = widget.cloneNode(true) }
+	    markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
+	    for (var i = 0; i < doc.linked.length; ++i)
+	      { if (doc.linked[i].isParent) { return } }
+	    primary = lst(markers)
+	  })
+	  return new SharedTextMarker(markers, primary)
+	}
+
+	function findSharedMarkers(doc) {
+	  return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+	}
+
+	function copySharedMarkers(doc, markers) {
+	  for (var i = 0; i < markers.length; i++) {
+	    var marker = markers[i], pos = marker.find()
+	    var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
+	    if (cmp(mFrom, mTo)) {
+	      var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
+	      marker.markers.push(subMark)
+	      subMark.parent = marker
+	    }
+	  }
+	}
+
+	function detachSharedMarkers(markers) {
+	  var loop = function ( i ) {
+	    var marker = markers[i], linked = [marker.primary.doc]
+	    linkedDocs(marker.primary.doc, function (d) { return linked.push(d); })
+	    for (var j = 0; j < marker.markers.length; j++) {
+	      var subMarker = marker.markers[j]
+	      if (indexOf(linked, subMarker.doc) == -1) {
+	        subMarker.parent = null
+	        marker.markers.splice(j--, 1)
+	      }
+	    }
+	  };
+
+	  for (var i = 0; i < markers.length; i++) loop( i );
+	}
+
+	var nextDocId = 0
+	var Doc = function(text, mode, firstLine, lineSep, direction) {
+	  if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+	  if (firstLine == null) { firstLine = 0 }
+
+	  BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
+	  this.first = firstLine
+	  this.scrollTop = this.scrollLeft = 0
+	  this.cantEdit = false
+	  this.cleanGeneration = 1
+	  this.modeFrontier = this.highlightFrontier = firstLine
+	  var start = Pos(firstLine, 0)
+	  this.sel = simpleSelection(start)
+	  this.history = new History(null)
+	  this.id = ++nextDocId
+	  this.modeOption = mode
+	  this.lineSep = lineSep
+	  this.direction = (direction == "rtl") ? "rtl" : "ltr"
+	  this.extend = false
+
+	  if (typeof text == "string") { text = this.splitLines(text) }
+	  updateDoc(this, {from: start, to: start, text: text})
+	  setSelection(this, simpleSelection(start), sel_dontScroll)
+	}
+
+	Doc.prototype = createObj(BranchChunk.prototype, {
+	  constructor: Doc,
+	  // Iterate over the document. Supports two forms -- with only one
+	  // argument, it calls that for each line in the document. With
+	  // three, it iterates over the range given by the first two (with
+	  // the second being non-inclusive).
+	  iter: function(from, to, op) {
+	    if (op) { this.iterN(from - this.first, to - from, op) }
+	    else { this.iterN(this.first, this.first + this.size, from) }
+	  },
+
+	  // Non-public interface for adding and removing lines.
+	  insert: function(at, lines) {
+	    var height = 0
+	    for (var i = 0; i < lines.length; ++i) { height += lines[i].height }
+	    this.insertInner(at - this.first, lines, height)
+	  },
+	  remove: function(at, n) { this.removeInner(at - this.first, n) },
+
+	  // From here, the methods are part of the public interface. Most
+	  // are also available from CodeMirror (editor) instances.
+
+	  getValue: function(lineSep) {
+	    var lines = getLines(this, this.first, this.first + this.size)
+	    if (lineSep === false) { return lines }
+	    return lines.join(lineSep || this.lineSeparator())
+	  },
+	  setValue: docMethodOp(function(code) {
+	    var top = Pos(this.first, 0), last = this.first + this.size - 1
+	    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+	                      text: this.splitLines(code), origin: "setValue", full: true}, true)
+	    if (this.cm) { scrollToCoords(this.cm, 0, 0) }
+	    setSelection(this, simpleSelection(top), sel_dontScroll)
+	  }),
+	  replaceRange: function(code, from, to, origin) {
+	    from = clipPos(this, from)
+	    to = to ? clipPos(this, to) : from
+	    replaceRange(this, code, from, to, origin)
+	  },
+	  getRange: function(from, to, lineSep) {
+	    var lines = getBetween(this, clipPos(this, from), clipPos(this, to))
+	    if (lineSep === false) { return lines }
+	    return lines.join(lineSep || this.lineSeparator())
+	  },
+
+	  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+	  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+	  getLineNumber: function(line) {return lineNo(line)},
+
+	  getLineHandleVisualStart: function(line) {
+	    if (typeof line == "number") { line = getLine(this, line) }
+	    return visualLine(line)
+	  },
+
+	  lineCount: function() {return this.size},
+	  firstLine: function() {return this.first},
+	  lastLine: function() {return this.first + this.size - 1},
+
+	  clipPos: function(pos) {return clipPos(this, pos)},
+
+	  getCursor: function(start) {
+	    var range = this.sel.primary(), pos
+	    if (start == null || start == "head") { pos = range.head }
+	    else if (start == "anchor") { pos = range.anchor }
+	    else if (start == "end" || start == "to" || start === false) { pos = range.to() }
+	    else { pos = range.from() }
+	    return pos
+	  },
+	  listSelections: function() { return this.sel.ranges },
+	  somethingSelected: function() {return this.sel.somethingSelected()},
+
+	  setCursor: docMethodOp(function(line, ch, options) {
+	    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
+	  }),
+	  setSelection: docMethodOp(function(anchor, head, options) {
+	    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
+	  }),
+	  extendSelection: docMethodOp(function(head, other, options) {
+	    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
+	  }),
+	  extendSelections: docMethodOp(function(heads, options) {
+	    extendSelections(this, clipPosArray(this, heads), options)
+	  }),
+	  extendSelectionsBy: docMethodOp(function(f, options) {
+	    var heads = map(this.sel.ranges, f)
+	    extendSelections(this, clipPosArray(this, heads), options)
+	  }),
+	  setSelections: docMethodOp(function(ranges, primary, options) {
+	    var this$1 = this;
+
+	    if (!ranges.length) { return }
+	    var out = []
+	    for (var i = 0; i < ranges.length; i++)
+	      { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
+	                         clipPos(this$1, ranges[i].head)) }
+	    if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex) }
+	    setSelection(this, normalizeSelection(out, primary), options)
+	  }),
+	  addSelection: docMethodOp(function(anchor, head, options) {
+	    var ranges = this.sel.ranges.slice(0)
+	    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
+	    setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
+	  }),
+
+	  getSelection: function(lineSep) {
+	    var this$1 = this;
+
+	    var ranges = this.sel.ranges, lines
+	    for (var i = 0; i < ranges.length; i++) {
+	      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+	      lines = lines ? lines.concat(sel) : sel
+	    }
+	    if (lineSep === false) { return lines }
+	    else { return lines.join(lineSep || this.lineSeparator()) }
+	  },
+	  getSelections: function(lineSep) {
+	    var this$1 = this;
+
+	    var parts = [], ranges = this.sel.ranges
+	    for (var i = 0; i < ranges.length; i++) {
+	      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+	      if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()) }
+	      parts[i] = sel
+	    }
+	    return parts
+	  },
+	  replaceSelection: function(code, collapse, origin) {
+	    var dup = []
+	    for (var i = 0; i < this.sel.ranges.length; i++)
+	      { dup[i] = code }
+	    this.replaceSelections(dup, collapse, origin || "+input")
+	  },
+	  replaceSelections: docMethodOp(function(code, collapse, origin) {
+	    var this$1 = this;
+
+	    var changes = [], sel = this.sel
+	    for (var i = 0; i < sel.ranges.length; i++) {
+	      var range = sel.ranges[i]
+	      changes[i] = {from: range.from(), to: range.to(), text: this$1.splitLines(code[i]), origin: origin}
+	    }
+	    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
+	    for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+	      { makeChange(this$1, changes[i$1]) }
+	    if (newSel) { setSelectionReplaceHistory(this, newSel) }
+	    else if (this.cm) { ensureCursorVisible(this.cm) }
+	  }),
+	  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
+	  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
+	  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
+	  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),
+
+	  setExtending: function(val) {this.extend = val},
+	  getExtending: function() {return this.extend},
+
+	  historySize: function() {
+	    var hist = this.history, done = 0, undone = 0
+	    for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done } }
+	    for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone } }
+	    return {undo: done, redo: undone}
+	  },
+	  clearHistory: function() {this.history = new History(this.history.maxGeneration)},
+
+	  markClean: function() {
+	    this.cleanGeneration = this.changeGeneration(true)
+	  },
+	  changeGeneration: function(forceSplit) {
+	    if (forceSplit)
+	      { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null }
+	    return this.history.generation
+	  },
+	  isClean: function (gen) {
+	    return this.history.generation == (gen || this.cleanGeneration)
+	  },
+
+	  getHistory: function() {
+	    return {done: copyHistoryArray(this.history.done),
+	            undone: copyHistoryArray(this.history.undone)}
+	  },
+	  setHistory: function(histData) {
+	    var hist = this.history = new History(this.history.maxGeneration)
+	    hist.done = copyHistoryArray(histData.done.slice(0), null, true)
+	    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
+	  },
+
+	  setGutterMarker: docMethodOp(function(line, gutterID, value) {
+	    return changeLine(this, line, "gutter", function (line) {
+	      var markers = line.gutterMarkers || (line.gutterMarkers = {})
+	      markers[gutterID] = value
+	      if (!value && isEmpty(markers)) { line.gutterMarkers = null }
+	      return true
+	    })
+	  }),
+
+	  clearGutter: docMethodOp(function(gutterID) {
+	    var this$1 = this;
+
+	    this.iter(function (line) {
+	      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+	        changeLine(this$1, line, "gutter", function () {
+	          line.gutterMarkers[gutterID] = null
+	          if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null }
+	          return true
+	        })
+	      }
+	    })
+	  }),
+
+	  lineInfo: function(line) {
+	    var n
+	    if (typeof line == "number") {
+	      if (!isLine(this, line)) { return null }
+	      n = line
+	      line = getLine(this, line)
+	      if (!line) { return null }
+	    } else {
+	      n = lineNo(line)
+	      if (n == null) { return null }
+	    }
+	    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+	            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+	            widgets: line.widgets}
+	  },
+
+	  addLineClass: docMethodOp(function(handle, where, cls) {
+	    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+	      var prop = where == "text" ? "textClass"
+	               : where == "background" ? "bgClass"
+	               : where == "gutter" ? "gutterClass" : "wrapClass"
+	      if (!line[prop]) { line[prop] = cls }
+	      else if (classTest(cls).test(line[prop])) { return false }
+	      else { line[prop] += " " + cls }
+	      return true
+	    })
+	  }),
+	  removeLineClass: docMethodOp(function(handle, where, cls) {
+	    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+	      var prop = where == "text" ? "textClass"
+	               : where == "background" ? "bgClass"
+	               : where == "gutter" ? "gutterClass" : "wrapClass"
+	      var cur = line[prop]
+	      if (!cur) { return false }
+	      else if (cls == null) { line[prop] = null }
+	      else {
+	        var found = cur.match(classTest(cls))
+	        if (!found) { return false }
+	        var end = found.index + found[0].length
+	        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null
+	      }
+	      return true
+	    })
+	  }),
+
+	  addLineWidget: docMethodOp(function(handle, node, options) {
+	    return addLineWidget(this, handle, node, options)
+	  }),
+	  removeLineWidget: function(widget) { widget.clear() },
+
+	  markText: function(from, to, options) {
+	    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+	  },
+	  setBookmark: function(pos, options) {
+	    var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+	                    insertLeft: options && options.insertLeft,
+	                    clearWhenEmpty: false, shared: options && options.shared,
+	                    handleMouseEvents: options && options.handleMouseEvents}
+	    pos = clipPos(this, pos)
+	    return markText(this, pos, pos, realOpts, "bookmark")
+	  },
+	  findMarksAt: function(pos) {
+	    pos = clipPos(this, pos)
+	    var markers = [], spans = getLine(this, pos.line).markedSpans
+	    if (spans) { for (var i = 0; i < spans.length; ++i) {
+	      var span = spans[i]
+	      if ((span.from == null || span.from <= pos.ch) &&
+	          (span.to == null || span.to >= pos.ch))
+	        { markers.push(span.marker.parent || span.marker) }
+	    } }
+	    return markers
+	  },
+	  findMarks: function(from, to, filter) {
+	    from = clipPos(this, from); to = clipPos(this, to)
+	    var found = [], lineNo = from.line
+	    this.iter(from.line, to.line + 1, function (line) {
+	      var spans = line.markedSpans
+	      if (spans) { for (var i = 0; i < spans.length; i++) {
+	        var span = spans[i]
+	        if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
+	              span.from == null && lineNo != from.line ||
+	              span.from != null && lineNo == to.line && span.from >= to.ch) &&
+	            (!filter || filter(span.marker)))
+	          { found.push(span.marker.parent || span.marker) }
+	      } }
+	      ++lineNo
+	    })
+	    return found
+	  },
+	  getAllMarks: function() {
+	    var markers = []
+	    this.iter(function (line) {
+	      var sps = line.markedSpans
+	      if (sps) { for (var i = 0; i < sps.length; ++i)
+	        { if (sps[i].from != null) { markers.push(sps[i].marker) } } }
+	    })
+	    return markers
+	  },
+
+	  posFromIndex: function(off) {
+	    var ch, lineNo = this.first, sepSize = this.lineSeparator().length
+	    this.iter(function (line) {
+	      var sz = line.text.length + sepSize
+	      if (sz > off) { ch = off; return true }
+	      off -= sz
+	      ++lineNo
+	    })
+	    return clipPos(this, Pos(lineNo, ch))
+	  },
+	  indexFromPos: function (coords) {
+	    coords = clipPos(this, coords)
+	    var index = coords.ch
+	    if (coords.line < this.first || coords.ch < 0) { return 0 }
+	    var sepSize = this.lineSeparator().length
+	    this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+	      index += line.text.length + sepSize
+	    })
+	    return index
+	  },
+
+	  copy: function(copyHistory) {
+	    var doc = new Doc(getLines(this, this.first, this.first + this.size),
+	                      this.modeOption, this.first, this.lineSep, this.direction)
+	    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
+	    doc.sel = this.sel
+	    doc.extend = false
+	    if (copyHistory) {
+	      doc.history.undoDepth = this.history.undoDepth
+	      doc.setHistory(this.getHistory())
+	    }
+	    return doc
+	  },
+
+	  linkedDoc: function(options) {
+	    if (!options) { options = {} }
+	    var from = this.first, to = this.first + this.size
+	    if (options.from != null && options.from > from) { from = options.from }
+	    if (options.to != null && options.to < to) { to = options.to }
+	    var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction)
+	    if (options.sharedHist) { copy.history = this.history
+	    ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
+	    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
+	    copySharedMarkers(copy, findSharedMarkers(this))
+	    return copy
+	  },
+	  unlinkDoc: function(other) {
+	    var this$1 = this;
+
+	    if (other instanceof CodeMirror) { other = other.doc }
+	    if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+	      var link = this$1.linked[i]
+	      if (link.doc != other) { continue }
+	      this$1.linked.splice(i, 1)
+	      other.unlinkDoc(this$1)
+	      detachSharedMarkers(findSharedMarkers(this$1))
+	      break
+	    } }
+	    // If the histories were shared, split them again
+	    if (other.history == this.history) {
+	      var splitIds = [other.id]
+	      linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true)
+	      other.history = new History(null)
+	      other.history.done = copyHistoryArray(this.history.done, splitIds)
+	      other.history.undone = copyHistoryArray(this.history.undone, splitIds)
+	    }
+	  },
+	  iterLinkedDocs: function(f) {linkedDocs(this, f)},
+
+	  getMode: function() {return this.mode},
+	  getEditor: function() {return this.cm},
+
+	  splitLines: function(str) {
+	    if (this.lineSep) { return str.split(this.lineSep) }
+	    return splitLinesAuto(str)
+	  },
+	  lineSeparator: function() { return this.lineSep || "\n" },
+
+	  setDirection: docMethodOp(function (dir) {
+	    if (dir != "rtl") { dir = "ltr" }
+	    if (dir == this.direction) { return }
+	    this.direction = dir
+	    this.iter(function (line) { return line.order = null; })
+	    if (this.cm) { directionChanged(this.cm) }
+	  })
+	})
+
+	// Public alias.
+	Doc.prototype.eachLine = Doc.prototype.iter
+
+	// Kludge to work around strange IE behavior where it'll sometimes
+	// re-fire a series of drag-related events right after the drop (#1551)
+	var lastDrop = 0
+
+	function onDrop(e) {
+	  var cm = this
+	  clearDragCursor(cm)
+	  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+	    { return }
+	  e_preventDefault(e)
+	  if (ie) { lastDrop = +new Date }
+	  var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
+	  if (!pos || cm.isReadOnly()) { return }
+	  // Might be a file drop, in which case we simply extract the text
+	  // and insert it.
+	  if (files && files.length && window.FileReader && window.File) {
+	    var n = files.length, text = Array(n), read = 0
+	    var loadFile = function (file, i) {
+	      if (cm.options.allowDropFileTypes &&
+	          indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+	        { return }
+
+	      var reader = new FileReader
+	      reader.onload = operation(cm, function () {
+	        var content = reader.result
+	        if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = "" }
+	        text[i] = content
+	        if (++read == n) {
+	          pos = clipPos(cm.doc, pos)
+	          var change = {from: pos, to: pos,
+	                        text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+	                        origin: "paste"}
+	          makeChange(cm.doc, change)
+	          setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)))
+	        }
+	      })
+	      reader.readAsText(file)
+	    }
+	    for (var i = 0; i < n; ++i) { loadFile(files[i], i) }
+	  } else { // Normal drop
+	    // Don't do a replace if the drop happened inside of the selected text.
+	    if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+	      cm.state.draggingText(e)
+	      // Ensure the editor is re-focused
+	      setTimeout(function () { return cm.display.input.focus(); }, 20)
+	      return
+	    }
 	    try {
-	      if (cm.isReadOnly()) cm.state.suppressEdits = true;
-	      if (dropShift) cm.display.shift = false;
-	      done = bound(cm) != Pass;
-	    } finally {
-	      cm.display.shift = prevShift;
-	      cm.state.suppressEdits = false;
-	    }
-	    return done;
-	  }
-
-	  function lookupKeyForEditor(cm, name, handle) {
-	    for (var i = 0; i < cm.state.keyMaps.length; i++) {
-	      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
-	      if (result) return result;
-	    }
-	    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
-	      || lookupKey(name, cm.options.keyMap, handle, cm);
-	  }
-
-	  var stopSeq = new Delayed;
-	  function dispatchKey(cm, name, e, handle) {
-	    var seq = cm.state.keySeq;
-	    if (seq) {
-	      if (isModifierKey(name)) return "handled";
-	      stopSeq.set(50, function() {
-	        if (cm.state.keySeq == seq) {
-	          cm.state.keySeq = null;
-	          cm.display.input.reset();
-	        }
-	      });
-	      name = seq + " " + name;
-	    }
-	    var result = lookupKeyForEditor(cm, name, handle);
-
-	    if (result == "multi")
-	      cm.state.keySeq = name;
-	    if (result == "handled")
-	      signalLater(cm, "keyHandled", cm, name, e);
-
-	    if (result == "handled" || result == "multi") {
-	      e_preventDefault(e);
-	      restartBlink(cm);
-	    }
-
-	    if (seq && !result && /\'$/.test(name)) {
-	      e_preventDefault(e);
-	      return true;
-	    }
-	    return !!result;
-	  }
-
-	  // Handle a key from the keydown event.
-	  function handleKeyBinding(cm, e) {
-	    var name = keyName(e, true);
-	    if (!name) return false;
-
-	    if (e.shiftKey && !cm.state.keySeq) {
-	      // First try to resolve full name (including 'Shift-'). Failing
-	      // that, see if there is a cursor-motion command (starting with
-	      // 'go') bound to the keyname without 'Shift-'.
-	      return dispatchKey(cm, "Shift-" + name, e, function(b) {return doHandleBinding(cm, b, true);})
-	          || dispatchKey(cm, name, e, function(b) {
-	               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
-	                 return doHandleBinding(cm, b);
-	             });
-	    } else {
-	      return dispatchKey(cm, name, e, function(b) { return doHandleBinding(cm, b); });
-	    }
-	  }
-
-	  // Handle a key from the keypress event
-	  function handleCharBinding(cm, e, ch) {
-	    return dispatchKey(cm, "'" + ch + "'", e,
-	                       function(b) { return doHandleBinding(cm, b, true); });
-	  }
-
-	  var lastStoppedKey = null;
-	  function onKeyDown(e) {
-	    var cm = this;
-	    cm.curOp.focus = activeElt();
-	    if (signalDOMEvent(cm, e)) return;
-	    // IE does strange things with escape.
-	    if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false;
-	    var code = e.keyCode;
-	    cm.display.shift = code == 16 || e.shiftKey;
-	    var handled = handleKeyBinding(cm, e);
+	      var text$1 = e.dataTransfer.getData("Text")
+	      if (text$1) {
+	        var selected
+	        if (cm.state.draggingText && !cm.state.draggingText.copy)
+	          { selected = cm.listSelections() }
+	        setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
+	        if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+	          { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag") } }
+	        cm.replaceSelection(text$1, "around", "paste")
+	        cm.display.input.focus()
+	      }
+	    }
+	    catch(e){}
+	  }
+	}
+
+	function onDragStart(cm, e) {
+	  if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+	  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+	  e.dataTransfer.setData("Text", cm.getSelection())
+	  e.dataTransfer.effectAllowed = "copyMove"
+
+	  // Use dummy image instead of default browsers image.
+	  // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+	  if (e.dataTransfer.setDragImage && !safari) {
+	    var img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
+	    img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
 	    if (presto) {
-	      lastStoppedKey = handled ? code : null;
-	      // Opera has no cut event... we try to at least catch the key combo
-	      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
-	        cm.replaceSelection("", null, "cut");
-	    }
-
-	    // Turn mouse into crosshair when Alt is held on Mac.
-	    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
-	      showCrossHair(cm);
-	  }
-
-	  function showCrossHair(cm) {
-	    var lineDiv = cm.display.lineDiv;
-	    addClass(lineDiv, "CodeMirror-crosshair");
-
-	    function up(e) {
-	      if (e.keyCode == 18 || !e.altKey) {
-	        rmClass(lineDiv, "CodeMirror-crosshair");
-	        off(document, "keyup", up);
-	        off(document, "mouseover", up);
-	      }
-	    }
-	    on(document, "keyup", up);
-	    on(document, "mouseover", up);
-	  }
-
-	  function onKeyUp(e) {
-	    if (e.keyCode == 16) this.doc.sel.shift = false;
-	    signalDOMEvent(this, e);
-	  }
-
-	  function onKeyPress(e) {
-	    var cm = this;
-	    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return;
-	    var keyCode = e.keyCode, charCode = e.charCode;
-	    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
-	    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) return;
-	    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
-	    if (handleCharBinding(cm, e, ch)) return;
-	    cm.display.input.onKeyPress(e);
-	  }
-
-	  // FOCUS/BLUR EVENTS
-
-	  function delayBlurEvent(cm) {
-	    cm.state.delayingBlurEvent = true;
-	    setTimeout(function() {
-	      if (cm.state.delayingBlurEvent) {
-	        cm.state.delayingBlurEvent = false;
-	        onBlur(cm);
-	      }
-	    }, 100);
-	  }
-
-	  function onFocus(cm) {
-	    if (cm.state.delayingBlurEvent) cm.state.delayingBlurEvent = false;
-
-	    if (cm.options.readOnly == "nocursor") return;
-	    if (!cm.state.focused) {
-	      signal(cm, "focus", cm);
-	      cm.state.focused = true;
-	      addClass(cm.display.wrapper, "CodeMirror-focused");
-	      // This test prevents this from firing when a context
-	      // menu is closed (since the input reset would kill the
-	      // select-all detection hack)
-	      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
-	        cm.display.input.reset();
-	        if (webkit) setTimeout(function() { cm.display.input.reset(true); }, 20); // Issue #1730
-	      }
-	      cm.display.input.receivedFocus();
-	    }
-	    restartBlink(cm);
-	  }
-	  function onBlur(cm) {
-	    if (cm.state.delayingBlurEvent) return;
-
-	    if (cm.state.focused) {
-	      signal(cm, "blur", cm);
-	      cm.state.focused = false;
-	      rmClass(cm.display.wrapper, "CodeMirror-focused");
-	    }
-	    clearInterval(cm.display.blinker);
-	    setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150);
-	  }
-
-	  // CONTEXT MENU HANDLING
-
-	  // To make the context menu work, we need to briefly unhide the
-	  // textarea (making it as unobtrusive as possible) to let the
-	  // right-click take effect on it.
-	  function onContextMenu(cm, e) {
-	    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return;
-	    if (signalDOMEvent(cm, e, "contextmenu")) return;
-	    cm.display.input.onContextMenu(e);
-	  }
-
-	  function contextMenuInGutter(cm, e) {
-	    if (!hasHandler(cm, "gutterContextMenu")) return false;
-	    return gutterEvent(cm, e, "gutterContextMenu", false);
-	  }
-
-	  // UPDATING
-
-	  // Compute the position of the end of a change (its 'to' property
-	  // refers to the pre-change end).
-	  var changeEnd = CodeMirror.changeEnd = function(change) {
-	    if (!change.text) return change.to;
-	    return Pos(change.from.line + change.text.length - 1,
-	               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
-	  };
-
-	  // Adjust a position to refer to the post-change position of the
-	  // same text, or the end of the change if the change covers it.
-	  function adjustForChange(pos, change) {
-	    if (cmp(pos, change.from) < 0) return pos;
-	    if (cmp(pos, change.to) <= 0) return changeEnd(change);
-
-	    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
-	    if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch;
-	    return Pos(line, ch);
-	  }
-
-	  function computeSelAfterChange(doc, change) {
-	    var out = [];
-	    for (var i = 0; i < doc.sel.ranges.length; i++) {
-	      var range = doc.sel.ranges[i];
-	      out.push(new Range(adjustForChange(range.anchor, change),
-	                         adjustForChange(range.head, change)));
-	    }
-	    return normalizeSelection(out, doc.sel.primIndex);
-	  }
-
-	  function offsetPos(pos, old, nw) {
-	    if (pos.line == old.line)
-	      return Pos(nw.line, pos.ch - old.ch + nw.ch);
-	    else
-	      return Pos(nw.line + (pos.line - old.line), pos.ch);
-	  }
-
-	  // Used by replaceSelections to allow moving the selection to the
-	  // start or around the replaced test. Hint may be "start" or "around".
-	  function computeReplacedSel(doc, changes, hint) {
-	    var out = [];
-	    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
-	    for (var i = 0; i < changes.length; i++) {
-	      var change = changes[i];
-	      var from = offsetPos(change.from, oldPrev, newPrev);
-	      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
-	      oldPrev = change.to;
-	      newPrev = to;
-	      if (hint == "around") {
-	        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
-	        out[i] = new Range(inv ? to : from, inv ? from : to);
-	      } else {
-	        out[i] = new Range(from, from);
-	      }
-	    }
-	    return new Selection(out, doc.sel.primIndex);
-	  }
-
-	  // Allow "beforeChange" event handlers to influence a change
-	  function filterChange(doc, change, update) {
-	    var obj = {
-	      canceled: false,
-	      from: change.from,
-	      to: change.to,
-	      text: change.text,
-	      origin: change.origin,
-	      cancel: function() { this.canceled = true; }
-	    };
-	    if (update) obj.update = function(from, to, text, origin) {
-	      if (from) this.from = clipPos(doc, from);
-	      if (to) this.to = clipPos(doc, to);
-	      if (text) this.text = text;
-	      if (origin !== undefined) this.origin = origin;
-	    };
-	    signal(doc, "beforeChange", doc, obj);
-	    if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
-
-	    if (obj.canceled) return null;
-	    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
-	  }
-
-	  // Apply a change to a document, and add it to the document's
-	  // history, and propagating it to all linked documents.
-	  function makeChange(doc, change, ignoreReadOnly) {
-	    if (doc.cm) {
-	      if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly);
-	      if (doc.cm.state.suppressEdits) return;
-	    }
-
-	    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
-	      change = filterChange(doc, change, true);
-	      if (!change) return;
-	    }
-
-	    // Possibly split or suppress the update based on the presence
-	    // of read-only spans in its range.
-	    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
-	    if (split) {
-	      for (var i = split.length - 1; i >= 0; --i)
-	        makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text});
+	      img.width = img.height = 1
+	      cm.display.wrapper.appendChild(img)
+	      // Force a relayout, or Opera won't use our image for some obscure reason
+	      img._top = img.offsetTop
+	    }
+	    e.dataTransfer.setDragImage(img, 0, 0)
+	    if (presto) { img.parentNode.removeChild(img) }
+	  }
+	}
+
+	function onDragOver(cm, e) {
+	  var pos = posFromMouse(cm, e)
+	  if (!pos) { return }
+	  var frag = document.createDocumentFragment()
+	  drawSelectionCursor(cm, pos, frag)
+	  if (!cm.display.dragCursor) {
+	    cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
+	    cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
+	  }
+	  removeChildrenAndAdd(cm.display.dragCursor, frag)
+	}
+
+	function clearDragCursor(cm) {
+	  if (cm.display.dragCursor) {
+	    cm.display.lineSpace.removeChild(cm.display.dragCursor)
+	    cm.display.dragCursor = null
+	  }
+	}
+
+	// These must be handled carefully, because naively registering a
+	// handler for each editor will cause the editors to never be
+	// garbage collected.
+
+	function forEachCodeMirror(f) {
+	  if (!document.getElementsByClassName) { return }
+	  var byClass = document.getElementsByClassName("CodeMirror")
+	  for (var i = 0; i < byClass.length; i++) {
+	    var cm = byClass[i].CodeMirror
+	    if (cm) { f(cm) }
+	  }
+	}
+
+	var globalsRegistered = false
+	function ensureGlobalHandlers() {
+	  if (globalsRegistered) { return }
+	  registerGlobalHandlers()
+	  globalsRegistered = true
+	}
+	function registerGlobalHandlers() {
+	  // When the window resizes, we need to refresh active editors.
+	  var resizeTimer
+	  on(window, "resize", function () {
+	    if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+	      resizeTimer = null
+	      forEachCodeMirror(onResize)
+	    }, 100) }
+	  })
+	  // When the window loses focus, we want to show the editor as blurred
+	  on(window, "blur", function () { return forEachCodeMirror(onBlur); })
+	}
+	// Called when the window resizes
+	function onResize(cm) {
+	  var d = cm.display
+	  if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
+	    { return }
+	  // Might be a text scaling operation, clear size caches.
+	  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+	  d.scrollbarsClipped = false
+	  cm.setSize()
+	}
+
+	var keyNames = {
+	  3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+	  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+	  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+	  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+	  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+	  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+	  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+	  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+	}
+
+	// Number keys
+	for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i) }
+	// Alphabetic keys
+	for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1) }
+	// Function keys
+	for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2 }
+
+	var keyMap = {}
+
+	keyMap.basic = {
+	  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+	  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+	  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+	  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+	  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+	  "Esc": "singleSelection"
+	}
+	// Note that the save and find-related commands aren't defined by
+	// default. User code or addons can define them. Unknown commands
+	// are simply ignored.
+	keyMap.pcDefault = {
+	  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+	  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+	  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+	  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+	  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+	  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+	  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+	  fallthrough: "basic"
+	}
+	// Very basic readline/emacs-style bindings, which are standard on Mac.
+	keyMap.emacsy = {
+	  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+	  "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+	  "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+	  "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+	  "Ctrl-O": "openLine"
+	}
+	keyMap.macDefault = {
+	  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+	  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+	  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+	  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+	  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+	  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+	  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+	  fallthrough: ["basic", "emacsy"]
+	}
+	keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault
+
+	// KEYMAP DISPATCH
+
+	function normalizeKeyName(name) {
+	  var parts = name.split(/-(?!$)/)
+	  name = parts[parts.length - 1]
+	  var alt, ctrl, shift, cmd
+	  for (var i = 0; i < parts.length - 1; i++) {
+	    var mod = parts[i]
+	    if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true }
+	    else if (/^a(lt)?$/i.test(mod)) { alt = true }
+	    else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true }
+	    else if (/^s(hift)?$/i.test(mod)) { shift = true }
+	    else { throw new Error("Unrecognized modifier name: " + mod) }
+	  }
+	  if (alt) { name = "Alt-" + name }
+	  if (ctrl) { name = "Ctrl-" + name }
+	  if (cmd) { name = "Cmd-" + name }
+	  if (shift) { name = "Shift-" + name }
+	  return name
+	}
+
+	// This is a kludge to keep keymaps mostly working as raw objects
+	// (backwards compatibility) while at the same time support features
+	// like normalization and multi-stroke key bindings. It compiles a
+	// new normalized keymap, and then updates the old object to reflect
+	// this.
+	function normalizeKeyMap(keymap) {
+	  var copy = {}
+	  for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+	    var value = keymap[keyname]
+	    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+	    if (value == "...") { delete keymap[keyname]; continue }
+
+	    var keys = map(keyname.split(" "), normalizeKeyName)
+	    for (var i = 0; i < keys.length; i++) {
+	      var val = (void 0), name = (void 0)
+	      if (i == keys.length - 1) {
+	        name = keys.join(" ")
+	        val = value
+	      } else {
+	        name = keys.slice(0, i + 1).join(" ")
+	        val = "..."
+	      }
+	      var prev = copy[name]
+	      if (!prev) { copy[name] = val }
+	      else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+	    }
+	    delete keymap[keyname]
+	  } }
+	  for (var prop in copy) { keymap[prop] = copy[prop] }
+	  return keymap
+	}
+
+	function lookupKey(key, map, handle, context) {
+	  map = getKeyMap(map)
+	  var found = map.call ? map.call(key, context) : map[key]
+	  if (found === false) { return "nothing" }
+	  if (found === "...") { return "multi" }
+	  if (found != null && handle(found)) { return "handled" }
+
+	  if (map.fallthrough) {
+	    if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+	      { return lookupKey(key, map.fallthrough, handle, context) }
+	    for (var i = 0; i < map.fallthrough.length; i++) {
+	      var result = lookupKey(key, map.fallthrough[i], handle, context)
+	      if (result) { return result }
+	    }
+	  }
+	}
+
+	// Modifier key presses don't count as 'real' key presses for the
+	// purpose of keymap fallthrough.
+	function isModifierKey(value) {
+	  var name = typeof value == "string" ? value : keyNames[value.keyCode]
+	  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+	}
+
+	function addModifierNames(name, event, noShift) {
+	  var base = name
+	  if (event.altKey && base != "Alt") { name = "Alt-" + name }
+	  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name }
+	  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name }
+	  if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name }
+	  return name
+	}
+
+	// Look up the name of a key as indicated by an event object.
+	function keyName(event, noShift) {
+	  if (presto && event.keyCode == 34 && event["char"]) { return false }
+	  var name = keyNames[event.keyCode]
+	  if (name == null || event.altGraphKey) { return false }
+	  return addModifierNames(name, event, noShift)
+	}
+
+	function getKeyMap(val) {
+	  return typeof val == "string" ? keyMap[val] : val
+	}
+
+	// Helper for deleting text near the selection(s), used to implement
+	// backspace, delete, and similar functionality.
+	function deleteNearSelection(cm, compute) {
+	  var ranges = cm.doc.sel.ranges, kill = []
+	  // Build up a set of ranges to kill first, merging overlapping
+	  // ranges.
+	  for (var i = 0; i < ranges.length; i++) {
+	    var toKill = compute(ranges[i])
+	    while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+	      var replaced = kill.pop()
+	      if (cmp(replaced.from, toKill.from) < 0) {
+	        toKill.from = replaced.from
+	        break
+	      }
+	    }
+	    kill.push(toKill)
+	  }
+	  // Next, remove those actual ranges.
+	  runInOp(cm, function () {
+	    for (var i = kill.length - 1; i >= 0; i--)
+	      { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") }
+	    ensureCursorVisible(cm)
+	  })
+	}
+
+	// Commands are parameter-less actions that can be performed on an
+	// editor, mostly used for keybindings.
+	var commands = {
+	  selectAll: selectAll,
+	  singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+	  killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+	    if (range.empty()) {
+	      var len = getLine(cm.doc, range.head.line).text.length
+	      if (range.head.ch == len && range.head.line < cm.lastLine())
+	        { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+	      else
+	        { return {from: range.head, to: Pos(range.head.line, len)} }
 	    } else {
-	      makeChangeInner(doc, change);
-	    }
-	  }
-
-	  function makeChangeInner(doc, change) {
-	    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) return;
-	    var selAfter = computeSelAfterChange(doc, change);
-	    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
-
-	    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
-	    var rebased = [];
-
-	    linkedDocs(doc, function(doc, sharedHist) {
-	      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-	        rebaseHist(doc.history, change);
-	        rebased.push(doc.history);
-	      }
-	      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
-	    });
-	  }
-
-	  // Revert a change stored in a document's history.
-	  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
-	    if (doc.cm && doc.cm.state.suppressEdits) return;
-
-	    var hist = doc.history, event, selAfter = doc.sel;
-	    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
-
-	    // Verify that there is a useable event (so that ctrl-z won't
-	    // needlessly clear selection events)
-	    for (var i = 0; i < source.length; i++) {
-	      event = source[i];
-	      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
-	        break;
-	    }
-	    if (i == source.length) return;
-	    hist.lastOrigin = hist.lastSelOrigin = null;
-
-	    for (;;) {
-	      event = source.pop();
-	      if (event.ranges) {
-	        pushSelectionToHistory(event, dest);
-	        if (allowSelectionOnly && !event.equals(doc.sel)) {
-	          setSelection(doc, event, {clearRedo: false});
-	          return;
-	        }
-	        selAfter = event;
-	      }
-	      else break;
-	    }
-
-	    // Build up a reverse change object to add to the opposite history
-	    // stack (redo when undoing, and vice versa).
-	    var antiChanges = [];
-	    pushSelectionToHistory(selAfter, dest);
-	    dest.push({changes: antiChanges, generation: hist.generation});
-	    hist.generation = event.generation || ++hist.maxGeneration;
-
-	    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
-
-	    for (var i = event.changes.length - 1; i >= 0; --i) {
-	      var change = event.changes[i];
-	      change.origin = type;
-	      if (filter && !filterChange(doc, change, false)) {
-	        source.length = 0;
-	        return;
-	      }
-
-	      antiChanges.push(historyChangeFromChange(doc, change));
-
-	      var after = i ? computeSelAfterChange(doc, change) : lst(source);
-	      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
-	      if (!i && doc.cm) doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)});
-	      var rebased = [];
-
-	      // Propagate to the linked documents
-	      linkedDocs(doc, function(doc, sharedHist) {
-	        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-	          rebaseHist(doc.history, change);
-	          rebased.push(doc.history);
-	        }
-	        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
-	      });
-	    }
-	  }
-
-	  // Sub-views need their line numbers shifted when text is added
-	  // above or below them in the parent document.
-	  function shiftDoc(doc, distance) {
-	    if (distance == 0) return;
-	    doc.first += distance;
-	    doc.sel = new Selection(map(doc.sel.ranges, function(range) {
-	      return new Range(Pos(range.anchor.line + distance, range.anchor.ch),
-	                       Pos(range.head.line + distance, range.head.ch));
-	    }), doc.sel.primIndex);
-	    if (doc.cm) {
-	      regChange(doc.cm, doc.first, doc.first - distance, distance);
-	      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
-	        regLineChange(doc.cm, l, "gutter");
-	    }
-	  }
-
-	  // More lower-level change function, handling only a single document
-	  // (not linked ones).
-	  function makeChangeSingleDoc(doc, change, selAfter, spans) {
-	    if (doc.cm && !doc.cm.curOp)
-	      return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
-
-	    if (change.to.line < doc.first) {
-	      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
-	      return;
-	    }
-	    if (change.from.line > doc.lastLine()) return;
-
-	    // Clip the change to the size of this doc
-	    if (change.from.line < doc.first) {
-	      var shift = change.text.length - 1 - (doc.first - change.from.line);
-	      shiftDoc(doc, shift);
-	      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
-	                text: [lst(change.text)], origin: change.origin};
-	    }
-	    var last = doc.lastLine();
-	    if (change.to.line > last) {
-	      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
-	                text: [change.text[0]], origin: change.origin};
-	    }
-
-	    change.removed = getBetween(doc, change.from, change.to);
-
-	    if (!selAfter) selAfter = computeSelAfterChange(doc, change);
-	    if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
-	    else updateDoc(doc, change, spans);
-	    setSelectionNoUndo(doc, selAfter, sel_dontScroll);
-	  }
-
-	  // Handle the interaction of a change to a document with the editor
-	  // that this document is part of.
-	  function makeChangeSingleDocInEditor(cm, change, spans) {
-	    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
-
-	    var recomputeMaxLength = false, checkWidthStart = from.line;
-	    if (!cm.options.lineWrapping) {
-	      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
-	      doc.iter(checkWidthStart, to.line + 1, function(line) {
-	        if (line == display.maxLine) {
-	          recomputeMaxLength = true;
-	          return true;
-	        }
-	      });
-	    }
-
-	    if (doc.sel.contains(change.from, change.to) > -1)
-	      signalCursorActivity(cm);
-
-	    updateDoc(doc, change, spans, estimateHeight(cm));
-
-	    if (!cm.options.lineWrapping) {
-	      doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
-	        var len = lineLength(line);
-	        if (len > display.maxLineLength) {
-	          display.maxLine = line;
-	          display.maxLineLength = len;
-	          display.maxLineChanged = true;
-	          recomputeMaxLength = false;
-	        }
-	      });
-	      if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
-	    }
-
-	    // Adjust frontier, schedule worker
-	    doc.frontier = Math.min(doc.frontier, from.line);
-	    startWorker(cm, 400);
-
-	    var lendiff = change.text.length - (to.line - from.line) - 1;
-	    // Remember that these lines changed, for updating the display
-	    if (change.full)
-	      regChange(cm);
-	    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
-	      regLineChange(cm, from.line, "text");
+	      return {from: range.from(), to: range.to()}
+	    }
+	  }); },
+	  deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+	    from: Pos(range.from().line, 0),
+	    to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+	  }); }); },
+	  delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+	    from: Pos(range.from().line, 0), to: range.from()
+	  }); }); },
+	  delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+	    var top = cm.charCoords(range.head, "div").top + 5
+	    var leftPos = cm.coordsChar({left: 0, top: top}, "div")
+	    return {from: leftPos, to: range.from()}
+	  }); },
+	  delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+	    var top = cm.charCoords(range.head, "div").top + 5
+	    var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+	    return {from: range.from(), to: rightPos }
+	  }); },
+	  undo: function (cm) { return cm.undo(); },
+	  redo: function (cm) { return cm.redo(); },
+	  undoSelection: function (cm) { return cm.undoSelection(); },
+	  redoSelection: function (cm) { return cm.redoSelection(); },
+	  goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+	  goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+	  goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+	    {origin: "+move", bias: 1}
+	  ); },
+	  goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+	    {origin: "+move", bias: 1}
+	  ); },
+	  goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+	    {origin: "+move", bias: -1}
+	  ); },
+	  goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+	    var top = cm.charCoords(range.head, "div").top + 5
+	    return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+	  }, sel_move); },
+	  goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+	    var top = cm.charCoords(range.head, "div").top + 5
+	    return cm.coordsChar({left: 0, top: top}, "div")
+	  }, sel_move); },
+	  goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+	    var top = cm.charCoords(range.head, "div").top + 5
+	    var pos = cm.coordsChar({left: 0, top: top}, "div")
+	    if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+	    return pos
+	  }, sel_move); },
+	  goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+	  goLineDown: function (cm) { return cm.moveV(1, "line"); },
+	  goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+	  goPageDown: function (cm) { return cm.moveV(1, "page"); },
+	  goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+	  goCharRight: function (cm) { return cm.moveH(1, "char"); },
+	  goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+	  goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+	  goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+	  goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+	  goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+	  goWordRight: function (cm) { return cm.moveH(1, "word"); },
+	  delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
+	  delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+	  delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+	  delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+	  delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+	  delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+	  indentAuto: function (cm) { return cm.indentSelection("smart"); },
+	  indentMore: function (cm) { return cm.indentSelection("add"); },
+	  indentLess: function (cm) { return cm.indentSelection("subtract"); },
+	  insertTab: function (cm) { return cm.replaceSelection("\t"); },
+	  insertSoftTab: function (cm) {
+	    var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize
+	    for (var i = 0; i < ranges.length; i++) {
+	      var pos = ranges[i].from()
+	      var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize)
+	      spaces.push(spaceStr(tabSize - col % tabSize))
+	    }
+	    cm.replaceSelections(spaces)
+	  },
+	  defaultTab: function (cm) {
+	    if (cm.somethingSelected()) { cm.indentSelection("add") }
+	    else { cm.execCommand("insertTab") }
+	  },
+	  // Swap the two chars left and right of each selection's head.
+	  // Move cursor behind the two swapped characters afterwards.
+	  //
+	  // Doesn't consider line feeds a character.
+	  // Doesn't scan more than one line above to find a character.
+	  // Doesn't do anything on an empty line.
+	  // Doesn't do anything with non-empty selections.
+	  transposeChars: function (cm) { return runInOp(cm, function () {
+	    var ranges = cm.listSelections(), newSel = []
+	    for (var i = 0; i < ranges.length; i++) {
+	      if (!ranges[i].empty()) { continue }
+	      var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text
+	      if (line) {
+	        if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1) }
+	        if (cur.ch > 0) {
+	          cur = new Pos(cur.line, cur.ch + 1)
+	          cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+	                          Pos(cur.line, cur.ch - 2), cur, "+transpose")
+	        } else if (cur.line > cm.doc.first) {
+	          var prev = getLine(cm.doc, cur.line - 1).text
+	          if (prev) {
+	            cur = new Pos(cur.line, 1)
+	            cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+	                            prev.charAt(prev.length - 1),
+	                            Pos(cur.line - 1, prev.length - 1), cur, "+transpose")
+	          }
+	        }
+	      }
+	      newSel.push(new Range(cur, cur))
+	    }
+	    cm.setSelections(newSel)
+	  }); },
+	  newlineAndIndent: function (cm) { return runInOp(cm, function () {
+	    var sels = cm.listSelections()
+	    for (var i = sels.length - 1; i >= 0; i--)
+	      { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input") }
+	    sels = cm.listSelections()
+	    for (var i$1 = 0; i$1 < sels.length; i$1++)
+	      { cm.indentLine(sels[i$1].from().line, null, true) }
+	    ensureCursorVisible(cm)
+	  }); },
+	  openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+	  toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+	}
+
+
+	function lineStart(cm, lineN) {
+	  var line = getLine(cm.doc, lineN)
+	  var visual = visualLine(line)
+	  if (visual != line) { lineN = lineNo(visual) }
+	  return endOfLine(true, cm, visual, lineN, 1)
+	}
+	function lineEnd(cm, lineN) {
+	  var line = getLine(cm.doc, lineN)
+	  var visual = visualLineEnd(line)
+	  if (visual != line) { lineN = lineNo(visual) }
+	  return endOfLine(true, cm, line, lineN, -1)
+	}
+	function lineStartSmart(cm, pos) {
+	  var start = lineStart(cm, pos.line)
+	  var line = getLine(cm.doc, start.line)
+	  var order = getOrder(line, cm.doc.direction)
+	  if (!order || order[0].level == 0) {
+	    var firstNonWS = Math.max(0, line.text.search(/\S/))
+	    var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch
+	    return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+	  }
+	  return start
+	}
+
+	// Run a handler that was bound to a key.
+	function doHandleBinding(cm, bound, dropShift) {
+	  if (typeof bound == "string") {
+	    bound = commands[bound]
+	    if (!bound) { return false }
+	  }
+	  // Ensure previous input has been read, so that the handler sees a
+	  // consistent view of the document
+	  cm.display.input.ensurePolled()
+	  var prevShift = cm.display.shift, done = false
+	  try {
+	    if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+	    if (dropShift) { cm.display.shift = false }
+	    done = bound(cm) != Pass
+	  } finally {
+	    cm.display.shift = prevShift
+	    cm.state.suppressEdits = false
+	  }
+	  return done
+	}
+
+	function lookupKeyForEditor(cm, name, handle) {
+	  for (var i = 0; i < cm.state.keyMaps.length; i++) {
+	    var result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
+	    if (result) { return result }
+	  }
+	  return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+	    || lookupKey(name, cm.options.keyMap, handle, cm)
+	}
+
+	// Note that, despite the name, this function is also used to check
+	// for bound mouse clicks.
+
+	var stopSeq = new Delayed
+	function dispatchKey(cm, name, e, handle) {
+	  var seq = cm.state.keySeq
+	  if (seq) {
+	    if (isModifierKey(name)) { return "handled" }
+	    stopSeq.set(50, function () {
+	      if (cm.state.keySeq == seq) {
+	        cm.state.keySeq = null
+	        cm.display.input.reset()
+	      }
+	    })
+	    name = seq + " " + name
+	  }
+	  var result = lookupKeyForEditor(cm, name, handle)
+
+	  if (result == "multi")
+	    { cm.state.keySeq = name }
+	  if (result == "handled")
+	    { signalLater(cm, "keyHandled", cm, name, e) }
+
+	  if (result == "handled" || result == "multi") {
+	    e_preventDefault(e)
+	    restartBlink(cm)
+	  }
+
+	  if (seq && !result && /\'$/.test(name)) {
+	    e_preventDefault(e)
+	    return true
+	  }
+	  return !!result
+	}
+
+	// Handle a key from the keydown event.
+	function handleKeyBinding(cm, e) {
+	  var name = keyName(e, true)
+	  if (!name) { return false }
+
+	  if (e.shiftKey && !cm.state.keySeq) {
+	    // First try to resolve full name (including 'Shift-'). Failing
+	    // that, see if there is a cursor-motion command (starting with
+	    // 'go') bound to the keyname without 'Shift-'.
+	    return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+	        || dispatchKey(cm, name, e, function (b) {
+	             if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+	               { return doHandleBinding(cm, b) }
+	           })
+	  } else {
+	    return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+	  }
+	}
+
+	// Handle a key from the keypress event
+	function handleCharBinding(cm, e, ch) {
+	  return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+	}
+
+	var lastStoppedKey = null
+	function onKeyDown(e) {
+	  var cm = this
+	  cm.curOp.focus = activeElt()
+	  if (signalDOMEvent(cm, e)) { return }
+	  // IE does strange things with escape.
+	  if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false }
+	  var code = e.keyCode
+	  cm.display.shift = code == 16 || e.shiftKey
+	  var handled = handleKeyBinding(cm, e)
+	  if (presto) {
+	    lastStoppedKey = handled ? code : null
+	    // Opera has no cut event... we try to at least catch the key combo
+	    if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+	      { cm.replaceSelection("", null, "cut") }
+	  }
+
+	  // Turn mouse into crosshair when Alt is held on Mac.
+	  if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+	    { showCrossHair(cm) }
+	}
+
+	function showCrossHair(cm) {
+	  var lineDiv = cm.display.lineDiv
+	  addClass(lineDiv, "CodeMirror-crosshair")
+
+	  function up(e) {
+	    if (e.keyCode == 18 || !e.altKey) {
+	      rmClass(lineDiv, "CodeMirror-crosshair")
+	      off(document, "keyup", up)
+	      off(document, "mouseover", up)
+	    }
+	  }
+	  on(document, "keyup", up)
+	  on(document, "mouseover", up)
+	}
+
+	function onKeyUp(e) {
+	  if (e.keyCode == 16) { this.doc.sel.shift = false }
+	  signalDOMEvent(this, e)
+	}
+
+	function onKeyPress(e) {
+	  var cm = this
+	  if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+	  var keyCode = e.keyCode, charCode = e.charCode
+	  if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+	  if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+	  var ch = String.fromCharCode(charCode == null ? keyCode : charCode)
+	  // Some browsers fire keypress events for backspace
+	  if (ch == "\x08") { return }
+	  if (handleCharBinding(cm, e, ch)) { return }
+	  cm.display.input.onKeyPress(e)
+	}
+
+	var DOUBLECLICK_DELAY = 400
+
+	var PastClick = function(time, pos, button) {
+	  this.time = time
+	  this.pos = pos
+	  this.button = button
+	};
+
+	PastClick.prototype.compare = function (time, pos, button) {
+	  return this.time + DOUBLECLICK_DELAY > time &&
+	    cmp(pos, this.pos) == 0 && button == this.button
+	};
+
+	var lastClick;
+	var lastDoubleClick;
+	function clickRepeat(pos, button) {
+	  var now = +new Date
+	  if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+	    lastClick = lastDoubleClick = null
+	    return "triple"
+	  } else if (lastClick && lastClick.compare(now, pos, button)) {
+	    lastDoubleClick = new PastClick(now, pos, button)
+	    lastClick = null
+	    return "double"
+	  } else {
+	    lastClick = new PastClick(now, pos, button)
+	    lastDoubleClick = null
+	    return "single"
+	  }
+	}
+
+	// A mouse down can be a single click, double click, triple click,
+	// start of selection drag, start of text drag, new cursor
+	// (ctrl-click), rectangle drag (alt-drag), or xwin
+	// middle-click-paste. Or it might be a click on something we should
+	// not interfere with, such as a scrollbar or widget.
+	function onMouseDown(e) {
+	  var cm = this, display = cm.display
+	  if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+	  display.input.ensurePolled()
+	  display.shift = e.shiftKey
+
+	  if (eventInWidget(display, e)) {
+	    if (!webkit) {
+	      // Briefly turn off draggability, to allow widgets to do
+	      // normal dragging things.
+	      display.scroller.draggable = false
+	      setTimeout(function () { return display.scroller.draggable = true; }, 100)
+	    }
+	    return
+	  }
+	  if (clickInGutter(cm, e)) { return }
+	  var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single"
+	  window.focus()
+
+	  // #3261: make sure, that we're not starting a second selection
+	  if (button == 1 && cm.state.selectingText)
+	    { cm.state.selectingText(e) }
+
+	  if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+	  if (button == 1) {
+	    if (pos) { leftButtonDown(cm, pos, repeat, e) }
+	    else if (e_target(e) == display.scroller) { e_preventDefault(e) }
+	  } else if (button == 2) {
+	    if (pos) { extendSelection(cm.doc, pos) }
+	    setTimeout(function () { return display.input.focus(); }, 20)
+	  } else if (button == 3) {
+	    if (captureRightClick) { onContextMenu(cm, e) }
+	    else { delayBlurEvent(cm) }
+	  }
+	}
+
+	function handleMappedButton(cm, button, pos, repeat, event) {
+	  var name = "Click"
+	  if (repeat == "double") { name = "Double" + name }
+	  else if (repeat == "triple") { name = "Triple" + name }
+	  name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name
+
+	  return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+	    if (typeof bound == "string") { bound = commands[bound] }
+	    if (!bound) { return false }
+	    var done = false
+	    try {
+	      if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+	      done = bound(cm, pos) != Pass
+	    } finally {
+	      cm.state.suppressEdits = false
+	    }
+	    return done
+	  })
+	}
+
+	function configureMouse(cm, repeat, event) {
+	  var option = cm.getOption("configureMouse")
+	  var value = option ? option(cm, repeat, event) : {}
+	  if (value.unit == null) {
+	    var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey
+	    value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line"
+	  }
+	  if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey }
+	  if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey }
+	  if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey) }
+	  return value
+	}
+
+	function leftButtonDown(cm, pos, repeat, event) {
+	  if (ie) { setTimeout(bind(ensureFocus, cm), 0) }
+	  else { cm.curOp.focus = activeElt() }
+
+	  var behavior = configureMouse(cm, repeat, event)
+
+	  var sel = cm.doc.sel, contained
+	  if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+	      repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+	      (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+	      (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+	    { leftButtonStartDrag(cm, event, pos, behavior) }
+	  else
+	    { leftButtonSelect(cm, event, pos, behavior) }
+	}
+
+	// Start a text drag. When it ends, see if any dragging actually
+	// happen, and treat as a click if it didn't.
+	function leftButtonStartDrag(cm, event, pos, behavior) {
+	  var display = cm.display, moved = false
+	  var dragEnd = operation(cm, function (e) {
+	    if (webkit) { display.scroller.draggable = false }
+	    cm.state.draggingText = false
+	    off(document, "mouseup", dragEnd)
+	    off(document, "mousemove", mouseMove)
+	    off(display.scroller, "dragstart", dragStart)
+	    off(display.scroller, "drop", dragEnd)
+	    if (!moved) {
+	      e_preventDefault(e)
+	      if (!behavior.addNew)
+	        { extendSelection(cm.doc, pos, null, null, behavior.extend) }
+	      // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+	      if (webkit || ie && ie_version == 9)
+	        { setTimeout(function () {document.body.focus(); display.input.focus()}, 20) }
+	      else
+	        { display.input.focus() }
+	    }
+	  })
+	  var mouseMove = function(e2) {
+	    moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10
+	  }
+	  var dragStart = function () { return moved = true; }
+	  // Let the drag handler handle this.
+	  if (webkit) { display.scroller.draggable = true }
+	  cm.state.draggingText = dragEnd
+	  dragEnd.copy = !behavior.moveOnDrag
+	  // IE's approach to draggable
+	  if (display.scroller.dragDrop) { display.scroller.dragDrop() }
+	  on(document, "mouseup", dragEnd)
+	  on(document, "mousemove", mouseMove)
+	  on(display.scroller, "dragstart", dragStart)
+	  on(display.scroller, "drop", dragEnd)
+
+	  delayBlurEvent(cm)
+	  setTimeout(function () { return display.input.focus(); }, 20)
+	}
+
+	function rangeForUnit(cm, pos, unit) {
+	  if (unit == "char") { return new Range(pos, pos) }
+	  if (unit == "word") { return cm.findWordAt(pos) }
+	  if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+	  var result = unit(cm, pos)
+	  return new Range(result.from, result.to)
+	}
+
+	// Normal selection, as opposed to text dragging.
+	function leftButtonSelect(cm, event, start, behavior) {
+	  var display = cm.display, doc = cm.doc
+	  e_preventDefault(event)
+
+	  var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
+	  if (behavior.addNew && !behavior.extend) {
+	    ourIndex = doc.sel.contains(start)
+	    if (ourIndex > -1)
+	      { ourRange = ranges[ourIndex] }
+	    else
+	      { ourRange = new Range(start, start) }
+	  } else {
+	    ourRange = doc.sel.primary()
+	    ourIndex = doc.sel.primIndex
+	  }
+
+	  if (behavior.unit == "rectangle") {
+	    if (!behavior.addNew) { ourRange = new Range(start, start) }
+	    start = posFromMouse(cm, event, true, true)
+	    ourIndex = -1
+	  } else {
+	    var range = rangeForUnit(cm, start, behavior.unit)
+	    if (behavior.extend)
+	      { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend) }
 	    else
-	      regChange(cm, from.line, to.line + 1, lendiff);
-
-	    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
-	    if (changeHandler || changesHandler) {
-	      var obj = {
-	        from: from, to: to,
-	        text: change.text,
-	        removed: change.removed,
-	        origin: change.origin
-	      };
-	      if (changeHandler) signalLater(cm, "change", cm, obj);
-	      if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj);
-	    }
-	    cm.display.selForContextMenu = null;
-	  }
-
-	  function replaceRange(doc, code, from, to, origin) {
-	    if (!to) to = from;
-	    if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
-	    if (typeof code == "string") code = doc.splitLines(code);
-	    makeChange(doc, {from: from, to: to, text: code, origin: origin});
-	  }
-
-	  // SCROLLING THINGS INTO VIEW
-
-	  // If an editor sits on the top or bottom of the window, partially
-	  // scrolled out of view, this ensures that the cursor is visible.
-	  function maybeScrollWindow(cm, coords) {
-	    if (signalDOMEvent(cm, "scrollCursorIntoView")) return;
-
-	    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
-	    if (coords.top + box.top < 0) doScroll = true;
-	    else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
-	    if (doScroll != null && !phantom) {
-	      var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
-	                           (coords.top - display.viewOffset - paddingTop(cm.display)) + "px; height: " +
-	                           (coords.bottom - coords.top + scrollGap(cm) + display.barHeight) + "px; left: " +
-	                           coords.left + "px; width: 2px;");
-	      cm.display.lineSpace.appendChild(scrollNode);
-	      scrollNode.scrollIntoView(doScroll);
-	      cm.display.lineSpace.removeChild(scrollNode);
-	    }
-	  }
-
-	  // Scroll a given position into view (immediately), verifying that
-	  // it actually became visible (as line heights are accurately
-	  // measured, the position of something may 'drift' during drawing).
-	  function scrollPosIntoView(cm, pos, end, margin) {
-	    if (margin == null) margin = 0;
-	    for (var limit = 0; limit < 5; limit++) {
-	      var changed = false, coords = cursorCoords(cm, pos);
-	      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
-	      var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
-	                                         Math.min(coords.top, endCoords.top) - margin,
-	                                         Math.max(coords.left, endCoords.left),
-	                                         Math.max(coords.bottom, endCoords.bottom) + margin);
-	      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
-	      if (scrollPos.scrollTop != null) {
-	        setScrollTop(cm, scrollPos.scrollTop);
-	        if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
-	      }
-	      if (scrollPos.scrollLeft != null) {
-	        setScrollLeft(cm, scrollPos.scrollLeft);
-	        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
-	      }
-	      if (!changed) break;
-	    }
-	    return coords;
-	  }
-
-	  // Scroll a given set of coordinates into view (immediately).
-	  function scrollIntoView(cm, x1, y1, x2, y2) {
-	    var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
-	    if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
-	    if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
-	  }
-
-	  // Calculate a new scroll position needed to scroll the given
-	  // rectangle into view. Returns an object with scrollTop and
-	  // scrollLeft properties. When these are undefined, the
-	  // vertical/horizontal position does not need to be adjusted.
-	  function calculateScrollPos(cm, x1, y1, x2, y2) {
-	    var display = cm.display, snapMargin = textHeight(cm.display);
-	    if (y1 < 0) y1 = 0;
-	    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
-	    var screen = displayHeight(cm), result = {};
-	    if (y2 - y1 > screen) y2 = y1 + screen;
-	    var docBottom = cm.doc.height + paddingVert(display);
-	    var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
-	    if (y1 < screentop) {
-	      result.scrollTop = atTop ? 0 : y1;
-	    } else if (y2 > screentop + screen) {
-	      var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
-	      if (newTop != screentop) result.scrollTop = newTop;
-	    }
-
-	    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
-	    var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
-	    var tooWide = x2 - x1 > screenw;
-	    if (tooWide) x2 = x1 + screenw;
-	    if (x1 < 10)
-	      result.scrollLeft = 0;
-	    else if (x1 < screenleft)
-	      result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10));
-	    else if (x2 > screenw + screenleft - 3)
-	      result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw;
-	    return result;
-	  }
-
-	  // Store a relative adjustment to the scroll position in the current
-	  // operation (to be applied when the operation finishes).
-	  function addToScrollPos(cm, left, top) {
-	    if (left != null || top != null) resolveScrollToPos(cm);
-	    if (left != null)
-	      cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left;
-	    if (top != null)
-	      cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
-	  }
-
-	  // Make sure that at the end of the operation the current cursor is
-	  // shown.
-	  function ensureCursorVisible(cm) {
-	    resolveScrollToPos(cm);
-	    var cur = cm.getCursor(), from = cur, to = cur;
-	    if (!cm.options.lineWrapping) {
-	      from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur;
-	      to = Pos(cur.line, cur.ch + 1);
-	    }
-	    cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true};
-	  }
-
-	  // When an operation has its scrollToPos property set, and another
-	  // scroll action is applied before the end of the operation, this
-	  // 'simulates' scrolling that position into view in a cheap way, so
-	  // that the effect of intermediate scroll commands is not ignored.
-	  function resolveScrollToPos(cm) {
-	    var range = cm.curOp.scrollToPos;
-	    if (range) {
-	      cm.curOp.scrollToPos = null;
-	      var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
-	      var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
-	                                    Math.min(from.top, to.top) - range.margin,
-	                                    Math.max(from.right, to.right),
-	                                    Math.max(from.bottom, to.bottom) + range.margin);
-	      cm.scrollTo(sPos.scrollLeft, sPos.scrollTop);
-	    }
-	  }
-
-	  // API UTILITIES
-
-	  // Indent the given line. The how parameter can be "smart",
-	  // "add"/null, "subtract", or "prev". When aggressive is false
-	  // (typically set to true for forced single-line indents), empty
-	  // lines are not indented, and places where the mode returns Pass
-	  // are left alone.
-	  function indentLine(cm, n, how, aggressive) {
-	    var doc = cm.doc, state;
-	    if (how == null) how = "add";
-	    if (how == "smart") {
-	      // Fall back to "prev" when the mode doesn't have an indentation
-	      // method.
-	      if (!doc.mode.indent) how = "prev";
-	      else state = getStateBefore(cm, n);
-	    }
-
-	    var tabSize = cm.options.tabSize;
-	    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
-	    if (line.stateAfter) line.stateAfter = null;
-	    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
-	    if (!aggressive && !/\S/.test(line.text)) {
-	      indentation = 0;
-	      how = "not";
-	    } else if (how == "smart") {
-	      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
-	      if (indentation == Pass || indentation > 150) {
-	        if (!aggressive) return;
-	        how = "prev";
-	      }
-	    }
-	    if (how == "prev") {
-	      if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
-	      else indentation = 0;
-	    } else if (how == "add") {
-	      indentation = curSpace + cm.options.indentUnit;
-	    } else if (how == "subtract") {
-	      indentation = curSpace - cm.options.indentUnit;
-	    } else if (typeof how == "number") {
-	      indentation = curSpace + how;
-	    }
-	    indentation = Math.max(0, indentation);
-
-	    var indentString = "", pos = 0;
-	    if (cm.options.indentWithTabs)
-	      for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
-	    if (pos < indentation) indentString += spaceStr(indentation - pos);
-
-	    if (indentString != curSpaceString) {
-	      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
-	      line.stateAfter = null;
-	      return true;
+	      { ourRange = range }
+	  }
+
+	  if (!behavior.addNew) {
+	    ourIndex = 0
+	    setSelection(doc, new Selection([ourRange], 0), sel_mouse)
+	    startSel = doc.sel
+	  } else if (ourIndex == -1) {
+	    ourIndex = ranges.length
+	    setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
+	                 {scroll: false, origin: "*mouse"})
+	  } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+	    setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+	                 {scroll: false, origin: "*mouse"})
+	    startSel = doc.sel
+	  } else {
+	    replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)
+	  }
+
+	  var lastPos = start
+	  function extendTo(pos) {
+	    if (cmp(lastPos, pos) == 0) { return }
+	    lastPos = pos
+
+	    if (behavior.unit == "rectangle") {
+	      var ranges = [], tabSize = cm.options.tabSize
+	      var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
+	      var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
+	      var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
+	      for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+	           line <= end; line++) {
+	        var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
+	        if (left == right)
+	          { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))) }
+	        else if (text.length > leftPos)
+	          { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))) }
+	      }
+	      if (!ranges.length) { ranges.push(new Range(start, start)) }
+	      setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+	                   {origin: "*mouse", scroll: false})
+	      cm.scrollIntoView(pos)
+	    } else {
+	      var oldRange = ourRange
+	      var range = rangeForUnit(cm, pos, behavior.unit)
+	      var anchor = oldRange.anchor, head
+	      if (cmp(range.anchor, anchor) > 0) {
+	        head = range.head
+	        anchor = minPos(oldRange.from(), range.anchor)
+	      } else {
+	        head = range.anchor
+	        anchor = maxPos(oldRange.to(), range.head)
+	      }
+	      var ranges$1 = startSel.ranges.slice(0)
+	      ranges$1[ourIndex] = new Range(clipPos(doc, anchor), head)
+	      setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse)
+	    }
+	  }
+
+	  var editorSize = display.wrapper.getBoundingClientRect()
+	  // Used to ensure timeout re-tries don't fire when another extend
+	  // happened in the meantime (clearTimeout isn't reliable -- at
+	  // least on Chrome, the timeouts still happen even when cleared,
+	  // if the clear happens after their scheduled firing time).
+	  var counter = 0
+
+	  function extend(e) {
+	    var curCount = ++counter
+	    var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle")
+	    if (!cur) { return }
+	    if (cmp(cur, lastPos) != 0) {
+	      cm.curOp.focus = activeElt()
+	      extendTo(cur)
+	      var visible = visibleLines(display, doc)
+	      if (cur.line >= visible.to || cur.line < visible.from)
+	        { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e) }}), 150) }
 	    } else {
-	      // Ensure that, if the cursor was in the whitespace at the start
-	      // of the line, it is moved to the end of that space.
-	      for (var i = 0; i < doc.sel.ranges.length; i++) {
-	        var range = doc.sel.ranges[i];
-	        if (range.head.line == n && range.head.ch < curSpaceString.length) {
-	          var pos = Pos(n, curSpaceString.length);
-	          replaceOneSelection(doc, i, new Range(pos, pos));
-	          break;
-	        }
-	      }
-	    }
-	  }
-
-	  // Utility for applying a change to a line by handle or number,
-	  // returning the number and optionally registering the line as
-	  // changed.
-	  function changeLine(doc, handle, changeType, op) {
-	    var no = handle, line = handle;
-	    if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
-	    else no = lineNo(handle);
-	    if (no == null) return null;
-	    if (op(line, no) && doc.cm) regLineChange(doc.cm, no, changeType);
-	    return line;
-	  }
-
-	  // Helper for deleting text near the selection(s), used to implement
-	  // backspace, delete, and similar functionality.
-	  function deleteNearSelection(cm, compute) {
-	    var ranges = cm.doc.sel.ranges, kill = [];
-	    // Build up a set of ranges to kill first, merging overlapping
-	    // ranges.
-	    for (var i = 0; i < ranges.length; i++) {
-	      var toKill = compute(ranges[i]);
-	      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
-	        var replaced = kill.pop();
-	        if (cmp(replaced.from, toKill.from) < 0) {
-	          toKill.from = replaced.from;
-	          break;
-	        }
-	      }
-	      kill.push(toKill);
-	    }
-	    // Next, remove those actual ranges.
-	    runInOp(cm, function() {
-	      for (var i = kill.length - 1; i >= 0; i--)
-	        replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete");
-	      ensureCursorVisible(cm);
-	    });
-	  }
-
-	  // Used for horizontal relative motion. Dir is -1 or 1 (left or
-	  // right), unit can be "char", "column" (like char, but doesn't
-	  // cross line boundaries), "word" (across next word), or "group" (to
-	  // the start of next group of word or non-word-non-whitespace
-	  // chars). The visually param controls whether, in right-to-left
-	  // text, direction 1 means to move towards the next index in the
-	  // string, or towards the character to the right of the current
-	  // position. The resulting position will have a hitSide=true
-	  // property if it reached the end of the document.
-	  function findPosH(doc, pos, dir, unit, visually) {
-	    var line = pos.line, ch = pos.ch, origDir = dir;
-	    var lineObj = getLine(doc, line);
-	    function findNextLine() {
-	      var l = line + dir;
-	      if (l < doc.first || l >= doc.first + doc.size) return false
-	      line = l;
-	      return lineObj = getLine(doc, l);
-	    }
-	    function moveOnce(boundToLine) {
-	      var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
-	      if (next == null) {
-	        if (!boundToLine && findNextLine()) {
-	          if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
-	          else ch = dir < 0 ? lineObj.text.length : 0;
-	        } else return false
-	      } else ch = next;
-	      return true;
-	    }
-
-	    if (unit == "char") {
-	      moveOnce()
-	    } else if (unit == "column") {
-	      moveOnce(true)
-	    } else if (unit == "word" || unit == "group") {
-	      var sawType = null, group = unit == "group";
-	      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
-	      for (var first = true;; first = false) {
-	        if (dir < 0 && !moveOnce(!first)) break;
-	        var cur = lineObj.text.charAt(ch) || "\n";
-	        var type = isWordChar(cur, helper) ? "w"
-	          : group && cur == "\n" ? "n"
-	          : !group || /\s/.test(cur) ? null
-	          : "p";
-	        if (group && !first && !type) type = "s";
-	        if (sawType && sawType != type) {
-	          if (dir < 0) {dir = 1; moveOnce();}
-	          break;
-	        }
-
-	        if (type) sawType = type;
-	        if (dir > 0 && !moveOnce(!first)) break;
-	      }
-	    }
-	    var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true);
-	    if (!cmp(pos, result)) result.hitSide = true;
-	    return result;
-	  }
-
-	  // For relative vertical movement. Dir may be -1 or 1. Unit can be
-	  // "page" or "line". The resulting position will have a hitSide=true
-	  // property if it reached the end of the document.
-	  function findPosV(cm, pos, dir, unit) {
-	    var doc = cm.doc, x = pos.left, y;
-	    if (unit == "page") {
-	      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
-	      y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
-	    } else if (unit == "line") {
-	      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
-	    }
-	    for (;;) {
-	      var target = coordsChar(cm, x, y);
-	      if (!target.outside) break;
-	      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
-	      y += dir * 5;
-	    }
-	    return target;
-	  }
-
-	  // EDITOR METHODS
-
-	  // The publicly visible API. Note that methodOp(f) means
-	  // 'wrap f in an operation, performed on its `this` parameter'.
-
-	  // This is not the complete set of editor methods. Most of the
-	  // methods defined on the Doc type are also injected into
-	  // CodeMirror.prototype, for backwards compatibility and
-	  // convenience.
+	      var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
+	      if (outside) { setTimeout(operation(cm, function () {
+	        if (counter != curCount) { return }
+	        display.scroller.scrollTop += outside
+	        extend(e)
+	      }), 50) }
+	    }
+	  }
+
+	  function done(e) {
+	    cm.state.selectingText = false
+	    counter = Infinity
+	    e_preventDefault(e)
+	    display.input.focus()
+	    off(document, "mousemove", move)
+	    off(document, "mouseup", up)
+	    doc.history.lastSelOrigin = null
+	  }
+
+	  var move = operation(cm, function (e) {
+	    if (!e_button(e)) { done(e) }
+	    else { extend(e) }
+	  })
+	  var up = operation(cm, done)
+	  cm.state.selectingText = up
+	  on(document, "mousemove", move)
+	  on(document, "mouseup", up)
+	}
+
+
+	// Determines whether an event happened in the gutter, and fires the
+	// handlers for the corresponding event.
+	function gutterEvent(cm, e, type, prevent) {
+	  var mX, mY
+	  try { mX = e.clientX; mY = e.clientY }
+	  catch(e) { return false }
+	  if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+	  if (prevent) { e_preventDefault(e) }
+
+	  var display = cm.display
+	  var lineBox = display.lineDiv.getBoundingClientRect()
+
+	  if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+	  mY -= lineBox.top - display.viewOffset
+
+	  for (var i = 0; i < cm.options.gutters.length; ++i) {
+	    var g = display.gutters.childNodes[i]
+	    if (g && g.getBoundingClientRect().right >= mX) {
+	      var line = lineAtHeight(cm.doc, mY)
+	      var gutter = cm.options.gutters[i]
+	      signal(cm, type, cm, line, gutter, e)
+	      return e_defaultPrevented(e)
+	    }
+	  }
+	}
+
+	function clickInGutter(cm, e) {
+	  return gutterEvent(cm, e, "gutterClick", true)
+	}
+
+	// CONTEXT MENU HANDLING
+
+	// To make the context menu work, we need to briefly unhide the
+	// textarea (making it as unobtrusive as possible) to let the
+	// right-click take effect on it.
+	function onContextMenu(cm, e) {
+	  if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+	  if (signalDOMEvent(cm, e, "contextmenu")) { return }
+	  cm.display.input.onContextMenu(e)
+	}
+
+	function contextMenuInGutter(cm, e) {
+	  if (!hasHandler(cm, "gutterContextMenu")) { return false }
+	  return gutterEvent(cm, e, "gutterContextMenu", false)
+	}
+
+	function themeChanged(cm) {
+	  cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+	    cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-")
+	  clearCaches(cm)
+	}
+
+	var Init = {toString: function(){return "CodeMirror.Init"}}
+
+	var defaults = {}
+	var optionHandlers = {}
+
+	function defineOptions(CodeMirror) {
+	  var optionHandlers = CodeMirror.optionHandlers
+
+	  function option(name, deflt, handle, notOnInit) {
+	    CodeMirror.defaults[name] = deflt
+	    if (handle) { optionHandlers[name] =
+	      notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old) }} : handle }
+	  }
+
+	  CodeMirror.defineOption = option
+
+	  // Passed to option handlers when there is no old value.
+	  CodeMirror.Init = Init
+
+	  // These two are, on init, called from the constructor because they
+	  // have to be initialized before the editor can start at all.
+	  option("value", "", function (cm, val) { return cm.setValue(val); }, true)
+	  option("mode", null, function (cm, val) {
+	    cm.doc.modeOption = val
+	    loadMode(cm)
+	  }, true)
+
+	  option("indentUnit", 2, loadMode, true)
+	  option("indentWithTabs", false)
+	  option("smartIndent", true)
+	  option("tabSize", 4, function (cm) {
+	    resetModeState(cm)
+	    clearCaches(cm)
+	    regChange(cm)
+	  }, true)
+	  option("lineSeparator", null, function (cm, val) {
+	    cm.doc.lineSep = val
+	    if (!val) { return }
+	    var newBreaks = [], lineNo = cm.doc.first
+	    cm.doc.iter(function (line) {
+	      for (var pos = 0;;) {
+	        var found = line.text.indexOf(val, pos)
+	        if (found == -1) { break }
+	        pos = found + val.length
+	        newBreaks.push(Pos(lineNo, found))
+	      }
+	      lineNo++
+	    })
+	    for (var i = newBreaks.length - 1; i >= 0; i--)
+	      { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }
+	  })
+	  option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
+	    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g")
+	    if (old != Init) { cm.refresh() }
+	  })
+	  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true)
+	  option("electricChars", true)
+	  option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+	    throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+	  }, true)
+	  option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true)
+	  option("rtlMoveVisually", !windows)
+	  option("wholeLineUpdateBefore", true)
+
+	  option("theme", "default", function (cm) {
+	    themeChanged(cm)
+	    guttersChanged(cm)
+	  }, true)
+	  option("keyMap", "default", function (cm, val, old) {
+	    var next = getKeyMap(val)
+	    var prev = old != Init && getKeyMap(old)
+	    if (prev && prev.detach) { prev.detach(cm, next) }
+	    if (next.attach) { next.attach(cm, prev || null) }
+	  })
+	  option("extraKeys", null)
+	  option("configureMouse", null)
+
+	  option("lineWrapping", false, wrappingChanged, true)
+	  option("gutters", [], function (cm) {
+	    setGuttersForLineNumbers(cm.options)
+	    guttersChanged(cm)
+	  }, true)
+	  option("fixedGutter", true, function (cm, val) {
+	    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"
+	    cm.refresh()
+	  }, true)
+	  option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true)
+	  option("scrollbarStyle", "native", function (cm) {
+	    initScrollbars(cm)
+	    updateScrollbars(cm)
+	    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop)
+	    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft)
+	  }, true)
+	  option("lineNumbers", false, function (cm) {
+	    setGuttersForLineNumbers(cm.options)
+	    guttersChanged(cm)
+	  }, true)
+	  option("firstLineNumber", 1, guttersChanged, true)
+	  option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true)
+	  option("showCursorWhenSelecting", false, updateSelection, true)
+
+	  option("resetSelectionOnContextMenu", true)
+	  option("lineWiseCopyCut", true)
+	  option("pasteLinesPerSelection", true)
+
+	  option("readOnly", false, function (cm, val) {
+	    if (val == "nocursor") {
+	      onBlur(cm)
+	      cm.display.input.blur()
+	    }
+	    cm.display.input.readOnlyChanged(val)
+	  })
+	  option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset() }}, true)
+	  option("dragDrop", true, dragDropChanged)
+	  option("allowDropFileTypes", null)
+
+	  option("cursorBlinkRate", 530)
+	  option("cursorScrollMargin", 0)
+	  option("cursorHeight", 1, updateSelection, true)
+	  option("singleCursorHeightPerLine", true, updateSelection, true)
+	  option("workTime", 100)
+	  option("workDelay", 100)
+	  option("flattenSpans", true, resetModeState, true)
+	  option("addModeClass", false, resetModeState, true)
+	  option("pollInterval", 100)
+	  option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; })
+	  option("historyEventDelay", 1250)
+	  option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true)
+	  option("maxHighlightLength", 10000, resetModeState, true)
+	  option("moveInputWithCursor", true, function (cm, val) {
+	    if (!val) { cm.display.input.resetPosition() }
+	  })
+
+	  option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; })
+	  option("autofocus", null)
+	  option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true)
+	}
+
+	function guttersChanged(cm) {
+	  updateGutters(cm)
+	  regChange(cm)
+	  alignHorizontally(cm)
+	}
+
+	function dragDropChanged(cm, value, old) {
+	  var wasOn = old && old != Init
+	  if (!value != !wasOn) {
+	    var funcs = cm.display.dragFunctions
+	    var toggle = value ? on : off
+	    toggle(cm.display.scroller, "dragstart", funcs.start)
+	    toggle(cm.display.scroller, "dragenter", funcs.enter)
+	    toggle(cm.display.scroller, "dragover", funcs.over)
+	    toggle(cm.display.scroller, "dragleave", funcs.leave)
+	    toggle(cm.display.scroller, "drop", funcs.drop)
+	  }
+	}
+
+	function wrappingChanged(cm) {
+	  if (cm.options.lineWrapping) {
+	    addClass(cm.display.wrapper, "CodeMirror-wrap")
+	    cm.display.sizer.style.minWidth = ""
+	    cm.display.sizerWidth = null
+	  } else {
+	    rmClass(cm.display.wrapper, "CodeMirror-wrap")
+	    findMaxLine(cm)
+	  }
+	  estimateLineHeights(cm)
+	  regChange(cm)
+	  clearCaches(cm)
+	  setTimeout(function () { return updateScrollbars(cm); }, 100)
+	}
+
+	// A CodeMirror instance represents an editor. This is the object
+	// that user code is usually dealing with.
+
+	function CodeMirror(place, options) {
+	  var this$1 = this;
+
+	  if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
+
+	  this.options = options = options ? copyObj(options) : {}
+	  // Determine effective options based on given values and defaults.
+	  copyObj(defaults, options, false)
+	  setGuttersForLineNumbers(options)
+
+	  var doc = options.value
+	  if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction) }
+	  this.doc = doc
+
+	  var input = new CodeMirror.inputStyles[options.inputStyle](this)
+	  var display = this.display = new Display(place, doc, input)
+	  display.wrapper.CodeMirror = this
+	  updateGutters(this)
+	  themeChanged(this)
+	  if (options.lineWrapping)
+	    { this.display.wrapper.className += " CodeMirror-wrap" }
+	  initScrollbars(this)
+
+	  this.state = {
+	    keyMaps: [],  // stores maps added by addKeyMap
+	    overlays: [], // highlighting overlays, as added by addOverlay
+	    modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+	    overwrite: false,
+	    delayingBlurEvent: false,
+	    focused: false,
+	    suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+	    pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+	    selectingText: false,
+	    draggingText: false,
+	    highlight: new Delayed(), // stores highlight worker timeout
+	    keySeq: null,  // Unfinished key sequence
+	    specialChars: null
+	  }
+
+	  if (options.autofocus && !mobile) { display.input.focus() }
+
+	  // Override magic textarea content restore that IE sometimes does
+	  // on our hidden textarea on reload
+	  if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20) }
+
+	  registerEventHandlers(this)
+	  ensureGlobalHandlers()
+
+	  startOperation(this)
+	  this.curOp.forceUpdate = true
+	  attachDoc(this, doc)
+
+	  if ((options.autofocus && !mobile) || this.hasFocus())
+	    { setTimeout(bind(onFocus, this), 20) }
+	  else
+	    { onBlur(this) }
+
+	  for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+	    { optionHandlers[opt](this$1, options[opt], Init) } }
+	  maybeUpdateLineNumberWidth(this)
+	  if (options.finishInit) { options.finishInit(this) }
+	  for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1) }
+	  endOperation(this)
+	  // Suppress optimizelegibility in Webkit, since it breaks text
+	  // measuring on line wrapping boundaries.
+	  if (webkit && options.lineWrapping &&
+	      getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+	    { display.lineDiv.style.textRendering = "auto" }
+	}
+
+	// The default configuration options.
+	CodeMirror.defaults = defaults
+	// Functions to run when options are changed.
+	CodeMirror.optionHandlers = optionHandlers
+
+	// Attach the necessary event handlers when initializing the editor
+	function registerEventHandlers(cm) {
+	  var d = cm.display
+	  on(d.scroller, "mousedown", operation(cm, onMouseDown))
+	  // Older IE's will not fire a second mousedown for a double click
+	  if (ie && ie_version < 11)
+	    { on(d.scroller, "dblclick", operation(cm, function (e) {
+	      if (signalDOMEvent(cm, e)) { return }
+	      var pos = posFromMouse(cm, e)
+	      if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+	      e_preventDefault(e)
+	      var word = cm.findWordAt(pos)
+	      extendSelection(cm.doc, word.anchor, word.head)
+	    })) }
+	  else
+	    { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }) }
+	  // Some browsers fire contextmenu *after* opening the menu, at
+	  // which point we can't mess with it anymore. Context menu is
+	  // handled in onMouseDown for these browsers.
+	  if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }) }
+
+	  // Used to suppress mouse event handling when a touch happens
+	  var touchFinished, prevTouch = {end: 0}
+	  function finishTouch() {
+	    if (d.activeTouch) {
+	      touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000)
+	      prevTouch = d.activeTouch
+	      prevTouch.end = +new Date
+	    }
+	  }
+	  function isMouseLikeTouchEvent(e) {
+	    if (e.touches.length != 1) { return false }
+	    var touch = e.touches[0]
+	    return touch.radiusX <= 1 && touch.radiusY <= 1
+	  }
+	  function farAway(touch, other) {
+	    if (other.left == null) { return true }
+	    var dx = other.left - touch.left, dy = other.top - touch.top
+	    return dx * dx + dy * dy > 20 * 20
+	  }
+	  on(d.scroller, "touchstart", function (e) {
+	    if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
+	      d.input.ensurePolled()
+	      clearTimeout(touchFinished)
+	      var now = +new Date
+	      d.activeTouch = {start: now, moved: false,
+	                       prev: now - prevTouch.end <= 300 ? prevTouch : null}
+	      if (e.touches.length == 1) {
+	        d.activeTouch.left = e.touches[0].pageX
+	        d.activeTouch.top = e.touches[0].pageY
+	      }
+	    }
+	  })
+	  on(d.scroller, "touchmove", function () {
+	    if (d.activeTouch) { d.activeTouch.moved = true }
+	  })
+	  on(d.scroller, "touchend", function (e) {
+	    var touch = d.activeTouch
+	    if (touch && !eventInWidget(d, e) && touch.left != null &&
+	        !touch.moved && new Date - touch.start < 300) {
+	      var pos = cm.coordsChar(d.activeTouch, "page"), range
+	      if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+	        { range = new Range(pos, pos) }
+	      else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+	        { range = cm.findWordAt(pos) }
+	      else // Triple tap
+	        { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+	      cm.setSelection(range.anchor, range.head)
+	      cm.focus()
+	      e_preventDefault(e)
+	    }
+	    finishTouch()
+	  })
+	  on(d.scroller, "touchcancel", finishTouch)
+
+	  // Sync scrolling between fake scrollbars and real scrollable
+	  // area, ensure viewport is updated when scrolling.
+	  on(d.scroller, "scroll", function () {
+	    if (d.scroller.clientHeight) {
+	      updateScrollTop(cm, d.scroller.scrollTop)
+	      setScrollLeft(cm, d.scroller.scrollLeft, true)
+	      signal(cm, "scroll", cm)
+	    }
+	  })
+
+	  // Listen to wheel events in order to try and update the viewport on time.
+	  on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); })
+	  on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); })
+
+	  // Prevent wrapper from ever scrolling
+	  on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; })
+
+	  d.dragFunctions = {
+	    enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e) }},
+	    over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
+	    start: function (e) { return onDragStart(cm, e); },
+	    drop: operation(cm, onDrop),
+	    leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}
+	  }
+
+	  var inp = d.input.getField()
+	  on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); })
+	  on(inp, "keydown", operation(cm, onKeyDown))
+	  on(inp, "keypress", operation(cm, onKeyPress))
+	  on(inp, "focus", function (e) { return onFocus(cm, e); })
+	  on(inp, "blur", function (e) { return onBlur(cm, e); })
+	}
+
+	var initHooks = []
+	CodeMirror.defineInitHook = function (f) { return initHooks.push(f); }
+
+	// Indent the given line. The how parameter can be "smart",
+	// "add"/null, "subtract", or "prev". When aggressive is false
+	// (typically set to true for forced single-line indents), empty
+	// lines are not indented, and places where the mode returns Pass
+	// are left alone.
+	function indentLine(cm, n, how, aggressive) {
+	  var doc = cm.doc, state
+	  if (how == null) { how = "add" }
+	  if (how == "smart") {
+	    // Fall back to "prev" when the mode doesn't have an indentation
+	    // method.
+	    if (!doc.mode.indent) { how = "prev" }
+	    else { state = getContextBefore(cm, n).state }
+	  }
+
+	  var tabSize = cm.options.tabSize
+	  var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
+	  if (line.stateAfter) { line.stateAfter = null }
+	  var curSpaceString = line.text.match(/^\s*/)[0], indentation
+	  if (!aggressive && !/\S/.test(line.text)) {
+	    indentation = 0
+	    how = "not"
+	  } else if (how == "smart") {
+	    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
+	    if (indentation == Pass || indentation > 150) {
+	      if (!aggressive) { return }
+	      how = "prev"
+	    }
+	  }
+	  if (how == "prev") {
+	    if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize) }
+	    else { indentation = 0 }
+	  } else if (how == "add") {
+	    indentation = curSpace + cm.options.indentUnit
+	  } else if (how == "subtract") {
+	    indentation = curSpace - cm.options.indentUnit
+	  } else if (typeof how == "number") {
+	    indentation = curSpace + how
+	  }
+	  indentation = Math.max(0, indentation)
+
+	  var indentString = "", pos = 0
+	  if (cm.options.indentWithTabs)
+	    { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"} }
+	  if (pos < indentation) { indentString += spaceStr(indentation - pos) }
+
+	  if (indentString != curSpaceString) {
+	    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
+	    line.stateAfter = null
+	    return true
+	  } else {
+	    // Ensure that, if the cursor was in the whitespace at the start
+	    // of the line, it is moved to the end of that space.
+	    for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+	      var range = doc.sel.ranges[i$1]
+	      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+	        var pos$1 = Pos(n, curSpaceString.length)
+	        replaceOneSelection(doc, i$1, new Range(pos$1, pos$1))
+	        break
+	      }
+	    }
+	  }
+	}
+
+	// This will be set to a {lineWise: bool, text: [string]} object, so
+	// that, when pasting, we know what kind of selections the copied
+	// text was made out of.
+	var lastCopied = null
+
+	function setLastCopied(newLastCopied) {
+	  lastCopied = newLastCopied
+	}
+
+	function applyTextInput(cm, inserted, deleted, sel, origin) {
+	  var doc = cm.doc
+	  cm.display.shift = false
+	  if (!sel) { sel = doc.sel }
+
+	  var paste = cm.state.pasteIncoming || origin == "paste"
+	  var textLines = splitLinesAuto(inserted), multiPaste = null
+	  // When pasing N lines into N selections, insert one line per selection
+	  if (paste && sel.ranges.length > 1) {
+	    if (lastCopied && lastCopied.text.join("\n") == inserted) {
+	      if (sel.ranges.length % lastCopied.text.length == 0) {
+	        multiPaste = []
+	        for (var i = 0; i < lastCopied.text.length; i++)
+	          { multiPaste.push(doc.splitLines(lastCopied.text[i])) }
+	      }
+	    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+	      multiPaste = map(textLines, function (l) { return [l]; })
+	    }
+	  }
+
+	  var updateInput
+	  // Normal behavior is to insert the new text into every selection
+	  for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+	    var range = sel.ranges[i$1]
+	    var from = range.from(), to = range.to()
+	    if (range.empty()) {
+	      if (deleted && deleted > 0) // Handle deletion
+	        { from = Pos(from.line, from.ch - deleted) }
+	      else if (cm.state.overwrite && !paste) // Handle overwrite
+	        { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)) }
+	      else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+	        { from = to = Pos(from.line, 0) }
+	    }
+	    updateInput = cm.curOp.updateInput
+	    var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+	                       origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}
+	    makeChange(cm.doc, changeEvent)
+	    signalLater(cm, "inputRead", cm, changeEvent)
+	  }
+	  if (inserted && !paste)
+	    { triggerElectric(cm, inserted) }
+
+	  ensureCursorVisible(cm)
+	  cm.curOp.updateInput = updateInput
+	  cm.curOp.typing = true
+	  cm.state.pasteIncoming = cm.state.cutIncoming = false
+	}
+
+	function handlePaste(e, cm) {
+	  var pasted = e.clipboardData && e.clipboardData.getData("Text")
+	  if (pasted) {
+	    e.preventDefault()
+	    if (!cm.isReadOnly() && !cm.options.disableInput)
+	      { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }) }
+	    return true
+	  }
+	}
+
+	function triggerElectric(cm, inserted) {
+	  // When an 'electric' character is inserted, immediately trigger a reindent
+	  if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+	  var sel = cm.doc.sel
+
+	  for (var i = sel.ranges.length - 1; i >= 0; i--) {
+	    var range = sel.ranges[i]
+	    if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
+	    var mode = cm.getModeAt(range.head)
+	    var indented = false
+	    if (mode.electricChars) {
+	      for (var j = 0; j < mode.electricChars.length; j++)
+	        { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+	          indented = indentLine(cm, range.head.line, "smart")
+	          break
+	        } }
+	    } else if (mode.electricInput) {
+	      if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+	        { indented = indentLine(cm, range.head.line, "smart") }
+	    }
+	    if (indented) { signalLater(cm, "electricInput", cm, range.head.line) }
+	  }
+	}
+
+	function copyableRanges(cm) {
+	  var text = [], ranges = []
+	  for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+	    var line = cm.doc.sel.ranges[i].head.line
+	    var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
+	    ranges.push(lineRange)
+	    text.push(cm.getRange(lineRange.anchor, lineRange.head))
+	  }
+	  return {text: text, ranges: ranges}
+	}
+
+	function disableBrowserMagic(field, spellcheck) {
+	  field.setAttribute("autocorrect", "off")
+	  field.setAttribute("autocapitalize", "off")
+	  field.setAttribute("spellcheck", !!spellcheck)
+	}
+
+	function hiddenTextarea() {
+	  var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none")
+	  var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
+	  // The textarea is kept positioned near the cursor to prevent the
+	  // fact that it'll be scrolled into view on input from scrolling
+	  // our fake cursor out of view. On webkit, when wrap=off, paste is
+	  // very slow. So make the area wide instead.
+	  if (webkit) { te.style.width = "1000px" }
+	  else { te.setAttribute("wrap", "off") }
+	  // If border: 0; -- iOS fails to open keyboard (issue #1287)
+	  if (ios) { te.style.border = "1px solid black" }
+	  disableBrowserMagic(te)
+	  return div
+	}
+
+	// The publicly visible API. Note that methodOp(f) means
+	// 'wrap f in an operation, performed on its `this` parameter'.
+
+	// This is not the complete set of editor methods. Most of the
+	// methods defined on the Doc type are also injected into
+	// CodeMirror.prototype, for backwards compatibility and
+	// convenience.
+
+	function addEditorMethods(CodeMirror) {
+	  var optionHandlers = CodeMirror.optionHandlers
+
+	  var helpers = CodeMirror.helpers = {}
 
 	  CodeMirror.prototype = {
 	    constructor: CodeMirror,
-	    focus: function(){window.focus(); this.display.input.focus();},
+	    focus: function(){window.focus(); this.display.input.focus()},
 
 	    setOption: function(option, value) {
-	      var options = this.options, old = options[option];
-	      if (options[option] == value && option != "mode") return;
-	      options[option] = value;
+	      var options = this.options, old = options[option]
+	      if (options[option] == value && option != "mode") { return }
+	      options[option] = value
 	      if (optionHandlers.hasOwnProperty(option))
-	        operation(this, optionHandlers[option])(this, value, old);
-	    },
-
-	    getOption: function(option) {return this.options[option];},
-	    getDoc: function() {return this.doc;},
+	        { operation(this, optionHandlers[option])(this, value, old) }
+	      signal(this, "optionChange", this, option)
+	    },
+
+	    getOption: function(option) {return this.options[option]},
+	    getDoc: function() {return this.doc},
 
 	    addKeyMap: function(map, bottom) {
-	      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
+	      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map))
 	    },
 	    removeKeyMap: function(map) {
-	      var maps = this.state.keyMaps;
+	      var maps = this.state.keyMaps
 	      for (var i = 0; i < maps.length; ++i)
-	        if (maps[i] == map || maps[i].name == map) {
-	          maps.splice(i, 1);
-	          return true;
-	        }
+	        { if (maps[i] == map || maps[i].name == map) {
+	          maps.splice(i, 1)
+	          return true
+	        } }
 	    },
 
 	    addOverlay: methodOp(function(spec, options) {
-	      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
-	      if (mode.startState) throw new Error("Overlays may not be stateful.");
-	      this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
-	      this.state.modeGen++;
-	      regChange(this);
+	      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec)
+	      if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+	      insertSorted(this.state.overlays,
+	                   {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+	                    priority: (options && options.priority) || 0},
+	                   function (overlay) { return overlay.priority; })
+	      this.state.modeGen++
+	      regChange(this)
 	    }),
 	    removeOverlay: methodOp(function(spec) {
-	      var overlays = this.state.overlays;
+	      var this$1 = this;
+
+	      var overlays = this.state.overlays
 	      for (var i = 0; i < overlays.length; ++i) {
-	        var cur = overlays[i].modeSpec;
+	        var cur = overlays[i].modeSpec
 	        if (cur == spec || typeof spec == "string" && cur.name == spec) {
-	          overlays.splice(i, 1);
-	          this.state.modeGen++;
-	          regChange(this);
-	          return;
+	          overlays.splice(i, 1)
+	          this$1.state.modeGen++
+	          regChange(this$1)
+	          return
 	        }
 	      }
 	    }),
 
 	    indentLine: methodOp(function(n, dir, aggressive) {
 	      if (typeof dir != "string" && typeof dir != "number") {
-	        if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
-	        else dir = dir ? "add" : "subtract";
-	      }
-	      if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
+	        if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev" }
+	        else { dir = dir ? "add" : "subtract" }
+	      }
+	      if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive) }
 	    }),
 	    indentSelection: methodOp(function(how) {
-	      var ranges = this.doc.sel.ranges, end = -1;
+	      var this$1 = this;
+
+	      var ranges = this.doc.sel.ranges, end = -1
 	      for (var i = 0; i < ranges.length; i++) {
-	        var range = ranges[i];
+	        var range = ranges[i]
 	        if (!range.empty()) {
-	          var from = range.from(), to = range.to();
-	          var start = Math.max(end, from.line);
-	          end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+	          var from = range.from(), to = range.to()
+	          var start = Math.max(end, from.line)
+	          end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1
 	          for (var j = start; j < end; ++j)
-	            indentLine(this, j, how);
-	          var newRanges = this.doc.sel.ranges;
+	            { indentLine(this$1, j, how) }
+	          var newRanges = this$1.doc.sel.ranges
 	          if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
-	            replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll);
+	            { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll) }
 	        } else if (range.head.line > end) {
-	          indentLine(this, range.head.line, how, true);
-	          end = range.head.line;
-	          if (i == this.doc.sel.primIndex) ensureCursorVisible(this);
+	          indentLine(this$1, range.head.line, how, true)
+	          end = range.head.line
+	          if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1) }
 	        }
 	      }
 	    }),
 
 	    // Fetch the parser token for a given character. Useful for hacks
 	    // that want to inspect the mode state (say, for completion).
 	    getTokenAt: function(pos, precise) {
-	      return takeToken(this, pos, precise);
+	      return takeToken(this, pos, precise)
 	    },
 
 	    getLineTokens: function(line, precise) {
-	      return takeToken(this, Pos(line), precise, true);
+	      return takeToken(this, Pos(line), precise, true)
 	    },
 
 	    getTokenTypeAt: function(pos) {
-	      pos = clipPos(this.doc, pos);
-	      var styles = getLineStyles(this, getLine(this.doc, pos.line));
-	      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
-	      var type;
-	      if (ch == 0) type = styles[2];
-	      else for (;;) {
-	        var mid = (before + after) >> 1;
-	        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
-	        else if (styles[mid * 2 + 1] < ch) before = mid + 1;
-	        else { type = styles[mid * 2 + 2]; break; }
-	      }
-	      var cut = type ? type.indexOf("cm-overlay ") : -1;
-	      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1);
+	      pos = clipPos(this.doc, pos)
+	      var styles = getLineStyles(this, getLine(this.doc, pos.line))
+	      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch
+	      var type
+	      if (ch == 0) { type = styles[2] }
+	      else { for (;;) {
+	        var mid = (before + after) >> 1
+	        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid }
+	        else if (styles[mid * 2 + 1] < ch) { before = mid + 1 }
+	        else { type = styles[mid * 2 + 2]; break }
+	      } }
+	      var cut = type ? type.indexOf("overlay ") : -1
+	      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
 	    },
 
 	    getModeAt: function(pos) {
-	      var mode = this.doc.mode;
-	      if (!mode.innerMode) return mode;
-	      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
+	      var mode = this.doc.mode
+	      if (!mode.innerMode) { return mode }
+	      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
 	    },
 
 	    getHelper: function(pos, type) {
-	      return this.getHelpers(pos, type)[0];
+	      return this.getHelpers(pos, type)[0]
 	    },
 
 	    getHelpers: function(pos, type) {
-	      var found = [];
-	      if (!helpers.hasOwnProperty(type)) return found;
-	      var help = helpers[type], mode = this.getModeAt(pos);
+	      var this$1 = this;
+
+	      var found = []
+	      if (!helpers.hasOwnProperty(type)) { return found }
+	      var help = helpers[type], mode = this.getModeAt(pos)
 	      if (typeof mode[type] == "string") {
-	        if (help[mode[type]]) found.push(help[mode[type]]);
+	        if (help[mode[type]]) { found.push(help[mode[type]]) }
 	      } else if (mode[type]) {
 	        for (var i = 0; i < mode[type].length; i++) {
-	          var val = help[mode[type][i]];
-	          if (val) found.push(val);
+	          var val = help[mode[type][i]]
+	          if (val) { found.push(val) }
 	        }
 	      } else if (mode.helperType && help[mode.helperType]) {
-	        found.push(help[mode.helperType]);
+	        found.push(help[mode.helperType])
 	      } else if (help[mode.name]) {
-	        found.push(help[mode.name]);
-	      }
-	      for (var i = 0; i < help._global.length; i++) {
-	        var cur = help._global[i];
-	        if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
-	          found.push(cur.val);
-	      }
-	      return found;
+	        found.push(help[mode.name])
+	      }
+	      for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+	        var cur = help._global[i$1]
+	        if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
+	          { found.push(cur.val) }
+	      }
+	      return found
 	    },
 
 	    getStateAfter: function(line, precise) {
-	      var doc = this.doc;
-	      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
-	      return getStateBefore(this, line + 1, precise);
+	      var doc = this.doc
+	      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line)
+	      return getContextBefore(this, line + 1, precise).state
 	    },
 
 	    cursorCoords: function(start, mode) {
-	      var pos, range = this.doc.sel.primary();
-	      if (start == null) pos = range.head;
-	      else if (typeof start == "object") pos = clipPos(this.doc, start);
-	      else pos = start ? range.from() : range.to();
-	      return cursorCoords(this, pos, mode || "page");
+	      var pos, range = this.doc.sel.primary()
+	      if (start == null) { pos = range.head }
+	      else if (typeof start == "object") { pos = clipPos(this.doc, start) }
+	      else { pos = start ? range.from() : range.to() }
+	      return cursorCoords(this, pos, mode || "page")
 	    },
 
 	    charCoords: function(pos, mode) {
-	      return charCoords(this, clipPos(this.doc, pos), mode || "page");
+	      return charCoords(this, clipPos(this.doc, pos), mode || "page")
 	    },
 
 	    coordsChar: function(coords, mode) {
-	      coords = fromCoordSystem(this, coords, mode || "page");
-	      return coordsChar(this, coords.left, coords.top);
+	      coords = fromCoordSystem(this, coords, mode || "page")
+	      return coordsChar(this, coords.left, coords.top)
 	    },
 
 	    lineAtHeight: function(height, mode) {
-	      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
-	      return lineAtHeight(this.doc, height + this.display.viewOffset);
-	    },
-	    heightAtLine: function(line, mode) {
-	      var end = false, lineObj;
+	      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
+	      return lineAtHeight(this.doc, height + this.display.viewOffset)
+	    },
+	    heightAtLine: function(line, mode, includeWidgets) {
+	      var end = false, lineObj
 	      if (typeof line == "number") {
-	        var last = this.doc.first + this.doc.size - 1;
-	        if (line < this.doc.first) line = this.doc.first;
-	        else if (line > last) { line = last; end = true; }
-	        lineObj = getLine(this.doc, line);
-	      } else {
-	        lineObj = line;
-	      }
-	      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top +
-	        (end ? this.doc.height - heightAtLine(lineObj) : 0);
-	    },
-
-	    defaultTextHeight: function() { return textHeight(this.display); },
-	    defaultCharWidth: function() { return charWidth(this.display); },
-
-	    setGutterMarker: methodOp(function(line, gutterID, value) {
-	      return changeLine(this.doc, line, "gutter", function(line) {
-	        var markers = line.gutterMarkers || (line.gutterMarkers = {});
-	        markers[gutterID] = value;
-	        if (!value && isEmpty(markers)) line.gutterMarkers = null;
-	        return true;
-	      });
-	    }),
-
-	    clearGutter: methodOp(function(gutterID) {
-	      var cm = this, doc = cm.doc, i = doc.first;
-	      doc.iter(function(line) {
-	        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
-	          line.gutterMarkers[gutterID] = null;
-	          regLineChange(cm, i, "gutter");
-	          if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
-	        }
-	        ++i;
-	      });
-	    }),
-
-	    lineInfo: function(line) {
-	      if (typeof line == "number") {
-	        if (!isLine(this.doc, line)) return null;
-	        var n = line;
-	        line = getLine(this.doc, line);
-	        if (!line) return null;
-	      } else {
-	        var n = lineNo(line);
-	        if (n == null) return null;
-	      }
-	      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
-	              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
-	              widgets: line.widgets};
-	    },
-
-	    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};},
+	        var last = this.doc.first + this.doc.size - 1
+	        if (line < this.doc.first) { line = this.doc.first }
+	        else if (line > last) { line = last; end = true }
+	        lineObj = getLine(this.doc, line)
+	      } else {
+	        lineObj = line
+	      }
+	      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+	        (end ? this.doc.height - heightAtLine(lineObj) : 0)
+	    },
+
+	    defaultTextHeight: function() { return textHeight(this.display) },
+	    defaultCharWidth: function() { return charWidth(this.display) },
+
+	    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
 
 	    addWidget: function(pos, node, scroll, vert, horiz) {
-	      var display = this.display;
-	      pos = cursorCoords(this, clipPos(this.doc, pos));
-	      var top = pos.bottom, left = pos.left;
-	      node.style.position = "absolute";
-	      node.setAttribute("cm-ignore-events", "true");
-	      this.display.input.setUneditable(node);
-	      display.sizer.appendChild(node);
+	      var display = this.display
+	      pos = cursorCoords(this, clipPos(this.doc, pos))
+	      var top = pos.bottom, left = pos.left
+	      node.style.position = "absolute"
+	      node.setAttribute("cm-ignore-events", "true")
+	      this.display.input.setUneditable(node)
+	      display.sizer.appendChild(node)
 	      if (vert == "over") {
-	        top = pos.top;
+	        top = pos.top
 	      } else if (vert == "above" || vert == "near") {
 	        var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
-	        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+	        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth)
 	        // Default to positioning above (if specified and possible); otherwise default to positioning below
 	        if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
-	          top = pos.top - node.offsetHeight;
+	          { top = pos.top - node.offsetHeight }
 	        else if (pos.bottom + node.offsetHeight <= vspace)
-	          top = pos.bottom;
+	          { top = pos.bottom }
 	        if (left + node.offsetWidth > hspace)
-	          left = hspace - node.offsetWidth;
-	      }
-	      node.style.top = top + "px";
-	      node.style.left = node.style.right = "";
+	          { left = hspace - node.offsetWidth }
+	      }
+	      node.style.top = top + "px"
+	      node.style.left = node.style.right = ""
 	      if (horiz == "right") {
-	        left = display.sizer.clientWidth - node.offsetWidth;
-	        node.style.right = "0px";
-	      } else {
-	        if (horiz == "left") left = 0;
-	        else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
-	        node.style.left = left + "px";
+	        left = display.sizer.clientWidth - node.offsetWidth
+	        node.style.right = "0px"
+	      } else {
+	        if (horiz == "left") { left = 0 }
+	        else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2 }
+	        node.style.left = left + "px"
 	      }
 	      if (scroll)
-	        scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
+	        { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}) }
 	    },
 
 	    triggerOnKeyDown: methodOp(onKeyDown),
 	    triggerOnKeyPress: methodOp(onKeyPress),
 	    triggerOnKeyUp: onKeyUp,
+	    triggerOnMouseDown: methodOp(onMouseDown),
 
 	    execCommand: function(cmd) {
 	      if (commands.hasOwnProperty(cmd))
-	        return commands[cmd].call(null, this);
-	    },
-
-	    triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+	        { return commands[cmd].call(null, this) }
+	    },
+
+	    triggerElectric: methodOp(function(text) { triggerElectric(this, text) }),
 
 	    findPosH: function(from, amount, unit, visually) {
-	      var dir = 1;
-	      if (amount < 0) { dir = -1; amount = -amount; }
-	      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
-	        cur = findPosH(this.doc, cur, dir, unit, visually);
-	        if (cur.hitSide) break;
-	      }
-	      return cur;
+	      var this$1 = this;
+
+	      var dir = 1
+	      if (amount < 0) { dir = -1; amount = -amount }
+	      var cur = clipPos(this.doc, from)
+	      for (var i = 0; i < amount; ++i) {
+	        cur = findPosH(this$1.doc, cur, dir, unit, visually)
+	        if (cur.hitSide) { break }
+	      }
+	      return cur
 	    },
 
 	    moveH: methodOp(function(dir, unit) {
-	      var cm = this;
-	      cm.extendSelectionsBy(function(range) {
-	        if (cm.display.shift || cm.doc.extend || range.empty())
-	          return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisually);
+	      var this$1 = this;
+
+	      this.extendSelectionsBy(function (range) {
+	        if (this$1.display.shift || this$1.doc.extend || range.empty())
+	          { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
 	        else
-	          return dir < 0 ? range.from() : range.to();
-	      }, sel_move);
+	          { return dir < 0 ? range.from() : range.to() }
+	      }, sel_move)
 	    }),
 
 	    deleteH: methodOp(function(dir, unit) {
-	      var sel = this.doc.sel, doc = this.doc;
+	      var sel = this.doc.sel, doc = this.doc
 	      if (sel.somethingSelected())
-	        doc.replaceSelection("", null, "+delete");
+	        { doc.replaceSelection("", null, "+delete") }
 	      else
-	        deleteNearSelection(this, function(range) {
-	          var other = findPosH(doc, range.head, dir, unit, false);
-	          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other};
-	        });
+	        { deleteNearSelection(this, function (range) {
+	          var other = findPosH(doc, range.head, dir, unit, false)
+	          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
+	        }) }
 	    }),
 
 	    findPosV: function(from, amount, unit, goalColumn) {
-	      var dir = 1, x = goalColumn;
-	      if (amount < 0) { dir = -1; amount = -amount; }
-	      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
-	        var coords = cursorCoords(this, cur, "div");
-	        if (x == null) x = coords.left;
-	        else coords.left = x;
-	        cur = findPosV(this, coords, dir, unit);
-	        if (cur.hitSide) break;
-	      }
-	      return cur;
+	      var this$1 = this;
+
+	      var dir = 1, x = goalColumn
+	      if (amount < 0) { dir = -1; amount = -amount }
+	      var cur = clipPos(this.doc, from)
+	      for (var i = 0; i < amount; ++i) {
+	        var coords = cursorCoords(this$1, cur, "div")
+	        if (x == null) { x = coords.left }
+	        else { coords.left = x }
+	        cur = findPosV(this$1, coords, dir, unit)
+	        if (cur.hitSide) { break }
+	      }
+	      return cur
 	    },
 
 	    moveV: methodOp(function(dir, unit) {
-	      var cm = this, doc = this.doc, goals = [];
-	      var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelected();
-	      doc.extendSelectionsBy(function(range) {
+	      var this$1 = this;
+
+	      var doc = this.doc, goals = []
+	      var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected()
+	      doc.extendSelectionsBy(function (range) {
 	        if (collapse)
-	          return dir < 0 ? range.from() : range.to();
-	        var headPos = cursorCoords(cm, range.head, "div");
-	        if (range.goalColumn != null) headPos.left = range.goalColumn;
-	        goals.push(headPos.left);
-	        var pos = findPosV(cm, headPos, dir, unit);
+	          { return dir < 0 ? range.from() : range.to() }
+	        var headPos = cursorCoords(this$1, range.head, "div")
+	        if (range.goalColumn != null) { headPos.left = range.goalColumn }
+	        goals.push(headPos.left)
+	        var pos = findPosV(this$1, headPos, dir, unit)
 	        if (unit == "page" && range == doc.sel.primary())
-	          addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top);
-	        return pos;
-	      }, sel_move);
-	      if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++)
-	        doc.sel.ranges[i].goalColumn = goals[i];
+	          { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top) }
+	        return pos
+	      }, sel_move)
+	      if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+	        { doc.sel.ranges[i].goalColumn = goals[i] } }
 	    }),
 
 	    // Find the word at the given position (as returned by coordsChar).
 	    findWordAt: function(pos) {
-	      var doc = this.doc, line = getLine(doc, pos.line).text;
-	      var start = pos.ch, end = pos.ch;
+	      var doc = this.doc, line = getLine(doc, pos.line).text
+	      var start = pos.ch, end = pos.ch
 	      if (line) {
-	        var helper = this.getHelper(pos, "wordChars");
-	        if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
-	        var startChar = line.charAt(start);
+	        var helper = this.getHelper(pos, "wordChars")
+	        if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end }
+	        var startChar = line.charAt(start)
 	        var check = isWordChar(startChar, helper)
-	          ? function(ch) { return isWordChar(ch, helper); }
-	          : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
-	          : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
-	        while (start > 0 && check(line.charAt(start - 1))) --start;
-	        while (end < line.length && check(line.charAt(end))) ++end;
-	      }
-	      return new Range(Pos(pos.line, start), Pos(pos.line, end));
+	          ? function (ch) { return isWordChar(ch, helper); }
+	          : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+	          : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); }
+	        while (start > 0 && check(line.charAt(start - 1))) { --start }
+	        while (end < line.length && check(line.charAt(end))) { ++end }
+	      }
+	      return new Range(Pos(pos.line, start), Pos(pos.line, end))
 	    },
 
 	    toggleOverwrite: function(value) {
-	      if (value != null && value == this.state.overwrite) return;
+	      if (value != null && value == this.state.overwrite) { return }
 	      if (this.state.overwrite = !this.state.overwrite)
-	        addClass(this.display.cursorDiv, "CodeMirror-overwrite");
+	        { addClass(this.display.cursorDiv, "CodeMirror-overwrite") }
 	      else
-	        rmClass(this.display.cursorDiv, "CodeMirror-overwrite");
-
-	      signal(this, "overwriteToggle", this, this.state.overwrite);
-	    },
-	    hasFocus: function() { return this.display.input.getField() == activeElt(); },
-	    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit); },
-
-	    scrollTo: methodOp(function(x, y) {
-	      if (x != null || y != null) resolveScrollToPos(this);
-	      if (x != null) this.curOp.scrollLeft = x;
-	      if (y != null) this.curOp.scrollTop = y;
-	    }),
+	        { rmClass(this.display.cursorDiv, "CodeMirror-overwrite") }
+
+	      signal(this, "overwriteToggle", this, this.state.overwrite)
+	    },
+	    hasFocus: function() { return this.display.input.getField() == activeElt() },
+	    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+	    scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y) }),
 	    getScrollInfo: function() {
-	      var scroller = this.display.scroller;
+	      var scroller = this.display.scroller
 	      return {left: scroller.scrollLeft, top: scroller.scrollTop,
 	              height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
 	              width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
-	              clientHeight: displayHeight(this), clientWidth: displayWidth(this)};
+	              clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
 	    },
 
 	    scrollIntoView: methodOp(function(range, margin) {
 	      if (range == null) {
-	        range = {from: this.doc.sel.primary().head, to: null};
-	        if (margin == null) margin = this.options.cursorScrollMargin;
+	        range = {from: this.doc.sel.primary().head, to: null}
+	        if (margin == null) { margin = this.options.cursorScrollMargin }
 	      } else if (typeof range == "number") {
-	        range = {from: Pos(range, 0), to: null};
+	        range = {from: Pos(range, 0), to: null}
 	      } else if (range.from == null) {
-	        range = {from: range, to: null};
-	      }
-	      if (!range.to) range.to = range.from;
-	      range.margin = margin || 0;
+	        range = {from: range, to: null}
+	      }
+	      if (!range.to) { range.to = range.from }
+	      range.margin = margin || 0
 
 	      if (range.from.line != null) {
-	        resolveScrollToPos(this);
-	        this.curOp.scrollToPos = range;
-	      } else {
-	        var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.left),
-	                                      Math.min(range.from.top, range.to.top) - range.margin,
-	                                      Math.max(range.from.right, range.to.right),
-	                                      Math.max(range.from.bottom, range.to.bottom) + range.margin);
-	        this.scrollTo(sPos.scrollLeft, sPos.scrollTop);
+	        scrollToRange(this, range)
+	      } else {
+	        scrollToCoordsRange(this, range.from, range.to, range.margin)
 	      }
 	    }),
 
 	    setSize: methodOp(function(width, height) {
-	      var cm = this;
-	      function interpret(val) {
-	        return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
-	      }
-	      if (width != null) cm.display.wrapper.style.width = interpret(width);
-	      if (height != null) cm.display.wrapper.style.height = interpret(height);
-	      if (cm.options.lineWrapping) clearLineMeasurementCache(this);
-	      var lineNo = cm.display.viewFrom;
-	      cm.doc.iter(lineNo, cm.display.viewTo, function(line) {
-	        if (line.widgets) for (var i = 0; i < line.widgets.length; i++)
-	          if (line.widgets[i].noHScroll) { regLineChange(cm, lineNo, "widget"); break; }
-	        ++lineNo;
-	      });
-	      cm.curOp.forceUpdate = true;
-	      signal(cm, "refresh", this);
+	      var this$1 = this;
+
+	      var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; }
+	      if (width != null) { this.display.wrapper.style.width = interpret(width) }
+	      if (height != null) { this.display.wrapper.style.height = interpret(height) }
+	      if (this.options.lineWrapping) { clearLineMeasurementCache(this) }
+	      var lineNo = this.display.viewFrom
+	      this.doc.iter(lineNo, this.display.viewTo, function (line) {
+	        if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+	          { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
+	        ++lineNo
+	      })
+	      this.curOp.forceUpdate = true
+	      signal(this, "refresh", this)
 	    }),
 
-	    operation: function(f){return runInOp(this, f);},
+	    operation: function(f){return runInOp(this, f)},
 
 	    refresh: methodOp(function() {
-	      var oldHeight = this.display.cachedTextHeight;
-	      regChange(this);
-	      this.curOp.forceUpdate = true;
-	      clearCaches(this);
-	      this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
-	      updateGutterSpace(this);
+	      var oldHeight = this.display.cachedTextHeight
+	      regChange(this)
+	      this.curOp.forceUpdate = true
+	      clearCaches(this)
+	      scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop)
+	      updateGutterSpace(this)
 	      if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
-	        estimateLineHeights(this);
-	      signal(this, "refresh", this);
+	        { estimateLineHeights(this) }
+	      signal(this, "refresh", this)
 	    }),
 
 	    swapDoc: methodOp(function(doc) {
-	      var old = this.doc;
-	      old.cm = null;
-	      attachDoc(this, doc);
-	      clearCaches(this);
-	      this.display.input.reset();
-	      this.scrollTo(doc.scrollLeft, doc.scrollTop);
-	      this.curOp.forceScroll = true;
-	      signalLater(this, "swapDoc", this, old);
-	      return old;
+	      var old = this.doc
+	      old.cm = null
+	      attachDoc(this, doc)
+	      clearCaches(this)
+	      this.display.input.reset()
+	      scrollToCoords(this, doc.scrollLeft, doc.scrollTop)
+	      this.curOp.forceScroll = true
+	      signalLater(this, "swapDoc", this, old)
+	      return old
 	    }),
 
-	    getInputField: function(){return this.display.input.getField();},
-	    getWrapperElement: function(){return this.display.wrapper;},
-	    getScrollerElement: function(){return this.display.scroller;},
-	    getGutterElement: function(){return this.display.gutters;}
-	  };
-	  eventMixin(CodeMirror);
-
-	  // OPTION DEFAULTS
-
-	  // The default configuration options.
-	  var defaults = CodeMirror.defaults = {};
-	  // Functions to run when options are changed.
-	  var optionHandlers = CodeMirror.optionHandlers = {};
-
-	  function option(name, deflt, handle, notOnInit) {
-	    CodeMirror.defaults[name] = deflt;
-	    if (handle) optionHandlers[name] =
-	      notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
-	  }
-
-	  // Passed to option handlers when there is no old value.
-	  var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
-
-	  // These two are, on init, called from the constructor because they
-	  // have to be initialized before the editor can start at all.
-	  option("value", "", function(cm, val) {
-	    cm.setValue(val);
-	  }, true);
-	  option("mode", null, function(cm, val) {
-	    cm.doc.modeOption = val;
-	    loadMode(cm);
-	  }, true);
-
-	  option("indentUnit", 2, loadMode, true);
-	  option("indentWithTabs", false);
-	  option("smartIndent", true);
-	  option("tabSize", 4, function(cm) {
-	    resetModeState(cm);
-	    clearCaches(cm);
-	    regChange(cm);
-	  }, true);
-	  option("lineSeparator", null, function(cm, val) {
-	    cm.doc.lineSep = val;
-	    if (!val) return;
-	    var newBreaks = [], lineNo = cm.doc.first;
-	    cm.doc.iter(function(line) {
-	      for (var pos = 0;;) {
-	        var found = line.text.indexOf(val, pos);
-	        if (found == -1) break;
-	        pos = found + val.length;
-	        newBreaks.push(Pos(lineNo, found));
-	      }
-	      lineNo++;
-	    });
-	    for (var i = newBreaks.length - 1; i >= 0; i--)
-	      replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length))
-	  });
-	  option("specialChars", /[\u0000-\u001f\u007f\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val, old) {
-	    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
-	    if (old != CodeMirror.Init) cm.refresh();
-	  });
-	  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
-	  option("electricChars", true);
-	  option("inputStyle", mobile ? "contenteditable" : "textarea", function() {
-	    throw new Error("inputStyle can not (yet) be changed in a running editor"); // FIXME
-	  }, true);
-	  option("rtlMoveVisually", !windows);
-	  option("wholeLineUpdateBefore", true);
-
-	  option("theme", "default", function(cm) {
-	    themeChanged(cm);
-	    guttersChanged(cm);
-	  }, true);
-	  option("keyMap", "default", function(cm, val, old) {
-	    var next = getKeyMap(val);
-	    var prev = old != CodeMirror.Init && getKeyMap(old);
-	    if (prev && prev.detach) prev.detach(cm, next);
-	    if (next.attach) next.attach(cm, prev || null);
-	  });
-	  option("extraKeys", null);
-
-	  option("lineWrapping", false, wrappingChanged, true);
-	  option("gutters", [], function(cm) {
-	    setGuttersForLineNumbers(cm.options);
-	    guttersChanged(cm);
-	  }, true);
-	  option("fixedGutter", true, function(cm, val) {
-	    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
-	    cm.refresh();
-	  }, true);
-	  option("coverGutterNextToScrollbar", false, function(cm) {updateScrollbars(cm);}, true);
-	  option("scrollbarStyle", "native", function(cm) {
-	    initScrollbars(cm);
-	    updateScrollbars(cm);
-	    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
-	    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
-	  }, true);
-	  option("lineNumbers", false, function(cm) {
-	    setGuttersForLineNumbers(cm.options);
-	    guttersChanged(cm);
-	  }, true);
-	  option("firstLineNumber", 1, guttersChanged, true);
-	  option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
-	  option("showCursorWhenSelecting", false, updateSelection, true);
-
-	  option("resetSelectionOnContextMenu", true);
-	  option("lineWiseCopyCut", true);
-
-	  option("readOnly", false, function(cm, val) {
-	    if (val == "nocursor") {
-	      onBlur(cm);
-	      cm.display.input.blur();
-	      cm.display.disabled = true;
-	    } else {
-	      cm.display.disabled = false;
-	    }
-	    cm.display.input.readOnlyChanged(val)
-	  });
-	  option("disableInput", false, function(cm, val) {if (!val) cm.display.input.reset();}, true);
-	  option("dragDrop", true, dragDropChanged);
-	  option("allowDropFileTypes", null);
-
-	  option("cursorBlinkRate", 530);
-	  option("cursorScrollMargin", 0);
-	  option("cursorHeight", 1, updateSelection, true);
-	  option("singleCursorHeightPerLine", true, updateSelection, true);
-	  option("workTime", 100);
-	  option("workDelay", 100);
-	  option("flattenSpans", true, resetModeState, true);
-	  option("addModeClass", false, resetModeState, true);
-	  option("pollInterval", 100);
-	  option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;});
-	  option("historyEventDelay", 1250);
-	  option("viewportMargin", 10, function(cm){cm.refresh();}, true);
-	  option("maxHighlightLength", 10000, resetModeState, true);
-	  option("moveInputWithCursor", true, function(cm, val) {
-	    if (!val) cm.display.input.resetPosition();
-	  });
-
-	  option("tabindex", null, function(cm, val) {
-	    cm.display.input.getField().tabIndex = val || "";
-	  });
-	  option("autofocus", null);
-
-	  // MODE DEFINITION AND QUERYING
-
-	  // Known modes, by name and by MIME
-	  var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
-
-	  // Extra arguments are stored as the mode's dependencies, which is
-	  // used by (legacy) mechanisms like loadmode.js to automatically
-	  // load a mode. (Preferred mechanism is the require/define calls.)
-	  CodeMirror.defineMode = function(name, mode) {
-	    if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
-	    if (arguments.length > 2)
-	      mode.dependencies = Array.prototype.slice.call(arguments, 2);
-	    modes[name] = mode;
-	  };
-
-	  CodeMirror.defineMIME = function(mime, spec) {
-	    mimeModes[mime] = spec;
-	  };
-
-	  // Given a MIME type, a {name, ...options} config object, or a name
-	  // string, return a mode config object.
-	  CodeMirror.resolveMode = function(spec) {
-	    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
-	      spec = mimeModes[spec];
-	    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
-	      var found = mimeModes[spec.name];
-	      if (typeof found == "string") found = {name: found};
-	      spec = createObj(found, spec);
-	      spec.name = found.name;
-	    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
-	      return CodeMirror.resolveMode("application/xml");
-	    }
-	    if (typeof spec == "string") return {name: spec};
-	    else return spec || {name: "null"};
-	  };
-
-	  // Given a mode spec (anything that resolveMode accepts), find and
-	  // initialize an actual mode object.
-	  CodeMirror.getMode = function(options, spec) {
-	    var spec = CodeMirror.resolveMode(spec);
-	    var mfactory = modes[spec.name];
-	    if (!mfactory) return CodeMirror.getMode(options, "text/plain");
-	    var modeObj = mfactory(options, spec);
-	    if (modeExtensions.hasOwnProperty(spec.name)) {
-	      var exts = modeExtensions[spec.name];
-	      for (var prop in exts) {
-	        if (!exts.hasOwnProperty(prop)) continue;
-	        if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
-	        modeObj[prop] = exts[prop];
-	      }
-	    }
-	    modeObj.name = spec.name;
-	    if (spec.helperType) modeObj.helperType = spec.helperType;
-	    if (spec.modeProps) for (var prop in spec.modeProps)
-	      modeObj[prop] = spec.modeProps[prop];
-
-	    return modeObj;
-	  };
-
-	  // Minimal default mode.
-	  CodeMirror.defineMode("null", function() {
-	    return {token: function(stream) {stream.skipToEnd();}};
-	  });
-	  CodeMirror.defineMIME("text/plain", "null");
-
-	  // This can be used to attach properties to mode objects from
-	  // outside the actual mode definition.
-	  var modeExtensions = CodeMirror.modeExtensions = {};
-	  CodeMirror.extendMode = function(mode, properties) {
-	    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
-	    copyObj(properties, exts);
-	  };
-
-	  // EXTENSIONS
-
-	  CodeMirror.defineExtension = function(name, func) {
-	    CodeMirror.prototype[name] = func;
-	  };
-	  CodeMirror.defineDocExtension = function(name, func) {
-	    Doc.prototype[name] = func;
-	  };
-	  CodeMirror.defineOption = option;
-
-	  var initHooks = [];
-	  CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
-
-	  var helpers = CodeMirror.helpers = {};
+	    getInputField: function(){return this.display.input.getField()},
+	    getWrapperElement: function(){return this.display.wrapper},
+	    getScrollerElement: function(){return this.display.scroller},
+	    getGutterElement: function(){return this.display.gutters}
+	  }
+	  eventMixin(CodeMirror)
+
 	  CodeMirror.registerHelper = function(type, name, value) {
-	    if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
-	    helpers[type][name] = value;
-	  };
+	    if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []} }
+	    helpers[type][name] = value
+	  }
 	  CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
-	    CodeMirror.registerHelper(type, name, value);
-	    helpers[type]._global.push({pred: predicate, val: value});
-	  };
-
-	  // MODE STATE HANDLING
-
-	  // Utility functions for working with state. Exported because nested
-	  // modes need to do this for their inner modes.
-
-	  var copyState = CodeMirror.copyState = function(mode, state) {
-	    if (state === true) return state;
-	    if (mode.copyState) return mode.copyState(state);
-	    var nstate = {};
-	    for (var n in state) {
-	      var val = state[n];
-	      if (val instanceof Array) val = val.concat([]);
-	      nstate[n] = val;
-	    }
-	    return nstate;
-	  };
-
-	  var startState = CodeMirror.startState = function(mode, a1, a2) {
-	    return mode.startState ? mode.startState(a1, a2) : true;
-	  };
-
-	  // Given a mode and a state (for that mode), find the inner mode and
-	  // state at the position that the state refers to.
-	  CodeMirror.innerMode = function(mode, state) {
-	    while (mode.innerMode) {
-	      var info = mode.innerMode(state);
-	      if (!info || info.mode == mode) break;
-	      state = info.state;
-	      mode = info.mode;
-	    }
-	    return info || {mode: mode, state: state};
-	  };
-
-	  // STANDARD COMMANDS
-
-	  // Commands are parameter-less actions that can be performed on an
-	  // editor, mostly used for keybindings.
-	  var commands = CodeMirror.commands = {
-	    selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);},
-	    singleSelection: function(cm) {
-	      cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll);
-	    },
-	    killLine: function(cm) {
-	      deleteNearSelection(cm, function(range) {
-	        if (range.empty()) {
-	          var len = getLine(cm.doc, range.head.line).text.length;
-	          if (range.head.ch == len && range.head.line < cm.lastLine())
-	            return {from: range.head, to: Pos(range.head.line + 1, 0)};
-	          else
-	            return {from: range.head, to: Pos(range.head.line, len)};
-	        } else {
-	          return {from: range.from(), to: range.to()};
-	        }
-	      });
-	    },
-	    deleteLine: function(cm) {
-	      deleteNearSelection(cm, function(range) {
-	        return {from: Pos(range.from().line, 0),
-	                to: clipPos(cm.doc, Pos(range.to().line + 1, 0))};
-	      });
-	    },
-	    delLineLeft: function(cm) {
-	      deleteNearSelection(cm, function(range) {
-	        return {from: Pos(range.from().line, 0), to: range.from()};
-	      });
-	    },
-	    delWrappedLineLeft: function(cm) {
-	      deleteNearSelection(cm, function(range) {
-	        var top = cm.charCoords(range.head, "div").top + 5;
-	        var leftPos = cm.coordsChar({left: 0, top: top}, "div");
-	        return {from: leftPos, to: range.from()};
-	      });
-	    },
-	    delWrappedLineRight: function(cm) {
-	      deleteNearSelection(cm, function(range) {
-	        var top = cm.charCoords(range.head, "div").top + 5;
-	        var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
-	        return {from: range.from(), to: rightPos };
-	      });
-	    },
-	    undo: function(cm) {cm.undo();},
-	    redo: function(cm) {cm.redo();},
-	    undoSelection: function(cm) {cm.undoSelection();},
-	    redoSelection: function(cm) {cm.redoSelection();},
-	    goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
-	    goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
-	    goLineStart: function(cm) {
-	      cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.line); },
-	                            {origin: "+move", bias: 1});
-	    },
-	    goLineStartSmart: function(cm) {
-	      cm.extendSelectionsBy(function(range) {
-	        return lineStartSmart(cm, range.head);
-	      }, {origin: "+move", bias: 1});
-	    },
-	    goLineEnd: function(cm) {
-	      cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); },
-	                            {origin: "+move", bias: -1});
-	    },
-	    goLineRight: function(cm) {
-	      cm.extendSelectionsBy(function(range) {
-	        var top = cm.charCoords(range.head, "div").top + 5;
-	        return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
-	      }, sel_move);
-	    },
-	    goLineLeft: function(cm) {
-	      cm.extendSelectionsBy(function(range) {
-	        var top = cm.charCoords(range.head, "div").top + 5;
-	        return cm.coordsChar({left: 0, top: top}, "div");
-	      }, sel_move);
-	    },
-	    goLineLeftSmart: function(cm) {
-	      cm.extendSelectionsBy(function(range) {
-	        var top = cm.charCoords(range.head, "div").top + 5;
-	        var pos = cm.coordsChar({left: 0, top: top}, "div");
-	        if (pos.ch < cm.getLine(pos.line).search(/\S/)) return lineStartSmart(cm, range.head);
-	        return pos;
-	      }, sel_move);
-	    },
-	    goLineUp: function(cm) {cm.moveV(-1, "line");},
-	    goLineDown: function(cm) {cm.moveV(1, "line");},
-	    goPageUp: function(cm) {cm.moveV(-1, "page");},
-	    goPageDown: function(cm) {cm.moveV(1, "page");},
-	    goCharLeft: function(cm) {cm.moveH(-1, "char");},
-	    goCharRight: function(cm) {cm.moveH(1, "char");},
-	    goColumnLeft: function(cm) {cm.moveH(-1, "column");},
-	    goColumnRight: function(cm) {cm.moveH(1, "column");},
-	    goWordLeft: function(cm) {cm.moveH(-1, "word");},
-	    goGroupRight: function(cm) {cm.moveH(1, "group");},
-	    goGroupLeft: function(cm) {cm.moveH(-1, "group");},
-	    goWordRight: function(cm) {cm.moveH(1, "word");},
-	    delCharBefore: function(cm) {cm.deleteH(-1, "char");},
-	    delCharAfter: function(cm) {cm.deleteH(1, "char");},
-	    delWordBefore: function(cm) {cm.deleteH(-1, "word");},
-	    delWordAfter: function(cm) {cm.deleteH(1, "word");},
-	    delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
-	    delGroupAfter: function(cm) {cm.deleteH(1, "group");},
-	    indentAuto: function(cm) {cm.indentSelection("smart");},
-	    indentMore: function(cm) {cm.indentSelection("add");},
-	    indentLess: function(cm) {cm.indentSelection("subtract");},
-	    insertTab: function(cm) {cm.replaceSelection("\t");},
-	    insertSoftTab: function(cm) {
-	      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
-	      for (var i = 0; i < ranges.length; i++) {
-	        var pos = ranges[i].from();
-	        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
-	        spaces.push(spaceStr(tabSize - col % tabSize));
-	      }
-	      cm.replaceSelections(spaces);
-	    },
-	    defaultTab: function(cm) {
-	      if (cm.somethingSelected()) cm.indentSelection("add");
-	      else cm.execCommand("insertTab");
-	    },
-	    transposeChars: function(cm) {
-	      runInOp(cm, function() {
-	        var ranges = cm.listSelections(), newSel = [];
-	        for (var i = 0; i < ranges.length; i++) {
-	          var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
-	          if (line) {
-	            if (cur.ch == line.length) cur = new Pos(cur.line, cur.ch - 1);
-	            if (cur.ch > 0) {
-	              cur = new Pos(cur.line, cur.ch + 1);
-	              cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
-	                              Pos(cur.line, cur.ch - 2), cur, "+transpose");
-	            } else if (cur.line > cm.doc.first) {
-	              var prev = getLine(cm.doc, cur.line - 1).text;
-	              if (prev)
-	                cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
-	                                prev.charAt(prev.length - 1),
-	                                Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose");
-	            }
-	          }
-	          newSel.push(new Range(cur, cur));
-	        }
-	        cm.setSelections(newSel);
-	      });
-	    },
-	    newlineAndIndent: function(cm) {
-	      runInOp(cm, function() {
-	        var len = cm.listSelections().length;
-	        for (var i = 0; i < len; i++) {
-	          var range = cm.listSelections()[i];
-	          cm.replaceRange(cm.doc.lineSeparator(), range.anchor, range.head, "+input");
-	          cm.indentLine(range.from().line + 1, null, true);
-	        }
-	        ensureCursorVisible(cm);
-	      });
-	    },
-	    openLine: function(cm) {cm.replaceSelection("\n", "start")},
-	    toggleOverwrite: function(cm) {cm.toggleOverwrite();}
-	  };
-
-
-	  // STANDARD KEYMAPS
-
-	  var keyMap = CodeMirror.keyMap = {};
-
-	  keyMap.basic = {
-	    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
-	    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
-	    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
-	    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
-	    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
-	    "Esc": "singleSelection"
-	  };
-	  // Note that the save and find-related commands aren't defined by
-	  // default. User code or addons can define them. Unknown commands
-	  // are simply ignored.
-	  keyMap.pcDefault = {
-	    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
-	    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
-	    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
-	    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
-	    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
-	    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
-	    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
-	    fallthrough: "basic"
-	  };
-	  // Very basic readline/emacs-style bindings, which are standard on Mac.
-	  keyMap.emacsy = {
-	    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
-	    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
-	    "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
-	    "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
-	    "Ctrl-O": "openLine"
-	  };
-	  keyMap.macDefault = {
-	    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
-	    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
-	    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
-	    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
-	    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
-	    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
-	    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
-	    fallthrough: ["basic", "emacsy"]
-	  };
-	  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
-
-	  // KEYMAP DISPATCH
-
-	  function normalizeKeyName(name) {
-	    var parts = name.split(/-(?!$)/), name = parts[parts.length - 1];
-	    var alt, ctrl, shift, cmd;
-	    for (var i = 0; i < parts.length - 1; i++) {
-	      var mod = parts[i];
-	      if (/^(cmd|meta|m)$/i.test(mod)) cmd = true;
-	      else if (/^a(lt)?$/i.test(mod)) alt = true;
-	      else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;
-	      else if (/^s(hift)$/i.test(mod)) shift = true;
-	      else throw new Error("Unrecognized modifier name: " + mod);
-	    }
-	    if (alt) name = "Alt-" + name;
-	    if (ctrl) name = "Ctrl-" + name;
-	    if (cmd) name = "Cmd-" + name;
-	    if (shift) name = "Shift-" + name;
-	    return name;
-	  }
-
-	  // This is a kludge to keep keymaps mostly working as raw objects
-	  // (backwards compatibility) while at the same time support features
-	  // like normalization and multi-stroke key bindings. It compiles a
-	  // new normalized keymap, and then updates the old object to reflect
-	  // this.
-	  CodeMirror.normalizeKeyMap = function(keymap) {
-	    var copy = {};
-	    for (var keyname in keymap) if (keymap.hasOwnProperty(keyname)) {
-	      var value = keymap[keyname];
-	      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue;
-	      if (value == "...") { delete keymap[keyname]; continue; }
-
-	      var keys = map(keyname.split(" "), normalizeKeyName);
-	      for (var i = 0; i < keys.length; i++) {
-	        var val, name;
-	        if (i == keys.length - 1) {
-	          name = keys.join(" ");
-	          val = value;
-	        } else {
-	          name = keys.slice(0, i + 1).join(" ");
-	          val = "...";
-	        }
-	        var prev = copy[name];
-	        if (!prev) copy[name] = val;
-	        else if (prev != val) throw new Error("Inconsistent bindings for " + name);
-	      }
-	      delete keymap[keyname];
-	    }
-	    for (var prop in copy) keymap[prop] = copy[prop];
-	    return keymap;
-	  };
-
-	  var lookupKey = CodeMirror.lookupKey = function(key, map, handle, context) {
-	    map = getKeyMap(map);
-	    var found = map.call ? map.call(key, context) : map[key];
-	    if (found === false) return "nothing";
-	    if (found === "...") return "multi";
-	    if (found != null && handle(found)) return "handled";
-
-	    if (map.fallthrough) {
-	      if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
-	        return lookupKey(key, map.fallthrough, handle, context);
-	      for (var i = 0; i < map.fallthrough.length; i++) {
-	        var result = lookupKey(key, map.fallthrough[i], handle, context);
-	        if (result) return result;
-	      }
-	    }
-	  };
-
-	  // Modifier key presses don't count as 'real' key presses for the
-	  // purpose of keymap fallthrough.
-	  var isModifierKey = CodeMirror.isModifierKey = function(value) {
-	    var name = typeof value == "string" ? value : keyNames[value.keyCode];
-	    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
-	  };
-
-	  // Look up the name of a key as indicated by an event object.
-	  var keyName = CodeMirror.keyName = function(event, noShift) {
-	    if (presto && event.keyCode == 34 && event["char"]) return false;
-	    var base = keyNames[event.keyCode], name = base;
-	    if (name == null || event.altGraphKey) return false;
-	    if (event.altKey && base != "Alt") name = "Alt-" + name;
-	    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name;
-	    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") name = "Cmd-" + name;
-	    if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name;
-	    return name;
-	  };
-
-	  function getKeyMap(val) {
-	    return typeof val == "string" ? keyMap[val] : val;
-	  }
-
-	  // FROMTEXTAREA
-
-	  CodeMirror.fromTextArea = function(textarea, options) {
-	    options = options ? copyObj(options) : {};
-	    options.value = textarea.value;
-	    if (!options.tabindex && textarea.tabIndex)
-	      options.tabindex = textarea.tabIndex;
-	    if (!options.placeholder && textarea.placeholder)
-	      options.placeholder = textarea.placeholder;
-	    // Set autofocus to true if this textarea is focused, or if it has
-	    // autofocus and no other element is focused.
-	    if (options.autofocus == null) {
-	      var hasFocus = activeElt();
-	      options.autofocus = hasFocus == textarea ||
-	        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
-	    }
-
-	    function save() {textarea.value = cm.getValue();}
-	    if (textarea.form) {
-	      on(textarea.form, "submit", save);
-	      // Deplorable hack to make the submit method do the right thing.
-	      if (!options.leaveSubmitMethodAlone) {
-	        var form = textarea.form, realSubmit = form.submit;
-	        try {
-	          var wrappedSubmit = form.submit = function() {
-	            save();
-	            form.submit = realSubmit;
-	            form.submit();
-	            form.submit = wrappedSubmit;
-	          };
-	        } catch(e) {}
-	      }
-	    }
-
-	    options.finishInit = function(cm) {
-	      cm.save = save;
-	      cm.getTextArea = function() { return textarea; };
-	      cm.toTextArea = function() {
-	        cm.toTextArea = isNaN; // Prevent this from being ran twice
-	        save();
-	        textarea.parentNode.removeChild(cm.getWrapperElement());
-	        textarea.style.display = "";
-	        if (textarea.form) {
-	          off(textarea.form, "submit", save);
-	          if (typeof textarea.form.submit == "function")
-	            textarea.form.submit = realSubmit;
-	        }
-	      };
-	    };
-
-	    textarea.style.display = "none";
-	    var cm = CodeMirror(function(node) {
-	      textarea.parentNode.insertBefore(node, textarea.nextSibling);
-	    }, options);
-	    return cm;
-	  };
-
-	  // STRING STREAM
-
-	  // Fed to the mode parsers, provides helper functions to make
-	  // parsers more succinct.
-
-	  var StringStream = CodeMirror.StringStream = function(string, tabSize) {
-	    this.pos = this.start = 0;
-	    this.string = string;
-	    this.tabSize = tabSize || 8;
-	    this.lastColumnPos = this.lastColumnValue = 0;
-	    this.lineStart = 0;
-	  };
-
-	  StringStream.prototype = {
-	    eol: function() {return this.pos >= this.string.length;},
-	    sol: function() {return this.pos == this.lineStart;},
-	    peek: function() {return this.string.charAt(this.pos) || undefined;},
-	    next: function() {
-	      if (this.pos < this.string.length)
-	        return this.string.charAt(this.pos++);
-	    },
-	    eat: function(match) {
-	      var ch = this.string.charAt(this.pos);
-	      if (typeof match == "string") var ok = ch == match;
-	      else var ok = ch && (match.test ? match.test(ch) : match(ch));
-	      if (ok) {++this.pos; return ch;}
-	    },
-	    eatWhile: function(match) {
-	      var start = this.pos;
-	      while (this.eat(match)){}
-	      return this.pos > start;
-	    },
-	    eatSpace: function() {
-	      var start = this.pos;
-	      while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
-	      return this.pos > start;
-	    },
-	    skipToEnd: function() {this.pos = this.string.length;},
-	    skipTo: function(ch) {
-	      var found = this.string.indexOf(ch, this.pos);
-	      if (found > -1) {this.pos = found; return true;}
-	    },
-	    backUp: function(n) {this.pos -= n;},
-	    column: function() {
-	      if (this.lastColumnPos < this.start) {
-	        this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
-	        this.lastColumnPos = this.start;
-	      }
-	      return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
-	    },
-	    indentation: function() {
-	      return countColumn(this.string, null, this.tabSize) -
-	        (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
-	    },
-	    match: function(pattern, consume, caseInsensitive) {
-	      if (typeof pattern == "string") {
-	        var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
-	        var substr = this.string.substr(this.pos, pattern.length);
-	        if (cased(substr) == cased(pattern)) {
-	          if (consume !== false) this.pos += pattern.length;
-	          return true;
-	        }
-	      } else {
-	        var match = this.string.slice(this.pos).match(pattern);
-	        if (match && match.index > 0) return null;
-	        if (match && consume !== false) this.pos += match[0].length;
-	        return match;
-	      }
-	    },
-	    current: function(){return this.string.slice(this.start, this.pos);},
-	    hideFirstChars: function(n, inner) {
-	      this.lineStart += n;
-	      try { return inner(); }
-	      finally { this.lineStart -= n; }
-	    }
-	  };
-
-	  // TEXTMARKERS
-
-	  // Created with markText and setBookmark methods. A TextMarker is a
-	  // handle that can be used to clear or find a marked position in the
-	  // document. Line objects hold arrays (markedSpans) containing
-	  // {from, to, marker} object pointing to such marker objects, and
-	  // indicating that such a marker is present on that line. Multiple
-	  // lines may point to the same marker when it spans across lines.
-	  // The spans will have null for their from/to properties when the
-	  // marker continues beyond the start/end of the line. Markers have
-	  // links back to the lines they currently touch.
-
-	  var nextMarkerId = 0;
-
-	  var TextMarker = CodeMirror.TextMarker = function(doc, type) {
-	    this.lines = [];
-	    this.type = type;
-	    this.doc = doc;
-	    this.id = ++nextMarkerId;
-	  };
-	  eventMixin(TextMarker);
-
-	  // Clear the marker.
-	  TextMarker.prototype.clear = function() {
-	    if (this.explicitlyCleared) return;
-	    var cm = this.doc.cm, withOp = cm && !cm.curOp;
-	    if (withOp) startOperation(cm);
-	    if (hasHandler(this, "clear")) {
-	      var found = this.find();
-	      if (found) signalLater(this, "clear", found.from, found.to);
-	    }
-	    var min = null, max = null;
-	    for (var i = 0; i < this.lines.length; ++i) {
-	      var line = this.lines[i];
-	      var span = getMarkedSpanFor(line.markedSpans, this);
-	      if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text");
-	      else if (cm) {
-	        if (span.to != null) max = lineNo(line);
-	        if (span.from != null) min = lineNo(line);
-	      }
-	      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
-	      if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
-	        updateLineHeight(line, textHeight(cm.display));
-	    }
-	    if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
-	      var visual = visualLine(this.lines[i]), len = lineLength(visual);
-	      if (len > cm.display.maxLineLength) {
-	        cm.display.maxLine = visual;
-	        cm.display.maxLineLength = len;
-	        cm.display.maxLineChanged = true;
-	      }
-	    }
-
-	    if (min != null && cm && this.collapsed) regChange(cm, min, max + 1);
-	    this.lines.length = 0;
-	    this.explicitlyCleared = true;
-	    if (this.atomic && this.doc.cantEdit) {
-	      this.doc.cantEdit = false;
-	      if (cm) reCheckSelection(cm.doc);
-	    }
-	    if (cm) signalLater(cm, "markerCleared", cm, this);
-	    if (withOp) endOperation(cm);
-	    if (this.parent) this.parent.clear();
-	  };
-
-	  // Find the position of the marker in the document. Returns a {from,
-	  // to} object by default. Side can be passed to get a specific side
-	  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
-	  // Pos objects returned contain a line object, rather than a line
-	  // number (used to prevent looking up the same line twice).
-	  TextMarker.prototype.find = function(side, lineObj) {
-	    if (side == null && this.type == "bookmark") side = 1;
-	    var from, to;
-	    for (var i = 0; i < this.lines.length; ++i) {
-	      var line = this.lines[i];
-	      var span = getMarkedSpanFor(line.markedSpans, this);
-	      if (span.from != null) {
-	        from = Pos(lineObj ? line : lineNo(line), span.from);
-	        if (side == -1) return from;
-	      }
-	      if (span.to != null) {
-	        to = Pos(lineObj ? line : lineNo(line), span.to);
-	        if (side == 1) return to;
-	      }
-	    }
-	    return from && {from: from, to: to};
-	  };
-
-	  // Signals that the marker's widget changed, and surrounding layout
-	  // should be recomputed.
-	  TextMarker.prototype.changed = function() {
-	    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
-	    if (!pos || !cm) return;
-	    runInOp(cm, function() {
-	      var line = pos.line, lineN = lineNo(pos.line);
-	      var view = findViewForLine(cm, lineN);
-	      if (view) {
-	        clearLineMeasurementCacheFor(view);
-	        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
-	      }
-	      cm.curOp.updateMaxLine = true;
-	      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
-	        var oldHeight = widget.height;
-	        widget.height = null;
-	        var dHeight = widgetHeight(widget) - oldHeight;
-	        if (dHeight)
-	          updateLineHeight(line, line.height + dHeight);
-	      }
-	    });
-	  };
-
-	  TextMarker.prototype.attachLine = function(line) {
-	    if (!this.lines.length && this.doc.cm) {
-	      var op = this.doc.cm.curOp;
-	      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
-	        (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
-	    }
-	    this.lines.push(line);
-	  };
-	  TextMarker.prototype.detachLine = function(line) {
-	    this.lines.splice(indexOf(this.lines, line), 1);
-	    if (!this.lines.length && this.doc.cm) {
-	      var op = this.doc.cm.curOp;
-	      (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
-	    }
-	  };
-
-	  // Collapsed markers have unique ids, in order to be able to order
-	  // them, which is needed for uniquely determining an outer marker
-	  // when they overlap (they may nest, but not partially overlap).
-	  var nextMarkerId = 0;
-
-	  // Create a marker, wire it up to the right lines, and
-	  function markText(doc, from, to, options, type) {
-	    // Shared markers (across linked documents) are handled separately
-	    // (markTextShared will call out to this again, once per
-	    // document).
-	    if (options && options.shared) return markTextShared(doc, from, to, options, type);
-	    // Ensure we are in an operation.
-	    if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
-
-	    var marker = new TextMarker(doc, type), diff = cmp(from, to);
-	    if (options) copyObj(options, marker, false);
-	    // Don't connect empty markers unless clearWhenEmpty is false
-	    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
-	      return marker;
-	    if (marker.replacedWith) {
-	      // Showing up as a widget implies collapsed (widget replaces text)
-	      marker.collapsed = true;
-	      marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget");
-	      if (!options.handleMouseEvents) marker.widgetNode.setAttribute("cm-ignore-events", "true");
-	      if (options.insertLeft) marker.widgetNode.insertLeft = true;
-	    }
-	    if (marker.collapsed) {
-	      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
-	          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
-	        throw new Error("Inserting collapsed marker partially overlapping an existing one");
-	      sawCollapsedSpans = true;
-	    }
-
-	    if (marker.addToHistory)
-	      addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);
-
-	    var curLine = from.line, cm = doc.cm, updateMaxLine;
-	    doc.iter(curLine, to.line + 1, function(line) {
-	      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
-	        updateMaxLine = true;
-	      if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
-	      addMarkedSpan(line, new MarkedSpan(marker,
-	                                         curLine == from.line ? from.ch : null,
-	                                         curLine == to.line ? to.ch : null));
-	      ++curLine;
-	    });
-	    // lineIsHidden depends on the presence of the spans, so needs a second pass
-	    if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
-	      if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
-	    });
-
-	    if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
-
-	    if (marker.readOnly) {
-	      sawReadOnlySpans = true;
-	      if (doc.history.done.length || doc.history.undone.length)
-	        doc.clearHistory();
-	    }
-	    if (marker.collapsed) {
-	      marker.id = ++nextMarkerId;
-	      marker.atomic = true;
-	    }
-	    if (cm) {
-	      // Sync editor state
-	      if (updateMaxLine) cm.curOp.updateMaxLine = true;
-	      if (marker.collapsed)
-	        regChange(cm, from.line, to.line + 1);
-	      else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
-	        for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text");
-	      if (marker.atomic) reCheckSelection(cm.doc);
-	      signalLater(cm, "markerAdded", cm, marker);
-	    }
-	    return marker;
-	  }
-
-	  // SHARED TEXTMARKERS
-
-	  // A shared marker spans multiple linked documents. It is
-	  // implemented as a meta-marker-object controlling multiple normal
-	  // markers.
-	  var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary) {
-	    this.markers = markers;
-	    this.primary = primary;
-	    for (var i = 0; i < markers.length; ++i)
-	      markers[i].parent = this;
-	  };
-	  eventMixin(SharedTextMarker);
-
-	  SharedTextMarker.prototype.clear = function() {
-	    if (this.explicitlyCleared) return;
-	    this.explicitlyCleared = true;
-	    for (var i = 0; i < this.markers.length; ++i)
-	      this.markers[i].clear();
-	    signalLater(this, "clear");
-	  };
-	  SharedTextMarker.prototype.find = function(side, lineObj) {
-	    return this.primary.find(side, lineObj);
-	  };
-
-	  function markTextShared(doc, from, to, options, type) {
-	    options = copyObj(options);
-	    options.shared = false;
-	    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
-	    var widget = options.widgetNode;
-	    linkedDocs(doc, function(doc) {
-	      if (widget) options.widgetNode = widget.cloneNode(true);
-	      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
-	      for (var i = 0; i < doc.linked.length; ++i)
-	        if (doc.linked[i].isParent) return;
-	      primary = lst(markers);
-	    });
-	    return new SharedTextMarker(markers, primary);
-	  }
-
-	  function findSharedMarkers(doc) {
-	    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())),
-	                         function(m) { return m.parent; });
-	  }
-
-	  function copySharedMarkers(doc, markers) {
-	    for (var i = 0; i < markers.length; i++) {
-	      var marker = markers[i], pos = marker.find();
-	      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
-	      if (cmp(mFrom, mTo)) {
-	        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
-	        marker.markers.push(subMark);
-	        subMark.parent = marker;
-	      }
-	    }
-	  }
-
-	  function detachSharedMarkers(markers) {
-	    for (var i = 0; i < markers.length; i++) {
-	      var marker = markers[i], linked = [marker.primary.doc];;
-	      linkedDocs(marker.primary.doc, function(d) { linked.push(d); });
-	      for (var j = 0; j < marker.markers.length; j++) {
-	        var subMarker = marker.markers[j];
-	        if (indexOf(linked, subMarker.doc) == -1) {
-	          subMarker.parent = null;
-	          marker.markers.splice(j--, 1);
-	        }
-	      }
-	    }
-	  }
-
-	  // TEXTMARKER SPANS
-
-	  function MarkedSpan(marker, from, to) {
-	    this.marker = marker;
-	    this.from = from; this.to = to;
-	  }
-
-	  // Search an array of spans for a span matching the given marker.
-	  function getMarkedSpanFor(spans, marker) {
-	    if (spans) for (var i = 0; i < spans.length; ++i) {
-	      var span = spans[i];
-	      if (span.marker == marker) return span;
-	    }
-	  }
-	  // Remove a span from an array, returning undefined if no spans are
-	  // left (we don't store arrays for lines without spans).
-	  function removeMarkedSpan(spans, span) {
-	    for (var r, i = 0; i < spans.length; ++i)
-	      if (spans[i] != span) (r || (r = [])).push(spans[i]);
-	    return r;
-	  }
-	  // Add a span to a line.
-	  function addMarkedSpan(line, span) {
-	    line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
-	    span.marker.attachLine(line);
-	  }
-
-	  // Used for the algorithm that adjusts markers for a change in the
-	  // document. These functions cut an array of spans at a given
-	  // character position, returning an array of remaining chunks (or
-	  // undefined if nothing remains).
-	  function markedSpansBefore(old, startCh, isInsert) {
-	    if (old) for (var i = 0, nw; i < old.length; ++i) {
-	      var span = old[i], marker = span.marker;
-	      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
-	      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
-	        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
-	        (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
-	      }
-	    }
-	    return nw;
-	  }
-	  function markedSpansAfter(old, endCh, isInsert) {
-	    if (old) for (var i = 0, nw; i < old.length; ++i) {
-	      var span = old[i], marker = span.marker;
-	      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
-	      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
-	        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
-	        (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
-	                                              span.to == null ? null : span.to - endCh));
-	      }
-	    }
-	    return nw;
-	  }
-
-	  // Given a change object, compute the new set of marker spans that
-	  // cover the line in which the change took place. Removes spans
-	  // entirely within the change, reconnects spans belonging to the
-	  // same marker that appear on both sides of the change, and cuts off
-	  // spans partially within the change. Returns an array of span
-	  // arrays with one element for each line in (after) the change.
-	  function stretchSpansOverChange(doc, change) {
-	    if (change.full) return null;
-	    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
-	    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
-	    if (!oldFirst && !oldLast) return null;
-
-	    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
-	    // Get the spans that 'stick out' on both sides
-	    var first = markedSpansBefore(oldFirst, startCh, isInsert);
-	    var last = markedSpansAfter(oldLast, endCh, isInsert);
-
-	    // Next, merge those two ends
-	    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
-	    if (first) {
-	      // Fix up .to properties of first
-	      for (var i = 0; i < first.length; ++i) {
-	        var span = first[i];
-	        if (span.to == null) {
-	          var found = getMarkedSpanFor(last, span.marker);
-	          if (!found) span.to = startCh;
-	          else if (sameLine) span.to = found.to == null ? null : found.to + offset;
-	        }
-	      }
-	    }
-	    if (last) {
-	      // Fix up .from in last (or move them into first in case of sameLine)
-	      for (var i = 0; i < last.length; ++i) {
-	        var span = last[i];
-	        if (span.to != null) span.to += offset;
-	        if (span.from == null) {
-	          var found = getMarkedSpanFor(first, span.marker);
-	          if (!found) {
-	            span.from = offset;
-	            if (sameLine) (first || (first = [])).push(span);
-	          }
-	        } else {
-	          span.from += offset;
-	          if (sameLine) (first || (first = [])).push(span);
-	        }
-	      }
-	    }
-	    // Make sure we didn't create any zero-length spans
-	    if (first) first = clearEmptySpans(first);
-	    if (last && last != first) last = clearEmptySpans(last);
-
-	    var newMarkers = [first];
-	    if (!sameLine) {
-	      // Fill gap with whole-line-spans
-	      var gap = change.text.length - 2, gapMarkers;
-	      if (gap > 0 && first)
-	        for (var i = 0; i < first.length; ++i)
-	          if (first[i].to == null)
-	            (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marker, null, null));
-	      for (var i = 0; i < gap; ++i)
-	        newMarkers.push(gapMarkers);
-	      newMarkers.push(last);
-	    }
-	    return newMarkers;
-	  }
-
-	  // Remove spans that are empty and don't have a clearWhenEmpty
-	  // option of false.
-	  function clearEmptySpans(spans) {
-	    for (var i = 0; i < spans.length; ++i) {
-	      var span = spans[i];
-	      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
-	        spans.splice(i--, 1);
-	    }
-	    if (!spans.length) return null;
-	    return spans;
-	  }
-
-	  // Used for un/re-doing changes from the history. Combines the
-	  // result of computing the existing spans with the set of spans that
-	  // existed in the history (so that deleting around a span and then
-	  // undoing brings back the span).
-	  function mergeOldSpans(doc, change) {
-	    var old = getOldSpans(doc, change);
-	    var stretched = stretchSpansOverChange(doc, change);
-	    if (!old) return stretched;
-	    if (!stretched) return old;
-
-	    for (var i = 0; i < old.length; ++i) {
-	      var oldCur = old[i], stretchCur = stretched[i];
-	      if (oldCur && stretchCur) {
-	        spans: for (var j = 0; j < stretchCur.length; ++j) {
-	          var span = stretchCur[j];
-	          for (var k = 0; k < oldCur.length; ++k)
-	            if (oldCur[k].marker == span.marker) continue spans;
-	          oldCur.push(span);
-	        }
-	      } else if (stretchCur) {
-	        old[i] = stretchCur;
-	      }
-	    }
-	    return old;
-	  }
-
-	  // Used to 'clip' out readOnly ranges when making a change.
-	  function removeReadOnlyRanges(doc, from, to) {
-	    var markers = null;
-	    doc.iter(from.line, to.line + 1, function(line) {
-	      if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
-	        var mark = line.markedSpans[i].marker;
-	        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
-	          (markers || (markers = [])).push(mark);
-	      }
-	    });
-	    if (!markers) return null;
-	    var parts = [{from: from, to: to}];
-	    for (var i = 0; i < markers.length; ++i) {
-	      var mk = markers[i], m = mk.find(0);
-	      for (var j = 0; j < parts.length; ++j) {
-	        var p = parts[j];
-	        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue;
-	        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
-	        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
-	          newParts.push({from: p.from, to: m.from});
-	        if (dto > 0 || !mk.inclusiveRight && !dto)
-	          newParts.push({from: m.to, to: p.to});
-	        parts.splice.apply(parts, newParts);
-	        j += newParts.length - 1;
-	      }
-	    }
-	    return parts;
-	  }
-
-	  // Connect or disconnect spans from a line.
-	  function detachMarkedSpans(line) {
-	    var spans = line.markedSpans;
-	    if (!spans) return;
-	    for (var i = 0; i < spans.length; ++i)
-	      spans[i].marker.detachLine(line);
-	    line.markedSpans = null;
-	  }
-	  function attachMarkedSpans(line, spans) {
-	    if (!spans) return;
-	    for (var i = 0; i < spans.length; ++i)
-	      spans[i].marker.attachLine(line);
-	    line.markedSpans = spans;
-	  }
-
-	  // Helpers used when computing which overlapping collapsed span
-	  // counts as the larger one.
-	  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
-	  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
-
-	  // Returns a number indicating which of two overlapping collapsed
-	  // spans is larger (and thus includes the other). Falls back to
-	  // comparing ids when the spans cover exactly the same range.
-	  function compareCollapsedMarkers(a, b) {
-	    var lenDiff = a.lines.length - b.lines.length;
-	    if (lenDiff != 0) return lenDiff;
-	    var aPos = a.find(), bPos = b.find();
-	    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
-	    if (fromCmp) return -fromCmp;
-	    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
-	    if (toCmp) return toCmp;
-	    return b.id - a.id;
-	  }
-
-	  // Find out whether a line ends or starts in a collapsed span. If
-	  // so, return the marker for that span.
-	  function collapsedSpanAtSide(line, start) {
-	    var sps = sawCollapsedSpans && line.markedSpans, found;
-	    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
-	      sp = sps[i];
-	      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
-	          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
-	        found = sp.marker;
-	    }
-	    return found;
-	  }
-	  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
-	  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
-
-	  // Test whether there exists a collapsed span that partially
-	  // overlaps (covers the start or end, but not both) of a new span.
-	  // Such overlap is not allowed.
-	  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
-	    var line = getLine(doc, lineNo);
-	    var sps = sawCollapsedSpans && line.markedSpans;
-	    if (sps) for (var i = 0; i < sps.length; ++i) {
-	      var sp = sps[i];
-	      if (!sp.marker.collapsed) continue;
-	      var found = sp.marker.find(0);
-	      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
-	      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
-	      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
-	      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
-	          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
-	        return true;
-	    }
-	  }
-
-	  // A visual line is a line as drawn on the screen. Folding, for
-	  // example, can cause multiple logical lines to appear on the same
-	  // visual line. This finds the start of the visual line that the
-	  // given line is part of (usually that is the line itself).
-	  function visualLine(line) {
-	    var merged;
-	    while (merged = collapsedSpanAtStart(line))
-	      line = merged.find(-1, true).line;
-	    return line;
-	  }
-
-	  // Returns an array of logical lines that continue the visual line
-	  // started by the argument, or undefined if there are no such lines.
-	  function visualLineContinued(line) {
-	    var merged, lines;
-	    while (merged = collapsedSpanAtEnd(line)) {
-	      line = merged.find(1, true).line;
-	      (lines || (lines = [])).push(line);
-	    }
-	    return lines;
-	  }
-
-	  // Get the line number of the start of the visual line that the
-	  // given line number is part of.
-	  function visualLineNo(doc, lineN) {
-	    var line = getLine(doc, lineN), vis = visualLine(line);
-	    if (line == vis) return lineN;
-	    return lineNo(vis);
-	  }
-	  // Get the line number of the start of the next visual line after
-	  // the given line.
-	  function visualLineEndNo(doc, lineN) {
-	    if (lineN > doc.lastLine()) return lineN;
-	    var line = getLine(doc, lineN), merged;
-	    if (!lineIsHidden(doc, line)) return lineN;
-	    while (merged = collapsedSpanAtEnd(line))
-	      line = merged.find(1, true).line;
-	    return lineNo(line) + 1;
-	  }
-
-	  // Compute whether a line is hidden. Lines count as hidden when they
-	  // are part of a visual line that starts with another line, or when
-	  // they are entirely covered by collapsed, non-widget span.
-	  function lineIsHidden(doc, line) {
-	    var sps = sawCollapsedSpans && line.markedSpans;
-	    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
-	      sp = sps[i];
-	      if (!sp.marker.collapsed) continue;
-	      if (sp.from == null) return true;
-	      if (sp.marker.widgetNode) continue;
-	      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
-	        return true;
-	    }
-	  }
-	  function lineIsHiddenInner(doc, line, span) {
-	    if (span.to == null) {
-	      var end = span.marker.find(1, true);
-	      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker));
-	    }
-	    if (span.marker.inclusiveRight && span.to == line.text.length)
-	      return true;
-	    for (var sp, i = 0; i < line.markedSpans.length; ++i) {
-	      sp = line.markedSpans[i];
-	      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
-	          (sp.to == null || sp.to != span.from) &&
-	          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
-	          lineIsHiddenInner(doc, line, sp)) return true;
-	    }
-	  }
-
-	  // LINE WIDGETS
-
-	  // Line widgets are block elements displayed above or below a line.
-
-	  var LineWidget = CodeMirror.LineWidget = function(doc, node, options) {
-	    if (options) for (var opt in options) if (options.hasOwnProperty(opt))
-	      this[opt] = options[opt];
-	    this.doc = doc;
-	    this.node = node;
-	  };
-	  eventMixin(LineWidget);
-
-	  function adjustScrollWhenAboveVisible(cm, line, diff) {
-	    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
-	      addToScrollPos(cm, null, diff);
-	  }
-
-	  LineWidget.prototype.clear = function() {
-	    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
-	    if (no == null || !ws) return;
-	    for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
-	    if (!ws.length) line.widgets = null;
-	    var height = widgetHeight(this);
-	    updateLineHeight(line, Math.max(0, line.height - height));
-	    if (cm) runInOp(cm, function() {
-	      adjustScrollWhenAboveVisible(cm, line, -height);
-	      regLineChange(cm, no, "widget");
-	    });
-	  };
-	  LineWidget.prototype.changed = function() {
-	    var oldH = this.height, cm = this.doc.cm, line = this.line;
-	    this.height = null;
-	    var diff = widgetHeight(this) - oldH;
-	    if (!diff) return;
-	    updateLineHeight(line, line.height + diff);
-	    if (cm) runInOp(cm, function() {
-	      cm.curOp.forceUpdate = true;
-	      adjustScrollWhenAboveVisible(cm, line, diff);
-	    });
-	  };
-
-	  function widgetHeight(widget) {
-	    if (widget.height != null) return widget.height;
-	    var cm = widget.doc.cm;
-	    if (!cm) return 0;
-	    if (!contains(document.body, widget.node)) {
-	      var parentStyle = "position: relative;";
-	      if (widget.coverGutter)
-	        parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;";
-	      if (widget.noHScroll)
-	        parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;";
-	      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
-	    }
-	    return widget.height = widget.node.parentNode.offsetHeight;
-	  }
-
-	  function addLineWidget(doc, handle, node, options) {
-	    var widget = new LineWidget(doc, node, options);
-	    var cm = doc.cm;
-	    if (cm && widget.noHScroll) cm.display.alignWidgets = true;
-	    changeLine(doc, handle, "widget", function(line) {
-	      var widgets = line.widgets || (line.widgets = []);
-	      if (widget.insertAt == null) widgets.push(widget);
-	      else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
-	      widget.line = line;
-	      if (cm && !lineIsHidden(doc, line)) {
-	        var aboveVisible = heightAtLine(line) < doc.scrollTop;
-	        updateLineHeight(line, line.height + widgetHeight(widget));
-	        if (aboveVisible) addToScrollPos(cm, null, widget.height);
-	        cm.curOp.forceUpdate = true;
-	      }
-	      return true;
-	    });
-	    return widget;
-	  }
-
-	  // LINE DATA STRUCTURE
-
-	  // Line objects. These hold state related to a line, including
-	  // highlighting info (the styles array).
-	  var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
-	    this.text = text;
-	    attachMarkedSpans(this, markedSpans);
-	    this.height = estimateHeight ? estimateHeight(this) : 1;
-	  };
-	  eventMixin(Line);
-	  Line.prototype.lineNo = function() { return lineNo(this); };
-
-	  // Change the content (text, markers) of a line. Automatically
-	  // invalidates cached information and tries to re-estimate the
-	  // line's height.
-	  function updateLine(line, text, markedSpans, estimateHeight) {
-	    line.text = text;
-	    if (line.stateAfter) line.stateAfter = null;
-	    if (line.styles) line.styles = null;
-	    if (line.order != null) line.order = null;
-	    detachMarkedSpans(line);
-	    attachMarkedSpans(line, markedSpans);
-	    var estHeight = estimateHeight ? estimateHeight(line) : 1;
-	    if (estHeight != line.height) updateLineHeight(line, estHeight);
-	  }
-
-	  // Detach a line from the document tree and its markers.
-	  function cleanUpLine(line) {
-	    line.parent = null;
-	    detachMarkedSpans(line);
-	  }
-
-	  function extractLineClasses(type, output) {
-	    if (type) for (;;) {
-	      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
-	      if (!lineClass) break;
-	      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
-	      var prop = lineClass[1] ? "bgClass" : "textClass";
-	      if (output[prop] == null)
-	        output[prop] = lineClass[2];
-	      else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
-	        output[prop] += " " + lineClass[2];
-	    }
-	    return type;
-	  }
-
-	  function callBlankLine(mode, state) {
-	    if (mode.blankLine) return mode.blankLine(state);
-	    if (!mode.innerMode) return;
-	    var inner = CodeMirror.innerMode(mode, state);
-	    if (inner.mode.blankLine) return inner.mode.blankLine(inner.state);
-	  }
-
-	  function readToken(mode, stream, state, inner) {
-	    for (var i = 0; i < 10; i++) {
-	      if (inner) inner[0] = CodeMirror.innerMode(mode, state).mode;
-	      var style = mode.token(stream, state);
-	      if (stream.pos > stream.start) return style;
-	    }
-	    throw new Error("Mode " + mode.name + " failed to advance stream.");
-	  }
-
-	  // Utility for getTokenAt and getLineTokens
-	  function takeToken(cm, pos, precise, asArray) {
-	    function getObj(copy) {
-	      return {start: stream.start, end: stream.pos,
-	              string: stream.current(),
-	              type: style || null,
-	              state: copy ? copyState(doc.mode, state) : state};
-	    }
-
-	    var doc = cm.doc, mode = doc.mode, style;
-	    pos = clipPos(doc, pos);
-	    var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise);
-	    var stream = new StringStream(line.text, cm.options.tabSize), tokens;
-	    if (asArray) tokens = [];
-	    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
-	      stream.start = stream.pos;
-	      style = readToken(mode, stream, state);
-	      if (asArray) tokens.push(getObj(true));
-	    }
-	    return asArray ? tokens : getObj();
-	  }
-
-	  // Run the given mode's parser over a line, calling f for each token.
-	  function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {
-	    var flattenSpans = mode.flattenSpans;
-	    if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
-	    var curStart = 0, curStyle = null;
-	    var stream = new StringStream(text, cm.options.tabSize), style;
-	    var inner = cm.options.addModeClass && [null];
-	    if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses);
-	    while (!stream.eol()) {
-	      if (stream.pos > cm.options.maxHighlightLength) {
-	        flattenSpans = false;
-	        if (forceToEnd) processLine(cm, text, state, stream.pos);
-	        stream.pos = text.length;
-	        style = null;
-	      } else {
-	        style = extractLineClasses(readToken(mode, stream, state, inner), lineClasses);
-	      }
-	      if (inner) {
-	        var mName = inner[0].name;
-	        if (mName) style = "m-" + (style ? mName + " " + style : mName);
-	      }
-	      if (!flattenSpans || curStyle != style) {
-	        while (curStart < stream.start) {
-	          curStart = Math.min(stream.start, curStart + 50000);
-	          f(curStart, curStyle);
-	        }
-	        curStyle = style;
-	      }
-	      stream.start = stream.pos;
-	    }
-	    while (curStart < stream.pos) {
-	      // Webkit seems to refuse to render text nodes longer than 57444 characters
-	      var pos = Math.min(stream.pos, curStart + 50000);
-	      f(pos, curStyle);
-	      curStart = pos;
-	    }
-	  }
-
-	  // Compute a style array (an array starting with a mode generation
-	  // -- for invalidation -- followed by pairs of end positions and
-	  // style strings), which is used to highlight the tokens on the
-	  // line.
-	  function highlightLine(cm, line, state, forceToEnd) {
-	    // A styles array always starts with a number identifying the
-	    // mode/overlays that it is based on (for easy invalidation).
-	    var st = [cm.state.modeGen], lineClasses = {};
-	    // Compute the base array of styles
-	    runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
-	      st.push(end, style);
-	    }, lineClasses, forceToEnd);
-
-	    // Run overlays, adjust style array.
-	    for (var o = 0; o < cm.state.overlays.length; ++o) {
-	      var overlay = cm.state.overlays[o], i = 1, at = 0;
-	      runMode(cm, line.text, overlay.mode, true, function(end, style) {
-	        var start = i;
-	        // Ensure there's a token end at the current position, and that i points at it
-	        while (at < end) {
-	          var i_end = st[i];
-	          if (i_end > end)
-	            st.splice(i, 1, end, st[i+1], i_end);
-	          i += 2;
-	          at = Math.min(end, i_end);
-	        }
-	        if (!style) return;
-	        if (overlay.opaque) {
-	          st.splice(start, i - start, end, "cm-overlay " + style);
-	          i = start + 2;
-	        } else {
-	          for (; start < i; start += 2) {
-	            var cur = st[start+1];
-	            st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style;
-	          }
-	        }
-	      }, lineClasses);
-	    }
-
-	    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null};
-	  }
-
-	  function getLineStyles(cm, line, updateFrontier) {
-	    if (!line.styles || line.styles[0] != cm.state.modeGen) {
-	      var state = getStateBefore(cm, lineNo(line));
-	      var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state);
-	      line.stateAfter = state;
-	      line.styles = result.styles;
-	      if (result.classes) line.styleClasses = result.classes;
-	      else if (line.styleClasses) line.styleClasses = null;
-	      if (updateFrontier === cm.doc.frontier) cm.doc.frontier++;
-	    }
-	    return line.styles;
-	  }
-
-	  // Lightweight form of highlight -- proceed over this line and
-	  // update state, but don't save a style array. Used for lines that
-	  // aren't currently visible.
-	  function processLine(cm, text, state, startAt) {
-	    var mode = cm.doc.mode;
-	    var stream = new StringStream(text, cm.options.tabSize);
-	    stream.start = stream.pos = startAt || 0;
-	    if (text == "") callBlankLine(mode, state);
-	    while (!stream.eol()) {
-	      readToken(mode, stream, state);
-	      stream.start = stream.pos;
-	    }
-	  }
-
-	  // Convert a style as returned by a mode (either null, or a string
-	  // containing one or more styles) to a CSS style. This is cached,
-	  // and also looks for line-wide styles.
-	  var styleToClassCache = {}, styleToClassCacheWithMode = {};
-	  function interpretTokenStyle(style, options) {
-	    if (!style || /^\s*$/.test(style)) return null;
-	    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
-	    return cache[style] ||
-	      (cache[style] = style.replace(/\S+/g, "cm-$&"));
-	  }
-
-	  // Render the DOM representation of the text of a line. Also builds
-	  // up a 'line map', which points at the DOM nodes that represent
-	  // specific stretches of text, and is used by the measuring code.
-	  // The returned object contains the DOM node, this map, and
-	  // information about line-wide styles that were set by the mode.
-	  function buildLineContent(cm, lineView) {
-	    // The padding-right forces the element to have a 'border', which
-	    // is needed on Webkit to be able to get line-level bounding
-	    // rectangles for it (in measureChar).
-	    var content = elt("span", null, null, webkit ? "padding-right: .1px" : null);
-	    var builder = {pre: elt("pre", [content], "CodeMirror-line"), content: content,
-	                   col: 0, pos: 0, cm: cm,
-	                   splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
-	    lineView.measure = {};
-
-	    // Iterate over the logical lines that make up this visual line.
-	    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
-	      var line = i ? lineView.rest[i - 1] : lineView.line, order;
-	      builder.pos = 0;
-	      builder.addToken = buildToken;
-	      // Optionally wire in some hacks into the token-rendering
-	      // algorithm, to deal with browser quirks.
-	      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
-	        builder.addToken = buildTokenBadBidi(builder.addToken, order);
-	      builder.map = [];
-	      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
-	      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
-	      if (line.styleClasses) {
-	        if (line.styleClasses.bgClass)
-	          builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "");
-	        if (line.styleClasses.textClass)
-	          builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "");
-	      }
-
-	      // Ensure at least a single node is present, for measuring.
-	      if (builder.map.length == 0)
-	        builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure)));
-
-	      // Store the map and a cache object for the current logical line
-	      if (i == 0) {
-	        lineView.measure.map = builder.map;
-	        lineView.measure.cache = {};
-	      } else {
-	        (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map);
-	        (lineView.measure.caches || (lineView.measure.caches = [])).push({});
-	      }
-	    }
-
-	    // See issue #2901
-	    if (webkit) {
-	      var last = builder.content.lastChild
-	      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
-	        builder.content.className = "cm-tab-wrap-hack";
-	    }
-
-	    signal(cm, "renderLine", cm, lineView.line, builder.pre);
-	    if (builder.pre.className)
-	      builder.textClass = joinClasses(builder.pre.className, builder.textClass || "");
-
-	    return builder;
-	  }
-
-	  function defaultSpecialCharPlaceholder(ch) {
-	    var token = elt("span", "\u2022", "cm-invalidchar");
-	    token.title = "\\u" + ch.charCodeAt(0).toString(16);
-	    token.setAttribute("aria-label", token.title);
-	    return token;
-	  }
-
-	  // Build up the DOM representation for a single token, and add it to
-	  // the line map. Takes care to render special characters separately.
-	  function buildToken(builder, text, style, startStyle, endStyle, title, css) {
-	    if (!text) return;
-	    var displayText = builder.splitSpaces ? text.replace(/ {3,}/g, splitSpaces) : text;
-	    var special = builder.cm.state.specialChars, mustWrap = false;
-	    if (!special.test(text)) {
-	      builder.col += text.length;
-	      var content = document.createTextNode(displayText);
-	      builder.map.push(builder.pos, builder.pos + text.length, content);
-	      if (ie && ie_version < 9) mustWrap = true;
-	      builder.pos += text.length;
+	    CodeMirror.registerHelper(type, name, value)
+	    helpers[type]._global.push({pred: predicate, val: value})
+	  }
+	}
+
+	// Used for horizontal relative motion. Dir is -1 or 1 (left or
+	// right), unit can be "char", "column" (like char, but doesn't
+	// cross line boundaries), "word" (across next word), or "group" (to
+	// the start of next group of word or non-word-non-whitespace
+	// chars). The visually param controls whether, in right-to-left
+	// text, direction 1 means to move towards the next index in the
+	// string, or towards the character to the right of the current
+	// position. The resulting position will have a hitSide=true
+	// property if it reached the end of the document.
+	function findPosH(doc, pos, dir, unit, visually) {
+	  var oldPos = pos
+	  var origDir = dir
+	  var lineObj = getLine(doc, pos.line)
+	  function findNextLine() {
+	    var l = pos.line + dir
+	    if (l < doc.first || l >= doc.first + doc.size) { return false }
+	    pos = new Pos(l, pos.ch, pos.sticky)
+	    return lineObj = getLine(doc, l)
+	  }
+	  function moveOnce(boundToLine) {
+	    var next
+	    if (visually) {
+	      next = moveVisually(doc.cm, lineObj, pos, dir)
+	    } else {
+	      next = moveLogically(lineObj, pos, dir)
+	    }
+	    if (next == null) {
+	      if (!boundToLine && findNextLine())
+	        { pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir) }
+	      else
+	        { return false }
 	    } else {
-	      var content = document.createDocumentFragment(), pos = 0;
-	      while (true) {
-	        special.lastIndex = pos;
-	        var m = special.exec(text);
-	        var skipped = m ? m.index - pos : text.length - pos;
-	        if (skipped) {
-	          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
-	          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
-	          else content.appendChild(txt);
-	          builder.map.push(builder.pos, builder.pos + skipped, txt);
-	          builder.col += skipped;
-	          builder.pos += skipped;
-	        }
-	        if (!m) break;
-	        pos += skipped + 1;
-	        if (m[0] == "\t") {
-	          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
-	          var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
-	          txt.setAttribute("role", "presentation");
-	          txt.setAttribute("cm-text", "\t");
-	          builder.col += tabWidth;
-	        } else if (m[0] == "\r" || m[0] == "\n") {
-	          var txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
-	          txt.setAttribute("cm-text", m[0]);
-	          builder.col += 1;
-	        } else {
-	          var txt = builder.cm.options.specialCharPlaceholder(m[0]);
-	          txt.setAttribute("cm-text", m[0]);
-	          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
-	          else content.appendChild(txt);
-	          builder.col += 1;
-	        }
-	        builder.map.push(builder.pos, builder.pos + 1, txt);
-	        builder.pos++;
-	      }
-	    }
-	    if (style || startStyle || endStyle || mustWrap || css) {
-	      var fullStyle = style || "";
-	      if (startStyle) fullStyle += startStyle;
-	      if (endStyle) fullStyle += endStyle;
-	      var token = elt("span", [content], fullStyle, css);
-	      if (title) token.title = title;
-	      return builder.content.appendChild(token);
-	    }
-	    builder.content.appendChild(content);
-	  }
-
-	  function splitSpaces(old) {
-	    var out = " ";
-	    for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
-	    out += " ";
-	    return out;
-	  }
-
-	  // Work around nonsense dimensions being reported for stretches of
-	  // right-to-left text.
-	  function buildTokenBadBidi(inner, order) {
-	    return function(builder, text, style, startStyle, endStyle, title, css) {
-	      style = style ? style + " cm-force-border" : "cm-force-border";
-	      var start = builder.pos, end = start + text.length;
-	      for (;;) {
-	        // Find the part that overlaps with the start of this text
-	        for (var i = 0; i < order.length; i++) {
-	          var part = order[i];
-	          if (part.to > start && part.from <= start) break;
-	        }
-	        if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, title, css);
-	        inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css);
-	        startStyle = null;
-	        text = text.slice(part.to - start);
-	        start = part.to;
-	      }
-	    };
-	  }
-
-	  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
-	    var widget = !ignoreWidget && marker.widgetNode;
-	    if (widget) builder.map.push(builder.pos, builder.pos + size, widget);
-	    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
-	      if (!widget)
-	        widget = builder.content.appendChild(document.createElement("span"));
-	      widget.setAttribute("cm-marker", marker.id);
-	    }
-	    if (widget) {
-	      builder.cm.display.input.setUneditable(widget);
-	      builder.content.appendChild(widget);
-	    }
-	    builder.pos += size;
-	  }
-
-	  // Outputs a number of spans to make up a line, taking highlighting
-	  // and marked text into account.
-	  function insertLineContent(line, builder, styles) {
-	    var spans = line.markedSpans, allText = line.text, at = 0;
-	    if (!spans) {
-	      for (var i = 1; i < styles.length; i+=2)
-	        builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options));
-	      return;
-	    }
-
-	    var len = allText.length, pos = 0, i = 1, text = "", style, css;
-	    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
-	    for (;;) {
-	      if (nextChange == pos) { // Update current marker set
-	        spanStyle = spanEndStyle = spanStartStyle = title = css = "";
-	        collapsed = null; nextChange = Infinity;
-	        var foundBookmarks = [], endStyles
-	        for (var j = 0; j < spans.length; ++j) {
-	          var sp = spans[j], m = sp.marker;
-	          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
-	            foundBookmarks.push(m);
-	          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
-	            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
-	              nextChange = sp.to;
-	              spanEndStyle = "";
-	            }
-	            if (m.className) spanStyle += " " + m.className;
-	            if (m.css) css = (css ? css + ";" : "") + m.css;
-	            if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
-	            if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to)
-	            if (m.title && !title) title = m.title;
-	            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
-	              collapsed = sp;
-	          } else if (sp.from > pos && nextChange > sp.from) {
-	            nextChange = sp.from;
-	          }
-	        }
-	        if (endStyles) for (var j = 0; j < endStyles.length; j += 2)
-	          if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j]
-
-	        if (!collapsed || collapsed.from == pos) for (var j = 0; j < foundBookmarks.length; ++j)
-	          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
-	        if (collapsed && (collapsed.from || 0) == pos) {
-	          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
-	                             collapsed.marker, collapsed.from == null);
-	          if (collapsed.to == null) return;
-	          if (collapsed.to == pos) collapsed = false;
-	        }
-	      }
-	      if (pos >= len) break;
-
-	      var upto = Math.min(len, nextChange);
-	      while (true) {
-	        if (text) {
-	          var end = pos + text.length;
-	          if (!collapsed) {
-	            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
-	            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
-	                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
-	          }
-	          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
-	          pos = end;
-	          spanStartStyle = "";
-	        }
-	        text = allText.slice(at, at = styles[i++]);
-	        style = interpretTokenStyle(styles[i++], builder.cm.options);
-	      }
-	    }
-	  }
-
-	  // DOCUMENT DATA STRUCTURE
-
-	  // By default, updates that start and end at the beginning of a line
-	  // are treated specially, in order to make the association of line
-	  // widgets and marker elements with the text behave more intuitive.
-	  function isWholeLineUpdate(doc, change) {
-	    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
-	      (!doc.cm || doc.cm.options.wholeLineUpdateBefore);
-	  }
-
-	  // Perform a change on the document data structure.
-	  function updateDoc(doc, change, markedSpans, estimateHeight) {
-	    function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
-	    function update(line, text, spans) {
-	      updateLine(line, text, spans, estimateHeight);
-	      signalLater(line, "change", line, change);
-	    }
-	    function linesFor(start, end) {
-	      for (var i = start, result = []; i < end; ++i)
-	        result.push(new Line(text[i], spansFor(i), estimateHeight));
-	      return result;
-	    }
-
-	    var from = change.from, to = change.to, text = change.text;
-	    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
-	    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
-
-	    // Adjust the line structure
-	    if (change.full) {
-	      doc.insert(0, linesFor(0, text.length));
-	      doc.remove(text.length, doc.size - text.length);
-	    } else if (isWholeLineUpdate(doc, change)) {
-	      // This is a whole-line replace. Treated specially to make
-	      // sure line objects move the way they are supposed to.
-	      var added = linesFor(0, text.length - 1);
-	      update(lastLine, lastLine.text, lastSpans);
-	      if (nlines) doc.remove(from.line, nlines);
-	      if (added.length) doc.insert(from.line, added);
-	    } else if (firstLine == lastLine) {
-	      if (text.length == 1) {
-	        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
-	      } else {
-	        var added = linesFor(1, text.length - 1);
-	        added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
-	        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-	        doc.insert(from.line + 1, added);
-	      }
-	    } else if (text.length == 1) {
-	      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
-	      doc.remove(from.line + 1, nlines);
+	      pos = next
+	    }
+	    return true
+	  }
+
+	  if (unit == "char") {
+	    moveOnce()
+	  } else if (unit == "column") {
+	    moveOnce(true)
+	  } else if (unit == "word" || unit == "group") {
+	    var sawType = null, group = unit == "group"
+	    var helper = doc.cm && doc.cm.getHelper(pos, "wordChars")
+	    for (var first = true;; first = false) {
+	      if (dir < 0 && !moveOnce(!first)) { break }
+	      var cur = lineObj.text.charAt(pos.ch) || "\n"
+	      var type = isWordChar(cur, helper) ? "w"
+	        : group && cur == "\n" ? "n"
+	        : !group || /\s/.test(cur) ? null
+	        : "p"
+	      if (group && !first && !type) { type = "s" }
+	      if (sawType && sawType != type) {
+	        if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after"}
+	        break
+	      }
+
+	      if (type) { sawType = type }
+	      if (dir > 0 && !moveOnce(!first)) { break }
+	    }
+	  }
+	  var result = skipAtomic(doc, pos, oldPos, origDir, true)
+	  if (equalCursorPos(oldPos, result)) { result.hitSide = true }
+	  return result
+	}
+
+	// For relative vertical movement. Dir may be -1 or 1. Unit can be
+	// "page" or "line". The resulting position will have a hitSide=true
+	// property if it reached the end of the document.
+	function findPosV(cm, pos, dir, unit) {
+	  var doc = cm.doc, x = pos.left, y
+	  if (unit == "page") {
+	    var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight)
+	    var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3)
+	    y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount
+
+	  } else if (unit == "line") {
+	    y = dir > 0 ? pos.bottom + 3 : pos.top - 3
+	  }
+	  var target
+	  for (;;) {
+	    target = coordsChar(cm, x, y)
+	    if (!target.outside) { break }
+	    if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+	    y += dir * 5
+	  }
+	  return target
+	}
+
+	// CONTENTEDITABLE INPUT STYLE
+
+	var ContentEditableInput = function(cm) {
+	  this.cm = cm
+	  this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
+	  this.polling = new Delayed()
+	  this.composing = null
+	  this.gracePeriod = false
+	  this.readDOMTimeout = null
+	};
+
+	ContentEditableInput.prototype.init = function (display) {
+	    var this$1 = this;
+
+	  var input = this, cm = input.cm
+	  var div = input.div = display.lineDiv
+	  disableBrowserMagic(div, cm.options.spellcheck)
+
+	  on(div, "paste", function (e) {
+	    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+	    // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+	    if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20) }
+	  })
+
+	  on(div, "compositionstart", function (e) {
+	    this$1.composing = {data: e.data, done: false}
+	  })
+	  on(div, "compositionupdate", function (e) {
+	    if (!this$1.composing) { this$1.composing = {data: e.data, done: false} }
+	  })
+	  on(div, "compositionend", function (e) {
+	    if (this$1.composing) {
+	      if (e.data != this$1.composing.data) { this$1.readFromDOMSoon() }
+	      this$1.composing.done = true
+	    }
+	  })
+
+	  on(div, "touchstart", function () { return input.forceCompositionEnd(); })
+
+	  on(div, "input", function () {
+	    if (!this$1.composing) { this$1.readFromDOMSoon() }
+	  })
+
+	  function onCopyCut(e) {
+	    if (signalDOMEvent(cm, e)) { return }
+	    if (cm.somethingSelected()) {
+	      setLastCopied({lineWise: false, text: cm.getSelections()})
+	      if (e.type == "cut") { cm.replaceSelection("", null, "cut") }
+	    } else if (!cm.options.lineWiseCopyCut) {
+	      return
 	    } else {
-	      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-	      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
-	      var added = linesFor(1, text.length - 1);
-	      if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
-	      doc.insert(from.line + 1, added);
-	    }
-
-	    signalLater(doc, "change", doc, change);
-	  }
-
-	  // The document is represented as a BTree consisting of leaves, with
-	  // chunk of lines in them, and branches, with up to ten leaves or
-	  // other branch nodes below them. The top node is always a branch
-	  // node, and is the document object itself (meaning it has
-	  // additional methods and properties).
-	  //
-	  // All nodes have parent links. The tree is used both to go from
-	  // line numbers to line objects, and to go from objects to numbers.
-	  // It also indexes by height, and is used to convert between height
-	  // and line object, and to find the total height of the document.
-	  //
-	  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
-
-	  function LeafChunk(lines) {
-	    this.lines = lines;
-	    this.parent = null;
-	    for (var i = 0, height = 0; i < lines.length; ++i) {
-	      lines[i].parent = this;
-	      height += lines[i].height;
-	    }
-	    this.height = height;
-	  }
-
-	  LeafChunk.prototype = {
-	    chunkSize: function() { return this.lines.length; },
-	    // Remove the n lines at offset 'at'.
-	    removeInner: function(at, n) {
-	      for (var i = at, e = at + n; i < e; ++i) {
-	        var line = this.lines[i];
-	        this.height -= line.height;
-	        cleanUpLine(line);
-	        signalLater(line, "delete");
-	      }
-	      this.lines.splice(at, n);
-	    },
-	    // Helper used to collapse a small branch into a single leaf.
-	    collapse: function(lines) {
-	      lines.push.apply(lines, this.lines);
-	    },
-	    // Insert the given array of lines at offset 'at', count them as
-	    // having the given height.
-	    insertInner: function(at, lines, height) {
-	      this.height += height;
-	      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
-	      for (var i = 0; i < lines.length; ++i) lines[i].parent = this;
-	    },
-	    // Used to iterate over a part of the tree.
-	    iterN: function(at, n, op) {
-	      for (var e = at + n; at < e; ++at)
-	        if (op(this.lines[at])) return true;
-	    }
-	  };
-
-	  function BranchChunk(children) {
-	    this.children = children;
-	    var size = 0, height = 0;
-	    for (var i = 0; i < children.length; ++i) {
-	      var ch = children[i];
-	      size += ch.chunkSize(); height += ch.height;
-	      ch.parent = this;
-	    }
-	    this.size = size;
-	    this.height = height;
-	    this.parent = null;
-	  }
-
-	  BranchChunk.prototype = {
-	    chunkSize: function() { return this.size; },
-	    removeInner: function(at, n) {
-	      this.size -= n;
-	      for (var i = 0; i < this.children.length; ++i) {
-	        var child = this.children[i], sz = child.chunkSize();
-	        if (at < sz) {
-	          var rm = Math.min(n, sz - at), oldHeight = child.height;
-	          child.removeInner(at, rm);
-	          this.height -= oldHeight - child.height;
-	          if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
-	          if ((n -= rm) == 0) break;
-	          at = 0;
-	        } else at -= sz;
-	      }
-	      // If the result is smaller than 25 lines, ensure that it is a
-	      // single leaf node.
-	      if (this.size - n < 25 &&
-	          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
-	        var lines = [];
-	        this.collapse(lines);
-	        this.children = [new LeafChunk(lines)];
-	        this.children[0].parent = this;
-	      }
-	    },
-	    collapse: function(lines) {
-	      for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(lines);
-	    },
-	    insertInner: function(at, lines, height) {
-	      this.size += lines.length;
-	      this.height += height;
-	      for (var i = 0; i < this.children.length; ++i) {
-	        var child = this.children[i], sz = child.chunkSize();
-	        if (at <= sz) {
-	          child.insertInner(at, lines, height);
-	          if (child.lines && child.lines.length > 50) {
-	            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
-	            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
-	            var remaining = child.lines.length % 25 + 25
-	            for (var pos = remaining; pos < child.lines.length;) {
-	              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
-	              child.height -= leaf.height;
-	              this.children.splice(++i, 0, leaf);
-	              leaf.parent = this;
-	            }
-	            child.lines = child.lines.slice(0, remaining);
-	            this.maybeSpill();
-	          }
-	          break;
-	        }
-	        at -= sz;
-	      }
-	    },
-	    // When a node has grown, check whether it should be split.
-	    maybeSpill: function() {
-	      if (this.children.length <= 10) return;
-	      var me = this;
-	      do {
-	        var spilled = me.children.splice(me.children.length - 5, 5);
-	        var sibling = new BranchChunk(spilled);
-	        if (!me.parent) { // Become the parent node
-	          var copy = new BranchChunk(me.children);
-	          copy.parent = me;
-	          me.children = [copy, sibling];
-	          me = copy;
-	       } else {
-	          me.size -= sibling.size;
-	          me.height -= sibling.height;
-	          var myIndex = indexOf(me.parent.children, me);
-	          me.parent.children.splice(myIndex + 1, 0, sibling);
-	        }
-	        sibling.parent = me.parent;
-	      } while (me.children.length > 10);
-	      me.parent.maybeSpill();
-	    },
-	    iterN: function(at, n, op) {
-	      for (var i = 0; i < this.children.length; ++i) {
-	        var child = this.children[i], sz = child.chunkSize();
-	        if (at < sz) {
-	          var used = Math.min(n, sz - at);
-	          if (child.iterN(at, used, op)) return true;
-	          if ((n -= used) == 0) break;
-	          at = 0;
-	        } else at -= sz;
-	      }
-	    }
-	  };
-
-	  var nextDocId = 0;
-	  var Doc = CodeMirror.Doc = function(text, mode, firstLine, lineSep) {
-	    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep);
-	    if (firstLine == null) firstLine = 0;
-
-	    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
-	    this.first = firstLine;
-	    this.scrollTop = this.scrollLeft = 0;
-	    this.cantEdit = false;
-	    this.cleanGeneration = 1;
-	    this.frontier = firstLine;
-	    var start = Pos(firstLine, 0);
-	    this.sel = simpleSelection(start);
-	    this.history = new History(null);
-	    this.id = ++nextDocId;
-	    this.modeOption = mode;
-	    this.lineSep = lineSep;
-	    this.extend = false;
-
-	    if (typeof text == "string") text = this.splitLines(text);
-	    updateDoc(this, {from: start, to: start, text: text});
-	    setSelection(this, simpleSelection(start), sel_dontScroll);
-	  };
-
-	  Doc.prototype = createObj(BranchChunk.prototype, {
-	    constructor: Doc,
-	    // Iterate over the document. Supports two forms -- with only one
-	    // argument, it calls that for each line in the document. With
-	    // three, it iterates over the range given by the first two (with
-	    // the second being non-inclusive).
-	    iter: function(from, to, op) {
-	      if (op) this.iterN(from - this.first, to - from, op);
-	      else this.iterN(this.first, this.first + this.size, from);
-	    },
-
-	    // Non-public interface for adding and removing lines.
-	    insert: function(at, lines) {
-	      var height = 0;
-	      for (var i = 0; i < lines.length; ++i) height += lines[i].height;
-	      this.insertInner(at - this.first, lines, height);
-	    },
-	    remove: function(at, n) { this.removeInner(at - this.first, n); },
-
-	    // From here, the methods are part of the public interface. Most
-	    // are also available from CodeMirror (editor) instances.
-
-	    getValue: function(lineSep) {
-	      var lines = getLines(this, this.first, this.first + this.size);
-	      if (lineSep === false) return lines;
-	      return lines.join(lineSep || this.lineSeparator());
-	    },
-	    setValue: docMethodOp(function(code) {
-	      var top = Pos(this.first, 0), last = this.first + this.size - 1;
-	      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
-	                        text: this.splitLines(code), origin: "setValue", full: true}, true);
-	      setSelection(this, simpleSelection(top));
-	    }),
-	    replaceRange: function(code, from, to, origin) {
-	      from = clipPos(this, from);
-	      to = to ? clipPos(this, to) : from;
-	      replaceRange(this, code, from, to, origin);
-	    },
-	    getRange: function(from, to, lineSep) {
-	      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
-	      if (lineSep === false) return lines;
-	      return lines.join(lineSep || this.lineSeparator());
-	    },
-
-	    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
-
-	    getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
-	    getLineNumber: function(line) {return lineNo(line);},
-
-	    getLineHandleVisualStart: function(line) {
-	      if (typeof line == "number") line = getLine(this, line);
-	      return visualLine(line);
-	    },
-
-	    lineCount: function() {return this.size;},
-	    firstLine: function() {return this.first;},
-	    lastLine: function() {return this.first + this.size - 1;},
-
-	    clipPos: function(pos) {return clipPos(this, pos);},
-
-	    getCursor: function(start) {
-	      var range = this.sel.primary(), pos;
-	      if (start == null || start == "head") pos = range.head;
-	      else if (start == "anchor") pos = range.anchor;
-	      else if (start == "end" || start == "to" || start === false) pos = range.to();
-	      else pos = range.from();
-	      return pos;
-	    },
-	    listSelections: function() { return this.sel.ranges; },
-	    somethingSelected: function() {return this.sel.somethingSelected();},
-
-	    setCursor: docMethodOp(function(line, ch, options) {
-	      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
-	    }),
-	    setSelection: docMethodOp(function(anchor, head, options) {
-	      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
-	    }),
-	    extendSelection: docMethodOp(function(head, other, options) {
-	      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
-	    }),
-	    extendSelections: docMethodOp(function(heads, options) {
-	      extendSelections(this, clipPosArray(this, heads), options);
-	    }),
-	    extendSelectionsBy: docMethodOp(function(f, options) {
-	      var heads = map(this.sel.ranges, f);
-	      extendSelections(this, clipPosArray(this, heads), options);
-	    }),
-	    setSelections: docMethodOp(function(ranges, primary, options) {
-	      if (!ranges.length) return;
-	      for (var i = 0, out = []; i < ranges.length; i++)
-	        out[i] = new Range(clipPos(this, ranges[i].anchor),
-	                           clipPos(this, ranges[i].head));
-	      if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex);
-	      setSelection(this, normalizeSelection(out, primary), options);
-	    }),
-	    addSelection: docMethodOp(function(anchor, head, options) {
-	      var ranges = this.sel.ranges.slice(0);
-	      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
-	      setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
-	    }),
-
-	    getSelection: function(lineSep) {
-	      var ranges = this.sel.ranges, lines;
-	      for (var i = 0; i < ranges.length; i++) {
-	        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
-	        lines = lines ? lines.concat(sel) : sel;
-	      }
-	      if (lineSep === false) return lines;
-	      else return lines.join(lineSep || this.lineSeparator());
-	    },
-	    getSelections: function(lineSep) {
-	      var parts = [], ranges = this.sel.ranges;
-	      for (var i = 0; i < ranges.length; i++) {
-	        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
-	        if (lineSep !== false) sel = sel.join(lineSep || this.lineSeparator());
-	        parts[i] = sel;
-	      }
-	      return parts;
-	    },
-	    replaceSelection: function(code, collapse, origin) {
-	      var dup = [];
-	      for (var i = 0; i < this.sel.ranges.length; i++)
-	        dup[i] = code;
-	      this.replaceSelections(dup, collapse, origin || "+input");
-	    },
-	    replaceSelections: docMethodOp(function(code, collapse, origin) {
-	      var changes = [], sel = this.sel;
-	      for (var i = 0; i < sel.ranges.length; i++) {
-	        var range = sel.ranges[i];
-	        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
-	      }
-	      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
-	      for (var i = changes.length - 1; i >= 0; i--)
-	        makeChange(this, changes[i]);
-	      if (newSel) setSelectionReplaceHistory(this, newSel);
-	      else if (this.cm) ensureCursorVisible(this.cm);
-	    }),
-	    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
-	    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
-	    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
-	    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
-
-	    setExtending: function(val) {this.extend = val;},
-	    getExtending: function() {return this.extend;},
-
-	    historySize: function() {
-	      var hist = this.history, done = 0, undone = 0;
-	      for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done;
-	      for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone;
-	      return {undo: done, redo: undone};
-	    },
-	    clearHistory: function() {this.history = new History(this.history.maxGeneration);},
-
-	    markClean: function() {
-	      this.cleanGeneration = this.changeGeneration(true);
-	    },
-	    changeGeneration: function(forceSplit) {
-	      if (forceSplit)
-	        this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null;
-	      return this.history.generation;
-	    },
-	    isClean: function (gen) {
-	      return this.history.generation == (gen || this.cleanGeneration);
-	    },
-
-	    getHistory: function() {
-	      return {done: copyHistoryArray(this.history.done),
-	              undone: copyHistoryArray(this.history.undone)};
-	    },
-	    setHistory: function(histData) {
-	      var hist = this.history = new History(this.history.maxGeneration);
-	      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
-	      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
-	    },
-
-	    addLineClass: docMethodOp(function(handle, where, cls) {
-	      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
-	        var prop = where == "text" ? "textClass"
-	                 : where == "background" ? "bgClass"
-	                 : where == "gutter" ? "gutterClass" : "wrapClass";
-	        if (!line[prop]) line[prop] = cls;
-	        else if (classTest(cls).test(line[prop])) return false;
-	        else line[prop] += " " + cls;
-	        return true;
-	      });
-	    }),
-	    removeLineClass: docMethodOp(function(handle, where, cls) {
-	      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
-	        var prop = where == "text" ? "textClass"
-	                 : where == "background" ? "bgClass"
-	                 : where == "gutter" ? "gutterClass" : "wrapClass";
-	        var cur = line[prop];
-	        if (!cur) return false;
-	        else if (cls == null) line[prop] = null;
-	        else {
-	          var found = cur.match(classTest(cls));
-	          if (!found) return false;
-	          var end = found.index + found[0].length;
-	          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
-	        }
-	        return true;
-	      });
-	    }),
-
-	    addLineWidget: docMethodOp(function(handle, node, options) {
-	      return addLineWidget(this, handle, node, options);
-	    }),
-	    removeLineWidget: function(widget) { widget.clear(); },
-
-	    markText: function(from, to, options) {
-	      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range");
-	    },
-	    setBookmark: function(pos, options) {
-	      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
-	                      insertLeft: options && options.insertLeft,
-	                      clearWhenEmpty: false, shared: options && options.shared,
-	                      handleMouseEvents: options && options.handleMouseEvents};
-	      pos = clipPos(this, pos);
-	      return markText(this, pos, pos, realOpts, "bookmark");
-	    },
-	    findMarksAt: function(pos) {
-	      pos = clipPos(this, pos);
-	      var markers = [], spans = getLine(this, pos.line).markedSpans;
-	      if (spans) for (var i = 0; i < spans.length; ++i) {
-	        var span = spans[i];
-	        if ((span.from == null || span.from <= pos.ch) &&
-	            (span.to == null || span.to >= pos.ch))
-	          markers.push(span.marker.parent || span.marker);
-	      }
-	      return markers;
-	    },
-	    findMarks: function(from, to, filter) {
-	      from = clipPos(this, from); to = clipPos(this, to);
-	      var found = [], lineNo = from.line;
-	      this.iter(from.line, to.line + 1, function(line) {
-	        var spans = line.markedSpans;
-	        if (spans) for (var i = 0; i < spans.length; i++) {
-	          var span = spans[i];
-	          if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
-	                span.from == null && lineNo != from.line ||
-	                span.from != null && lineNo == to.line && span.from >= to.ch) &&
-	              (!filter || filter(span.marker)))
-	            found.push(span.marker.parent || span.marker);
-	        }
-	        ++lineNo;
-	      });
-	      return found;
-	    },
-	    getAllMarks: function() {
-	      var markers = [];
-	      this.iter(function(line) {
-	        var sps = line.markedSpans;
-	        if (sps) for (var i = 0; i < sps.length; ++i)
-	          if (sps[i].from != null) markers.push(sps[i].marker);
-	      });
-	      return markers;
-	    },
-
-	    posFromIndex: function(off) {
-	      var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
-	      this.iter(function(line) {
-	        var sz = line.text.length + sepSize;
-	        if (sz > off) { ch = off; return true; }
-	        off -= sz;
-	        ++lineNo;
-	      });
-	      return clipPos(this, Pos(lineNo, ch));
-	    },
-	    indexFromPos: function (coords) {
-	      coords = clipPos(this, coords);
-	      var index = coords.ch;
-	      if (coords.line < this.first || coords.ch < 0) return 0;
-	      var sepSize = this.lineSeparator().length;
-	      this.iter(this.first, coords.line, function (line) {
-	        index += line.text.length + sepSize;
-	      });
-	      return index;
-	    },
-
-	    copy: function(copyHistory) {
-	      var doc = new Doc(getLines(this, this.first, this.first + this.size),
-	                        this.modeOption, this.first, this.lineSep);
-	      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
-	      doc.sel = this.sel;
-	      doc.extend = false;
-	      if (copyHistory) {
-	        doc.history.undoDepth = this.history.undoDepth;
-	        doc.setHistory(this.getHistory());
-	      }
-	      return doc;
-	    },
-
-	    linkedDoc: function(options) {
-	      if (!options) options = {};
-	      var from = this.first, to = this.first + this.size;
-	      if (options.from != null && options.from > from) from = options.from;
-	      if (options.to != null && options.to < to) to = options.to;
-	      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep);
-	      if (options.sharedHist) copy.history = this.history;
-	      (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
-	      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
-	      copySharedMarkers(copy, findSharedMarkers(this));
-	      return copy;
-	    },
-	    unlinkDoc: function(other) {
-	      if (other instanceof CodeMirror) other = other.doc;
-	      if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
-	        var link = this.linked[i];
-	        if (link.doc != other) continue;
-	        this.linked.splice(i, 1);
-	        other.unlinkDoc(this);
-	        detachSharedMarkers(findSharedMarkers(this));
-	        break;
-	      }
-	      // If the histories were shared, split them again
-	      if (other.history == this.history) {
-	        var splitIds = [other.id];
-	        linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
-	        other.history = new History(null);
-	        other.history.done = copyHistoryArray(this.history.done, splitIds);
-	        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
-	      }
-	    },
-	    iterLinkedDocs: function(f) {linkedDocs(this, f);},
-
-	    getMode: function() {return this.mode;},
-	    getEditor: function() {return this.cm;},
-
-	    splitLines: function(str) {
-	      if (this.lineSep) return str.split(this.lineSep);
-	      return splitLinesAuto(str);
-	    },
-	    lineSeparator: function() { return this.lineSep || "\n"; }
-	  });
-
-	  // Public alias.
-	  Doc.prototype.eachLine = Doc.prototype.iter;
-
-	  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
-	  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
-	  for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
-	    CodeMirror.prototype[prop] = (function(method) {
-	      return function() {return method.apply(this.doc, arguments);};
-	    })(Doc.prototype[prop]);
-
-	  eventMixin(Doc);
-
-	  // Call f for all linked documents.
-	  function linkedDocs(doc, f, sharedHistOnly) {
-	    function propagate(doc, skip, sharedHist) {
-	      if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
-	        var rel = doc.linked[i];
-	        if (rel.doc == skip) continue;
-	        var shared = sharedHist && rel.sharedHist;
-	        if (sharedHistOnly && !shared) continue;
-	        f(rel.doc, shared);
-	        propagate(rel.doc, doc, shared);
-	      }
-	    }
-	    propagate(doc, null, true);
-	  }
-
-	  // Attach a document to an editor.
-	  function attachDoc(cm, doc) {
-	    if (doc.cm) throw new Error("This document is already in use.");
-	    cm.doc = doc;
-	    doc.cm = cm;
-	    estimateLineHeights(cm);
-	    loadMode(cm);
-	    if (!cm.options.lineWrapping) findMaxLine(cm);
-	    cm.options.mode = doc.modeOption;
-	    regChange(cm);
-	  }
-
-	  // LINE UTILITIES
-
-	  // Find the line object corresponding to the given line number.
-	  function getLine(doc, n) {
-	    n -= doc.first;
-	    if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.first) + " in the document.");
-	    for (var chunk = doc; !chunk.lines;) {
-	      for (var i = 0;; ++i) {
-	        var child = chunk.children[i], sz = child.chunkSize();
-	        if (n < sz) { chunk = child; break; }
-	        n -= sz;
-	      }
-	    }
-	    return chunk.lines[n];
-	  }
-
-	  // Get the part of a document between two positions, as an array of
-	  // strings.
-	  function getBetween(doc, start, end) {
-	    var out = [], n = start.line;
-	    doc.iter(start.line, end.line + 1, function(line) {
-	      var text = line.text;
-	      if (n == end.line) text = text.slice(0, end.ch);
-	      if (n == start.line) text = text.slice(start.ch);
-	      out.push(text);
-	      ++n;
-	    });
-	    return out;
-	  }
-	  // Get the lines between from and to, as array of strings.
-	  function getLines(doc, from, to) {
-	    var out = [];
-	    doc.iter(from, to, function(line) { out.push(line.text); });
-	    return out;
-	  }
-
-	  // Update the height of a line, propagating the height change
-	  // upwards to parent nodes.
-	  function updateLineHeight(line, height) {
-	    var diff = height - line.height;
-	    if (diff) for (var n = line; n; n = n.parent) n.height += diff;
-	  }
-
-	  // Given a line object, find its line number by walking up through
-	  // its parent links.
-	  function lineNo(line) {
-	    if (line.parent == null) return null;
-	    var cur = line.parent, no = indexOf(cur.lines, line);
-	    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
-	      for (var i = 0;; ++i) {
-	        if (chunk.children[i] == cur) break;
-	        no += chunk.children[i].chunkSize();
-	      }
-	    }
-	    return no + cur.first;
-	  }
-
-	  // Find the line at the given vertical position, using the height
-	  // information in the document tree.
-	  function lineAtHeight(chunk, h) {
-	    var n = chunk.first;
-	    outer: do {
-	      for (var i = 0; i < chunk.children.length; ++i) {
-	        var child = chunk.children[i], ch = child.height;
-	        if (h < ch) { chunk = child; continue outer; }
-	        h -= ch;
-	        n += child.chunkSize();
-	      }
-	      return n;
-	    } while (!chunk.lines);
-	    for (var i = 0; i < chunk.lines.length; ++i) {
-	      var line = chunk.lines[i], lh = line.height;
-	      if (h < lh) break;
-	      h -= lh;
-	    }
-	    return n + i;
-	  }
-
-
-	  // Find the height above the given line.
-	  function heightAtLine(lineObj) {
-	    lineObj = visualLine(lineObj);
-
-	    var h = 0, chunk = lineObj.parent;
-	    for (var i = 0; i < chunk.lines.length; ++i) {
-	      var line = chunk.lines[i];
-	      if (line == lineObj) break;
-	      else h += line.height;
-	    }
-	    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
-	      for (var i = 0; i < p.children.length; ++i) {
-	        var cur = p.children[i];
-	        if (cur == chunk) break;
-	        else h += cur.height;
-	      }
-	    }
-	    return h;
-	  }
-
-	  // Get the bidi ordering for the given line (and cache it). Returns
-	  // false for lines that are fully left-to-right, and an array of
-	  // BidiSpan objects otherwise.
-	  function getOrder(line) {
-	    var order = line.order;
-	    if (order == null) order = line.order = bidiOrdering(line.text);
-	    return order;
-	  }
-
-	  // HISTORY
-
-	  function History(startGen) {
-	    // Arrays of change events and selections. Doing something adds an
-	    // event to done and clears undo. Undoing moves events from done
-	    // to undone, redoing moves them in the other direction.
-	    this.done = []; this.undone = [];
-	    this.undoDepth = Infinity;
-	    // Used to track when changes can be merged into a single undo
-	    // event
-	    this.lastModTime = this.lastSelTime = 0;
-	    this.lastOp = this.lastSelOp = null;
-	    this.lastOrigin = this.lastSelOrigin = null;
-	    // Used by the isClean() method
-	    this.generation = this.maxGeneration = startGen || 1;
-	  }
-
-	  // Create a history change event from an updateDoc-style change
-	  // object.
-	  function historyChangeFromChange(doc, change) {
-	    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
-	    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
-	    linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
-	    return histChange;
-	  }
-
-	  // Pop all selection events off the end of a history array. Stop at
-	  // a change event.
-	  function clearSelectionEvents(array) {
-	    while (array.length) {
-	      var last = lst(array);
-	      if (last.ranges) array.pop();
-	      else break;
-	    }
-	  }
-
-	  // Find the top change event in the history. Pop off selection
-	  // events that are in the way.
-	  function lastChangeEvent(hist, force) {
-	    if (force) {
-	      clearSelectionEvents(hist.done);
-	      return lst(hist.done);
-	    } else if (hist.done.length && !lst(hist.done).ranges) {
-	      return lst(hist.done);
-	    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
-	      hist.done.pop();
-	      return lst(hist.done);
-	    }
-	  }
-
-	  // Register a change in the history. Merges changes that are within
-	  // a single operation, ore are close together with an origin that
-	  // allows merging (starting with "+") into a single event.
-	  function addChangeToHistory(doc, change, selAfter, opId) {
-	    var hist = doc.history;
-	    hist.undone.length = 0;
-	    var time = +new Date, cur;
-
-	    if ((hist.lastOp == opId ||
-	         hist.lastOrigin == change.origin && change.origin &&
-	         ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
-	          change.origin.charAt(0) == "*")) &&
-	        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
-	      // Merge this change into the last event
-	      var last = lst(cur.changes);
-	      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
-	        // Optimized case for simple insertion -- don't want to add
-	        // new changesets for every character typed
-	        last.to = changeEnd(change);
-	      } else {
-	        // Add new sub-event
-	        cur.changes.push(historyChangeFromChange(doc, change));
+	      var ranges = copyableRanges(cm)
+	      setLastCopied({lineWise: true, text: ranges.text})
+	      if (e.type == "cut") {
+	        cm.operation(function () {
+	          cm.setSelections(ranges.ranges, 0, sel_dontScroll)
+	          cm.replaceSelection("", null, "cut")
+	        })
+	      }
+	    }
+	    if (e.clipboardData) {
+	      e.clipboardData.clearData()
+	      var content = lastCopied.text.join("\n")
+	      // iOS exposes the clipboard API, but seems to discard content inserted into it
+	      e.clipboardData.setData("Text", content)
+	      if (e.clipboardData.getData("Text") == content) {
+	        e.preventDefault()
+	        return
+	      }
+	    }
+	    // Old-fashioned briefly-focus-a-textarea hack
+	    var kludge = hiddenTextarea(), te = kludge.firstChild
+	    cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
+	    te.value = lastCopied.text.join("\n")
+	    var hadFocus = document.activeElement
+	    selectInput(te)
+	    setTimeout(function () {
+	      cm.display.lineSpace.removeChild(kludge)
+	      hadFocus.focus()
+	      if (hadFocus == div) { input.showPrimarySelection() }
+	    }, 50)
+	  }
+	  on(div, "copy", onCopyCut)
+	  on(div, "cut", onCopyCut)
+	};
+
+	ContentEditableInput.prototype.prepareSelection = function () {
+	  var result = prepareSelection(this.cm, false)
+	  result.focus = this.cm.state.focused
+	  return result
+	};
+
+	ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+	  if (!info || !this.cm.display.view.length) { return }
+	  if (info.focus || takeFocus) { this.showPrimarySelection() }
+	  this.showMultipleSelections(info)
+	};
+
+	ContentEditableInput.prototype.showPrimarySelection = function () {
+	  var sel = window.getSelection(), cm = this.cm, prim = cm.doc.sel.primary()
+	  var from = prim.from(), to = prim.to()
+
+	  if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+	    sel.removeAllRanges()
+	    return
+	  }
+
+	  var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+	  var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset)
+	  if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+	      cmp(minPos(curAnchor, curFocus), from) == 0 &&
+	      cmp(maxPos(curAnchor, curFocus), to) == 0)
+	    { return }
+
+	  var view = cm.display.view
+	  var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+	      {node: view[0].measure.map[2], offset: 0}
+	  var end = to.line < cm.display.viewTo && posToDOM(cm, to)
+	  if (!end) {
+	    var measure = view[view.length - 1].measure
+	    var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
+	    end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}
+	  }
+
+	  if (!start || !end) {
+	    sel.removeAllRanges()
+	    return
+	  }
+
+	  var old = sel.rangeCount && sel.getRangeAt(0), rng
+	  try { rng = range(start.node, start.offset, end.offset, end.node) }
+	  catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+	  if (rng) {
+	    if (!gecko && cm.state.focused) {
+	      sel.collapse(start.node, start.offset)
+	      if (!rng.collapsed) {
+	        sel.removeAllRanges()
+	        sel.addRange(rng)
 	      }
 	    } else {
-	      // Can not be merged, start a new event.
-	      var before = lst(hist.done);
-	      if (!before || !before.ranges)
-	        pushSelectionToHistory(doc.sel, hist.done);
-	      cur = {changes: [historyChangeFromChange(doc, change)],
-	             generation: hist.generation};
-	      hist.done.push(cur);
-	      while (hist.done.length > hist.undoDepth) {
-	        hist.done.shift();
-	        if (!hist.done[0].ranges) hist.done.shift();
-	      }
-	    }
-	    hist.done.push(selAfter);
-	    hist.generation = ++hist.maxGeneration;
-	    hist.lastModTime = hist.lastSelTime = time;
-	    hist.lastOp = hist.lastSelOp = opId;
-	    hist.lastOrigin = hist.lastSelOrigin = change.origin;
-
-	    if (!last) signal(doc, "historyAdded");
-	  }
-
-	  function selectionEventCanBeMerged(doc, origin, prev, sel) {
-	    var ch = origin.charAt(0);
-	    return ch == "*" ||
-	      ch == "+" &&
-	      prev.ranges.length == sel.ranges.length &&
-	      prev.somethingSelected() == sel.somethingSelected() &&
-	      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500);
-	  }
-
-	  // Called whenever the selection changes, sets the new selection as
-	  // the pending selection in the history, and pushes the old pending
-	  // selection into the 'done' array when it was significantly
-	  // different (in number of selected ranges, emptiness, or time).
-	  function addSelectionToHistory(doc, sel, opId, options) {
-	    var hist = doc.history, origin = options && options.origin;
-
-	    // A new event is started when the previous origin does not match
-	    // the current, or the origins don't allow matching. Origins
-	    // starting with * are always merged, those starting with + are
-	    // merged when similar and close together in time.
-	    if (opId == hist.lastSelOp ||
-	        (origin && hist.lastSelOrigin == origin &&
-	         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
-	          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
-	      hist.done[hist.done.length - 1] = sel;
+	      sel.removeAllRanges()
+	      sel.addRange(rng)
+	    }
+	    if (old && sel.anchorNode == null) { sel.addRange(old) }
+	    else if (gecko) { this.startGracePeriod() }
+	  }
+	  this.rememberSelection()
+	};
+
+	ContentEditableInput.prototype.startGracePeriod = function () {
+	    var this$1 = this;
+
+	  clearTimeout(this.gracePeriod)
+	  this.gracePeriod = setTimeout(function () {
+	    this$1.gracePeriod = false
+	    if (this$1.selectionChanged())
+	      { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }) }
+	  }, 20)
+	};
+
+	ContentEditableInput.prototype.showMultipleSelections = function (info) {
+	  removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
+	  removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
+	};
+
+	ContentEditableInput.prototype.rememberSelection = function () {
+	  var sel = window.getSelection()
+	  this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
+	  this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
+	};
+
+	ContentEditableInput.prototype.selectionInEditor = function () {
+	  var sel = window.getSelection()
+	  if (!sel.rangeCount) { return false }
+	  var node = sel.getRangeAt(0).commonAncestorContainer
+	  return contains(this.div, node)
+	};
+
+	ContentEditableInput.prototype.focus = function () {
+	  if (this.cm.options.readOnly != "nocursor") {
+	    if (!this.selectionInEditor())
+	      { this.showSelection(this.prepareSelection(), true) }
+	    this.div.focus()
+	  }
+	};
+	ContentEditableInput.prototype.blur = function () { this.div.blur() };
+	ContentEditableInput.prototype.getField = function () { return this.div };
+
+	ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+	ContentEditableInput.prototype.receivedFocus = function () {
+	  var input = this
+	  if (this.selectionInEditor())
+	    { this.pollSelection() }
+	  else
+	    { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }) }
+
+	  function poll() {
+	    if (input.cm.state.focused) {
+	      input.pollSelection()
+	      input.polling.set(input.cm.options.pollInterval, poll)
+	    }
+	  }
+	  this.polling.set(this.cm.options.pollInterval, poll)
+	};
+
+	ContentEditableInput.prototype.selectionChanged = function () {
+	  var sel = window.getSelection()
+	  return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+	    sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+	};
+
+	ContentEditableInput.prototype.pollSelection = function () {
+	  if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+	  var sel = window.getSelection(), cm = this.cm
+	  // On Android Chrome (version 56, at least), backspacing into an
+	  // uneditable block element will put the cursor in that element,
+	  // and then, because it's not editable, hide the virtual keyboard.
+	  // Because Android doesn't allow us to actually detect backspace
+	  // presses in a sane way, this code checks for when that happens
+	  // and simulates a backspace press in this case.
+	  if (android && chrome && this.cm.options.gutters.length && isInGutter(sel.anchorNode)) {
+	    this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs})
+	    this.blur()
+	    this.focus()
+	    return
+	  }
+	  if (this.composing) { return }
+	  this.rememberSelection()
+	  var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+	  var head = domToPos(cm, sel.focusNode, sel.focusOffset)
+	  if (anchor && head) { runInOp(cm, function () {
+	    setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
+	    if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true }
+	  }) }
+	};
+
+	ContentEditableInput.prototype.pollContent = function () {
+	  if (this.readDOMTimeout != null) {
+	    clearTimeout(this.readDOMTimeout)
+	    this.readDOMTimeout = null
+	  }
+
+	  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
+	  var from = sel.from(), to = sel.to()
+	  if (from.ch == 0 && from.line > cm.firstLine())
+	    { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length) }
+	  if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+	    { to = Pos(to.line + 1, 0) }
+	  if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+	  var fromIndex, fromLine, fromNode
+	  if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+	    fromLine = lineNo(display.view[0].line)
+	    fromNode = display.view[0].node
+	  } else {
+	    fromLine = lineNo(display.view[fromIndex].line)
+	    fromNode = display.view[fromIndex - 1].node.nextSibling
+	  }
+	  var toIndex = findViewIndex(cm, to.line)
+	  var toLine, toNode
+	  if (toIndex == display.view.length - 1) {
+	    toLine = display.viewTo - 1
+	    toNode = display.lineDiv.lastChild
+	  } else {
+	    toLine = lineNo(display.view[toIndex + 1].line) - 1
+	    toNode = display.view[toIndex + 1].node.previousSibling
+	  }
+
+	  if (!fromNode) { return false }
+	  var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
+	  var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
+	  while (newText.length > 1 && oldText.length > 1) {
+	    if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
+	    else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
+	    else { break }
+	  }
+
+	  var cutFront = 0, cutEnd = 0
+	  var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
+	  while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+	    { ++cutFront }
+	  var newBot = lst(newText), oldBot = lst(oldText)
+	  var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+	                           oldBot.length - (oldText.length == 1 ? cutFront : 0))
+	  while (cutEnd < maxCutEnd &&
+	         newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+	    { ++cutEnd }
+	  // Try to move start of change to start of selection if ambiguous
+	  if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+	    while (cutFront && cutFront > from.ch &&
+	           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+	      cutFront--
+	      cutEnd++
+	    }
+	  }
+
+	  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "")
+	  newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "")
+
+	  var chFrom = Pos(fromLine, cutFront)
+	  var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
+	  if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+	    replaceRange(cm.doc, newText, chFrom, chTo, "+input")
+	    return true
+	  }
+	};
+
+	ContentEditableInput.prototype.ensurePolled = function () {
+	  this.forceCompositionEnd()
+	};
+	ContentEditableInput.prototype.reset = function () {
+	  this.forceCompositionEnd()
+	};
+	ContentEditableInput.prototype.forceCompositionEnd = function () {
+	  if (!this.composing) { return }
+	  clearTimeout(this.readDOMTimeout)
+	  this.composing = null
+	  this.updateFromDOM()
+	  this.div.blur()
+	  this.div.focus()
+	};
+	ContentEditableInput.prototype.readFromDOMSoon = function () {
+	    var this$1 = this;
+
+	  if (this.readDOMTimeout != null) { return }
+	  this.readDOMTimeout = setTimeout(function () {
+	    this$1.readDOMTimeout = null
+	    if (this$1.composing) {
+	      if (this$1.composing.done) { this$1.composing = null }
+	      else { return }
+	    }
+	    this$1.updateFromDOM()
+	  }, 80)
+	};
+
+	ContentEditableInput.prototype.updateFromDOM = function () {
+	    var this$1 = this;
+
+	  if (this.cm.isReadOnly() || !this.pollContent())
+	    { runInOp(this.cm, function () { return regChange(this$1.cm); }) }
+	};
+
+	ContentEditableInput.prototype.setUneditable = function (node) {
+	  node.contentEditable = "false"
+	};
+
+	ContentEditableInput.prototype.onKeyPress = function (e) {
+	  if (e.charCode == 0) { return }
+	  e.preventDefault()
+	  if (!this.cm.isReadOnly())
+	    { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0) }
+	};
+
+	ContentEditableInput.prototype.readOnlyChanged = function (val) {
+	  this.div.contentEditable = String(val != "nocursor")
+	};
+
+	ContentEditableInput.prototype.onContextMenu = function () {};
+	ContentEditableInput.prototype.resetPosition = function () {};
+
+	ContentEditableInput.prototype.needsContentAttribute = true
+
+	function posToDOM(cm, pos) {
+	  var view = findViewForLine(cm, pos.line)
+	  if (!view || view.hidden) { return null }
+	  var line = getLine(cm.doc, pos.line)
+	  var info = mapFromLineView(view, line, pos.line)
+
+	  var order = getOrder(line, cm.doc.direction), side = "left"
+	  if (order) {
+	    var partPos = getBidiPartAt(order, pos.ch)
+	    side = partPos % 2 ? "right" : "left"
+	  }
+	  var result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
+	  result.offset = result.collapse == "right" ? result.end : result.start
+	  return result
+	}
+
+	function isInGutter(node) {
+	  for (var scan = node; scan; scan = scan.parentNode)
+	    { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+	  return false
+	}
+
+	function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+	function domTextBetween(cm, from, to, fromLine, toLine) {
+	  var text = "", closing = false, lineSep = cm.doc.lineSeparator()
+	  function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+	  function close() {
+	    if (closing) {
+	      text += lineSep
+	      closing = false
+	    }
+	  }
+	  function addText(str) {
+	    if (str) {
+	      close()
+	      text += str
+	    }
+	  }
+	  function walk(node) {
+	    if (node.nodeType == 1) {
+	      var cmText = node.getAttribute("cm-text")
+	      if (cmText != null) {
+	        addText(cmText || node.textContent.replace(/\u200b/g, ""))
+	        return
+	      }
+	      var markerID = node.getAttribute("cm-marker"), range
+	      if (markerID) {
+	        var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
+	        if (found.length && (range = found[0].find()))
+	          { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)) }
+	        return
+	      }
+	      if (node.getAttribute("contenteditable") == "false") { return }
+	      var isBlock = /^(pre|div|p)$/i.test(node.nodeName)
+	      if (isBlock) { close() }
+	      for (var i = 0; i < node.childNodes.length; i++)
+	        { walk(node.childNodes[i]) }
+	      if (isBlock) { closing = true }
+	    } else if (node.nodeType == 3) {
+	      addText(node.nodeValue)
+	    }
+	  }
+	  for (;;) {
+	    walk(from)
+	    if (from == to) { break }
+	    from = from.nextSibling
+	  }
+	  return text
+	}
+
+	function domToPos(cm, node, offset) {
+	  var lineNode
+	  if (node == cm.display.lineDiv) {
+	    lineNode = cm.display.lineDiv.childNodes[offset]
+	    if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+	    node = null; offset = 0
+	  } else {
+	    for (lineNode = node;; lineNode = lineNode.parentNode) {
+	      if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+	      if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+	    }
+	  }
+	  for (var i = 0; i < cm.display.view.length; i++) {
+	    var lineView = cm.display.view[i]
+	    if (lineView.node == lineNode)
+	      { return locateNodeInLineView(lineView, node, offset) }
+	  }
+	}
+
+	function locateNodeInLineView(lineView, node, offset) {
+	  var wrapper = lineView.text.firstChild, bad = false
+	  if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+	  if (node == wrapper) {
+	    bad = true
+	    node = wrapper.childNodes[offset]
+	    offset = 0
+	    if (!node) {
+	      var line = lineView.rest ? lst(lineView.rest) : lineView.line
+	      return badPos(Pos(lineNo(line), line.text.length), bad)
+	    }
+	  }
+
+	  var textNode = node.nodeType == 3 ? node : null, topNode = node
+	  if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+	    textNode = node.firstChild
+	    if (offset) { offset = textNode.nodeValue.length }
+	  }
+	  while (topNode.parentNode != wrapper) { topNode = topNode.parentNode }
+	  var measure = lineView.measure, maps = measure.maps
+
+	  function find(textNode, topNode, offset) {
+	    for (var i = -1; i < (maps ? maps.length : 0); i++) {
+	      var map = i < 0 ? measure.map : maps[i]
+	      for (var j = 0; j < map.length; j += 3) {
+	        var curNode = map[j + 2]
+	        if (curNode == textNode || curNode == topNode) {
+	          var line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
+	          var ch = map[j] + offset
+	          if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)] }
+	          return Pos(line, ch)
+	        }
+	      }
+	    }
+	  }
+	  var found = find(textNode, topNode, offset)
+	  if (found) { return badPos(found, bad) }
+
+	  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+	  for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+	    found = find(after, after.firstChild, 0)
+	    if (found)
+	      { return badPos(Pos(found.line, found.ch - dist), bad) }
 	    else
-	      pushSelectionToHistory(sel, hist.done);
-
-	    hist.lastSelTime = +new Date;
-	    hist.lastSelOrigin = origin;
-	    hist.lastSelOp = opId;
-	    if (options && options.clearRedo !== false)
-	      clearSelectionEvents(hist.undone);
-	  }
-
-	  function pushSelectionToHistory(sel, dest) {
-	    var top = lst(dest);
-	    if (!(top && top.ranges && top.equals(sel)))
-	      dest.push(sel);
-	  }
-
-	  // Used to store marked span information in the history.
-	  function attachLocalSpans(doc, change, from, to) {
-	    var existing = change["spans_" + doc.id], n = 0;
-	    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
-	      if (line.markedSpans)
-	        (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
-	      ++n;
-	    });
-	  }
-
-	  // When un/re-doing restores text containing marked spans, those
-	  // that have been explicitly cleared should not be restored.
-	  function removeClearedSpans(spans) {
-	    if (!spans) return null;
-	    for (var i = 0, out; i < spans.length; ++i) {
-	      if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
-	      else if (out) out.push(spans[i]);
-	    }
-	    return !out ? spans : out.length ? out : null;
-	  }
-
-	  // Retrieve and filter the old marked spans stored in a change event.
-	  function getOldSpans(doc, change) {
-	    var found = change["spans_" + doc.id];
-	    if (!found) return null;
-	    for (var i = 0, nw = []; i < change.text.length; ++i)
-	      nw.push(removeClearedSpans(found[i]));
-	    return nw;
-	  }
-
-	  // Used both to provide a JSON-safe object in .getHistory, and, when
-	  // detaching a document, to split the history in two
-	  function copyHistoryArray(events, newGroup, instantiateSel) {
-	    for (var i = 0, copy = []; i < events.length; ++i) {
-	      var event = events[i];
-	      if (event.ranges) {
-	        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
-	        continue;
-	      }
-	      var changes = event.changes, newChanges = [];
-	      copy.push({changes: newChanges});
-	      for (var j = 0; j < changes.length; ++j) {
-	        var change = changes[j], m;
-	        newChanges.push({from: change.from, to: change.to, text: change.text});
-	        if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
-	          if (indexOf(newGroup, Number(m[1])) > -1) {
-	            lst(newChanges)[prop] = change[prop];
-	            delete change[prop];
-	          }
-	        }
-	      }
-	    }
-	    return copy;
-	  }
-
-	  // Rebasing/resetting history to deal with externally-sourced changes
-
-	  function rebaseHistSelSingle(pos, from, to, diff) {
-	    if (to < pos.line) {
-	      pos.line += diff;
-	    } else if (from < pos.line) {
-	      pos.line = from;
-	      pos.ch = 0;
-	    }
-	  }
-
-	  // Tries to rebase an array of history events given a change in the
-	  // document. If the change touches the same lines as the event, the
-	  // event, and everything 'behind' it, is discarded. If the change is
-	  // before the event, the event's positions are updated. Uses a
-	  // copy-on-write scheme for the positions, to avoid having to
-	  // reallocate them all on every rebase, but also avoid problems with
-	  // shared position objects being unsafely updated.
-	  function rebaseHistArray(array, from, to, diff) {
-	    for (var i = 0; i < array.length; ++i) {
-	      var sub = array[i], ok = true;
-	      if (sub.ranges) {
-	        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
-	        for (var j = 0; j < sub.ranges.length; j++) {
-	          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
-	          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
-	        }
-	        continue;
-	      }
-	      for (var j = 0; j < sub.changes.length; ++j) {
-	        var cur = sub.changes[j];
-	        if (to < cur.from.line) {
-	          cur.from = Pos(cur.from.line + diff, cur.from.ch);
-	          cur.to = Pos(cur.to.line + diff, cur.to.ch);
-	        } else if (from <= cur.to.line) {
-	          ok = false;
-	          break;
-	        }
-	      }
-	      if (!ok) {
-	        array.splice(0, i + 1);
-	        i = 0;
-	      }
-	    }
-	  }
-
-	  function rebaseHist(hist, change) {
-	    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
-	    rebaseHistArray(hist.done, from, to, diff);
-	    rebaseHistArray(hist.undone, from, to, diff);
-	  }
-
-	  // EVENT UTILITIES
-
-	  // Due to the fact that we still support jurassic IE versions, some
-	  // compatibility wrappers are needed.
-
-	  var e_preventDefault = CodeMirror.e_preventDefault = function(e) {
-	    if (e.preventDefault) e.preventDefault();
-	    else e.returnValue = false;
-	  };
-	  var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) {
-	    if (e.stopPropagation) e.stopPropagation();
-	    else e.cancelBubble = true;
-	  };
-	  function e_defaultPrevented(e) {
-	    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
-	  }
-	  var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropagation(e);};
-
-	  function e_target(e) {return e.target || e.srcElement;}
-	  function e_button(e) {
-	    var b = e.which;
-	    if (b == null) {
-	      if (e.button & 1) b = 1;
-	      else if (e.button & 2) b = 3;
-	      else if (e.button & 4) b = 2;
-	    }
-	    if (mac && e.ctrlKey && b == 1) b = 3;
-	    return b;
-	  }
-
-	  // EVENT HANDLING
-
-	  // Lightweight event framework. on/off also work on DOM nodes,
-	  // registering native DOM handlers.
-
-	  var on = CodeMirror.on = function(emitter, type, f) {
-	    if (emitter.addEventListener)
-	      emitter.addEventListener(type, f, false);
-	    else if (emitter.attachEvent)
-	      emitter.attachEvent("on" + type, f);
-	    else {
-	      var map = emitter._handlers || (emitter._handlers = {});
-	      var arr = map[type] || (map[type] = []);
-	      arr.push(f);
-	    }
-	  };
-
-	  var noHandlers = []
-	  function getHandlers(emitter, type, copy) {
-	    var arr = emitter._handlers && emitter._handlers[type]
-	    if (copy) return arr && arr.length > 0 ? arr.slice() : noHandlers
-	    else return arr || noHandlers
-	  }
-
-	  var off = CodeMirror.off = function(emitter, type, f) {
-	    if (emitter.removeEventListener)
-	      emitter.removeEventListener(type, f, false);
-	    else if (emitter.detachEvent)
-	      emitter.detachEvent("on" + type, f);
-	    else {
-	      var handlers = getHandlers(emitter, type, false)
-	      for (var i = 0; i < handlers.length; ++i)
-	        if (handlers[i] == f) { handlers.splice(i, 1); break; }
-	    }
-	  };
-
-	  var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
-	    var handlers = getHandlers(emitter, type, true)
-	    if (!handlers.length) return;
-	    var args = Array.prototype.slice.call(arguments, 2);
-	    for (var i = 0; i < handlers.length; ++i) handlers[i].apply(null, args);
-	  };
-
-	  var orphanDelayedCallbacks = null;
-
-	  // Often, we want to signal events at a point where we are in the
-	  // middle of some work, but don't want the handler to start calling
-	  // other methods on the editor, which might be in an inconsistent
-	  // state or simply not expect any other events to happen.
-	  // signalLater looks whether there are any handlers, and schedules
-	  // them to be executed when the last operation ends, or, if no
-	  // operation is active, when a timeout fires.
-	  function signalLater(emitter, type /*, values...*/) {
-	    var arr = getHandlers(emitter, type, false)
-	    if (!arr.length) return;
-	    var args = Array.prototype.slice.call(arguments, 2), list;
-	    if (operationGroup) {
-	      list = operationGroup.delayedCallbacks;
-	    } else if (orphanDelayedCallbacks) {
-	      list = orphanDelayedCallbacks;
-	    } else {
-	      list = orphanDelayedCallbacks = [];
-	      setTimeout(fireOrphanDelayed, 0);
-	    }
-	    function bnd(f) {return function(){f.apply(null, args);};};
-	    for (var i = 0; i < arr.length; ++i)
-	      list.push(bnd(arr[i]));
-	  }
-
-	  function fireOrphanDelayed() {
-	    var delayed = orphanDelayedCallbacks;
-	    orphanDelayedCallbacks = null;
-	    for (var i = 0; i < delayed.length; ++i) delayed[i]();
-	  }
-
-	  // The DOM events that CodeMirror handles can be overridden by
-	  // registering a (non-DOM) handler on the editor for the event name,
-	  // and preventDefault-ing the event in that handler.
-	  function signalDOMEvent(cm, e, override) {
-	    if (typeof e == "string")
-	      e = {type: e, preventDefault: function() { this.defaultPrevented = true; }};
-	    signal(cm, override || e.type, cm, e);
-	    return e_defaultPrevented(e) || e.codemirrorIgnore;
-	  }
-
-	  function signalCursorActivity(cm) {
-	    var arr = cm._handlers && cm._handlers.cursorActivity;
-	    if (!arr) return;
-	    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
-	    for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1)
-	      set.push(arr[i]);
-	  }
-
-	  function hasHandler(emitter, type) {
-	    return getHandlers(emitter, type).length > 0
-	  }
-
-	  // Add on and off methods to a constructor's prototype, to make
-	  // registering events on such objects more convenient.
-	  function eventMixin(ctor) {
-	    ctor.prototype.on = function(type, f) {on(this, type, f);};
-	    ctor.prototype.off = function(type, f) {off(this, type, f);};
-	  }
-
-	  // MISC UTILITIES
-
-	  // Number of pixels added to scroller and sizer to hide scrollbar
-	  var scrollerGap = 30;
-
-	  // Returned or thrown by various protocols to signal 'I'm not
-	  // handling this'.
-	  var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
-
-	  // Reused option objects for setSelection & friends
-	  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
-
-	  function Delayed() {this.id = null;}
-	  Delayed.prototype.set = function(ms, f) {
-	    clearTimeout(this.id);
-	    this.id = setTimeout(f, ms);
-	  };
-
-	  // Counts the column offset in a string, taking tabs into account.
-	  // Used mostly to find indentation.
-	  var countColumn = CodeMirror.countColumn = function(string, end, tabSize, startIndex, startValue) {
-	    if (end == null) {
-	      end = string.search(/[^\s\u00a0]/);
-	      if (end == -1) end = string.length;
-	    }
-	    for (var i = startIndex || 0, n = startValue || 0;;) {
-	      var nextTab = string.indexOf("\t", i);
-	      if (nextTab < 0 || nextTab >= end)
-	        return n + (end - i);
-	      n += nextTab - i;
-	      n += tabSize - (n % tabSize);
-	      i = nextTab + 1;
-	    }
-	  };
-
-	  // The inverse of countColumn -- find the offset that corresponds to
-	  // a particular column.
-	  var findColumn = CodeMirror.findColumn = function(string, goal, tabSize) {
-	    for (var pos = 0, col = 0;;) {
-	      var nextTab = string.indexOf("\t", pos);
-	      if (nextTab == -1) nextTab = string.length;
-	      var skipped = nextTab - pos;
-	      if (nextTab == string.length || col + skipped >= goal)
-	        return pos + Math.min(skipped, goal - col);
-	      col += nextTab - pos;
-	      col += tabSize - (col % tabSize);
-	      pos = nextTab + 1;
-	      if (col >= goal) return pos;
-	    }
-	  }
-
-	  var spaceStrs = [""];
-	  function spaceStr(n) {
-	    while (spaceStrs.length <= n)
-	      spaceStrs.push(lst(spaceStrs) + " ");
-	    return spaceStrs[n];
-	  }
-
-	  function lst(arr) { return arr[arr.length-1]; }
-
-	  var selectInput = function(node) { node.select(); };
-	  if (ios) // Mobile Safari apparently has a bug where select() is broken.
-	    selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; };
-	  else if (ie) // Suppress mysterious IE10 errors
-	    selectInput = function(node) { try { node.select(); } catch(_e) {} };
-
-	  function indexOf(array, elt) {
-	    for (var i = 0; i < array.length; ++i)
-	      if (array[i] == elt) return i;
-	    return -1;
-	  }
-	  function map(array, f) {
-	    var out = [];
-	    for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
-	    return out;
-	  }
-
-	  function nothing() {}
-
-	  function createObj(base, props) {
-	    var inst;
-	    if (Object.create) {
-	      inst = Object.create(base);
+	      { dist += after.textContent.length }
+	  }
+	  for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+	    found = find(before, before.firstChild, -1)
+	    if (found)
+	      { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+	    else
+	      { dist$1 += before.textContent.length }
+	  }
+	}
+
+	// TEXTAREA INPUT STYLE
+
+	var TextareaInput = function(cm) {
+	  this.cm = cm
+	  // See input.poll and input.reset
+	  this.prevInput = ""
+
+	  // Flag that indicates whether we expect input to appear real soon
+	  // now (after some event like 'keypress' or 'input') and are
+	  // polling intensively.
+	  this.pollingFast = false
+	  // Self-resetting timeout for the poller
+	  this.polling = new Delayed()
+	  // Tracks when input.reset has punted to just putting a short
+	  // string into the textarea instead of the full selection.
+	  this.inaccurateSelection = false
+	  // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+	  this.hasSelection = false
+	  this.composing = null
+	};
+
+	TextareaInput.prototype.init = function (display) {
+	    var this$1 = this;
+
+	  var input = this, cm = this.cm
+
+	  // Wraps and hides input textarea
+	  var div = this.wrapper = hiddenTextarea()
+	  // The semihidden textarea that is focused when the editor is
+	  // focused, and receives input.
+	  var te = this.textarea = div.firstChild
+	  display.wrapper.insertBefore(div, display.wrapper.firstChild)
+
+	  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+	  if (ios) { te.style.width = "0px" }
+
+	  on(te, "input", function () {
+	    if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null }
+	    input.poll()
+	  })
+
+	  on(te, "paste", function (e) {
+	    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+	    cm.state.pasteIncoming = true
+	    input.fastPoll()
+	  })
+
+	  function prepareCopyCut(e) {
+	    if (signalDOMEvent(cm, e)) { return }
+	    if (cm.somethingSelected()) {
+	      setLastCopied({lineWise: false, text: cm.getSelections()})
+	      if (input.inaccurateSelection) {
+	        input.prevInput = ""
+	        input.inaccurateSelection = false
+	        te.value = lastCopied.text.join("\n")
+	        selectInput(te)
+	      }
+	    } else if (!cm.options.lineWiseCopyCut) {
+	      return
 	    } else {
-	      nothing.prototype = base;
-	      inst = new nothing();
-	    }
-	    if (props) copyObj(props, inst);
-	    return inst;
-	  };
-
-	  function copyObj(obj, target, overwrite) {
-	    if (!target) target = {};
-	    for (var prop in obj)
-	      if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
-	        target[prop] = obj[prop];
-	    return target;
-	  }
-
-	  function bind(f) {
-	    var args = Array.prototype.slice.call(arguments, 1);
-	    return function(){return f.apply(null, args);};
-	  }
-
-	  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
-	  var isWordCharBasic = CodeMirror.isWordChar = function(ch) {
-	    return /\w/.test(ch) || ch > "\x80" &&
-	      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
-	  };
-	  function isWordChar(ch, helper) {
-	    if (!helper) return isWordCharBasic(ch);
-	    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) return true;
-	    return helper.test(ch);
-	  }
-
-	  function isEmpty(obj) {
-	    for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
-	    return true;
-	  }
-
-	  // Extending unicode characters. A series of a non-extending char +
-	  // any number of extending chars is treated as a single unit as far
-	  // as editing and measuring is concerned. This is not fully correct,
-	  // since some scripts/fonts/browsers also treat other configurations
-	  // of code points as a group.
-	  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
-	  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }
-
-	  // DOM UTILITIES
-
-	  function elt(tag, content, className, style) {
-	    var e = document.createElement(tag);
-	    if (className) e.className = className;
-	    if (style) e.style.cssText = style;
-	    if (typeof content == "string") e.appendChild(document.createTextNode(content));
-	    else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
-	    return e;
-	  }
-
-	  var range;
-	  if (document.createRange) range = function(node, start, end, endNode) {
-	    var r = document.createRange();
-	    r.setEnd(endNode || node, end);
-	    r.setStart(node, start);
-	    return r;
-	  };
-	  else range = function(node, start, end) {
-	    var r = document.body.createTextRange();
-	    try { r.moveToElementText(node.parentNode); }
-	    catch(e) { return r; }
-	    r.collapse(true);
-	    r.moveEnd("character", end);
-	    r.moveStart("character", start);
-	    return r;
-	  };
-
-	  function removeChildren(e) {
-	    for (var count = e.childNodes.length; count > 0; --count)
-	      e.removeChild(e.firstChild);
-	    return e;
-	  }
-
-	  function removeChildrenAndAdd(parent, e) {
-	    return removeChildren(parent).appendChild(e);
-	  }
-
-	  var contains = CodeMirror.contains = function(parent, child) {
-	    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
-	      child = child.parentNode;
-	    if (parent.contains)
-	      return parent.contains(child);
-	    do {
-	      if (child.nodeType == 11) child = child.host;
-	      if (child == parent) return true;
-	    } while (child = child.parentNode);
-	  };
-
-	  function activeElt() {
-	    var activeElement = document.activeElement;
-	    while (activeElement && activeElement.root && activeElement.root.activeElement)
-	      activeElement = activeElement.root.activeElement;
-	    return activeElement;
-	  }
-	  // Older versions of IE throws unspecified error when touching
-	  // document.activeElement in some cases (during loading, in iframe)
-	  if (ie && ie_version < 11) activeElt = function() {
-	    try { return document.activeElement; }
-	    catch(e) { return document.body; }
-	  };
-
-	  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*"); }
-	  var rmClass = CodeMirror.rmClass = function(node, cls) {
-	    var current = node.className;
-	    var match = classTest(cls).exec(current);
-	    if (match) {
-	      var after = current.slice(match.index + match[0].length);
-	      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
-	    }
-	  };
-	  var addClass = CodeMirror.addClass = function(node, cls) {
-	    var current = node.className;
-	    if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls;
-	  };
-	  function joinClasses(a, b) {
-	    var as = a.split(" ");
-	    for (var i = 0; i < as.length; i++)
-	      if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i];
-	    return b;
-	  }
-
-	  // WINDOW-WIDE EVENTS
-
-	  // These must be handled carefully, because naively registering a
-	  // handler for each editor will cause the editors to never be
-	  // garbage collected.
-
-	  function forEachCodeMirror(f) {
-	    if (!document.body.getElementsByClassName) return;
-	    var byClass = document.body.getElementsByClassName("CodeMirror");
-	    for (var i = 0; i < byClass.length; i++) {
-	      var cm = byClass[i].CodeMirror;
-	      if (cm) f(cm);
-	    }
-	  }
-
-	  var globalsRegistered = false;
-	  function ensureGlobalHandlers() {
-	    if (globalsRegistered) return;
-	    registerGlobalHandlers();
-	    globalsRegistered = true;
-	  }
-	  function registerGlobalHandlers() {
-	    // When the window resizes, we need to refresh active editors.
-	    var resizeTimer;
-	    on(window, "resize", function() {
-	      if (resizeTimer == null) resizeTimer = setTimeout(function() {
-	        resizeTimer = null;
-	        forEachCodeMirror(onResize);
-	      }, 100);
-	    });
-	    // When the window loses focus, we want to show the editor as blurred
-	    on(window, "blur", function() {
-	      forEachCodeMirror(onBlur);
-	    });
-	  }
-
-	  // FEATURE DETECTION
-
-	  // Detect drag-and-drop
-	  var dragAndDrop = function() {
-	    // There is *some* kind of drag-and-drop support in IE6-8, but I
-	    // couldn't get it to work yet.
-	    if (ie && ie_version < 9) return false;
-	    var div = elt('div');
-	    return "draggable" in div || "dragDrop" in div;
-	  }();
-
-	  var zwspSupported;
-	  function zeroWidthElement(measure) {
-	    if (zwspSupported == null) {
-	      var test = elt("span", "\u200b");
-	      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
-	      if (measure.firstChild.offsetHeight != 0)
-	        zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8);
-	    }
-	    var node = zwspSupported ? elt("span", "\u200b") :
-	      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
-	    node.setAttribute("cm-text", "");
-	    return node;
-	  }
-
-	  // Feature-detect IE's crummy client rect reporting for bidi text
-	  var badBidiRects;
-	  function hasBadBidiRects(measure) {
-	    if (badBidiRects != null) return badBidiRects;
-	    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
-	    var r0 = range(txt, 0, 1).getBoundingClientRect();
-	    if (!r0 || r0.left == r0.right) return false; // Safari returns null in some cases (#2780)
-	    var r1 = range(txt, 1, 2).getBoundingClientRect();
-	    return badBidiRects = (r1.right - r0.right < 3);
-	  }
-
-	  // See if "".split is the broken IE version, if so, provide an
-	  // alternative way to split lines.
-	  var splitLinesAuto = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
-	    var pos = 0, result = [], l = string.length;
-	    while (pos <= l) {
-	      var nl = string.indexOf("\n", pos);
-	      if (nl == -1) nl = string.length;
-	      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
-	      var rt = line.indexOf("\r");
-	      if (rt != -1) {
-	        result.push(line.slice(0, rt));
-	        pos += rt + 1;
-	      } else {
-	        result.push(line);
-	        pos = nl + 1;
-	      }
-	    }
-	    return result;
-	  } : function(string){return string.split(/\r\n?|\n/);};
-
-	  var hasSelection = window.getSelection ? function(te) {
-	    try { return te.selectionStart != te.selectionEnd; }
-	    catch(e) { return false; }
-	  } : function(te) {
-	    try {var range = te.ownerDocument.selection.createRange();}
-	    catch(e) {}
-	    if (!range || range.parentElement() != te) return false;
-	    return range.compareEndPoints("StartToEnd", range) != 0;
-	  };
-
-	  var hasCopyEvent = (function() {
-	    var e = elt("div");
-	    if ("oncopy" in e) return true;
-	    e.setAttribute("oncopy", "return;");
-	    return typeof e.oncopy == "function";
-	  })();
-
-	  var badZoomedRects = null;
-	  function hasBadZoomedRects(measure) {
-	    if (badZoomedRects != null) return badZoomedRects;
-	    var node = removeChildrenAndAdd(measure, elt("span", "x"));
-	    var normal = node.getBoundingClientRect();
-	    var fromRange = range(node, 0, 1).getBoundingClientRect();
-	    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1;
-	  }
-
-	  // KEY NAMES
-
-	  var keyNames = CodeMirror.keyNames = {
-	    3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
-	    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
-	    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
-	    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
-	    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
-	    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
-	    221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
-	    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
-	  };
-	  (function() {
-	    // Number keys
-	    for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
-	    // Alphabetic keys
-	    for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
-	    // Function keys
-	    for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
-	  })();
-
-	  // BIDI HELPERS
-
-	  function iterateBidiSections(order, from, to, f) {
-	    if (!order) return f(from, to, "ltr");
-	    var found = false;
-	    for (var i = 0; i < order.length; ++i) {
-	      var part = order[i];
-	      if (part.from < to && part.to > from || from == to && part.to == from) {
-	        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
-	        found = true;
-	      }
-	    }
-	    if (!found) f(from, to, "ltr");
-	  }
-
-	  function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
-	  function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
-
-	  function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
-	  function lineRight(line) {
-	    var order = getOrder(line);
-	    if (!order) return line.text.length;
-	    return bidiRight(lst(order));
-	  }
-
-	  function lineStart(cm, lineN) {
-	    var line = getLine(cm.doc, lineN);
-	    var visual = visualLine(line);
-	    if (visual != line) lineN = lineNo(visual);
-	    var order = getOrder(visual);
-	    var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
-	    return Pos(lineN, ch);
-	  }
-	  function lineEnd(cm, lineN) {
-	    var merged, line = getLine(cm.doc, lineN);
-	    while (merged = collapsedSpanAtEnd(line)) {
-	      line = merged.find(1, true).line;
-	      lineN = null;
-	    }
-	    var order = getOrder(line);
-	    var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
-	    return Pos(lineN == null ? lineNo(line) : lineN, ch);
-	  }
-	  function lineStartSmart(cm, pos) {
-	    var start = lineStart(cm, pos.line);
-	    var line = getLine(cm.doc, start.line);
-	    var order = getOrder(line);
-	    if (!order || order[0].level == 0) {
-	      var firstNonWS = Math.max(0, line.text.search(/\S/));
-	      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
-	      return Pos(start.line, inWS ? 0 : firstNonWS);
-	    }
-	    return start;
-	  }
-
-	  function compareBidiLevel(order, a, b) {
-	    var linedir = order[0].level;
-	    if (a == linedir) return true;
-	    if (b == linedir) return false;
-	    return a < b;
-	  }
-	  var bidiOther;
-	  function getBidiPartAt(order, pos) {
-	    bidiOther = null;
-	    for (var i = 0, found; i < order.length; ++i) {
-	      var cur = order[i];
-	      if (cur.from < pos && cur.to > pos) return i;
-	      if ((cur.from == pos || cur.to == pos)) {
-	        if (found == null) {
-	          found = i;
-	        } else if (compareBidiLevel(order, cur.level, order[found].level)) {
-	          if (cur.from != cur.to) bidiOther = found;
-	          return i;
-	        } else {
-	          if (cur.from != cur.to) bidiOther = i;
-	          return found;
-	        }
-	      }
-	    }
-	    return found;
-	  }
-
-	  function moveInLine(line, pos, dir, byUnit) {
-	    if (!byUnit) return pos + dir;
-	    do pos += dir;
-	    while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
-	    return pos;
-	  }
-
-	  // This is needed in order to move 'visually' through bi-directional
-	  // text -- i.e., pressing left should make the cursor go left, even
-	  // when in RTL text. The tricky part is the 'jumps', where RTL and
-	  // LTR text touch each other. This often requires the cursor offset
-	  // to move more than one unit, in order to visually move one unit.
-	  function moveVisually(line, start, dir, byUnit) {
-	    var bidi = getOrder(line);
-	    if (!bidi) return moveLogically(line, start, dir, byUnit);
-	    var pos = getBidiPartAt(bidi, start), part = bidi[pos];
-	    var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
-
-	    for (;;) {
-	      if (target > part.from && target < part.to) return target;
-	      if (target == part.from || target == part.to) {
-	        if (getBidiPartAt(bidi, target) == pos) return target;
-	        part = bidi[pos += dir];
-	        return (dir > 0) == part.level % 2 ? part.to : part.from;
-	      } else {
-	        part = bidi[pos += dir];
-	        if (!part) return null;
-	        if ((dir > 0) == part.level % 2)
-	          target = moveInLine(line, part.to, -1, byUnit);
-	        else
-	          target = moveInLine(line, part.from, 1, byUnit);
-	      }
-	    }
-	  }
-
-	  function moveLogically(line, start, dir, byUnit) {
-	    var target = start + dir;
-	    if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
-	    return target < 0 || target > line.text.length ? null : target;
-	  }
-
-	  // Bidirectional ordering algorithm
-	  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
-	  // that this (partially) implements.
-
-	  // One-char codes used for character types:
-	  // L (L):   Left-to-Right
-	  // R (R):   Right-to-Left
-	  // r (AL):  Right-to-Left Arabic
-	  // 1 (EN):  European Number
-	  // + (ES):  European Number Separator
-	  // % (ET):  European Number Terminator
-	  // n (AN):  Arabic Number
-	  // , (CS):  Common Number Separator
-	  // m (NSM): Non-Spacing Mark
-	  // b (BN):  Boundary Neutral
-	  // s (B):   Paragraph Separator
-	  // t (S):   Segment Separator
-	  // w (WS):  Whitespace
-	  // N (ON):  Other Neutrals
-
-	  // Returns null if characters are ordered as they appear
-	  // (left-to-right), or an array of sections ({from, to, level}
-	  // objects) in the order in which they occur visually.
-	  var bidiOrdering = (function() {
-	    // Character types for codepoints 0 to 0xff
-	    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
-	    // Character types for codepoints 0x600 to 0x6ff
-	    var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm";
-	    function charType(code) {
-	      if (code <= 0xf7) return lowTypes.charAt(code);
-	      else if (0x590 <= code && code <= 0x5f4) return "R";
-	      else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code - 0x600);
-	      else if (0x6ee <= code && code <= 0x8ac) return "r";
-	      else if (0x2000 <= code && code <= 0x200b) return "w";
-	      else if (code == 0x200c) return "b";
-	      else return "L";
-	    }
-
-	    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
-	    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
-	    // Browsers seem to always treat the boundaries of block elements as being L.
-	    var outerType = "L";
-
-	    function BidiSpan(level, from, to) {
-	      this.level = level;
-	      this.from = from; this.to = to;
-	    }
-
-	    return function(str) {
-	      if (!bidiRE.test(str)) return false;
-	      var len = str.length, types = [];
-	      for (var i = 0, type; i < len; ++i)
-	        types.push(type = charType(str.charCodeAt(i)));
-
-	      // W1. Examine each non-spacing mark (NSM) in the level run, and
-	      // change the type of the NSM to the type of the previous
-	      // character. If the NSM is at the start of the level run, it will
-	      // get the type of sor.
-	      for (var i = 0, prev = outerType; i < len; ++i) {
-	        var type = types[i];
-	        if (type == "m") types[i] = prev;
-	        else prev = type;
-	      }
-
-	      // W2. Search backwards from each instance of a European number
-	      // until the first strong type (R, L, AL, or sor) is found. If an
-	      // AL is found, change the type of the European number to Arabic
-	      // number.
-	      // W3. Change all ALs to R.
-	      for (var i = 0, cur = outerType; i < len; ++i) {
-	        var type = types[i];
-	        if (type == "1" && cur == "r") types[i] = "n";
-	        else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
-	      }
-
-	      // W4. A single European separator between two European numbers
-	      // changes to a European number. A single common separator between
-	      // two numbers of the same type changes to that type.
-	      for (var i = 1, prev = types[0]; i < len - 1; ++i) {
-	        var type = types[i];
-	        if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
-	        else if (type == "," && prev == types[i+1] &&
-	                 (prev == "1" || prev == "n")) types[i] = prev;
-	        prev = type;
-	      }
-
-	      // W5. A sequence of European terminators adjacent to European
-	      // numbers changes to all European numbers.
-	      // W6. Otherwise, separators and terminators change to Other
-	      // Neutral.
-	      for (var i = 0; i < len; ++i) {
-	        var type = types[i];
-	        if (type == ",") types[i] = "N";
-	        else if (type == "%") {
-	          for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
-	          var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
-	          for (var j = i; j < end; ++j) types[j] = replace;
-	          i = end - 1;
-	        }
-	      }
-
-	      // W7. Search backwards from each instance of a European number
-	      // until the first strong type (R, L, or sor) is found. If an L is
-	      // found, then change the type of the European number to L.
-	      for (var i = 0, cur = outerType; i < len; ++i) {
-	        var type = types[i];
-	        if (cur == "L" && type == "1") types[i] = "L";
-	        else if (isStrong.test(type)) cur = type;
-	      }
-
-	      // N1. A sequence of neutrals takes the direction of the
-	      // surrounding strong text if the text on both sides has the same
-	      // direction. European and Arabic numbers act as if they were R in
-	      // terms of their influence on neutrals. Start-of-level-run (sor)
-	      // and end-of-level-run (eor) are used at level run boundaries.
-	      // N2. Any remaining neutrals take the embedding direction.
-	      for (var i = 0; i < len; ++i) {
-	        if (isNeutral.test(types[i])) {
-	          for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
-	          var before = (i ? types[i-1] : outerType) == "L";
-	          var after = (end < len ? types[end] : outerType) == "L";
-	          var replace = before || after ? "L" : "R";
-	          for (var j = i; j < end; ++j) types[j] = replace;
-	          i = end - 1;
-	        }
-	      }
-
-	      // Here we depart from the documented algorithm, in order to avoid
-	      // building up an actual levels array. Since there are only three
-	      // levels (0, 1, 2) in an implementation that doesn't take
-	      // explicit embedding into account, we can build up the order on
-	      // the fly, without following the level-based algorithm.
-	      var order = [], m;
-	      for (var i = 0; i < len;) {
-	        if (countsAsLeft.test(types[i])) {
-	          var start = i;
-	          for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
-	          order.push(new BidiSpan(0, start, i));
-	        } else {
-	          var pos = i, at = order.length;
-	          for (++i; i < len && types[i] != "L"; ++i) {}
-	          for (var j = pos; j < i;) {
-	            if (countsAsNum.test(types[j])) {
-	              if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j));
-	              var nstart = j;
-	              for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
-	              order.splice(at, 0, new BidiSpan(2, nstart, j));
-	              pos = j;
-	            } else ++j;
-	          }
-	          if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i));
-	        }
-	      }
-	      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
-	        order[0].from = m[0].length;
-	        order.unshift(new BidiSpan(0, 0, m[0].length));
-	      }
-	      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
-	        lst(order).to -= m[0].length;
-	        order.push(new BidiSpan(0, len - m[0].length, len));
-	      }
-	      if (order[0].level == 2)
-	        order.unshift(new BidiSpan(1, order[0].to, order[0].to));
-	      if (order[0].level != lst(order).level)
-	        order.push(new BidiSpan(order[0].level, len, len));
-
-	      return order;
-	    };
-	  })();
-
-	  // THE END
-
-	  CodeMirror.version = "5.16.0";
-
-	  return CodeMirror;
-	});
-
-
-/***/ },
+	      var ranges = copyableRanges(cm)
+	      setLastCopied({lineWise: true, text: ranges.text})
+	      if (e.type == "cut") {
+	        cm.setSelections(ranges.ranges, null, sel_dontScroll)
+	      } else {
+	        input.prevInput = ""
+	        te.value = ranges.text.join("\n")
+	        selectInput(te)
+	      }
+	    }
+	    if (e.type == "cut") { cm.state.cutIncoming = true }
+	  }
+	  on(te, "cut", prepareCopyCut)
+	  on(te, "copy", prepareCopyCut)
+
+	  on(display.scroller, "paste", function (e) {
+	    if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+	    cm.state.pasteIncoming = true
+	    input.focus()
+	  })
+
+	  // Prevent normal selection in the editor (we handle our own)
+	  on(display.lineSpace, "selectstart", function (e) {
+	    if (!eventInWidget(display, e)) { e_preventDefault(e) }
+	  })
+
+	  on(te, "compositionstart", function () {
+	    var start = cm.getCursor("from")
+	    if (input.composing) { input.composing.range.clear() }
+	    input.composing = {
+	      start: start,
+	      range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+	    }
+	  })
+	  on(te, "compositionend", function () {
+	    if (input.composing) {
+	      input.poll()
+	      input.composing.range.clear()
+	      input.composing = null
+	    }
+	  })
+	};
+
+	TextareaInput.prototype.prepareSelection = function () {
+	  // Redraw the selection and/or cursor
+	  var cm = this.cm, display = cm.display, doc = cm.doc
+	  var result = prepareSelection(cm)
+
+	  // Move the hidden textarea near the cursor to prevent scrolling artifacts
+	  if (cm.options.moveInputWithCursor) {
+	    var headPos = cursorCoords(cm, doc.sel.primary().head, "div")
+	    var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
+	    result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+	                                        headPos.top + lineOff.top - wrapOff.top))
+	    result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+	                                         headPos.left + lineOff.left - wrapOff.left))
+	  }
+
+	  return result
+	};
+
+	TextareaInput.prototype.showSelection = function (drawn) {
+	  var cm = this.cm, display = cm.display
+	  removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
+	  removeChildrenAndAdd(display.selectionDiv, drawn.selection)
+	  if (drawn.teTop != null) {
+	    this.wrapper.style.top = drawn.teTop + "px"
+	    this.wrapper.style.left = drawn.teLeft + "px"
+	  }
+	};
+
+	// Reset the input to correspond to the selection (or to be empty,
+	// when not typing and nothing is selected)
+	TextareaInput.prototype.reset = function (typing) {
+	  if (this.contextMenuPending || this.composing) { return }
+	  var minimal, selected, cm = this.cm, doc = cm.doc
+	  if (cm.somethingSelected()) {
+	    this.prevInput = ""
+	    var range = doc.sel.primary()
+	    minimal = hasCopyEvent &&
+	      (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000)
+	    var content = minimal ? "-" : selected || cm.getSelection()
+	    this.textarea.value = content
+	    if (cm.state.focused) { selectInput(this.textarea) }
+	    if (ie && ie_version >= 9) { this.hasSelection = content }
+	  } else if (!typing) {
+	    this.prevInput = this.textarea.value = ""
+	    if (ie && ie_version >= 9) { this.hasSelection = null }
+	  }
+	  this.inaccurateSelection = minimal
+	};
+
+	TextareaInput.prototype.getField = function () { return this.textarea };
+
+	TextareaInput.prototype.supportsTouch = function () { return false };
+
+	TextareaInput.prototype.focus = function () {
+	  if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+	    try { this.textarea.focus() }
+	    catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+	  }
+	};
+
+	TextareaInput.prototype.blur = function () { this.textarea.blur() };
+
+	TextareaInput.prototype.resetPosition = function () {
+	  this.wrapper.style.top = this.wrapper.style.left = 0
+	};
+
+	TextareaInput.prototype.receivedFocus = function () { this.slowPoll() };
+
+	// Poll for input changes, using the normal rate of polling. This
+	// runs as long as the editor is focused.
+	TextareaInput.prototype.slowPoll = function () {
+	    var this$1 = this;
+
+	  if (this.pollingFast) { return }
+	  this.polling.set(this.cm.options.pollInterval, function () {
+	    this$1.poll()
+	    if (this$1.cm.state.focused) { this$1.slowPoll() }
+	  })
+	};
+
+	// When an event has just come in that is likely to add or change
+	// something in the input textarea, we poll faster, to ensure that
+	// the change appears on the screen quickly.
+	TextareaInput.prototype.fastPoll = function () {
+	  var missed = false, input = this
+	  input.pollingFast = true
+	  function p() {
+	    var changed = input.poll()
+	    if (!changed && !missed) {missed = true; input.polling.set(60, p)}
+	    else {input.pollingFast = false; input.slowPoll()}
+	  }
+	  input.polling.set(20, p)
+	};
+
+	// Read input from the textarea, and update the document to match.
+	// When something is selected, it is present in the textarea, and
+	// selected (unless it is huge, in which case a placeholder is
+	// used). When nothing is selected, the cursor sits after previously
+	// seen text (can be empty), which is stored in prevInput (we must
+	// not reset the textarea when typing, because that breaks IME).
+	TextareaInput.prototype.poll = function () {
+	    var this$1 = this;
+
+	  var cm = this.cm, input = this.textarea, prevInput = this.prevInput
+	  // Since this is called a *lot*, try to bail out as cheaply as
+	  // possible when it is clear that nothing happened. hasSelection
+	  // will be the case when there is a lot of text in the textarea,
+	  // in which case reading its value would be expensive.
+	  if (this.contextMenuPending || !cm.state.focused ||
+	      (hasSelection(input) && !prevInput && !this.composing) ||
+	      cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+	    { return false }
+
+	  var text = input.value
+	  // If nothing changed, bail.
+	  if (text == prevInput && !cm.somethingSelected()) { return false }
+	  // Work around nonsensical selection resetting in IE9/10, and
+	  // inexplicable appearance of private area unicode characters on
+	  // some key combos in Mac (#2689).
+	  if (ie && ie_version >= 9 && this.hasSelection === text ||
+	      mac && /[\uf700-\uf7ff]/.test(text)) {
+	    cm.display.input.reset()
+	    return false
+	  }
+
+	  if (cm.doc.sel == cm.display.selForContextMenu) {
+	    var first = text.charCodeAt(0)
+	    if (first == 0x200b && !prevInput) { prevInput = "\u200b" }
+	    if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+	  }
+	  // Find the part of the input that is actually new
+	  var same = 0, l = Math.min(prevInput.length, text.length)
+	  while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same }
+
+	  runInOp(cm, function () {
+	    applyTextInput(cm, text.slice(same), prevInput.length - same,
+	                   null, this$1.composing ? "*compose" : null)
+
+	    // Don't leave long text in the textarea, since it makes further polling slow
+	    if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = "" }
+	    else { this$1.prevInput = text }
+
+	    if (this$1.composing) {
+	      this$1.composing.range.clear()
+	      this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+	                                         {className: "CodeMirror-composing"})
+	    }
+	  })
+	  return true
+	};
+
+	TextareaInput.prototype.ensurePolled = function () {
+	  if (this.pollingFast && this.poll()) { this.pollingFast = false }
+	};
+
+	TextareaInput.prototype.onKeyPress = function () {
+	  if (ie && ie_version >= 9) { this.hasSelection = null }
+	  this.fastPoll()
+	};
+
+	TextareaInput.prototype.onContextMenu = function (e) {
+	  var input = this, cm = input.cm, display = cm.display, te = input.textarea
+	  var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop
+	  if (!pos || presto) { return } // Opera is difficult.
+
+	  // Reset the current text selection only if the click is done outside of the selection
+	  // and 'resetSelectionOnContextMenu' option is true.
+	  var reset = cm.options.resetSelectionOnContextMenu
+	  if (reset && cm.doc.sel.contains(pos) == -1)
+	    { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll) }
+
+	  var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText
+	  input.wrapper.style.cssText = "position: absolute"
+	  var wrapperBox = input.wrapper.getBoundingClientRect()
+	  te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);"
+	  var oldScrollY
+	  if (webkit) { oldScrollY = window.scrollY } // Work around Chrome issue (#2712)
+	  display.input.focus()
+	  if (webkit) { window.scrollTo(null, oldScrollY) }
+	  display.input.reset()
+	  // Adds "Select all" to context menu in FF
+	  if (!cm.somethingSelected()) { te.value = input.prevInput = " " }
+	  input.contextMenuPending = true
+	  display.selForContextMenu = cm.doc.sel
+	  clearTimeout(display.detectingSelectAll)
+
+	  // Select-all will be greyed out if there's nothing to select, so
+	  // this adds a zero-width space so that we can later check whether
+	  // it got selected.
+	  function prepareSelectAllHack() {
+	    if (te.selectionStart != null) {
+	      var selected = cm.somethingSelected()
+	      var extval = "\u200b" + (selected ? te.value : "")
+	      te.value = "\u21da" // Used to catch context-menu undo
+	      te.value = extval
+	      input.prevInput = selected ? "" : "\u200b"
+	      te.selectionStart = 1; te.selectionEnd = extval.length
+	      // Re-set this, in case some other handler touched the
+	      // selection in the meantime.
+	      display.selForContextMenu = cm.doc.sel
+	    }
+	  }
+	  function rehide() {
+	    input.contextMenuPending = false
+	    input.wrapper.style.cssText = oldWrapperCSS
+	    te.style.cssText = oldCSS
+	    if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos) }
+
+	    // Try to detect the user choosing select-all
+	    if (te.selectionStart != null) {
+	      if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack() }
+	      var i = 0, poll = function () {
+	        if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+	            te.selectionEnd > 0 && input.prevInput == "\u200b") {
+	          operation(cm, selectAll)(cm)
+	        } else if (i++ < 10) {
+	          display.detectingSelectAll = setTimeout(poll, 500)
+	        } else {
+	          display.selForContextMenu = null
+	          display.input.reset()
+	        }
+	      }
+	      display.detectingSelectAll = setTimeout(poll, 200)
+	    }
+	  }
+
+	  if (ie && ie_version >= 9) { prepareSelectAllHack() }
+	  if (captureRightClick) {
+	    e_stop(e)
+	    var mouseup = function () {
+	      off(window, "mouseup", mouseup)
+	      setTimeout(rehide, 20)
+	    }
+	    on(window, "mouseup", mouseup)
+	  } else {
+	    setTimeout(rehide, 50)
+	  }
+	};
+
+	TextareaInput.prototype.readOnlyChanged = function (val) {
+	  if (!val) { this.reset() }
+	  this.textarea.disabled = val == "nocursor"
+	};
+
+	TextareaInput.prototype.setUneditable = function () {};
+
+	TextareaInput.prototype.needsContentAttribute = false
+
+	function fromTextArea(textarea, options) {
+	  options = options ? copyObj(options) : {}
+	  options.value = textarea.value
+	  if (!options.tabindex && textarea.tabIndex)
+	    { options.tabindex = textarea.tabIndex }
+	  if (!options.placeholder && textarea.placeholder)
+	    { options.placeholder = textarea.placeholder }
+	  // Set autofocus to true if this textarea is focused, or if it has
+	  // autofocus and no other element is focused.
+	  if (options.autofocus == null) {
+	    var hasFocus = activeElt()
+	    options.autofocus = hasFocus == textarea ||
+	      textarea.getAttribute("autofocus") != null && hasFocus == document.body
+	  }
+
+	  function save() {textarea.value = cm.getValue()}
+
+	  var realSubmit
+	  if (textarea.form) {
+	    on(textarea.form, "submit", save)
+	    // Deplorable hack to make the submit method do the right thing.
+	    if (!options.leaveSubmitMethodAlone) {
+	      var form = textarea.form
+	      realSubmit = form.submit
+	      try {
+	        var wrappedSubmit = form.submit = function () {
+	          save()
+	          form.submit = realSubmit
+	          form.submit()
+	          form.submit = wrappedSubmit
+	        }
+	      } catch(e) {}
+	    }
+	  }
+
+	  options.finishInit = function (cm) {
+	    cm.save = save
+	    cm.getTextArea = function () { return textarea; }
+	    cm.toTextArea = function () {
+	      cm.toTextArea = isNaN // Prevent this from being ran twice
+	      save()
+	      textarea.parentNode.removeChild(cm.getWrapperElement())
+	      textarea.style.display = ""
+	      if (textarea.form) {
+	        off(textarea.form, "submit", save)
+	        if (typeof textarea.form.submit == "function")
+	          { textarea.form.submit = realSubmit }
+	      }
+	    }
+	  }
+
+	  textarea.style.display = "none"
+	  var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+	    options)
+	  return cm
+	}
+
+	function addLegacyProps(CodeMirror) {
+	  CodeMirror.off = off
+	  CodeMirror.on = on
+	  CodeMirror.wheelEventPixels = wheelEventPixels
+	  CodeMirror.Doc = Doc
+	  CodeMirror.splitLines = splitLinesAuto
+	  CodeMirror.countColumn = countColumn
+	  CodeMirror.findColumn = findColumn
+	  CodeMirror.isWordChar = isWordCharBasic
+	  CodeMirror.Pass = Pass
+	  CodeMirror.signal = signal
+	  CodeMirror.Line = Line
+	  CodeMirror.changeEnd = changeEnd
+	  CodeMirror.scrollbarModel = scrollbarModel
+	  CodeMirror.Pos = Pos
+	  CodeMirror.cmpPos = cmp
+	  CodeMirror.modes = modes
+	  CodeMirror.mimeModes = mimeModes
+	  CodeMirror.resolveMode = resolveMode
+	  CodeMirror.getMode = getMode
+	  CodeMirror.modeExtensions = modeExtensions
+	  CodeMirror.extendMode = extendMode
+	  CodeMirror.copyState = copyState
+	  CodeMirror.startState = startState
+	  CodeMirror.innerMode = innerMode
+	  CodeMirror.commands = commands
+	  CodeMirror.keyMap = keyMap
+	  CodeMirror.keyName = keyName
+	  CodeMirror.isModifierKey = isModifierKey
+	  CodeMirror.lookupKey = lookupKey
+	  CodeMirror.normalizeKeyMap = normalizeKeyMap
+	  CodeMirror.StringStream = StringStream
+	  CodeMirror.SharedTextMarker = SharedTextMarker
+	  CodeMirror.TextMarker = TextMarker
+	  CodeMirror.LineWidget = LineWidget
+	  CodeMirror.e_preventDefault = e_preventDefault
+	  CodeMirror.e_stopPropagation = e_stopPropagation
+	  CodeMirror.e_stop = e_stop
+	  CodeMirror.addClass = addClass
+	  CodeMirror.contains = contains
+	  CodeMirror.rmClass = rmClass
+	  CodeMirror.keyNames = keyNames
+	}
+
+	// EDITOR CONSTRUCTOR
+
+	defineOptions(CodeMirror)
+
+	addEditorMethods(CodeMirror)
+
+	// Set up methods on CodeMirror's prototype to redirect to the editor's document.
+	var dontDelegate = "iter insert remove copy getEditor constructor".split(" ")
+	for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+	  { CodeMirror.prototype[prop] = (function(method) {
+	    return function() {return method.apply(this.doc, arguments)}
+	  })(Doc.prototype[prop]) } }
+
+	eventMixin(Doc)
+
+	// INPUT HANDLING
+
+	CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput}
+
+	// MODE DEFINITION AND QUERYING
+
+	// Extra arguments are stored as the mode's dependencies, which is
+	// used by (legacy) mechanisms like loadmode.js to automatically
+	// load a mode. (Preferred mechanism is the require/define calls.)
+	CodeMirror.defineMode = function(name/*, mode, …*/) {
+	  if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name }
+	  defineMode.apply(this, arguments)
+	}
+
+	CodeMirror.defineMIME = defineMIME
+
+	// Minimal default mode.
+	CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); })
+	CodeMirror.defineMIME("text/plain", "null")
+
+	// EXTENSIONS
+
+	CodeMirror.defineExtension = function (name, func) {
+	  CodeMirror.prototype[name] = func
+	}
+	CodeMirror.defineDocExtension = function (name, func) {
+	  Doc.prototype[name] = func
+	}
+
+	CodeMirror.fromTextArea = fromTextArea
+
+	addLegacyProps(CodeMirror)
+
+	CodeMirror.version = "5.27.4"
+
+	return CodeMirror;
+
+	})));
+
+/***/ }),
 /* 3 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
-	    mod(__webpack_require__(2));
+	    mod(__webpack_require__(2))
 	  else if (typeof define == "function" && define.amd) // AMD
-	    define(["../../lib/codemirror"], mod);
+	    define(["../../lib/codemirror"], mod)
 	  else // Plain browser env
-	    mod(CodeMirror);
+	    mod(CodeMirror)
 	})(function(CodeMirror) {
-	  "use strict";
-	  var Pos = CodeMirror.Pos;
-
-	  function SearchCursor(doc, query, pos, caseFold) {
-	    this.atOccurrence = false; this.doc = doc;
-	    if (caseFold == null && typeof query == "string") caseFold = false;
-
-	    pos = pos ? doc.clipPos(pos) : Pos(0, 0);
-	    this.pos = {from: pos, to: pos};
-
-	    // The matches method is filled in based on the type of query.
-	    // It takes a position and a direction, and returns an object
-	    // describing the next occurrence of the query, or null if no
-	    // more matches were found.
-	    if (typeof query != "string") { // Regexp match
-	      if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
+	  "use strict"
+	  var Pos = CodeMirror.Pos
+
+	  function regexpFlags(regexp) {
+	    var flags = regexp.flags
+	    return flags != null ? flags : (regexp.ignoreCase ? "i" : "")
+	      + (regexp.global ? "g" : "")
+	      + (regexp.multiline ? "m" : "")
+	  }
+
+	  function ensureGlobal(regexp) {
+	    return regexp.global ? regexp : new RegExp(regexp.source, regexpFlags(regexp) + "g")
+	  }
+
+	  function maybeMultiline(regexp) {
+	    return /\\s|\\n|\n|\\W|\\D|\[\^/.test(regexp.source)
+	  }
+
+	  function searchRegexpForward(doc, regexp, start) {
+	    regexp = ensureGlobal(regexp)
+	    for (var line = start.line, ch = start.ch, last = doc.lastLine(); line <= last; line++, ch = 0) {
+	      regexp.lastIndex = ch
+	      var string = doc.getLine(line), match = regexp.exec(string)
+	      if (match)
+	        return {from: Pos(line, match.index),
+	                to: Pos(line, match.index + match[0].length),
+	                match: match}
+	    }
+	  }
+
+	  function searchRegexpForwardMultiline(doc, regexp, start) {
+	    if (!maybeMultiline(regexp)) return searchRegexpForward(doc, regexp, start)
+
+	    regexp = ensureGlobal(regexp)
+	    var string, chunk = 1
+	    for (var line = start.line, last = doc.lastLine(); line <= last;) {
+	      // This grows the search buffer in exponentially-sized chunks
+	      // between matches, so that nearby matches are fast and don't
+	      // require concatenating the whole document (in case we're
+	      // searching for something that has tons of matches), but at the
+	      // same time, the amount of retries is limited.
+	      for (var i = 0; i < chunk; i++) {
+	        var curLine = doc.getLine(line++)
+	        string = string == null ? curLine : string + "\n" + curLine
+	      }
+	      chunk = chunk * 2
+	      regexp.lastIndex = start.ch
+	      var match = regexp.exec(string)
+	      if (match) {
+	        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+	        var startLine = start.line + before.length - 1, startCh = before[before.length - 1].length
+	        return {from: Pos(startLine, startCh),
+	                to: Pos(startLine + inside.length - 1,
+	                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+	                match: match}
+	      }
+	    }
+	  }
+
+	  function lastMatchIn(string, regexp) {
+	    var cutOff = 0, match
+	    for (;;) {
+	      regexp.lastIndex = cutOff
+	      var newMatch = regexp.exec(string)
+	      if (!newMatch) return match
+	      match = newMatch
+	      cutOff = match.index + (match[0].length || 1)
+	      if (cutOff == string.length) return match
+	    }
+	  }
+
+	  function searchRegexpBackward(doc, regexp, start) {
+	    regexp = ensureGlobal(regexp)
+	    for (var line = start.line, ch = start.ch, first = doc.firstLine(); line >= first; line--, ch = -1) {
+	      var string = doc.getLine(line)
+	      if (ch > -1) string = string.slice(0, ch)
+	      var match = lastMatchIn(string, regexp)
+	      if (match)
+	        return {from: Pos(line, match.index),
+	                to: Pos(line, match.index + match[0].length),
+	                match: match}
+	    }
+	  }
+
+	  function searchRegexpBackwardMultiline(doc, regexp, start) {
+	    regexp = ensureGlobal(regexp)
+	    var string, chunk = 1
+	    for (var line = start.line, first = doc.firstLine(); line >= first;) {
+	      for (var i = 0; i < chunk; i++) {
+	        var curLine = doc.getLine(line--)
+	        string = string == null ? curLine.slice(0, start.ch) : curLine + "\n" + string
+	      }
+	      chunk *= 2
+
+	      var match = lastMatchIn(string, regexp)
+	      if (match) {
+	        var before = string.slice(0, match.index).split("\n"), inside = match[0].split("\n")
+	        var startLine = line + before.length, startCh = before[before.length - 1].length
+	        return {from: Pos(startLine, startCh),
+	                to: Pos(startLine + inside.length - 1,
+	                        inside.length == 1 ? startCh + inside[0].length : inside[inside.length - 1].length),
+	                match: match}
+	      }
+	    }
+	  }
+
+	  var doFold, noFold
+	  if (String.prototype.normalize) {
+	    doFold = function(str) { return str.normalize("NFD").toLowerCase() }
+	    noFold = function(str) { return str.normalize("NFD") }
+	  } else {
+	    doFold = function(str) { return str.toLowerCase() }
+	    noFold = function(str) { return str }
+	  }
+
+	  // Maps a position in a case-folded line back to a position in the original line
+	  // (compensating for codepoints increasing in number during folding)
+	  function adjustPos(orig, folded, pos, foldFunc) {
+	    if (orig.length == folded.length) return pos
+	    for (var pos1 = Math.min(pos, orig.length);;) {
+	      var len1 = foldFunc(orig.slice(0, pos1)).length
+	      if (len1 < pos) ++pos1
+	      else if (len1 > pos) --pos1
+	      else return pos1
+	    }
+	  }
+
+	  function searchStringForward(doc, query, start, caseFold) {
+	    // Empty string would match anything and never progress, so we
+	    // define it to match nothing instead.
+	    if (!query.length) return null
+	    var fold = caseFold ? doFold : noFold
+	    var lines = fold(query).split(/\r|\n\r?/)
+
+	    search: for (var line = start.line, ch = start.ch, last = doc.lastLine() + 1 - lines.length; line <= last; line++, ch = 0) {
+	      var orig = doc.getLine(line).slice(ch), string = fold(orig)
+	      if (lines.length == 1) {
+	        var found = string.indexOf(lines[0])
+	        if (found == -1) continue search
+	        var start = adjustPos(orig, string, found, fold) + ch
+	        return {from: Pos(line, adjustPos(orig, string, found, fold) + ch),
+	                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold) + ch)}
+	      } else {
+	        var cutFrom = string.length - lines[0].length
+	        if (string.slice(cutFrom) != lines[0]) continue search
+	        for (var i = 1; i < lines.length - 1; i++)
+	          if (fold(doc.getLine(line + i)) != lines[i]) continue search
+	        var end = doc.getLine(line + lines.length - 1), endString = fold(end), lastLine = lines[lines.length - 1]
+	        if (end.slice(0, lastLine.length) != lastLine) continue search
+	        return {from: Pos(line, adjustPos(orig, string, cutFrom, fold) + ch),
+	                to: Pos(line + lines.length - 1, adjustPos(end, endString, lastLine.length, fold))}
+	      }
+	    }
+	  }
+
+	  function searchStringBackward(doc, query, start, caseFold) {
+	    if (!query.length) return null
+	    var fold = caseFold ? doFold : noFold
+	    var lines = fold(query).split(/\r|\n\r?/)
+
+	    search: for (var line = start.line, ch = start.ch, first = doc.firstLine() - 1 + lines.length; line >= first; line--, ch = -1) {
+	      var orig = doc.getLine(line)
+	      if (ch > -1) orig = orig.slice(0, ch)
+	      var string = fold(orig)
+	      if (lines.length == 1) {
+	        var found = string.lastIndexOf(lines[0])
+	        if (found == -1) continue search
+	        return {from: Pos(line, adjustPos(orig, string, found, fold)),
+	                to: Pos(line, adjustPos(orig, string, found + lines[0].length, fold))}
+	      } else {
+	        var lastLine = lines[lines.length - 1]
+	        if (string.slice(0, lastLine.length) != lastLine) continue search
+	        for (var i = 1, start = line - lines.length + 1; i < lines.length - 1; i++)
+	          if (fold(doc.getLine(start + i)) != lines[i]) continue search
+	        var top = doc.getLine(line + 1 - lines.length), topString = fold(top)
+	        if (topString.slice(topString.length - lines[0].length) != lines[0]) continue search
+	        return {from: Pos(line + 1 - lines.length, adjustPos(top, topString, top.length - lines[0].length, fold)),
+	                to: Pos(line, adjustPos(orig, string, lastLine.length, fold))}
+	      }
+	    }
+	  }
+
+	  function SearchCursor(doc, query, pos, options) {
+	    this.atOccurrence = false
+	    this.doc = doc
+	    pos = pos ? doc.clipPos(pos) : Pos(0, 0)
+	    this.pos = {from: pos, to: pos}
+
+	    var caseFold
+	    if (typeof options == "object") {
+	      caseFold = options.caseFold
+	    } else { // Backwards compat for when caseFold was the 4th argument
+	      caseFold = options
+	      options = null
+	    }
+
+	    if (typeof query == "string") {
+	      if (caseFold == null) caseFold = false
 	      this.matches = function(reverse, pos) {
-	        if (reverse) {
-	          query.lastIndex = 0;
-	          var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;
-	          for (;;) {
-	            query.lastIndex = cutOff;
-	            var newMatch = query.exec(line);
-	            if (!newMatch) break;
-	            match = newMatch;
-	            start = match.index;
-	            cutOff = match.index + (match[0].length || 1);
-	            if (cutOff == line.length) break;
-	          }
-	          var matchLen = (match && match[0].length) || 0;
-	          if (!matchLen) {
-	            if (start == 0 && line.length == 0) {match = undefined;}
-	            else if (start != doc.getLine(pos.line).length) {
-	              matchLen++;
-	            }
-	          }
-	        } else {
-	          query.lastIndex = pos.ch;
-	          var line = doc.getLine(pos.line), match = query.exec(line);
-	          var matchLen = (match && match[0].length) || 0;
-	          var start = match && match.index;
-	          if (start + matchLen != line.length && !matchLen) matchLen = 1;
-	        }
-	        if (match && matchLen)
-	          return {from: Pos(pos.line, start),
-	                  to: Pos(pos.line, start + matchLen),
-	                  match: match};
-	      };
-	    } else { // String query
-	      var origQuery = query;
-	      if (caseFold) query = query.toLowerCase();
-	      var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
-	      var target = query.split("\n");
-	      // Different methods for single-line and multi-line queries
-	      if (target.length == 1) {
-	        if (!query.length) {
-	          // Empty string would match anything and never progress, so
-	          // we define it to match nothing instead.
-	          this.matches = function() {};
-	        } else {
-	          this.matches = function(reverse, pos) {
-	            if (reverse) {
-	              var orig = doc.getLine(pos.line).slice(0, pos.ch), line = fold(orig);
-	              var match = line.lastIndexOf(query);
-	              if (match > -1) {
-	                match = adjustPos(orig, line, match);
-	                return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
-	              }
-	             } else {
-	               var orig = doc.getLine(pos.line).slice(pos.ch), line = fold(orig);
-	               var match = line.indexOf(query);
-	               if (match > -1) {
-	                 match = adjustPos(orig, line, match) + pos.ch;
-	                 return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
-	               }
-	            }
-	          };
-	        }
-	      } else {
-	        var origTarget = origQuery.split("\n");
+	        return (reverse ? searchStringBackward : searchStringForward)(doc, query, pos, caseFold)
+	      }
+	    } else {
+	      query = ensureGlobal(query)
+	      if (!options || options.multiline !== false)
 	        this.matches = function(reverse, pos) {
-	          var last = target.length - 1;
-	          if (reverse) {
-	            if (pos.line - (target.length - 1) < doc.firstLine()) return;
-	            if (fold(doc.getLine(pos.line).slice(0, origTarget[last].length)) != target[target.length - 1]) return;
-	            var to = Pos(pos.line, origTarget[last].length);
-	            for (var ln = pos.line - 1, i = last - 1; i >= 1; --i, --ln)
-	              if (target[i] != fold(doc.getLine(ln))) return;
-	            var line = doc.getLine(ln), cut = line.length - origTarget[0].length;
-	            if (fold(line.slice(cut)) != target[0]) return;
-	            return {from: Pos(ln, cut), to: to};
-	          } else {
-	            if (pos.line + (target.length - 1) > doc.lastLine()) return;
-	            var line = doc.getLine(pos.line), cut = line.length - origTarget[0].length;
-	            if (fold(line.slice(cut)) != target[0]) return;
-	            var from = Pos(pos.line, cut);
-	            for (var ln = pos.line + 1, i = 1; i < last; ++i, ++ln)
-	              if (target[i] != fold(doc.getLine(ln))) return;
-	            if (fold(doc.getLine(ln).slice(0, origTarget[last].length)) != target[last]) return;
-	            return {from: from, to: Pos(ln, origTarget[last].length)};
-	          }
-	        };
-	      }
+	          return (reverse ? searchRegexpBackwardMultiline : searchRegexpForwardMultiline)(doc, query, pos)
+	        }
+	      else
+	        this.matches = function(reverse, pos) {
+	          return (reverse ? searchRegexpBackward : searchRegexpForward)(doc, query, pos)
+	        }
 	    }
 	  }
 
 	  SearchCursor.prototype = {
-	    findNext: function() {return this.find(false);},
-	    findPrevious: function() {return this.find(true);},
+	    findNext: function() {return this.find(false)},
+	    findPrevious: function() {return this.find(true)},
 
 	    find: function(reverse) {
-	      var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);
-	      function savePosAndFail(line) {
-	        var pos = Pos(line, 0);
-	        self.pos = {from: pos, to: pos};
-	        self.atOccurrence = false;
-	        return false;
-	      }
-
-	      for (;;) {
-	        if (this.pos = this.matches(reverse, pos)) {
-	          this.atOccurrence = true;
-	          return this.pos.match || true;
-	        }
+	      var result = this.matches(reverse, this.doc.clipPos(reverse ? this.pos.from : this.pos.to))
+
+	      // Implements weird auto-growing behavior on null-matches for
+	      // backwards-compatiblity with the vim code (unfortunately)
+	      while (result && CodeMirror.cmpPos(result.from, result.to) == 0) {
 	        if (reverse) {
-	          if (!pos.line) return savePosAndFail(0);
-	          pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);
-	        }
-	        else {
-	          var maxLine = this.doc.lineCount();
-	          if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
-	          pos = Pos(pos.line + 1, 0);
-	        }
-	      }
-	    },
-
-	    from: function() {if (this.atOccurrence) return this.pos.from;},
-	    to: function() {if (this.atOccurrence) return this.pos.to;},
+	          if (result.from.ch) result.from = Pos(result.from.line, result.from.ch - 1)
+	          else if (result.from.line == this.doc.firstLine()) result = null
+	          else result = this.matches(reverse, this.doc.clipPos(Pos(result.from.line - 1)))
+	        } else {
+	          if (result.to.ch < this.doc.getLine(result.to.line).length) result.to = Pos(result.to.line, result.to.ch + 1)
+	          else if (result.to.line == this.doc.lastLine()) result = null
+	          else result = this.matches(reverse, Pos(result.to.line + 1, 0))
+	        }
+	      }
+
+	      if (result) {
+	        this.pos = result
+	        this.atOccurrence = true
+	        return this.pos.match || true
+	      } else {
+	        var end = Pos(reverse ? this.doc.firstLine() : this.doc.lastLine() + 1, 0)
+	        this.pos = {from: end, to: end}
+	        return this.atOccurrence = false
+	      }
+	    },
+
+	    from: function() {if (this.atOccurrence) return this.pos.from},
+	    to: function() {if (this.atOccurrence) return this.pos.to},
 
 	    replace: function(newText, origin) {
-	      if (!this.atOccurrence) return;
-	      var lines = CodeMirror.splitLines(newText);
-	      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin);
+	      if (!this.atOccurrence) return
+	      var lines = CodeMirror.splitLines(newText)
+	      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin)
 	      this.pos.to = Pos(this.pos.from.line + lines.length - 1,
-	                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));
-	    }
-	  };
-
-	  // Maps a position in a case-folded line back to a position in the original line
-	  // (compensating for codepoints increasing in number during folding)
-	  function adjustPos(orig, folded, pos) {
-	    if (orig.length == folded.length) return pos;
-	    for (var pos1 = Math.min(pos, orig.length);;) {
-	      var len1 = orig.slice(0, pos1).toLowerCase().length;
-	      if (len1 < pos) ++pos1;
-	      else if (len1 > pos) --pos1;
-	      else return pos1;
+	                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0))
 	    }
 	  }
 
 	  CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
-	    return new SearchCursor(this.doc, query, pos, caseFold);
-	  });
+	    return new SearchCursor(this.doc, query, pos, caseFold)
+	  })
 	  CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
-	    return new SearchCursor(this, query, pos, caseFold);
-	  });
+	    return new SearchCursor(this, query, pos, caseFold)
+	  })
 
 	  CodeMirror.defineExtension("selectMatches", function(query, caseFold) {
-	    var ranges = [];
-	    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold);
+	    var ranges = []
+	    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold)
 	    while (cur.findNext()) {
-	      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break;
-	      ranges.push({anchor: cur.from(), head: cur.to()});
+	      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break
+	      ranges.push({anchor: cur.from(), head: cur.to()})
 	    }
 	    if (ranges.length)
-	      this.setSelections(ranges, 0);
-	  });
+	      this.setSelections(ranges, 0)
+	  })
 	});
 
 
-/***/ },
+/***/ }),
 /* 4 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	// Define search commands. Depends on dialog.js or another
 	// implementation of the openDialog method.
 
 	// Replace works a little oddly -- it will do the replace on the next
@@ -9414,25 +10079,26 @@ var CodeMirror =
 	  }
 
 	  function queryCaseInsensitive(query) {
 	    return typeof query == "string" && query == query.toLowerCase();
 	  }
 
 	  function getSearchCursor(cm, query, pos) {
 	    // Heuristic: if the query string is all lowercase, do a case insensitive search.
-	    return cm.getSearchCursor(query, pos, queryCaseInsensitive(query));
-	  }
-
-	  function persistentDialog(cm, text, deflt, f) {
-	    cm.openDialog(text, f, {
+	    return cm.getSearchCursor(query, pos, {caseFold: queryCaseInsensitive(query), multiline: true});
+	  }
+
+	  function persistentDialog(cm, text, deflt, onEnter, onKeyDown) {
+	    cm.openDialog(text, onEnter, {
 	      value: deflt,
 	      selectValueOnOpen: true,
 	      closeOnEnter: false,
-	      onClose: function() { clearSearch(cm); }
+	      onClose: function() { clearSearch(cm); },
+	      onKeyDown: onKeyDown
 	    });
 	  }
 
 	  function dialog(cm, text, shortText, deflt, f) {
 	    if (cm.openDialog) cm.openDialog(text, f, {value: deflt, selectValueOnOpen: true});
 	    else f(prompt(shortText, deflt));
 	  }
 
@@ -9471,17 +10137,17 @@ var CodeMirror =
 	    state.overlay = searchOverlay(state.query, queryCaseInsensitive(state.query));
 	    cm.addOverlay(state.overlay);
 	    if (cm.showMatchesOnScrollbar) {
 	      if (state.annotate) { state.annotate.clear(); state.annotate = null; }
 	      state.annotate = cm.showMatchesOnScrollbar(state.query, queryCaseInsensitive(state.query));
 	    }
 	  }
 
-	  function doSearch(cm, rev, persistent) {
+	  function doSearch(cm, rev, persistent, immediate) {
 	    if (!queryDialog) {
 	      let doc = cm.getWrapperElement().ownerDocument;
 	      let inp = doc.createElement("input");
 
 	      inp.type = "search";
 	      inp.placeholder = cm.l10n("findCmd.promptMessage");
 	      inp.style.marginInlineStart = "1em";
 	      inp.style.marginInlineEnd = "1em";
@@ -9493,32 +10159,50 @@ var CodeMirror =
 	      queryDialog.style.display = "flex";
 	    }
 
 	    var state = getSearchState(cm);
 	    if (state.query) return findNext(cm, rev);
 	    var q = cm.getSelection() || state.lastQuery;
 	    if (persistent && cm.openDialog) {
 	      var hiding = null
-	      persistentDialog(cm, queryDialog, q, function(query, event) {
+	      var searchNext = function(query, event) {
 	        CodeMirror.e_stop(event);
 	        if (!query) return;
 	        if (query != state.queryText) {
 	          startSearch(cm, state, query);
 	          state.posFrom = state.posTo = cm.getCursor();
 	        }
 	        if (hiding) hiding.style.opacity = 1
 	        findNext(cm, event.shiftKey, function(_, to) {
 	          var dialog
 	          if (to.line < 3 && document.querySelector &&
 	              (dialog = cm.display.wrapper.querySelector(".CodeMirror-dialog")) &&
 	              dialog.getBoundingClientRect().bottom - 4 > cm.cursorCoords(to, "window").top)
 	            (hiding = dialog).style.opacity = .4
 	        })
+	      };
+	      persistentDialog(cm, queryDialog, q, searchNext, function(event, query) {
+	        var keyName = CodeMirror.keyName(event)
+	        var cmd = CodeMirror.keyMap[cm.getOption("keyMap")][keyName]
+	        if (!cmd) cmd = cm.getOption('extraKeys')[keyName]
+	        if (cmd == "findNext" || cmd == "findPrev" ||
+	          cmd == "findPersistentNext" || cmd == "findPersistentPrev") {
+	          CodeMirror.e_stop(event);
+	          startSearch(cm, getSearchState(cm), query);
+	          cm.execCommand(cmd);
+	        } else if (cmd == "find" || cmd == "findPersistent") {
+	          CodeMirror.e_stop(event);
+	          searchNext(query, event);
+	        }
 	      });
+	      if (immediate && q) {
+	        startSearch(cm, state, q);
+	        findNext(cm, rev);
+	      }
 	    } else {
 	      dialog(cm, queryDialog, "Search for:", q, function(query) {
 	        if (query && !state.query) cm.operation(function() {
 	          startSearch(cm, state, query);
 	          state.posFrom = state.posTo = cm.getCursor();
 	          findNext(cm, rev);
 	        });
 	      });
@@ -9544,34 +10228,34 @@ var CodeMirror =
 	    if (!state.query) return;
 	    state.query = state.queryText = null;
 	    cm.removeOverlay(state.overlay);
 	    if (state.annotate) { state.annotate.clear(); state.annotate = null; }
 	  });}
 
 	  var replaceQueryDialog =
 	    ' <input type="text" style="width: 10em" class="CodeMirror-search-field"/> <span style="color: #888" class="CodeMirror-search-hint">(Use /re/ syntax for regexp search)</span>';
-	  var replacementQueryDialog = 'With: <input type="text" style="width: 10em" class="CodeMirror-search-field"/>';
-	  var doReplaceConfirm = "Replace? <button>Yes</button> <button>No</button> <button>All</button> <button>Stop</button>";
+	  var replacementQueryDialog = '<span class="CodeMirror-search-label">With:</span> <input type="text" style="width: 10em" class="CodeMirror-search-field"/>';
+	  var doReplaceConfirm = '<span class="CodeMirror-search-label">Replace?</span> <button>Yes</button> <button>No</button> <button>All</button> <button>Stop</button>';
 
 	  function replaceAll(cm, query, text) {
 	    cm.operation(function() {
 	      for (var cursor = getSearchCursor(cm, query); cursor.findNext();) {
 	        if (typeof query != "string") {
 	          var match = cm.getRange(cursor.from(), cursor.to()).match(query);
 	          cursor.replace(text.replace(/\$(\d)/g, function(_, i) {return match[i];}));
 	        } else cursor.replace(text);
 	      }
 	    });
 	  }
 
 	  function replace(cm, all) {
 	    if (cm.getOption("readOnly")) return;
 	    var query = cm.getSelection() || getSearchState(cm).lastQuery;
-	    var dialogText = all ? "Replace all:" : "Replace:"
+	    var dialogText = '<span class="CodeMirror-search-label">' + (all ? 'Replace all:' : 'Replace:') + '</span>';
 	    dialog(cm, dialogText + replaceQueryDialog, dialogText, query, function(query) {
 	      if (!query) return;
 	      query = parseQuery(query);
 	      dialog(cm, replacementQueryDialog, "Replace with:", "", function(text) {
 	        text = parseString(text)
 	        if (all) {
 	          replaceAll(cm, query, text)
 	        } else {
@@ -9598,27 +10282,29 @@ var CodeMirror =
 	          advance();
 	        }
 	      });
 	    });
 	  }
 
 	  CodeMirror.commands.find = function(cm) {clearSearch(cm); doSearch(cm);};
 	  CodeMirror.commands.findPersistent = function(cm) {clearSearch(cm); doSearch(cm, false, true);};
+	  CodeMirror.commands.findPersistentNext = function(cm) {doSearch(cm, false, true, true);};
+	  CodeMirror.commands.findPersistentPrev = function(cm) {doSearch(cm, true, true, true);};
 	  CodeMirror.commands.findNext = doSearch;
 	  CodeMirror.commands.findPrev = function(cm) {doSearch(cm, true);};
 	  CodeMirror.commands.clearSearch = clearSearch;
 	  CodeMirror.commands.replace = replace;
 	  CodeMirror.commands.replaceAll = function(cm) {replace(cm, true);};
 	});
 
 
-/***/ },
+/***/ }),
 /* 5 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -9628,22 +10314,31 @@ var CodeMirror =
 	})(function(CodeMirror) {
 	  var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
 	    (document.documentMode == null || document.documentMode < 8);
 
 	  var Pos = CodeMirror.Pos;
 
 	  var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
 
-	  function findMatchingBracket(cm, where, strict, config) {
+	  function findMatchingBracket(cm, where, config) {
 	    var line = cm.getLineHandle(where.line), pos = where.ch - 1;
-	    var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
+	    var afterCursor = config && config.afterCursor
+	    if (afterCursor == null)
+	      afterCursor = /(^| )cm-fat-cursor($| )/.test(cm.getWrapperElement().className)
+
+	    // A cursor is defined as between two characters, but in in vim command mode
+	    // (i.e. not insert mode), the cursor is visually represented as a
+	    // highlighted box on top of the 2nd character. Otherwise, we allow matches
+	    // from before or after the cursor.
+	    var match = (!afterCursor && pos >= 0 && matching[line.text.charAt(pos)]) ||
+	        matching[line.text.charAt(++pos)];
 	    if (!match) return null;
 	    var dir = match.charAt(1) == ">" ? 1 : -1;
-	    if (strict && (dir > 0) != (pos == where.ch)) return null;
+	    if (config && config.strict && (dir > 0) != (pos == where.ch)) return null;
 	    var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));
 
 	    var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config);
 	    if (found == null) return null;
 	    return {from: Pos(where.line, pos), to: found && found.pos,
 	            match: found && found.ch == match.charAt(0), forward: dir > 0};
 	  }
 
@@ -9681,17 +10376,17 @@ var CodeMirror =
 	    return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null;
 	  }
 
 	  function matchBrackets(cm, autoclear, config) {
 	    // Disable brace matching in long lines, since it'll cause hugely slow updates
 	    var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
 	    var marks = [], ranges = cm.listSelections();
 	    for (var i = 0; i < ranges.length; i++) {
-	      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config);
+	      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, config);
 	      if (match && cm.getLine(match.from.line).length <= maxHighlightLen) {
 	        var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
 	        marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));
 	        if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen)
 	          marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));
 	      }
 	    }
 
@@ -9714,37 +10409,48 @@ var CodeMirror =
 	  function doMatchBrackets(cm) {
 	    cm.operation(function() {
 	      if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
 	      currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);
 	    });
 	  }
 
 	  CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
-	    if (old && old != CodeMirror.Init)
+	    if (old && old != CodeMirror.Init) {
 	      cm.off("cursorActivity", doMatchBrackets);
+	      if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
+	    }
 	    if (val) {
 	      cm.state.matchBrackets = typeof val == "object" ? val : {};
 	      cm.on("cursorActivity", doMatchBrackets);
 	    }
 	  });
 
 	  CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
-	  CodeMirror.defineExtension("findMatchingBracket", function(pos, strict, config){
-	    return findMatchingBracket(this, pos, strict, config);
+	  CodeMirror.defineExtension("findMatchingBracket", function(pos, config, oldConfig){
+	    // Backwards-compatibility kludge
+	    if (oldConfig || typeof config == "boolean") {
+	      if (!oldConfig) {
+	        config = config ? {strict: true} : null
+	      } else {
+	        oldConfig.strict = config
+	        config = oldConfig
+	      }
+	    }
+	    return findMatchingBracket(this, pos, config)
 	  });
 	  CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){
 	    return scanForBracket(this, pos, dir, style, config);
 	  });
 	});
 
 
-/***/ },
+/***/ }),
 /* 6 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -9783,17 +10489,17 @@ var CodeMirror =
 	    keyMap["'" + bind.charAt(i) + "'"] = handler(bind.charAt(i));
 
 	  function handler(ch) {
 	    return function(cm) { return handleChar(cm, ch); };
 	  }
 
 	  function getConfig(cm) {
 	    var deflt = cm.state.closeBrackets;
-	    if (!deflt) return null;
+	    if (!deflt || deflt.override) return deflt;
 	    var mode = cm.getModeAt(cm.getCursor());
 	    return mode.closeBrackets || deflt;
 	  }
 
 	  function handleBackspace(cm) {
 	    var conf = getConfig(cm);
 	    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
 
@@ -9854,17 +10560,19 @@ var CodeMirror =
 
 	    var type;
 	    for (var i = 0; i < ranges.length; i++) {
 	      var range = ranges[i], cur = range.head, curType;
 	      var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
 	      if (opening && !range.empty()) {
 	        curType = "surround";
 	      } else if ((identical || !opening) && next == ch) {
-	        if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
+	        if (identical && stringStartsAfter(cm, cur))
+	          curType = "both";
+	        else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
 	          curType = "skipThree";
 	        else
 	          curType = "skip";
 	      } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
 	                 cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch &&
 	                 (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != ch)) {
 	        curType = "addFour";
 	      } else if (identical) {
@@ -9921,31 +10629,36 @@ var CodeMirror =
 	  }
 
 	  // Project the token type that will exists after the given char is
 	  // typed, and use it to determine whether it would cause the start
 	  // of a string token.
 	  function enteringString(cm, pos, ch) {
 	    var line = cm.getLine(pos.line);
 	    var token = cm.getTokenAt(pos);
-	    if (/\bstring2?\b/.test(token.type)) return false;
+	    if (/\bstring2?\b/.test(token.type) || stringStartsAfter(cm, pos)) return false;
 	    var stream = new CodeMirror.StringStream(line.slice(0, pos.ch) + ch + line.slice(pos.ch), 4);
 	    stream.pos = stream.start = token.start;
 	    for (;;) {
 	      var type1 = cm.getMode().token(stream, token.state);
 	      if (stream.pos >= pos.ch + 1) return /\bstring2?\b/.test(type1);
 	      stream.start = stream.pos;
 	    }
 	  }
+
+	  function stringStartsAfter(cm, pos) {
+	    var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
+	    return /\bstring/.test(token.type) && token.start == pos.ch
+	  }
 	});
 
 
-/***/ },
+/***/ }),
 /* 7 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -9985,22 +10698,27 @@ var CodeMirror =
 	      } else {
 	        cm.lineComment(from, to, options);
 	      }
 	    }
 	  });
 
 	  // Rough heuristic to try and detect lines that are part of multi-line string
 	  function probablyInsideString(cm, pos, line) {
-	    return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"`]/.test(line)
+	    return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"\`]/.test(line)
+	  }
+
+	  function getMode(cm, pos) {
+	    var mode = cm.getMode()
+	    return mode.useInnerComments === false || !mode.innerMode ? mode : cm.getModeAt(pos)
 	  }
 
 	  CodeMirror.defineExtension("lineComment", function(from, to, options) {
 	    if (!options) options = noOptions;
-	    var self = this, mode = self.getModeAt(from);
+	    var self = this, mode = getMode(self, from);
 	    var firstLine = self.getLine(from.line);
 	    if (firstLine == null || probablyInsideString(self, from, firstLine)) return;
 
 	    var commentString = options.lineComment || mode.lineComment;
 	    if (!commentString) {
 	      if (options.blockCommentStart || mode.blockCommentStart) {
 	        options.fullLines = true;
 	        self.blockComment(from, to, options);
@@ -10034,24 +10752,25 @@ var CodeMirror =
 	            self.replaceRange(commentString + pad, Pos(i, 0));
 	        }
 	      }
 	    });
 	  });
 
 	  CodeMirror.defineExtension("blockComment", function(from, to, options) {
 	    if (!options) options = noOptions;
-	    var self = this, mode = self.getModeAt(from);
+	    var self = this, mode = getMode(self, from);
 	    var startString = options.blockCommentStart || mode.blockCommentStart;
 	    var endString = options.blockCommentEnd || mode.blockCommentEnd;
 	    if (!startString || !endString) {
 	      if ((options.lineComment || mode.lineComment) && options.fullLines != false)
 	        self.lineComment(from, to, options);
 	      return;
 	    }
+	    if (/\bcomment\b/.test(self.getTokenTypeAt(Pos(from.line, 0)))) return
 
 	    var end = Math.min(to.line, self.lastLine());
 	    if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end;
 
 	    var pad = options.padding == null ? " " : options.padding;
 	    if (from.line > end) return;
 
 	    self.operation(function() {
@@ -10067,29 +10786,29 @@ var CodeMirror =
 	        self.replaceRange(endString, to);
 	        self.replaceRange(startString, from);
 	      }
 	    });
 	  });
 
 	  CodeMirror.defineExtension("uncomment", function(from, to, options) {
 	    if (!options) options = noOptions;
-	    var self = this, mode = self.getModeAt(from);
+	    var self = this, mode = getMode(self, from);
 	    var end = Math.min(to.ch != 0 || to.line == from.line ? to.line : to.line - 1, self.lastLine()), start = Math.min(from.line, end);
 
 	    // Try finding line comments
 	    var lineString = options.lineComment || mode.lineComment, lines = [];
 	    var pad = options.padding == null ? " " : options.padding, didSomething;
 	    lineComment: {
 	      if (!lineString) break lineComment;
 	      for (var i = start; i <= end; ++i) {
 	        var line = self.getLine(i);
 	        var found = line.indexOf(lineString);
 	        if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1;
-	        if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment;
+	        if (found == -1 && nonWS.test(line)) break lineComment;
 	        if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment;
 	        lines.push(line);
 	      }
 	      self.operation(function() {
 	        for (var i = start; i <= end; ++i) {
 	          var line = lines[i - start];
 	          var pos = line.indexOf(lineString), endPos = pos + lineString.length;
 	          if (pos < 0) continue;
@@ -10101,25 +10820,29 @@ var CodeMirror =
 	      if (didSomething) return true;
 	    }
 
 	    // Try block comments
 	    var startString = options.blockCommentStart || mode.blockCommentStart;
 	    var endString = options.blockCommentEnd || mode.blockCommentEnd;
 	    if (!startString || !endString) return false;
 	    var lead = options.blockCommentLead || mode.blockCommentLead;
-	    var startLine = self.getLine(start), endLine = end == start ? startLine : self.getLine(end);
-	    var open = startLine.indexOf(startString), close = endLine.lastIndexOf(endString);
+	    var startLine = self.getLine(start), open = startLine.indexOf(startString)
+	    if (open == -1) return false
+	    var endLine = end == start ? startLine : self.getLine(end)
+	    var close = endLine.indexOf(endString, end == start ? open + startString.length : 0);
 	    if (close == -1 && start != end) {
 	      endLine = self.getLine(--end);
-	      close = endLine.lastIndexOf(endString);
-	    }
-	    if (open == -1 || close == -1 ||
-	        !/comment/.test(self.getTokenTypeAt(Pos(start, open + 1))) ||
-	        !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1))))
+	      close = endLine.indexOf(endString);
+	    }
+	    var insideStart = Pos(start, open + 1), insideEnd = Pos(end, close + 1)
+	    if (close == -1 ||
+	        !/comment/.test(self.getTokenTypeAt(insideStart)) ||
+	        !/comment/.test(self.getTokenTypeAt(insideEnd)) ||
+	        self.getRange(insideStart, insideEnd, "\n").indexOf(endString) > -1)
 	      return false;
 
 	    // Avoid killing block comments completely outside the selection.
 	    // Positions of the last startString before the start of the selection, and the first endString after it.
 	    var lastStart = startLine.lastIndexOf(startString, from.ch);
 	    var firstEnd = lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
 	    if (lastStart != -1 && firstEnd != -1 && firstEnd + endString.length != from.ch) return false;
 	    // Positions of the first endString after the end of the selection, and the last startString before it.
@@ -10142,37 +10865,35 @@ var CodeMirror =
 	        self.replaceRange("", Pos(i, found), Pos(i, foundEnd));
 	      }
 	    });
 	    return true;
 	  });
 	});
 
 
-/***/ },
+/***/ }),
 /* 8 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
-	// TODO actually recognize syntax of TypeScript constructs
-
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
 	    define(["../../lib/codemirror"], mod);
 	  else // Plain browser env
 	    mod(CodeMirror);
 	})(function(CodeMirror) {
 	"use strict";
 
 	function expressionAllowed(stream, state, backUp) {
-	  return /^(?:operator|sof|keyword c|case|new|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
+	  return /^(?:operator|sof|keyword c|case|new|export|default|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
 	    (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
 	}
 
 	CodeMirror.defineMode("javascript", function(config, parserConfig) {
 	  var indentUnit = config.indentUnit;
 	  var statementIndent = parserConfig.statementIndent;
 	  var jsonldMode = parserConfig.jsonld;
 	  var jsonMode = parserConfig.json || jsonldMode;
@@ -10191,52 +10912,49 @@ var CodeMirror =
 	      "return": C, "break": C, "continue": C, "new": kw("new"), "delete": C, "throw": C, "debugger": C,
 	      "var": kw("var"), "const": kw("var"), "let": kw("var"),
 	      "function": kw("function"), "catch": kw("catch"),
 	      "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
 	      "in": operator, "typeof": operator, "instanceof": operator,
 	      "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
 	      "this": kw("this"), "class": kw("class"), "super": kw("atom"),
 	      "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
-	      "await": C, "async": kw("async")
+	      "await": C
 	    };
 
 	    // Extend the 'normal' keywords with the TypeScript language extensions
 	    if (isTS) {
-	      var type = {type: "variable", style: "variable-3"};
+	      var type = {type: "variable", style: "type"};
 	      var tsKeywords = {
 	        // object-like things
 	        "interface": kw("class"),
 	        "implements": C,
 	        "namespace": C,
 	        "module": kw("module"),
 	        "enum": kw("module"),
 
 	        // scope modifiers
 	        "public": kw("modifier"),
 	        "private": kw("modifier"),
 	        "protected": kw("modifier"),
 	        "abstract": kw("modifier"),
 
-	        // operators
-	        "as": operator,
-
 	        // types
 	        "string": type, "number": type, "boolean": type, "any": type
 	      };
 
 	      for (var attr in tsKeywords) {
 	        jsKeywords[attr] = tsKeywords[attr];
 	      }
 	    }
 
 	    return jsKeywords;
 	  }();
 
-	  var isOperatorChar = /[+\-*&%=<>!?|~^]/;
+	  var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
 	  var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
 
 	  function readRegexp(stream) {
 	    var escaped = false, next, inSet = false;
 	    while ((next = stream.next()) != null) {
 	      if (!escaped) {
 	        if (next == "/" && !inSet) return;
 	        if (next == "[") inSet = true;
@@ -10295,23 +11013,31 @@ var CodeMirror =
 	      }
 	    } else if (ch == "`") {
 	      state.tokenize = tokenQuasi;
 	      return tokenQuasi(stream, state);
 	    } else if (ch == "#") {
 	      stream.skipToEnd();
 	      return ret("error", "error");
 	    } else if (isOperatorChar.test(ch)) {
-	      stream.eatWhile(isOperatorChar);
+	      if (ch != ">" || !state.lexical || state.lexical.type != ">")
+	        stream.eatWhile(isOperatorChar);
 	      return ret("operator", "operator", stream.current());
 	    } else if (wordRE.test(ch)) {
 	      stream.eatWhile(wordRE);
-	      var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];
-	      return (known && state.lastType != ".") ? ret(known.type, known.style, word) :
-	                     ret("variable", "variable", word);
+	      var word = stream.current()
+	      if (state.lastType != ".") {
+	        if (keywords.propertyIsEnumerable(word)) {
+	          var kw = keywords[word]
+	          return ret(kw.type, kw.style, word)
+	        }
+	        if (word == "async" && stream.match(/^\s*[\(\w]/, false))
+	          return ret("async", "keyword", word)
+	      }
+	      return ret("variable", "variable", word)
 	    }
 	  }
 
 	  function tokenString(quote) {
 	    return function(stream, state) {
 	      var escaped = false, next;
 	      if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
 	        state.tokenize = tokenBase;
@@ -10358,23 +11084,28 @@ var CodeMirror =
 	  // (comments) in between. Fallback is to only notice when we hit the
 	  // arrow, and not declare the arguments as locals for the arrow
 	  // body.
 	  function findFatArrow(stream, state) {
 	    if (state.fatArrowAt) state.fatArrowAt = null;
 	    var arrow = stream.string.indexOf("=>", stream.start);
 	    if (arrow < 0) return;
 
+	    if (isTS) { // Try to skip TypeScript return type declarations after the arguments
+	      var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
+	      if (m) arrow = m.index
+	    }
+
 	    var depth = 0, sawSomething = false;
 	    for (var pos = arrow - 1; pos >= 0; --pos) {
 	      var ch = stream.string.charAt(pos);
 	      var bracket = brackets.indexOf(ch);
 	      if (bracket >= 0 && bracket < 3) {
 	        if (!depth) { ++pos; break; }
-	        if (--depth == 0) break;
+	        if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
 	      } else if (bracket >= 3 && bracket < 6) {
 	        ++depth;
 	      } else if (wordRE.test(ch)) {
 	        sawSomething = true;
 	      } else if (/["'\/]/.test(ch)) {
 	        return;
 	      } else if (sawSomething && !depth) {
 	        ++pos;
@@ -10493,59 +11224,72 @@ var CodeMirror =
 	      else if (wanted == ";") return pass();
 	      else return cont(exp);
 	    };
 	    return exp;
 	  }
 
 	  function statement(type, value) {
 	    if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
-	    if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);
+	    if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
 	    if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
 	    if (type == "{") return cont(pushlex("}"), block, poplex);
 	    if (type == ";") return cont();
 	    if (type == "if") {
 	      if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
 	        cx.state.cc.pop()();
-	      return cont(pushlex("form"), expression, statement, poplex, maybeelse);
+	      return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
 	    }
 	    if (type == "function") return cont(functiondef);
 	    if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
-	    if (type == "variable") return cont(pushlex("stat"), maybelabel);
-	    if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),
+	    if (type == "variable") {
+	      if (isTS && value == "type") {
+	        cx.marked = "keyword"
+	        return cont(typeexpr, expect("operator"), typeexpr, expect(";"));
+	      } else {
+	        return cont(pushlex("stat"), maybelabel);
+	      }
+	    }
+	    if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"),
 	                                      block, poplex, poplex);
 	    if (type == "case") return cont(expression, expect(":"));
 	    if (type == "default") return cont(expect(":"));
 	    if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
 	                                     statement, poplex, popcontext);
 	    if (type == "class") return cont(pushlex("form"), className, poplex);
 	    if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
 	    if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
-	    if (type == "module") return cont(pushlex("form"), pattern, pushlex("}"), expect("{"), block, poplex, poplex)
+	    if (type == "module") return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
 	    if (type == "async") return cont(statement)
+	    if (value == "@") return cont(expression, statement)
 	    return pass(pushlex("stat"), expression, expect(";"), poplex);
 	  }
 	  function expression(type) {
 	    return expressionInner(type, false);
 	  }
 	  function expressionNoComma(type) {
 	    return expressionInner(type, true);
 	  }
+	  function parenExpr(type) {
+	    if (type != "(") return pass()
+	    return cont(pushlex(")"), expression, expect(")"), poplex)
+	  }
 	  function expressionInner(type, noComma) {
 	    if (cx.state.fatArrowAt == cx.stream.start) {
 	      var body = noComma ? arrowBodyNoComma : arrowBody;
 	      if (type == "(") return cont(pushcontext, pushlex(")"), commasep(pattern, ")"), poplex, expect("=>"), body, popcontext);
 	      else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
 	    }
 
 	    var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
 	    if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
 	    if (type == "function") return cont(functiondef, maybeop);
-	    if (type == "keyword c") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
-	    if (type == "(") return cont(pushlex(")"), maybeexpression, comprehension, expect(")"), poplex, maybeop);
+	    if (type == "class") return cont(pushlex("form"), classExpression, poplex);
+	    if (type == "keyword c" || type == "async") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
+	    if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
 	    if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
 	    if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
 	    if (type == "{") return contCommasep(objprop, "}", null, maybeop);
 	    if (type == "quasi") return pass(quasi, maybeop);
 	    if (type == "new") return cont(maybeTarget(noComma));
 	    return cont();
 	  }
 	  function maybeexpression(type) {
@@ -10570,16 +11314,17 @@ var CodeMirror =
 	      if (value == "?") return cont(expression, expect(":"), expr);
 	      return cont(expr);
 	    }
 	    if (type == "quasi") { return pass(quasi, me); }
 	    if (type == ";") return;
 	    if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
 	    if (type == ".") return cont(property, me);
 	    if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
+	    if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
 	  }
 	  function quasi(type, value) {
 	    if (type != "quasi") return pass();
 	    if (value.slice(value.length - 2) != "${") return cont(quasi);
 	    return cont(expression, continueQuasi);
 	  }
 	  function continueQuasi(type) {
 	    if (type == "}") {
@@ -10611,48 +11356,56 @@ var CodeMirror =
 	  function maybelabel(type) {
 	    if (type == ":") return cont(poplex, statement);
 	    return pass(maybeoperatorComma, expect(";"), poplex);
 	  }
 	  function property(type) {
 	    if (type == "variable") {cx.marked = "property"; return cont();}
 	  }
 	  function objprop(type, value) {
-	    if (type == "variable" || cx.style == "keyword") {
+	    if (type == "async") {
+	      cx.marked = "property";
+	      return cont(objprop);
+	    } else if (type == "variable" || cx.style == "keyword") {
 	      cx.marked = "property";
 	      if (value == "get" || value == "set") return cont(getterSetter);
 	      return cont(afterprop);
 	    } else if (type == "number" || type == "string") {
 	      cx.marked = jsonldMode ? "property" : (cx.style + " property");
 	      return cont(afterprop);
 	    } else if (type == "jsonld-keyword") {
 	      return cont(afterprop);
 	    } else if (type == "modifier") {
 	      return cont(objprop)
 	    } else if (type == "[") {
 	      return cont(expression, expect("]"), afterprop);
 	    } else if (type == "spread") {
-	      return cont(expression);
+	      return cont(expression, afterprop);
+	    } else if (type == ":") {
+	      return pass(afterprop)
 	    }
 	  }
 	  function getterSetter(type) {
 	    if (type != "variable") return pass(afterprop);
 	    cx.marked = "property";
 	    return cont(functiondef);
 	  }
 	  function afterprop(type) {
 	    if (type == ":") return cont(expressionNoComma);
 	    if (type == "(") return pass(functiondef);
 	  }
-	  function commasep(what, end) {
+	  function commasep(what, end, sep) {
 	    function proceed(type, value) {
-	      if (type == ",") {
+	      if (sep ? sep.indexOf(type) > -1 : type == ",") {
 	        var lex = cx.state.lexical;
 	        if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
-	        return cont(what, proceed);
+	        return cont(function(type, value) {
+	          if (type == end || value == end) return pass()
+	          return pass(what)
+	        }, proceed);
 	      }
 	      if (type == end || value == end) return cont();
 	      return cont(expect(end));
 	    }
 	    return function(type, value) {
 	      if (type == end || value == end) return cont();
 	      return pass(what, proceed);
 	    };
@@ -10661,28 +11414,52 @@ var CodeMirror =
 	    for (var i = 3; i < arguments.length; i++)
 	      cx.cc.push(arguments[i]);
 	    return cont(pushlex(end, info), commasep(what, end), poplex);
 	  }
 	  function block(type) {
 	    if (type == "}") return cont();
 	    return pass(statement, block);
 	  }
-	  function maybetype(type) {
-	    if (isTS && type == ":") return cont(typeexpr);
-	  }
-	  function maybedefault(_, value) {
-	    if (value == "=") return cont(expressionNoComma);
+	  function maybetype(type, value) {
+	    if (isTS) {
+	      if (type == ":") return cont(typeexpr);
+	      if (value == "?") return cont(maybetype);
+	    }
 	  }
 	  function typeexpr(type) {
-	    if (type == "variable") {cx.marked = "variable-3"; return cont(afterType);}
+	    if (type == "variable") {cx.marked = "type"; return cont(afterType);}
+	    if (type == "string" || type == "number" || type == "atom") return cont(afterType);
+	    if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
+	    if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType)
+	  }
+	  function maybeReturnType(type) {
+	    if (type == "=>") return cont(typeexpr)
+	  }
+	  function typeprop(type, value) {
+	    if (type == "variable" || cx.style == "keyword") {
+	      cx.marked = "property"
+	      return cont(typeprop)
+	    } else if (value == "?") {
+	      return cont(typeprop)
+	    } else if (type == ":") {
+	      return cont(typeexpr)
+	    } else if (type == "[") {
+	      return cont(expression, maybetype, expect("]"), typeprop)
+	    }
+	  }
+	  function typearg(type) {
+	    if (type == "variable") return cont(typearg)
+	    else if (type == ":") return cont(typeexpr)
 	  }
 	  function afterType(type, value) {
-	    if (value == "<") return cont(commasep(typeexpr, ">"), afterType)
+	    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
+	    if (value == "|" || type == ".") return cont(typeexpr)
 	    if (type == "[") return cont(expect("]"), afterType)
+	    if (value == "extends") return cont(typeexpr)
 	  }
 	  function vardef() {
 	    return pass(pattern, maybetype, maybeAssign, vardefCont);
 	  }
 	  function pattern(type, value) {
 	    if (type == "modifier") return cont(pattern)
 	    if (type == "variable") { register(value); return cont(); }
 	    if (type == "spread") return cont(pattern);
@@ -10728,84 +11505,96 @@ var CodeMirror =
 	  }
 	  function forspec3(type) {
 	    if (type != ")") cont(expression);
 	  }
 	  function functiondef(type, value) {
 	    if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
 	    if (type == "variable") {register(value); return cont(functiondef);}
 	    if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, maybetype, statement, popcontext);
+	    if (isTS && value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, functiondef)
 	  }
 	  function funarg(type) {
 	    if (type == "spread") return cont(funarg);
-	    return pass(pattern, maybetype, maybedefault);
+	    return pass(pattern, maybetype, maybeAssign);
+	  }
+	  function classExpression(type, value) {
+	    // Class expressions may have an optional name.
+	    if (type == "variable") return className(type, value);
+	    return classNameAfter(type, value);
 	  }
 	  function className(type, value) {
 	    if (type == "variable") {register(value); return cont(classNameAfter);}
 	  }
 	  function classNameAfter(type, value) {
-	    if (value == "extends") return cont(expression, classNameAfter);
+	    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, classNameAfter)
+	    if (value == "extends" || value == "implements" || (isTS && type == ","))
+	      return cont(isTS ? typeexpr : expression, classNameAfter);
 	    if (type == "{") return cont(pushlex("}"), classBody, poplex);
 	  }
 	  function classBody(type, value) {
 	    if (type == "variable" || cx.style == "keyword") {
-	      if (value == "static") {
+	      if ((value == "async" || value == "static" || value == "get" || value == "set" ||
+	           (isTS && (value == "public" || value == "private" || value == "protected" || value == "readonly" || value == "abstract"))) &&
+	          cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false)) {
 	        cx.marked = "keyword";
 	        return cont(classBody);
 	      }
 	      cx.marked = "property";
-	      if (value == "get" || value == "set") return cont(classGetterSetter, functiondef, classBody);
-	      return cont(functiondef, classBody);
-	    }
+	      return cont(isTS ? classfield : functiondef, classBody);
+	    }
+	    if (type == "[")
+	      return cont(expression, expect("]"), isTS ? classfield : functiondef, classBody)
 	    if (value == "*") {
 	      cx.marked = "keyword";
 	      return cont(classBody);
 	    }
 	    if (type == ";") return cont(classBody);
 	    if (type == "}") return cont();
-	  }
-	  function classGetterSetter(type) {
-	    if (type != "variable") return pass();
-	    cx.marked = "property";
-	    return cont();
-	  }
-	  function afterExport(_type, value) {
+	    if (value == "@") return cont(expression, classBody)
+	  }
+	  function classfield(type, value) {
+	    if (value == "?") return cont(classfield)
+	    if (type == ":") return cont(typeexpr, maybeAssign)
+	    if (value == "=") return cont(expressionNoComma)
+	    return pass(functiondef)
+	  }
+	  function afterExport(type, value) {
 	    if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
 	    if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
+	    if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
 	    return pass(statement);
 	  }
+	  function exportField(type, value) {
+	    if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
+	    if (type == "variable") return pass(expressionNoComma, exportField);
+	  }
 	  function afterImport(type) {
 	    if (type == "string") return cont();
-	    return pass(importSpec, maybeFrom);
+	    return pass(importSpec, maybeMoreImports, maybeFrom);
 	  }
 	  function importSpec(type, value) {
 	    if (type == "{") return contCommasep(importSpec, "}");
 	    if (type == "variable") register(value);
 	    if (value == "*") cx.marked = "keyword";
 	    return cont(maybeAs);
 	  }
+	  function maybeMoreImports(type) {
+	    if (type == ",") return cont(importSpec, maybeMoreImports)
+	  }
 	  function maybeAs(_type, value) {
 	    if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
 	  }
 	  function maybeFrom(_type, value) {
 	    if (value == "from") { cx.marked = "keyword"; return cont(expression); }
 	  }
 	  function arrayLiteral(type) {
 	    if (type == "]") return cont();
-	    return pass(expressionNoComma, maybeArrayComprehension);
-	  }
-	  function maybeArrayComprehension(type) {
-	    if (type == "for") return pass(comprehension, expect("]"));
-	    if (type == ",") return cont(commasep(maybeexpressionNoComma, "]"));
 	    return pass(commasep(expressionNoComma, "]"));
 	  }
-	  function comprehension(type) {
-	    if (type == "for") return cont(forspec, comprehension);
-	    if (type == "if") return cont(expression, comprehension);
-	  }
 
 	  function isContinuedStatement(state, textAfter) {
 	    return state.lastType == "operator" || state.lastType == "," ||
 	      isOperatorChar.test(textAfter.charAt(0)) ||
 	      /[,.]/.test(textAfter.charAt(0));
 	  }
 
 	  // Interface
@@ -10838,24 +11627,28 @@ var CodeMirror =
 	      if (type == "comment") return style;
 	      state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
 	      return parseJS(state, style, type, content, stream);
 	    },
 
 	    indent: function(state, textAfter) {
 	      if (state.tokenize == tokenComment) return CodeMirror.Pass;
 	      if (state.tokenize != tokenBase) return 0;
-	      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical;
+	      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
 	      // Kludge to prevent 'maybelse' from blocking lexical scope pops
 	      if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
 	        var c = state.cc[i];
 	        if (c == poplex) lexical = lexical.prev;
 	        else if (c != maybeelse) break;
 	      }
-	      if (lexical.type == "stat" && firstChar == "}") lexical = lexical.prev;
+	      while ((lexical.type == "stat" || lexical.type == "form") &&
+	             (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
+	                                   (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
+	                                   !/^[,\.=+\-*:?[\(]/.test(textAfter))))
+	        lexical = lexical.prev;
 	      if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
 	        lexical = lexical.prev;
 	      var type = lexical.type, closing = firstChar == type;
 
 	      if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0);
 	      else if (type == "form" && firstChar == "{") return lexical.indented;
 	      else if (type == "form") return lexical.indented + indentUnit;
 	      else if (type == "stat")
@@ -10896,19 +11689,19 @@ var CodeMirror =
 	CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
 	CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
 	CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
 	CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 9 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -11296,19 +12089,19 @@ var CodeMirror =
 	CodeMirror.defineMIME("text/xml", "xml");
 	CodeMirror.defineMIME("application/xml", "xml");
 	if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
 	  CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 10 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -11330,16 +12123,17 @@ var CodeMirror =
 	      mediaValueKeywords = parserConfig.mediaValueKeywords || {},
 	      propertyKeywords = parserConfig.propertyKeywords || {},
 	      nonStandardPropertyKeywords = parserConfig.nonStandardPropertyKeywords || {},
 	      fontProperties = parserConfig.fontProperties || {},
 	      counterDescriptors = parserConfig.counterDescriptors || {},
 	      colorKeywords = parserConfig.colorKeywords || {},
 	      valueKeywords = parserConfig.valueKeywords || {},
 	      allowNested = parserConfig.allowNested,
+	      lineComment = parserConfig.lineComment,
 	      supportsAtComponent = parserConfig.supportsAtComponent === true;
 
 	  var type, override;
 	  function ret(style, tp) { type = tp; return style; }
 
 	  // Tokenizers
 
 	  function tokenBase(stream, state) {
@@ -11555,16 +12349,18 @@ var CodeMirror =
 	    if (type == ")") return popContext(state);
 	    if (type == "(") return pushContext(state, stream, "parens");
 	    if (type == "interpolation") return pushContext(state, stream, "interpolation");
 	    if (type == "word") wordAsValue(stream);
 	    return "parens";
 	  };
 
 	  states.pseudo = function(type, stream, state) {
+	    if (type == "meta") return "pseudo";
+
 	    if (type == "word") {
 	      override = "variable-3";
 	      return state.context.type;
 	    }
 	    return pass(type, stream, state);
 	  };
 
 	  states.documentTypes = function(type, stream, state) {
@@ -11700,33 +12496,33 @@ var CodeMirror =
 	                          cx.type == "interpolation" || cx.type == "restricted_atBlock")) {
 	          // Resume indentation from parent context.
 	          cx = cx.prev;
 	          indent = cx.indent;
 	        } else if (ch == ")" && (cx.type == "parens" || cx.type == "atBlock_parens") ||
 	            ch == "{" && (cx.type == "at" || cx.type == "atBlock")) {
 	          // Dedent relative to current context.
 	          indent = Math.max(0, cx.indent - indentUnit);
-	          cx = cx.prev;
 	        }
 	      }
 	      return indent;
 	    },
 
 	    electricChars: "}",
 	    blockCommentStart: "/*",
 	    blockCommentEnd: "*/",
+	    lineComment: lineComment,
 	    fold: "brace"
 	  };
 	});
 
 	  function keySet(array) {
 	    var keys = {};
 	    for (var i = 0; i < array.length; ++i) {
-	      keys[array[i]] = true;
+	      keys[array[i].toLowerCase()] = true;
 	    }
 	    return keys;
 	  }
 
 	  var documentTypes_ = [
 	    "domain", "regexp", "url", "url-prefix"
 	  ], documentTypes = keySet(documentTypes_);
 
@@ -11770,17 +12566,17 @@ var CodeMirror =
 	    "border-image-repeat", "border-image-slice", "border-image-source",
 	    "border-image-width", "border-left", "border-left-color",
 	    "border-left-style", "border-left-width", "border-radius", "border-right",
 	    "border-right-color", "border-right-style", "border-right-width",
 	    "border-spacing", "border-style", "border-top", "border-top-color",
 	    "border-top-left-radius", "border-top-right-radius", "border-top-style",
 	    "border-top-width", "border-width", "bottom", "box-decoration-break",
 	    "box-shadow", "box-sizing", "break-after", "break-before", "break-inside",
-	    "caption-side", "clear", "clip", "color", "color-profile", "column-count",
+	    "caption-side", "caret-color", "clear", "clip", "color", "color-profile", "column-count",
 	    "column-fill", "column-gap", "column-rule", "column-rule-color",
 	    "column-rule-style", "column-rule-width", "column-span", "column-width",
 	    "columns", "content", "counter-increment", "counter-reset", "crop", "cue",
 	    "cue-after", "cue-before", "cursor", "direction", "display",
 	    "dominant-baseline", "drop-initial-after-adjust",
 	    "drop-initial-after-align", "drop-initial-before-adjust",
 	    "drop-initial-before-align", "drop-initial-size", "drop-initial-value",
 	    "elevation", "empty-cells", "fit", "fit-position", "flex", "flex-basis",
@@ -11791,32 +12587,32 @@ var CodeMirror =
 	    "font-variant-alternates", "font-variant-caps", "font-variant-east-asian",
 	    "font-variant-ligatures", "font-variant-numeric", "font-variant-position",
 	    "font-weight", "grid", "grid-area", "grid-auto-columns", "grid-auto-flow",
 	    "grid-auto-rows", "grid-column", "grid-column-end", "grid-column-gap",
 	    "grid-column-start", "grid-gap", "grid-row", "grid-row-end", "grid-row-gap",
 	    "grid-row-start", "grid-template", "grid-template-areas", "grid-template-columns",
 	    "grid-template-rows", "hanging-punctuation", "height", "hyphens",
 	    "icon", "image-orientation", "image-rendering", "image-resolution",
-	    "inline-box-align", "justify-content", "left", "letter-spacing",
+	    "inline-box-align", "justify-content", "justify-items", "justify-self", "left", "letter-spacing",
 	    "line-break", "line-height", "line-stacking", "line-stacking-ruby",
 	    "line-stacking-shift", "line-stacking-strategy", "list-style",
 	    "list-style-image", "list-style-position", "list-style-type", "margin",
 	    "margin-bottom", "margin-left", "margin-right", "margin-top",
 	    "marks", "marquee-direction", "marquee-loop",
 	    "marquee-play-count", "marquee-speed", "marquee-style", "max-height",
 	    "max-width", "min-height", "min-width", "move-to", "nav-down", "nav-index",
 	    "nav-left", "nav-right", "nav-up", "object-fit", "object-position",
 	    "opacity", "order", "orphans", "outline",
 	    "outline-color", "outline-offset", "outline-style", "outline-width",
 	    "overflow", "overflow-style", "overflow-wrap", "overflow-x", "overflow-y",
 	    "padding", "padding-bottom", "padding-left", "padding-right", "padding-top",
 	    "page", "page-break-after", "page-break-before", "page-break-inside",
 	    "page-policy", "pause", "pause-after", "pause-before", "perspective",
-	    "perspective-origin", "pitch", "pitch-range", "play-during", "position",
+	    "perspective-origin", "pitch", "pitch-range", "place-content", "place-items", "place-self", "play-during", "position",
 	    "presentation-level", "punctuation-trim", "quotes", "region-break-after",
 	    "region-break-before", "region-break-inside", "region-fragment",
 	    "rendering-intent", "resize", "rest", "rest-after", "rest-before", "richness",
 	    "right", "rotation", "rotation-point", "ruby-align", "ruby-overhang",
 	    "ruby-position", "ruby-span", "shape-image-threshold", "shape-inside", "shape-margin",
 	    "shape-outside", "size", "speak", "speak-as", "speak-header",
 	    "speak-numeral", "speak-punctuation", "speech-rate", "stress", "string-set",
 	    "tab-size", "table-layout", "target", "target-name", "target-new",
@@ -11824,19 +12620,19 @@ var CodeMirror =
 	    "text-decoration-color", "text-decoration-line", "text-decoration-skip",
 	    "text-decoration-style", "text-emphasis", "text-emphasis-color",
 	    "text-emphasis-position", "text-emphasis-style", "text-height",
 	    "text-indent", "text-justify", "text-outline", "text-overflow", "text-shadow",
 	    "text-size-adjust", "text-space-collapse", "text-transform", "text-underline-position",
 	    "text-wrap", "top", "transform", "transform-origin", "transform-style",
 	    "transition", "transition-delay", "transition-duration",
 	    "transition-property", "transition-timing-function", "unicode-bidi",
-	    "vertical-align", "visibility", "voice-balance", "voice-duration",
+	    "user-select", "vertical-align", "visibility", "voice-balance", "voice-duration",
 	    "voice-family", "voice-pitch", "voice-range", "voice-rate", "voice-stress",
-	    "voice-volume", "volume", "white-space", "widows", "width", "word-break",
+	    "voice-volume", "volume", "white-space", "widows", "width", "will-change", "word-break",
 	    "word-spacing", "word-wrap", "z-index",
 	    // SVG-specific
 	    "clip-path", "clip-rule", "mask", "enable-background", "filter", "flood-color",
 	    "flood-opacity", "lighting-color", "stop-color", "stop-opacity", "pointer-events",
 	    "color-interpolation", "color-interpolation-filters",
 	    "color-rendering", "fill", "fill-opacity", "fill-rule", "image-rendering",
 	    "marker", "marker-end", "marker-mid", "marker-start", "shape-rendering", "stroke",
 	    "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin",
@@ -11891,26 +12687,26 @@ var CodeMirror =
 	    "teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white",
 	    "whitesmoke", "yellow", "yellowgreen"
 	  ], colorKeywords = keySet(colorKeywords_);
 
 	  var valueKeywords_ = [
 	    "above", "absolute", "activeborder", "additive", "activecaption", "afar",
 	    "after-white-space", "ahead", "alias", "all", "all-scroll", "alphabetic", "alternate",
 	    "always", "amharic", "amharic-abegede", "antialiased", "appworkspace",
-	    "arabic-indic", "armenian", "asterisks", "attr", "auto", "avoid", "avoid-column", "avoid-page",
+	    "arabic-indic", "armenian", "asterisks", "attr", "auto", "auto-flow", "avoid", "avoid-column", "avoid-page",
 	    "avoid-region", "background", "backwards", "baseline", "below", "bidi-override", "binary",
 	    "bengali", "blink", "block", "block-axis", "bold", "bolder", "border", "border-box",
 	    "both", "bottom", "break", "break-all", "break-word", "bullets", "button", "button-bevel",
 	    "buttonface", "buttonhighlight", "buttonshadow", "buttontext", "calc", "cambodian",
 	    "capitalize", "caps-lock-indicator", "caption", "captiontext", "caret",
 	    "cell", "center", "checkbox", "circle", "cjk-decimal", "cjk-earthly-branch",
 	    "cjk-heavenly-stem", "cjk-ideographic", "clear", "clip", "close-quote",
 	    "col-resize", "collapse", "color", "color-burn", "color-dodge", "column", "column-reverse",
-	    "compact", "condensed", "contain", "content",
+	    "compact", "condensed", "contain", "content", "contents",
 	    "content-box", "context-menu", "continuous", "copy", "counter", "counters", "cover", "crop",
 	    "cross", "crosshair", "currentcolor", "cursive", "cyclic", "darken", "dashed", "decimal",
 	    "decimal-leading-zero", "default", "default-button", "dense", "destination-atop",
 	    "destination-in", "destination-out", "destination-over", "devanagari", "difference",
 	    "disc", "discard", "disclosure-closed", "disclosure-open", "document",
 	    "dot-dash", "dot-dot-dash",
 	    "dotted", "double", "down", "e-resize", "ease", "ease-in", "ease-in-out", "ease-out",
 	    "element", "ellipse", "ellipsis", "embed", "end", "ethiopic", "ethiopic-abegede",
@@ -11943,49 +12739,49 @@ var CodeMirror =
 	    "media-seek-back-button", "media-seek-forward-button", "media-slider",
 	    "media-sliderthumb", "media-time-remaining-display", "media-volume-slider",
 	    "media-volume-slider-container", "media-volume-sliderthumb", "medium",
 	    "menu", "menulist", "menulist-button", "menulist-text",
 	    "menulist-textfield", "menutext", "message-box", "middle", "min-intrinsic",
 	    "mix", "mongolian", "monospace", "move", "multiple", "multiply", "myanmar", "n-resize",
 	    "narrower", "ne-resize", "nesw-resize", "no-close-quote", "no-drop",
 	    "no-open-quote", "no-repeat", "none", "normal", "not-allowed", "nowrap",
-	    "ns-resize", "numbers", "numeric", "nw-resize", "nwse-resize", "oblique", "octal", "open-quote",
+	    "ns-resize", "numbers", "numeric", "nw-resize", "nwse-resize", "oblique", "octal", "opacity", "open-quote",
 	    "optimizeLegibility", "optimizeSpeed", "oriya", "oromo", "outset",
 	    "outside", "outside-shape", "overlay", "overline", "padding", "padding-box",
 	    "painted", "page", "paused", "persian", "perspective", "plus-darker", "plus-lighter",
 	    "pointer", "polygon", "portrait", "pre", "pre-line", "pre-wrap", "preserve-3d",
 	    "progress", "push-button", "radial-gradient", "radio", "read-only",
 	    "read-write", "read-write-plaintext-only", "rectangle", "region",
 	    "relative", "repeat", "repeating-linear-gradient",
 	    "repeating-radial-gradient", "repeat-x", "repeat-y", "reset", "reverse",
 	    "rgb", "rgba", "ridge", "right", "rotate", "rotate3d", "rotateX", "rotateY",
 	    "rotateZ", "round", "row", "row-resize", "row-reverse", "rtl", "run-in", "running",
 	    "s-resize", "sans-serif", "saturation", "scale", "scale3d", "scaleX", "scaleY", "scaleZ", "screen",
-	    "scroll", "scrollbar", "se-resize", "searchfield",
+	    "scroll", "scrollbar", "scroll-position", "se-resize", "searchfield",
 	    "searchfield-cancel-button", "searchfield-decoration",
-	    "searchfield-results-button", "searchfield-results-decoration",
+	    "searchfield-results-button", "searchfield-results-decoration", "self-start", "self-end",
 	    "semi-condensed", "semi-expanded", "separate", "serif", "show", "sidama",
 	    "simp-chinese-formal", "simp-chinese-informal", "single",
 	    "skew", "skewX", "skewY", "skip-white-space", "slide", "slider-horizontal",
 	    "slider-vertical", "sliderthumb-horizontal", "sliderthumb-vertical", "slow",
 	    "small", "small-caps", "small-caption", "smaller", "soft-light", "solid", "somali",
-	    "source-atop", "source-in", "source-out", "source-over", "space", "space-around", "space-between", "spell-out", "square",
+	    "source-atop", "source-in", "source-out", "source-over", "space", "space-around", "space-between", "space-evenly", "spell-out", "square",
 	    "square-button", "start", "static", "status-bar", "stretch", "stroke", "sub",
-	    "subpixel-antialiased", "super", "sw-resize", "symbolic", "symbols", "table",
+	    "subpixel-antialiased", "super", "sw-resize", "symbolic", "symbols", "system-ui", "table",
 	    "table-caption", "table-cell", "table-column", "table-column-group",
 	    "table-footer-group", "table-header-group", "table-row", "table-row-group",
 	    "tamil",
 	    "telugu", "text", "text-bottom", "text-top", "textarea", "textfield", "thai",
 	    "thick", "thin", "threeddarkshadow", "threedface", "threedhighlight",
 	    "threedlightshadow", "threedshadow", "tibetan", "tigre", "tigrinya-er",
 	    "tigrinya-er-abegede", "tigrinya-et", "tigrinya-et-abegede", "to", "top",
-	    "trad-chinese-formal", "trad-chinese-informal",
+	    "trad-chinese-formal", "trad-chinese-informal", "transform",
 	    "translate", "translate3d", "translateX", "translateY", "translateZ",
-	    "transparent", "ultra-condensed", "ultra-expanded", "underline", "up",
+	    "transparent", "ultra-condensed", "ultra-expanded", "underline", "unset", "up",
 	    "upper-alpha", "upper-armenian", "upper-greek", "upper-hexadecimal",
 	    "upper-latin", "upper-norwegian", "upper-roman", "uppercase", "urdu", "url",
 	    "var", "vertical", "vertical-text", "visible", "visibleFill", "visiblePainted",
 	    "visibleStroke", "visual", "w-resize", "wait", "wave", "wider",
 	    "window", "windowframe", "windowtext", "words", "wrap", "wrap-reverse", "x-large", "x-small", "xor",
 	    "xx-large", "xx-small"
 	  ], valueKeywords = keySet(valueKeywords_);
 
@@ -12032,31 +12828,32 @@ var CodeMirror =
 	    mediaFeatures: mediaFeatures,
 	    mediaValueKeywords: mediaValueKeywords,
 	    propertyKeywords: propertyKeywords,
 	    nonStandardPropertyKeywords: nonStandardPropertyKeywords,
 	    colorKeywords: colorKeywords,
 	    valueKeywords: valueKeywords,
 	    fontProperties: fontProperties,
 	    allowNested: true,
+	    lineComment: "//",
 	    tokenHooks: {
 	      "/": function(stream, state) {
 	        if (stream.eat("/")) {
 	          stream.skipToEnd();
 	          return ["comment", "comment"];
 	        } else if (stream.eat("*")) {
 	          state.tokenize = tokenCComment;
 	          return tokenCComment(stream, state);
 	        } else {
 	          return ["operator", "operator"];
 	        }
 	      },
 	      ":": function(stream) {
-	        if (stream.match(/\s*\{/))
-	          return [null, "{"];
+	        if (stream.match(/\s*\{/, false))
+	          return [null, null]
 	        return false;
 	      },
 	      "$": function(stream) {
 	        stream.match(/^[\w-]+/);
 	        if (stream.match(/^\s*:/, false))
 	          return ["variable-2", "variable-definition"];
 	        return ["variable-2", "variable"];
 	      },
@@ -12074,16 +12871,17 @@ var CodeMirror =
 	    mediaFeatures: mediaFeatures,
 	    mediaValueKeywords: mediaValueKeywords,
 	    propertyKeywords: propertyKeywords,
 	    nonStandardPropertyKeywords: nonStandardPropertyKeywords,
 	    colorKeywords: colorKeywords,
 	    valueKeywords: valueKeywords,
 	    fontProperties: fontProperties,
 	    allowNested: true,
+	    lineComment: "//",
 	    tokenHooks: {
 	      "/": function(stream, state) {
 	        if (stream.eat("/")) {
 	          stream.skipToEnd();
 	          return ["comment", "comment"];
 	        } else if (stream.eat("*")) {
 	          state.tokenize = tokenCComment;
 	          return tokenCComment(stream, state);
@@ -12127,19 +12925,19 @@ var CodeMirror =
 	    },
 	    name: "css",
 	    helperType: "gss"
 	  });
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 11 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2), __webpack_require__(9), __webpack_require__(8), __webpack_require__(10));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -12147,17 +12945,17 @@ var CodeMirror =
 	  else // Plain browser env
 	    mod(CodeMirror);
 	})(function(CodeMirror) {
 	  "use strict";
 
 	  var defaultTags = {
 	    script: [
 	      ["lang", /(javascript|babel)/i, "javascript"],
-	      ["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^$/i, "javascript"],
+	      ["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^module$|^$/i, "javascript"],
 	      ["type", /./, "text/plain"],
 	      [null, null, "javascript"]
 	    ],
 	    style:  [
 	      ["lang", /^css$/i, "css"],
 	      ["type", /^(text\/)?(x-)?(stylesheet|css)$/i, "css"],
 	      ["type", /./, "text/plain"],
 	      [null, null, "css"]
@@ -12179,17 +12977,17 @@ var CodeMirror =
 	  function getAttrRegexp(attr) {
 	    var regexp = attrRegexpCache[attr];
 	    if (regexp) return regexp;
 	    return attrRegexpCache[attr] = new RegExp("\\s+" + attr + "\\s*=\\s*('|\")?([^'\"]+)('|\")?\\s*");
 	  }
 
 	  function getAttrValue(text, attr) {
 	    var match = text.match(getAttrRegexp(attr))
-	    return match ? match[2] : ""
+	    return match ? /^\s*(.*?)\s*$/.exec(match[2])[1] : ""
 	  }
 
 	  function getTagRegexp(tagName, anchored) {
 	    return new RegExp((anchored ? "^" : "") + "<\/\s*" + tagName + "\s*>", "i");
 	  }
 
 	  function addTags(from, to) {
 	    for (var tag in from) {
@@ -12266,38 +13064,38 @@ var CodeMirror =
 	                localMode: state.localMode, localState: local,
 	                htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};
 	      },
 
 	      token: function (stream, state) {
 	        return state.token(stream, state);
 	      },
 
-	      indent: function (state, textAfter) {
+	      indent: function (state, textAfter, line) {
 	        if (!state.localMode || /^\s*<\//.test(textAfter))
 	          return htmlMode.indent(state.htmlState, textAfter);
 	        else if (state.localMode.indent)
-	          return state.localMode.indent(state.localState, textAfter);
+	          return state.localMode.indent(state.localState, textAfter, line);
 	        else
 	          return CodeMirror.Pass;
 	      },
 
 	      innerMode: function (state) {
 	        return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode};
 	      }
 	    };
 	  }, "xml", "javascript", "css");
 
 	  CodeMirror.defineMIME("text/html", "htmlmixed");
 	});
 
 
-/***/ },
+/***/ }),
 /* 12 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2), __webpack_require__(9), __webpack_require__(8))
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -12439,19 +13237,19 @@ var CodeMirror =
 	    }
 	  }, "xml", "javascript")
 
 	  CodeMirror.defineMIME("text/jsx", "jsx")
 	  CodeMirror.defineMIME("text/typescript-jsx", {name: "jsx", base: {name: "javascript", typescript: true}})
 	});
 
 
-/***/ },
+/***/ }),
 /* 13 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	/**
 	 * Link to the project's GitHub page:
 	 * https://github.com/pickhardt/coffeescript-codemirror-mode
 	 */
@@ -12800,19 +13598,19 @@ var CodeMirror =
 	});
 
 	CodeMirror.defineMIME("text/x-coffeescript", "coffeescript");
 	CodeMirror.defineMIME("text/coffeescript", "coffeescript");
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 14 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -12876,17 +13674,17 @@ var CodeMirror =
 	          if (source.eat('.'))
 	            return "qualifier";
 	          return "variable-2";
 	        }
 
 	        if (smallRE.test(ch)) {
 	          var isDef = source.pos === 1;
 	          source.eatWhile(idRE);
-	          return isDef ? "variable-3" : "variable";
+	          return isDef ? "type" : "variable";
 	        }
 
 	        if (digitRE.test(ch)) {
 	          if (ch == '0') {
 	            if (source.eat(/[xX]/)) {
 	              source.eatWhile(hexitRE); // should require at least 1
 	              return "integer";
 	            }
@@ -13011,19 +13809,19 @@ var CodeMirror =
 	    };
 
 	  });
 
 	  CodeMirror.defineMIME("text/x-elm", "elm");
 	});
 
 
-/***/ },
+/***/ }),
 /* 15 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -13038,29 +13836,29 @@ var CodeMirror =
 	  this.column = column;
 	  this.type = type;
 	  this.info = info;
 	  this.align = align;
 	  this.prev = prev;
 	}
 	function pushContext(state, col, type, info) {
 	  var indent = state.indented;
-	  if (state.context && state.context.type != "statement" && type != "statement")
+	  if (state.context && state.context.type == "statement" && type != "statement")
 	    indent = state.context.indented;
 	  return state.context = new Context(indent, col, type, info, null, state.context);
 	}
 	function popContext(state) {
 	  var t = state.context.type;
 	  if (t == ")" || t == "]" || t == "}")
 	    state.indented = state.context.indented;
 	  return state.context = state.context.prev;
 	}
 
 	function typeBefore(stream, state, pos) {
-	  if (state.prevToken == "variable" || state.prevToken == "variable-3") return true;
+	  if (state.prevToken == "variable" || state.prevToken == "type") return true;
 	  if (/\S(?:[^- ]>|[*\]])\s*$|\*$/.test(stream.string.slice(0, pos))) return true;
 	  if (state.typeAtEndOfLine && stream.column() == stream.indentation()) return true;
 	}
 
 	function isTopScope(context) {
 	  for (;;) {
 	    if (!context || context.type == "top") return true;
 	    if (context.type == "}" && context.prev.info != "namespace") return false;
@@ -13082,17 +13880,17 @@ var CodeMirror =
 	      multiLineStrings = parserConfig.multiLineStrings,
 	      indentStatements = parserConfig.indentStatements !== false,
 	      indentSwitch = parserConfig.indentSwitch !== false,
 	      namespaceSeparator = parserConfig.namespaceSeparator,
 	      isPunctuationChar = parserConfig.isPunctuationChar || /[\[\]{}\(\),;\:\.]/,
 	      numberStart = parserConfig.numberStart || /[\d\.]/,
 	      number = parserConfig.number || /^(?:0x[a-f\d]+|0b[01]+|(?:\d+\.?\d*|\.\d+)(?:e[-+]?\d+)?)(u|ll?|l|f)?/i,
 	      isOperatorChar = parserConfig.isOperatorChar || /[+\-*&%=<>!?|\/]/,
-	      endStatement = parserConfig.endStatement || /^[;:,]$/;
+	      isIdentifierChar = parserConfig.isIdentifierChar || /[\w\$_\xa1-\uffff]/;
 
 	  var curPunc, isDefKeyword;
 
 	  function tokenBase(stream, state) {
 	    var ch = stream.next();
 	    if (hooks[ch]) {
 	      var result = hooks[ch](stream, state);
 	      if (result !== false) return result;
@@ -13119,27 +13917,27 @@ var CodeMirror =
 	        stream.skipToEnd();
 	        return "comment";
 	      }
 	    }
 	    if (isOperatorChar.test(ch)) {
 	      while (!stream.match(/^\/[\/*]/, false) && stream.eat(isOperatorChar)) {}
 	      return "operator";
 	    }
-	    stream.eatWhile(/[\w\$_\xa1-\uffff]/);
+	    stream.eatWhile(isIdentifierChar);
 	    if (namespaceSeparator) while (stream.match(namespaceSeparator))
-	      stream.eatWhile(/[\w\$_\xa1-\uffff]/);
+	      stream.eatWhile(isIdentifierChar);
 
 	    var cur = stream.current();
 	    if (contains(keywords, cur)) {
 	      if (contains(blockKeywords, cur)) curPunc = "newstatement";
 	      if (contains(defKeywords, cur)) isDefKeyword = true;
 	      return "keyword";
 	    }
-	    if (contains(types, cur)) return "variable-3";
+	    if (contains(types, cur)) return "type";
 	    if (contains(builtin, cur)) {
 	      if (contains(blockKeywords, cur)) curPunc = "newstatement";
 	      return "builtin";
 	    }
 	    if (contains(atoms, cur)) return "atom";
 	    return "variable";
 	  }
 
@@ -13194,17 +13992,18 @@ var CodeMirror =
 	        state.startOfLine = true;
 	      }
 	      if (stream.eatSpace()) { maybeEOL(stream, state); return null; }
 	      curPunc = isDefKeyword = null;
 	      var style = (state.tokenize || tokenBase)(stream, state);
 	      if (style == "comment" || style == "meta") return style;
 	      if (ctx.align == null) ctx.align = true;
 
-	      if (endStatement.test(curPunc)) while (state.context.type == "statement") popContext(state);
+	      if (curPunc == ";" || curPunc == ":" || (curPunc == "," && stream.match(/^\s*(?:\/\/.*)?$/, false)))
+	        while (state.context.type == "statement") popContext(state);
 	      else if (curPunc == "{") pushContext(state, stream.column(), "}");
 	      else if (curPunc == "[") pushContext(state, stream.column(), "]");
 	      else if (curPunc == "(") pushContext(state, stream.column(), ")");
 	      else if (curPunc == "}") {
 	        while (ctx.type == "statement") ctx = popContext(state);
 	        if (ctx.type == "}") ctx = popContext(state);
 	        while (ctx.type == "statement") ctx = popContext(state);
 	      }
@@ -13297,17 +14096,17 @@ var CodeMirror =
 	      }
 	      stream.next()
 	    }
 	    state.tokenize = next
 	    return "meta"
 	  }
 
 	  function pointerHook(_stream, state) {
-	    if (state.prevToken == "variable-3") return "variable-3";
+	    if (state.prevToken == "type") return "type";
 	    return false;
 	  }
 
 	  function cpp14Literal(stream) {
 	    stream.eatWhile(/[\w\.']/);
 	    return "number";
 	  }
 
@@ -13331,17 +14130,17 @@ var CodeMirror =
 	      return false;
 	    }
 	    // Ignore this hook.
 	    stream.next();
 	    return false;
 	  }
 
 	  function cppLooksLikeConstructor(word) {
-	    var lastTwo = /(\w+)::(\w+)$/.exec(word);
+	    var lastTwo = /(\w+)::~?(\w+)$/.exec(word);
 	    return lastTwo && lastTwo[1] == lastTwo[2];
 	  }
 
 	  // C#-style strings where "" escapes a quote.
 	  function tokenAtString(stream, state) {
 	    var next;
 	    while ((next = stream.next()) != null) {
 	      if (next == '"' && !stream.eat('"')) {
@@ -13407,16 +14206,17 @@ var CodeMirror =
 	                    "alignas alignof constexpr decltype nullptr noexcept thread_local final " +
 	                    "static_assert override"),
 	    types: words(cTypes + " bool wchar_t"),
 	    blockKeywords: words("catch class do else finally for if struct switch try while"),
 	    defKeywords: words("class namespace struct enum union"),
 	    typeFirstDefinitions: true,
 	    atoms: words("true false null"),
 	    dontIndentStatements: /^template$/,
+	    isIdentifierChar: /[\w\$_~\xa1-\uffff]/,
 	    hooks: {
 	      "#": cppHook,
 	      "*": pointerHook,
 	      "u": cpp11StringHook,
 	      "U": cpp11StringHook,
 	      "L": cpp11StringHook,
 	      "R": cpp11StringHook,
 	      "0": cpp14Literal,
@@ -13442,27 +14242,29 @@ var CodeMirror =
 	  });
 
 	  def("text/x-java", {
 	    name: "clike",
 	    keywords: words("abstract assert break case catch class const continue default " +
 	                    "do else enum extends final finally float for goto if implements import " +
 	                    "instanceof interface native new package private protected public " +
 	                    "return static strictfp super switch synchronized this throw throws transient " +
-	                    "try volatile while"),
+	                    "try volatile while @interface"),
 	    types: words("byte short int long float double boolean char void Boolean Byte Character Double Float " +
 	                 "Integer Long Number Object Short String StringBuffer StringBuilder Void"),
 	    blockKeywords: words("catch class do else finally for if switch try while"),
-	    defKeywords: words("class interface package enum"),
+	    defKeywords: words("class interface package enum @interface"),
 	    typeFirstDefinitions: true,
 	    atoms: words("true false null"),
-	    endStatement: /^[;:]$/,
 	    number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+\.?\d*|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
 	    hooks: {
 	      "@": function(stream) {
+	        // Don't match the @interface keyword.
+	        if (stream.match('interface', false)) return false;
+
 	        stream.eatWhile(/[\w\$_]/);
 	        return "meta";
 	      }
 	    },
 	    modeProps: {fold: ["brace", "import"]}
 	  });
 
 	  def("text/x-csharp", {
@@ -13508,44 +14310,42 @@ var CodeMirror =
 
 	  def("text/x-scala", {
 	    name: "clike",
 	    keywords: words(
 
 	      /* scala */
 	      "abstract case catch class def do else extends final finally for forSome if " +
 	      "implicit import lazy match new null object override package private protected return " +
-	      "sealed super this throw trait try type val var while with yield _ : = => <- <: " +
-	      "<% >: # @ " +
+	      "sealed super this throw trait try type val var while with yield _ " +
 
 	      /* package scala */
 	      "assert assume require print println printf readLine readBoolean readByte readShort " +
-	      "readChar readInt readLong readFloat readDouble " +
-
-	      ":: #:: "
+	      "readChar readInt readLong readFloat readDouble"
 	    ),
 	    types: words(
 	      "AnyVal App Application Array BufferedIterator BigDecimal BigInt Char Console Either " +
 	      "Enumeration Equiv Error Exception Fractional Function IndexedSeq Int Integral Iterable " +
 	      "Iterator List Map Numeric Nil NotNull Option Ordered Ordering PartialFunction PartialOrdering " +
 	      "Product Proxy Range Responder Seq Serializable Set Specializable Stream StringBuilder " +
 	      "StringContext Symbol Throwable Traversable TraversableOnce Tuple Unit Vector " +
 
 	      /* package java.lang */
 	      "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
 	      "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
 	      "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
 	      "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
 	    ),
 	    multiLineStrings: true,
-	    blockKeywords: words("catch class do else finally for forSome if match switch try while"),
-	    defKeywords: words("class def object package trait type val var"),
+	    blockKeywords: words("catch class enum do else finally for forSome if match switch try while"),
+	    defKeywords: words("class enum def object package trait type val var"),
 	    atoms: words("true false null"),
 	    indentStatements: false,
 	    indentSwitch: false,
+	    isOperatorChar: /[+\-*&%=<>!?|\/#:@]/,
 	    hooks: {
 	      "@": function(stream) {
 	        stream.eatWhile(/[\w\$_]/);
 	        return "meta";
 	      },
 	      '"': function(stream, state) {
 	        if (!stream.match('""')) return false;
 	        state.tokenize = tokenTripleString;
@@ -13592,28 +14392,29 @@ var CodeMirror =
 	      "package as typealias class interface this super val " +
 	      "var fun for is in This throw return " +
 	      "break continue object if else while do try when !in !is as? " +
 
 	      /*soft keywords*/
 	      "file import where by get set abstract enum open inner override private public internal " +
 	      "protected catch finally out final vararg reified dynamic companion constructor init " +
 	      "sealed field property receiver param sparam lateinit data inline noinline tailrec " +
-	      "external annotation crossinline const operator infix"
+	      "external annotation crossinline const operator infix suspend"
 	    ),
 	    types: words(
 	      /* package java.lang */
 	      "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
 	      "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
 	      "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
 	      "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
 	    ),
 	    intendSwitch: false,
 	    indentStatements: false,
 	    multiLineStrings: true,
+	    number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+\.?\d*|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
 	    blockKeywords: words("catch class do else finally for if where try while enum"),
 	    defKeywords: words("class val var object package interface fun"),
 	    atoms: words("true false null this"),
 	    hooks: {
 	      '"': function(stream, state) {
 	        state.tokenize = tokenKotlinString(stream.match('""'));
 	        return state.tokenize(stream, state);
 	      }
@@ -13788,34 +14589,34 @@ var CodeMirror =
 	          stringTokenizer = null;
 	          return state.tokenize(stream, state);
 	        },
 	      "'": function(stream) {
 	        stream.eatWhile(/[\w\$_\xa1-\uffff]/);
 	        return "atom";
 	      },
 	      token: function(_stream, state, style) {
-	          if ((style == "variable" || style == "variable-3") &&
+	          if ((style == "variable" || style == "type") &&
 	              state.prevToken == ".") {
 	            return "variable-2";
 	          }
 	        }
 	    },
 	    modeProps: {
 	        fold: ["brace", "import"],
 	        closeBrackets: {triples: '"'}
 	    }
 	  });
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 16 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;/* This Source Code Form is subject to the terms of the Mozilla Public
 	 * License, v. 2.0. If a copy of the MPL was not distributed with this
 	 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 	// WebAssembly experimental syntax highlight add-on for CodeMirror.
 
 	(function (root, factory) {
@@ -14012,52 +14813,48 @@ var CodeMirror =
 
 	CodeMirror.registerHelper("wordChars", "wasm", isWordChar);
 
 	CodeMirror.defineMIME("text/wasm", "wasm");
 
 	}));
 
 
-/***/ },
+/***/ }),
 /* 17 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
-	// Because sometimes you need to style the cursor's line.
-	//
-	// Adds an option 'styleActiveLine' which, when enabled, gives the
-	// active line's wrapping <div> the CSS class "CodeMirror-activeline",
-	// and gives its background <div> the class "CodeMirror-activeline-background".
-
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
 	    define(["../../lib/codemirror"], mod);
 	  else // Plain browser env
 	    mod(CodeMirror);
 	})(function(CodeMirror) {
 	  "use strict";
 	  var WRAP_CLASS = "CodeMirror-activeline";
 	  var BACK_CLASS = "CodeMirror-activeline-background";
 	  var GUTT_CLASS = "CodeMirror-activeline-gutter";
 
 	  CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
-	    var prev = old && old != CodeMirror.Init;
-	    if (val && !prev) {
+	    var prev = old == CodeMirror.Init ? false : old;
+	    if (val == prev) return
+	    if (prev) {
+	      cm.off("beforeSelectionChange", selectionChange);
+	      clearActiveLines(cm);
+	      delete cm.state.activeLines;
+	    }
+	    if (val) {
 	      cm.state.activeLines = [];
 	      updateActiveLines(cm, cm.listSelections());
 	      cm.on("beforeSelectionChange", selectionChange);
-	    } else if (!val && prev) {
-	      cm.off("beforeSelectionChange", selectionChange);
-	      clearActiveLines(cm);
-	      delete cm.state.activeLines;
 	    }
 	  });
 
 	  function clearActiveLines(cm) {
 	    for (var i = 0; i < cm.state.activeLines.length; i++) {
 	      cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
 	      cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
 	      cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
@@ -14070,17 +14867,19 @@ var CodeMirror =
 	      if (a[i] != b[i]) return false;
 	    return true;
 	  }
 
 	  function updateActiveLines(cm, ranges) {
 	    var active = [];
 	    for (var i = 0; i < ranges.length; i++) {
 	      var range = ranges[i];
-	      if (!range.empty()) continue;
+	      var option = cm.getOption("styleActiveLine");
+	      if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
+	        continue
 	      var line = cm.getLineHandleVisualStart(range.head.line);
 	      if (active[active.length - 1] != line) active.push(line);
 	    }
 	    if (sameArray(cm.state.activeLines, active)) return;
 	    cm.operation(function() {
 	      clearActiveLines(cm);
 	      for (var i = 0; i < active.length; i++) {
 	        cm.addLineClass(active[i], "wrap", WRAP_CLASS);
@@ -14092,19 +14891,19 @@ var CodeMirror =
 	  }
 
 	  function selectionChange(cm, sel) {
 	    updateActiveLines(cm, sel.ranges);
 	  }
 	});
 
 
-/***/ },
+/***/ }),
 /* 18 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -14125,19 +14924,19 @@ var CodeMirror =
 	          return "trailingspace";
 	        },
 	        name: "trailingspace"
 	      });
 	  });
 	});
 
 
-/***/ },
+/***/ }),
 /* 19 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -14228,17 +15027,17 @@ var CodeMirror =
 	      if (sawWord && /[!?.]/.test(next)) return Pos(line, ch + (dir > 0 ? 1 : 0));
 	      if (!sawWord) sawWord = /\w/.test(next);
 	      ch += dir;
 	    }
 	  }
 
 	  function byExpr(cm, pos, dir) {
 	    var wrap;
-	    if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, true))
+	    if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, {strict: true}))
 	        && wrap.match && (wrap.forward ? 1 : -1) == dir)
 	      return dir > 0 ? Pos(wrap.to.line, wrap.to.ch + 1) : wrap.to;
 
 	    for (var first = true;; first = false) {
 	      var token = cm.getTokenAt(pos);
 	      var after = Pos(pos.line, dir < 0 ? token.start : token.end);
 	      if (first && dir > 0 && token.end == pos.ch || !/\w/.test(token.string)) {
 	        var newPos = cm.findPosH(after, dir, "char");
@@ -14402,16 +15201,18 @@ var CodeMirror =
 	    }
 	  }
 
 	  function quit(cm) {
 	    cm.execCommand("clearSearch");
 	    clearMark(cm);
 	  }
 
+	  CodeMirror.emacs = {kill: kill, killRegion: killRegion, repeated: repeated};
+
 	  // Actual keymap
 
 	  var keyMap = CodeMirror.keyMap.emacs = CodeMirror.normalizeKeyMap({
 	    "Ctrl-W": function(cm) {kill(cm, cm.getCursor("start"), cm.getCursor("end"));},
 	    "Ctrl-K": repeated(function(cm) {
 	      var start = cm.getCursor(), end = cm.clipPos(Pos(start.line));
 	      var text = cm.getRange(start, end);
 	      if (!/\S/.test(text)) {
@@ -14500,17 +15301,19 @@ var CodeMirror =
 
 	    "Alt-;": "toggleComment",
 
 	    "Ctrl-/": repeated("undo"), "Shift-Ctrl--": repeated("undo"),
 	    "Ctrl-Z": repeated("undo"), "Cmd-Z": repeated("undo"),
 	    "Shift-Alt-,": "goDocStart", "Shift-Alt-.": "goDocEnd",
 	    "Ctrl-S": "findNext", "Ctrl-R": "findPrev", "Ctrl-G": quit, "Shift-Alt-5": "replace",
 	    "Alt-/": "autocomplete",
-	    "Ctrl-J": "newlineAndIndent", "Enter": false, "Tab": "indentAuto",
+	    "Enter": "newlineAndIndent",
+	    "Ctrl-J": repeated(function(cm) { cm.replaceSelection("\n", "end"); }),
+	    "Tab": "indentAuto",
 
 	    "Alt-G G": function(cm) {
 	      var prefix = getPrefix(cm, true);
 	      if (prefix != null && prefix > 0) return cm.setCursor(prefix - 1);
 
 	      getInput(cm, "Goto line", function(str) {
 	        var num;
 	        if (str && !isNaN(num = Number(str)) && num == (num|0) && num > 0)
@@ -14543,19 +15346,19 @@ var CodeMirror =
 	    keyMap["Ctrl-" + d] = function(cm) { addPrefix(cm, d); };
 	    prefixPreservingKeys["Ctrl-" + d] = true;
 	  }
 	  for (var i = 0; i < 10; ++i) regPrefix(String(i));
 	  regPrefix("-");
 	});
 
 
-/***/ },
+/***/ }),
 /* 20 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	/**
 	 * Supported keybindings:
 	 *   Too many to list. Refer to defaultKeyMap below.
 	 *
@@ -14621,16 +15424,17 @@ var CodeMirror =
 	    { keys: 's', type: 'keyToKey', toKeys: 'c', context: 'visual'},
 	    { keys: 'S', type: 'keyToKey', toKeys: 'cc', context: 'normal' },
 	    { keys: 'S', type: 'keyToKey', toKeys: 'VdO', context: 'visual' },
 	    { keys: '<Home>', type: 'keyToKey', toKeys: '0' },
 	    { keys: '<End>', type: 'keyToKey', toKeys: '$' },
 	    { keys: '<PageUp>', type: 'keyToKey', toKeys: '<C-b>' },
 	    { keys: '<PageDown>', type: 'keyToKey', toKeys: '<C-f>' },
 	    { keys: '<CR>', type: 'keyToKey', toKeys: 'j^', context: 'normal' },
+	    { keys: '<Ins>', type: 'action', action: 'toggleOverwrite', context: 'insert' },
 	    // Motions
 	    { keys: 'H', type: 'motion', motion: 'moveToTopLine', motionArgs: { linewise: true, toJumplist: true }},
 	    { keys: 'M', type: 'motion', motion: 'moveToMiddleLine', motionArgs: { linewise: true, toJumplist: true }},
 	    { keys: 'L', type: 'motion', motion: 'moveToBottomLine', motionArgs: { linewise: true, toJumplist: true }},
 	    { keys: 'h', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: false }},
 	    { keys: 'l', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: true }},
 	    { keys: 'j', type: 'motion', motion: 'moveByLines', motionArgs: { forward: true, linewise: true }},
 	    { keys: 'k', type: 'motion', motion: 'moveByLines', motionArgs: { forward: false, linewise: true }},
@@ -14690,17 +15494,17 @@ var CodeMirror =
 	    { keys: 'gU', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: false}, isEdit: true },
 	    { keys: 'n', type: 'motion', motion: 'findNext', motionArgs: { forward: true, toJumplist: true }},
 	    { keys: 'N', type: 'motion', motion: 'findNext', motionArgs: { forward: false, toJumplist: true }},
 	    // Operator-Motion dual commands
 	    { keys: 'x', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorMotionArgs: { visualLine: false }},
 	    { keys: 'X', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: false }, operatorMotionArgs: { visualLine: true }},
 	    { keys: 'D', type: 'operatorMotion', operator: 'delete', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
 	    { keys: 'D', type: 'operator', operator: 'delete', operatorArgs: { linewise: true }, context: 'visual'},
-	    { keys: 'Y', type: 'operatorMotion', operator: 'yank', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
+	    { keys: 'Y', type: 'operatorMotion', operator: 'yank', motion: 'expandToLine', motionArgs: { linewise: true }, context: 'normal'},
 	    { keys: 'Y', type: 'operator', operator: 'yank', operatorArgs: { linewise: true }, context: 'visual'},
 	    { keys: 'C', type: 'operatorMotion', operator: 'change', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
 	    { keys: 'C', type: 'operator', operator: 'change', operatorArgs: { linewise: true }, context: 'visual'},
 	    { keys: '~', type: 'operatorMotion', operator: 'changeCase', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorArgs: { shouldMoveCursor: true }, context: 'normal'},
 	    { keys: '~', type: 'operator', operator: 'changeCase', context: 'visual'},
 	    { keys: '<C-w>', type: 'operatorMotion', operator: 'delete', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: false }, context: 'insert' },
 	    // Actions
 	    { keys: '<C-i>', type: 'action', action: 'jumpListWalk', actionArgs: { forward: true }},
@@ -14738,16 +15542,18 @@ var CodeMirror =
 	    { keys: 'z.', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'center' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
 	    { keys: 'zt', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }},
 	    { keys: 'z<CR>', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
 	    { keys: 'z-', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }},
 	    { keys: 'zb', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
 	    { keys: '.', type: 'action', action: 'repeatLastEdit' },
 	    { keys: '<C-a>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: true, backtrack: false}},
 	    { keys: '<C-x>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: false, backtrack: false}},
+	    { keys: '<C-t>', type: 'action', action: 'indent', actionArgs: { indentRight: true }, context: 'insert' },
+	    { keys: '<C-d>', type: 'action', action: 'indent', actionArgs: { indentRight: false }, context: 'insert' },
 	    // Text object motions
 	    { keys: 'a<character>', type: 'motion', motion: 'textObjectManipulation' },
 	    { keys: 'i<character>', type: 'motion', motion: 'textObjectManipulation', motionArgs: { textObjectInner: true }},
 	    // Search
 	    { keys: '/', type: 'search', searchArgs: { forward: true, querySrc: 'prompt', toJumplist: true }},
 	    { keys: '?', type: 'search', searchArgs: { forward: false, querySrc: 'prompt', toJumplist: true }},
 	    { keys: '*', type: 'search', searchArgs: { forward: true, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
 	    { keys: '#', type: 'search', searchArgs: { forward: false, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
@@ -14805,17 +15611,17 @@ var CodeMirror =
 	      cm.state.vim = null;
 	    }
 
 	    function detachVimMap(cm, next) {
 	      if (this == CodeMirror.keyMap.vim)
 	        CodeMirror.rmClass(cm.getWrapperElement(), "cm-fat-cursor");
 
 	      if (!next || next.attach != attachVimMap)
-	        leaveVimMode(cm, false);
+	        leaveVimMode(cm);
 	    }
 	    function attachVimMap(cm, prev) {
 	      if (this == CodeMirror.keyMap.vim)
 	        CodeMirror.addClass(cm.getWrapperElement(), "cm-fat-cursor");
 
 	      if (!prev || prev.attach != attachVimMap)
 	        enterVimMode(cm);
 	    }
@@ -14825,29 +15631,30 @@ var CodeMirror =
 	      if (val && cm.getOption("keyMap") != "vim")
 	        cm.setOption("keyMap", "vim");
 	      else if (!val && prev != CodeMirror.Init && /^vim/.test(cm.getOption("keyMap")))
 	        cm.setOption("keyMap", "default");
 	    });
 
 	    function cmKey(key, cm) {
 	      if (!cm) { return undefined; }
+	      if (this[key]) { return this[key]; }
 	      var vimKey = cmKeyToVimKey(key);
 	      if (!vimKey) {
 	        return false;
 	      }
 	      var cmd = CodeMirror.Vim.findKey(cm, vimKey);
 	      if (typeof cmd == 'function') {
 	        CodeMirror.signal(cm, 'vim-keypress', vimKey);
 	      }
 	      return cmd;
 	    }
 
 	    var modifiers = {'Shift': 'S', 'Ctrl': 'C', 'Alt': 'A', 'Cmd': 'D', 'Mod': 'A'};
-	    var specialKeys = {Enter:'CR',Backspace:'BS',Delete:'Del'};
+	    var specialKeys = {Enter:'CR',Backspace:'BS',Delete:'Del',Insert:'Ins'};
 	    function cmKeyToVimKey(key) {
 	      if (key.charAt(0) == '\'') {
 	        // Keypress character binding of format "'a'"
 	        return key.charAt(1);
 	      }
 	      var pieces = key.split(/-(?!$)/);
 	      var lastPiece = pieces[pieces.length - 1];
 	      if (pieces.length == 1 && pieces[0].length == 1) {
@@ -14956,21 +15763,21 @@ var CodeMirror =
 	      }
 	    }
 
 	    function setOption(name, value, cm, cfg) {
 	      var option = options[name];
 	      cfg = cfg || {};
 	      var scope = cfg.scope;
 	      if (!option) {
-	        throw Error('Unknown option: ' + name);
+	        return new Error('Unknown option: ' + name);
 	      }
 	      if (option.type == 'boolean') {
 	        if (value && value !== true) {
-	          throw Error('Invalid argument: ' + name + '=' + value);
+	          return new Error('Invalid argument: ' + name + '=' + value);
 	        } else if (value !== false) {
 	          // Boolean options are set to true if value is not defined.
 	          value = true;
 	        }
 	      }
 	      if (option.callback) {
 	        if (scope !== 'local') {
 	          option.callback(value, undefined);
@@ -14988,17 +15795,17 @@ var CodeMirror =
 	      }
 	    }
 
 	    function getOption(name, cm, cfg) {
 	      var option = options[name];
 	      cfg = cfg || {};
 	      var scope = cfg.scope;
 	      if (!option) {
-	        throw Error('Unknown option: ' + name);
+	        return new Error('Unknown option: ' + name);
 	      }
 	      if (option.callback) {
 	        var local = cm && option.callback(undefined, cm);
 	        if (scope !== 'global' && local !== undefined) {
 	          return local;
 	        }
 	        if (scope !== 'local') {
 	          return option.callback();
@@ -15194,19 +16001,19 @@ var CodeMirror =
 	        // Replace part of the last substituted pattern
 	        lastSubstituteReplacePart: undefined,
 	        jumpList: createCircularJumpList(),
 	        macroModeState: new MacroModeState,
 	        // Recording latest f, t, F or T motion command.
 	        lastCharacterSearch: {increment:0, forward:true, selectedCharacter:''},
 	        registerController: new RegisterController({}),
 	        // search history buffer
-	        searchHistoryController: new HistoryController({}),
+	        searchHistoryController: new HistoryController(),
 	        // ex Command history buffer
-	        exCommandHistoryController : new HistoryController({})
+	        exCommandHistoryController : new HistoryController()
 	      };
 	      for (var optionName in options) {
 	        var option = options[optionName];
 	        option.value = option.defaultValue;
 	      }
 	    }
 
 	    var lastInsertModeKeyTimer;
@@ -15327,18 +16134,22 @@ var CodeMirror =
 	            lastInsertModeKeyTimer = window.setTimeout(
 	              function() { if (vim.insertMode && vim.inputState.keyBuffer) { clearInputState(cm); } },
 	              getOption('insertModeEscKeysTimeout'));
 	            return !keysAreChars;
 	          }
 
 	          if (lastInsertModeKeyTimer) { window.clearTimeout(lastInsertModeKeyTimer); }
 	          if (keysAreChars) {
-	            var here = cm.getCursor();
-	            cm.replaceRange('', offsetCursor(here, 0, -(keys.length - 1)), here, '+input');
+	            var selections = cm.listSelections();
+	            for (var i = 0; i < selections.length; i++) {
+	              var here = selections[i].head;
+	              cm.replaceRange('', offsetCursor(here, 0, -(keys.length - 1)), here, '+input');
+	            }
+	            vimGlobalState.macroModeState.lastInsertModeChanges.changes.pop();
 	          }
 	          clearInputState(cm);
 	          return match.command;
 	        }
 
 	        function handleKeyNonInsertMode() {
 	          if (handleMacroRecording() || handleEsc()) { return true; };
 
@@ -15365,17 +16176,17 @@ var CodeMirror =
 	        if (vim.insertMode) { command = handleKeyInsertMode(); }
 	        else { command = handleKeyNonInsertMode(); }
 	        if (command === false) {
 	          return undefined;
 	        } else if (command === true) {
 	          // TODO: Look into using CodeMirror's multi-key handling.
 	          // Return no-op since we are caching the key. Counts as handled, but
 	          // don't want act on it just yet.
-	          return function() {};
+	          return function() { return true; };
 	        } else {
 	          return function() {
 	            return cm.operation(function() {
 	              cm.curOp.isVimOp = true;
 	              try {
 	                if (command.type == 'keyToKey') {
 	                  doKeyToKey(command.toKeys);
 	                } else {
@@ -15499,17 +16310,17 @@ var CodeMirror =
 	    /**
 	     * Defines an external register.
 	     *
 	     * The name should be a single character that will be used to reference the register.
 	     * The register should support setText, pushText, clear, and toString(). See Register
 	     * for a reference implementation.
 	     */
 	    function defineRegister(name, register) {
-	      var registers = vimGlobalState.registerController.registers[name];
+	      var registers = vimGlobalState.registerController.registers;
 	      if (!name || name.length != 1) {
 	        throw Error('Register name must be 1 character');
 	      }
 	      if (registers[name]) {
 	        throw Error('Register already defined ' + name);
 	      }
 	      registers[name] = register;
 	      validRegisters.push(name);
@@ -15527,19 +16338,16 @@ var CodeMirror =
 	      this.registers = registers;
 	      this.unnamedRegister = registers['"'] = new Register();
 	      registers['.'] = new Register();
 	      registers[':'] = new Register();
 	      registers['/'] = new Register();
 	    }
 	    RegisterController.prototype = {
 	      pushText: function(registerName, operator, text, linewise, blockwise) {
-	        if (linewise && text.charAt(0) == '\n') {
-	          text = text.slice(1) + '\n';
-	        }
 	        if (linewise && text.charAt(text.length - 1) !== '\n'){
 	          text += '\n';
 	        }
 	        // Lowercase and uppercase registers refer to the same register.
 	        // Uppercase just means append.
 	        var register = this.isValidRegister(registerName) ?
 	            this.getRegister(registerName) : null;
 	        // if no register/an invalid register was specified, things go to the
@@ -15651,17 +16459,19 @@ var CodeMirror =
 	        var bestMatch;
 	        for (var i = 0; i < matches.full.length; i++) {
 	          var match = matches.full[i];
 	          if (!bestMatch) {
 	            bestMatch = match;
 	          }
 	        }
 	        if (bestMatch.keys.slice(-11) == '<character>') {
-	          inputState.selectedCharacter = lastChar(keys);
+	          var character = lastChar(keys);
+	          if (!character) return {type: 'none'};
+	          inputState.selectedCharacter = character;
 	        }
 	        return {type: 'full', command: bestMatch};
 	      },
 	      processCommand: function(cm, vim, command) {
 	        vim.inputState.repeatOverride = command.repeatOverride;
 	        switch (command.type) {
 	          case 'motion':
 	            this.processMotion(cm, vim, command);
@@ -15786,21 +16596,23 @@ var CodeMirror =
 	          cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
 	          handleQuery(query, true /** ignoreCase */, true /** smartCase */);
 	          var macroModeState = vimGlobalState.macroModeState;
 	          if (macroModeState.isRecording) {
 	            logSearchQuery(macroModeState, query);
 	          }
 	        }
 	        function onPromptKeyUp(e, query, close) {
-	          var keyName = CodeMirror.keyName(e), up;
+	          var keyName = CodeMirror.keyName(e), up, offset;
 	          if (keyName == 'Up' || keyName == 'Down') {
 	            up = keyName == 'Up' ? true : false;
+	            offset = e.target ? e.target.selectionEnd : 0;
 	            query = vimGlobalState.searchHistoryController.nextMatch(query, up) || '';
 	            close(query);
+	            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
 	          } else {
 	            if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
 	              vimGlobalState.searchHistoryController.reset();
 	          }
 	          var parsedQuery;
 	          try {
 	            parsedQuery = updateSearchQuery(cm, query,
 	                true /** ignoreCase */, true /** smartCase */);
@@ -15822,16 +16634,18 @@ var CodeMirror =
 	            vimGlobalState.searchHistoryController.reset();
 	            updateSearchQuery(cm, originalQuery);
 	            clearSearchHighlight(cm);
 	            cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
 	            CodeMirror.e_stop(e);
 	            clearInputState(cm);
 	            close();
 	            cm.focus();
+	          } else if (keyName == 'Up' || keyName == 'Down') {
+	            CodeMirror.e_stop(e);
 	          } else if (keyName == 'Ctrl-U') {
 	            // Ctrl-U clears input.
 	            CodeMirror.e_stop(e);
 	            close('');
 	          }
 	        }
 	        switch (command.searchArgs.querySrc) {
 	          case 'prompt':
@@ -15885,30 +16699,33 @@ var CodeMirror =
 	        function onPromptClose(input) {
 	          // Give the prompt some time to close so that if processCommand shows
 	          // an error, the elements don't overlap.
 	          vimGlobalState.exCommandHistoryController.pushInput(input);
 	          vimGlobalState.exCommandHistoryController.reset();
 	          exCommandDispatcher.processCommand(cm, input);
 	        }
 	        function onPromptKeyDown(e, input, close) {
-	          var keyName = CodeMirror.keyName(e), up;
+	          var keyName = CodeMirror.keyName(e), up, offset;
 	          if (keyName == 'Esc' || keyName == 'Ctrl-C' || keyName == 'Ctrl-[' ||
 	              (keyName == 'Backspace' && input == '')) {
 	            vimGlobalState.exCommandHistoryController.pushInput(input);
 	            vimGlobalState.exCommandHistoryController.reset();
 	            CodeMirror.e_stop(e);
 	            clearInputState(cm);
 	            close();
 	            cm.focus();
 	          }
 	          if (keyName == 'Up' || keyName == 'Down') {
+	            CodeMirror.e_stop(e);
 	            up = keyName == 'Up' ? true : false;
+	            offset = e.target ? e.target.selectionEnd : 0;
 	            input = vimGlobalState.exCommandHistoryController.nextMatch(input, up) || '';
 	            close(input);
+	            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
 	          } else if (keyName == 'Ctrl-U') {
 	            // Ctrl-U clears input.
 	            CodeMirror.e_stop(e);
 	            close('');
 	          } else {
 	            if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
 	              vimGlobalState.exCommandHistoryController.reset();
 	          }
@@ -16161,19 +16978,18 @@ var CodeMirror =
 	        }
 	        var prev = !motionArgs.forward;
 	        // If search is initiated with ? instead of /, negate direction.
 	        prev = (state.isReversed()) ? !prev : prev;
 	        highlightSearchMatches(cm, query);
 	        return findNext(cm, prev/** prev */, query, motionArgs.repeat);
 	      },
 	      goToMark: function(cm, _head, motionArgs, vim) {
-	        var mark = vim.marks[motionArgs.selectedCharacter];
-	        if (mark) {
-	          var pos = mark.find();
+	        var pos = getMarkPos(cm, vim, motionArgs.selectedCharacter);
+	        if (pos) {
 	          return motionArgs.linewise ? { line: pos.line, ch: findFirstNonWhiteSpaceCharacter(cm.getLine(pos.line)) } : pos;
 	        }
 	        return null;
 	      },
 	      moveToOtherHighlightedEnd: function(cm, _head, motionArgs, vim) {
 	        if (vim.visualBlock && motionArgs.sameLine) {
 	          var sel = vim.sel;
 	          return [
@@ -16371,26 +17187,26 @@ var CodeMirror =
 	                   findFirstNonWhiteSpaceCharacter(cm.getLine(cursor.line)));
 	      },
 	      moveToMatchedSymbol: function(cm, head) {
 	        var cursor = head;
 	        var line = cursor.line;
 	        var ch = cursor.ch;
 	        var lineText = cm.getLine(line);
 	        var symbol;
-	        do {
-	          symbol = lineText.charAt(ch++);
+	        for (; ch < lineText.length; ch++) {
+	          symbol = lineText.charAt(ch);
 	          if (symbol && isMatchableSymbol(symbol)) {
-	            var style = cm.getTokenTypeAt(Pos(line, ch));
+	            var style = cm.getTokenTypeAt(Pos(line, ch + 1));
 	            if (style !== "string" && style !== "comment") {
 	              break;
 	            }
 	          }
-	        } while (symbol);
-	        if (symbol) {
+	        }
+	        if (ch < lineText.length) {
 	          var matched = cm.findMatchingBracket(Pos(line, ch));
 	          return matched.to;
 	        } else {
 	          return cursor;
 	        }
 	      },
 	      moveToStartOfLine: function(_cm, head) {
 	        return Pos(head.line, 0);
@@ -16721,17 +17537,30 @@ var CodeMirror =
 	        }
 	        while(repeat--){
 	          executeMacroRegister(cm, vim, macroModeState, registerName);
 	        }
 	      },
 	      enterMacroRecordMode: function(cm, actionArgs) {
 	        var macroModeState = vimGlobalState.macroModeState;
 	        var registerName = actionArgs.selectedCharacter;
-	        macroModeState.enterMacroRecordMode(cm, registerName);
+	        if (vimGlobalState.registerController.isValidRegister(registerName)) {
+	          macroModeState.enterMacroRecordMode(cm, registerName);
+	        }
+	      },
+	      toggleOverwrite: function(cm) {
+	        if (!cm.state.overwrite) {
+	          cm.toggleOverwrite(true);
+	          cm.setOption('keyMap', 'vim-replace');
+	          CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
+	        } else {
+	          cm.toggleOverwrite(false);
+	          cm.setOption('keyMap', 'vim-insert');
+	          CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
+	        }
 	      },
 	      enterInsertMode: function(cm, actionArgs, vim) {
 	        if (cm.getOption('readOnly')) { return; }
 	        vim.insertMode = true;
 	        vim.insertModeRepeat = actionArgs && actionArgs.repeat || 1;
 	        var insertAt = (actionArgs) ? actionArgs.insertAt : null;
 	        var sel = vim.sel;
 	        var head = actionArgs.head || cm.getCursor('head');
@@ -16768,24 +17597,24 @@ var CodeMirror =
 	                Math.max(sel.head.ch + 1, sel.anchor.ch));
 	            height = Math.abs(sel.head.line - sel.anchor.line) + 1;
 	          }
 	        } else if (insertAt == 'inplace') {
 	          if (vim.visualMode){
 	            return;
 	          }
 	        }
-	        cm.setOption('keyMap', 'vim-insert');
 	        cm.setOption('disableInput', false);
 	        if (actionArgs && actionArgs.replace) {
 	          // Handle Replace-mode as a special case of insert mode.
 	          cm.toggleOverwrite(true);
 	          cm.setOption('keyMap', 'vim-replace');
 	          CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
 	        } else {
+	          cm.toggleOverwrite(false);
 	          cm.setOption('keyMap', 'vim-insert');
 	          CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
 	        }
 	        if (!vimGlobalState.macroModeState.isPlaying) {
 	          // Only record if not replaying.
 	          cm.on('change', onChange);
 	          CodeMirror.on(cm.getInputField(), 'keydown', onKeyEventTargetKeyDown);
 	        }
@@ -17148,16 +17977,19 @@ var CodeMirror =
 	        var repeat = actionArgs.repeat;
 	        if (repeat && actionArgs.repeatIsExplicit) {
 	          vim.lastEditInputState.repeatOverride = repeat;
 	        } else {
 	          repeat = vim.lastEditInputState.repeatOverride || repeat;
 	        }
 	        repeatLastEdit(cm, vim, repeat, false /** repeatForInsert */);
 	      },
+	      indent: function(cm, actionArgs) {
+	        cm.indentLine(cm.getCursor().line, actionArgs.indentRight);
+	      },
 	      exitInsertMode: exitInsertMode
 	    };
 
 	    function defineAction(name, fn) {
 	      actions[name] = fn;
 	    }
 
 	    /*
@@ -17225,27 +18057,28 @@ var CodeMirror =
 	        return pressedPrefix == mappedPrefix && pressed.length > prefixLen ? 'full' :
 	               mappedPrefix.indexOf(pressedPrefix) == 0 ? 'partial' : false;
 	      } else {
 	        return pressed == mapped ? 'full' :
 	               mapped.indexOf(pressed) == 0 ? 'partial' : false;
 	      }
 	    }
 	    function lastChar(keys) {
-	      var match = /^.*(<[\w\-]+>)$/.exec(keys);
+	      var match = /^.*(<[^>]+>)$/.exec(keys);
 	      var selectedCharacter = match ? match[1] : keys.slice(-1);
 	      if (selectedCharacter.length > 1){
 	        switch(selectedCharacter){
 	          case '<CR>':
 	            selectedCharacter='\n';
 	            break;
 	          case '<Space>':
 	            selectedCharacter=' ';
 	            break;
 	          default:
+	            selectedCharacter='';
 	            break;
 	        }
 	      }
 	      return selectedCharacter;
 	    }
 	    function repeatFn(cm, fn, repeat) {
 	      return function() {
 	        for (var i = 0; i < repeat; i++) {
@@ -17336,17 +18169,16 @@ var CodeMirror =
 	      } else if (dir < 0 && newDir == -1) {
 	        baseCh--;
 	        headCh++;
 	      }
 	      for (var line = firstLine; line <= lastLine; line++) {
 	        var range = {anchor: new Pos(line, baseCh), head: new Pos(line, headCh)};
 	        selections.push(range);
 	      }
-	      primIndex = head.line == lastLine ? selections.length - 1 : 0;
 	      cm.setSelections(selections);
 	      selectionEnd.ch = headCh;
 	      base.ch = baseCh;
 	      return base;
 	    }
 	    function selectForInsert(cm, head, height) {
 	      var sel = [];
 	      for (var i = 0; i < height; i++) {
@@ -18493,16 +19325,27 @@ var CodeMirror =
 	      var occludeToleranceTop = 6;
 	      var occludeToleranceBottom = 10;
 	      var from = cm.coordsChar({left:0, top: occludeToleranceTop + scrollInfo.top}, 'local');
 	      var bottomY = scrollInfo.clientHeight - occludeToleranceBottom + scrollInfo.top;
 	      var to = cm.coordsChar({left:0, top: bottomY}, 'local');
 	      return {top: from.line, bottom: to.line};
 	    }
 
+	    function getMarkPos(cm, vim, markName) {
+	      if (markName == '\'') {
+	        var history = cm.doc.history.done;
+	        var event = history[history.length - 2];
+	        return event && event.ranges && event.ranges[0].head;
+	      }
+
+	      var mark = vim.marks[markName];
+	      return mark && mark.find();
+	    }
+
 	    var ExCommandDispatcher = function() {
 	      this.buildCommandMap_();
 	    };
 	    ExCommandDispatcher.prototype = {
 	      processCommand: function(cm, input, opt_params) {
 	        var that = this;
 	        cm.operation(function () {
 	          cm.curOp.isVimOp = true;
@@ -18593,34 +19436,52 @@ var CodeMirror =
 	          result.commandName = inputStream.match(/.*/)[0];
 	        }
 
 	        return result;
 	      },
 	      parseLineSpec_: function(cm, inputStream) {
 	        var numberMatch = inputStream.match(/^(\d+)/);
 	        if (numberMatch) {
+	          // Absolute line number plus offset (N+M or N-M) is probably a typo,
+	          // not something the user actually wanted. (NB: vim does allow this.)
 	          return parseInt(numberMatch[1], 10) - 1;
 	        }
 	        switch (inputStream.next()) {
 	          case '.':
-	            return cm.getCursor().line;
+	            return this.parseLineSpecOffset_(inputStream, cm.getCursor().line);
 	          case '$':
-	            return cm.lastLine();
+	            return this.parseLineSpecOffset_(inputStream, cm.lastLine());
 	          case '\'':
-	            var mark = cm.state.vim.marks[inputStream.next()];
-	            if (mark && mark.find()) {
-	              return mark.find().line;
-	            }
-	            throw new Error('Mark not set');
+	            var markName = inputStream.next();
+	            var markPos = getMarkPos(cm, cm.state.vim, markName);
+	            if (!markPos) throw new Error('Mark not set');
+	            return this.parseLineSpecOffset_(inputStream, markPos.line);
+	          case '-':
+	          case '+':
+	            inputStream.backUp(1);
+	            // Offset is relative to current line if not otherwise specified.
+	            return this.parseLineSpecOffset_(inputStream, cm.getCursor().line);
 	          default:
 	            inputStream.backUp(1);
 	            return undefined;
 	        }
 	      },
+	      parseLineSpecOffset_: function(inputStream, line) {
+	        var offsetMatch = inputStream.match(/^([+-])?(\d+)/);
+	        if (offsetMatch) {
+	          var offset = parseInt(offsetMatch[2], 10);
+	          if (offsetMatch[1] == "-") {
+	            line -= offset;
+	          } else {
+	            line += offset;
+	          }
+	        }
+	        return line;
+	      },
 	      parseCommandArgs_: function(inputStream, params, command) {
 	        if (inputStream.eol()) {
 	          return;
 	        }
 	        params.argString = inputStream.match(/.*/)[0];
 	        // Parse command-line arguments
 	        var delim = command.argDelimiter || /\s+/;
 	        var args = trim(params.argString).split(delim);
@@ -18674,27 +19535,26 @@ var CodeMirror =
 	            };
 	          }
 	        } else {
 	          if (rhs != ':' && rhs.charAt(0) == ':') {
 	            // Key to Ex mapping.
 	            var mapping = {
 	              keys: lhs,
 	              type: 'keyToEx',
-	              exArgs: { input: rhs.substring(1) },
-	              user: true};
+	              exArgs: { input: rhs.substring(1) }
+	            };
 	            if (ctx) { mapping.context = ctx; }
 	            defaultKeymap.unshift(mapping);
 	          } else {
 	            // Key to key mapping
 	            var mapping = {
 	              keys: lhs,
 	              type: 'keyToKey',
-	              toKeys: rhs,
-	              user: true
+	              toKeys: rhs
 	            };
 	            if (ctx) { mapping.context = ctx; }
 	            defaultKeymap.unshift(mapping);
 	          }
 	        }
 	      },
 	      unmap: function(lhs, ctx) {
 	        if (lhs != ':' && lhs.charAt(0) == ':') {
@@ -18705,18 +19565,17 @@ var CodeMirror =
 	            delete this.commandMap_[commandName];
 	            return;
 	          }
 	        } else {
 	          // Key to Ex or key to key mapping
 	          var keys = lhs;
 	          for (var i = 0; i < defaultKeymap.length; i++) {
 	            if (keys == defaultKeymap[i].keys
-	                && defaultKeymap[i].context === ctx
-	                && defaultKeymap[i].user) {
+	                && defaultKeymap[i].context === ctx) {
 	              defaultKeymap.splice(i, 1);
 	              return;
 	            }
 	          }
 	        }
 	        throw Error('No such mapping.');
 	      }
 	    };
@@ -18792,23 +19651,28 @@ var CodeMirror =
 	        var optionIsBoolean = options[optionName] && options[optionName].type == 'boolean';
 	        if (optionIsBoolean && value == undefined) {
 	          // Calling set with a boolean option sets it to true.
 	          value = true;
 	        }
 	        // If no value is provided, then we assume this is a get.
 	        if (!optionIsBoolean && value === undefined || forceGet) {
 	          var oldValue = getOption(optionName, cm, setCfg);
-	          if (oldValue === true || oldValue === false) {
+	          if (oldValue instanceof Error) {
+	            showConfirm(cm, oldValue.message);
+	          } else if (oldValue === true || oldValue === false) {
 	            showConfirm(cm, ' ' + (oldValue ? '' : 'no') + optionName);
 	          } else {
 	            showConfirm(cm, '  ' + optionName + '=' + oldValue);
 	          }
 	        } else {
-	          setOption(optionName, value, cm, setCfg);
+	          var setOptionReturn = setOption(optionName, value, cm, setCfg);
+	          if (setOptionReturn instanceof Error) {
+	            showConfirm(cm, setOptionReturn.message);
+	          }
 	        }
 	      },
 	      setlocal: function (cm, params) {
 	        // setCfg is passed through to setOption
 	        params.setCfg = {scope: 'local'};
 	        this.set(cm, params);
 	      },
 	      setglobal: function (cm, params) {
@@ -18837,56 +19701,62 @@ var CodeMirror =
 	            }
 	            var register = registers[registerName] || new Register();
 	            regInfo += '"' + registerName + '    ' + register.toString() + '<br>';
 	          }
 	        }
 	        showConfirm(cm, regInfo);
 	      },
 	      sort: function(cm, params) {
-	        var reverse, ignoreCase, unique, number;
+	        var reverse, ignoreCase, unique, number, pattern;
 	        function parseArgs() {
 	          if (params.argString) {
 	            var args = new CodeMirror.StringStream(params.argString);
 	            if (args.eat('!')) { reverse = true; }
 	            if (args.eol()) { return; }
 	            if (!args.eatSpace()) { return 'Invalid arguments'; }
-	            var opts = args.match(/[a-z]+/);
-	            if (opts) {
-	              opts = opts[0];
-	              ignoreCase = opts.indexOf('i') != -1;
-	              unique = opts.indexOf('u') != -1;
-	              var decimal = opts.indexOf('d') != -1 && 1;
-	              var hex = opts.indexOf('x') != -1 && 1;
-	              var octal = opts.indexOf('o') != -1 && 1;
+	            var opts = args.match(/([dinuox]+)?\s*(\/.+\/)?\s*/);
+	            if (!opts && !args.eol()) { return 'Invalid arguments'; }
+	            if (opts[1]) {
+	              ignoreCase = opts[1].indexOf('i') != -1;
+	              unique = opts[1].indexOf('u') != -1;
+	              var decimal = opts[1].indexOf('d') != -1 || opts[1].indexOf('n') != -1 && 1;
+	              var hex = opts[1].indexOf('x') != -1 && 1;
+	              var octal = opts[1].indexOf('o') != -1 && 1;
 	              if (decimal + hex + octal > 1) { return 'Invalid arguments'; }
 	              number = decimal && 'decimal' || hex && 'hex' || octal && 'octal';
 	            }
-	            if (args.match(/\/.*\//)) { return 'patterns not supported'; }
+	            if (opts[2]) {
+	              pattern = new RegExp(opts[2].substr(1, opts[2].length - 2), ignoreCase ? 'i' : '');
+	            }
 	          }
 	        }
 	        var err = parseArgs();
 	        if (err) {
 	          showConfirm(cm, err + ': ' + params.argString);
 	          return;
 	        }
 	        var lineStart = params.line || cm.firstLine();
 	        var lineEnd = params.lineEnd || params.line || cm.lastLine();
 	        if (lineStart == lineEnd) { return; }
 	        var curStart = Pos(lineStart, 0);
 	        var curEnd = Pos(lineEnd, lineLength(cm, lineEnd));
 	        var text = cm.getRange(curStart, curEnd).split('\n');
-	        var numberRegex = (number == 'decimal') ? /(-?)([\d]+)/ :
+	        var numberRegex = pattern ? pattern :
+	           (number == 'decimal') ? /(-?)([\d]+)/ :
 	           (number == 'hex') ? /(-?)(?:0x)?([0-9a-f]+)/i :
 	           (number == 'octal') ? /([0-7]+)/ : null;
 	        var radix = (number == 'decimal') ? 10 : (number == 'hex') ? 16 : (number == 'octal') ? 8 : null;
 	        var numPart = [], textPart = [];
-	        if (number) {
+	        if (number || pattern) {
 	          for (var i = 0; i < text.length; i++) {
-	            if (numberRegex.exec(text[i])) {
+	            var matchPart = pattern ? text[i].match(pattern) : null;
+	            if (matchPart && matchPart[0] != '') {
+	              numPart.push(matchPart);
+	            } else if (!pattern && numberRegex.exec(text[i])) {
 	              numPart.push(text[i]);
 	            } else {
 	              textPart.push(text[i]);
 	            }
 	          }
 	        } else {
 	          textPart = text;
 	        }
@@ -18895,18 +19765,27 @@ var CodeMirror =
 	          if (ignoreCase) { a = a.toLowerCase(); b = b.toLowerCase(); }
 	          var anum = number && numberRegex.exec(a);
 	          var bnum = number && numberRegex.exec(b);
 	          if (!anum) { return a < b ? -1 : 1; }
 	          anum = parseInt((anum[1] + anum[2]).toLowerCase(), radix);
 	          bnum = parseInt((bnum[1] + bnum[2]).toLowerCase(), radix);
 	          return anum - bnum;
 	        }
-	        numPart.sort(compareFn);
-	        textPart.sort(compareFn);
+	        function comparePatternFn(a, b) {
+	          if (reverse) { var tmp; tmp = a; a = b; b = tmp; }
+	          if (ignoreCase) { a[0] = a[0].toLowerCase(); b[0] = b[0].toLowerCase(); }
+	          return (a[0] < b[0]) ? -1 : 1;
+	        }
+	        numPart.sort(pattern ? comparePatternFn : compareFn);
+	        if (pattern) {
+	          for (var i = 0; i < numPart.length; i++) {
+	            numPart[i] = numPart[i].input;
+	          }
+	        } else if (!number) { textPart.sort(compareFn); }
 	        text = (!reverse) ? textPart.concat(numPart) : numPart.concat(textPart);
 	        if (unique) { // Remove duplicate lines
 	          var textOld = text;
 	          var lastLine;
 	          text = [];
 	          for (var i = 0; i < textOld.length; i++) {
 	            if (textOld[i] != lastLine) {
 	              text.push(textOld[i]);
@@ -18982,16 +19861,20 @@ var CodeMirror =
 	        var argString = params.argString;
 	        var tokens = argString ? splitBySlash(argString) : [];
 	        var regexPart, replacePart = '', trailing, flagsPart, count;
 	        var confirm = false; // Whether to confirm each replace.
 	        var global = false; // True to replace all instances on a line, false to replace only 1.
 	        if (tokens.length) {
 	          regexPart = tokens[0];
 	          replacePart = tokens[1];
+	          if (regexPart && regexPart[regexPart.length - 1] === '$') {
+	            regexPart = regexPart.slice(0, regexPart.length - 1) + '\\n';
+	            replacePart = replacePart ? replacePart + '\n' : '\n';
+	          }
 	          if (replacePart !== undefined) {
 	            if (getOption('pcre')) {
 	              replacePart = unescapeRegexReplace(replacePart);
 	            } else {
 	              replacePart = translateRegexReplace(replacePart);
 	            }
 	            vimGlobalState.lastSubstituteReplacePart = replacePart;
 	          }
@@ -19320,23 +20203,16 @@ var CodeMirror =
 
 	    // The timeout in milliseconds for the two-character ESC keymap should be
 	    // adjusted according to your typing speed to prevent false positives.
 	    defineOption('insertModeEscKeysTimeout', 200, 'number');
 
 	    CodeMirror.keyMap['vim-insert'] = {
 	      // TODO: override navigation keys so that Esc will cancel automatic
 	      // indentation from o, O, i_<CR>
-	      'Ctrl-N': 'autocomplete',
-	      'Ctrl-P': 'autocomplete',
-	      'Enter': function(cm) {
-	        var fn = CodeMirror.commands.newlineAndIndentContinueComment ||
-	            CodeMirror.commands.newlineAndIndent;
-	        fn(cm);
-	      },
 	      fallthrough: ['default'],
 	      attach: attachVimMap,
 	      detach: detachVimMap,
 	      call: cmKey
 	    };
 
 	    CodeMirror.keyMap['vim-replace'] = {
 	      'Backspace': 'goCharLeft',
@@ -19408,26 +20284,34 @@ var CodeMirror =
 	        register.pushSearchQuery(query);
 	      }
 	    }
 
 	    /**
 	     * Listens for changes made in insert mode.
 	     * Should only be active in insert mode.
 	     */
-	    function onChange(_cm, changeObj) {
+	    function onChange(cm, changeObj) {
 	      var macroModeState = vimGlobalState.macroModeState;
 	      var lastChange = macroModeState.lastInsertModeChanges;
 	      if (!macroModeState.isPlaying) {
 	        while(changeObj) {
 	          lastChange.expectCursorActivityForChange = true;
 	          if (changeObj.origin == '+input' || changeObj.origin == 'paste'
 	              || changeObj.origin === undefined /* only in testing */) {
 	            var text = changeObj.text.join('\n');
-	            lastChange.changes.push(text);
+	            if (lastChange.maybeReset) {
+	              lastChange.changes = [];
+	              lastChange.maybeReset = false;
+	            }
+	            if (cm.state.overwrite && !/\n/.test(text)) {
+	                lastChange.changes.push([text]);
+	            } else {
+	                lastChange.changes.push(text);
+	            }
 	          }
 	          // Change objects may be chained with next.
 	          changeObj = changeObj.next;
 	        }
 	      }
 	    }
 
 	    /**
@@ -19439,17 +20323,17 @@ var CodeMirror =
 	        // Tracking cursor activity in insert mode (for macro support).
 	        var macroModeState = vimGlobalState.macroModeState;
 	        if (macroModeState.isPlaying) { return; }
 	        var lastChange = macroModeState.lastInsertModeChanges;
 	        if (lastChange.expectCursorActivityForChange) {
 	          lastChange.expectCursorActivityForChange = false;
 	        } else {
 	          // Cursor moved outside the context of an edit. Reset the change.
-	          lastChange.changes = [];
+	          lastChange.maybeReset = true;
 	        }
 	      } else if (!cm.curOp.isVimOp) {
 	        handleExternalSelection(cm, vim);
 	      }
 	      if (vim.visualMode) {
 	        updateFakeCursor(cm);
 	      }
 	    }
@@ -19503,16 +20387,20 @@ var CodeMirror =
 	    * - For recording deletes in insert mode.
 	    */
 	    function onKeyEventTargetKeyDown(e) {
 	      var macroModeState = vimGlobalState.macroModeState;
 	      var lastChange = macroModeState.lastInsertModeChanges;
 	      var keyName = CodeMirror.keyName(e);
 	      if (!keyName) { return; }
 	      function onKeyFound() {
+	        if (lastChange.maybeReset) {
+	          lastChange.changes = [];
+	          lastChange.maybeReset = false;
+	        }
 	        lastChange.changes.push(new InsertModeKey(keyName));
 	        return true;
 	      }
 	      if (keyName.indexOf('Delete') != -1 || keyName.indexOf('Backspace') != -1) {
 	        CodeMirror.lookupKey(keyName, 'vim-insert', onKeyFound);
 	      }
 	    }
 
@@ -19595,38 +20483,42 @@ var CodeMirror =
 	      for (var i = 0; i < repeat; i++) {
 	        if (inVisualBlock) {
 	          cm.setCursor(offsetCursor(head, i, 0));
 	        }
 	        for (var j = 0; j < changes.length; j++) {
 	          var change = changes[j];
 	          if (change instanceof InsertModeKey) {
 	            CodeMirror.lookupKey(change.keyName, 'vim-insert', keyHandler);
-	          } else {
+	          } else if (typeof change == "string") {
 	            var cur = cm.getCursor();
 	            cm.replaceRange(change, cur, cur);
+	          } else {
+	            var start = cm.getCursor();
+	            var end = offsetCursor(start, 0, change[0].length);
+	            cm.replaceRange(change[0], start, end);
 	          }
 	        }
 	      }
 	      if (inVisualBlock) {
 	        cm.setCursor(offsetCursor(head, 0, 1));
 	      }
 	    }
 
 	    resetVimGlobalState();
 	    return vimApi;
 	  };
 	  // Initialize Vim and make it available as an API.
 	  CodeMirror.Vim = Vim();
 	});
 
 
-/***/ },
+/***/ }),
 /* 21 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	// A rough approximation of Sublime Text's keybindings
 	// Depends on addon/search/searchcursor.js and optionally addon/dialog/dialogs.js
 
 	(function(mod) {
@@ -19672,18 +20564,20 @@ var CodeMirror =
 	    cm.extendSelectionsBy(function(range) {
 	      if (cm.display.shift || cm.doc.extend || range.empty())
 	        return findPosSubword(cm.doc, range.head, dir);
 	      else
 	        return dir < 0 ? range.from() : range.to();
 	    });
 	  }
 
-	  cmds[map["Alt-Left"] = "goSubwordLeft"] = function(cm) { moveSubword(cm, -1); };
-	  cmds[map["Alt-Right"] = "goSubwordRight"] = function(cm) { moveSubword(cm, 1); };
+	  var goSubwordCombo = mac ? "Ctrl-" : "Alt-";
+
+	  cmds[map[goSubwordCombo + "Left"] = "goSubwordLeft"] = function(cm) { moveSubword(cm, -1); };
+	  cmds[map[goSubwordCombo + "Right"] = "goSubwordRight"] = function(cm) { moveSubword(cm, 1); };
 
 	  if (mac) map["Cmd-Left"] = "goLineStartSmart";
 
 	  var scrollLineCombo = mac ? "Ctrl-Alt-" : "Ctrl-";
 
 	  cmds[map[scrollLineCombo + "Up"] = "scrollLineUp"] = function(cm) {
 	    var info = cm.getScrollInfo();
 	    if (!cm.somethingSelected()) {
@@ -19770,41 +20664,54 @@ var CodeMirror =
 	      var word = wordAt(cm, from);
 	      if (!word.word) return;
 	      cm.setSelection(word.from, word.to);
 	      fullWord = true;
 	    } else {
 	      var text = cm.getRange(from, to);
 	      var query = fullWord ? new RegExp("\\b" + text + "\\b") : text;
 	      var cur = cm.getSearchCursor(query, to);
-	      if (cur.findNext()) {
-	        cm.addSelection(cur.from(), cur.to());
-	      } else {
+	      var found = cur.findNext();
+	      if (!found) {
 	        cur = cm.getSearchCursor(query, Pos(cm.firstLine(), 0));
-	        if (cur.findNext())
-	          cm.addSelection(cur.from(), cur.to());
-	      }
+	        found = cur.findNext();
+	      }
+	      if (!found || isSelectedRange(cm.listSelections(), cur.from(), cur.to()))
+	        return CodeMirror.Pass
+	      cm.addSelection(cur.from(), cur.to());
 	    }
 	    if (fullWord)
 	      cm.state.sublimeFindFullWord = cm.doc.sel;
 	  };
 
+	  function isSelectedRange(ranges, from, to) {
+	    for (var i = 0; i < ranges.length; i++)
+	      if (ranges[i].from() == from && ranges[i].to() == to) return true
+	    return false
+	  }
+
 	  var mirror = "(){}[]";
 	  function selectBetweenBrackets(cm) {
-	    var pos = cm.getCursor(), opening = cm.scanForBracket(pos, -1);
-	    if (!opening) return;
-	    for (;;) {
-	      var closing = cm.scanForBracket(pos, 1);
-	      if (!closing) return;
-	      if (closing.ch == mirror.charAt(mirror.indexOf(opening.ch) + 1)) {
-	        cm.setSelection(Pos(opening.pos.line, opening.pos.ch + 1), closing.pos, false);
-	        return true;
-	      }
-	      pos = Pos(closing.pos.line, closing.pos.ch + 1);
-	    }
+	    var ranges = cm.listSelections(), newRanges = []
+	    for (var i = 0; i < ranges.length; i++) {
+	      var range = ranges[i], pos = range.head, opening = cm.scanForBracket(pos, -1);
+	      if (!opening) return false;
+	      for (;;) {
+	        var closing = cm.scanForBracket(pos, 1);
+	        if (!closing) return false;
+	        if (closing.ch == mirror.charAt(mirror.indexOf(opening.ch) + 1)) {
+	          newRanges.push({anchor: Pos(opening.pos.line, opening.pos.ch + 1),
+	                          head: closing.pos});
+	          break;
+	        }
+	        pos = Pos(closing.pos.line, closing.pos.ch + 1);
+	      }
+	    }
+	    cm.setSelections(newRanges);
+	    return true;
 	  }
 
 	  cmds[map["Shift-" + ctrl + "Space"] = "selectScope"] = function(cm) {
 	    selectBetweenBrackets(cm) || cm.execCommand("selectAll");
 	  };
 	  cmds[map["Shift-" + ctrl + "M"] = "selectBetweenBrackets"] = function(cm) {
 	    if (!selectBetweenBrackets(cm)) return CodeMirror.Pass;
 	  };
@@ -19912,27 +20819,28 @@ var CodeMirror =
 	          cm.replaceRange(cm.getLine(range.head.line) + "\n", Pos(range.head.line, 0));
 	        else
 	          cm.replaceRange(cm.getRange(range.from(), range.to()), range.from());
 	      }
 	      cm.scrollIntoView();
 	    });
 	  };
 
-	  map[ctrl + "T"] = "transposeChars";
+	  if (!mac) map[ctrl + "T"] = "transposeChars";
 
 	  function sortLines(cm, caseSensitive) {
 	    if (cm.isReadOnly()) return CodeMirror.Pass
 	    var ranges = cm.listSelections(), toSort = [], selected;
 	    for (var i = 0; i < ranges.length; i++) {
 	      var range = ranges[i];
 	      if (range.empty()) continue;
 	      var from = range.from().line, to = range.to().line;
 	      while (i < ranges.length - 1 && ranges[i + 1].from().line == to)
-	        to = range[++i].to().line;
+	        to = ranges[++i].to().line;
+	      if (!ranges[i].to().ch) to--;
 	      toSort.push(from, to);
 	    }
 	    if (toSort.length) selected = true;
 	    else toSort.push(cm.firstLine(), cm.lastLine());
 
 	    cm.operation(function() {
 	      var ranges = [];
 	      for (var i = 0; i < toSort.length; i += 2) {
@@ -19943,17 +20851,17 @@ var CodeMirror =
 	          lines.sort();
 	        else
 	          lines.sort(function(a, b) {
 	            var au = a.toUpperCase(), bu = b.toUpperCase();
 	            if (au != bu) { a = au; b = bu; }
 	            return a < b ? -1 : a == b ? 0 : 1;
 	          });
 	        cm.replaceRange(lines, start, end);
-	        if (selected) ranges.push({anchor: start, head: end});
+	        if (selected) ranges.push({anchor: start, head: Pos(to + 1, 0)});
 	      }
 	      if (selected) cm.setSelections(ranges, 0);
 	    });
 	  }
 
 	  cmds[map["F9"] = "sortLines"] = function(cm) { sortLines(cm, true); };
 	  cmds[map[ctrl + "F9"] = "sortLinesInsensitive"] = function(cm) { sortLines(cm, false); };
 
@@ -20188,31 +21096,31 @@ var CodeMirror =
 	      if (cur.from().line <= target.from.line && cur.from().ch <= target.from.ch)
 	        primaryIndex++;
 	    }
 	    cm.setSelections(matches, primaryIndex);
 	  };
 
 	  map["Shift-" + ctrl + "["] = "fold";
 	  map["Shift-" + ctrl + "]"] = "unfold";
-	  map[cK + ctrl + "0"] = map[cK + ctrl + "j"] = "unfoldAll";
+	  map[cK + ctrl + "0"] = map[cK + ctrl + "J"] = "unfoldAll";
 
 	  map[ctrl + "I"] = "findIncremental";
 	  map["Shift-" + ctrl + "I"] = "findIncrementalReverse";
 	  map[ctrl + "H"] = "replace";
 	  map["F3"] = "findNext";
 	  map["Shift-F3"] = "findPrev";
 
 	  CodeMirror.normalizeKeyMap(map);
 	});
 
 
-/***/ },
+/***/ }),
 /* 22 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -20356,19 +21264,19 @@ var CodeMirror =
 	  }
 
 	  CodeMirror.defineExtension("foldOption", function(options, name) {
 	    return getOption(this, options, name);
 	  });
 	});
 
 
-/***/ },
+/***/ }),
 /* 23 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -20467,19 +21375,19 @@ var CodeMirror =
 	  }
 	  return {from: CodeMirror.Pos(startLine, has + 1),
 	          to: cm.clipPos(CodeMirror.Pos(end))};
 	});
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 24 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -20532,19 +21440,19 @@ var CodeMirror =
 	  if (end == null || line == end && endCh == startCh) return;
 	  return {from: CodeMirror.Pos(line, startCh),
 	          to: CodeMirror.Pos(end, endCh)};
 	});
 
 	});
 
 
-/***/ },
+/***/ }),
 /* 25 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -20559,18 +21467,18 @@ var CodeMirror =
 
 	  var nameStartChar = "A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
 	  var nameChar = nameStartChar + "\-\:\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
 	  var xmlTagStart = new RegExp("<(/?)([" + nameStartChar + "][" + nameChar + "]*)", "g");
 
 	  function Iter(cm, line, ch, range) {
 	    this.line = line; this.ch = ch;
 	    this.cm = cm; this.text = cm.getLine(line);
-	    this.min = range ? range.from : cm.firstLine();
-	    this.max = range ? range.to - 1 : cm.lastLine();
+	    this.min = range ? Math.max(range.from, cm.firstLine()) : cm.firstLine();
+	    this.max = range ? Math.min(range.to - 1, cm.lastLine()) : cm.lastLine();
 	  }
 
 	  function tagAt(iter, ch) {
 	    var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
 	    return type && /\btag\b/.test(type);
 	  }
 
 	  function nextLine(iter) {
@@ -20701,38 +21609,38 @@ var CodeMirror =
 	    if (start[1]) { // closing tag
 	      return {open: findMatchingOpen(iter, start[2]), close: here, at: "close"};
 	    } else { // opening tag
 	      iter = new Iter(cm, to.line, to.ch, range);
 	      return {open: here, close: findMatchingClose(iter, start[2]), at: "open"};
 	    }
 	  };
 
-	  CodeMirror.findEnclosingTag = function(cm, pos, range) {
+	  CodeMirror.findEnclosingTag = function(cm, pos, range, tag) {
 	    var iter = new Iter(cm, pos.line, pos.ch, range);
 	    for (;;) {
-	      var open = findMatchingOpen(iter);
+	      var open = findMatchingOpen(iter, tag);
 	      if (!open) break;
 	      var forward = new Iter(cm, pos.line, pos.ch, range);
 	      var close = findMatchingClose(forward, open.tag);
 	      if (close) return {open: open, close: close};
 	    }
 	  };
 
 	  // Used by addon/edit/closetag.js
 	  CodeMirror.scanForClosingTag = function(cm, pos, name, end) {
 	    var iter = new Iter(cm, pos.line, pos.ch, end ? {from: 0, to: end} : null);
 	    return findMatchingClose(iter, name);
 	  };
 	});
 
 
-/***/ },
+/***/ }),
 /* 26 */
-/***/ function(module, exports, __webpack_require__) {
+/***/ (function(module, exports, __webpack_require__) {
 
 	// CodeMirror, copyright (c) by Marijn Haverbeke and others
 	// Distributed under an MIT license: http://codemirror.net/LICENSE
 
 	(function(mod) {
 	  if (true) // CommonJS
 	    mod(__webpack_require__(2), __webpack_require__(22));
 	  else if (typeof define == "function" && define.amd) // AMD
@@ -20872,10 +21780,10 @@ var CodeMirror =
 	    if (!state) return;
 	    var line = from.line;
 	    if (line >= state.from && line < state.to)
 	      updateFoldInfo(cm, line, line + 1);
 	  }
 	});
 
 
-/***/ }
+/***/ })
 /******/ ]);
\ No newline at end of file
--- a/devtools/client/sourceeditor/codemirror/keymap/emacs.js
+++ b/devtools/client/sourceeditor/codemirror/keymap/emacs.js
@@ -92,17 +92,17 @@
       if (sawWord && /[!?.]/.test(next)) return Pos(line, ch + (dir > 0 ? 1 : 0));
       if (!sawWord) sawWord = /\w/.test(next);
       ch += dir;
     }
   }
 
   function byExpr(cm, pos, dir) {
     var wrap;
-    if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, true))
+    if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, {strict: true}))
         && wrap.match && (wrap.forward ? 1 : -1) == dir)
       return dir > 0 ? Pos(wrap.to.line, wrap.to.ch + 1) : wrap.to;
 
     for (var first = true;; first = false) {
       var token = cm.getTokenAt(pos);
       var after = Pos(pos.line, dir < 0 ? token.start : token.end);
       if (first && dir > 0 && token.end == pos.ch || !/\w/.test(token.string)) {
         var newPos = cm.findPosH(after, dir, "char");
@@ -266,16 +266,18 @@
     }
   }
 
   function quit(cm) {
     cm.execCommand("clearSearch");
     clearMark(cm);
   }
 
+  CodeMirror.emacs = {kill: kill, killRegion: killRegion, repeated: repeated};
+
   // Actual keymap
 
   var keyMap = CodeMirror.keyMap.emacs = CodeMirror.normalizeKeyMap({
     "Ctrl-W": function(cm) {kill(cm, cm.getCursor("start"), cm.getCursor("end"));},
     "Ctrl-K": repeated(function(cm) {
       var start = cm.getCursor(), end = cm.clipPos(Pos(start.line));
       var text = cm.getRange(start, end);
       if (!/\S/.test(text)) {
@@ -364,17 +366,19 @@
 
     "Alt-;": "toggleComment",
 
     "Ctrl-/": repeated("undo"), "Shift-Ctrl--": repeated("undo"),
     "Ctrl-Z": repeated("undo"), "Cmd-Z": repeated("undo"),
     "Shift-Alt-,": "goDocStart", "Shift-Alt-.": "goDocEnd",
     "Ctrl-S": "findNext", "Ctrl-R": "findPrev", "Ctrl-G": quit, "Shift-Alt-5": "replace",
     "Alt-/": "autocomplete",
-    "Ctrl-J": "newlineAndIndent", "Enter": false, "Tab": "indentAuto",
+    "Enter": "newlineAndIndent",
+    "Ctrl-J": repeated(function(cm) { cm.replaceSelection("\n", "end"); }),
+    "Tab": "indentAuto",
 
     "Alt-G G": function(cm) {
       var prefix = getPrefix(cm, true);
       if (prefix != null && prefix > 0) return cm.setCursor(prefix - 1);
 
       getInput(cm, "Goto line", function(str) {
         var num;
         if (str && !isNaN(num = Number(str)) && num == (num|0) && num > 0)
--- a/devtools/client/sourceeditor/codemirror/keymap/sublime.js
+++ b/devtools/client/sourceeditor/codemirror/keymap/sublime.js
@@ -47,18 +47,20 @@
     cm.extendSelectionsBy(function(range) {
       if (cm.display.shift || cm.doc.extend || range.empty())
         return findPosSubword(cm.doc, range.head, dir);
       else
         return dir < 0 ? range.from() : range.to();
     });
   }
 
-  cmds[map["Alt-Left"] = "goSubwordLeft"] = function(cm) { moveSubword(cm, -1); };
-  cmds[map["Alt-Right"] = "goSubwordRight"] = function(cm) { moveSubword(cm, 1); };
+  var goSubwordCombo = mac ? "Ctrl-" : "Alt-";
+
+  cmds[map[goSubwordCombo + "Left"] = "goSubwordLeft"] = function(cm) { moveSubword(cm, -1); };
+  cmds[map[goSubwordCombo + "Right"] = "goSubwordRight"] = function(cm) { moveSubword(cm, 1); };
 
   if (mac) map["Cmd-Left"] = "goLineStartSmart";
 
   var scrollLineCombo = mac ? "Ctrl-Alt-" : "Ctrl-";
 
   cmds[map[scrollLineCombo + "Up"] = "scrollLineUp"] = function(cm) {
     var info = cm.getScrollInfo();
     if (!cm.somethingSelected()) {
@@ -145,41 +147,54 @@
       var word = wordAt(cm, from);
       if (!word.word) return;
       cm.setSelection(word.from, word.to);
       fullWord = true;
     } else {
       var text = cm.getRange(from, to);
       var query = fullWord ? new RegExp("\\b" + text + "\\b") : text;
       var cur = cm.getSearchCursor(query, to);
-      if (cur.findNext()) {
-        cm.addSelection(cur.from(), cur.to());
-      } else {
+      var found = cur.findNext();
+      if (!found) {
         cur = cm.getSearchCursor(query, Pos(cm.firstLine(), 0));
-        if (cur.findNext())
-          cm.addSelection(cur.from(), cur.to());
+        found = cur.findNext();
       }
+      if (!found || isSelectedRange(cm.listSelections(), cur.from(), cur.to()))
+        return CodeMirror.Pass
+      cm.addSelection(cur.from(), cur.to());
     }
     if (fullWord)
       cm.state.sublimeFindFullWord = cm.doc.sel;
   };
 
+  function isSelectedRange(ranges, from, to) {
+    for (var i = 0; i < ranges.length; i++)
+      if (ranges[i].from() == from && ranges[i].to() == to) return true
+    return false
+  }
+
   var mirror = "(){}[]";
   function selectBetweenBrackets(cm) {
-    var pos = cm.getCursor(), opening = cm.scanForBracket(pos, -1);
-    if (!opening) return;
-    for (;;) {
-      var closing = cm.scanForBracket(pos, 1);
-      if (!closing) return;
-      if (closing.ch == mirror.charAt(mirror.indexOf(opening.ch) + 1)) {
-        cm.setSelection(Pos(opening.pos.line, opening.pos.ch + 1), closing.pos, false);
-        return true;
+    var ranges = cm.listSelections(), newRanges = []
+    for (var i = 0; i < ranges.length; i++) {
+      var range = ranges[i], pos = range.head, opening = cm.scanForBracket(pos, -1);
+      if (!opening) return false;
+      for (;;) {
+        var closing = cm.scanForBracket(pos, 1);
+        if (!closing) return false;
+        if (closing.ch == mirror.charAt(mirror.indexOf(opening.ch) + 1)) {
+          newRanges.push({anchor: Pos(opening.pos.line, opening.pos.ch + 1),
+                          head: closing.pos});
+          break;
+        }
+        pos = Pos(closing.pos.line, closing.pos.ch + 1);
       }
-      pos = Pos(closing.pos.line, closing.pos.ch + 1);
     }
+    cm.setSelections(newRanges);
+    return true;
   }
 
   cmds[map["Shift-" + ctrl + "Space"] = "selectScope"] = function(cm) {
     selectBetweenBrackets(cm) || cm.execCommand("selectAll");
   };
   cmds[map["Shift-" + ctrl + "M"] = "selectBetweenBrackets"] = function(cm) {
     if (!selectBetweenBrackets(cm)) return CodeMirror.Pass;
   };
@@ -287,27 +302,28 @@
           cm.replaceRange(cm.getLine(range.head.line) + "\n", Pos(range.head.line, 0));
         else
           cm.replaceRange(cm.getRange(range.from(), range.to()), range.from());
       }
       cm.scrollIntoView();
     });
   };
 
-  map[ctrl + "T"] = "transposeChars";
+  if (!mac) map[ctrl + "T"] = "transposeChars";
 
   function sortLines(cm, caseSensitive) {
     if (cm.isReadOnly()) return CodeMirror.Pass
     var ranges = cm.listSelections(), toSort = [], selected;
     for (var i = 0; i < ranges.length; i++) {
       var range = ranges[i];
       if (range.empty()) continue;
       var from = range.from().line, to = range.to().line;
       while (i < ranges.length - 1 && ranges[i + 1].from().line == to)
-        to = range[++i].to().line;
+        to = ranges[++i].to().line;
+      if (!ranges[i].to().ch) to--;
       toSort.push(from, to);
     }
     if (toSort.length) selected = true;
     else toSort.push(cm.firstLine(), cm.lastLine());
 
     cm.operation(function() {
       var ranges = [];
       for (var i = 0; i < toSort.length; i += 2) {
@@ -318,17 +334,17 @@
           lines.sort();
         else
           lines.sort(function(a, b) {
             var au = a.toUpperCase(), bu = b.toUpperCase();
             if (au != bu) { a = au; b = bu; }
             return a < b ? -1 : a == b ? 0 : 1;
           });
         cm.replaceRange(lines, start, end);
-        if (selected) ranges.push({anchor: start, head: end});
+        if (selected) ranges.push({anchor: start, head: Pos(to + 1, 0)});
       }
       if (selected) cm.setSelections(ranges, 0);
     });
   }
 
   cmds[map["F9"] = "sortLines"] = function(cm) { sortLines(cm, true); };
   cmds[map[ctrl + "F9"] = "sortLinesInsensitive"] = function(cm) { sortLines(cm, false); };
 
@@ -563,17 +579,17 @@
       if (cur.from().line <= target.from.line && cur.from().ch <= target.from.ch)
         primaryIndex++;
     }
     cm.setSelections(matches, primaryIndex);
   };
 
   map["Shift-" + ctrl + "["] = "fold";
   map["Shift-" + ctrl + "]"] = "unfold";
-  map[cK + ctrl + "0"] = map[cK + ctrl + "j"] = "unfoldAll";
+  map[cK + ctrl + "0"] = map[cK + ctrl + "J"] = "unfoldAll";
 
   map[ctrl + "I"] = "findIncremental";
   map["Shift-" + ctrl + "I"] = "findIncrementalReverse";
   map[ctrl + "H"] = "replace";
   map["F3"] = "findNext";
   map["Shift-F3"] = "findPrev";
 
   CodeMirror.normalizeKeyMap(map);
--- a/devtools/client/sourceeditor/codemirror/keymap/vim.js
+++ b/devtools/client/sourceeditor/codemirror/keymap/vim.js
@@ -67,16 +67,17 @@
     { keys: 's', type: 'keyToKey', toKeys: 'c', context: 'visual'},
     { keys: 'S', type: 'keyToKey', toKeys: 'cc', context: 'normal' },
     { keys: 'S', type: 'keyToKey', toKeys: 'VdO', context: 'visual' },
     { keys: '<Home>', type: 'keyToKey', toKeys: '0' },
     { keys: '<End>', type: 'keyToKey', toKeys: '$' },
     { keys: '<PageUp>', type: 'keyToKey', toKeys: '<C-b>' },
     { keys: '<PageDown>', type: 'keyToKey', toKeys: '<C-f>' },
     { keys: '<CR>', type: 'keyToKey', toKeys: 'j^', context: 'normal' },
+    { keys: '<Ins>', type: 'action', action: 'toggleOverwrite', context: 'insert' },
     // Motions
     { keys: 'H', type: 'motion', motion: 'moveToTopLine', motionArgs: { linewise: true, toJumplist: true }},
     { keys: 'M', type: 'motion', motion: 'moveToMiddleLine', motionArgs: { linewise: true, toJumplist: true }},
     { keys: 'L', type: 'motion', motion: 'moveToBottomLine', motionArgs: { linewise: true, toJumplist: true }},
     { keys: 'h', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: false }},
     { keys: 'l', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: true }},
     { keys: 'j', type: 'motion', motion: 'moveByLines', motionArgs: { forward: true, linewise: true }},
     { keys: 'k', type: 'motion', motion: 'moveByLines', motionArgs: { forward: false, linewise: true }},
@@ -136,17 +137,17 @@
     { keys: 'gU', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: false}, isEdit: true },
     { keys: 'n', type: 'motion', motion: 'findNext', motionArgs: { forward: true, toJumplist: true }},
     { keys: 'N', type: 'motion', motion: 'findNext', motionArgs: { forward: false, toJumplist: true }},
     // Operator-Motion dual commands
     { keys: 'x', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorMotionArgs: { visualLine: false }},
     { keys: 'X', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: false }, operatorMotionArgs: { visualLine: true }},
     { keys: 'D', type: 'operatorMotion', operator: 'delete', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
     { keys: 'D', type: 'operator', operator: 'delete', operatorArgs: { linewise: true }, context: 'visual'},
-    { keys: 'Y', type: 'operatorMotion', operator: 'yank', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
+    { keys: 'Y', type: 'operatorMotion', operator: 'yank', motion: 'expandToLine', motionArgs: { linewise: true }, context: 'normal'},
     { keys: 'Y', type: 'operator', operator: 'yank', operatorArgs: { linewise: true }, context: 'visual'},
     { keys: 'C', type: 'operatorMotion', operator: 'change', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
     { keys: 'C', type: 'operator', operator: 'change', operatorArgs: { linewise: true }, context: 'visual'},
     { keys: '~', type: 'operatorMotion', operator: 'changeCase', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorArgs: { shouldMoveCursor: true }, context: 'normal'},
     { keys: '~', type: 'operator', operator: 'changeCase', context: 'visual'},
     { keys: '<C-w>', type: 'operatorMotion', operator: 'delete', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: false }, context: 'insert' },
     // Actions
     { keys: '<C-i>', type: 'action', action: 'jumpListWalk', actionArgs: { forward: true }},
@@ -184,16 +185,18 @@
     { keys: 'z.', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'center' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
     { keys: 'zt', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }},
     { keys: 'z<CR>', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
     { keys: 'z-', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }},
     { keys: 'zb', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
     { keys: '.', type: 'action', action: 'repeatLastEdit' },
     { keys: '<C-a>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: true, backtrack: false}},
     { keys: '<C-x>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: false, backtrack: false}},
+    { keys: '<C-t>', type: 'action', action: 'indent', actionArgs: { indentRight: true }, context: 'insert' },
+    { keys: '<C-d>', type: 'action', action: 'indent', actionArgs: { indentRight: false }, context: 'insert' },
     // Text object motions
     { keys: 'a<character>', type: 'motion', motion: 'textObjectManipulation' },
     { keys: 'i<character>', type: 'motion', motion: 'textObjectManipulation', motionArgs: { textObjectInner: true }},
     // Search
     { keys: '/', type: 'search', searchArgs: { forward: true, querySrc: 'prompt', toJumplist: true }},
     { keys: '?', type: 'search', searchArgs: { forward: false, querySrc: 'prompt', toJumplist: true }},
     { keys: '*', type: 'search', searchArgs: { forward: true, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
     { keys: '#', type: 'search', searchArgs: { forward: false, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
@@ -251,17 +254,17 @@
       cm.state.vim = null;
     }
 
     function detachVimMap(cm, next) {
       if (this == CodeMirror.keyMap.vim)
         CodeMirror.rmClass(cm.getWrapperElement(), "cm-fat-cursor");
 
       if (!next || next.attach != attachVimMap)
-        leaveVimMode(cm, false);
+        leaveVimMode(cm);
     }
     function attachVimMap(cm, prev) {
       if (this == CodeMirror.keyMap.vim)
         CodeMirror.addClass(cm.getWrapperElement(), "cm-fat-cursor");
 
       if (!prev || prev.attach != attachVimMap)
         enterVimMode(cm);
     }
@@ -271,29 +274,30 @@
       if (val && cm.getOption("keyMap") != "vim")
         cm.setOption("keyMap", "vim");
       else if (!val && prev != CodeMirror.Init && /^vim/.test(cm.getOption("keyMap")))
         cm.setOption("keyMap", "default");
     });
 
     function cmKey(key, cm) {
       if (!cm) { return undefined; }
+      if (this[key]) { return this[key]; }
       var vimKey = cmKeyToVimKey(key);
       if (!vimKey) {
         return false;
       }
       var cmd = CodeMirror.Vim.findKey(cm, vimKey);
       if (typeof cmd == 'function') {
         CodeMirror.signal(cm, 'vim-keypress', vimKey);
       }
       return cmd;
     }
 
     var modifiers = {'Shift': 'S', 'Ctrl': 'C', 'Alt': 'A', 'Cmd': 'D', 'Mod': 'A'};
-    var specialKeys = {Enter:'CR',Backspace:'BS',Delete:'Del'};
+    var specialKeys = {Enter:'CR',Backspace:'BS',Delete:'Del',Insert:'Ins'};
     function cmKeyToVimKey(key) {
       if (key.charAt(0) == '\'') {
         // Keypress character binding of format "'a'"
         return key.charAt(1);
       }
       var pieces = key.split(/-(?!$)/);
       var lastPiece = pieces[pieces.length - 1];
       if (pieces.length == 1 && pieces[0].length == 1) {
@@ -402,21 +406,21 @@
       }
     }
 
     function setOption(name, value, cm, cfg) {
       var option = options[name];
       cfg = cfg || {};
       var scope = cfg.scope;
       if (!option) {
-        throw Error('Unknown option: ' + name);
+        return new Error('Unknown option: ' + name);
       }
       if (option.type == 'boolean') {
         if (value && value !== true) {
-          throw Error('Invalid argument: ' + name + '=' + value);
+          return new Error('Invalid argument: ' + name + '=' + value);
         } else if (value !== false) {
           // Boolean options are set to true if value is not defined.
           value = true;
         }
       }
       if (option.callback) {
         if (scope !== 'local') {
           option.callback(value, undefined);
@@ -434,17 +438,17 @@
       }
     }
 
     function getOption(name, cm, cfg) {
       var option = options[name];
       cfg = cfg || {};
       var scope = cfg.scope;
       if (!option) {
-        throw Error('Unknown option: ' + name);
+        return new Error('Unknown option: ' + name);
       }
       if (option.callback) {
         var local = cm && option.callback(undefined, cm);
         if (scope !== 'global' && local !== undefined) {
           return local;
         }
         if (scope !== 'local') {
           return option.callback();
@@ -640,19 +644,19 @@
         // Replace part of the last substituted pattern
         lastSubstituteReplacePart: undefined,
         jumpList: createCircularJumpList(),
         macroModeState: new MacroModeState,
         // Recording latest f, t, F or T motion command.
         lastCharacterSearch: {increment:0, forward:true, selectedCharacter:''},
         registerController: new RegisterController({}),
         // search history buffer
-        searchHistoryController: new HistoryController({}),
+        searchHistoryController: new HistoryController(),
         // ex Command history buffer
-        exCommandHistoryController : new HistoryController({})
+        exCommandHistoryController : new HistoryController()
       };
       for (var optionName in options) {
         var option = options[optionName];
         option.value = option.defaultValue;
       }
     }
 
     var lastInsertModeKeyTimer;
@@ -773,18 +777,22 @@
             lastInsertModeKeyTimer = window.setTimeout(
               function() { if (vim.insertMode && vim.inputState.keyBuffer) { clearInputState(cm); } },
               getOption('insertModeEscKeysTimeout'));
             return !keysAreChars;
           }
 
           if (lastInsertModeKeyTimer) { window.clearTimeout(lastInsertModeKeyTimer); }
           if (keysAreChars) {
-            var here = cm.getCursor();
-            cm.replaceRange('', offsetCursor(here, 0, -(keys.length - 1)), here, '+input');
+            var selections = cm.listSelections();
+            for (var i = 0; i < selections.length; i++) {
+              var here = selections[i].head;
+              cm.replaceRange('', offsetCursor(here, 0, -(keys.length - 1)), here, '+input');
+            }
+            vimGlobalState.macroModeState.lastInsertModeChanges.changes.pop();
           }
           clearInputState(cm);
           return match.command;
         }
 
         function handleKeyNonInsertMode() {
           if (handleMacroRecording() || handleEsc()) { return true; };
 
@@ -811,17 +819,17 @@
         if (vim.insertMode) { command = handleKeyInsertMode(); }
         else { command = handleKeyNonInsertMode(); }
         if (command === false) {
           return undefined;
         } else if (command === true) {
           // TODO: Look into using CodeMirror's multi-key handling.
           // Return no-op since we are caching the key. Counts as handled, but
           // don't want act on it just yet.
-          return function() {};
+          return function() { return true; };
         } else {
           return function() {
             return cm.operation(function() {
               cm.curOp.isVimOp = true;
               try {
                 if (command.type == 'keyToKey') {
                   doKeyToKey(command.toKeys);
                 } else {
@@ -945,17 +953,17 @@
     /**
      * Defines an external register.
      *
      * The name should be a single character that will be used to reference the register.
      * The register should support setText, pushText, clear, and toString(). See Register
      * for a reference implementation.
      */
     function defineRegister(name, register) {
-      var registers = vimGlobalState.registerController.registers[name];
+      var registers = vimGlobalState.registerController.registers;
       if (!name || name.length != 1) {
         throw Error('Register name must be 1 character');
       }
       if (registers[name]) {
         throw Error('Register already defined ' + name);
       }
       registers[name] = register;
       validRegisters.push(name);
@@ -973,19 +981,16 @@
       this.registers = registers;
       this.unnamedRegister = registers['"'] = new Register();
       registers['.'] = new Register();
       registers[':'] = new Register();
       registers['/'] = new Register();
     }
     RegisterController.prototype = {
       pushText: function(registerName, operator, text, linewise, blockwise) {
-        if (linewise && text.charAt(0) == '\n') {
-          text = text.slice(1) + '\n';
-        }
         if (linewise && text.charAt(text.length - 1) !== '\n'){
           text += '\n';
         }
         // Lowercase and uppercase registers refer to the same register.
         // Uppercase just means append.
         var register = this.isValidRegister(registerName) ?
             this.getRegister(registerName) : null;
         // if no register/an invalid register was specified, things go to the
@@ -1097,17 +1102,19 @@
         var bestMatch;
         for (var i = 0; i < matches.full.length; i++) {
           var match = matches.full[i];
           if (!bestMatch) {
             bestMatch = match;
           }
         }
         if (bestMatch.keys.slice(-11) == '<character>') {
-          inputState.selectedCharacter = lastChar(keys);
+          var character = lastChar(keys);
+          if (!character) return {type: 'none'};
+          inputState.selectedCharacter = character;
         }
         return {type: 'full', command: bestMatch};
       },
       processCommand: function(cm, vim, command) {
         vim.inputState.repeatOverride = command.repeatOverride;
         switch (command.type) {
           case 'motion':
             this.processMotion(cm, vim, command);
@@ -1232,21 +1239,23 @@
           cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
           handleQuery(query, true /** ignoreCase */, true /** smartCase */);
           var macroModeState = vimGlobalState.macroModeState;
           if (macroModeState.isRecording) {
             logSearchQuery(macroModeState, query);
           }
         }
         function onPromptKeyUp(e, query, close) {
-          var keyName = CodeMirror.keyName(e), up;
+          var keyName = CodeMirror.keyName(e), up, offset;
           if (keyName == 'Up' || keyName == 'Down') {
             up = keyName == 'Up' ? true : false;
+            offset = e.target ? e.target.selectionEnd : 0;
             query = vimGlobalState.searchHistoryController.nextMatch(query, up) || '';
             close(query);
+            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
           } else {
             if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
               vimGlobalState.searchHistoryController.reset();
           }
           var parsedQuery;
           try {
             parsedQuery = updateSearchQuery(cm, query,
                 true /** ignoreCase */, true /** smartCase */);
@@ -1268,16 +1277,18 @@
             vimGlobalState.searchHistoryController.reset();
             updateSearchQuery(cm, originalQuery);
             clearSearchHighlight(cm);
             cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
             CodeMirror.e_stop(e);
             clearInputState(cm);
             close();
             cm.focus();
+          } else if (keyName == 'Up' || keyName == 'Down') {
+            CodeMirror.e_stop(e);
           } else if (keyName == 'Ctrl-U') {
             // Ctrl-U clears input.
             CodeMirror.e_stop(e);
             close('');
           }
         }
         switch (command.searchArgs.querySrc) {
           case 'prompt':
@@ -1331,30 +1342,33 @@
         function onPromptClose(input) {
           // Give the prompt some time to close so that if processCommand shows
           // an error, the elements don't overlap.
           vimGlobalState.exCommandHistoryController.pushInput(input);
           vimGlobalState.exCommandHistoryController.reset();
           exCommandDispatcher.processCommand(cm, input);
         }
         function onPromptKeyDown(e, input, close) {
-          var keyName = CodeMirror.keyName(e), up;
+          var keyName = CodeMirror.keyName(e), up, offset;
           if (keyName == 'Esc' || keyName == 'Ctrl-C' || keyName == 'Ctrl-[' ||
               (keyName == 'Backspace' && input == '')) {
             vimGlobalState.exCommandHistoryController.pushInput(input);
             vimGlobalState.exCommandHistoryController.reset();
             CodeMirror.e_stop(e);
             clearInputState(cm);
             close();
             cm.focus();
           }
           if (keyName == 'Up' || keyName == 'Down') {
+            CodeMirror.e_stop(e);
             up = keyName == 'Up' ? true : false;
+            offset = e.target ? e.target.selectionEnd : 0;
             input = vimGlobalState.exCommandHistoryController.nextMatch(input, up) || '';
             close(input);
+            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
           } else if (keyName == 'Ctrl-U') {
             // Ctrl-U clears input.
             CodeMirror.e_stop(e);
             close('');
           } else {
             if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
               vimGlobalState.exCommandHistoryController.reset();
           }
@@ -1607,19 +1621,18 @@
         }
         var prev = !motionArgs.forward;
         // If search is initiated with ? instead of /, negate direction.
         prev = (state.isReversed()) ? !prev : prev;
         highlightSearchMatches(cm, query);
         return findNext(cm, prev/** prev */, query, motionArgs.repeat);
       },
       goToMark: function(cm, _head, motionArgs, vim) {
-        var mark = vim.marks[motionArgs.selectedCharacter];
-        if (mark) {
-          var pos = mark.find();
+        var pos = getMarkPos(cm, vim, motionArgs.selectedCharacter);
+        if (pos) {
           return motionArgs.linewise ? { line: pos.line, ch: findFirstNonWhiteSpaceCharacter(cm.getLine(pos.line)) } : pos;
         }
         return null;
       },
       moveToOtherHighlightedEnd: function(cm, _head, motionArgs, vim) {
         if (vim.visualBlock && motionArgs.sameLine) {
           var sel = vim.sel;
           return [
@@ -1817,26 +1830,26 @@
                    findFirstNonWhiteSpaceCharacter(cm.getLine(cursor.line)));
       },
       moveToMatchedSymbol: function(cm, head) {
         var cursor = head;
         var line = cursor.line;
         var ch = cursor.ch;
         var lineText = cm.getLine(line);
         var symbol;
-        do {
-          symbol = lineText.charAt(ch++);
+        for (; ch < lineText.length; ch++) {
+          symbol = lineText.charAt(ch);
           if (symbol && isMatchableSymbol(symbol)) {
-            var style = cm.getTokenTypeAt(Pos(line, ch));
+            var style = cm.getTokenTypeAt(Pos(line, ch + 1));
             if (style !== "string" && style !== "comment") {
               break;
             }
           }
-        } while (symbol);
-        if (symbol) {
+        }
+        if (ch < lineText.length) {
           var matched = cm.findMatchingBracket(Pos(line, ch));
           return matched.to;
         } else {
           return cursor;
         }
       },
       moveToStartOfLine: function(_cm, head) {
         return Pos(head.line, 0);
@@ -2167,17 +2180,30 @@
         }
         while(repeat--){
           executeMacroRegister(cm, vim, macroModeState, registerName);
         }
       },
       enterMacroRecordMode: function(cm, actionArgs) {
         var macroModeState = vimGlobalState.macroModeState;
         var registerName = actionArgs.selectedCharacter;
-        macroModeState.enterMacroRecordMode(cm, registerName);
+        if (vimGlobalState.registerController.isValidRegister(registerName)) {
+          macroModeState.enterMacroRecordMode(cm, registerName);
+        }
+      },
+      toggleOverwrite: function(cm) {
+        if (!cm.state.overwrite) {
+          cm.toggleOverwrite(true);
+          cm.setOption('keyMap', 'vim-replace');
+          CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
+        } else {
+          cm.toggleOverwrite(false);
+          cm.setOption('keyMap', 'vim-insert');
+          CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
+        }
       },
       enterInsertMode: function(cm, actionArgs, vim) {
         if (cm.getOption('readOnly')) { return; }
         vim.insertMode = true;
         vim.insertModeRepeat = actionArgs && actionArgs.repeat || 1;
         var insertAt = (actionArgs) ? actionArgs.insertAt : null;
         var sel = vim.sel;
         var head = actionArgs.head || cm.getCursor('head');
@@ -2214,24 +2240,24 @@
                 Math.max(sel.head.ch + 1, sel.anchor.ch));
             height = Math.abs(sel.head.line - sel.anchor.line) + 1;
           }
         } else if (insertAt == 'inplace') {
           if (vim.visualMode){
             return;
           }
         }
-        cm.setOption('keyMap', 'vim-insert');
         cm.setOption('disableInput', false);
         if (actionArgs && actionArgs.replace) {
           // Handle Replace-mode as a special case of insert mode.
           cm.toggleOverwrite(true);
           cm.setOption('keyMap', 'vim-replace');
           CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
         } else {
+          cm.toggleOverwrite(false);
           cm.setOption('keyMap', 'vim-insert');
           CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
         }
         if (!vimGlobalState.macroModeState.isPlaying) {
           // Only record if not replaying.
           cm.on('change', onChange);
           CodeMirror.on(cm.getInputField(), 'keydown', onKeyEventTargetKeyDown);
         }
@@ -2594,16 +2620,19 @@
         var repeat = actionArgs.repeat;
         if (repeat && actionArgs.repeatIsExplicit) {
           vim.lastEditInputState.repeatOverride = repeat;
         } else {
           repeat = vim.lastEditInputState.repeatOverride || repeat;
         }
         repeatLastEdit(cm, vim, repeat, false /** repeatForInsert */);
       },
+      indent: function(cm, actionArgs) {
+        cm.indentLine(cm.getCursor().line, actionArgs.indentRight);
+      },
       exitInsertMode: exitInsertMode
     };
 
     function defineAction(name, fn) {
       actions[name] = fn;
     }
 
     /*
@@ -2671,27 +2700,28 @@
         return pressedPrefix == mappedPrefix && pressed.length > prefixLen ? 'full' :
                mappedPrefix.indexOf(pressedPrefix) == 0 ? 'partial' : false;
       } else {
         return pressed == mapped ? 'full' :
                mapped.indexOf(pressed) == 0 ? 'partial' : false;
       }
     }
     function lastChar(keys) {
-      var match = /^.*(<[\w\-]+>)$/.exec(keys);
+      var match = /^.*(<[^>]+>)$/.exec(keys);
       var selectedCharacter = match ? match[1] : keys.slice(-1);
       if (selectedCharacter.length > 1){
         switch(selectedCharacter){
           case '<CR>':
             selectedCharacter='\n';
             break;
           case '<Space>':
             selectedCharacter=' ';
             break;
           default:
+            selectedCharacter='';
             break;
         }
       }
       return selectedCharacter;
     }
     function repeatFn(cm, fn, repeat) {
       return function() {
         for (var i = 0; i < repeat; i++) {
@@ -2782,17 +2812,16 @@
       } else if (dir < 0 && newDir == -1) {
         baseCh--;
         headCh++;
       }
       for (var line = firstLine; line <= lastLine; line++) {
         var range = {anchor: new Pos(line, baseCh), head: new Pos(line, headCh)};
         selections.push(range);
       }
-      primIndex = head.line == lastLine ? selections.length - 1 : 0;
       cm.setSelections(selections);
       selectionEnd.ch = headCh;
       base.ch = baseCh;
       return base;
     }
     function selectForInsert(cm, head, height) {
       var sel = [];
       for (var i = 0; i < height; i++) {
@@ -3939,16 +3968,27 @@
       var occludeToleranceTop = 6;
       var occludeToleranceBottom = 10;
       var from = cm.coordsChar({left:0, top: occludeToleranceTop + scrollInfo.top}, 'local');
       var bottomY = scrollInfo.clientHeight - occludeToleranceBottom + scrollInfo.top;
       var to = cm.coordsChar({left:0, top: bottomY}, 'local');
       return {top: from.line, bottom: to.line};
     }
 
+    function getMarkPos(cm, vim, markName) {
+      if (markName == '\'') {
+        var history = cm.doc.history.done;
+        var event = history[history.length - 2];
+        return event && event.ranges && event.ranges[0].head;
+      }
+
+      var mark = vim.marks[markName];
+      return mark && mark.find();
+    }
+
     var ExCommandDispatcher = function() {
       this.buildCommandMap_();
     };
     ExCommandDispatcher.prototype = {
       processCommand: function(cm, input, opt_params) {
         var that = this;
         cm.operation(function () {
           cm.curOp.isVimOp = true;
@@ -4039,34 +4079,52 @@
           result.commandName = inputStream.match(/.*/)[0];
         }
 
         return result;
       },
       parseLineSpec_: function(cm, inputStream) {
         var numberMatch = inputStream.match(/^(\d+)/);
         if (numberMatch) {
+          // Absolute line number plus offset (N+M or N-M) is probably a typo,
+          // not something the user actually wanted. (NB: vim does allow this.)
           return parseInt(numberMatch[1], 10) - 1;
         }
         switch (inputStream.next()) {
           case '.':
-            return cm.getCursor().line;
+            return this.parseLineSpecOffset_(inputStream, cm.getCursor().line);
           case '$':
-            return cm.lastLine();
+            return this.parseLineSpecOffset_(inputStream, cm.lastLine());
           case '\'':
-            var mark = cm.state.vim.marks[inputStream.next()];
-            if (mark && mark.find()) {
-              return mark.find().line;
-            }
-            throw new Error('Mark not set');
+            var markName = inputStream.next();
+            var markPos = getMarkPos(cm, cm.state.vim, markName);
+            if (!markPos) throw new Error('Mark not set');
+            return this.parseLineSpecOffset_(inputStream, markPos.line);
+          case '-':
+          case '+':
+            inputStream.backUp(1);
+            // Offset is relative to current line if not otherwise specified.
+            return this.parseLineSpecOffset_(inputStream, cm.getCursor().line);
           default:
             inputStream.backUp(1);
             return undefined;
         }
       },
+      parseLineSpecOffset_: function(inputStream, line) {
+        var offsetMatch = inputStream.match(/^([+-])?(\d+)/);
+        if (offsetMatch) {
+          var offset = parseInt(offsetMatch[2], 10);
+          if (offsetMatch[1] == "-") {
+            line -= offset;
+          } else {
+            line += offset;
+          }
+        }
+        return line;
+      },
       parseCommandArgs_: function(inputStream, params, command) {
         if (inputStream.eol()) {
           return;
         }
         params.argString = inputStream.match(/.*/)[0];
         // Parse command-line arguments
         var delim = command.argDelimiter || /\s+/;
         var args = trim(params.argString).split(delim);
@@ -4120,27 +4178,26 @@
             };
           }
         } else {
           if (rhs != ':' && rhs.charAt(0) == ':') {
             // Key to Ex mapping.
             var mapping = {
               keys: lhs,
               type: 'keyToEx',
-              exArgs: { input: rhs.substring(1) },
-              user: true};
+              exArgs: { input: rhs.substring(1) }
+            };
             if (ctx) { mapping.context = ctx; }
             defaultKeymap.unshift(mapping);
           } else {
             // Key to key mapping
             var mapping = {
               keys: lhs,
               type: 'keyToKey',
-              toKeys: rhs,
-              user: true
+              toKeys: rhs
             };
             if (ctx) { mapping.context = ctx; }
             defaultKeymap.unshift(mapping);
           }
         }
       },
       unmap: function(lhs, ctx) {
         if (lhs != ':' && lhs.charAt(0) == ':') {
@@ -4151,18 +4208,17 @@
             delete this.commandMap_[commandName];
             return;
           }
         } else {
           // Key to Ex or key to key mapping
           var keys = lhs;
           for (var i = 0; i < defaultKeymap.length; i++) {
             if (keys == defaultKeymap[i].keys
-                && defaultKeymap[i].context === ctx
-                && defaultKeymap[i].user) {
+                && defaultKeymap[i].context === ctx) {
               defaultKeymap.splice(i, 1);
               return;
             }
           }
         }
         throw Error('No such mapping.');
       }
     };
@@ -4238,23 +4294,28 @@
         var optionIsBoolean = options[optionName] && options[optionName].type == 'boolean';
         if (optionIsBoolean && value == undefined) {
           // Calling set with a boolean option sets it to true.
           value = true;
         }
         // If no value is provided, then we assume this is a get.
         if (!optionIsBoolean && value === undefined || forceGet) {
           var oldValue = getOption(optionName, cm, setCfg);
-          if (oldValue === true || oldValue === false) {
+          if (oldValue instanceof Error) {
+            showConfirm(cm, oldValue.message);
+          } else if (oldValue === true || oldValue === false) {
             showConfirm(cm, ' ' + (oldValue ? '' : 'no') + optionName);
           } else {
             showConfirm(cm, '  ' + optionName + '=' + oldValue);
           }
         } else {
-          setOption(optionName, value, cm, setCfg);
+          var setOptionReturn = setOption(optionName, value, cm, setCfg);
+          if (setOptionReturn instanceof Error) {
+            showConfirm(cm, setOptionReturn.message);
+          }
         }
       },
       setlocal: function (cm, params) {
         // setCfg is passed through to setOption
         params.setCfg = {scope: 'local'};
         this.set(cm, params);
       },
       setglobal: function (cm, params) {
@@ -4283,56 +4344,62 @@
             }
             var register = registers[registerName] || new Register();
             regInfo += '"' + registerName + '    ' + register.toString() + '<br>';
           }
         }
         showConfirm(cm, regInfo);
       },
       sort: function(cm, params) {
-        var reverse, ignoreCase, unique, number;
+        var reverse, ignoreCase, unique, number, pattern;
         function parseArgs() {
           if (params.argString) {
             var args = new CodeMirror.StringStream(params.argString);
             if (args.eat('!')) { reverse = true; }
             if (args.eol()) { return; }
             if (!args.eatSpace()) { return 'Invalid arguments'; }
-            var opts = args.match(/[a-z]+/);
-            if (opts) {
-              opts = opts[0];
-              ignoreCase = opts.indexOf('i') != -1;
-              unique = opts.indexOf('u') != -1;
-              var decimal = opts.indexOf('d') != -1 && 1;
-              var hex = opts.indexOf('x') != -1 && 1;
-              var octal = opts.indexOf('o') != -1 && 1;
+            var opts = args.match(/([dinuox]+)?\s*(\/.+\/)?\s*/);
+            if (!opts && !args.eol()) { return 'Invalid arguments'; }
+            if (opts[1]) {
+              ignoreCase = opts[1].indexOf('i') != -1;
+              unique = opts[1].indexOf('u') != -1;
+              var decimal = opts[1].indexOf('d') != -1 || opts[1].indexOf('n') != -1 && 1;
+              var hex = opts[1].indexOf('x') != -1 && 1;
+              var octal = opts[1].indexOf('o') != -1 && 1;
               if (decimal + hex + octal > 1) { return 'Invalid arguments'; }
               number = decimal && 'decimal' || hex && 'hex' || octal && 'octal';
             }
-            if (args.match(/\/.*\//)) { return 'patterns not supported'; }
+            if (opts[2]) {
+              pattern = new RegExp(opts[2].substr(1, opts[2].length - 2), ignoreCase ? 'i' : '');
+            }
           }
         }
         var err = parseArgs();
         if (err) {
           showConfirm(cm, err + ': ' + params.argString);
           return;
         }
         var lineStart = params.line || cm.firstLine();
         var lineEnd = params.lineEnd || params.line || cm.lastLine();
         if (lineStart == lineEnd) { return; }
         var curStart = Pos(lineStart, 0);
         var curEnd = Pos(lineEnd, lineLength(cm, lineEnd));
         var text = cm.getRange(curStart, curEnd).split('\n');
-        var numberRegex = (number == 'decimal') ? /(-?)([\d]+)/ :
+        var numberRegex = pattern ? pattern :
+           (number == 'decimal') ? /(-?)([\d]+)/ :
            (number == 'hex') ? /(-?)(?:0x)?([0-9a-f]+)/i :
            (number == 'octal') ? /([0-7]+)/ : null;
         var radix = (number == 'decimal') ? 10 : (number == 'hex') ? 16 : (number == 'octal') ? 8 : null;
         var numPart = [], textPart = [];
-        if (number) {
+        if (number || pattern) {
           for (var i = 0; i < text.length; i++) {
-            if (numberRegex.exec(text[i])) {
+            var matchPart = pattern ? text[i].match(pattern) : null;
+            if (matchPart && matchPart[0] != '') {
+              numPart.push(matchPart);
+            } else if (!pattern && numberRegex.exec(text[i])) {
               numPart.push(text[i]);
             } else {
               textPart.push(text[i]);
             }
           }
         } else {
           textPart = text;
         }
@@ -4341,18 +4408,27 @@
           if (ignoreCase) { a = a.toLowerCase(); b = b.toLowerCase(); }
           var anum = number && numberRegex.exec(a);
           var bnum = number && numberRegex.exec(b);
           if (!anum) { return a < b ? -1 : 1; }
           anum = parseInt((anum[1] + anum[2]).toLowerCase(), radix);
           bnum = parseInt((bnum[1] + bnum[2]).toLowerCase(), radix);
           return anum - bnum;
         }
-        numPart.sort(compareFn);
-        textPart.sort(compareFn);
+        function comparePatternFn(a, b) {
+          if (reverse) { var tmp; tmp = a; a = b; b = tmp; }
+          if (ignoreCase) { a[0] = a[0].toLowerCase(); b[0] = b[0].toLowerCase(); }
+          return (a[0] < b[0]) ? -1 : 1;
+        }
+        numPart.sort(pattern ? comparePatternFn : compareFn);
+        if (pattern) {
+          for (var i = 0; i < numPart.length; i++) {
+            numPart[i] = numPart[i].input;
+          }
+        } else if (!number) { textPart.sort(compareFn); }
         text = (!reverse) ? textPart.concat(numPart) : numPart.concat(textPart);
         if (unique) { // Remove duplicate lines
           var textOld = text;
           var lastLine;
           text = [];
           for (var i = 0; i < textOld.length; i++) {
             if (textOld[i] != lastLine) {
               text.push(textOld[i]);
@@ -4428,16 +4504,20 @@
         var argString = params.argString;
         var tokens = argString ? splitBySlash(argString) : [];
         var regexPart, replacePart = '', trailing, flagsPart, count;
         var confirm = false; // Whether to confirm each replace.
         var global = false; // True to replace all instances on a line, false to replace only 1.
         if (tokens.length) {
           regexPart = tokens[0];
           replacePart = tokens[1];
+          if (regexPart && regexPart[regexPart.length - 1] === '$') {
+            regexPart = regexPart.slice(0, regexPart.length - 1) + '\\n';
+            replacePart = replacePart ? replacePart + '\n' : '\n';
+          }
           if (replacePart !== undefined) {
             if (getOption('pcre')) {
               replacePart = unescapeRegexReplace(replacePart);
             } else {
               replacePart = translateRegexReplace(replacePart);
             }
             vimGlobalState.lastSubstituteReplacePart = replacePart;
           }
@@ -4766,23 +4846,16 @@
 
     // The timeout in milliseconds for the two-character ESC keymap should be
     // adjusted according to your typing speed to prevent false positives.
     defineOption('insertModeEscKeysTimeout', 200, 'number');
 
     CodeMirror.keyMap['vim-insert'] = {
       // TODO: override navigation keys so that Esc will cancel automatic
       // indentation from o, O, i_<CR>
-      'Ctrl-N': 'autocomplete',
-      'Ctrl-P': 'autocomplete',
-      'Enter': function(cm) {
-        var fn = CodeMirror.commands.newlineAndIndentContinueComment ||
-            CodeMirror.commands.newlineAndIndent;
-        fn(cm);
-      },
       fallthrough: ['default'],
       attach: attachVimMap,
       detach: detachVimMap,
       call: cmKey
     };
 
     CodeMirror.keyMap['vim-replace'] = {
       'Backspace': 'goCharLeft',
@@ -4854,26 +4927,34 @@
         register.pushSearchQuery(query);
       }
     }
 
     /**
      * Listens for changes made in insert mode.
      * Should only be active in insert mode.
      */
-    function onChange(_cm, changeObj) {
+    function onChange(cm, changeObj) {
       var macroModeState = vimGlobalState.macroModeState;
       var lastChange = macroModeState.lastInsertModeChanges;
       if (!macroModeState.isPlaying) {
         while(changeObj) {
           lastChange.expectCursorActivityForChange = true;
           if (changeObj.origin == '+input' || changeObj.origin == 'paste'
               || changeObj.origin === undefined /* only in testing */) {
             var text = changeObj.text.join('\n');
-            lastChange.changes.push(text);
+            if (lastChange.maybeReset) {
+              lastChange.changes = [];
+              lastChange.maybeReset = false;
+            }
+            if (cm.state.overwrite && !/\n/.test(text)) {
+                lastChange.changes.push([text]);
+            } else {
+                lastChange.changes.push(text);
+            }
           }
           // Change objects may be chained with next.
           changeObj = changeObj.next;
         }
       }
     }
 
     /**
@@ -4885,17 +4966,17 @@
         // Tracking cursor activity in insert mode (for macro support).
         var macroModeState = vimGlobalState.macroModeState;
         if (macroModeState.isPlaying) { return; }
         var lastChange = macroModeState.lastInsertModeChanges;
         if (lastChange.expectCursorActivityForChange) {
           lastChange.expectCursorActivityForChange = false;
         } else {
           // Cursor moved outside the context of an edit. Reset the change.
-          lastChange.changes = [];
+          lastChange.maybeReset = true;
         }
       } else if (!cm.curOp.isVimOp) {
         handleExternalSelection(cm, vim);
       }
       if (vim.visualMode) {
         updateFakeCursor(cm);
       }
     }
@@ -4949,16 +5030,20 @@
     * - For recording deletes in insert mode.
     */
     function onKeyEventTargetKeyDown(e) {
       var macroModeState = vimGlobalState.macroModeState;
       var lastChange = macroModeState.lastInsertModeChanges;
       var keyName = CodeMirror.keyName(e);
       if (!keyName) { return; }
       function onKeyFound() {
+        if (lastChange.maybeReset) {
+          lastChange.changes = [];
+          lastChange.maybeReset = false;
+        }
         lastChange.changes.push(new InsertModeKey(keyName));
         return true;
       }
       if (keyName.indexOf('Delete') != -1 || keyName.indexOf('Backspace') != -1) {
         CodeMirror.lookupKey(keyName, 'vim-insert', onKeyFound);
       }
     }
 
@@ -5041,19 +5126,23 @@
       for (var i = 0; i < repeat; i++) {
         if (inVisualBlock) {
           cm.setCursor(offsetCursor(head, i, 0));
         }
         for (var j = 0; j < changes.length; j++) {
           var change = changes[j];
           if (change instanceof InsertModeKey) {
             CodeMirror.lookupKey(change.keyName, 'vim-insert', keyHandler);
-          } else {
+          } else if (typeof change == "string") {
             var cur = cm.getCursor();
             cm.replaceRange(change, cur, cur);
+          } else {
+            var start = cm.getCursor();
+            var end = offsetCursor(start, 0, change[0].length);
+            cm.replaceRange(change[0], start, end);
           }
         }
       }
       if (inVisualBlock) {
         cm.setCursor(offsetCursor(head, 0, 1));
       }
     }
 
--- a/devtools/client/sourceeditor/codemirror/lib/codemirror.css
+++ b/devtools/client/sourceeditor/codemirror/lib/codemirror.css
@@ -114,17 +114,17 @@
 .cm-s-default .cm-atom {color: #219;}
 .cm-s-default .cm-number {color: #164;}
 .cm-s-default .cm-def {color: #00f;}
 .cm-s-default .cm-variable,
 .cm-s-default .cm-punctuation,
 .cm-s-default .cm-property,
 .cm-s-default .cm-operator {}
 .cm-s-default .cm-variable-2 {color: #05a;}
-.cm-s-default .cm-variable-3 {color: #085;}
+.cm-s-default .cm-variable-3, .cm-s-default .cm-type {color: #085;}
 .cm-s-default .cm-comment {color: #a50;}
 .cm-s-default .cm-string {color: #a11;}
 .cm-s-default .cm-string-2 {color: #f50;}
 .cm-s-default .cm-meta {color: #555;}
 .cm-s-default .cm-qualifier {color: #555;}
 .cm-s-default .cm-builtin {color: #30a;}
 .cm-s-default .cm-bracket {color: #997;}
 .cm-s-default .cm-tag {color: #170;}
@@ -201,19 +201,16 @@ div.CodeMirror span.CodeMirror-nonmatchi
   z-index: 3;
 }
 .CodeMirror-gutter {
   white-space: normal;
   height: 100%;
   display: inline-block;
   vertical-align: top;
   margin-bottom: -30px;
-  /* Hack to make IE7 behave */
-  *zoom:1;
-  *display:inline;
 }
 .CodeMirror-gutter-wrapper {
   position: absolute;
   z-index: 4;
   background: none !important;
   border: none !important;
 }
 .CodeMirror-gutter-background {
@@ -221,21 +218,18 @@ div.CodeMirror span.CodeMirror-nonmatchi
   top: 0; bottom: 0;
   z-index: 4;
 }
 .CodeMirror-gutter-elt {
   position: absolute;
   cursor: default;
   z-index: 4;
 }
-.CodeMirror-gutter-wrapper {
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  user-select: none;
-}
+.CodeMirror-gutter-wrapper ::selection { background-color: transparent }
+.CodeMirror-gutter-wrapper ::-moz-selection { background-color: transparent }
 
 .CodeMirror-lines {
   cursor: text;
   min-height: 1px; /* prevents collapsing before first draw */
 }
 .CodeMirror pre {
   /* Reset some styles that the rest of the page might have set */
   -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;
@@ -247,18 +241,18 @@ div.CodeMirror span.CodeMirror-nonmatchi
   white-space: pre;
   word-wrap: normal;
   line-height: inherit;
   color: inherit;
   z-index: 2;
   position: relative;
   overflow: visible;
   -webkit-tap-highlight-color: transparent;
-  -webkit-font-variant-ligatures: none;
-  font-variant-ligatures: none;
+  -webkit-font-variant-ligatures: contextual;
+  font-variant-ligatures: contextual;
 }
 .CodeMirror-wrap pre {
   word-wrap: break-word;
   white-space: pre-wrap;
   word-break: normal;
 }
 
 .CodeMirror-linebackground {
@@ -270,16 +264,18 @@ div.CodeMirror span.CodeMirror-nonmatchi
 .CodeMirror-linewidget {
   position: relative;
   z-index: 2;
   overflow: auto;
 }
 
 .CodeMirror-widget {}
 
+.CodeMirror-rtl pre { direction: rtl; }
+
 .CodeMirror-code {
   outline: none;
 }
 
 /* Force content-box sizing for the elements where we expect it */
 .CodeMirror-scroll,
 .CodeMirror-sizer,
 .CodeMirror-gutter,
@@ -322,19 +318,16 @@ div.CodeMirror-dragcursors {
 .CodeMirror-line::selection, .CodeMirror-line > span::selection, .CodeMirror-line > span > span::selection { background: #d7d4f0; }
 .CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
 
 .cm-searching {
   background: #ffa;
   background: rgba(255, 255, 0, .4);
 }
 
-/* IE7 hack to prevent it from returning funny offsetTops on the spans */
-.CodeMirror span { *vertical-align: text-bottom; }
-
 /* Used to force a border model for a node */
 .cm-force-border { padding-right: .1px; }
 
 @media print {
   /* Hide the cursor when printing */
   .CodeMirror div.CodeMirror-cursors {
     visibility: hidden;
   }
--- a/devtools/client/sourceeditor/codemirror/lib/codemirror.js
+++ b/devtools/client/sourceeditor/codemirror/lib/codemirror.js
@@ -2,8921 +2,9489 @@
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
 // This is CodeMirror (http://codemirror.net), a code editor
 // implemented in JavaScript on top of the browser's DOM.
 //
 // You can find some technical background for some of the code below
 // at http://marijnhaverbeke.nl/blog/#cm-internals .
 
-(function(mod) {
-  if (typeof exports == "object" && typeof module == "object") // CommonJS
-    module.exports = mod();
-  else if (typeof define == "function" && define.amd) // AMD
-    return define([], mod);
-  else // Plain browser env
-    (this || window).CodeMirror = mod();
-})(function() {
-  "use strict";
-
-  // BROWSER SNIFFING
-
-  // Kludges for bugs and behavior differences that can't be feature
-  // detected are enabled based on userAgent etc sniffing.
-  var userAgent = navigator.userAgent;
-  var platform = navigator.platform;
-
-  var gecko = /gecko\/\d/i.test(userAgent);
-  var ie_upto10 = /MSIE \d/.test(userAgent);
-  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
-  var ie = ie_upto10 || ie_11up;
-  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]);
-  var webkit = /WebKit\//.test(userAgent);
-  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
-  var chrome = /Chrome\//.test(userAgent);
-  var presto = /Opera\//.test(userAgent);
-  var safari = /Apple Computer/.test(navigator.vendor);
-  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
-  var phantom = /PhantomJS/.test(userAgent);
-
-  var ios = /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
-  // This is woefully incomplete. Suggestions for alternative methods welcome.
-  var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
-  var mac = ios || /Mac/.test(platform);
-  var chromeOS = /\bCrOS\b/.test(userAgent);
-  var windows = /win/i.test(platform);
-
-  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
-  if (presto_version) presto_version = Number(presto_version[1]);
-  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
-  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
-  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
-  var captureRightClick = gecko || (ie && ie_version >= 9);
-
-  // Optimize some code when these features are not used.
-  var sawReadOnlySpans = false, sawCollapsedSpans = false;
-
-  // EDITOR CONSTRUCTOR
-
-  // A CodeMirror instance represents an editor. This is the object
-  // that user code is usually dealing with.
-
-  function CodeMirror(place, options) {
-    if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
-
-    this.options = options = options ? copyObj(options) : {};
-    // Determine effective options based on given values and defaults.
-    copyObj(defaults, options, false);
-    setGuttersForLineNumbers(options);
-
-    var doc = options.value;
-    if (typeof doc == "string") doc = new Doc(doc, options.mode, null, options.lineSeparator);
-    this.doc = doc;
-
-    var input = new CodeMirror.inputStyles[options.inputStyle](this);
-    var display = this.display = new Display(place, doc, input);
-    display.wrapper.CodeMirror = this;
-    updateGutters(this);
-    themeChanged(this);
-    if (options.lineWrapping)
-      this.display.wrapper.className += " CodeMirror-wrap";
-    if (options.autofocus && !mobile) display.input.focus();
-    initScrollbars(this);
-
-    this.state = {
-      keyMaps: [],  // stores maps added by addKeyMap
-      overlays: [], // highlighting overlays, as added by addOverlay
-      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
-      overwrite: false,
-      delayingBlurEvent: false,
-      focused: false,
-      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
-      pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
-      selectingText: false,
-      draggingText: false,
-      highlight: new Delayed(), // stores highlight worker timeout
-      keySeq: null,  // Unfinished key sequence
-      specialChars: null
-    };
-
-    var cm = this;
-
-    // Override magic textarea content restore that IE sometimes does
-    // on our hidden textarea on reload
-    if (ie && ie_version < 11) setTimeout(function() { cm.display.input.reset(true); }, 20);
-
-    registerEventHandlers(this);
-    ensureGlobalHandlers();
-
-    startOperation(this);
-    this.curOp.forceUpdate = true;
-    attachDoc(this, doc);
-
-    if ((options.autofocus && !mobile) || cm.hasFocus())
-      setTimeout(bind(onFocus, this), 20);
-    else
-      onBlur(this);
-
-    for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
-      optionHandlers[opt](this, options[opt], Init);
-    maybeUpdateLineNumberWidth(this);
-    if (options.finishInit) options.finishInit(this);
-    for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
-    endOperation(this);
-    // Suppress optimizelegibility in Webkit, since it breaks text
-    // measuring on line wrapping boundaries.
-    if (webkit && options.lineWrapping &&
-        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
-      display.lineDiv.style.textRendering = "auto";
-  }
-
-  // DISPLAY CONSTRUCTOR
-
-  // The display handles the DOM integration, both for input reading
-  // and content drawing. It holds references to DOM nodes and
-  // display-related state.
-
-  function Display(place, doc, input) {
-    var d = this;
-    this.input = input;
-
-    // Covers bottom-right square when both scrollbars are present.
-    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
-    d.scrollbarFiller.setAttribute("cm-not-content", "true");
-    // Covers bottom of gutter when coverGutterNextToScrollbar is on
-    // and h scrollbar is present.
-    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
-    d.gutterFiller.setAttribute("cm-not-content", "true");
-    // Will contain the actual code, positioned to cover the viewport.
-    d.lineDiv = elt("div", null, "CodeMirror-code");
-    // Elements are added to these to represent selection and cursors.
-    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
-    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
-    // A visibility: hidden element used to find the size of things.
-    d.measure = elt("div", null, "CodeMirror-measure");
-    // When lines outside of the viewport are measured, they are drawn in this.
-    d.lineMeasure = elt("div", null, "CodeMirror-measure");
-    // Wraps everything that needs to exist inside the vertically-padded coordinate system
-    d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
-                      null, "position: relative; outline: none");
-    // Moved around its parent to cover visible view.
-    d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
-    // Set to the height of the document, allowing scrolling.
-    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
-    d.sizerWidth = null;
-    // Behavior of elts with overflow: auto and padding is
-    // inconsistent across browsers. This is used to ensure the
-    // scrollable area is big enough.
-    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
-    // Will contain the gutters, if any.
-    d.gutters = elt("div", null, "CodeMirror-gutters");
-    d.lineGutter = null;
-    // Actual scrollable element.
-    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
-    d.scroller.setAttribute("tabIndex", "-1");
-    // The element in which the editor lives.
-    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
-
-    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
-    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
-    if (!webkit && !(gecko && mobile)) d.scroller.draggable = true;
-
-    if (place) {
-      if (place.appendChild) place.appendChild(d.wrapper);
-      else place(d.wrapper);
-    }
-
-    // Current rendered range (may be bigger than the view window).
-    d.viewFrom = d.viewTo = doc.first;
-    d.reportedViewFrom = d.reportedViewTo = doc.first;
-    // Information about the rendered lines.
-    d.view = [];
-    d.renderedView = null;
-    // Holds info about a single rendered line when it was rendered
-    // for measurement, while not in view.
-    d.externalMeasured = null;
-    // Empty space (in pixels) above the view
-    d.viewOffset = 0;
-    d.lastWrapHeight = d.lastWrapWidth = 0;
-    d.updateLineNumbers = null;
-
-    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
-    d.scrollbarsClipped = false;
-
-    // Used to only resize the line number gutter when necessary (when
-    // the amount of lines crosses a boundary that makes its width change)
-    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
-    // Set to true when a non-horizontal-scrolling line widget is
-    // added. As an optimization, line widget aligning is skipped when
-    // this is false.
-    d.alignWidgets = false;
-
-    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-
-    // Tracks the maximum line length so that the horizontal scrollbar
-    // can be kept static when scrolling.
-    d.maxLine = null;
-    d.maxLineLength = 0;
-    d.maxLineChanged = false;
-
-    // Used for measuring wheel scrolling granularity
-    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
-
-    // True when shift is held down.
-    d.shift = false;
-
-    // Used to track whether anything happened since the context menu
-    // was opened.
-    d.selForContextMenu = null;
-
-    d.activeTouch = null;
-
-    input.init(d);
-  }
-
-  // STATE UPDATES
-
-  // Used to get the editor into a consistent state again when options change.
-
-  function loadMode(cm) {
-    cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
-    resetModeState(cm);
-  }
-
-  function resetModeState(cm) {
-    cm.doc.iter(function(line) {
-      if (line.stateAfter) line.stateAfter = null;
-      if (line.styles) line.styles = null;
-    });
-    cm.doc.frontier = cm.doc.first;
-    startWorker(cm, 100);
-    cm.state.modeGen++;
-    if (cm.curOp) regChange(cm);
-  }
-
-  function wrappingChanged(cm) {
-    if (cm.options.lineWrapping) {
-      addClass(cm.display.wrapper, "CodeMirror-wrap");
-      cm.display.sizer.style.minWidth = "";
-      cm.display.sizerWidth = null;
-    } else {
-      rmClass(cm.display.wrapper, "CodeMirror-wrap");
-      findMaxLine(cm);
-    }
-    estimateLineHeights(cm);
-    regChange(cm);
-    clearCaches(cm);
-    setTimeout(function(){updateScrollbars(cm);}, 100);
-  }
-
-  // Returns a function that estimates the height of a line, to use as
-  // first approximation until the line becomes visible (and is thus
-  // properly measurable).
-  function estimateHeight(cm) {
-    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
-    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
-    return function(line) {
-      if (lineIsHidden(cm.doc, line)) return 0;
-
-      var widgetsHeight = 0;
-      if (line.widgets) for (var i = 0; i < line.widgets.length; i++) {
-        if (line.widgets[i].height) widgetsHeight += line.widgets[i].height;
-      }
-
-      if (wrapping)
-        return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th;
-      else
-        return widgetsHeight + th;
-    };
-  }
-
-  function estimateLineHeights(cm) {
-    var doc = cm.doc, est = estimateHeight(cm);
-    doc.iter(function(line) {
-      var estHeight = est(line);
-      if (estHeight != line.height) updateLineHeight(line, estHeight);
-    });
-  }
-
-  function themeChanged(cm) {
-    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
-      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
-    clearCaches(cm);
-  }
-
-  function guttersChanged(cm) {
-    updateGutters(cm);
-    regChange(cm);
-    setTimeout(function(){alignHorizontally(cm);}, 20);
-  }
-
-  // Rebuild the gutter elements, ensure the margin to the left of the
-  // code matches their width.
-  function updateGutters(cm) {
-    var gutters = cm.display.gutters, specs = cm.options.gutters;
-    removeChildren(gutters);
-    for (var i = 0; i < specs.length; ++i) {
-      var gutterClass = specs[i];
-      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
-      if (gutterClass == "CodeMirror-linenumbers") {
-        cm.display.lineGutter = gElt;
-        gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
-      }
-    }
-    gutters.style.display = i ? "" : "none";
-    updateGutterSpace(cm);
-  }
-
-  function updateGutterSpace(cm) {
-    var width = cm.display.gutters.offsetWidth;
-    cm.display.sizer.style.marginLeft = width + "px";
-  }
-
-  // Compute the character length of a line, taking into account
-  // collapsed ranges (see markText) that might hide parts, and join
-  // other lines onto it.
-  function lineLength(line) {
-    if (line.height == 0) return 0;
-    var len = line.text.length, merged, cur = line;
-    while (merged = collapsedSpanAtStart(cur)) {
-      var found = merged.find(0, true);
-      cur = found.from.line;
-      len += found.from.ch - found.to.ch;
-    }
-    cur = line;
-    while (merged = collapsedSpanAtEnd(cur)) {
-      var found = merged.find(0, true);
-      len -= cur.text.length - found.from.ch;
-      cur = found.to.line;
-      len += cur.text.length - found.to.ch;
-    }
-    return len;
-  }
-
-  // Find the longest line in the document.
-  function findMaxLine(cm) {
-    var d = cm.display, doc = cm.doc;
-    d.maxLine = getLine(doc, doc.first);
-    d.maxLineLength = lineLength(d.maxLine);
-    d.maxLineChanged = true;
-    doc.iter(function(line) {
-      var len = lineLength(line);
-      if (len > d.maxLineLength) {
-        d.maxLineLength = len;
-        d.maxLine = line;
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global.CodeMirror = factory());
+}(this, (function () { 'use strict';
+
+// Kludges for bugs and behavior differences that can't be feature
+// detected are enabled based on userAgent etc sniffing.
+var userAgent = navigator.userAgent
+var platform = navigator.platform
+
+var gecko = /gecko\/\d/i.test(userAgent)
+var ie_upto10 = /MSIE \d/.test(userAgent)
+var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent)
+var edge = /Edge\/(\d+)/.exec(userAgent)
+var ie = ie_upto10 || ie_11up || edge
+var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1])
+var webkit = !edge && /WebKit\//.test(userAgent)
+var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent)
+var chrome = !edge && /Chrome\//.test(userAgent)
+var presto = /Opera\//.test(userAgent)
+var safari = /Apple Computer/.test(navigator.vendor)
+var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent)
+var phantom = /PhantomJS/.test(userAgent)
+
+var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent)
+var android = /Android/.test(userAgent)
+// This is woefully incomplete. Suggestions for alternative methods welcome.
+var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent)
+var mac = ios || /Mac/.test(platform)
+var chromeOS = /\bCrOS\b/.test(userAgent)
+var windows = /win/i.test(platform)
+
+var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/)
+if (presto_version) { presto_version = Number(presto_version[1]) }
+if (presto_version && presto_version >= 15) { presto = false; webkit = true }
+// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11))
+var captureRightClick = gecko || (ie && ie_version >= 9)
+
+function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+var rmClass = function(node, cls) {
+  var current = node.className
+  var match = classTest(cls).exec(current)
+  if (match) {
+    var after = current.slice(match.index + match[0].length)
+    node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
+  }
+}
+
+function removeChildren(e) {
+  for (var count = e.childNodes.length; count > 0; --count)
+    { e.removeChild(e.firstChild) }
+  return e
+}
+
+function removeChildrenAndAdd(parent, e) {
+  return removeChildren(parent).appendChild(e)
+}
+
+function elt(tag, content, className, style) {
+  var e = document.createElement(tag)
+  if (className) { e.className = className }
+  if (style) { e.style.cssText = style }
+  if (typeof content == "string") { e.appendChild(document.createTextNode(content)) }
+  else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]) } }
+  return e
+}
+// wrapper for elt, which removes the elt from the accessibility tree
+function eltP(tag, content, className, style) {
+  var e = elt(tag, content, className, style)
+  e.setAttribute("role", "presentation")
+  return e
+}
+
+var range
+if (document.createRange) { range = function(node, start, end, endNode) {
+  var r = document.createRange()
+  r.setEnd(endNode || node, end)
+  r.setStart(node, start)
+  return r
+} }
+else { range = function(node, start, end) {
+  var r = document.body.createTextRange()
+  try { r.moveToElementText(node.parentNode) }
+  catch(e) { return r }
+  r.collapse(true)
+  r.moveEnd("character", end)
+  r.moveStart("character", start)
+  return r
+} }
+
+function contains(parent, child) {
+  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+    { child = child.parentNode }
+  if (parent.contains)
+    { return parent.contains(child) }
+  do {
+    if (child.nodeType == 11) { child = child.host }
+    if (child == parent) { return true }
+  } while (child = child.parentNode)
+}
+
+function activeElt() {
+  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+  // IE < 10 will throw when accessed while the page is loading or in an iframe.
+  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+  var activeElement
+  try {
+    activeElement = document.activeElement
+  } catch(e) {
+    activeElement = document.body || null
+  }
+  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+    { activeElement = activeElement.shadowRoot.activeElement }
+  return activeElement
+}
+
+function addClass(node, cls) {
+  var current = node.className
+  if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls }
+}
+function joinClasses(a, b) {
+  var as = a.split(" ")
+  for (var i = 0; i < as.length; i++)
+    { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i] } }
+  return b
+}
+
+var selectInput = function(node) { node.select() }
+if (ios) // Mobile Safari apparently has a bug where select() is broken.
+  { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length } }
+else if (ie) // Suppress mysterious IE10 errors
+  { selectInput = function(node) { try { node.select() } catch(_e) {} } }
+
+function bind(f) {
+  var args = Array.prototype.slice.call(arguments, 1)
+  return function(){return f.apply(null, args)}
+}
+
+function copyObj(obj, target, overwrite) {
+  if (!target) { target = {} }
+  for (var prop in obj)
+    { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+      { target[prop] = obj[prop] } }
+  return target
+}
+
+// Counts the column offset in a string, taking tabs into account.
+// Used mostly to find indentation.
+function countColumn(string, end, tabSize, startIndex, startValue) {
+  if (end == null) {
+    end = string.search(/[^\s\u00a0]/)
+    if (end == -1) { end = string.length }
+  }
+  for (var i = startIndex || 0, n = startValue || 0;;) {
+    var nextTab = string.indexOf("\t", i)
+    if (nextTab < 0 || nextTab >= end)
+      { return n + (end - i) }
+    n += nextTab - i
+    n += tabSize - (n % tabSize)
+    i = nextTab + 1
+  }
+}
+
+var Delayed = function() {this.id = null};
+Delayed.prototype.set = function (ms, f) {
+  clearTimeout(this.id)
+  this.id = setTimeout(f, ms)
+};
+
+function indexOf(array, elt) {
+  for (var i = 0; i < array.length; ++i)
+    { if (array[i] == elt) { return i } }
+  return -1
+}
+
+// Number of pixels added to scroller and sizer to hide scrollbar
+var scrollerGap = 30
+
+// Returned or thrown by various protocols to signal 'I'm not
+// handling this'.
+var Pass = {toString: function(){return "CodeMirror.Pass"}}
+
+// Reused option objects for setSelection & friends
+var sel_dontScroll = {scroll: false};
+var sel_mouse = {origin: "*mouse"};
+var sel_move = {origin: "+move"};
+// The inverse of countColumn -- find the offset that corresponds to
+// a particular column.
+function findColumn(string, goal, tabSize) {
+  for (var pos = 0, col = 0;;) {
+    var nextTab = string.indexOf("\t", pos)
+    if (nextTab == -1) { nextTab = string.length }
+    var skipped = nextTab - pos
+    if (nextTab == string.length || col + skipped >= goal)
+      { return pos + Math.min(skipped, goal - col) }
+    col += nextTab - pos
+    col += tabSize - (col % tabSize)
+    pos = nextTab + 1
+    if (col >= goal) { return pos }
+  }
+}
+
+var spaceStrs = [""]
+function spaceStr(n) {
+  while (spaceStrs.length <= n)
+    { spaceStrs.push(lst(spaceStrs) + " ") }
+  return spaceStrs[n]
+}
+
+function lst(arr) { return arr[arr.length-1] }
+
+function map(array, f) {
+  var out = []
+  for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i) }
+  return out
+}
+
+function insertSorted(array, value, score) {
+  var pos = 0, priority = score(value)
+  while (pos < array.length && score(array[pos]) <= priority) { pos++ }
+  array.splice(pos, 0, value)
+}
+
+function nothing() {}
+
+function createObj(base, props) {
+  var inst
+  if (Object.create) {
+    inst = Object.create(base)
+  } else {
+    nothing.prototype = base
+    inst = new nothing()
+  }
+  if (props) { copyObj(props, inst) }
+  return inst
+}
+
+var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/
+function isWordCharBasic(ch) {
+  return /\w/.test(ch) || ch > "\x80" &&
+    (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+}
+function isWordChar(ch, helper) {
+  if (!helper) { return isWordCharBasic(ch) }
+  if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+  return helper.test(ch)
+}
+
+function isEmpty(obj) {
+  for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+  return true
+}
+
+// Extending unicode characters. A series of a non-extending char +
+// any number of extending chars is treated as a single unit as far
+// as editing and measuring is concerned. This is not fully correct,
+// since some scripts/fonts/browsers also treat other configurations
+// of code points as a group.
+var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/
+function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+function skipExtendingChars(str, pos, dir) {
+  while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir }
+  return pos
+}
+
+// Returns the value from the range [`from`; `to`] that satisfies
+// `pred` and is closest to `from`. Assumes that at least `to` satisfies `pred`.
+function findFirst(pred, from, to) {
+  for (;;) {
+    if (Math.abs(from - to) <= 1) { return pred(from) ? from : to }
+    var mid = Math.floor((from + to) / 2)
+    if (pred(mid)) { to = mid }
+    else { from = mid }
+  }
+}
+
+// The display handles the DOM integration, both for input reading
+// and content drawing. It holds references to DOM nodes and
+// display-related state.
+
+function Display(place, doc, input) {
+  var d = this
+  this.input = input
+
+  // Covers bottom-right square when both scrollbars are present.
+  d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
+  d.scrollbarFiller.setAttribute("cm-not-content", "true")
+  // Covers bottom of gutter when coverGutterNextToScrollbar is on
+  // and h scrollbar is present.
+  d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
+  d.gutterFiller.setAttribute("cm-not-content", "true")
+  // Will contain the actual code, positioned to cover the viewport.
+  d.lineDiv = eltP("div", null, "CodeMirror-code")
+  // Elements are added to these to represent selection and cursors.
+  d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
+  d.cursorDiv = elt("div", null, "CodeMirror-cursors")
+  // A visibility: hidden element used to find the size of things.
+  d.measure = elt("div", null, "CodeMirror-measure")
+  // When lines outside of the viewport are measured, they are drawn in this.
+  d.lineMeasure = elt("div", null, "CodeMirror-measure")
+  // Wraps everything that needs to exist inside the vertically-padded coordinate system
+  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                    null, "position: relative; outline: none")
+  var lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
+  // Moved around its parent to cover visible view.
+  d.mover = elt("div", [lines], null, "position: relative")
+  // Set to the height of the document, allowing scrolling.
+  d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
+  d.sizerWidth = null
+  // Behavior of elts with overflow: auto and padding is
+  // inconsistent across browsers. This is used to ensure the
+  // scrollable area is big enough.
+  d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
+  // Will contain the gutters, if any.
+  d.gutters = elt("div", null, "CodeMirror-gutters")
+  d.lineGutter = null
+  // Actual scrollable element.
+  d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
+  d.scroller.setAttribute("tabIndex", "-1")
+  // The element in which the editor lives.
+  d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")
+
+  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+  if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
+  if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true }
+
+  if (place) {
+    if (place.appendChild) { place.appendChild(d.wrapper) }
+    else { place(d.wrapper) }
+  }
+
+  // Current rendered range (may be bigger than the view window).
+  d.viewFrom = d.viewTo = doc.first
+  d.reportedViewFrom = d.reportedViewTo = doc.first
+  // Information about the rendered lines.
+  d.view = []
+  d.renderedView = null
+  // Holds info about a single rendered line when it was rendered
+  // for measurement, while not in view.
+  d.externalMeasured = null
+  // Empty space (in pixels) above the view
+  d.viewOffset = 0
+  d.lastWrapHeight = d.lastWrapWidth = 0
+  d.updateLineNumbers = null
+
+  d.nativeBarWidth = d.barHeight = d.barWidth = 0
+  d.scrollbarsClipped = false
+
+  // Used to only resize the line number gutter when necessary (when
+  // the amount of lines crosses a boundary that makes its width change)
+  d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
+  // Set to true when a non-horizontal-scrolling line widget is
+  // added. As an optimization, line widget aligning is skipped when
+  // this is false.
+  d.alignWidgets = false
+
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+
+  // Tracks the maximum line length so that the horizontal scrollbar
+  // can be kept static when scrolling.
+  d.maxLine = null
+  d.maxLineLength = 0
+  d.maxLineChanged = false
+
+  // Used for measuring wheel scrolling granularity
+  d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null
+
+  // True when shift is held down.
+  d.shift = false
+
+  // Used to track whether anything happened since the context menu
+  // was opened.
+  d.selForContextMenu = null
+
+  d.activeTouch = null
+
+  input.init(d)
+}
+
+// Find the line object corresponding to the given line number.
+function getLine(doc, n) {
+  n -= doc.first
+  if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+  var chunk = doc
+  while (!chunk.lines) {
+    for (var i = 0;; ++i) {
+      var child = chunk.children[i], sz = child.chunkSize()
+      if (n < sz) { chunk = child; break }
+      n -= sz
+    }
+  }
+  return chunk.lines[n]
+}
+
+// Get the part of a document between two positions, as an array of
+// strings.
+function getBetween(doc, start, end) {
+  var out = [], n = start.line
+  doc.iter(start.line, end.line + 1, function (line) {
+    var text = line.text
+    if (n == end.line) { text = text.slice(0, end.ch) }
+    if (n == start.line) { text = text.slice(start.ch) }
+    out.push(text)
+    ++n
+  })
+  return out
+}
+// Get the lines between from and to, as array of strings.
+function getLines(doc, from, to) {
+  var out = []
+  doc.iter(from, to, function (line) { out.push(line.text) }) // iter aborts when callback returns truthy value
+  return out
+}
+
+// Update the height of a line, propagating the height change
+// upwards to parent nodes.
+function updateLineHeight(line, height) {
+  var diff = height - line.height
+  if (diff) { for (var n = line; n; n = n.parent) { n.height += diff } }
+}
+
+// Given a line object, find its line number by walking up through
+// its parent links.
+function lineNo(line) {
+  if (line.parent == null) { return null }
+  var cur = line.parent, no = indexOf(cur.lines, line)
+  for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+    for (var i = 0;; ++i) {
+      if (chunk.children[i] == cur) { break }
+      no += chunk.children[i].chunkSize()
+    }
+  }
+  return no + cur.first
+}
+
+// Find the line at the given vertical position, using the height
+// information in the document tree.
+function lineAtHeight(chunk, h) {
+  var n = chunk.first
+  outer: do {
+    for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+      var child = chunk.children[i$1], ch = child.height
+      if (h < ch) { chunk = child; continue outer }
+      h -= ch
+      n += child.chunkSize()
+    }
+    return n
+  } while (!chunk.lines)
+  var i = 0
+  for (; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i], lh = line.height
+    if (h < lh) { break }
+    h -= lh
+  }
+  return n + i
+}
+
+function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+function lineNumberFor(options, i) {
+  return String(options.lineNumberFormatter(i + options.firstLineNumber))
+}
+
+// A Pos instance represents a position within the text.
+function Pos(line, ch, sticky) {
+  if ( sticky === void 0 ) sticky = null;
+
+  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+  this.line = line
+  this.ch = ch
+  this.sticky = sticky
+}
+
+// Compare two positions, return 0 if they are the same, a negative
+// number when a is less, and a positive number otherwise.
+function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+function copyPos(x) {return Pos(x.line, x.ch)}
+function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+// Most of the external API clips given positions to make sure they
+// actually exist within the document.
+function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+function clipPos(doc, pos) {
+  if (pos.line < doc.first) { return Pos(doc.first, 0) }
+  var last = doc.first + doc.size - 1
+  if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+  return clipToLen(pos, getLine(doc, pos.line).text.length)
+}
+function clipToLen(pos, linelen) {
+  var ch = pos.ch
+  if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+  else if (ch < 0) { return Pos(pos.line, 0) }
+  else { return pos }
+}
+function clipPosArray(doc, array) {
+  var out = []
+  for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]) }
+  return out
+}
+
+// Optimize some code when these features are not used.
+var sawReadOnlySpans = false;
+var sawCollapsedSpans = false;
+function seeReadOnlySpans() {
+  sawReadOnlySpans = true
+}
+
+function seeCollapsedSpans() {
+  sawCollapsedSpans = true
+}
+
+// TEXTMARKER SPANS
+
+function MarkedSpan(marker, from, to) {
+  this.marker = marker
+  this.from = from; this.to = to
+}
+
+// Search an array of spans for a span matching the given marker.
+function getMarkedSpanFor(spans, marker) {
+  if (spans) { for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i]
+    if (span.marker == marker) { return span }
+  } }
+}
+// Remove a span from an array, returning undefined if no spans are
+// left (we don't store arrays for lines without spans).
+function removeMarkedSpan(spans, span) {
+  var r
+  for (var i = 0; i < spans.length; ++i)
+    { if (spans[i] != span) { (r || (r = [])).push(spans[i]) } }
+  return r
+}
+// Add a span to a line.
+function addMarkedSpan(line, span) {
+  line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]
+  span.marker.attachLine(line)
+}
+
+// Used for the algorithm that adjusts markers for a change in the
+// document. These functions cut an array of spans at a given
+// character position, returning an array of remaining chunks (or
+// undefined if nothing remains).
+function markedSpansBefore(old, startCh, isInsert) {
+  var nw
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker
+    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh)
+    if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
+      ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to))
+    }
+  } }
+  return nw
+}
+function markedSpansAfter(old, endCh, isInsert) {
+  var nw
+  if (old) { for (var i = 0; i < old.length; ++i) {
+    var span = old[i], marker = span.marker
+    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh)
+    if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
+      ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                            span.to == null ? null : span.to - endCh))
+    }
+  } }
+  return nw
+}
+
+// Given a change object, compute the new set of marker spans that
+// cover the line in which the change took place. Removes spans
+// entirely within the change, reconnects spans belonging to the
+// same marker that appear on both sides of the change, and cuts off
+// spans partially within the change. Returns an array of span
+// arrays with one element for each line in (after) the change.
+function stretchSpansOverChange(doc, change) {
+  if (change.full) { return null }
+  var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans
+  var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans
+  if (!oldFirst && !oldLast) { return null }
+
+  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0
+  // Get the spans that 'stick out' on both sides
+  var first = markedSpansBefore(oldFirst, startCh, isInsert)
+  var last = markedSpansAfter(oldLast, endCh, isInsert)
+
+  // Next, merge those two ends
+  var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0)
+  if (first) {
+    // Fix up .to properties of first
+    for (var i = 0; i < first.length; ++i) {
+      var span = first[i]
+      if (span.to == null) {
+        var found = getMarkedSpanFor(last, span.marker)
+        if (!found) { span.to = startCh }
+        else if (sameLine) { span.to = found.to == null ? null : found.to + offset }
       }
-    });
-  }
-
-  // Make sure the gutters options contains the element
-  // "CodeMirror-linenumbers" when the lineNumbers option is true.
-  function setGuttersForLineNumbers(options) {
-    var found = indexOf(options.gutters, "CodeMirror-linenumbers");
-    if (found == -1 && options.lineNumbers) {
-      options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
-    } else if (found > -1 && !options.lineNumbers) {
-      options.gutters = options.gutters.slice(0);
-      options.gutters.splice(found, 1);
-    }
-  }
-
-  // SCROLLBARS
-
-  // Prepare DOM reads needed to update the scrollbars. Done in one
-  // shot to minimize update/measure roundtrips.
-  function measureForScrollbars(cm) {
-    var d = cm.display, gutterW = d.gutters.offsetWidth;
-    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
-    return {
-      clientHeight: d.scroller.clientHeight,
-      viewHeight: d.wrapper.clientHeight,
-      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
-      viewWidth: d.wrapper.clientWidth,
-      barLeft: cm.options.fixedGutter ? gutterW : 0,
-      docHeight: docH,
-      scrollHeight: docH + scrollGap(cm) + d.barHeight,
-      nativeBarWidth: d.nativeBarWidth,
-      gutterWidth: gutterW
-    };
-  }
-
-  function NativeScrollbars(place, scroll, cm) {
-    this.cm = cm;
-    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
-    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
-    place(vert); place(horiz);
-
-    on(vert, "scroll", function() {
-      if (vert.clientHeight) scroll(vert.scrollTop, "vertical");
-    });
-    on(horiz, "scroll", function() {
-      if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal");
-    });
-
-    this.checkedZeroWidth = false;
-    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
-    if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px";
-  }
-
-  NativeScrollbars.prototype = copyObj({
-    update: function(measure) {
-      var needsH = measure.scrollWidth > measure.clientWidth + 1;
-      var needsV = measure.scrollHeight > measure.clientHeight + 1;
-      var sWidth = measure.nativeBarWidth;
-
-      if (needsV) {
-        this.vert.style.display = "block";
-        this.vert.style.bottom = needsH ? sWidth + "px" : "0";
-        var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
-        // A bug in IE8 can cause this value to be negative, so guard it.
-        this.vert.firstChild.style.height =
-          Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
+    }
+  }
+  if (last) {
+    // Fix up .from in last (or move them into first in case of sameLine)
+    for (var i$1 = 0; i$1 < last.length; ++i$1) {
+      var span$1 = last[i$1]
+      if (span$1.to != null) { span$1.to += offset }
+      if (span$1.from == null) {
+        var found$1 = getMarkedSpanFor(first, span$1.marker)
+        if (!found$1) {
+          span$1.from = offset
+          if (sameLine) { (first || (first = [])).push(span$1) }
+        }
       } else {
-        this.vert.style.display = "";
-        this.vert.firstChild.style.height = "0";
-      }
-
-      if (needsH) {
-        this.horiz.style.display = "block";
-        this.horiz.style.right = needsV ? sWidth + "px" : "0";
-        this.horiz.style.left = measure.barLeft + "px";
-        var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
-        this.horiz.firstChild.style.width =
-          (measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
-      } else {
-        this.horiz.style.display = "";
-        this.horiz.firstChild.style.width = "0";
-      }
-
-      if (!this.checkedZeroWidth && measure.clientHeight > 0) {
-        if (sWidth == 0) this.zeroWidthHack();
-        this.checkedZeroWidth = true;
-      }
-
-      return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0};
-    },
-    setScrollLeft: function(pos) {
-      if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos;
-      if (this.disableHoriz) this.enableZeroWidthBar(this.horiz, this.disableHoriz);
-    },
-    setScrollTop: function(pos) {
-      if (this.vert.scrollTop != pos) this.vert.scrollTop = pos;
-      if (this.disableVert) this.enableZeroWidthBar(this.vert, this.disableVert);
-    },
-    zeroWidthHack: function() {
-      var w = mac && !mac_geMountainLion ? "12px" : "18px";
-      this.horiz.style.height = this.vert.style.width = w;
-      this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
-      this.disableHoriz = new Delayed;
-      this.disableVert = new Delayed;
-    },
-    enableZeroWidthBar: function(bar, delay) {
-      bar.style.pointerEvents = "auto";
-      function maybeDisable() {
-        // To find out whether the scrollbar is still visible, we
-        // check whether the element under the pixel in the bottom
-        // left corner of the scrollbar box is the scrollbar box
-        // itself (when the bar is still visible) or its filler child
-        // (when the bar is hidden). If it is still visible, we keep
-        // it enabled, if it's hidden, we disable pointer events.
-        var box = bar.getBoundingClientRect();
-        var elt = document.elementFromPoint(box.left + 1, box.bottom - 1);
-        if (elt != bar) bar.style.pointerEvents = "none";
-        else delay.set(1000, maybeDisable);
+        span$1.from += offset
+        if (sameLine) { (first || (first = [])).push(span$1) }
       }
-      delay.set(1000, maybeDisable);
-    },
-    clear: function() {
-      var parent = this.horiz.parentNode;
-      parent.removeChild(this.horiz);
-      parent.removeChild(this.vert);
-    }
-  }, NativeScrollbars.prototype);
-
-  function NullScrollbars() {}
-
-  NullScrollbars.prototype = copyObj({
-    update: function() { return {bottom: 0, right: 0}; },
-    setScrollLeft: function() {},
-    setScrollTop: function() {},
-    clear: function() {}
-  }, NullScrollbars.prototype);
-
-  CodeMirror.scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
-
-  function initScrollbars(cm) {
-    if (cm.display.scrollbars) {
-      cm.display.scrollbars.clear();
-      if (cm.display.scrollbars.addClass)
-        rmClass(cm.display.wrapper, cm.display.scrollbars.addClass);
-    }
-
-    cm.display.scrollbars = new CodeMirror.scrollbarModel[cm.options.scrollbarStyle](function(node) {
-      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
-      // Prevent clicks in the scrollbars from killing focus
-      on(node, "mousedown", function() {
-        if (cm.state.focused) setTimeout(function() { cm.display.input.focus(); }, 0);
-      });
-      node.setAttribute("cm-not-content", "true");
-    }, function(pos, axis) {
-      if (axis == "horizontal") setScrollLeft(cm, pos);
-      else setScrollTop(cm, pos);
-    }, cm);
-    if (cm.display.scrollbars.addClass)
-      addClass(cm.display.wrapper, cm.display.scrollbars.addClass);
-  }
-
-  function updateScrollbars(cm, measure) {
-    if (!measure) measure = measureForScrollbars(cm);
-    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
-    updateScrollbarsInner(cm, measure);
-    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
-      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
-        updateHeightsInViewport(cm);
-      updateScrollbarsInner(cm, measureForScrollbars(cm));
-      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
-    }
-  }
-
-  // Re-synchronize the fake scrollbars with the actual size of the
-  // content.
-  function updateScrollbarsInner(cm, measure) {
-    var d = cm.display;
-    var sizes = d.scrollbars.update(measure);
-
-    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
-    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
-    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
-
-    if (sizes.right && sizes.bottom) {
-      d.scrollbarFiller.style.display = "block";
-      d.scrollbarFiller.style.height = sizes.bottom + "px";
-      d.scrollbarFiller.style.width = sizes.right + "px";
-    } else d.scrollbarFiller.style.display = "";
-    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
-      d.gutterFiller.style.display = "block";
-      d.gutterFiller.style.height = sizes.bottom + "px";
-      d.gutterFiller.style.width = measure.gutterWidth + "px";
-    } else d.gutterFiller.style.display = "";
-  }
-
-  // Compute the lines that are visible in a given viewport (defaults
-  // the the current scroll position). viewport may contain top,
-  // height, and ensure (see op.scrollToPos) properties.
-  function visibleLines(display, doc, viewport) {
-    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
-    top = Math.floor(top - paddingTop(display));
-    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
-
-    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
-    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
-    // forces those lines into the viewport (if possible).
-    if (viewport && viewport.ensure) {
-      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
-      if (ensureFrom < from) {
-        from = ensureFrom;
-        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
-      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
-        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
-        to = ensureTo;
+    }
+  }
+  // Make sure we didn't create any zero-length spans
+  if (first) { first = clearEmptySpans(first) }
+  if (last && last != first) { last = clearEmptySpans(last) }
+
+  var newMarkers = [first]
+  if (!sameLine) {
+    // Fill gap with whole-line-spans
+    var gap = change.text.length - 2, gapMarkers
+    if (gap > 0 && first)
+      { for (var i$2 = 0; i$2 < first.length; ++i$2)
+        { if (first[i$2].to == null)
+          { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)) } } }
+    for (var i$3 = 0; i$3 < gap; ++i$3)
+      { newMarkers.push(gapMarkers) }
+    newMarkers.push(last)
+  }
+  return newMarkers
+}
+
+// Remove spans that are empty and don't have a clearWhenEmpty
+// option of false.
+function clearEmptySpans(spans) {
+  for (var i = 0; i < spans.length; ++i) {
+    var span = spans[i]
+    if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+      { spans.splice(i--, 1) }
+  }
+  if (!spans.length) { return null }
+  return spans
+}
+
+// Used to 'clip' out readOnly ranges when making a change.
+function removeReadOnlyRanges(doc, from, to) {
+  var markers = null
+  doc.iter(from.line, to.line + 1, function (line) {
+    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+      var mark = line.markedSpans[i].marker
+      if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+        { (markers || (markers = [])).push(mark) }
+    } }
+  })
+  if (!markers) { return null }
+  var parts = [{from: from, to: to}]
+  for (var i = 0; i < markers.length; ++i) {
+    var mk = markers[i], m = mk.find(0)
+    for (var j = 0; j < parts.length; ++j) {
+      var p = parts[j]
+      if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+      var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to)
+      if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+        { newParts.push({from: p.from, to: m.from}) }
+      if (dto > 0 || !mk.inclusiveRight && !dto)
+        { newParts.push({from: m.to, to: p.to}) }
+      parts.splice.apply(parts, newParts)
+      j += newParts.length - 3
+    }
+  }
+  return parts
+}
+
+// Connect or disconnect spans from a line.
+function detachMarkedSpans(line) {
+  var spans = line.markedSpans
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.detachLine(line) }
+  line.markedSpans = null
+}
+function attachMarkedSpans(line, spans) {
+  if (!spans) { return }
+  for (var i = 0; i < spans.length; ++i)
+    { spans[i].marker.attachLine(line) }
+  line.markedSpans = spans
+}
+
+// Helpers used when computing which overlapping collapsed span
+// counts as the larger one.
+function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+// Returns a number indicating which of two overlapping collapsed
+// spans is larger (and thus includes the other). Falls back to
+// comparing ids when the spans cover exactly the same range.
+function compareCollapsedMarkers(a, b) {
+  var lenDiff = a.lines.length - b.lines.length
+  if (lenDiff != 0) { return lenDiff }
+  var aPos = a.find(), bPos = b.find()
+  var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b)
+  if (fromCmp) { return -fromCmp }
+  var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b)
+  if (toCmp) { return toCmp }
+  return b.id - a.id
+}
+
+// Find out whether a line ends or starts in a collapsed span. If
+// so, return the marker for that span.
+function collapsedSpanAtSide(line, start) {
+  var sps = sawCollapsedSpans && line.markedSpans, found
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i]
+    if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+        (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+      { found = sp.marker }
+  } }
+  return found
+}
+function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+// Test whether there exists a collapsed span that partially
+// overlaps (covers the start or end, but not both) of a new span.
+// Such overlap is not allowed.
+function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+  var line = getLine(doc, lineNo)
+  var sps = sawCollapsedSpans && line.markedSpans
+  if (sps) { for (var i = 0; i < sps.length; ++i) {
+    var sp = sps[i]
+    if (!sp.marker.collapsed) { continue }
+    var found = sp.marker.find(0)
+    var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker)
+    var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker)
+    if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+    if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+        fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+      { return true }
+  } }
+}
+
+// A visual line is a line as drawn on the screen. Folding, for
+// example, can cause multiple logical lines to appear on the same
+// visual line. This finds the start of the visual line that the
+// given line is part of (usually that is the line itself).
+function visualLine(line) {
+  var merged
+  while (merged = collapsedSpanAtStart(line))
+    { line = merged.find(-1, true).line }
+  return line
+}
+
+function visualLineEnd(line) {
+  var merged
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line }
+  return line
+}
+
+// Returns an array of logical lines that continue the visual line
+// started by the argument, or undefined if there are no such lines.
+function visualLineContinued(line) {
+  var merged, lines
+  while (merged = collapsedSpanAtEnd(line)) {
+    line = merged.find(1, true).line
+    ;(lines || (lines = [])).push(line)
+  }
+  return lines
+}
+
+// Get the line number of the start of the visual line that the
+// given line number is part of.
+function visualLineNo(doc, lineN) {
+  var line = getLine(doc, lineN), vis = visualLine(line)
+  if (line == vis) { return lineN }
+  return lineNo(vis)
+}
+
+// Get the line number of the start of the next visual line after
+// the given line.
+function visualLineEndNo(doc, lineN) {
+  if (lineN > doc.lastLine()) { return lineN }
+  var line = getLine(doc, lineN), merged
+  if (!lineIsHidden(doc, line)) { return lineN }
+  while (merged = collapsedSpanAtEnd(line))
+    { line = merged.find(1, true).line }
+  return lineNo(line) + 1
+}
+
+// Compute whether a line is hidden. Lines count as hidden when they
+// are part of a visual line that starts with another line, or when
+// they are entirely covered by collapsed, non-widget span.
+function lineIsHidden(doc, line) {
+  var sps = sawCollapsedSpans && line.markedSpans
+  if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+    sp = sps[i]
+    if (!sp.marker.collapsed) { continue }
+    if (sp.from == null) { return true }
+    if (sp.marker.widgetNode) { continue }
+    if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+      { return true }
+  } }
+}
+function lineIsHiddenInner(doc, line, span) {
+  if (span.to == null) {
+    var end = span.marker.find(1, true)
+    return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+  }
+  if (span.marker.inclusiveRight && span.to == line.text.length)
+    { return true }
+  for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+    sp = line.markedSpans[i]
+    if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+        (sp.to == null || sp.to != span.from) &&
+        (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+        lineIsHiddenInner(doc, line, sp)) { return true }
+  }
+}
+
+// Find the height above the given line.
+function heightAtLine(lineObj) {
+  lineObj = visualLine(lineObj)
+
+  var h = 0, chunk = lineObj.parent
+  for (var i = 0; i < chunk.lines.length; ++i) {
+    var line = chunk.lines[i]
+    if (line == lineObj) { break }
+    else { h += line.height }
+  }
+  for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+    for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+      var cur = p.children[i$1]
+      if (cur == chunk) { break }
+      else { h += cur.height }
+    }
+  }
+  return h
+}
+
+// Compute the character length of a line, taking into account
+// collapsed ranges (see markText) that might hide parts, and join
+// other lines onto it.
+function lineLength(line) {
+  if (line.height == 0) { return 0 }
+  var len = line.text.length, merged, cur = line
+  while (merged = collapsedSpanAtStart(cur)) {
+    var found = merged.find(0, true)
+    cur = found.from.line
+    len += found.from.ch - found.to.ch
+  }
+  cur = line
+  while (merged = collapsedSpanAtEnd(cur)) {
+    var found$1 = merged.find(0, true)
+    len -= cur.text.length - found$1.from.ch
+    cur = found$1.to.line
+    len += cur.text.length - found$1.to.ch
+  }
+  return len
+}
+
+// Find the longest line in the document.
+function findMaxLine(cm) {
+  var d = cm.display, doc = cm.doc
+  d.maxLine = getLine(doc, doc.first)
+  d.maxLineLength = lineLength(d.maxLine)
+  d.maxLineChanged = true
+  doc.iter(function (line) {
+    var len = lineLength(line)
+    if (len > d.maxLineLength) {
+      d.maxLineLength = len
+      d.maxLine = line
+    }
+  })
+}
+
+// BIDI HELPERS
+
+function iterateBidiSections(order, from, to, f) {
+  if (!order) { return f(from, to, "ltr") }
+  var found = false
+  for (var i = 0; i < order.length; ++i) {
+    var part = order[i]
+    if (part.from < to && part.to > from || from == to && part.to == from) {
+      f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr")
+      found = true
+    }
+  }
+  if (!found) { f(from, to, "ltr") }
+}
+
+var bidiOther = null
+function getBidiPartAt(order, ch, sticky) {
+  var found
+  bidiOther = null
+  for (var i = 0; i < order.length; ++i) {
+    var cur = order[i]
+    if (cur.from < ch && cur.to > ch) { return i }
+    if (cur.to == ch) {
+      if (cur.from != cur.to && sticky == "before") { found = i }
+      else { bidiOther = i }
+    }
+    if (cur.from == ch) {
+      if (cur.from != cur.to && sticky != "before") { found = i }
+      else { bidiOther = i }
+    }
+  }
+  return found != null ? found : bidiOther
+}
+
+// Bidirectional ordering algorithm
+// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+// that this (partially) implements.
+
+// One-char codes used for character types:
+// L (L):   Left-to-Right
+// R (R):   Right-to-Left
+// r (AL):  Right-to-Left Arabic
+// 1 (EN):  European Number
+// + (ES):  European Number Separator
+// % (ET):  European Number Terminator
+// n (AN):  Arabic Number
+// , (CS):  Common Number Separator
+// m (NSM): Non-Spacing Mark
+// b (BN):  Boundary Neutral
+// s (B):   Paragraph Separator
+// t (S):   Segment Separator
+// w (WS):  Whitespace
+// N (ON):  Other Neutrals
+
+// Returns null if characters are ordered as they appear
+// (left-to-right), or an array of sections ({from, to, level}
+// objects) in the order in which they occur visually.
+var bidiOrdering = (function() {
+  // Character types for codepoints 0 to 0xff
+  var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"
+  // Character types for codepoints 0x600 to 0x6f9
+  var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111"
+  function charType(code) {
+    if (code <= 0xf7) { return lowTypes.charAt(code) }
+    else if (0x590 <= code && code <= 0x5f4) { return "R" }
+    else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+    else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+    else if (0x2000 <= code && code <= 0x200b) { return "w" }
+    else if (code == 0x200c) { return "b" }
+    else { return "L" }
+  }
+
+  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/
+  var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/
+
+  function BidiSpan(level, from, to) {
+    this.level = level
+    this.from = from; this.to = to
+  }
+
+  return function(str, direction) {
+    var outerType = direction == "ltr" ? "L" : "R"
+
+    if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+    var len = str.length, types = []
+    for (var i = 0; i < len; ++i)
+      { types.push(charType(str.charCodeAt(i))) }
+
+    // W1. Examine each non-spacing mark (NSM) in the level run, and
+    // change the type of the NSM to the type of the previous
+    // character. If the NSM is at the start of the level run, it will
+    // get the type of sor.
+    for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+      var type = types[i$1]
+      if (type == "m") { types[i$1] = prev }
+      else { prev = type }
+    }
+
+    // W2. Search backwards from each instance of a European number
+    // until the first strong type (R, L, AL, or sor) is found. If an
+    // AL is found, change the type of the European number to Arabic
+    // number.
+    // W3. Change all ALs to R.
+    for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+      var type$1 = types[i$2]
+      if (type$1 == "1" && cur == "r") { types[i$2] = "n" }
+      else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R" } }
+    }
+
+    // W4. A single European separator between two European numbers
+    // changes to a European number. A single common separator between
+    // two numbers of the same type changes to that type.
+    for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+      var type$2 = types[i$3]
+      if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1" }
+      else if (type$2 == "," && prev$1 == types[i$3+1] &&
+               (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1 }
+      prev$1 = type$2
+    }
+
+    // W5. A sequence of European terminators adjacent to European
+    // numbers changes to all European numbers.
+    // W6. Otherwise, separators and terminators change to Other
+    // Neutral.
+    for (var i$4 = 0; i$4 < len; ++i$4) {
+      var type$3 = types[i$4]
+      if (type$3 == ",") { types[i$4] = "N" }
+      else if (type$3 == "%") {
+        var end = (void 0)
+        for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+        var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"
+        for (var j = i$4; j < end; ++j) { types[j] = replace }
+        i$4 = end - 1
       }
     }
-    return {from: from, to: Math.max(to, from + 1)};
-  }
-
-  // LINE NUMBERS
-
-  // Re-align line numbers and gutter marks to compensate for
-  // horizontal scrolling.
-  function alignHorizontally(cm) {
-    var display = cm.display, view = display.view;
-    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
-    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
-    var gutterW = display.gutters.offsetWidth, left = comp + "px";
-    for (var i = 0; i < view.length; i++) if (!view[i].hidden) {
-      if (cm.options.fixedGutter && view[i].gutter)
-        view[i].gutter.style.left = left;
-      var align = view[i].alignable;
-      if (align) for (var j = 0; j < align.length; j++)
-        align[j].style.left = left;
-    }
-    if (cm.options.fixedGutter)
-      display.gutters.style.left = (comp + gutterW) + "px";
-  }
-
-  // Used to ensure that the line number gutter is still the right
-  // size for the current document size. Returns true when an update
-  // is needed.
-  function maybeUpdateLineNumberWidth(cm) {
-    if (!cm.options.lineNumbers) return false;
-    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
-    if (last.length != display.lineNumChars) {
-      var test = display.measure.appendChild(elt("div", [elt("div", last)],
-                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
-      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
-      display.lineGutter.style.width = "";
-      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
-      display.lineNumWidth = display.lineNumInnerWidth + padding;
-      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
-      display.lineGutter.style.width = display.lineNumWidth + "px";
-      updateGutterSpace(cm);
-      return true;
-    }
-    return false;
-  }
-
-  function lineNumberFor(options, i) {
-    return String(options.lineNumberFormatter(i + options.firstLineNumber));
-  }
-
-  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
-  // but using getBoundingClientRect to get a sub-pixel-accurate
-  // result.
-  function compensateForHScroll(display) {
-    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;
-  }
-
-  // DISPLAY DRAWING
-
-  function DisplayUpdate(cm, viewport, force) {
-    var display = cm.display;
-
-    this.viewport = viewport;
-    // Store some values that we'll need later (but don't want to force a relayout for)
-    this.visible = visibleLines(display, cm.doc, viewport);
-    this.editorIsHidden = !display.wrapper.offsetWidth;
-    this.wrapperHeight = display.wrapper.clientHeight;
-    this.wrapperWidth = display.wrapper.clientWidth;
-    this.oldDisplayWidth = displayWidth(cm);
-    this.force = force;
-    this.dims = getDimensions(cm);
-    this.events = [];
-  }
-
-  DisplayUpdate.prototype.signal = function(emitter, type) {
-    if (hasHandler(emitter, type))
-      this.events.push(arguments);
-  };
-  DisplayUpdate.prototype.finish = function() {
-    for (var i = 0; i < this.events.length; i++)
-      signal.apply(null, this.events[i]);
-  };
-
-  function maybeClipScrollbars(cm) {
-    var display = cm.display;
-    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
-      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
-      display.heightForcer.style.height = scrollGap(cm) + "px";
-      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
-      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
-      display.scrollbarsClipped = true;
-    }
-  }
-
-  // Does the actual updating of the line display. Bails out
-  // (returning false) when there is nothing to be done and forced is
-  // false.
-  function updateDisplayIfNeeded(cm, update) {
-    var display = cm.display, doc = cm.doc;
-
-    if (update.editorIsHidden) {
-      resetView(cm);
-      return false;
-    }
-
-    // Bail out if the visible area is already rendered and nothing changed.
-    if (!update.force &&
-        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
-        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
-        display.renderedView == display.view && countDirtyView(cm) == 0)
-      return false;
-
-    if (maybeUpdateLineNumberWidth(cm)) {
-      resetView(cm);
-      update.dims = getDimensions(cm);
-    }
-
-    // Compute a suitable new viewport (from & to)
-    var end = doc.first + doc.size;
-    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
-    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
-    if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom);
-    if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo);
-    if (sawCollapsedSpans) {
-      from = visualLineNo(cm.doc, from);
-      to = visualLineEndNo(cm.doc, to);
-    }
-
-    var different = from != display.viewFrom || to != display.viewTo ||
-      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
-    adjustView(cm, from, to);
-
-    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
-    // Position the mover div to align with the current scroll position
-    cm.display.mover.style.top = display.viewOffset + "px";
-
-    var toUpdate = countDirtyView(cm);
-    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
-        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
-      return false;
-
-    // For big changes, we hide the enclosing element during the
-    // update, since that speeds up the operations on most browsers.
-    var focused = activeElt();
-    if (toUpdate > 4) display.lineDiv.style.display = "none";
-    patchDisplay(cm, display.updateLineNumbers, update.dims);
-    if (toUpdate > 4) display.lineDiv.style.display = "";
-    display.renderedView = display.view;
-    // There might have been a widget with a focused element that got
-    // hidden or updated, if so re-focus it.
-    if (focused && activeElt() != focused && focused.offsetHeight) focused.focus();
-
-    // Prevent selection and cursors from interfering with the scroll
-    // width and height.
-    removeChildren(display.cursorDiv);
-    removeChildren(display.selectionDiv);
-    display.gutters.style.height = display.sizer.style.minHeight = 0;
-
-    if (different) {
-      display.lastWrapHeight = update.wrapperHeight;
-      display.lastWrapWidth = update.wrapperWidth;
-      startWorker(cm, 400);
-    }
-
-    display.updateLineNumbers = null;
-
-    return true;
-  }
-
-  function postUpdateDisplay(cm, update) {
-    var viewport = update.viewport;
-
-    for (var first = true;; first = false) {
-      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
-        // Clip forced viewport to actual scrollable area.
-        if (viewport && viewport.top != null)
-          viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)};
-        // Updated line heights might result in the drawn area not
-        // actually covering the viewport. Keep looping until it does.
-        update.visible = visibleLines(cm.display, cm.doc, viewport);
-        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
-          break;
+
+    // W7. Search backwards from each instance of a European number
+    // until the first strong type (R, L, or sor) is found. If an L is
+    // found, then change the type of the European number to L.
+    for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+      var type$4 = types[i$5]
+      if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L" }
+      else if (isStrong.test(type$4)) { cur$1 = type$4 }
+    }
+
+    // N1. A sequence of neutrals takes the direction of the
+    // surrounding strong text if the text on both sides has the same
+    // direction. European and Arabic numbers act as if they were R in
+    // terms of their influence on neutrals. Start-of-level-run (sor)
+    // and end-of-level-run (eor) are used at level run boundaries.
+    // N2. Any remaining neutrals take the embedding direction.
+    for (var i$6 = 0; i$6 < len; ++i$6) {
+      if (isNeutral.test(types[i$6])) {
+        var end$1 = (void 0)
+        for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+        var before = (i$6 ? types[i$6-1] : outerType) == "L"
+        var after = (end$1 < len ? types[end$1] : outerType) == "L"
+        var replace$1 = before == after ? (before ? "L" : "R") : outerType
+        for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1 }
+        i$6 = end$1 - 1
+      }
+    }
+
+    // Here we depart from the documented algorithm, in order to avoid
+    // building up an actual levels array. Since there are only three
+    // levels (0, 1, 2) in an implementation that doesn't take
+    // explicit embedding into account, we can build up the order on
+    // the fly, without following the level-based algorithm.
+    var order = [], m
+    for (var i$7 = 0; i$7 < len;) {
+      if (countsAsLeft.test(types[i$7])) {
+        var start = i$7
+        for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+        order.push(new BidiSpan(0, start, i$7))
+      } else {
+        var pos = i$7, at = order.length
+        for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+        for (var j$2 = pos; j$2 < i$7;) {
+          if (countsAsNum.test(types[j$2])) {
+            if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)) }
+            var nstart = j$2
+            for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+            order.splice(at, 0, new BidiSpan(2, nstart, j$2))
+            pos = j$2
+          } else { ++j$2 }
+        }
+        if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)) }
       }
-      if (!updateDisplayIfNeeded(cm, update)) break;
-      updateHeightsInViewport(cm);
-      var barMeasure = measureForScrollbars(cm);
-      updateSelection(cm);
-      updateScrollbars(cm, barMeasure);
-      setDocumentHeight(cm, barMeasure);
-    }
-
-    update.signal(cm, "update", cm);
-    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
-      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
-      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
-    }
-  }
-
-  function updateDisplaySimple(cm, viewport) {
-    var update = new DisplayUpdate(cm, viewport);
-    if (updateDisplayIfNeeded(cm, update)) {
-      updateHeightsInViewport(cm);
-      postUpdateDisplay(cm, update);
-      var barMeasure = measureForScrollbars(cm);
-      updateSelection(cm);
-      updateScrollbars(cm, barMeasure);
-      setDocumentHeight(cm, barMeasure);
-      update.finish();
-    }
-  }
-
-  function setDocumentHeight(cm, measure) {
-    cm.display.sizer.style.minHeight = measure.docHeight + "px";
-    cm.display.heightForcer.style.top = measure.docHeight + "px";
-    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
-  }
-
-  // Read the actual heights of the rendered lines, and update their
-  // stored heights to match.
-  function updateHeightsInViewport(cm) {
-    var display = cm.display;
-    var prevBottom = display.lineDiv.offsetTop;
-    for (var i = 0; i < display.view.length; i++) {
-      var cur = display.view[i], height;
-      if (cur.hidden) continue;
-      if (ie && ie_version < 8) {
-        var bot = cur.node.offsetTop + cur.node.offsetHeight;
-        height = bot - prevBottom;
-        prevBottom = bot;
-      } else {
-        var box = cur.node.getBoundingClientRect();
-        height = box.bottom - box.top;
-      }
-      var diff = cur.line.height - height;
-      if (height < 2) height = textHeight(display);
-      if (diff > .001 || diff < -.001) {
-        updateLineHeight(cur.line, height);
-        updateWidgetHeight(cur.line);
-        if (cur.rest) for (var j = 0; j < cur.rest.length; j++)
-          updateWidgetHeight(cur.rest[j]);
-      }
-    }
-  }
-
-  // Read and store the height of line widgets associated with the
-  // given line.
-  function updateWidgetHeight(line) {
-    if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
-      line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight;
-  }
-
-  // Do a bulk-read of the DOM positions and sizes needed to draw the
-  // view, so that we don't interleave reading and writing to the DOM.
-  function getDimensions(cm) {
-    var d = cm.display, left = {}, width = {};
-    var gutterLeft = d.gutters.clientLeft;
-    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
-      left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
-      width[cm.options.gutters[i]] = n.clientWidth;
-    }
-    return {fixedPos: compensateForHScroll(d),
-            gutterTotalWidth: d.gutters.offsetWidth,
-            gutterLeft: left,
-            gutterWidth: width,
-            wrapperWidth: d.wrapper.clientWidth};
-  }
-
-  // Sync the actual display DOM structure with display.view, removing
-  // nodes for lines that are no longer in view, and creating the ones
-  // that are not there yet, and updating the ones that are out of
-  // date.
-  function patchDisplay(cm, updateNumbersFrom, dims) {
-    var display = cm.display, lineNumbers = cm.options.lineNumbers;
-    var container = display.lineDiv, cur = container.firstChild;
-
-    function rm(node) {
-      var next = node.nextSibling;
-      // Works around a throw-scroll bug in OS X Webkit
-      if (webkit && mac && cm.display.currentWheelTarget == node)
-        node.style.display = "none";
-      else
-        node.parentNode.removeChild(node);
-      return next;
-    }
-
-    var view = display.view, lineN = display.viewFrom;
-    // Loop over the elements in the view, syncing cur (the DOM nodes
-    // in display.lineDiv) with the view as we go.
-    for (var i = 0; i < view.length; i++) {
-      var lineView = view[i];
-      if (lineView.hidden) {
-      } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
-        var node = buildLineElement(cm, lineView, lineN, dims);
-        container.insertBefore(node, cur);
-      } else { // Already drawn
-        while (cur != lineView.node) cur = rm(cur);
-        var updateNumber = lineNumbers && updateNumbersFrom != null &&
-          updateNumbersFrom <= lineN && lineView.lineNumber;
-        if (lineView.changes) {
-          if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false;
-          updateLineForChanges(cm, lineView, lineN, dims);
-        }
-        if (updateNumber) {
-          removeChildren(lineView.lineNumber);
-          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
-        }
-        cur = lineView.node.nextSibling;
+    }
+    if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+      order[0].from = m[0].length
+      order.unshift(new BidiSpan(0, 0, m[0].length))
+    }
+    if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+      lst(order).to -= m[0].length
+      order.push(new BidiSpan(0, len - m[0].length, len))
+    }
+
+    return direction == "rtl" ? order.reverse() : order
+  }
+})()
+
+// Get the bidi ordering for the given line (and cache it). Returns
+// false for lines that are fully left-to-right, and an array of
+// BidiSpan objects otherwise.
+function getOrder(line, direction) {
+  var order = line.order
+  if (order == null) { order = line.order = bidiOrdering(line.text, direction) }
+  return order
+}
+
+function moveCharLogically(line, ch, dir) {
+  var target = skipExtendingChars(line.text, ch + dir, dir)
+  return target < 0 || target > line.text.length ? null : target
+}
+
+function moveLogically(line, start, dir) {
+  var ch = moveCharLogically(line, start.ch, dir)
+  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+}
+
+function endOfLine(visually, cm, lineObj, lineNo, dir) {
+  if (visually) {
+    var order = getOrder(lineObj, cm.doc.direction)
+    if (order) {
+      var part = dir < 0 ? lst(order) : order[0]
+      var moveInStorageOrder = (dir < 0) == (part.level == 1)
+      var sticky = moveInStorageOrder ? "after" : "before"
+      var ch
+      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+      // it could be that the last bidi part is not on the last visual line,
+      // since visual lines contain content order-consecutive chunks.
+      // Thus, in rtl, we are looking for the first (content-order) character
+      // in the rtl chunk that is on the last line (that is, the same line
+      // as the last (content-order) character).
+      if (part.level > 0) {
+        var prep = prepareMeasureForLine(cm, lineObj)
+        ch = dir < 0 ? lineObj.text.length - 1 : 0
+        var targetTop = measureCharPrepared(cm, prep, ch).top
+        ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch)
+        if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1) }
+      } else { ch = dir < 0 ? part.to : part.from }
+      return new Pos(lineNo, ch, sticky)
+    }
+  }
+  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+}
+
+function moveVisually(cm, line, start, dir) {
+  var bidi = getOrder(line, cm.doc.direction)
+  if (!bidi) { return moveLogically(line, start, dir) }
+  if (start.ch >= line.text.length) {
+    start.ch = line.text.length
+    start.sticky = "before"
+  } else if (start.ch <= 0) {
+    start.ch = 0
+    start.sticky = "after"
+  }
+  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos]
+  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+    // nothing interesting happens.
+    return moveLogically(line, start, dir)
+  }
+
+  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); }
+  var prep
+  var getWrappedLineExtent = function (ch) {
+    if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+    prep = prep || prepareMeasureForLine(cm, line)
+    return wrappedLineExtentChar(cm, line, prep, ch)
+  }
+  var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch)
+
+  if (cm.doc.direction == "rtl" || part.level == 1) {
+    var moveInStorageOrder = (part.level == 1) == (dir < 0)
+    var ch = mv(start, moveInStorageOrder ? 1 : -1)
+    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+      var sticky = moveInStorageOrder ? "before" : "after"
+      return new Pos(start.line, ch, sticky)
+    }
+  }
+
+  // Case 3: Could not move within this bidi part in this visual line, so leave
+  // the current bidi part
+
+  var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+    var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+      ? new Pos(start.line, mv(ch, 1), "before")
+      : new Pos(start.line, ch, "after"); }
+
+    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+      var part = bidi[partPos]
+      var moveInStorageOrder = (dir > 0) == (part.level != 1)
+      var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1)
+      if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+      ch = moveInStorageOrder ? part.from : mv(part.to, -1)
+      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+    }
+  }
+
+  // Case 3a: Look for other bidi parts on the same visual line
+  var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent)
+  if (res) { return res }
+
+  // Case 3b: Look for other bidi parts on the next visual line
+  var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1)
+  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh))
+    if (res) { return res }
+  }
+
+  // Case 4: Nowhere to move
+  return null
+}
+
+// EVENT HANDLING
+
+// Lightweight event framework. on/off also work on DOM nodes,
+// registering native DOM handlers.
+
+var noHandlers = []
+
+var on = function(emitter, type, f) {
+  if (emitter.addEventListener) {
+    emitter.addEventListener(type, f, false)
+  } else if (emitter.attachEvent) {
+    emitter.attachEvent("on" + type, f)
+  } else {
+    var map = emitter._handlers || (emitter._handlers = {})
+    map[type] = (map[type] || noHandlers).concat(f)
+  }
+}
+
+function getHandlers(emitter, type) {
+  return emitter._handlers && emitter._handlers[type] || noHandlers
+}
+
+function off(emitter, type, f) {
+  if (emitter.removeEventListener) {
+    emitter.removeEventListener(type, f, false)
+  } else if (emitter.detachEvent) {
+    emitter.detachEvent("on" + type, f)
+  } else {
+    var map = emitter._handlers, arr = map && map[type]
+    if (arr) {
+      var index = indexOf(arr, f)
+      if (index > -1)
+        { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)) }
+    }
+  }
+}
+
+function signal(emitter, type /*, values...*/) {
+  var handlers = getHandlers(emitter, type)
+  if (!handlers.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2)
+  for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args) }
+}
+
+// The DOM events that CodeMirror handles can be overridden by
+// registering a (non-DOM) handler on the editor for the event name,
+// and preventDefault-ing the event in that handler.
+function signalDOMEvent(cm, e, override) {
+  if (typeof e == "string")
+    { e = {type: e, preventDefault: function() { this.defaultPrevented = true }} }
+  signal(cm, override || e.type, cm, e)
+  return e_defaultPrevented(e) || e.codemirrorIgnore
+}
+
+function signalCursorActivity(cm) {
+  var arr = cm._handlers && cm._handlers.cursorActivity
+  if (!arr) { return }
+  var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = [])
+  for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+    { set.push(arr[i]) } }
+}
+
+function hasHandler(emitter, type) {
+  return getHandlers(emitter, type).length > 0
+}
+
+// Add on and off methods to a constructor's prototype, to make
+// registering events on such objects more convenient.
+function eventMixin(ctor) {
+  ctor.prototype.on = function(type, f) {on(this, type, f)}
+  ctor.prototype.off = function(type, f) {off(this, type, f)}
+}
+
+// Due to the fact that we still support jurassic IE versions, some
+// compatibility wrappers are needed.
+
+function e_preventDefault(e) {
+  if (e.preventDefault) { e.preventDefault() }
+  else { e.returnValue = false }
+}
+function e_stopPropagation(e) {
+  if (e.stopPropagation) { e.stopPropagation() }
+  else { e.cancelBubble = true }
+}
+function e_defaultPrevented(e) {
+  return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+}
+function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)}
+
+function e_target(e) {return e.target || e.srcElement}
+function e_button(e) {
+  var b = e.which
+  if (b == null) {
+    if (e.button & 1) { b = 1 }
+    else if (e.button & 2) { b = 3 }
+    else if (e.button & 4) { b = 2 }
+  }
+  if (mac && e.ctrlKey && b == 1) { b = 3 }
+  return b
+}
+
+// Detect drag-and-drop
+var dragAndDrop = function() {
+  // There is *some* kind of drag-and-drop support in IE6-8, but I
+  // couldn't get it to work yet.
+  if (ie && ie_version < 9) { return false }
+  var div = elt('div')
+  return "draggable" in div || "dragDrop" in div
+}()
+
+var zwspSupported
+function zeroWidthElement(measure) {
+  if (zwspSupported == null) {
+    var test = elt("span", "\u200b")
+    removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
+    if (measure.firstChild.offsetHeight != 0)
+      { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8) }
+  }
+  var node = zwspSupported ? elt("span", "\u200b") :
+    elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
+  node.setAttribute("cm-text", "")
+  return node
+}
+
+// Feature-detect IE's crummy client rect reporting for bidi text
+var badBidiRects
+function hasBadBidiRects(measure) {
+  if (badBidiRects != null) { return badBidiRects }
+  var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
+  var r0 = range(txt, 0, 1).getBoundingClientRect()
+  var r1 = range(txt, 1, 2).getBoundingClientRect()
+  removeChildren(measure)
+  if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+  return badBidiRects = (r1.right - r0.right < 3)
+}
+
+// See if "".split is the broken IE version, if so, provide an
+// alternative way to split lines.
+var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+  var pos = 0, result = [], l = string.length
+  while (pos <= l) {
+    var nl = string.indexOf("\n", pos)
+    if (nl == -1) { nl = string.length }
+    var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
+    var rt = line.indexOf("\r")
+    if (rt != -1) {
+      result.push(line.slice(0, rt))
+      pos += rt + 1
+    } else {
+      result.push(line)
+      pos = nl + 1
+    }
+  }
+  return result
+} : function (string) { return string.split(/\r\n?|\n/); }
+
+var hasSelection = window.getSelection ? function (te) {
+  try { return te.selectionStart != te.selectionEnd }
+  catch(e) { return false }
+} : function (te) {
+  var range
+  try {range = te.ownerDocument.selection.createRange()}
+  catch(e) {}
+  if (!range || range.parentElement() != te) { return false }
+  return range.compareEndPoints("StartToEnd", range) != 0
+}
+
+var hasCopyEvent = (function () {
+  var e = elt("div")
+  if ("oncopy" in e) { return true }
+  e.setAttribute("oncopy", "return;")
+  return typeof e.oncopy == "function"
+})()
+
+var badZoomedRects = null
+function hasBadZoomedRects(measure) {
+  if (badZoomedRects != null) { return badZoomedRects }
+  var node = removeChildrenAndAdd(measure, elt("span", "x"))
+  var normal = node.getBoundingClientRect()
+  var fromRange = range(node, 0, 1).getBoundingClientRect()
+  return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+}
+
+var modes = {};
+var mimeModes = {};
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+function defineMode(name, mode) {
+  if (arguments.length > 2)
+    { mode.dependencies = Array.prototype.slice.call(arguments, 2) }
+  modes[name] = mode
+}
+
+function defineMIME(mime, spec) {
+  mimeModes[mime] = spec
+}
+
+// Given a MIME type, a {name, ...options} config object, or a name
+// string, return a mode config object.
+function resolveMode(spec) {
+  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+    spec = mimeModes[spec]
+  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+    var found = mimeModes[spec.name]
+    if (typeof found == "string") { found = {name: found} }
+    spec = createObj(found, spec)
+    spec.name = found.name
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+    return resolveMode("application/xml")
+  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+    return resolveMode("application/json")
+  }
+  if (typeof spec == "string") { return {name: spec} }
+  else { return spec || {name: "null"} }
+}
+
+// Given a mode spec (anything that resolveMode accepts), find and
+// initialize an actual mode object.
+function getMode(options, spec) {
+  spec = resolveMode(spec)
+  var mfactory = modes[spec.name]
+  if (!mfactory) { return getMode(options, "text/plain") }
+  var modeObj = mfactory(options, spec)
+  if (modeExtensions.hasOwnProperty(spec.name)) {
+    var exts = modeExtensions[spec.name]
+    for (var prop in exts) {
+      if (!exts.hasOwnProperty(prop)) { continue }
+      if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop] }
+      modeObj[prop] = exts[prop]
+    }
+  }
+  modeObj.name = spec.name
+  if (spec.helperType) { modeObj.helperType = spec.helperType }
+  if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+    { modeObj[prop$1] = spec.modeProps[prop$1] } }
+
+  return modeObj
+}
+
+// This can be used to attach properties to mode objects from
+// outside the actual mode definition.
+var modeExtensions = {}
+function extendMode(mode, properties) {
+  var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
+  copyObj(properties, exts)
+}
+
+function copyState(mode, state) {
+  if (state === true) { return state }
+  if (mode.copyState) { return mode.copyState(state) }
+  var nstate = {}
+  for (var n in state) {
+    var val = state[n]
+    if (val instanceof Array) { val = val.concat([]) }
+    nstate[n] = val
+  }
+  return nstate
+}
+
+// Given a mode and a state (for that mode), find the inner mode and
+// state at the position that the state refers to.
+function innerMode(mode, state) {
+  var info
+  while (mode.innerMode) {
+    info = mode.innerMode(state)
+    if (!info || info.mode == mode) { break }
+    state = info.state
+    mode = info.mode
+  }
+  return info || {mode: mode, state: state}
+}
+
+function startState(mode, a1, a2) {
+  return mode.startState ? mode.startState(a1, a2) : true
+}
+
+// STRING STREAM
+
+// Fed to the mode parsers, provides helper functions to make
+// parsers more succinct.
+
+var StringStream = function(string, tabSize, lineOracle) {
+  this.pos = this.start = 0
+  this.string = string
+  this.tabSize = tabSize || 8
+  this.lastColumnPos = this.lastColumnValue = 0
+  this.lineStart = 0
+  this.lineOracle = lineOracle
+};
+
+StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+StringStream.prototype.next = function () {
+  if (this.pos < this.string.length)
+    { return this.string.charAt(this.pos++) }
+};
+StringStream.prototype.eat = function (match) {
+  var ch = this.string.charAt(this.pos)
+  var ok
+  if (typeof match == "string") { ok = ch == match }
+  else { ok = ch && (match.test ? match.test(ch) : match(ch)) }
+  if (ok) {++this.pos; return ch}
+};
+StringStream.prototype.eatWhile = function (match) {
+  var start = this.pos
+  while (this.eat(match)){}
+  return this.pos > start
+};
+StringStream.prototype.eatSpace = function () {
+    var this$1 = this;
+
+  var start = this.pos
+  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos }
+  return this.pos > start
+};
+StringStream.prototype.skipToEnd = function () {this.pos = this.string.length};
+StringStream.prototype.skipTo = function (ch) {
+  var found = this.string.indexOf(ch, this.pos)
+  if (found > -1) {this.pos = found; return true}
+};
+StringStream.prototype.backUp = function (n) {this.pos -= n};
+StringStream.prototype.column = function () {
+  if (this.lastColumnPos < this.start) {
+    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)
+    this.lastColumnPos = this.start
+  }
+  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.indentation = function () {
+  return countColumn(this.string, null, this.tabSize) -
+    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+};
+StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+  if (typeof pattern == "string") {
+    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; }
+    var substr = this.string.substr(this.pos, pattern.length)
+    if (cased(substr) == cased(pattern)) {
+      if (consume !== false) { this.pos += pattern.length }
+      return true
+    }
+  } else {
+    var match = this.string.slice(this.pos).match(pattern)
+    if (match && match.index > 0) { return null }
+    if (match && consume !== false) { this.pos += match[0].length }
+    return match
+  }
+};
+StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+StringStream.prototype.hideFirstChars = function (n, inner) {
+  this.lineStart += n
+  try { return inner() }
+  finally { this.lineStart -= n }
+};
+StringStream.prototype.lookAhead = function (n) {
+  var oracle = this.lineOracle
+  return oracle && oracle.lookAhead(n)
+};
+
+var SavedContext = function(state, lookAhead) {
+  this.state = state
+  this.lookAhead = lookAhead
+};
+
+var Context = function(doc, state, line, lookAhead) {
+  this.state = state
+  this.doc = doc
+  this.line = line
+  this.maxLookAhead = lookAhead || 0
+};
+
+Context.prototype.lookAhead = function (n) {
+  var line = this.doc.getLine(this.line + n)
+  if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n }
+  return line
+};
+
+Context.prototype.nextLine = function () {
+  this.line++
+  if (this.maxLookAhead > 0) { this.maxLookAhead-- }
+};
+
+Context.fromSaved = function (doc, saved, line) {
+  if (saved instanceof SavedContext)
+    { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+  else
+    { return new Context(doc, copyState(doc.mode, saved), line) }
+};
+
+Context.prototype.save = function (copy) {
+  var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state
+  return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+};
+
+
+// Compute a style array (an array starting with a mode generation
+// -- for invalidation -- followed by pairs of end positions and
+// style strings), which is used to highlight the tokens on the
+// line.
+function highlightLine(cm, line, context, forceToEnd) {
+  // A styles array always starts with a number identifying the
+  // mode/overlays that it is based on (for easy invalidation).
+  var st = [cm.state.modeGen], lineClasses = {}
+  // Compute the base array of styles
+  runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+          lineClasses, forceToEnd)
+  var state = context.state
+
+  // Run overlays, adjust style array.
+  var loop = function ( o ) {
+    var overlay = cm.state.overlays[o], i = 1, at = 0
+    context.state = true
+    runMode(cm, line.text, overlay.mode, context, function (end, style) {
+      var start = i
+      // Ensure there's a token end at the current position, and that i points at it
+      while (at < end) {
+        var i_end = st[i]
+        if (i_end > end)
+          { st.splice(i, 1, end, st[i+1], i_end) }
+        i += 2
+        at = Math.min(end, i_end)
       }
-      lineN += lineView.size;
-    }
-    while (cur) cur = rm(cur);
-  }
-
-  // When an aspect of a line changes, a string is added to
-  // lineView.changes. This updates the relevant part of the line's
-  // DOM structure.
-  function updateLineForChanges(cm, lineView, lineN, dims) {
-    for (var j = 0; j < lineView.changes.length; j++) {
-      var type = lineView.changes[j];
-      if (type == "text") updateLineText(cm, lineView);
-      else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims);
-      else if (type == "class") updateLineClasses(lineView);
-      else if (type == "widget") updateLineWidgets(cm, lineView, dims);
-    }
-    lineView.changes = null;
-  }
-
-  // Lines with gutter elements, widgets or a background class need to
-  // be wrapped, and have the extra elements added to the wrapper div
-  function ensureLineWrapped(lineView) {
-    if (lineView.node == lineView.text) {
-      lineView.node = elt("div", null, null, "position: relative");
-      if (lineView.text.parentNode)
-        lineView.text.parentNode.replaceChild(lineView.node, lineView.text);
-      lineView.node.appendChild(lineView.text);
-      if (ie && ie_version < 8) lineView.node.style.zIndex = 2;
-    }
-    return lineView.node;
-  }
-
-  function updateLineBackground(lineView) {
-    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
-    if (cls) cls += " CodeMirror-linebackground";
-    if (lineView.background) {
-      if (cls) lineView.background.className = cls;
-      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
-    } else if (cls) {
-      var wrap = ensureLineWrapped(lineView);
-      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
-    }
-  }
-
-  // Wrapper around buildLineContent which will reuse the structure
-  // in display.externalMeasured when possible.
-  function getLineContent(cm, lineView) {
-    var ext = cm.display.externalMeasured;
-    if (ext && ext.line == lineView.line) {
-      cm.display.externalMeasured = null;
-      lineView.measure = ext.measure;
-      return ext.built;
-    }
-    return buildLineContent(cm, lineView);
-  }
-
-  // Redraw the line's text. Interacts with the background and text
-  // classes because the mode may output tokens that influence these
-  // classes.
-  function updateLineText(cm, lineView) {
-    var cls = lineView.text.className;
-    var built = getLineContent(cm, lineView);
-    if (lineView.text == lineView.node) lineView.node = built.pre;
-    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
-    lineView.text = built.pre;
-    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
-      lineView.bgClass = built.bgClass;
-      lineView.textClass = built.textClass;
-      updateLineClasses(lineView);
-    } else if (cls) {
-      lineView.text.className = cls;
-    }
-  }
-
-  function updateLineClasses(lineView) {
-    updateLineBackground(lineView);
-    if (lineView.line.wrapClass)
-      ensureLineWrapped(lineView).className = lineView.line.wrapClass;
-    else if (lineView.node != lineView.text)
-      lineView.node.className = "";
-    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
-    lineView.text.className = textClass || "";
-  }
-
-  function updateLineGutter(cm, lineView, lineN, dims) {
-    if (lineView.gutter) {
-      lineView.node.removeChild(lineView.gutter);
-      lineView.gutter = null;
-    }
-    if (lineView.gutterBackground) {
-      lineView.node.removeChild(lineView.gutterBackground);
-      lineView.gutterBackground = null;
-    }
-    if (lineView.line.gutterClass) {
-      var wrap = ensureLineWrapped(lineView);
-      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
-                                      "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
-                                      "px; width: " + dims.gutterTotalWidth + "px");
-      wrap.insertBefore(lineView.gutterBackground, lineView.text);
-    }
-    var markers = lineView.line.gutterMarkers;
-    if (cm.options.lineNumbers || markers) {
-      var wrap = ensureLineWrapped(lineView);
-      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", "left: " +
-                                             (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px");
-      cm.display.input.setUneditable(gutterWrap);
-      wrap.insertBefore(gutterWrap, lineView.text);
-      if (lineView.line.gutterClass)
-        gutterWrap.className += " " + lineView.line.gutterClass;
-      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
-        lineView.lineNumber = gutterWrap.appendChild(
-          elt("div", lineNumberFor(cm.options, lineN),
-              "CodeMirror-linenumber CodeMirror-gutter-elt",
-              "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
-              + cm.display.lineNumInnerWidth + "px"));
-      if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) {
-        var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
-        if (found)
-          gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
-                                     dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
+      if (!style) { return }
+      if (overlay.opaque) {
+        st.splice(start, i - start, end, "overlay " + style)
+        i = start + 2
+      } else {
+        for (; start < i; start += 2) {
+          var cur = st[start+1]
+          st[start+1] = (cur ? cur + " " : "") + "overlay " + style
+        }
+      }
+    }, lineClasses)
+  };
+
+  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+  context.state = state
+
+  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+}
+
+function getLineStyles(cm, line, updateFrontier) {
+  if (!line.styles || line.styles[0] != cm.state.modeGen) {
+    var context = getContextBefore(cm, lineNo(line))
+    var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state)
+    var result = highlightLine(cm, line, context)
+    if (resetState) { context.state = resetState }
+    line.stateAfter = context.save(!resetState)
+    line.styles = result.styles
+    if (result.classes) { line.styleClasses = result.classes }
+    else if (line.styleClasses) { line.styleClasses = null }
+    if (updateFrontier === cm.doc.highlightFrontier)
+      { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier) }
+  }
+  return line.styles
+}
+
+function getContextBefore(cm, n, precise) {
+  var doc = cm.doc, display = cm.display
+  if (!doc.mode.startState) { return new Context(doc, true, n) }
+  var start = findStartLine(cm, n, precise)
+  var saved = start > doc.first && getLine(doc, start - 1).stateAfter
+  var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start)
+
+  doc.iter(start, n, function (line) {
+    processLine(cm, line.text, context)
+    var pos = context.line
+    line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null
+    context.nextLine()
+  })
+  if (precise) { doc.modeFrontier = context.line }
+  return context
+}
+
+// Lightweight form of highlight -- proceed over this line and
+// update state, but don't save a style array. Used for lines that
+// aren't currently visible.
+function processLine(cm, text, context, startAt) {
+  var mode = cm.doc.mode
+  var stream = new StringStream(text, cm.options.tabSize, context)
+  stream.start = stream.pos = startAt || 0
+  if (text == "") { callBlankLine(mode, context.state) }
+  while (!stream.eol()) {
+    readToken(mode, stream, context.state)
+    stream.start = stream.pos
+  }
+}
+
+function callBlankLine(mode, state) {
+  if (mode.blankLine) { return mode.blankLine(state) }
+  if (!mode.innerMode) { return }
+  var inner = innerMode(mode, state)
+  if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+}
+
+function readToken(mode, stream, state, inner) {
+  for (var i = 0; i < 10; i++) {
+    if (inner) { inner[0] = innerMode(mode, state).mode }
+    var style = mode.token(stream, state)
+    if (stream.pos > stream.start) { return style }
+  }
+  throw new Error("Mode " + mode.name + " failed to advance stream.")
+}
+
+var Token = function(stream, type, state) {
+  this.start = stream.start; this.end = stream.pos
+  this.string = stream.current()
+  this.type = type || null
+  this.state = state
+};
+
+// Utility for getTokenAt and getLineTokens
+function takeToken(cm, pos, precise, asArray) {
+  var doc = cm.doc, mode = doc.mode, style
+  pos = clipPos(doc, pos)
+  var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise)
+  var stream = new StringStream(line.text, cm.options.tabSize, context), tokens
+  if (asArray) { tokens = [] }
+  while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+    stream.start = stream.pos
+    style = readToken(mode, stream, context.state)
+    if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))) }
+  }
+  return asArray ? tokens : new Token(stream, style, context.state)
+}
+
+function extractLineClasses(type, output) {
+  if (type) { for (;;) {
+    var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/)
+    if (!lineClass) { break }
+    type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length)
+    var prop = lineClass[1] ? "bgClass" : "textClass"
+    if (output[prop] == null)
+      { output[prop] = lineClass[2] }
+    else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+      { output[prop] += " " + lineClass[2] }
+  } }
+  return type
+}
+
+// Run the given mode's parser over a line, calling f for each token.
+function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+  var flattenSpans = mode.flattenSpans
+  if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans }
+  var curStart = 0, curStyle = null
+  var stream = new StringStream(text, cm.options.tabSize, context), style
+  var inner = cm.options.addModeClass && [null]
+  if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses) }
+  while (!stream.eol()) {
+    if (stream.pos > cm.options.maxHighlightLength) {
+      flattenSpans = false
+      if (forceToEnd) { processLine(cm, text, context, stream.pos) }
+      stream.pos = text.length
+      style = null
+    } else {
+      style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses)
+    }
+    if (inner) {
+      var mName = inner[0].name
+      if (mName) { style = "m-" + (style ? mName + " " + style : mName) }
+    }
+    if (!flattenSpans || curStyle != style) {
+      while (curStart < stream.start) {
+        curStart = Math.min(stream.start, curStart + 5000)
+        f(curStart, curStyle)
       }
-    }
-  }
-
-  function updateLineWidgets(cm, lineView, dims) {
-    if (lineView.alignable) lineView.alignable = null;
-    for (var node = lineView.node.firstChild, next; node; node = next) {
-      var next = node.nextSibling;
-      if (node.className == "CodeMirror-linewidget")
-        lineView.node.removeChild(node);
-    }
-    insertLineWidgets(cm, lineView, dims);
-  }
-
-  // Build a line's DOM representation from scratch
-  function buildLineElement(cm, lineView, lineN, dims) {
-    var built = getLineContent(cm, lineView);
-    lineView.text = lineView.node = built.pre;
-    if (built.bgClass) lineView.bgClass = built.bgClass;
-    if (built.textClass) lineView.textClass = built.textClass;
-
-    updateLineClasses(lineView);
-    updateLineGutter(cm, lineView, lineN, dims);
-    insertLineWidgets(cm, lineView, dims);
-    return lineView.node;
-  }
-
-  // A lineView may contain multiple logical lines (when merged by
-  // collapsed spans). The widgets for all of them need to be drawn.
-  function insertLineWidgets(cm, lineView, dims) {
-    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
-    if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
-      insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false);
-  }
-
-  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
-    if (!line.widgets) return;
-    var wrap = ensureLineWrapped(lineView);
-    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
-      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
-      if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true");
-      positionLineWidget(widget, node, lineView, dims);
-      cm.display.input.setUneditable(node);
-      if (allowAbove && widget.above)
-        wrap.insertBefore(node, lineView.gutter || lineView.text);
-      else
-        wrap.appendChild(node);
-      signalLater(widget, "redraw");
-    }
-  }
-
-  function positionLineWidget(widget, node, lineView, dims) {
-    if (widget.noHScroll) {
-      (lineView.alignable || (lineView.alignable = [])).push(node);
-      var width = dims.wrapperWidth;
-      node.style.left = dims.fixedPos + "px";
-      if (!widget.coverGutter) {
-        width -= dims.gutterTotalWidth;
-        node.style.paddingLeft = dims.gutterTotalWidth + "px";
-      }
-      node.style.width = width + "px";
-    }
-    if (widget.coverGutter) {
-      node.style.zIndex = 5;
-      node.style.position = "relative";
-      if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
-    }
-  }
-
-  // POSITION OBJECT
-
-  // A Pos instance represents a position within the text.
-  var Pos = CodeMirror.Pos = function(line, ch) {
-    if (!(this instanceof Pos)) return new Pos(line, ch);
-    this.line = line; this.ch = ch;
-  };
-
-  // Compare two positions, return 0 if they are the same, a negative
-  // number when a is less, and a positive number otherwise.
-  var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; };
-
-  function copyPos(x) {return Pos(x.line, x.ch);}
-  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; }
-  function minPos(a, b) { return cmp(a, b) < 0 ? a : b; }
-
-  // INPUT HANDLING
-
-  function ensureFocus(cm) {
-    if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
-  }
-
-  // This will be set to a {lineWise: bool, text: [string]} object, so
-  // that, when pasting, we know what kind of selections the copied
-  // text was made out of.
-  var lastCopied = null;
-
-  function applyTextInput(cm, inserted, deleted, sel, origin) {
-    var doc = cm.doc;
-    cm.display.shift = false;
-    if (!sel) sel = doc.sel;
-
-    var paste = cm.state.pasteIncoming || origin == "paste";
-    var textLines = doc.splitLines(inserted), multiPaste = null
-    // When pasing N lines into N selections, insert one line per selection
-    if (paste && sel.ranges.length > 1) {
-      if (lastCopied && lastCopied.text.join("\n") == inserted) {
-        if (sel.ranges.length % lastCopied.text.length == 0) {
-          multiPaste = [];
-          for (var i = 0; i < lastCopied.text.length; i++)
-            multiPaste.push(doc.splitLines(lastCopied.text[i]));
-        }
-      } else if (textLines.length == sel.ranges.length) {
-        multiPaste = map(textLines, function(l) { return [l]; });
-      }
-    }
-
-    // Normal behavior is to insert the new text into every selection
-    for (var i = sel.ranges.length - 1; i >= 0; i--) {
-      var range = sel.ranges[i];
-      var from = range.from(), to = range.to();
-      if (range.empty()) {
-        if (deleted && deleted > 0) // Handle deletion
-          from = Pos(from.line, from.ch - deleted);
-        else if (cm.state.overwrite && !paste) // Handle overwrite
-          to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length));
-        else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
-          from = to = Pos(from.line, 0)
+      curStyle = style
+    }
+    stream.start = stream.pos
+  }
+  while (curStart < stream.pos) {
+    // Webkit seems to refuse to render text nodes longer than 57444
+    // characters, and returns inaccurate measurements in nodes
+    // starting around 5000 chars.
+    var pos = Math.min(stream.pos, curStart + 5000)
+    f(pos, curStyle)
+    curStart = pos
+  }
+}
+
+// Finds the line to start with when starting a parse. Tries to
+// find a line with a stateAfter, so that it can start with a
+// valid state. If that fails, it returns the line with the
+// smallest indentation, which tends to need the least context to
+// parse correctly.
+function findStartLine(cm, n, precise) {
+  var minindent, minline, doc = cm.doc
+  var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100)
+  for (var search = n; search > lim; --search) {
+    if (search <= doc.first) { return doc.first }
+    var line = getLine(doc, search - 1), after = line.stateAfter
+    if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+      { return search }
+    var indented = countColumn(line.text, null, cm.options.tabSize)
+    if (minline == null || minindent > indented) {
+      minline = search - 1
+      minindent = indented
+    }
+  }
+  return minline
+}
+
+function retreatFrontier(doc, n) {
+  doc.modeFrontier = Math.min(doc.modeFrontier, n)
+  if (doc.highlightFrontier < n - 10) { return }
+  var start = doc.first
+  for (var line = n - 1; line > start; line--) {
+    var saved = getLine(doc, line).stateAfter
+    // change is on 3
+    // state on line 1 looked ahead 2 -- so saw 3
+    // test 1 + 2 < 3 should cover this
+    if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+      start = line + 1
+      break
+    }
+  }
+  doc.highlightFrontier = Math.min(doc.highlightFrontier, start)
+}
+
+// LINE DATA STRUCTURE
+
+// Line objects. These hold state related to a line, including
+// highlighting info (the styles array).
+var Line = function(text, markedSpans, estimateHeight) {
+  this.text = text
+  attachMarkedSpans(this, markedSpans)
+  this.height = estimateHeight ? estimateHeight(this) : 1
+};
+
+Line.prototype.lineNo = function () { return lineNo(this) };
+eventMixin(Line)
+
+// Change the content (text, markers) of a line. Automatically
+// invalidates cached information and tries to re-estimate the
+// line's height.
+function updateLine(line, text, markedSpans, estimateHeight) {
+  line.text = text
+  if (line.stateAfter) { line.stateAfter = null }
+  if (line.styles) { line.styles = null }
+  if (line.order != null) { line.order = null }
+  detachMarkedSpans(line)
+  attachMarkedSpans(line, markedSpans)
+  var estHeight = estimateHeight ? estimateHeight(line) : 1
+  if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+}
+
+// Detach a line from the document tree and its markers.
+function cleanUpLine(line) {
+  line.parent = null
+  detachMarkedSpans(line)
+}
+
+// Convert a style as returned by a mode (either null, or a string
+// containing one or more styles) to a CSS style. This is cached,
+// and also looks for line-wide styles.
+var styleToClassCache = {};
+var styleToClassCacheWithMode = {};
+function interpretTokenStyle(style, options) {
+  if (!style || /^\s*$/.test(style)) { return null }
+  var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
+  return cache[style] ||
+    (cache[style] = style.replace(/\S+/g, "cm-$&"))
+}
+
+// Render the DOM representation of the text of a line. Also builds
+// up a 'line map', which points at the DOM nodes that represent
+// specific stretches of text, and is used by the measuring code.
+// The returned object contains the DOM node, this map, and
+// information about line-wide styles that were set by the mode.
+function buildLineContent(cm, lineView) {
+  // The padding-right forces the element to have a 'border', which
+  // is needed on Webkit to be able to get line-level bounding
+  // rectangles for it (in measureChar).
+  var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null)
+  var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+                 col: 0, pos: 0, cm: cm,
+                 trailingSpace: false,
+                 splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}
+  lineView.measure = {}
+
+  // Iterate over the logical lines that make up this visual line.
+  for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+    var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0)
+    builder.pos = 0
+    builder.addToken = buildToken
+    // Optionally wire in some hacks into the token-rendering
+    // algorithm, to deal with browser quirks.
+    if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+      { builder.addToken = buildTokenBadBidi(builder.addToken, order) }
+    builder.map = []
+    var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
+    insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
+    if (line.styleClasses) {
+      if (line.styleClasses.bgClass)
+        { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "") }
+      if (line.styleClasses.textClass)
+        { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "") }
+    }
+
+    // Ensure at least a single node is present, for measuring.
+    if (builder.map.length == 0)
+      { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))) }
+
+    // Store the map and a cache object for the current logical line
+    if (i == 0) {
+      lineView.measure.map = builder.map
+      lineView.measure.cache = {}
+    } else {
+      ;(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+      ;(lineView.measure.caches || (lineView.measure.caches = [])).push({})
+    }
+  }
+
+  // See issue #2901
+  if (webkit) {
+    var last = builder.content.lastChild
+    if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+      { builder.content.className = "cm-tab-wrap-hack" }
+  }
+
+  signal(cm, "renderLine", cm, lineView.line, builder.pre)
+  if (builder.pre.className)
+    { builder.textClass = joinClasses(builder.pre.className, builder.textClass || "") }
+
+  return builder
+}
+
+function defaultSpecialCharPlaceholder(ch) {
+  var token = elt("span", "\u2022", "cm-invalidchar")
+  token.title = "\\u" + ch.charCodeAt(0).toString(16)
+  token.setAttribute("aria-label", token.title)
+  return token
+}
+
+// Build up the DOM representation for a single token, and add it to
+// the line map. Takes care to render special characters separately.
+function buildToken(builder, text, style, startStyle, endStyle, title, css) {
+  if (!text) { return }
+  var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
+  var special = builder.cm.state.specialChars, mustWrap = false
+  var content
+  if (!special.test(text)) {
+    builder.col += text.length
+    content = document.createTextNode(displayText)
+    builder.map.push(builder.pos, builder.pos + text.length, content)
+    if (ie && ie_version < 9) { mustWrap = true }
+    builder.pos += text.length
+  } else {
+    content = document.createDocumentFragment()
+    var pos = 0
+    while (true) {
+      special.lastIndex = pos
+      var m = special.exec(text)
+      var skipped = m ? m.index - pos : text.length - pos
+      if (skipped) {
+        var txt = document.createTextNode(displayText.slice(pos, pos + skipped))
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])) }
+        else { content.appendChild(txt) }
+        builder.map.push(builder.pos, builder.pos + skipped, txt)
+        builder.col += skipped
+        builder.pos += skipped
       }
-      var updateInput = cm.curOp.updateInput;
-      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines,
-                         origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")};
-      makeChange(cm.doc, changeEvent);
-      signalLater(cm, "inputRead", cm, changeEvent);
-    }
-    if (inserted && !paste)
-      triggerElectric(cm, inserted);
-
-    ensureCursorVisible(cm);
-    cm.curOp.updateInput = updateInput;
-    cm.curOp.typing = true;
-    cm.state.pasteIncoming = cm.state.cutIncoming = false;
-  }
-
-  function handlePaste(e, cm) {
-    var pasted = e.clipboardData && e.clipboardData.getData("text/plain");
-    if (pasted) {
-      e.preventDefault();
-      if (!cm.isReadOnly() && !cm.options.disableInput)
-        runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); });
-      return true;
-    }
-  }
-
-  function triggerElectric(cm, inserted) {
-    // When an 'electric' character is inserted, immediately trigger a reindent
-    if (!cm.options.electricChars || !cm.options.smartIndent) return;
-    var sel = cm.doc.sel;
-
-    for (var i = sel.ranges.length - 1; i >= 0; i--) {
-      var range = sel.ranges[i];
-      if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) continue;
-      var mode = cm.getModeAt(range.head);
-      var indented = false;
-      if (mode.electricChars) {
-        for (var j = 0; j < mode.electricChars.length; j++)
-          if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
-            indented = indentLine(cm, range.head.line, "smart");
-            break;
-          }
-      } else if (mode.electricInput) {
-        if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
-          indented = indentLine(cm, range.head.line, "smart");
+      if (!m) { break }
+      pos += skipped + 1
+      var txt$1 = (void 0)
+      if (m[0] == "\t") {
+        var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
+        txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
+        txt$1.setAttribute("role", "presentation")
+        txt$1.setAttribute("cm-text", "\t")
+        builder.col += tabWidth
+      } else if (m[0] == "\r" || m[0] == "\n") {
+        txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
+        txt$1.setAttribute("cm-text", m[0])
+        builder.col += 1
+      } else {
+        txt$1 = builder.cm.options.specialCharPlaceholder(m[0])
+        txt$1.setAttribute("cm-text", m[0])
+        if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])) }
+        else { content.appendChild(txt$1) }
+        builder.col += 1
+      }
+      builder.map.push(builder.pos, builder.pos + 1, txt$1)
+      builder.pos++
+    }
+  }
+  builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
+  if (style || startStyle || endStyle || mustWrap || css) {
+    var fullStyle = style || ""
+    if (startStyle) { fullStyle += startStyle }
+    if (endStyle) { fullStyle += endStyle }
+    var token = elt("span", [content], fullStyle, css)
+    if (title) { token.title = title }
+    return builder.content.appendChild(token)
+  }
+  builder.content.appendChild(content)
+}
+
+function splitSpaces(text, trailingBefore) {
+  if (text.length > 1 && !/  /.test(text)) { return text }
+  var spaceBefore = trailingBefore, result = ""
+  for (var i = 0; i < text.length; i++) {
+    var ch = text.charAt(i)
+    if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+      { ch = "\u00a0" }
+    result += ch
+    spaceBefore = ch == " "
+  }
+  return result
+}
+
+// Work around nonsense dimensions being reported for stretches of
+// right-to-left text.
+function buildTokenBadBidi(inner, order) {
+  return function (builder, text, style, startStyle, endStyle, title, css) {
+    style = style ? style + " cm-force-border" : "cm-force-border"
+    var start = builder.pos, end = start + text.length
+    for (;;) {
+      // Find the part that overlaps with the start of this text
+      var part = (void 0)
+      for (var i = 0; i < order.length; i++) {
+        part = order[i]
+        if (part.to > start && part.from <= start) { break }
       }
-      if (indented) signalLater(cm, "electricInput", cm, range.head.line);
-    }
-  }
-
-  function copyableRanges(cm) {
-    var text = [], ranges = [];
-    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
-      var line = cm.doc.sel.ranges[i].head.line;
-      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
-      ranges.push(lineRange);
-      text.push(cm.getRange(lineRange.anchor, lineRange.head));
-    }
-    return {text: text, ranges: ranges};
-  }
-
-  function disableBrowserMagic(field) {
-    field.setAttribute("autocorrect", "off");
-    field.setAttribute("autocapitalize", "off");
-    field.setAttribute("spellcheck", "false");
-  }
-
-  // TEXTAREA INPUT STYLE
-
-  function TextareaInput(cm) {
-    this.cm = cm;
-    // See input.poll and input.reset
-    this.prevInput = "";
-
-    // Flag that indicates whether we expect input to appear real soon
-    // now (after some event like 'keypress' or 'input') and are
-    // polling intensively.
-    this.pollingFast = false;
-    // Self-resetting timeout for the poller
-    this.polling = new Delayed();
-    // Tracks when input.reset has punted to just putting a short
-    // string into the textarea instead of the full selection.
-    this.inaccurateSelection = false;
-    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
-    this.hasSelection = false;
-    this.composing = null;
-  };
-
-  function hiddenTextarea() {
-    var te = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none");
-    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
-    // The textarea is kept positioned near the cursor to prevent the
-    // fact that it'll be scrolled into view on input from scrolling
-    // our fake cursor out of view. On webkit, when wrap=off, paste is
-    // very slow. So make the area wide instead.
-    if (webkit) te.style.width = "1000px";
-    else te.setAttribute("wrap", "off");
-    // If border: 0; -- iOS fails to open keyboard (issue #1287)
-    if (ios) te.style.border = "1px solid black";
-    disableBrowserMagic(te);
-    return div;
-  }
-
-  TextareaInput.prototype = copyObj({
-    init: function(display) {
-      var input = this, cm = this.cm;
-
-      // Wraps and hides input textarea
-      var div = this.wrapper = hiddenTextarea();
-      // The semihidden textarea that is focused when the editor is
-      // focused, and receives input.
-      var te = this.textarea = div.firstChild;
-      display.wrapper.insertBefore(div, display.wrapper.firstChild);
-
-      // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
-      if (ios) te.style.width = "0px";
-
-      on(te, "input", function() {
-        if (ie && ie_version >= 9 && input.hasSelection) input.hasSelection = null;
-        input.poll();
-      });
-
-      on(te, "paste", function(e) {
-        if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return
-
-        cm.state.pasteIncoming = true;
-        input.fastPoll();
-      });
-
-      function prepareCopyCut(e) {
-        if (signalDOMEvent(cm, e)) return
-        if (cm.somethingSelected()) {
-          lastCopied = {lineWise: false, text: cm.getSelections()};
-          if (input.inaccurateSelection) {
-            input.prevInput = "";
-            input.inaccurateSelection = false;
-            te.value = lastCopied.text.join("\n");
-            selectInput(te);
+      if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
+      inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css)
+      startStyle = null
+      text = text.slice(part.to - start)
+      start = part.to
+    }
+  }
+}
+
+function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+  var widget = !ignoreWidget && marker.widgetNode
+  if (widget) { builder.map.push(builder.pos, builder.pos + size, widget) }
+  if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+    if (!widget)
+      { widget = builder.content.appendChild(document.createElement("span")) }
+    widget.setAttribute("cm-marker", marker.id)
+  }
+  if (widget) {
+    builder.cm.display.input.setUneditable(widget)
+    builder.content.appendChild(widget)
+  }
+  builder.pos += size
+  builder.trailingSpace = false
+}
+
+// Outputs a number of spans to make up a line, taking highlighting
+// and marked text into account.
+function insertLineContent(line, builder, styles) {
+  var spans = line.markedSpans, allText = line.text, at = 0
+  if (!spans) {
+    for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+      { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)) }
+    return
+  }
+
+  var len = allText.length, pos = 0, i = 1, text = "", style, css
+  var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed
+  for (;;) {
+    if (nextChange == pos) { // Update current marker set
+      spanStyle = spanEndStyle = spanStartStyle = title = css = ""
+      collapsed = null; nextChange = Infinity
+      var foundBookmarks = [], endStyles = (void 0)
+      for (var j = 0; j < spans.length; ++j) {
+        var sp = spans[j], m = sp.marker
+        if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+          foundBookmarks.push(m)
+        } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+          if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+            nextChange = sp.to
+            spanEndStyle = ""
           }
-        } else if (!cm.options.lineWiseCopyCut) {
-          return;
-        } else {
-          var ranges = copyableRanges(cm);
-          lastCopied = {lineWise: true, text: ranges.text};
-          if (e.type == "cut") {
-            cm.setSelections(ranges.ranges, null, sel_dontScroll);
-          } else {
-            input.prevInput = "";
-            te.value = ranges.text.join("\n");
-            selectInput(te);
-          }
+          if (m.className) { spanStyle += " " + m.className }
+          if (m.css) { css = (css ? css + ";" : "") + m.css }
+          if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle }
+          if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to) }
+          if (m.title && !title) { title = m.title }
+          if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+            { collapsed = sp }
+        } else if (sp.from > pos && nextChange > sp.from) {
+          nextChange = sp.from
         }
-        if (e.type == "cut") cm.state.cutIncoming = true;
       }
-      on(te, "cut", prepareCopyCut);
-      on(te, "copy", prepareCopyCut);
-
-      on(display.scroller, "paste", function(e) {
-        if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return;
-        cm.state.pasteIncoming = true;
-        input.focus();
-      });
-
-      // Prevent normal selection in the editor (we handle our own)
-      on(display.lineSpace, "selectstart", function(e) {
-        if (!eventInWidget(display, e)) e_preventDefault(e);
-      });
-
-      on(te, "compositionstart", function() {
-        var start = cm.getCursor("from");
-        if (input.composing) input.composing.range.clear()
-        input.composing = {
-          start: start,
-          range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
-        };
-      });
-      on(te, "compositionend", function() {
-        if (input.composing) {
-          input.poll();
-          input.composing.range.clear();
-          input.composing = null;
+      if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+        { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1] } } }
+
+      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+        { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]) } }
+      if (collapsed && (collapsed.from || 0) == pos) {
+        buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                           collapsed.marker, collapsed.from == null)
+        if (collapsed.to == null) { return }
+        if (collapsed.to == pos) { collapsed = false }
+      }
+    }
+    if (pos >= len) { break }
+
+    var upto = Math.min(len, nextChange)
+    while (true) {
+      if (text) {
+        var end = pos + text.length
+        if (!collapsed) {
+          var tokenText = end > upto ? text.slice(0, upto - pos) : text
+          builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                           spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css)
         }
-      });
-    },
-
-    prepareSelection: function() {
-      // Redraw the selection and/or cursor
-      var cm = this.cm, display = cm.display, doc = cm.doc;
-      var result = prepareSelection(cm);
-
-      // Move the hidden textarea near the cursor to prevent scrolling artifacts
-      if (cm.options.moveInputWithCursor) {
-        var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
-        var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
-        result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
-                                            headPos.top + lineOff.top - wrapOff.top));
-        result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
-                                             headPos.left + lineOff.left - wrapOff.left));
-      }
-
-      return result;
-    },
-
-    showSelection: function(drawn) {
-      var cm = this.cm, display = cm.display;
-      removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
-      removeChildrenAndAdd(display.selectionDiv, drawn.selection);
-      if (drawn.teTop != null) {
-        this.wrapper.style.top = drawn.teTop + "px";
-        this.wrapper.style.left = drawn.teLeft + "px";
+        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+        pos = end
+        spanStartStyle = ""
       }
-    },
-
-    // Reset the input to correspond to the selection (or to be empty,
-    // when not typing and nothing is selected)
-    reset: function(typing) {
-      if (this.contextMenuPending) return;
-      var minimal, selected, cm = this.cm, doc = cm.doc;
-      if (cm.somethingSelected()) {
-        this.prevInput = "";
-        var range = doc.sel.primary();
-        minimal = hasCopyEvent &&
-          (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000);
-        var content = minimal ? "-" : selected || cm.getSelection();
-        this.textarea.value = content;
-        if (cm.state.focused) selectInput(this.textarea);
-        if (ie && ie_version >= 9) this.hasSelection = content;
-      } else if (!typing) {
-        this.prevInput = this.textarea.value = "";
-        if (ie && ie_version >= 9) this.hasSelection = null;
-      }
-      this.inaccurateSelection = minimal;
-    },
-
-    getField: function() { return this.textarea; },
-
-    supportsTouch: function() { return false; },
-
-    focus: function() {
-      if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
-        try { this.textarea.focus(); }
-        catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
-      }
-    },
-
-    blur: function() { this.textarea.blur(); },
-
-    resetPosition: function() {
-      this.wrapper.style.top = this.wrapper.style.left = 0;
-    },
-
-    receivedFocus: function() { this.slowPoll(); },
-
-    // Poll for input changes, using the normal rate of polling. This
-    // runs as long as the editor is focused.
-    slowPoll: function() {
-      var input = this;
-      if (input.pollingFast) return;
-      input.polling.set(this.cm.options.pollInterval, function() {
-        input.poll();
-        if (input.cm.state.focused) input.slowPoll();
-      });
-    },
-
-    // When an event has just come in that is likely to add or change
-    // something in the input textarea, we poll faster, to ensure that
-    // the change appears on the screen quickly.
-    fastPoll: function() {
-      var missed = false, input = this;
-      input.pollingFast = true;
-      function p() {
-        var changed = input.poll();
-        if (!changed && !missed) {missed = true; input.polling.set(60, p);}
-        else {input.pollingFast = false; input.slowPoll();}
+      text = allText.slice(at, at = styles[i++])
+      style = interpretTokenStyle(styles[i++], builder.cm.options)
+    }
+  }
+}
+
+
+// These objects are used to represent the visible (currently drawn)
+// part of the document. A LineView may correspond to multiple
+// logical lines, if those are connected by collapsed ranges.
+function LineView(doc, line, lineN) {
+  // The starting line
+  this.line = line
+  // Continuing lines, if any
+  this.rest = visualLineContinued(line)
+  // Number of logical lines in this visual line
+  this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
+  this.node = this.text = null
+  this.hidden = lineIsHidden(doc, line)
+}
+
+// Create a range of LineView objects for the given lines.
+function buildViewArray(cm, from, to) {
+  var array = [], nextPos
+  for (var pos = from; pos < to; pos = nextPos) {
+    var view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
+    nextPos = pos + view.size
+    array.push(view)
+  }
+  return array
+}
+
+var operationGroup = null
+
+function pushOperation(op) {
+  if (operationGroup) {
+    operationGroup.ops.push(op)
+  } else {
+    op.ownsGroup = operationGroup = {
+      ops: [op],
+      delayedCallbacks: []
+    }
+  }
+}
+
+function fireCallbacksForOps(group) {
+  // Calls delayed callbacks and cursorActivity handlers until no
+  // new ones appear
+  var callbacks = group.delayedCallbacks, i = 0
+  do {
+    for (; i < callbacks.length; i++)
+      { callbacks[i].call(null) }
+    for (var j = 0; j < group.ops.length; j++) {
+      var op = group.ops[j]
+      if (op.cursorActivityHandlers)
+        { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+          { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) } }
+    }
+  } while (i < callbacks.length)
+}
+
+function finishOperation(op, endCb) {
+  var group = op.ownsGroup
+  if (!group) { return }
+
+  try { fireCallbacksForOps(group) }
+  finally {
+    operationGroup = null
+    endCb(group)
+  }
+}
+
+var orphanDelayedCallbacks = null
+
+// Often, we want to signal events at a point where we are in the
+// middle of some work, but don't want the handler to start calling
+// other methods on the editor, which might be in an inconsistent
+// state or simply not expect any other events to happen.
+// signalLater looks whether there are any handlers, and schedules
+// them to be executed when the last operation ends, or, if no
+// operation is active, when a timeout fires.
+function signalLater(emitter, type /*, values...*/) {
+  var arr = getHandlers(emitter, type)
+  if (!arr.length) { return }
+  var args = Array.prototype.slice.call(arguments, 2), list
+  if (operationGroup) {
+    list = operationGroup.delayedCallbacks
+  } else if (orphanDelayedCallbacks) {
+    list = orphanDelayedCallbacks
+  } else {
+    list = orphanDelayedCallbacks = []
+    setTimeout(fireOrphanDelayed, 0)
+  }
+  var loop = function ( i ) {
+    list.push(function () { return arr[i].apply(null, args); })
+  };
+
+  for (var i = 0; i < arr.length; ++i)
+    loop( i );
+}
+
+function fireOrphanDelayed() {
+  var delayed = orphanDelayedCallbacks
+  orphanDelayedCallbacks = null
+  for (var i = 0; i < delayed.length; ++i) { delayed[i]() }
+}
+
+// When an aspect of a line changes, a string is added to
+// lineView.changes. This updates the relevant part of the line's
+// DOM structure.
+function updateLineForChanges(cm, lineView, lineN, dims) {
+  for (var j = 0; j < lineView.changes.length; j++) {
+    var type = lineView.changes[j]
+    if (type == "text") { updateLineText(cm, lineView) }
+    else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims) }
+    else if (type == "class") { updateLineClasses(cm, lineView) }
+    else if (type == "widget") { updateLineWidgets(cm, lineView, dims) }
+  }
+  lineView.changes = null
+}
+
+// Lines with gutter elements, widgets or a background class need to
+// be wrapped, and have the extra elements added to the wrapper div
+function ensureLineWrapped(lineView) {
+  if (lineView.node == lineView.text) {
+    lineView.node = elt("div", null, null, "position: relative")
+    if (lineView.text.parentNode)
+      { lineView.text.parentNode.replaceChild(lineView.node, lineView.text) }
+    lineView.node.appendChild(lineView.text)
+    if (ie && ie_version < 8) { lineView.node.style.zIndex = 2 }
+  }
+  return lineView.node
+}
+
+function updateLineBackground(cm, lineView) {
+  var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
+  if (cls) { cls += " CodeMirror-linebackground" }
+  if (lineView.background) {
+    if (cls) { lineView.background.className = cls }
+    else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
+  } else if (cls) {
+    var wrap = ensureLineWrapped(lineView)
+    lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
+    cm.display.input.setUneditable(lineView.background)
+  }
+}
+
+// Wrapper around buildLineContent which will reuse the structure
+// in display.externalMeasured when possible.
+function getLineContent(cm, lineView) {
+  var ext = cm.display.externalMeasured
+  if (ext && ext.line == lineView.line) {
+    cm.display.externalMeasured = null
+    lineView.measure = ext.measure
+    return ext.built
+  }
+  return buildLineContent(cm, lineView)
+}
+
+// Redraw the line's text. Interacts with the background and text
+// classes because the mode may output tokens that influence these
+// classes.
+function updateLineText(cm, lineView) {
+  var cls = lineView.text.className
+  var built = getLineContent(cm, lineView)
+  if (lineView.text == lineView.node) { lineView.node = built.pre }
+  lineView.text.parentNode.replaceChild(built.pre, lineView.text)
+  lineView.text = built.pre
+  if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+    lineView.bgClass = built.bgClass
+    lineView.textClass = built.textClass
+    updateLineClasses(cm, lineView)
+  } else if (cls) {
+    lineView.text.className = cls
+  }
+}
+
+function updateLineClasses(cm, lineView) {
+  updateLineBackground(cm, lineView)
+  if (lineView.line.wrapClass)
+    { ensureLineWrapped(lineView).className = lineView.line.wrapClass }
+  else if (lineView.node != lineView.text)
+    { lineView.node.className = "" }
+  var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
+  lineView.text.className = textClass || ""
+}
+
+function updateLineGutter(cm, lineView, lineN, dims) {
+  if (lineView.gutter) {
+    lineView.node.removeChild(lineView.gutter)
+    lineView.gutter = null
+  }
+  if (lineView.gutterBackground) {
+    lineView.node.removeChild(lineView.gutterBackground)
+    lineView.gutterBackground = null
+  }
+  if (lineView.line.gutterClass) {
+    var wrap = ensureLineWrapped(lineView)
+    lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                    ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"))
+    cm.display.input.setUneditable(lineView.gutterBackground)
+    wrap.insertBefore(lineView.gutterBackground, lineView.text)
+  }
+  var markers = lineView.line.gutterMarkers
+  if (cm.options.lineNumbers || markers) {
+    var wrap$1 = ensureLineWrapped(lineView)
+    var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"))
+    cm.display.input.setUneditable(gutterWrap)
+    wrap$1.insertBefore(gutterWrap, lineView.text)
+    if (lineView.line.gutterClass)
+      { gutterWrap.className += " " + lineView.line.gutterClass }
+    if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+      { lineView.lineNumber = gutterWrap.appendChild(
+        elt("div", lineNumberFor(cm.options, lineN),
+            "CodeMirror-linenumber CodeMirror-gutter-elt",
+            ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))) }
+    if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
+      var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
+      if (found)
+        { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+                                   ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))) }
+    } }
+  }
+}
+
+function updateLineWidgets(cm, lineView, dims) {
+  if (lineView.alignable) { lineView.alignable = null }
+  for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+    next = node.nextSibling
+    if (node.className == "CodeMirror-linewidget")
+      { lineView.node.removeChild(node) }
+  }
+  insertLineWidgets(cm, lineView, dims)
+}
+
+// Build a line's DOM representation from scratch
+function buildLineElement(cm, lineView, lineN, dims) {
+  var built = getLineContent(cm, lineView)
+  lineView.text = lineView.node = built.pre
+  if (built.bgClass) { lineView.bgClass = built.bgClass }
+  if (built.textClass) { lineView.textClass = built.textClass }
+
+  updateLineClasses(cm, lineView)
+  updateLineGutter(cm, lineView, lineN, dims)
+  insertLineWidgets(cm, lineView, dims)
+  return lineView.node
+}
+
+// A lineView may contain multiple logical lines (when merged by
+// collapsed spans). The widgets for all of them need to be drawn.
+function insertLineWidgets(cm, lineView, dims) {
+  insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
+  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+    { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false) } }
+}
+
+function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+  if (!line.widgets) { return }
+  var wrap = ensureLineWrapped(lineView)
+  for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+    var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
+    if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true") }
+    positionLineWidget(widget, node, lineView, dims)
+    cm.display.input.setUneditable(node)
+    if (allowAbove && widget.above)
+      { wrap.insertBefore(node, lineView.gutter || lineView.text) }
+    else
+      { wrap.appendChild(node) }
+    signalLater(widget, "redraw")
+  }
+}
+
+function positionLineWidget(widget, node, lineView, dims) {
+  if (widget.noHScroll) {
+    ;(lineView.alignable || (lineView.alignable = [])).push(node)
+    var width = dims.wrapperWidth
+    node.style.left = dims.fixedPos + "px"
+    if (!widget.coverGutter) {
+      width -= dims.gutterTotalWidth
+      node.style.paddingLeft = dims.gutterTotalWidth + "px"
+    }
+    node.style.width = width + "px"
+  }
+  if (widget.coverGutter) {
+    node.style.zIndex = 5
+    node.style.position = "relative"
+    if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px" }
+  }
+}
+
+function widgetHeight(widget) {
+  if (widget.height != null) { return widget.height }
+  var cm = widget.doc.cm
+  if (!cm) { return 0 }
+  if (!contains(document.body, widget.node)) {
+    var parentStyle = "position: relative;"
+    if (widget.coverGutter)
+      { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;" }
+    if (widget.noHScroll)
+      { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;" }
+    removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle))
+  }
+  return widget.height = widget.node.parentNode.offsetHeight
+}
+
+// Return true when the given mouse event happened in a widget
+function eventInWidget(display, e) {
+  for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+    if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+        (n.parentNode == display.sizer && n != display.mover))
+      { return true }
+  }
+}
+
+// POSITION MEASUREMENT
+
+function paddingTop(display) {return display.lineSpace.offsetTop}
+function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+function paddingH(display) {
+  if (display.cachedPaddingH) { return display.cachedPaddingH }
+  var e = removeChildrenAndAdd(display.measure, elt("pre", "x"))
+  var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle
+  var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}
+  if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data }
+  return data
+}
+
+function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+function displayWidth(cm) {
+  return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+}
+function displayHeight(cm) {
+  return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+}
+
+// Ensure the lineView.wrapping.heights array is populated. This is
+// an array of bottom offsets for the lines that make up a drawn
+// line. When lineWrapping is on, there might be more than one
+// height.
+function ensureLineHeights(cm, lineView, rect) {
+  var wrapping = cm.options.lineWrapping
+  var curWidth = wrapping && displayWidth(cm)
+  if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+    var heights = lineView.measure.heights = []
+    if (wrapping) {
+      lineView.measure.width = curWidth
+      var rects = lineView.text.firstChild.getClientRects()
+      for (var i = 0; i < rects.length - 1; i++) {
+        var cur = rects[i], next = rects[i + 1]
+        if (Math.abs(cur.bottom - next.bottom) > 2)
+          { heights.push((cur.bottom + next.top) / 2 - rect.top) }
       }
-      input.polling.set(20, p);
-    },
-
-    // Read input from the textarea, and update the document to match.
-    // When something is selected, it is present in the textarea, and
-    // selected (unless it is huge, in which case a placeholder is
-    // used). When nothing is selected, the cursor sits after previously
-    // seen text (can be empty), which is stored in prevInput (we must
-    // not reset the textarea when typing, because that breaks IME).
-    poll: function() {
-      var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
-      // Since this is called a *lot*, try to bail out as cheaply as
-      // possible when it is clear that nothing happened. hasSelection
-      // will be the case when there is a lot of text in the textarea,
-      // in which case reading its value would be expensive.
-      if (this.contextMenuPending || !cm.state.focused ||
-          (hasSelection(input) && !prevInput && !this.composing) ||
-          cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
-        return false;
-
-      var text = input.value;
-      // If nothing changed, bail.
-      if (text == prevInput && !cm.somethingSelected()) return false;
-      // Work around nonsensical selection resetting in IE9/10, and
-      // inexplicable appearance of private area unicode characters on
-      // some key combos in Mac (#2689).
-      if (ie && ie_version >= 9 && this.hasSelection === text ||
-          mac && /[\uf700-\uf7ff]/.test(text)) {
-        cm.display.input.reset();
-        return false;
-      }
-
-      if (cm.doc.sel == cm.display.selForContextMenu) {
-        var first = text.charCodeAt(0);
-        if (first == 0x200b && !prevInput) prevInput = "\u200b";
-        if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo"); }
-      }
-      // Find the part of the input that is actually new
-      var same = 0, l = Math.min(prevInput.length, text.length);
-      while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
-
-      var self = this;
-      runInOp(cm, function() {
-        applyTextInput(cm, text.slice(same), prevInput.length - same,
-                       null, self.composing ? "*compose" : null);
-
-        // Don't leave long text in the textarea, since it makes further polling slow
-        if (text.length > 1000 || text.indexOf("\n") > -1) input.value = self.prevInput = "";
-        else self.prevInput = text;
-
-        if (self.composing) {
-          self.composing.range.clear();
-          self.composing.range = cm.markText(self.composing.start, cm.getCursor("to"),
-                                             {className: "CodeMirror-composing"});
-        }
-      });
-      return true;
-    },
-
-    ensurePolled: function() {
-      if (this.pollingFast && this.poll()) this.pollingFast = false;
-    },
-
-    onKeyPress: function() {
-      if (ie && ie_version >= 9) this.hasSelection = null;
-      this.fastPoll();
-    },
-
-    onContextMenu: function(e) {
-      var input = this, cm = input.cm, display = cm.display, te = input.textarea;
-      var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
-      if (!pos || presto) return; // Opera is difficult.
-
-      // Reset the current text selection only if the click is done outside of the selection
-      // and 'resetSelectionOnContextMenu' option is true.
-      var reset = cm.options.resetSelectionOnContextMenu;
-      if (reset && cm.doc.sel.contains(pos) == -1)
-        operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);
-
-      var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
-      input.wrapper.style.cssText = "position: absolute"
-      var wrapperBox = input.wrapper.getBoundingClientRect()
-      te.style.cssText = "position: absolute; width: 30px; height: 30px; top: " + (e.clientY - wrapperBox.top - 5) +
-        "px; left: " + (e.clientX - wrapperBox.left - 5) + "px; z-index: 1000; background: " +
-        (ie ? "rgba(255, 255, 255, .05)" : "transparent") +
-        "; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
-      if (webkit) var oldScrollY = window.scrollY; // Work around Chrome issue (#2712)
-      display.input.focus();
-      if (webkit) window.scrollTo(null, oldScrollY);
-      display.input.reset();
-      // Adds "Select all" to context menu in FF
-      if (!cm.somethingSelected()) te.value = input.prevInput = " ";
-      input.contextMenuPending = true;
-      display.selForContextMenu = cm.doc.sel;
-      clearTimeout(display.detectingSelectAll);
-
-      // Select-all will be greyed out if there's nothing to select, so
-      // this adds a zero-width space so that we can later check whether
-      // it got selected.
-      function prepareSelectAllHack() {
-        if (te.selectionStart != null) {
-          var selected = cm.somethingSelected();
-          var extval = "\u200b" + (selected ? te.value : "");
-          te.value = "\u21da"; // Used to catch context-menu undo
-          te.value = extval;
-          input.prevInput = selected ? "" : "\u200b";
-          te.selectionStart = 1; te.selectionEnd = extval.length;
-          // Re-set this, in case some other handler touched the
-          // selection in the meantime.
-          display.selForContextMenu = cm.doc.sel;
+    }
+    heights.push(rect.bottom - rect.top)
+  }
+}
+
+// Find a line map (mapping character offsets to text nodes) and a
+// measurement cache for the given line number. (A line view might
+// contain multiple lines when collapsed ranges are present.)
+function mapFromLineView(lineView, line, lineN) {
+  if (lineView.line == line)
+    { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+  for (var i = 0; i < lineView.rest.length; i++)
+    { if (lineView.rest[i] == line)
+      { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+  for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+    { if (lineNo(lineView.rest[i$1]) > lineN)
+      { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+}
+
+// Render a line into the hidden node display.externalMeasured. Used
+// when measurement is needed for a line that's not in the viewport.
+function updateExternalMeasurement(cm, line) {
+  line = visualLine(line)
+  var lineN = lineNo(line)
+  var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN)
+  view.lineN = lineN
+  var built = view.built = buildLineContent(cm, view)
+  view.text = built.pre
+  removeChildrenAndAdd(cm.display.lineMeasure, built.pre)
+  return view
+}
+
+// Get a {top, bottom, left, right} box (in line-local coordinates)
+// for a given character.
+function measureChar(cm, line, ch, bias) {
+  return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+}
+
+// Find a line view that corresponds to the given line number.
+function findViewForLine(cm, lineN) {
+  if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+    { return cm.display.view[findViewIndex(cm, lineN)] }
+  var ext = cm.display.externalMeasured
+  if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+    { return ext }
+}
+
+// Measurement can be split in two steps, the set-up work that
+// applies to the whole line, and the measurement of the actual
+// character. Functions like coordsChar, that need to do a lot of
+// measurements in a row, can thus ensure that the set-up work is
+// only done once.
+function prepareMeasureForLine(cm, line) {
+  var lineN = lineNo(line)
+  var view = findViewForLine(cm, lineN)
+  if (view && !view.text) {
+    view = null
+  } else if (view && view.changes) {
+    updateLineForChanges(cm, view, lineN, getDimensions(cm))
+    cm.curOp.forceUpdate = true
+  }
+  if (!view)
+    { view = updateExternalMeasurement(cm, line) }
+
+  var info = mapFromLineView(view, line, lineN)
+  return {
+    line: line, view: view, rect: null,
+    map: info.map, cache: info.cache, before: info.before,
+    hasHeights: false
+  }
+}
+
+// Given a prepared measurement object, measures the position of an
+// actual character (or fetches it from the cache).
+function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+  if (prepared.before) { ch = -1 }
+  var key = ch + (bias || ""), found
+  if (prepared.cache.hasOwnProperty(key)) {
+    found = prepared.cache[key]
+  } else {
+    if (!prepared.rect)
+      { prepared.rect = prepared.view.text.getBoundingClientRect() }
+    if (!prepared.hasHeights) {
+      ensureLineHeights(cm, prepared.view, prepared.rect)
+      prepared.hasHeights = true
+    }
+    found = measureCharInner(cm, prepared, ch, bias)
+    if (!found.bogus) { prepared.cache[key] = found }
+  }
+  return {left: found.left, right: found.right,
+          top: varHeight ? found.rtop : found.top,
+          bottom: varHeight ? found.rbottom : found.bottom}
+}
+
+var nullRect = {left: 0, right: 0, top: 0, bottom: 0}
+
+function nodeAndOffsetInLineMap(map, ch, bias) {
+  var node, start, end, collapse, mStart, mEnd
+  // First, search the line map for the text node corresponding to,
+  // or closest to, the target character.
+  for (var i = 0; i < map.length; i += 3) {
+    mStart = map[i]
+    mEnd = map[i + 1]
+    if (ch < mStart) {
+      start = 0; end = 1
+      collapse = "left"
+    } else if (ch < mEnd) {
+      start = ch - mStart
+      end = start + 1
+    } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
+      end = mEnd - mStart
+      start = end - 1
+      if (ch >= mEnd) { collapse = "right" }
+    }
+    if (start != null) {
+      node = map[i + 2]
+      if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+        { collapse = bias }
+      if (bias == "left" && start == 0)
+        { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
+          node = map[(i -= 3) + 2]
+          collapse = "left"
+        } }
+      if (bias == "right" && start == mEnd - mStart)
+        { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
+          node = map[(i += 3) + 2]
+          collapse = "right"
+        } }
+      break
+    }
+  }
+  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+}
+
+function getUsefulRect(rects, bias) {
+  var rect = nullRect
+  if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+    if ((rect = rects[i]).left != rect.right) { break }
+  } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+    if ((rect = rects[i$1]).left != rect.right) { break }
+  } }
+  return rect
+}
+
+function measureCharInner(cm, prepared, ch, bias) {
+  var place = nodeAndOffsetInLineMap(prepared.map, ch, bias)
+  var node = place.node, start = place.start, end = place.end, collapse = place.collapse
+
+  var rect
+  if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+    for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+      while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start }
+      while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end }
+      if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+        { rect = node.parentNode.getBoundingClientRect() }
+      else
+        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias) }
+      if (rect.left || rect.right || start == 0) { break }
+      end = start
+      start = start - 1
+      collapse = "right"
+    }
+    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect) }
+  } else { // If it is a widget, simply get the box for the whole widget.
+    if (start > 0) { collapse = bias = "right" }
+    var rects
+    if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+      { rect = rects[bias == "right" ? rects.length - 1 : 0] }
+    else
+      { rect = node.getBoundingClientRect() }
+  }
+  if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+    var rSpan = node.parentNode.getClientRects()[0]
+    if (rSpan)
+      { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom} }
+    else
+      { rect = nullRect }
+  }
+
+  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top
+  var mid = (rtop + rbot) / 2
+  var heights = prepared.view.measure.heights
+  var i = 0
+  for (; i < heights.length - 1; i++)
+    { if (mid < heights[i]) { break } }
+  var top = i ? heights[i - 1] : 0, bot = heights[i]
+  var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                top: top, bottom: bot}
+  if (!rect.left && !rect.right) { result.bogus = true }
+  if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot }
+
+  return result
+}
+
+// Work around problem with bounding client rects on ranges being
+// returned incorrectly when zoomed on IE10 and below.
+function maybeUpdateRectForZooming(measure, rect) {
+  if (!window.screen || screen.logicalXDPI == null ||
+      screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+    { return rect }
+  var scaleX = screen.logicalXDPI / screen.deviceXDPI
+  var scaleY = screen.logicalYDPI / screen.deviceYDPI
+  return {left: rect.left * scaleX, right: rect.right * scaleX,
+          top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+}
+
+function clearLineMeasurementCacheFor(lineView) {
+  if (lineView.measure) {
+    lineView.measure.cache = {}
+    lineView.measure.heights = null
+    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+      { lineView.measure.caches[i] = {} } }
+  }
+}
+
+function clearLineMeasurementCache(cm) {
+  cm.display.externalMeasure = null
+  removeChildren(cm.display.lineMeasure)
+  for (var i = 0; i < cm.display.view.length; i++)
+    { clearLineMeasurementCacheFor(cm.display.view[i]) }
+}
+
+function clearCaches(cm) {
+  clearLineMeasurementCache(cm)
+  cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null
+  if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true }
+  cm.display.lineNumChars = null
+}
+
+function pageScrollX() {
+  // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+  // which causes page_Offset and bounding client rects to use
+  // different reference viewports and invalidate our calculations.
+  if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+  return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+}
+function pageScrollY() {
+  if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+  return window.pageYOffset || (document.documentElement || document.body).scrollTop
+}
+
+// Converts a {top, bottom, left, right} box from line-local
+// coordinates into another coordinate system. Context may be one of
+// "line", "div" (display.lineDiv), "local"./null (editor), "window",
+// or "page".
+function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+  if (!includeWidgets && lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above) {
+    var size = widgetHeight(lineObj.widgets[i])
+    rect.top += size; rect.bottom += size
+  } } }
+  if (context == "line") { return rect }
+  if (!context) { context = "local" }
+  var yOff = heightAtLine(lineObj)
+  if (context == "local") { yOff += paddingTop(cm.display) }
+  else { yOff -= cm.display.viewOffset }
+  if (context == "page" || context == "window") {
+    var lOff = cm.display.lineSpace.getBoundingClientRect()
+    yOff += lOff.top + (context == "window" ? 0 : pageScrollY())
+    var xOff = lOff.left + (context == "window" ? 0 : pageScrollX())
+    rect.left += xOff; rect.right += xOff
+  }
+  rect.top += yOff; rect.bottom += yOff
+  return rect
+}
+
+// Coverts a box from "div" coords to another coordinate system.
+// Context may be "window", "page", "div", or "local"./null.
+function fromCoordSystem(cm, coords, context) {
+  if (context == "div") { return coords }
+  var left = coords.left, top = coords.top
+  // First move into "page" coordinate system
+  if (context == "page") {
+    left -= pageScrollX()
+    top -= pageScrollY()
+  } else if (context == "local" || !context) {
+    var localBox = cm.display.sizer.getBoundingClientRect()
+    left += localBox.left
+    top += localBox.top
+  }
+
+  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect()
+  return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+}
+
+function charCoords(cm, pos, context, lineObj, bias) {
+  if (!lineObj) { lineObj = getLine(cm.doc, pos.line) }
+  return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+}
+
+// Returns a box for a given cursor position, which may have an
+// 'other' property containing the position of the secondary cursor
+// on a bidi boundary.
+// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+// and after `char - 1` in writing order of `char - 1`
+// A cursor Pos(line, char, "after") is on the same visual line as `char`
+// and before `char` in writing order of `char`
+// Examples (upper-case letters are RTL, lower-case are LTR):
+//     Pos(0, 1, ...)
+//     before   after
+// ab     a|b     a|b
+// aB     a|B     aB|
+// Ab     |Ab     A|b
+// AB     B|A     B|A
+// Every position after the last character on a line is considered to stick
+// to the last character on the line.
+function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+  lineObj = lineObj || getLine(cm.doc, pos.line)
+  if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
+  function get(ch, right) {
+    var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight)
+    if (right) { m.left = m.right; } else { m.right = m.left }
+    return intoCoordSystem(cm, lineObj, m, context)
+  }
+  var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky
+  if (ch >= lineObj.text.length) {
+    ch = lineObj.text.length
+    sticky = "before"
+  } else if (ch <= 0) {
+    ch = 0
+    sticky = "after"
+  }
+  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+  function getBidi(ch, partPos, invert) {
+    var part = order[partPos], right = (part.level % 2) != 0
+    return get(invert ? ch - 1 : ch, right != invert)
+  }
+  var partPos = getBidiPartAt(order, ch, sticky)
+  var other = bidiOther
+  var val = getBidi(ch, partPos, sticky == "before")
+  if (other != null) { val.other = getBidi(ch, other, sticky != "before") }
+  return val
+}
+
+// Used to cheaply estimate the coordinates for a position. Used for
+// intermediate scroll updates.
+function estimateCoords(cm, pos) {
+  var left = 0
+  pos = clipPos(cm.doc, pos)
+  if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch }
+  var lineObj = getLine(cm.doc, pos.line)
+  var top = heightAtLine(lineObj) + paddingTop(cm.display)
+  return {left: left, right: left, top: top, bottom: top + lineObj.height}
+}
+
+// Positions returned by coordsChar contain some extra information.
+// xRel is the relative x position of the input coordinates compared
+// to the found position (so xRel > 0 means the coordinates are to
+// the right of the character position, for example). When outside
+// is true, that means the coordinates lie outside the line's
+// vertical range.
+function PosWithInfo(line, ch, sticky, outside, xRel) {
+  var pos = Pos(line, ch, sticky)
+  pos.xRel = xRel
+  if (outside) { pos.outside = true }
+  return pos
+}
+
+// Compute the character position closest to the given coordinates.
+// Input must be lineSpace-local ("div" coordinate system).
+function coordsChar(cm, x, y) {
+  var doc = cm.doc
+  y += cm.display.viewOffset
+  if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
+  var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1
+  if (lineN > last)
+    { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
+  if (x < 0) { x = 0 }
+
+  var lineObj = getLine(doc, lineN)
+  for (;;) {
+    var found = coordsCharInner(cm, lineObj, lineN, x, y)
+    var merged = collapsedSpanAtEnd(lineObj)
+    var mergedPos = merged && merged.find(0, true)
+    if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
+      { lineN = lineNo(lineObj = mergedPos.to.line) }
+    else
+      { return found }
+  }
+}
+
+function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+  var measure = function (ch) { return intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, ch), "line"); }
+  var end = lineObj.text.length
+  var begin = findFirst(function (ch) { return measure(ch - 1).bottom <= y; }, end, 0)
+  end = findFirst(function (ch) { return measure(ch).top > y; }, begin, end)
+  return {begin: begin, end: end}
+}
+
+function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+  var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top
+  return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+}
+
+function coordsCharInner(cm, lineObj, lineNo, x, y) {
+  y -= heightAtLine(lineObj)
+  var begin = 0, end = lineObj.text.length
+  var preparedMeasure = prepareMeasureForLine(cm, lineObj)
+  var pos
+  var order = getOrder(lineObj, cm.doc.direction)
+  if (order) {
+    if (cm.options.lineWrapping) {
+      ;var assign;
+      ((assign = wrappedLineExtent(cm, lineObj, preparedMeasure, y), begin = assign.begin, end = assign.end, assign))
+    }
+    pos = new Pos(lineNo, Math.floor(begin + (end - begin) / 2))
+    var beginLeft = cursorCoords(cm, pos, "line", lineObj, preparedMeasure).left
+    var dir = beginLeft < x ? 1 : -1
+    var prevDiff, diff = beginLeft - x, prevPos
+    var steps = Math.ceil((end - begin) / 4)
+    outer: do {
+      prevDiff = diff
+      prevPos = pos
+      var i = 0
+      for (; i < steps; ++i) {
+        var prevPos$1 = pos
+        pos = moveVisually(cm, lineObj, pos, dir)
+        if (pos == null || pos.ch < begin || end <= (pos.sticky == "before" ? pos.ch - 1 : pos.ch)) {
+          pos = prevPos$1
+          break outer
         }
       }
-      function rehide() {
-        input.contextMenuPending = false;
-        input.wrapper.style.cssText = oldWrapperCSS
-        te.style.cssText = oldCSS;
-        if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos);
-
-        // Try to detect the user choosing select-all
-        if (te.selectionStart != null) {
-          if (!ie || (ie && ie_version < 9)) prepareSelectAllHack();
-          var i = 0, poll = function() {
-            if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
-                te.selectionEnd > 0 && input.prevInput == "\u200b")
-              operation(cm, commands.selectAll)(cm);
-            else if (i++ < 10) display.detectingSelectAll = setTimeout(poll, 500);
-            else display.input.reset();
-          };
-          display.detectingSelectAll = setTimeout(poll, 200);
-        }
+      diff = cursorCoords(cm, pos, "line", lineObj, preparedMeasure).left - x
+      if (steps > 1) {
+        var diff_change_per_step = Math.abs(diff - prevDiff) / steps
+        steps = Math.min(steps, Math.ceil(Math.abs(diff) / diff_change_per_step))
+        dir = diff < 0 ? 1 : -1
+      }
+    } while (diff != 0 && (steps > 1 || ((dir < 0) != (diff < 0) && (Math.abs(diff) <= Math.abs(prevDiff)))))
+    if (Math.abs(diff) > Math.abs(prevDiff)) {
+      if ((diff < 0) == (prevDiff < 0)) { throw new Error("Broke out of infinite loop in coordsCharInner") }
+      pos = prevPos
+    }
+  } else {
+    var ch = findFirst(function (ch) {
+      var box = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, ch), "line")
+      if (box.top > y) {
+        // For the cursor stickiness
+        end = Math.min(ch, end)
+        return true
       }
-
-      if (ie && ie_version >= 9) prepareSelectAllHack();
-      if (captureRightClick) {
-        e_stop(e);
-        var mouseup = function() {
-          off(window, "mouseup", mouseup);
-          setTimeout(rehide, 20);
-        };
-        on(window, "mouseup", mouseup);
+      else if (box.bottom <= y) { return false }
+      else if (box.left > x) { return true }
+      else if (box.right < x) { return false }
+      else { return (x - box.left < box.right - x) }
+    }, begin, end)
+    ch = skipExtendingChars(lineObj.text, ch, 1)
+    pos = new Pos(lineNo, ch, ch == end ? "before" : "after")
+  }
+  var coords = cursorCoords(cm, pos, "line", lineObj, preparedMeasure)
+  if (y < coords.top || coords.bottom < y) { pos.outside = true }
+  pos.xRel = x < coords.left ? -1 : (x > coords.right ? 1 : 0)
+  return pos
+}
+
+var measureText
+// Compute the default text height.
+function textHeight(display) {
+  if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+  if (measureText == null) {
+    measureText = elt("pre")
+    // Measure a bunch of lines, for browsers that compute
+    // fractional heights.
+    for (var i = 0; i < 49; ++i) {
+      measureText.appendChild(document.createTextNode("x"))
+      measureText.appendChild(elt("br"))
+    }
+    measureText.appendChild(document.createTextNode("x"))
+  }
+  removeChildrenAndAdd(display.measure, measureText)
+  var height = measureText.offsetHeight / 50
+  if (height > 3) { display.cachedTextHeight = height }
+  removeChildren(display.measure)
+  return height || 1
+}
+
+// Compute the default character width.
+function charWidth(display) {
+  if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+  var anchor = elt("span", "xxxxxxxxxx")
+  var pre = elt("pre", [anchor])
+  removeChildrenAndAdd(display.measure, pre)
+  var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10
+  if (width > 2) { display.cachedCharWidth = width }
+  return width || 10
+}
+
+// Do a bulk-read of the DOM positions and sizes needed to draw the
+// view, so that we don't interleave reading and writing to the DOM.
+function getDimensions(cm) {
+  var d = cm.display, left = {}, width = {}
+  var gutterLeft = d.gutters.clientLeft
+  for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+    left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft
+    width[cm.options.gutters[i]] = n.clientWidth
+  }
+  return {fixedPos: compensateForHScroll(d),
+          gutterTotalWidth: d.gutters.offsetWidth,
+          gutterLeft: left,
+          gutterWidth: width,
+          wrapperWidth: d.wrapper.clientWidth}
+}
+
+// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+// but using getBoundingClientRect to get a sub-pixel-accurate
+// result.
+function compensateForHScroll(display) {
+  return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+}
+
+// Returns a function that estimates the height of a line, to use as
+// first approximation until the line becomes visible (and is thus
+// properly measurable).
+function estimateHeight(cm) {
+  var th = textHeight(cm.display), wrapping = cm.options.lineWrapping
+  var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3)
+  return function (line) {
+    if (lineIsHidden(cm.doc, line)) { return 0 }
+
+    var widgetsHeight = 0
+    if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+      if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height }
+    } }
+
+    if (wrapping)
+      { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+    else
+      { return widgetsHeight + th }
+  }
+}
+
+function estimateLineHeights(cm) {
+  var doc = cm.doc, est = estimateHeight(cm)
+  doc.iter(function (line) {
+    var estHeight = est(line)
+    if (estHeight != line.height) { updateLineHeight(line, estHeight) }
+  })
+}
+
+// Given a mouse event, find the corresponding position. If liberal
+// is false, it checks whether a gutter or scrollbar was clicked,
+// and returns null if it was. forRect is used by rectangular
+// selections, and tries to estimate a character position even for
+// coordinates beyond the right of the text.
+function posFromMouse(cm, e, liberal, forRect) {
+  var display = cm.display
+  if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+  var x, y, space = display.lineSpace.getBoundingClientRect()
+  // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+  try { x = e.clientX - space.left; y = e.clientY - space.top }
+  catch (e) { return null }
+  var coords = coordsChar(cm, x, y), line
+  if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+    var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length
+    coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))
+  }
+  return coords
+}
+
+// Find the view element corresponding to a given line. Return null
+// when the line isn't visible.
+function findViewIndex(cm, n) {
+  if (n >= cm.display.viewTo) { return null }
+  n -= cm.display.viewFrom
+  if (n < 0) { return null }
+  var view = cm.display.view
+  for (var i = 0; i < view.length; i++) {
+    n -= view[i].size
+    if (n < 0) { return i }
+  }
+}
+
+function updateSelection(cm) {
+  cm.display.input.showSelection(cm.display.input.prepareSelection())
+}
+
+function prepareSelection(cm, primary) {
+  var doc = cm.doc, result = {}
+  var curFragment = result.cursors = document.createDocumentFragment()
+  var selFragment = result.selection = document.createDocumentFragment()
+
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    if (primary === false && i == doc.sel.primIndex) { continue }
+    var range = doc.sel.ranges[i]
+    if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
+    var collapsed = range.empty()
+    if (collapsed || cm.options.showCursorWhenSelecting)
+      { drawSelectionCursor(cm, range.head, curFragment) }
+    if (!collapsed)
+      { drawSelectionRange(cm, range, selFragment) }
+  }
+  return result
+}
+
+// Draws a cursor for the given range
+function drawSelectionCursor(cm, head, output) {
+  var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)
+
+  var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
+  cursor.style.left = pos.left + "px"
+  cursor.style.top = pos.top + "px"
+  cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"
+
+  if (pos.other) {
+    // Secondary cursor, shown when on a 'jump' in bi-directional text
+    var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
+    otherCursor.style.display = ""
+    otherCursor.style.left = pos.other.left + "px"
+    otherCursor.style.top = pos.other.top + "px"
+    otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
+  }
+}
+
+// Draws the given range as a highlighted selection
+function drawSelectionRange(cm, range, output) {
+  var display = cm.display, doc = cm.doc
+  var fragment = document.createDocumentFragment()
+  var padding = paddingH(cm.display), leftSide = padding.left
+  var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right
+
+  function add(left, top, width, bottom) {
+    if (top < 0) { top = 0 }
+    top = Math.round(top)
+    bottom = Math.round(bottom)
+    fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")))
+  }
+
+  function drawForLine(line, fromArg, toArg) {
+    var lineObj = getLine(doc, line)
+    var lineLen = lineObj.text.length
+    var start, end
+    function coords(ch, bias) {
+      return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+    }
+
+    iterateBidiSections(getOrder(lineObj, doc.direction), fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir) {
+      var leftPos = coords(from, "left"), rightPos, left, right
+      if (from == to) {
+        rightPos = leftPos
+        left = right = leftPos.left
       } else {
-        setTimeout(rehide, 50);
+        rightPos = coords(to - 1, "right")
+        if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp }
+        left = leftPos.left
+        right = rightPos.right
+      }
+      if (fromArg == null && from == 0) { left = leftSide }
+      if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
+        add(left, leftPos.top, null, leftPos.bottom)
+        left = leftSide
+        if (leftPos.bottom < rightPos.top) { add(left, leftPos.bottom, null, rightPos.top) }
+      }
+      if (toArg == null && to == lineLen) { right = rightSide }
+      if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
+        { start = leftPos }
+      if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
+        { end = rightPos }
+      if (left < leftSide + 1) { left = leftSide }
+      add(left, rightPos.top, right - left, rightPos.bottom)
+    })
+    return {start: start, end: end}
+  }
+
+  var sFrom = range.from(), sTo = range.to()
+  if (sFrom.line == sTo.line) {
+    drawForLine(sFrom.line, sFrom.ch, sTo.ch)
+  } else {
+    var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
+    var singleVLine = visualLine(fromLine) == visualLine(toLine)
+    var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
+    var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
+    if (singleVLine) {
+      if (leftEnd.top < rightStart.top - 2) {
+        add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
+        add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
+      } else {
+        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
       }
-    },
-
-    readOnlyChanged: function(val) {
-      if (!val) this.reset();
-    },
-
-    setUneditable: nothing,
-
-    needsContentAttribute: false
-  }, TextareaInput.prototype);
-
-  // CONTENTEDITABLE INPUT STYLE
-
-  function ContentEditableInput(cm) {
-    this.cm = cm;
-    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
-    this.polling = new Delayed();
-    this.gracePeriod = false;
-  }
-
-  ContentEditableInput.prototype = copyObj({
-    init: function(display) {
-      var input = this, cm = input.cm;
-      var div = input.div = display.lineDiv;
-      disableBrowserMagic(div);
-
-      on(div, "paste", function(e) {
-        if (!signalDOMEvent(cm, e)) handlePaste(e, cm);
-      })
-
-      on(div, "compositionstart", function(e) {
-        var data = e.data;
-        input.composing = {sel: cm.doc.sel, data: data, startData: data};
-        if (!data) return;
-        var prim = cm.doc.sel.primary();
-        var line = cm.getLine(prim.head.line);
-        var found = line.indexOf(data, Math.max(0, prim.head.ch - data.length));
-        if (found > -1 && found <= prim.head.ch)
-          input.composing.sel = simpleSelection(Pos(prim.head.line, found),
-                                                Pos(prim.head.line, found + data.length));
-      });
-      on(div, "compositionupdate", function(e) {
-        input.composing.data = e.data;
-      });
-      on(div, "compositionend", function(e) {
-        var ours = input.composing;
-        if (!ours) return;
-        if (e.data != ours.startData && !/\u200b/.test(e.data))
-          ours.data = e.data;
-        // Need a small delay to prevent other code (input event,
-        // selection polling) from doing damage when fired right after
-        // compositionend.
-        setTimeout(function() {
-          if (!ours.handled)
-            input.applyComposition(ours);
-          if (input.composing == ours)
-            input.composing = null;
-        }, 50);
-      });
-
-      on(div, "touchstart", function() {
-        input.forceCompositionEnd();
-      });
-
-      on(div, "input", function() {
-        if (input.composing) return;
-        if (cm.isReadOnly() || !input.pollContent())
-          runInOp(input.cm, function() {regChange(cm);});
-      });
-
-      function onCopyCut(e) {
-        if (signalDOMEvent(cm, e)) return
-        if (cm.somethingSelected()) {
-          lastCopied = {lineWise: false, text: cm.getSelections()};
-          if (e.type == "cut") cm.replaceSelection("", null, "cut");
-        } else if (!cm.options.lineWiseCopyCut) {
-          return;
-        } else {
-          var ranges = copyableRanges(cm);
-          lastCopied = {lineWise: true, text: ranges.text};
-          if (e.type == "cut") {
-            cm.operation(function() {
-              cm.setSelections(ranges.ranges, 0, sel_dontScroll);
-              cm.replaceSelection("", null, "cut");
-            });
-          }
-        }
-        // iOS exposes the clipboard API, but seems to discard content inserted into it
-        if (e.clipboardData && !ios) {
-          e.preventDefault();
-          e.clipboardData.clearData();
-          e.clipboardData.setData("text/plain", lastCopied.text.join("\n"));
-        } else {
-          // Old-fashioned briefly-focus-a-textarea hack
-          var kludge = hiddenTextarea(), te = kludge.firstChild;
-          cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
-          te.value = lastCopied.text.join("\n");
-          var hadFocus = document.activeElement;
-          selectInput(te);
-          setTimeout(function() {
-            cm.display.lineSpace.removeChild(kludge);
-            hadFocus.focus();
-          }, 50);
+    }
+    if (leftEnd.bottom < rightStart.top)
+      { add(leftSide, leftEnd.bottom, null, rightStart.top) }
+  }
+
+  output.appendChild(fragment)
+}
+
+// Cursor-blinking
+function restartBlink(cm) {
+  if (!cm.state.focused) { return }
+  var display = cm.display
+  clearInterval(display.blinker)
+  var on = true
+  display.cursorDiv.style.visibility = ""
+  if (cm.options.cursorBlinkRate > 0)
+    { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
+      cm.options.cursorBlinkRate) }
+  else if (cm.options.cursorBlinkRate < 0)
+    { display.cursorDiv.style.visibility = "hidden" }
+}
+
+function ensureFocus(cm) {
+  if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm) }
+}
+
+function delayBlurEvent(cm) {
+  cm.state.delayingBlurEvent = true
+  setTimeout(function () { if (cm.state.delayingBlurEvent) {
+    cm.state.delayingBlurEvent = false
+    onBlur(cm)
+  } }, 100)
+}
+
+function onFocus(cm, e) {
+  if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false }
+
+  if (cm.options.readOnly == "nocursor") { return }
+  if (!cm.state.focused) {
+    signal(cm, "focus", cm, e)
+    cm.state.focused = true
+    addClass(cm.display.wrapper, "CodeMirror-focused")
+    // This test prevents this from firing when a context
+    // menu is closed (since the input reset would kill the
+    // select-all detection hack)
+    if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+      cm.display.input.reset()
+      if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20) } // Issue #1730
+    }
+    cm.display.input.receivedFocus()
+  }
+  restartBlink(cm)
+}
+function onBlur(cm, e) {
+  if (cm.state.delayingBlurEvent) { return }
+
+  if (cm.state.focused) {
+    signal(cm, "blur", cm, e)
+    cm.state.focused = false
+    rmClass(cm.display.wrapper, "CodeMirror-focused")
+  }
+  clearInterval(cm.display.blinker)
+  setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false } }, 150)
+}
+
+// Read the actual heights of the rendered lines, and update their
+// stored heights to match.
+function updateHeightsInViewport(cm) {
+  var display = cm.display
+  var prevBottom = display.lineDiv.offsetTop
+  for (var i = 0; i < display.view.length; i++) {
+    var cur = display.view[i], height = (void 0)
+    if (cur.hidden) { continue }
+    if (ie && ie_version < 8) {
+      var bot = cur.node.offsetTop + cur.node.offsetHeight
+      height = bot - prevBottom
+      prevBottom = bot
+    } else {
+      var box = cur.node.getBoundingClientRect()
+      height = box.bottom - box.top
+    }
+    var diff = cur.line.height - height
+    if (height < 2) { height = textHeight(display) }
+    if (diff > .005 || diff < -.005) {
+      updateLineHeight(cur.line, height)
+      updateWidgetHeight(cur.line)
+      if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+        { updateWidgetHeight(cur.rest[j]) } }
+    }
+  }
+}
+
+// Read and store the height of line widgets associated with the
+// given line.
+function updateWidgetHeight(line) {
+  if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
+    { line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight } }
+}
+
+// Compute the lines that are visible in a given viewport (defaults
+// the the current scroll position). viewport may contain top,
+// height, and ensure (see op.scrollToPos) properties.
+function visibleLines(display, doc, viewport) {
+  var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
+  top = Math.floor(top - paddingTop(display))
+  var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight
+
+  var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
+  // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+  // forces those lines into the viewport (if possible).
+  if (viewport && viewport.ensure) {
+    var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
+    if (ensureFrom < from) {
+      from = ensureFrom
+      to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
+    } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+      from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
+      to = ensureTo
+    }
+  }
+  return {from: from, to: Math.max(to, from + 1)}
+}
+
+// Re-align line numbers and gutter marks to compensate for
+// horizontal scrolling.
+function alignHorizontally(cm) {
+  var display = cm.display, view = display.view
+  if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+  var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
+  var gutterW = display.gutters.offsetWidth, left = comp + "px"
+  for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+    if (cm.options.fixedGutter) {
+      if (view[i].gutter)
+        { view[i].gutter.style.left = left }
+      if (view[i].gutterBackground)
+        { view[i].gutterBackground.style.left = left }
+    }
+    var align = view[i].alignable
+    if (align) { for (var j = 0; j < align.length; j++)
+      { align[j].style.left = left } }
+  } }
+  if (cm.options.fixedGutter)
+    { display.gutters.style.left = (comp + gutterW) + "px" }
+}
+
+// Used to ensure that the line number gutter is still the right
+// size for the current document size. Returns true when an update
+// is needed.
+function maybeUpdateLineNumberWidth(cm) {
+  if (!cm.options.lineNumbers) { return false }
+  var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
+  if (last.length != display.lineNumChars) {
+    var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                               "CodeMirror-linenumber CodeMirror-gutter-elt"))
+    var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
+    display.lineGutter.style.width = ""
+    display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
+    display.lineNumWidth = display.lineNumInnerWidth + padding
+    display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
+    display.lineGutter.style.width = display.lineNumWidth + "px"
+    updateGutterSpace(cm)
+    return true
+  }
+  return false
+}
+
+// SCROLLING THINGS INTO VIEW
+
+// If an editor sits on the top or bottom of the window, partially
+// scrolled out of view, this ensures that the cursor is visible.
+function maybeScrollWindow(cm, rect) {
+  if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+  var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null
+  if (rect.top + box.top < 0) { doScroll = true }
+  else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false }
+  if (doScroll != null && !phantom) {
+    var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"))
+    cm.display.lineSpace.appendChild(scrollNode)
+    scrollNode.scrollIntoView(doScroll)
+    cm.display.lineSpace.removeChild(scrollNode)
+  }
+}
+
+// Scroll a given position into view (immediately), verifying that
+// it actually became visible (as line heights are accurately
+// measured, the position of something may 'drift' during drawing).
+function scrollPosIntoView(cm, pos, end, margin) {
+  if (margin == null) { margin = 0 }
+  var rect
+  if (!cm.options.lineWrapping && pos == end) {
+    // Set pos and end to the cursor positions around the character pos sticks to
+    // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+    // If pos == Pos(_, 0, "before"), pos and end are unchanged
+    pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos
+    end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos
+  }
+  for (var limit = 0; limit < 5; limit++) {
+    var changed = false
+    var coords = cursorCoords(cm, pos)
+    var endCoords = !end || end == pos ? coords : cursorCoords(cm, end)
+    rect = {left: Math.min(coords.left, endCoords.left),
+            top: Math.min(coords.top, endCoords.top) - margin,
+            right: Math.max(coords.left, endCoords.left),
+            bottom: Math.max(coords.bottom, endCoords.bottom) + margin}
+    var scrollPos = calculateScrollPos(cm, rect)
+    var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft
+    if (scrollPos.scrollTop != null) {
+      updateScrollTop(cm, scrollPos.scrollTop)
+      if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true }
+    }
+    if (scrollPos.scrollLeft != null) {
+      setScrollLeft(cm, scrollPos.scrollLeft)
+      if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true }
+    }
+    if (!changed) { break }
+  }
+  return rect
+}
+
+// Scroll a given set of coordinates into view (immediately).
+function scrollIntoView(cm, rect) {
+  var scrollPos = calculateScrollPos(cm, rect)
+  if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop) }
+  if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft) }
+}
+
+// Calculate a new scroll position needed to scroll the given
+// rectangle into view. Returns an object with scrollTop and
+// scrollLeft properties. When these are undefined, the
+// vertical/horizontal position does not need to be adjusted.
+function calculateScrollPos(cm, rect) {
+  var display = cm.display, snapMargin = textHeight(cm.display)
+  if (rect.top < 0) { rect.top = 0 }
+  var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop
+  var screen = displayHeight(cm), result = {}
+  if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen }
+  var docBottom = cm.doc.height + paddingVert(display)
+  var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin
+  if (rect.top < screentop) {
+    result.scrollTop = atTop ? 0 : rect.top
+  } else if (rect.bottom > screentop + screen) {
+    var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen)
+    if (newTop != screentop) { result.scrollTop = newTop }
+  }
+
+  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft
+  var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0)
+  var tooWide = rect.right - rect.left > screenw
+  if (tooWide) { rect.right = rect.left + screenw }
+  if (rect.left < 10)
+    { result.scrollLeft = 0 }
+  else if (rect.left < screenleft)
+    { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)) }
+  else if (rect.right > screenw + screenleft - 3)
+    { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw }
+  return result
+}
+
+// Store a relative adjustment to the scroll position in the current
+// operation (to be applied when the operation finishes).
+function addToScrollTop(cm, top) {
+  if (top == null) { return }
+  resolveScrollToPos(cm)
+  cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top
+}
+
+// Make sure that at the end of the operation the current cursor is
+// shown.
+function ensureCursorVisible(cm) {
+  resolveScrollToPos(cm)
+  var cur = cm.getCursor()
+  cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin}
+}
+
+function scrollToCoords(cm, x, y) {
+  if (x != null || y != null) { resolveScrollToPos(cm) }
+  if (x != null) { cm.curOp.scrollLeft = x }
+  if (y != null) { cm.curOp.scrollTop = y }
+}
+
+function scrollToRange(cm, range) {
+  resolveScrollToPos(cm)
+  cm.curOp.scrollToPos = range
+}
+
+// When an operation has its scrollToPos property set, and another
+// scroll action is applied before the end of the operation, this
+// 'simulates' scrolling that position into view in a cheap way, so
+// that the effect of intermediate scroll commands is not ignored.
+function resolveScrollToPos(cm) {
+  var range = cm.curOp.scrollToPos
+  if (range) {
+    cm.curOp.scrollToPos = null
+    var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to)
+    scrollToCoordsRange(cm, from, to, range.margin)
+  }
+}
+
+function scrollToCoordsRange(cm, from, to, margin) {
+  var sPos = calculateScrollPos(cm, {
+    left: Math.min(from.left, to.left),
+    top: Math.min(from.top, to.top) - margin,
+    right: Math.max(from.right, to.right),
+    bottom: Math.max(from.bottom, to.bottom) + margin
+  })
+  scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop)
+}
+
+// Sync the scrollable area and scrollbars, ensure the viewport
+// covers the visible area.
+function updateScrollTop(cm, val) {
+  if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+  if (!gecko) { updateDisplaySimple(cm, {top: val}) }
+  setScrollTop(cm, val, true)
+  if (gecko) { updateDisplaySimple(cm) }
+  startWorker(cm, 100)
+}
+
+function setScrollTop(cm, val, forceScroll) {
+  val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val)
+  if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+  cm.doc.scrollTop = val
+  cm.display.scrollbars.setScrollTop(val)
+  if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val }
+}
+
+// Sync scroller and scrollbar, ensure the gutter elements are
+// aligned.
+function setScrollLeft(cm, val, isScroller, forceScroll) {
+  val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth)
+  if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+  cm.doc.scrollLeft = val
+  alignHorizontally(cm)
+  if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val }
+  cm.display.scrollbars.setScrollLeft(val)
+}
+
+// SCROLLBARS
+
+// Prepare DOM reads needed to update the scrollbars. Done in one
+// shot to minimize update/measure roundtrips.
+function measureForScrollbars(cm) {
+  var d = cm.display, gutterW = d.gutters.offsetWidth
+  var docH = Math.round(cm.doc.height + paddingVert(cm.display))
+  return {
+    clientHeight: d.scroller.clientHeight,
+    viewHeight: d.wrapper.clientHeight,
+    scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+    viewWidth: d.wrapper.clientWidth,
+    barLeft: cm.options.fixedGutter ? gutterW : 0,
+    docHeight: docH,
+    scrollHeight: docH + scrollGap(cm) + d.barHeight,
+    nativeBarWidth: d.nativeBarWidth,
+    gutterWidth: gutterW
+  }
+}
+
+var NativeScrollbars = function(place, scroll, cm) {
+  this.cm = cm
+  var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar")
+  var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar")
+  place(vert); place(horiz)
+
+  on(vert, "scroll", function () {
+    if (vert.clientHeight) { scroll(vert.scrollTop, "vertical") }
+  })
+  on(horiz, "scroll", function () {
+    if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal") }
+  })
+
+  this.checkedZeroWidth = false
+  // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+  if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px" }
+};
+
+NativeScrollbars.prototype.update = function (measure) {
+  var needsH = measure.scrollWidth > measure.clientWidth + 1
+  var needsV = measure.scrollHeight > measure.clientHeight + 1
+  var sWidth = measure.nativeBarWidth
+
+  if (needsV) {
+    this.vert.style.display = "block"
+    this.vert.style.bottom = needsH ? sWidth + "px" : "0"
+    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0)
+    // A bug in IE8 can cause this value to be negative, so guard it.
+    this.vert.firstChild.style.height =
+      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"
+  } else {
+    this.vert.style.display = ""
+    this.vert.firstChild.style.height = "0"
+  }
+
+  if (needsH) {
+    this.horiz.style.display = "block"
+    this.horiz.style.right = needsV ? sWidth + "px" : "0"
+    this.horiz.style.left = measure.barLeft + "px"
+    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0)
+    this.horiz.firstChild.style.width =
+      Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px"
+  } else {
+    this.horiz.style.display = ""
+    this.horiz.firstChild.style.width = "0"
+  }
+
+  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+    if (sWidth == 0) { this.zeroWidthHack() }
+    this.checkedZeroWidth = true
+  }
+
+  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+};
+
+NativeScrollbars.prototype.setScrollLeft = function (pos) {
+  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos }
+  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz") }
+};
+
+NativeScrollbars.prototype.setScrollTop = function (pos) {
+  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos }
+  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert") }
+};
+
+NativeScrollbars.prototype.zeroWidthHack = function () {
+  var w = mac && !mac_geMountainLion ? "12px" : "18px"
+  this.horiz.style.height = this.vert.style.width = w
+  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"
+  this.disableHoriz = new Delayed
+  this.disableVert = new Delayed
+};
+
+NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+  bar.style.pointerEvents = "auto"
+  function maybeDisable() {
+    // To find out whether the scrollbar is still visible, we
+    // check whether the element under the pixel in the bottom
+    // right corner of the scrollbar box is the scrollbar box
+    // itself (when the bar is still visible) or its filler child
+    // (when the bar is hidden). If it is still visible, we keep
+    // it enabled, if it's hidden, we disable pointer events.
+    var box = bar.getBoundingClientRect()
+    var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+        : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1)
+    if (elt != bar) { bar.style.pointerEvents = "none" }
+    else { delay.set(1000, maybeDisable) }
+  }
+  delay.set(1000, maybeDisable)
+};
+
+NativeScrollbars.prototype.clear = function () {
+  var parent = this.horiz.parentNode
+  parent.removeChild(this.horiz)
+  parent.removeChild(this.vert)
+};
+
+var NullScrollbars = function () {};
+
+NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+NullScrollbars.prototype.setScrollLeft = function () {};
+NullScrollbars.prototype.setScrollTop = function () {};
+NullScrollbars.prototype.clear = function () {};
+
+function updateScrollbars(cm, measure) {
+  if (!measure) { measure = measureForScrollbars(cm) }
+  var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight
+  updateScrollbarsInner(cm, measure)
+  for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+    if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+      { updateHeightsInViewport(cm) }
+    updateScrollbarsInner(cm, measureForScrollbars(cm))
+    startWidth = cm.display.barWidth; startHeight = cm.display.barHeight
+  }
+}
+
+// Re-synchronize the fake scrollbars with the actual size of the
+// content.
+function updateScrollbarsInner(cm, measure) {
+  var d = cm.display
+  var sizes = d.scrollbars.update(measure)
+
+  d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"
+  d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"
+  d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
+
+  if (sizes.right && sizes.bottom) {
+    d.scrollbarFiller.style.display = "block"
+    d.scrollbarFiller.style.height = sizes.bottom + "px"
+    d.scrollbarFiller.style.width = sizes.right + "px"
+  } else { d.scrollbarFiller.style.display = "" }
+  if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+    d.gutterFiller.style.display = "block"
+    d.gutterFiller.style.height = sizes.bottom + "px"
+    d.gutterFiller.style.width = measure.gutterWidth + "px"
+  } else { d.gutterFiller.style.display = "" }
+}
+
+var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars}
+
+function initScrollbars(cm) {
+  if (cm.display.scrollbars) {
+    cm.display.scrollbars.clear()
+    if (cm.display.scrollbars.addClass)
+      { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+  }
+
+  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+    cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller)
+    // Prevent clicks in the scrollbars from killing focus
+    on(node, "mousedown", function () {
+      if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0) }
+    })
+    node.setAttribute("cm-not-content", "true")
+  }, function (pos, axis) {
+    if (axis == "horizontal") { setScrollLeft(cm, pos) }
+    else { updateScrollTop(cm, pos) }
+  }, cm)
+  if (cm.display.scrollbars.addClass)
+    { addClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
+}
+
+// Operations are used to wrap a series of changes to the editor
+// state in such a way that each change won't have to update the
+// cursor and display (which would be awkward, slow, and
+// error-prone). Instead, display updates are batched and then all
+// combined and executed at once.
+
+var nextOpId = 0
+// Start a new operation.
+function startOperation(cm) {
+  cm.curOp = {
+    cm: cm,
+    viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+    startHeight: cm.doc.height, // Used to detect need to update scrollbar
+    forceUpdate: false,      // Used to force a redraw
+    updateInput: null,       // Whether to reset the input textarea
+    typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+    changeObjs: null,        // Accumulated changes, for firing change events
+    cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+    cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+    selectionChanged: false, // Whether the selection needs to be redrawn
+    updateMaxLine: false,    // Set when the widest line needs to be determined anew
+    scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+    scrollToPos: null,       // Used to scroll to a specific position
+    focus: false,
+    id: ++nextOpId           // Unique ID
+  }
+  pushOperation(cm.curOp)
+}
+
+// Finish an operation, updating the display and signalling delayed events
+function endOperation(cm) {
+  var op = cm.curOp
+  finishOperation(op, function (group) {
+    for (var i = 0; i < group.ops.length; i++)
+      { group.ops[i].cm.curOp = null }
+    endOperations(group)
+  })
+}
+
+// The DOM updates done when an operation finishes are batched so
+// that the minimum number of relayouts are required.
+function endOperations(group) {
+  var ops = group.ops
+  for (var i = 0; i < ops.length; i++) // Read DOM
+    { endOperation_R1(ops[i]) }
+  for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+    { endOperation_W1(ops[i$1]) }
+  for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+    { endOperation_R2(ops[i$2]) }
+  for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+    { endOperation_W2(ops[i$3]) }
+  for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+    { endOperation_finish(ops[i$4]) }
+}
+
+function endOperation_R1(op) {
+  var cm = op.cm, display = cm.display
+  maybeClipScrollbars(cm)
+  if (op.updateMaxLine) { findMaxLine(cm) }
+
+  op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+    op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                       op.scrollToPos.to.line >= display.viewTo) ||
+    display.maxLineChanged && cm.options.lineWrapping
+  op.update = op.mustUpdate &&
+    new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate)
+}
+
+function endOperation_W1(op) {
+  op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update)
+}
+
+function endOperation_R2(op) {
+  var cm = op.cm, display = cm.display
+  if (op.updatedDisplay) { updateHeightsInViewport(cm) }
+
+  op.barMeasure = measureForScrollbars(cm)
+
+  // If the max line changed since it was last measured, measure it,
+  // and ensure the document's width matches it.
+  // updateDisplay_W2 will use these properties to do the actual resizing
+  if (display.maxLineChanged && !cm.options.lineWrapping) {
+    op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3
+    cm.display.sizerWidth = op.adjustWidthTo
+    op.barMeasure.scrollWidth =
+      Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth)
+    op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm))
+  }
+
+  if (op.updatedDisplay || op.selectionChanged)
+    { op.preparedSelection = display.input.prepareSelection(op.focus) }
+}
+
+function endOperation_W2(op) {
+  var cm = op.cm
+
+  if (op.adjustWidthTo != null) {
+    cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"
+    if (op.maxScrollLeft < cm.doc.scrollLeft)
+      { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true) }
+    cm.display.maxLineChanged = false
+  }
+
+  var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
+  if (op.preparedSelection)
+    { cm.display.input.showSelection(op.preparedSelection, takeFocus) }
+  if (op.updatedDisplay || op.startHeight != cm.doc.height)
+    { updateScrollbars(cm, op.barMeasure) }
+  if (op.updatedDisplay)
+    { setDocumentHeight(cm, op.barMeasure) }
+
+  if (op.selectionChanged) { restartBlink(cm) }
+
+  if (cm.state.focused && op.updateInput)
+    { cm.display.input.reset(op.typing) }
+  if (takeFocus) { ensureFocus(op.cm) }
+}
+
+function endOperation_finish(op) {
+  var cm = op.cm, display = cm.display, doc = cm.doc
+
+  if (op.updatedDisplay) { postUpdateDisplay(cm, op.update) }
+
+  // Abort mouse wheel delta measurement, when scrolling explicitly
+  if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+    { display.wheelStartX = display.wheelStartY = null }
+
+  // Propagate the scroll position to the actual DOM scroller
+  if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll) }
+
+  if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true) }
+  // If we need to scroll a specific position into view, do so.
+  if (op.scrollToPos) {
+    var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin)
+    maybeScrollWindow(cm, rect)
+  }
+
+  // Fire events for markers that are hidden/unidden by editing or
+  // undoing
+  var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers
+  if (hidden) { for (var i = 0; i < hidden.length; ++i)
+    { if (!hidden[i].lines.length) { signal(hidden[i], "hide") } } }
+  if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+    { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide") } } }
+
+  if (display.wrapper.offsetHeight)
+    { doc.scrollTop = cm.display.scroller.scrollTop }
+
+  // Fire change events, and delayed event handlers
+  if (op.changeObjs)
+    { signal(cm, "changes", cm, op.changeObjs) }
+  if (op.update)
+    { op.update.finish() }
+}
+
+// Run the given function in an operation
+function runInOp(cm, f) {
+  if (cm.curOp) { return f() }
+  startOperation(cm)
+  try { return f() }
+  finally { endOperation(cm) }
+}
+// Wraps a function in an operation. Returns the wrapped function.
+function operation(cm, f) {
+  return function() {
+    if (cm.curOp) { return f.apply(cm, arguments) }
+    startOperation(cm)
+    try { return f.apply(cm, arguments) }
+    finally { endOperation(cm) }
+  }
+}
+// Used to add methods to editor and doc instances, wrapping them in
+// operations.
+function methodOp(f) {
+  return function() {
+    if (this.curOp) { return f.apply(this, arguments) }
+    startOperation(this)
+    try { return f.apply(this, arguments) }
+    finally { endOperation(this) }
+  }
+}
+function docMethodOp(f) {
+  return function() {
+    var cm = this.cm
+    if (!cm || cm.curOp) { return f.apply(this, arguments) }
+    startOperation(cm)
+    try { return f.apply(this, arguments) }
+    finally { endOperation(cm) }
+  }
+}
+
+// Updates the display.view data structure for a given change to the
+// document. From and to are in pre-change coordinates. Lendiff is
+// the amount of lines added or subtracted by the change. This is
+// used for changes that span multiple lines, or change the way
+// lines are divided into visual lines. regLineChange (below)
+// registers single-line changes.
+function regChange(cm, from, to, lendiff) {
+  if (from == null) { from = cm.doc.first }
+  if (to == null) { to = cm.doc.first + cm.doc.size }
+  if (!lendiff) { lendiff = 0 }
+
+  var display = cm.display
+  if (lendiff && to < display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers > from))
+    { display.updateLineNumbers = from }
+
+  cm.curOp.viewChanged = true
+
+  if (from >= display.viewTo) { // Change after
+    if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+      { resetView(cm) }
+  } else if (to <= display.viewFrom) { // Change before
+    if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+      resetView(cm)
+    } else {
+      display.viewFrom += lendiff
+      display.viewTo += lendiff
+    }
+  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+    resetView(cm)
+  } else if (from <= display.viewFrom) { // Top overlap
+    var cut = viewCuttingPoint(cm, to, to + lendiff, 1)
+    if (cut) {
+      display.view = display.view.slice(cut.index)
+      display.viewFrom = cut.lineN
+      display.viewTo += lendiff
+    } else {
+      resetView(cm)
+    }
+  } else if (to >= display.viewTo) { // Bottom overlap
+    var cut$1 = viewCuttingPoint(cm, from, from, -1)
+    if (cut$1) {
+      display.view = display.view.slice(0, cut$1.index)
+      display.viewTo = cut$1.lineN
+    } else {
+      resetView(cm)
+    }
+  } else { // Gap in the middle
+    var cutTop = viewCuttingPoint(cm, from, from, -1)
+    var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1)
+    if (cutTop && cutBot) {
+      display.view = display.view.slice(0, cutTop.index)
+        .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+        .concat(display.view.slice(cutBot.index))
+      display.viewTo += lendiff
+    } else {
+      resetView(cm)
+    }
+  }
+
+  var ext = display.externalMeasured
+  if (ext) {
+    if (to < ext.lineN)
+      { ext.lineN += lendiff }
+    else if (from < ext.lineN + ext.size)
+      { display.externalMeasured = null }
+  }
+}
+
+// Register a change to a single line. Type must be one of "text",
+// "gutter", "class", "widget"
+function regLineChange(cm, line, type) {
+  cm.curOp.viewChanged = true
+  var display = cm.display, ext = cm.display.externalMeasured
+  if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+    { display.externalMeasured = null }
+
+  if (line < display.viewFrom || line >= display.viewTo) { return }
+  var lineView = display.view[findViewIndex(cm, line)]
+  if (lineView.node == null) { return }
+  var arr = lineView.changes || (lineView.changes = [])
+  if (indexOf(arr, type) == -1) { arr.push(type) }
+}
+
+// Clear the view.
+function resetView(cm) {
+  cm.display.viewFrom = cm.display.viewTo = cm.doc.first
+  cm.display.view = []
+  cm.display.viewOffset = 0
+}
+
+function viewCuttingPoint(cm, oldN, newN, dir) {
+  var index = findViewIndex(cm, oldN), diff, view = cm.display.view
+  if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+    { return {index: index, lineN: newN} }
+  var n = cm.display.viewFrom
+  for (var i = 0; i < index; i++)
+    { n += view[i].size }
+  if (n != oldN) {
+    if (dir > 0) {
+      if (index == view.length - 1) { return null }
+      diff = (n + view[index].size) - oldN
+      index++
+    } else {
+      diff = n - oldN
+    }
+    oldN += diff; newN += diff
+  }
+  while (visualLineNo(cm.doc, newN) != newN) {
+    if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+    newN += dir * view[index - (dir < 0 ? 1 : 0)].size
+    index += dir
+  }
+  return {index: index, lineN: newN}
+}
+
+// Force the view to cover a given range, adding empty view element
+// or clipping off existing ones as needed.
+function adjustView(cm, from, to) {
+  var display = cm.display, view = display.view
+  if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+    display.view = buildViewArray(cm, from, to)
+    display.viewFrom = from
+  } else {
+    if (display.viewFrom > from)
+      { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view) }
+    else if (display.viewFrom < from)
+      { display.view = display.view.slice(findViewIndex(cm, from)) }
+    display.viewFrom = from
+    if (display.viewTo < to)
+      { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)) }
+    else if (display.viewTo > to)
+      { display.view = display.view.slice(0, findViewIndex(cm, to)) }
+  }
+  display.viewTo = to
+}
+
+// Count the number of lines in the view whose DOM representation is
+// out of date (or nonexistent).
+function countDirtyView(cm) {
+  var view = cm.display.view, dirty = 0
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i]
+    if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty }
+  }
+  return dirty
+}
+
+// HIGHLIGHT WORKER
+
+function startWorker(cm, time) {
+  if (cm.doc.highlightFrontier < cm.display.viewTo)
+    { cm.state.highlight.set(time, bind(highlightWorker, cm)) }
+}
+
+function highlightWorker(cm) {
+  var doc = cm.doc
+  if (doc.highlightFrontier >= cm.display.viewTo) { return }
+  var end = +new Date + cm.options.workTime
+  var context = getContextBefore(cm, doc.highlightFrontier)
+  var changedLines = []
+
+  doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+    if (context.line >= cm.display.viewFrom) { // Visible
+      var oldStyles = line.styles
+      var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
+      var highlighted = highlightLine(cm, line, context, true)
+      if (resetState) { context.state = resetState }
+      line.styles = highlighted.styles
+      var oldCls = line.styleClasses, newCls = highlighted.classes
+      if (newCls) { line.styleClasses = newCls }
+      else if (oldCls) { line.styleClasses = null }
+      var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+        oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
+      for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i] }
+      if (ischange) { changedLines.push(context.line) }
+      line.stateAfter = context.save()
+      context.nextLine()
+    } else {
+      if (line.text.length <= cm.options.maxHighlightLength)
+        { processLine(cm, line.text, context) }
+      line.stateAfter = context.line % 5 == 0 ? context.save() : null
+      context.nextLine()
+    }
+    if (+new Date > end) {
+      startWorker(cm, cm.options.workDelay)
+      return true
+    }
+  })
+  doc.highlightFrontier = context.line
+  doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
+  if (changedLines.length) { runInOp(cm, function () {
+    for (var i = 0; i < changedLines.length; i++)
+      { regLineChange(cm, changedLines[i], "text") }
+  }) }
+}
+
+// DISPLAY DRAWING
+
+var DisplayUpdate = function(cm, viewport, force) {
+  var display = cm.display
+
+  this.viewport = viewport
+  // Store some values that we'll need later (but don't want to force a relayout for)
+  this.visible = visibleLines(display, cm.doc, viewport)
+  this.editorIsHidden = !display.wrapper.offsetWidth
+  this.wrapperHeight = display.wrapper.clientHeight
+  this.wrapperWidth = display.wrapper.clientWidth
+  this.oldDisplayWidth = displayWidth(cm)
+  this.force = force
+  this.dims = getDimensions(cm)
+  this.events = []
+};
+
+DisplayUpdate.prototype.signal = function (emitter, type) {
+  if (hasHandler(emitter, type))
+    { this.events.push(arguments) }
+};
+DisplayUpdate.prototype.finish = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.events.length; i++)
+    { signal.apply(null, this$1.events[i]) }
+};
+
+function maybeClipScrollbars(cm) {
+  var display = cm.display
+  if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+    display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth
+    display.heightForcer.style.height = scrollGap(cm) + "px"
+    display.sizer.style.marginBottom = -display.nativeBarWidth + "px"
+    display.sizer.style.borderRightWidth = scrollGap(cm) + "px"
+    display.scrollbarsClipped = true
+  }
+}
+
+function selectionSnapshot(cm) {
+  if (cm.hasFocus()) { return null }
+  var active = activeElt()
+  if (!active || !contains(cm.display.lineDiv, active)) { return null }
+  var result = {activeElt: active}
+  if (window.getSelection) {
+    var sel = window.getSelection()
+    if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+      result.anchorNode = sel.anchorNode
+      result.anchorOffset = sel.anchorOffset
+      result.focusNode = sel.focusNode
+      result.focusOffset = sel.focusOffset
+    }
+  }
+  return result
+}
+
+function restoreSelection(snapshot) {
+  if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+  snapshot.activeElt.focus()
+  if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+    var sel = window.getSelection(), range = document.createRange()
+    range.setEnd(snapshot.anchorNode, snapshot.anchorOffset)
+    range.collapse(false)
+    sel.removeAllRanges()
+    sel.addRange(range)
+    sel.extend(snapshot.focusNode, snapshot.focusOffset)
+  }
+}
+
+// Does the actual updating of the line display. Bails out
+// (returning false) when there is nothing to be done and forced is
+// false.
+function updateDisplayIfNeeded(cm, update) {
+  var display = cm.display, doc = cm.doc
+
+  if (update.editorIsHidden) {
+    resetView(cm)
+    return false
+  }
+
+  // Bail out if the visible area is already rendered and nothing changed.
+  if (!update.force &&
+      update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+      display.renderedView == display.view && countDirtyView(cm) == 0)
+    { return false }
+
+  if (maybeUpdateLineNumberWidth(cm)) {
+    resetView(cm)
+    update.dims = getDimensions(cm)
+  }
+
+  // Compute a suitable new viewport (from & to)
+  var end = doc.first + doc.size
+  var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first)
+  var to = Math.min(end, update.visible.to + cm.options.viewportMargin)
+  if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom) }
+  if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo) }
+  if (sawCollapsedSpans) {
+    from = visualLineNo(cm.doc, from)
+    to = visualLineEndNo(cm.doc, to)
+  }
+
+  var different = from != display.viewFrom || to != display.viewTo ||
+    display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth
+  adjustView(cm, from, to)
+
+  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom))
+  // Position the mover div to align with the current scroll position
+  cm.display.mover.style.top = display.viewOffset + "px"
+
+  var toUpdate = countDirtyView(cm)
+  if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+      (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+    { return false }
+
+  // For big changes, we hide the enclosing element during the
+  // update, since that speeds up the operations on most browsers.
+  var selSnapshot = selectionSnapshot(cm)
+  if (toUpdate > 4) { display.lineDiv.style.display = "none" }
+  patchDisplay(cm, display.updateLineNumbers, update.dims)
+  if (toUpdate > 4) { display.lineDiv.style.display = "" }
+  display.renderedView = display.view
+  // There might have been a widget with a focused element that got
+  // hidden or updated, if so re-focus it.
+  restoreSelection(selSnapshot)
+
+  // Prevent selection and cursors from interfering with the scroll
+  // width and height.
+  removeChildren(display.cursorDiv)
+  removeChildren(display.selectionDiv)
+  display.gutters.style.height = display.sizer.style.minHeight = 0
+
+  if (different) {
+    display.lastWrapHeight = update.wrapperHeight
+    display.lastWrapWidth = update.wrapperWidth
+    startWorker(cm, 400)
+  }
+
+  display.updateLineNumbers = null
+
+  return true
+}
+
+function postUpdateDisplay(cm, update) {
+  var viewport = update.viewport
+
+  for (var first = true;; first = false) {
+    if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+      // Clip forced viewport to actual scrollable area.
+      if (viewport && viewport.top != null)
+        { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)} }
+      // Updated line heights might result in the drawn area not
+      // actually covering the viewport. Keep looping until it does.
+      update.visible = visibleLines(cm.display, cm.doc, viewport)
+      if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+        { break }
+    }
+    if (!updateDisplayIfNeeded(cm, update)) { break }
+    updateHeightsInViewport(cm)
+    var barMeasure = measureForScrollbars(cm)
+    updateSelection(cm)
+    updateScrollbars(cm, barMeasure)
+    setDocumentHeight(cm, barMeasure)
+    update.force = false
+  }
+
+  update.signal(cm, "update", cm)
+  if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+    update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo)
+    cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo
+  }
+}
+
+function updateDisplaySimple(cm, viewport) {
+  var update = new DisplayUpdate(cm, viewport)
+  if (updateDisplayIfNeeded(cm, update)) {
+    updateHeightsInViewport(cm)
+    postUpdateDisplay(cm, update)
+    var barMeasure = measureForScrollbars(cm)
+    updateSelection(cm)
+    updateScrollbars(cm, barMeasure)
+    setDocumentHeight(cm, barMeasure)
+    update.finish()
+  }
+}
+
+// Sync the actual display DOM structure with display.view, removing
+// nodes for lines that are no longer in view, and creating the ones
+// that are not there yet, and updating the ones that are out of
+// date.
+function patchDisplay(cm, updateNumbersFrom, dims) {
+  var display = cm.display, lineNumbers = cm.options.lineNumbers
+  var container = display.lineDiv, cur = container.firstChild
+
+  function rm(node) {
+    var next = node.nextSibling
+    // Works around a throw-scroll bug in OS X Webkit
+    if (webkit && mac && cm.display.currentWheelTarget == node)
+      { node.style.display = "none" }
+    else
+      { node.parentNode.removeChild(node) }
+    return next
+  }
+
+  var view = display.view, lineN = display.viewFrom
+  // Loop over the elements in the view, syncing cur (the DOM nodes
+  // in display.lineDiv) with the view as we go.
+  for (var i = 0; i < view.length; i++) {
+    var lineView = view[i]
+    if (lineView.hidden) {
+    } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+      var node = buildLineElement(cm, lineView, lineN, dims)
+      container.insertBefore(node, cur)
+    } else { // Already drawn
+      while (cur != lineView.node) { cur = rm(cur) }
+      var updateNumber = lineNumbers && updateNumbersFrom != null &&
+        updateNumbersFrom <= lineN && lineView.lineNumber
+      if (lineView.changes) {
+        if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false }
+        updateLineForChanges(cm, lineView, lineN, dims)
+      }
+      if (updateNumber) {
+        removeChildren(lineView.lineNumber)
+        lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)))
+      }
+      cur = lineView.node.nextSibling
+    }
+    lineN += lineView.size
+  }
+  while (cur) { cur = rm(cur) }
+}
+
+function updateGutterSpace(cm) {
+  var width = cm.display.gutters.offsetWidth
+  cm.display.sizer.style.marginLeft = width + "px"
+}
+
+function setDocumentHeight(cm, measure) {
+  cm.display.sizer.style.minHeight = measure.docHeight + "px"
+  cm.display.heightForcer.style.top = measure.docHeight + "px"
+  cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"
+}
+
+// Rebuild the gutter elements, ensure the margin to the left of the
+// code matches their width.
+function updateGutters(cm) {
+  var gutters = cm.display.gutters, specs = cm.options.gutters
+  removeChildren(gutters)
+  var i = 0
+  for (; i < specs.length; ++i) {
+    var gutterClass = specs[i]
+    var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass))
+    if (gutterClass == "CodeMirror-linenumbers") {
+      cm.display.lineGutter = gElt
+      gElt.style.width = (cm.display.lineNumWidth || 1) + "px"
+    }
+  }
+  gutters.style.display = i ? "" : "none"
+  updateGutterSpace(cm)
+}
+
+// Make sure the gutters options contains the element
+// "CodeMirror-linenumbers" when the lineNumbers option is true.
+function setGuttersForLineNumbers(options) {
+  var found = indexOf(options.gutters, "CodeMirror-linenumbers")
+  if (found == -1 && options.lineNumbers) {
+    options.gutters = options.gutters.concat(["CodeMirror-linenumbers"])
+  } else if (found > -1 && !options.lineNumbers) {
+    options.gutters = options.gutters.slice(0)
+    options.gutters.splice(found, 1)
+  }
+}
+
+var wheelSamples = 0;
+var wheelPixelsPerUnit = null;
+// Fill in a browser-detected starting value on browsers where we
+// know one. These don't have to be accurate -- the result of them
+// being wrong would just be a slight flicker on the first wheel
+// scroll (if it is large enough).
+if (ie) { wheelPixelsPerUnit = -.53 }
+else if (gecko) { wheelPixelsPerUnit = 15 }
+else if (chrome) { wheelPixelsPerUnit = -.7 }
+else if (safari) { wheelPixelsPerUnit = -1/3 }
+
+function wheelEventDelta(e) {
+  var dx = e.wheelDeltaX, dy = e.wheelDeltaY
+  if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail }
+  if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail }
+  else if (dy == null) { dy = e.wheelDelta }
+  return {x: dx, y: dy}
+}
+function wheelEventPixels(e) {
+  var delta = wheelEventDelta(e)
+  delta.x *= wheelPixelsPerUnit
+  delta.y *= wheelPixelsPerUnit
+  return delta
+}
+
+function onScrollWheel(cm, e) {
+  var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y
+
+  var display = cm.display, scroll = display.scroller
+  // Quit if there's nothing to scroll here
+  var canScrollX = scroll.scrollWidth > scroll.clientWidth
+  var canScrollY = scroll.scrollHeight > scroll.clientHeight
+  if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+  // Webkit browsers on OS X abort momentum scrolls when the target
+  // of the scroll event is removed from the scrollable element.
+  // This hack (see related code in patchDisplay) makes sure the
+  // element is kept around.
+  if (dy && mac && webkit) {
+    outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+      for (var i = 0; i < view.length; i++) {
+        if (view[i].node == cur) {
+          cm.display.currentWheelTarget = cur
+          break outer
         }
       }
-      on(div, "copy", onCopyCut);
-      on(div, "cut", onCopyCut);
-    },
-
-    prepareSelection: function() {
-      var result = prepareSelection(this.cm, false);
-      result.focus = this.cm.state.focused;
-      return result;
-    },
-
-    showSelection: function(info, takeFocus) {
-      if (!info || !this.cm.display.view.length) return;
-      if (info.focus || takeFocus) this.showPrimarySelection();
-      this.showMultipleSelections(info);
-    },
-
-    showPrimarySelection: function() {
-      var sel = window.getSelection(), prim = this.cm.doc.sel.primary();
-      var curAnchor = domToPos(this.cm, sel.anchorNode, sel.anchorOffset);
-      var curFocus = domToPos(this.cm, sel.focusNode, sel.focusOffset);
-      if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
-          cmp(minPos(curAnchor, curFocus), prim.from()) == 0 &&
-          cmp(maxPos(curAnchor, curFocus), prim.to()) == 0)
-        return;
-
-      var start = posToDOM(this.cm, prim.from());
-      var end = posToDOM(this.cm, prim.to());
-      if (!start && !end) return;
-
-      var view = this.cm.display.view;
-      var old = sel.rangeCount && sel.getRangeAt(0);
-      if (!start) {
-        start = {node: view[0].measure.map[2], offset: 0};
-      } else if (!end) { // FIXME dangerously hacky
-        var measure = view[view.length - 1].measure;
-        var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
-        end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
+    }
+  }
+
+  // On some browsers, horizontal scrolling will cause redraws to
+  // happen before the gutter has been realigned, causing it to
+  // wriggle around in a most unseemly way. When we have an
+  // estimated pixels/delta value, we just handle horizontal
+  // scrolling entirely here. It'll be slightly off from native, but
+  // better than glitching out.
+  if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+    if (dy && canScrollY)
+      { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)) }
+    setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit))
+    // Only prevent default scrolling if vertical scrolling is
+    // actually possible. Otherwise, it causes vertical scroll
+    // jitter on OSX trackpads when deltaX is small and deltaY
+    // is large (issue #3579)
+    if (!dy || (dy && canScrollY))
+      { e_preventDefault(e) }
+    display.wheelStartX = null // Abort measurement, if in progress
+    return
+  }
+
+  // 'Project' the visible viewport to cover the area that is being
+  // scrolled into view (if we know enough to estimate it).
+  if (dy && wheelPixelsPerUnit != null) {
+    var pixels = dy * wheelPixelsPerUnit
+    var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight
+    if (pixels < 0) { top = Math.max(0, top + pixels - 50) }
+    else { bot = Math.min(cm.doc.height, bot + pixels + 50) }
+    updateDisplaySimple(cm, {top: top, bottom: bot})
+  }
+
+  if (wheelSamples < 20) {
+    if (display.wheelStartX == null) {
+      display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop
+      display.wheelDX = dx; display.wheelDY = dy
+      setTimeout(function () {
+        if (display.wheelStartX == null) { return }
+        var movedX = scroll.scrollLeft - display.wheelStartX
+        var movedY = scroll.scrollTop - display.wheelStartY
+        var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+          (movedX && display.wheelDX && movedX / display.wheelDX)
+        display.wheelStartX = display.wheelStartY = null
+        if (!sample) { return }
+        wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1)
+        ++wheelSamples
+      }, 200)
+    } else {
+      display.wheelDX += dx; display.wheelDY += dy
+    }
+  }
+}
+
+// Selection objects are immutable. A new one is created every time
+// the selection changes. A selection is one or more non-overlapping
+// (and non-touching) ranges, sorted, and an integer that indicates
+// which one is the primary selection (the one that's scrolled into
+// view, that getCursor returns, etc).
+var Selection = function(ranges, primIndex) {
+  this.ranges = ranges
+  this.primIndex = primIndex
+};
+
+Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+Selection.prototype.equals = function (other) {
+    var this$1 = this;
+
+  if (other == this) { return true }
+  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var here = this$1.ranges[i], there = other.ranges[i]
+    if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+  }
+  return true
+};
+
+Selection.prototype.deepCopy = function () {
+    var this$1 = this;
+
+  var out = []
+  for (var i = 0; i < this.ranges.length; i++)
+    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)) }
+  return new Selection(out, this.primIndex)
+};
+
+Selection.prototype.somethingSelected = function () {
+    var this$1 = this;
+
+  for (var i = 0; i < this.ranges.length; i++)
+    { if (!this$1.ranges[i].empty()) { return true } }
+  return false
+};
+
+Selection.prototype.contains = function (pos, end) {
+    var this$1 = this;
+
+  if (!end) { end = pos }
+  for (var i = 0; i < this.ranges.length; i++) {
+    var range = this$1.ranges[i]
+    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+      { return i }
+  }
+  return -1
+};
+
+var Range = function(anchor, head) {
+  this.anchor = anchor; this.head = head
+};
+
+Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+// Take an unsorted, potentially overlapping set of ranges, and
+// build a selection out of it. 'Consumes' ranges array (modifying
+// it).
+function normalizeSelection(ranges, primIndex) {
+  var prim = ranges[primIndex]
+  ranges.sort(function (a, b) { return cmp(a.from(), b.from()); })
+  primIndex = indexOf(ranges, prim)
+  for (var i = 1; i < ranges.length; i++) {
+    var cur = ranges[i], prev = ranges[i - 1]
+    if (cmp(prev.to(), cur.from()) >= 0) {
+      var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to())
+      var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head
+      if (i <= primIndex) { --primIndex }
+      ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to))
+    }
+  }
+  return new Selection(ranges, primIndex)
+}
+
+function simpleSelection(anchor, head) {
+  return new Selection([new Range(anchor, head || anchor)], 0)
+}
+
+// Compute the position of the end of a change (its 'to' property
+// refers to the pre-change end).
+function changeEnd(change) {
+  if (!change.text) { return change.to }
+  return Pos(change.from.line + change.text.length - 1,
+             lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+}
+
+// Adjust a position to refer to the post-change position of the
+// same text, or the end of the change if the change covers it.
+function adjustForChange(pos, change) {
+  if (cmp(pos, change.from) < 0) { return pos }
+  if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch
+  if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch }
+  return Pos(line, ch)
+}
+
+function computeSelAfterChange(doc, change) {
+  var out = []
+  for (var i = 0; i < doc.sel.ranges.length; i++) {
+    var range = doc.sel.ranges[i]
+    out.push(new Range(adjustForChange(range.anchor, change),
+                       adjustForChange(range.head, change)))
+  }
+  return normalizeSelection(out, doc.sel.primIndex)
+}
+
+function offsetPos(pos, old, nw) {
+  if (pos.line == old.line)
+    { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+  else
+    { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+}
+
+// Used by replaceSelections to allow moving the selection to the
+// start or around the replaced test. Hint may be "start" or "around".
+function computeReplacedSel(doc, changes, hint) {
+  var out = []
+  var oldPrev = Pos(doc.first, 0), newPrev = oldPrev
+  for (var i = 0; i < changes.length; i++) {
+    var change = changes[i]
+    var from = offsetPos(change.from, oldPrev, newPrev)
+    var to = offsetPos(changeEnd(change), oldPrev, newPrev)
+    oldPrev = change.to
+    newPrev = to
+    if (hint == "around") {
+      var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0
+      out[i] = new Range(inv ? to : from, inv ? from : to)
+    } else {
+      out[i] = new Range(from, from)
+    }
+  }
+  return new Selection(out, doc.sel.primIndex)
+}
+
+// Used to get the editor into a consistent state again when options change.
+
+function loadMode(cm) {
+  cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
+  resetModeState(cm)
+}
+
+function resetModeState(cm) {
+  cm.doc.iter(function (line) {
+    if (line.stateAfter) { line.stateAfter = null }
+    if (line.styles) { line.styles = null }
+  })
+  cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first
+  startWorker(cm, 100)
+  cm.state.modeGen++
+  if (cm.curOp) { regChange(cm) }
+}
+
+// DOCUMENT DATA STRUCTURE
+
+// By default, updates that start and end at the beginning of a line
+// are treated specially, in order to make the association of line
+// widgets and marker elements with the text behave more intuitive.
+function isWholeLineUpdate(doc, change) {
+  return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+    (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+}
+
+// Perform a change on the document data structure.
+function updateDoc(doc, change, markedSpans, estimateHeight) {
+  function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+  function update(line, text, spans) {
+    updateLine(line, text, spans, estimateHeight)
+    signalLater(line, "change", line, change)
+  }
+  function linesFor(start, end) {
+    var result = []
+    for (var i = start; i < end; ++i)
+      { result.push(new Line(text[i], spansFor(i), estimateHeight)) }
+    return result
+  }
+
+  var from = change.from, to = change.to, text = change.text
+  var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
+  var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line
+
+  // Adjust the line structure
+  if (change.full) {
+    doc.insert(0, linesFor(0, text.length))
+    doc.remove(text.length, doc.size - text.length)
+  } else if (isWholeLineUpdate(doc, change)) {
+    // This is a whole-line replace. Treated specially to make
+    // sure line objects move the way they are supposed to.
+    var added = linesFor(0, text.length - 1)
+    update(lastLine, lastLine.text, lastSpans)
+    if (nlines) { doc.remove(from.line, nlines) }
+    if (added.length) { doc.insert(from.line, added) }
+  } else if (firstLine == lastLine) {
+    if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
+    } else {
+      var added$1 = linesFor(1, text.length - 1)
+      added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight))
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+      doc.insert(from.line + 1, added$1)
+    }
+  } else if (text.length == 1) {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
+    doc.remove(from.line + 1, nlines)
+  } else {
+    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
+    update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
+    var added$2 = linesFor(1, text.length - 1)
+    if (nlines > 1) { doc.remove(from.line + 1, nlines - 1) }
+    doc.insert(from.line + 1, added$2)
+  }
+
+  signalLater(doc, "change", doc, change)
+}
+
+// Call f for all linked documents.
+function linkedDocs(doc, f, sharedHistOnly) {
+  function propagate(doc, skip, sharedHist) {
+    if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+      var rel = doc.linked[i]
+      if (rel.doc == skip) { continue }
+      var shared = sharedHist && rel.sharedHist
+      if (sharedHistOnly && !shared) { continue }
+      f(rel.doc, shared)
+      propagate(rel.doc, doc, shared)
+    } }
+  }
+  propagate(doc, null, true)
+}
+
+// Attach a document to an editor.
+function attachDoc(cm, doc) {
+  if (doc.cm) { throw new Error("This document is already in use.") }
+  cm.doc = doc
+  doc.cm = cm
+  estimateLineHeights(cm)
+  loadMode(cm)
+  setDirectionClass(cm)
+  if (!cm.options.lineWrapping) { findMaxLine(cm) }
+  cm.options.mode = doc.modeOption
+  regChange(cm)
+}
+
+function setDirectionClass(cm) {
+  ;(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl")
+}
+
+function directionChanged(cm) {
+  runInOp(cm, function () {
+    setDirectionClass(cm)
+    regChange(cm)
+  })
+}
+
+function History(startGen) {
+  // Arrays of change events and selections. Doing something adds an
+  // event to done and clears undo. Undoing moves events from done
+  // to undone, redoing moves them in the other direction.
+  this.done = []; this.undone = []
+  this.undoDepth = Infinity
+  // Used to track when changes can be merged into a single undo
+  // event
+  this.lastModTime = this.lastSelTime = 0
+  this.lastOp = this.lastSelOp = null
+  this.lastOrigin = this.lastSelOrigin = null
+  // Used by the isClean() method
+  this.generation = this.maxGeneration = startGen || 1
+}
+
+// Create a history change event from an updateDoc-style change
+// object.
+function historyChangeFromChange(doc, change) {
+  var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}
+  attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1)
+  linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true)
+  return histChange
+}
+
+// Pop all selection events off the end of a history array. Stop at
+// a change event.
+function clearSelectionEvents(array) {
+  while (array.length) {
+    var last = lst(array)
+    if (last.ranges) { array.pop() }
+    else { break }
+  }
+}
+
+// Find the top change event in the history. Pop off selection
+// events that are in the way.
+function lastChangeEvent(hist, force) {
+  if (force) {
+    clearSelectionEvents(hist.done)
+    return lst(hist.done)
+  } else if (hist.done.length && !lst(hist.done).ranges) {
+    return lst(hist.done)
+  } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+    hist.done.pop()
+    return lst(hist.done)
+  }
+}
+
+// Register a change in the history. Merges changes that are within
+// a single operation, or are close together with an origin that
+// allows merging (starting with "+") into a single event.
+function addChangeToHistory(doc, change, selAfter, opId) {
+  var hist = doc.history
+  hist.undone.length = 0
+  var time = +new Date, cur
+  var last
+
+  if ((hist.lastOp == opId ||
+       hist.lastOrigin == change.origin && change.origin &&
+       ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
+        change.origin.charAt(0) == "*")) &&
+      (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+    // Merge this change into the last event
+    last = lst(cur.changes)
+    if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+      // Optimized case for simple insertion -- don't want to add
+      // new changesets for every character typed
+      last.to = changeEnd(change)
+    } else {
+      // Add new sub-event
+      cur.changes.push(historyChangeFromChange(doc, change))
+    }
+  } else {
+    // Can not be merged, start a new event.
+    var before = lst(hist.done)
+    if (!before || !before.ranges)
+      { pushSelectionToHistory(doc.sel, hist.done) }
+    cur = {changes: [historyChangeFromChange(doc, change)],
+           generation: hist.generation}
+    hist.done.push(cur)
+    while (hist.done.length > hist.undoDepth) {
+      hist.done.shift()
+      if (!hist.done[0].ranges) { hist.done.shift() }
+    }
+  }
+  hist.done.push(selAfter)
+  hist.generation = ++hist.maxGeneration
+  hist.lastModTime = hist.lastSelTime = time
+  hist.lastOp = hist.lastSelOp = opId
+  hist.lastOrigin = hist.lastSelOrigin = change.origin
+
+  if (!last) { signal(doc, "historyAdded") }
+}
+
+function selectionEventCanBeMerged(doc, origin, prev, sel) {
+  var ch = origin.charAt(0)
+  return ch == "*" ||
+    ch == "+" &&
+    prev.ranges.length == sel.ranges.length &&
+    prev.somethingSelected() == sel.somethingSelected() &&
+    new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+}
+
+// Called whenever the selection changes, sets the new selection as
+// the pending selection in the history, and pushes the old pending
+// selection into the 'done' array when it was significantly
+// different (in number of selected ranges, emptiness, or time).
+function addSelectionToHistory(doc, sel, opId, options) {
+  var hist = doc.history, origin = options && options.origin
+
+  // A new event is started when the previous origin does not match
+  // the current, or the origins don't allow matching. Origins
+  // starting with * are always merged, those starting with + are
+  // merged when similar and close together in time.
+  if (opId == hist.lastSelOp ||
+      (origin && hist.lastSelOrigin == origin &&
+       (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+        selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+    { hist.done[hist.done.length - 1] = sel }
+  else
+    { pushSelectionToHistory(sel, hist.done) }
+
+  hist.lastSelTime = +new Date
+  hist.lastSelOrigin = origin
+  hist.lastSelOp = opId
+  if (options && options.clearRedo !== false)
+    { clearSelectionEvents(hist.undone) }
+}
+
+function pushSelectionToHistory(sel, dest) {
+  var top = lst(dest)
+  if (!(top && top.ranges && top.equals(sel)))
+    { dest.push(sel) }
+}
+
+// Used to store marked span information in the history.
+function attachLocalSpans(doc, change, from, to) {
+  var existing = change["spans_" + doc.id], n = 0
+  doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+    if (line.markedSpans)
+      { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans }
+    ++n
+  })
+}
+
+// When un/re-doing restores text containing marked spans, those
+// that have been explicitly cleared should not be restored.
+function removeClearedSpans(spans) {
+  if (!spans) { return null }
+  var out
+  for (var i = 0; i < spans.length; ++i) {
+    if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i) } }
+    else if (out) { out.push(spans[i]) }
+  }
+  return !out ? spans : out.length ? out : null
+}
+
+// Retrieve and filter the old marked spans stored in a change event.
+function getOldSpans(doc, change) {
+  var found = change["spans_" + doc.id]
+  if (!found) { return null }
+  var nw = []
+  for (var i = 0; i < change.text.length; ++i)
+    { nw.push(removeClearedSpans(found[i])) }
+  return nw
+}
+
+// Used for un/re-doing changes from the history. Combines the
+// result of computing the existing spans with the set of spans that
+// existed in the history (so that deleting around a span and then
+// undoing brings back the span).
+function mergeOldSpans(doc, change) {
+  var old = getOldSpans(doc, change)
+  var stretched = stretchSpansOverChange(doc, change)
+  if (!old) { return stretched }
+  if (!stretched) { return old }
+
+  for (var i = 0; i < old.length; ++i) {
+    var oldCur = old[i], stretchCur = stretched[i]
+    if (oldCur && stretchCur) {
+      spans: for (var j = 0; j < stretchCur.length; ++j) {
+        var span = stretchCur[j]
+        for (var k = 0; k < oldCur.length; ++k)
+          { if (oldCur[k].marker == span.marker) { continue spans } }
+        oldCur.push(span)
       }
-
-      try { var rng = range(start.node, start.offset, end.offset, end.node); }
-      catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
-      if (rng) {
-        if (!gecko && this.cm.state.focused) {
-          sel.collapse(start.node, start.offset);
-          if (!rng.collapsed) sel.addRange(rng);
-        } else {
-          sel.removeAllRanges();
-          sel.addRange(rng);
+    } else if (stretchCur) {
+      old[i] = stretchCur
+    }
+  }
+  return old
+}
+
+// Used both to provide a JSON-safe object in .getHistory, and, when
+// detaching a document, to split the history in two
+function copyHistoryArray(events, newGroup, instantiateSel) {
+  var copy = []
+  for (var i = 0; i < events.length; ++i) {
+    var event = events[i]
+    if (event.ranges) {
+      copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event)
+      continue
+    }
+    var changes = event.changes, newChanges = []
+    copy.push({changes: newChanges})
+    for (var j = 0; j < changes.length; ++j) {
+      var change = changes[j], m = (void 0)
+      newChanges.push({from: change.from, to: change.to, text: change.text})
+      if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+        if (indexOf(newGroup, Number(m[1])) > -1) {
+          lst(newChanges)[prop] = change[prop]
+          delete change[prop]
         }
-        if (old && sel.anchorNode == null) sel.addRange(old);
-        else if (gecko) this.startGracePeriod();
+      } } }
+    }
+  }
+  return copy
+}
+
+// The 'scroll' parameter given to many of these indicated whether
+// the new cursor position should be scrolled into view after
+// modifying the selection.
+
+// If shift is held or the extend flag is set, extends a range to
+// include a given position (and optionally a second position).
+// Otherwise, simply returns the range between the given positions.
+// Used for cursor motion and such.
+function extendRange(range, head, other, extend) {
+  if (extend) {
+    var anchor = range.anchor
+    if (other) {
+      var posBefore = cmp(head, anchor) < 0
+      if (posBefore != (cmp(other, anchor) < 0)) {
+        anchor = head
+        head = other
+      } else if (posBefore != (cmp(head, other) < 0)) {
+        head = other
       }
-      this.rememberSelection();
-    },
-
-    startGracePeriod: function() {
-      var input = this;
-      clearTimeout(this.gracePeriod);
-      this.gracePeriod = setTimeout(function() {
-        input.gracePeriod = false;
-        if (input.selectionChanged())
-          input.cm.operation(function() { input.cm.curOp.selectionChanged = true; });
-      }, 20);
-    },
-
-    showMultipleSelections: function(info) {
-      removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
-      removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
-    },
-
-    rememberSelection: function() {
-      var sel = window.getSelection();
-      this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
-      this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
+    }
+    return new Range(anchor, head)
+  } else {
+    return new Range(other || head, head)
+  }
+}
+
+// Extend the primary selection range, discard the rest.
+function extendSelection(doc, head, other, options, extend) {
+  if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend) }
+  setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options)
+}
+
+// Extend all selections (pos is an array of selections with length
+// equal the number of selections)
+function extendSelections(doc, heads, options) {
+  var out = []
+  var extend = doc.cm && (doc.cm.display.shift || doc.extend)
+  for (var i = 0; i < doc.sel.ranges.length; i++)
+    { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend) }
+  var newSel = normalizeSelection(out, doc.sel.primIndex)
+  setSelection(doc, newSel, options)
+}
+
+// Updates a single range in the selection.
+function replaceOneSelection(doc, i, range, options) {
+  var ranges = doc.sel.ranges.slice(0)
+  ranges[i] = range
+  setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options)
+}
+
+// Reset the selection to a single range.
+function setSimpleSelection(doc, anchor, head, options) {
+  setSelection(doc, simpleSelection(anchor, head), options)
+}
+
+// Give beforeSelectionChange handlers a change to influence a
+// selection update.
+function filterSelectionChange(doc, sel, options) {
+  var obj = {
+    ranges: sel.ranges,
+    update: function(ranges) {
+      var this$1 = this;
+
+      this.ranges = []
+      for (var i = 0; i < ranges.length; i++)
+        { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                   clipPos(doc, ranges[i].head)) }
     },
-
-    selectionInEditor: function() {
-      var sel = window.getSelection();
-      if (!sel.rangeCount) return false;
-      var node = sel.getRangeAt(0).commonAncestorContainer;
-      return contains(this.div, node);
-    },
-
-    focus: function() {
-      if (this.cm.options.readOnly != "nocursor") this.div.focus();
-    },
-    blur: function() { this.div.blur(); },
-    getField: function() { return this.div; },
-
-    supportsTouch: function() { return true; },
-
-    receivedFocus: function() {
-      var input = this;
-      if (this.selectionInEditor())
-        this.pollSelection();
-      else
-        runInOp(this.cm, function() { input.cm.curOp.selectionChanged = true; });
-
-      function poll() {
-        if (input.cm.state.focused) {
-          input.pollSelection();
-          input.polling.set(input.cm.options.pollInterval, poll);
+    origin: options && options.origin
+  }
+  signal(doc, "beforeSelectionChange", doc, obj)
+  if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj) }
+  if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
+  else { return sel }
+}
+
+function setSelectionReplaceHistory(doc, sel, options) {
+  var done = doc.history.done, last = lst(done)
+  if (last && last.ranges) {
+    done[done.length - 1] = sel
+    setSelectionNoUndo(doc, sel, options)
+  } else {
+    setSelection(doc, sel, options)
+  }
+}
+
+// Set a new selection.
+function setSelection(doc, sel, options) {
+  setSelectionNoUndo(doc, sel, options)
+  addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
+}
+
+function setSelectionNoUndo(doc, sel, options) {
+  if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+    { sel = filterSelectionChange(doc, sel, options) }
+
+  var bias = options && options.bias ||
+    (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
+  setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))
+
+  if (!(options && options.scroll === false) && doc.cm)
+    { ensureCursorVisible(doc.cm) }
+}
+
+function setSelectionInner(doc, sel) {
+  if (sel.equals(doc.sel)) { return }
+
+  doc.sel = sel
+
+  if (doc.cm) {
+    doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true
+    signalCursorActivity(doc.cm)
+  }
+  signalLater(doc, "cursorActivity", doc)
+}
+
+// Verify that the selection does not partially select any atomic
+// marked ranges.
+function reCheckSelection(doc) {
+  setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false))
+}
+
+// Return a selection that does not partially select any atomic
+// ranges.
+function skipAtomicInSelection(doc, sel, bias, mayClear) {
+  var out
+  for (var i = 0; i < sel.ranges.length; i++) {
+    var range = sel.ranges[i]
+    var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
+    var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
+    var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
+    if (out || newAnchor != range.anchor || newHead != range.head) {
+      if (!out) { out = sel.ranges.slice(0, i) }
+      out[i] = new Range(newAnchor, newHead)
+    }
+  }
+  return out ? normalizeSelection(out, sel.primIndex) : sel
+}
+
+function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+  var line = getLine(doc, pos.line)
+  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+    var sp = line.markedSpans[i], m = sp.marker
+    if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+        (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+      if (mayClear) {
+        signal(m, "beforeCursorEnter")
+        if (m.explicitlyCleared) {
+          if (!line.markedSpans) { break }
+          else {--i; continue}
         }
       }
-      this.polling.set(this.cm.options.pollInterval, poll);
-    },
-
-    selectionChanged: function() {
-      var sel = window.getSelection();
-      return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
-        sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset;
-    },
-
-    pollSelection: function() {
-      if (!this.composing && !this.gracePeriod && this.selectionChanged()) {
-        var sel = window.getSelection(), cm = this.cm;
-        this.rememberSelection();
-        var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
-        var head = domToPos(cm, sel.focusNode, sel.focusOffset);
-        if (anchor && head) runInOp(cm, function() {
-          setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
-          if (anchor.bad || head.bad) cm.curOp.selectionChanged = true;
-        });
+      if (!m.atomic) { continue }
+
+      if (oldPos) {
+        var near = m.find(dir < 0 ? 1 : -1), diff = (void 0)
+        if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+          { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) }
+        if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+          { return skipAtomicInner(doc, near, pos, dir, mayClear) }
       }
-    },
-
-    pollContent: function() {
-      var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
-      var from = sel.from(), to = sel.to();
-      if (from.line < display.viewFrom || to.line > display.viewTo - 1) return false;
-
-      var fromIndex;
-      if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
-        var fromLine = lineNo(display.view[0].line);
-        var fromNode = display.view[0].node;
-      } else {
-        var fromLine = lineNo(display.view[fromIndex].line);
-        var fromNode = display.view[fromIndex - 1].node.nextSibling;
+
+      var far = m.find(dir < 0 ? -1 : 1)
+      if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+        { far = movePos(doc, far, dir, far.line == pos.line ? line : null) }
+      return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+    }
+  } }
+  return pos
+}
+
+// Ensure a given position is not inside an atomic range.
+function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+  var dir = bias || 1
+  var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+      skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+      (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
+  if (!found) {
+    doc.cantEdit = true
+    return Pos(doc.first, 0)
+  }
+  return found
+}
+
+function movePos(doc, pos, dir, line) {
+  if (dir < 0 && pos.ch == 0) {
+    if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+    else { return null }
+  } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+    if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+    else { return null }
+  } else {
+    return new Pos(pos.line, pos.ch + dir)
+  }
+}
+
+function selectAll(cm) {
+  cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)
+}
+
+// UPDATING
+
+// Allow "beforeChange" event handlers to influence a change
+function filterChange(doc, change, update) {
+  var obj = {
+    canceled: false,
+    from: change.from,
+    to: change.to,
+    text: change.text,
+    origin: change.origin,
+    cancel: function () { return obj.canceled = true; }
+  }
+  if (update) { obj.update = function (from, to, text, origin) {
+    if (from) { obj.from = clipPos(doc, from) }
+    if (to) { obj.to = clipPos(doc, to) }
+    if (text) { obj.text = text }
+    if (origin !== undefined) { obj.origin = origin }
+  } }
+  signal(doc, "beforeChange", doc, obj)
+  if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj) }
+
+  if (obj.canceled) { return null }
+  return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+}
+
+// Apply a change to a document, and add it to the document's
+// history, and propagating it to all linked documents.
+function makeChange(doc, change, ignoreReadOnly) {
+  if (doc.cm) {
+    if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+    if (doc.cm.state.suppressEdits) { return }
+  }
+
+  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+    change = filterChange(doc, change, true)
+    if (!change) { return }
+  }
+
+  // Possibly split or suppress the update based on the presence
+  // of read-only spans in its range.
+  var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to)
+  if (split) {
+    for (var i = split.length - 1; i >= 0; --i)
+      { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text}) }
+  } else {
+    makeChangeInner(doc, change)
+  }
+}
+
+function makeChangeInner(doc, change) {
+  if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+  var selAfter = computeSelAfterChange(doc, change)
+  addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN)
+
+  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change))
+  var rebased = []
+
+  linkedDocs(doc, function (doc, sharedHist) {
+    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+      rebaseHist(doc.history, change)
+      rebased.push(doc.history)
+    }
+    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change))
+  })
+}
+
+// Revert a change stored in a document's history.
+function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+  if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }
+
+  var hist = doc.history, event, selAfter = doc.sel
+  var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done
+
+  // Verify that there is a useable event (so that ctrl-z won't
+  // needlessly clear selection events)
+  var i = 0
+  for (; i < source.length; i++) {
+    event = source[i]
+    if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+      { break }
+  }
+  if (i == source.length) { return }
+  hist.lastOrigin = hist.lastSelOrigin = null
+
+  for (;;) {
+    event = source.pop()
+    if (event.ranges) {
+      pushSelectionToHistory(event, dest)
+      if (allowSelectionOnly && !event.equals(doc.sel)) {
+        setSelection(doc, event, {clearRedo: false})
+        return
+      }
+      selAfter = event
+    }
+    else { break }
+  }
+
+  // Build up a reverse change object to add to the opposite history
+  // stack (redo when undoing, and vice versa).
+  var antiChanges = []
+  pushSelectionToHistory(selAfter, dest)
+  dest.push({changes: antiChanges, generation: hist.generation})
+  hist.generation = event.generation || ++hist.maxGeneration
+
+  var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")
+
+  var loop = function ( i ) {
+    var change = event.changes[i]
+    change.origin = type
+    if (filter && !filterChange(doc, change, false)) {
+      source.length = 0
+      return {}
+    }
+
+    antiChanges.push(historyChangeFromChange(doc, change))
+
+    var after = i ? computeSelAfterChange(doc, change) : lst(source)
+    makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change))
+    if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}) }
+    var rebased = []
+
+    // Propagate to the linked documents
+    linkedDocs(doc, function (doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change)
+        rebased.push(doc.history)
+      }
+      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change))
+    })
+  };
+
+  for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+    var returned = loop( i$1 );
+
+    if ( returned ) return returned.v;
+  }
+}
+
+// Sub-views need their line numbers shifted when text is added
+// above or below them in the parent document.
+function shiftDoc(doc, distance) {
+  if (distance == 0) { return }
+  doc.first += distance
+  doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+    Pos(range.anchor.line + distance, range.anchor.ch),
+    Pos(range.head.line + distance, range.head.ch)
+  ); }), doc.sel.primIndex)
+  if (doc.cm) {
+    regChange(doc.cm, doc.first, doc.first - distance, distance)
+    for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+      { regLineChange(doc.cm, l, "gutter") }
+  }
+}
+
+// More lower-level change function, handling only a single document
+// (not linked ones).
+function makeChangeSingleDoc(doc, change, selAfter, spans) {
+  if (doc.cm && !doc.cm.curOp)
+    { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+  if (change.to.line < doc.first) {
+    shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line))
+    return
+  }
+  if (change.from.line > doc.lastLine()) { return }
+
+  // Clip the change to the size of this doc
+  if (change.from.line < doc.first) {
+    var shift = change.text.length - 1 - (doc.first - change.from.line)
+    shiftDoc(doc, shift)
+    change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+              text: [lst(change.text)], origin: change.origin}
+  }
+  var last = doc.lastLine()
+  if (change.to.line > last) {
+    change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+              text: [change.text[0]], origin: change.origin}
+  }
+
+  change.removed = getBetween(doc, change.from, change.to)
+
+  if (!selAfter) { selAfter = computeSelAfterChange(doc, change) }
+  if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans) }
+  else { updateDoc(doc, change, spans) }
+  setSelectionNoUndo(doc, selAfter, sel_dontScroll)
+}
+
+// Handle the interaction of a change to a document with the editor
+// that this document is part of.
+function makeChangeSingleDocInEditor(cm, change, spans) {
+  var doc = cm.doc, display = cm.display, from = change.from, to = change.to
+
+  var recomputeMaxLength = false, checkWidthStart = from.line
+  if (!cm.options.lineWrapping) {
+    checkWidthStart = lineNo(visualLine(getLine(doc, from.line)))
+    doc.iter(checkWidthStart, to.line + 1, function (line) {
+      if (line == display.maxLine) {
+        recomputeMaxLength = true
+        return true
       }
-      var toIndex = findViewIndex(cm, to.line);
-      if (toIndex == display.view.length - 1) {
-        var toLine = display.viewTo - 1;
-        var toNode = display.lineDiv.lastChild;
-      } else {
-        var toLine = lineNo(display.view[toIndex + 1].line) - 1;
-        var toNode = display.view[toIndex + 1].node.previousSibling;
+    })
+  }
+
+  if (doc.sel.contains(change.from, change.to) > -1)
+    { signalCursorActivity(cm) }
+
+  updateDoc(doc, change, spans, estimateHeight(cm))
+
+  if (!cm.options.lineWrapping) {
+    doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+      var len = lineLength(line)
+      if (len > display.maxLineLength) {
+        display.maxLine = line
+        display.maxLineLength = len
+        display.maxLineChanged = true
+        recomputeMaxLength = false
       }
-
-      var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
-      var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
-      while (newText.length > 1 && oldText.length > 1) {
-        if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
-        else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
-        else break;
+    })
+    if (recomputeMaxLength) { cm.curOp.updateMaxLine = true }
+  }
+
+  retreatFrontier(doc, from.line)
+  startWorker(cm, 400)
+
+  var lendiff = change.text.length - (to.line - from.line) - 1
+  // Remember that these lines changed, for updating the display
+  if (change.full)
+    { regChange(cm) }
+  else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+    { regLineChange(cm, from.line, "text") }
+  else
+    { regChange(cm, from.line, to.line + 1, lendiff) }
+
+  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change")
+  if (changeHandler || changesHandler) {
+    var obj = {
+      from: from, to: to,
+      text: change.text,
+      removed: change.removed,
+      origin: change.origin
+    }
+    if (changeHandler) { signalLater(cm, "change", cm, obj) }
+    if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj) }
+  }
+  cm.display.selForContextMenu = null
+}
+
+function replaceRange(doc, code, from, to, origin) {
+  if (!to) { to = from }
+  if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp }
+  if (typeof code == "string") { code = doc.splitLines(code) }
+  makeChange(doc, {from: from, to: to, text: code, origin: origin})
+}
+
+// Rebasing/resetting history to deal with externally-sourced changes
+
+function rebaseHistSelSingle(pos, from, to, diff) {
+  if (to < pos.line) {
+    pos.line += diff
+  } else if (from < pos.line) {
+    pos.line = from
+    pos.ch = 0
+  }
+}
+
+// Tries to rebase an array of history events given a change in the
+// document. If the change touches the same lines as the event, the
+// event, and everything 'behind' it, is discarded. If the change is
+// before the event, the event's positions are updated. Uses a
+// copy-on-write scheme for the positions, to avoid having to
+// reallocate them all on every rebase, but also avoid problems with
+// shared position objects being unsafely updated.
+function rebaseHistArray(array, from, to, diff) {
+  for (var i = 0; i < array.length; ++i) {
+    var sub = array[i], ok = true
+    if (sub.ranges) {
+      if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true }
+      for (var j = 0; j < sub.ranges.length; j++) {
+        rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff)
+        rebaseHistSelSingle(sub.ranges[j].head, from, to, diff)
+      }
+      continue
+    }
+    for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+      var cur = sub.changes[j$1]
+      if (to < cur.from.line) {
+        cur.from = Pos(cur.from.line + diff, cur.from.ch)
+        cur.to = Pos(cur.to.line + diff, cur.to.ch)
+      } else if (from <= cur.to.line) {
+        ok = false
+        break
       }
-
-      var cutFront = 0, cutEnd = 0;
-      var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
-      while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
-        ++cutFront;
-      var newBot = lst(newText), oldBot = lst(oldText);
-      var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
-                               oldBot.length - (oldText.length == 1 ? cutFront : 0));
-      while (cutEnd < maxCutEnd &&
-             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
-        ++cutEnd;
-
-      newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd);
-      newText[0] = newText[0].slice(cutFront);
-
-      var chFrom = Pos(fromLine, cutFront);
-      var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
-      if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
-        replaceRange(cm.doc, newText, chFrom, chTo, "+input");
-        return true;
+    }
+    if (!ok) {
+      array.splice(0, i + 1)
+      i = 0
+    }
+  }
+}
+
+function rebaseHist(hist, change) {
+  var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1
+  rebaseHistArray(hist.done, from, to, diff)
+  rebaseHistArray(hist.undone, from, to, diff)
+}
+
+// Utility for applying a change to a line by handle or number,
+// returning the number and optionally registering the line as
+// changed.
+function changeLine(doc, handle, changeType, op) {
+  var no = handle, line = handle
+  if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)) }
+  else { no = lineNo(handle) }
+  if (no == null) { return null }
+  if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType) }
+  return line
+}
+
+// The document is represented as a BTree consisting of leaves, with
+// chunk of lines in them, and branches, with up to ten leaves or
+// other branch nodes below them. The top node is always a branch
+// node, and is the document object itself (meaning it has
+// additional methods and properties).
+//
+// All nodes have parent links. The tree is used both to go from
+// line numbers to line objects, and to go from objects to numbers.
+// It also indexes by height, and is used to convert between height
+// and line object, and to find the total height of the document.
+//
+// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+function LeafChunk(lines) {
+  var this$1 = this;
+
+  this.lines = lines
+  this.parent = null
+  var height = 0
+  for (var i = 0; i < lines.length; ++i) {
+    lines[i].parent = this$1
+    height += lines[i].height
+  }
+  this.height = height
+}
+
+LeafChunk.prototype = {
+  chunkSize: function chunkSize() { return this.lines.length },
+
+  // Remove the n lines at offset 'at'.
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    for (var i = at, e = at + n; i < e; ++i) {
+      var line = this$1.lines[i]
+      this$1.height -= line.height
+      cleanUpLine(line)
+      signalLater(line, "delete")
+    }
+    this.lines.splice(at, n)
+  },
+
+  // Helper used to collapse a small branch into a single leaf.
+  collapse: function collapse(lines) {
+    lines.push.apply(lines, this.lines)
+  },
+
+  // Insert the given array of lines at offset 'at', count them as
+  // having the given height.
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.height += height
+    this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at))
+    for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1 }
+  },
+
+  // Used to iterate over a part of the tree.
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var e = at + n; at < e; ++at)
+      { if (op(this$1.lines[at])) { return true } }
+  }
+}
+
+function BranchChunk(children) {
+  var this$1 = this;
+
+  this.children = children
+  var size = 0, height = 0
+  for (var i = 0; i < children.length; ++i) {
+    var ch = children[i]
+    size += ch.chunkSize(); height += ch.height
+    ch.parent = this$1
+  }
+  this.size = size
+  this.height = height
+  this.parent = null
+}
+
+BranchChunk.prototype = {
+  chunkSize: function chunkSize() { return this.size },
+
+  removeInner: function removeInner(at, n) {
+    var this$1 = this;
+
+    this.size -= n
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at < sz) {
+        var rm = Math.min(n, sz - at), oldHeight = child.height
+        child.removeInner(at, rm)
+        this$1.height -= oldHeight - child.height
+        if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null }
+        if ((n -= rm) == 0) { break }
+        at = 0
+      } else { at -= sz }
+    }
+    // If the result is smaller than 25 lines, ensure that it is a
+    // single leaf node.
+    if (this.size - n < 25 &&
+        (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+      var lines = []
+      this.collapse(lines)
+      this.children = [new LeafChunk(lines)]
+      this.children[0].parent = this
+    }
+  },
+
+  collapse: function collapse(lines) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines) }
+  },
+
+  insertInner: function insertInner(at, lines, height) {
+    var this$1 = this;
+
+    this.size += lines.length
+    this.height += height
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at <= sz) {
+        child.insertInner(at, lines, height)
+        if (child.lines && child.lines.length > 50) {
+          // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+          // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+          var remaining = child.lines.length % 25 + 25
+          for (var pos = remaining; pos < child.lines.length;) {
+            var leaf = new LeafChunk(child.lines.slice(pos, pos += 25))
+            child.height -= leaf.height
+            this$1.children.splice(++i, 0, leaf)
+            leaf.parent = this$1
+          }
+          child.lines = child.lines.slice(0, remaining)
+          this$1.maybeSpill()
+        }
+        break
+      }
+      at -= sz
+    }
+  },
+
+  // When a node has grown, check whether it should be split.
+  maybeSpill: function maybeSpill() {
+    if (this.children.length <= 10) { return }
+    var me = this
+    do {
+      var spilled = me.children.splice(me.children.length - 5, 5)
+      var sibling = new BranchChunk(spilled)
+      if (!me.parent) { // Become the parent node
+        var copy = new BranchChunk(me.children)
+        copy.parent = me
+        me.children = [copy, sibling]
+        me = copy
+     } else {
+        me.size -= sibling.size
+        me.height -= sibling.height
+        var myIndex = indexOf(me.parent.children, me)
+        me.parent.children.splice(myIndex + 1, 0, sibling)
       }
-    },
-
-    ensurePolled: function() {
-      this.forceCompositionEnd();
-    },
-    reset: function() {
-      this.forceCompositionEnd();
-    },
-    forceCompositionEnd: function() {
-      if (!this.composing || this.composing.handled) return;
-      this.applyComposition(this.composing);
-      this.composing.handled = true;
-      this.div.blur();
-      this.div.focus();
-    },
-    applyComposition: function(composing) {
-      if (this.cm.isReadOnly())
-        operation(this.cm, regChange)(this.cm)
-      else if (composing.data && composing.data != composing.startData)
-        operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel);
-    },
-
-    setUneditable: function(node) {
-      node.contentEditable = "false"
-    },
-
-    onKeyPress: function(e) {
-      e.preventDefault();
-      if (!this.cm.isReadOnly())
-        operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0);
-    },
-
-    readOnlyChanged: function(val) {
-      this.div.contentEditable = String(val != "nocursor")
-    },
-
-    onContextMenu: nothing,
-    resetPosition: nothing,
-
-    needsContentAttribute: true
-  }, ContentEditableInput.prototype);
-
-  function posToDOM(cm, pos) {
-    var view = findViewForLine(cm, pos.line);
-    if (!view || view.hidden) return null;
-    var line = getLine(cm.doc, pos.line);
-    var info = mapFromLineView(view, line, pos.line);
-
-    var order = getOrder(line), side = "left";
-    if (order) {
-      var partPos = getBidiPartAt(order, pos.ch);
-      side = partPos % 2 ? "right" : "left";
-    }
-    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
-    result.offset = result.collapse == "right" ? result.end : result.start;
-    return result;
-  }
-
-  function badPos(pos, bad) { if (bad) pos.bad = true; return pos; }
-
-  function domToPos(cm, node, offset) {
-    var lineNode;
-    if (node == cm.display.lineDiv) {
-      lineNode = cm.display.lineDiv.childNodes[offset];
-      if (!lineNode) return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true);
-      node = null; offset = 0;
+      sibling.parent = me.parent
+    } while (me.children.length > 10)
+    me.parent.maybeSpill()
+  },
+
+  iterN: function iterN(at, n, op) {
+    var this$1 = this;
+
+    for (var i = 0; i < this.children.length; ++i) {
+      var child = this$1.children[i], sz = child.chunkSize()
+      if (at < sz) {
+        var used = Math.min(n, sz - at)
+        if (child.iterN(at, used, op)) { return true }
+        if ((n -= used) == 0) { break }
+        at = 0
+      } else { at -= sz }
+    }
+  }
+}
+
+// Line widgets are block elements displayed above or below a line.
+
+var LineWidget = function(doc, node, options) {
+  var this$1 = this;
+
+  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+    { this$1[opt] = options[opt] } } }
+  this.doc = doc
+  this.node = node
+};
+
+LineWidget.prototype.clear = function () {
+    var this$1 = this;
+
+  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line)
+  if (no == null || !ws) { return }
+  for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1) } }
+  if (!ws.length) { line.widgets = null }
+  var height = widgetHeight(this)
+  updateLineHeight(line, Math.max(0, line.height - height))
+  if (cm) {
+    runInOp(cm, function () {
+      adjustScrollWhenAboveVisible(cm, line, -height)
+      regLineChange(cm, no, "widget")
+    })
+    signalLater(cm, "lineWidgetCleared", cm, this, no)
+  }
+};
+
+LineWidget.prototype.changed = function () {
+    var this$1 = this;
+
+  var oldH = this.height, cm = this.doc.cm, line = this.line
+  this.height = null
+  var diff = widgetHeight(this) - oldH
+  if (!diff) { return }
+  updateLineHeight(line, line.height + diff)
+  if (cm) {
+    runInOp(cm, function () {
+      cm.curOp.forceUpdate = true
+      adjustScrollWhenAboveVisible(cm, line, diff)
+      signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line))
+    })
+  }
+};
+eventMixin(LineWidget)
+
+function adjustScrollWhenAboveVisible(cm, line, diff) {
+  if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+    { addToScrollTop(cm, diff) }
+}
+
+function addLineWidget(doc, handle, node, options) {
+  var widget = new LineWidget(doc, node, options)
+  var cm = doc.cm
+  if (cm && widget.noHScroll) { cm.display.alignWidgets = true }
+  changeLine(doc, handle, "widget", function (line) {
+    var widgets = line.widgets || (line.widgets = [])
+    if (widget.insertAt == null) { widgets.push(widget) }
+    else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget) }
+    widget.line = line
+    if (cm && !lineIsHidden(doc, line)) {
+      var aboveVisible = heightAtLine(line) < doc.scrollTop
+      updateLineHeight(line, line.height + widgetHeight(widget))
+      if (aboveVisible) { addToScrollTop(cm, widget.height) }
+      cm.curOp.forceUpdate = true
+    }
+    return true
+  })
+  signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle))
+  return widget
+}
+
+// TEXTMARKERS
+
+// Created with markText and setBookmark methods. A TextMarker is a
+// handle that can be used to clear or find a marked position in the
+// document. Line objects hold arrays (markedSpans) containing
+// {from, to, marker} object pointing to such marker objects, and
+// indicating that such a marker is present on that line. Multiple
+// lines may point to the same marker when it spans across lines.
+// The spans will have null for their from/to properties when the
+// marker continues beyond the start/end of the line. Markers have
+// links back to the lines they currently touch.
+
+// Collapsed markers have unique ids, in order to be able to order
+// them, which is needed for uniquely determining an outer marker
+// when they overlap (they may nest, but not partially overlap).
+var nextMarkerId = 0
+
+var TextMarker = function(doc, type) {
+  this.lines = []
+  this.type = type
+  this.doc = doc
+  this.id = ++nextMarkerId
+};
+
+// Clear the marker.
+TextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  var cm = this.doc.cm, withOp = cm && !cm.curOp
+  if (withOp) { startOperation(cm) }
+  if (hasHandler(this, "clear")) {
+    var found = this.find()
+    if (found) { signalLater(this, "clear", found.from, found.to) }
+  }
+  var min = null, max = null
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i]
+    var span = getMarkedSpanFor(line.markedSpans, this$1)
+    if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text") }
+    else if (cm) {
+      if (span.to != null) { max = lineNo(line) }
+      if (span.from != null) { min = lineNo(line) }
+    }
+    line.markedSpans = removeMarkedSpan(line.markedSpans, span)
+    if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
+      { updateLineHeight(line, textHeight(cm.display)) }
+  }
+  if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+    var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual)
+    if (len > cm.display.maxLineLength) {
+      cm.display.maxLine = visual
+      cm.display.maxLineLength = len
+      cm.display.maxLineChanged = true
+    }
+  } }
+
+  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1) }
+  this.lines.length = 0
+  this.explicitlyCleared = true
+  if (this.atomic && this.doc.cantEdit) {
+    this.doc.cantEdit = false
+    if (cm) { reCheckSelection(cm.doc) }
+  }
+  if (cm) { signalLater(cm, "markerCleared", cm, this, min, max) }
+  if (withOp) { endOperation(cm) }
+  if (this.parent) { this.parent.clear() }
+};
+
+// Find the position of the marker in the document. Returns a {from,
+// to} object by default. Side can be passed to get a specific side
+// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+// Pos objects returned contain a line object, rather than a line
+// number (used to prevent looking up the same line twice).
+TextMarker.prototype.find = function (side, lineObj) {
+    var this$1 = this;
+
+  if (side == null && this.type == "bookmark") { side = 1 }
+  var from, to
+  for (var i = 0; i < this.lines.length; ++i) {
+    var line = this$1.lines[i]
+    var span = getMarkedSpanFor(line.markedSpans, this$1)
+    if (span.from != null) {
+      from = Pos(lineObj ? line : lineNo(line), span.from)
+      if (side == -1) { return from }
+    }
+    if (span.to != null) {
+      to = Pos(lineObj ? line : lineNo(line), span.to)
+      if (side == 1) { return to }
+    }
+  }
+  return from && {from: from, to: to}
+};
+
+// Signals that the marker's widget changed, and surrounding layout
+// should be recomputed.
+TextMarker.prototype.changed = function () {
+    var this$1 = this;
+
+  var pos = this.find(-1, true), widget = this, cm = this.doc.cm
+  if (!pos || !cm) { return }
+  runInOp(cm, function () {
+    var line = pos.line, lineN = lineNo(pos.line)
+    var view = findViewForLine(cm, lineN)
+    if (view) {
+      clearLineMeasurementCacheFor(view)
+      cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
+    }
+    cm.curOp.updateMaxLine = true
+    if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+      var oldHeight = widget.height
+      widget.height = null
+      var dHeight = widgetHeight(widget) - oldHeight
+      if (dHeight)
+        { updateLineHeight(line, line.height + dHeight) }
+    }
+    signalLater(cm, "markerChanged", cm, this$1)
+  })
+};
+
+TextMarker.prototype.attachLine = function (line) {
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp
+    if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+      { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this) }
+  }
+  this.lines.push(line)
+};
+
+TextMarker.prototype.detachLine = function (line) {
+  this.lines.splice(indexOf(this.lines, line), 1)
+  if (!this.lines.length && this.doc.cm) {
+    var op = this.doc.cm.curOp
+    ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
+  }
+};
+eventMixin(TextMarker)
+
+// Create a marker, wire it up to the right lines, and
+function markText(doc, from, to, options, type) {
+  // Shared markers (across linked documents) are handled separately
+  // (markTextShared will call out to this again, once per
+  // document).
+  if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+  // Ensure we are in an operation.
+  if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+  var marker = new TextMarker(doc, type), diff = cmp(from, to)
+  if (options) { copyObj(options, marker, false) }
+  // Don't connect empty markers unless clearWhenEmpty is false
+  if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+    { return marker }
+  if (marker.replacedWith) {
+    // Showing up as a widget implies collapsed (widget replaces text)
+    marker.collapsed = true
+    marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget")
+    if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true") }
+    if (options.insertLeft) { marker.widgetNode.insertLeft = true }
+  }
+  if (marker.collapsed) {
+    if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+        from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+      { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+    seeCollapsedSpans()
+  }
+
+  if (marker.addToHistory)
+    { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN) }
+
+  var curLine = from.line, cm = doc.cm, updateMaxLine
+  doc.iter(curLine, to.line + 1, function (line) {
+    if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+      { updateMaxLine = true }
+    if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0) }
+    addMarkedSpan(line, new MarkedSpan(marker,
+                                       curLine == from.line ? from.ch : null,
+                                       curLine == to.line ? to.ch : null))
+    ++curLine
+  })
+  // lineIsHidden depends on the presence of the spans, so needs a second pass
+  if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+    if (lineIsHidden(doc, line)) { updateLineHeight(line, 0) }
+  }) }
+
+  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }) }
+
+  if (marker.readOnly) {
+    seeReadOnlySpans()
+    if (doc.history.done.length || doc.history.undone.length)
+      { doc.clearHistory() }
+  }
+  if (marker.collapsed) {
+    marker.id = ++nextMarkerId
+    marker.atomic = true
+  }
+  if (cm) {
+    // Sync editor state
+    if (updateMaxLine) { cm.curOp.updateMaxLine = true }
+    if (marker.collapsed)
+      { regChange(cm, from.line, to.line + 1) }
+    else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
+      { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text") } }
+    if (marker.atomic) { reCheckSelection(cm.doc) }
+    signalLater(cm, "markerAdded", cm, marker)
+  }
+  return marker
+}
+
+// SHARED TEXTMARKERS
+
+// A shared marker spans multiple linked documents. It is
+// implemented as a meta-marker-object controlling multiple normal
+// markers.
+var SharedTextMarker = function(markers, primary) {
+  var this$1 = this;
+
+  this.markers = markers
+  this.primary = primary
+  for (var i = 0; i < markers.length; ++i)
+    { markers[i].parent = this$1 }
+};
+
+SharedTextMarker.prototype.clear = function () {
+    var this$1 = this;
+
+  if (this.explicitlyCleared) { return }
+  this.explicitlyCleared = true
+  for (var i = 0; i < this.markers.length; ++i)
+    { this$1.markers[i].clear() }
+  signalLater(this, "clear")
+};
+
+SharedTextMarker.prototype.find = function (side, lineObj) {
+  return this.primary.find(side, lineObj)
+};
+eventMixin(SharedTextMarker)
+
+function markTextShared(doc, from, to, options, type) {
+  options = copyObj(options)
+  options.shared = false
+  var markers = [markText(doc, from, to, options, type)], primary = markers[0]
+  var widget = options.widgetNode
+  linkedDocs(doc, function (doc) {
+    if (widget) { options.widgetNode = widget.cloneNode(true) }
+    markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
+    for (var i = 0; i < doc.linked.length; ++i)
+      { if (doc.linked[i].isParent) { return } }
+    primary = lst(markers)
+  })
+  return new SharedTextMarker(markers, primary)
+}
+
+function findSharedMarkers(doc) {
+  return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+}
+
+function copySharedMarkers(doc, markers) {
+  for (var i = 0; i < markers.length; i++) {
+    var marker = markers[i], pos = marker.find()
+    var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
+    if (cmp(mFrom, mTo)) {
+      var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
+      marker.markers.push(subMark)
+      subMark.parent = marker
+    }
+  }
+}
+
+function detachSharedMarkers(markers) {
+  var loop = function ( i ) {
+    var marker = markers[i], linked = [marker.primary.doc]
+    linkedDocs(marker.primary.doc, function (d) { return linked.push(d); })
+    for (var j = 0; j < marker.markers.length; j++) {
+      var subMarker = marker.markers[j]
+      if (indexOf(linked, subMarker.doc) == -1) {
+        subMarker.parent = null
+        marker.markers.splice(j--, 1)
+      }
+    }
+  };
+
+  for (var i = 0; i < markers.length; i++) loop( i );
+}
+
+var nextDocId = 0
+var Doc = function(text, mode, firstLine, lineSep, direction) {
+  if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+  if (firstLine == null) { firstLine = 0 }
+
+  BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
+  this.first = firstLine
+  this.scrollTop = this.scrollLeft = 0
+  this.cantEdit = false
+  this.cleanGeneration = 1
+  this.modeFrontier = this.highlightFrontier = firstLine
+  var start = Pos(firstLine, 0)
+  this.sel = simpleSelection(start)
+  this.history = new History(null)
+  this.id = ++nextDocId
+  this.modeOption = mode
+  this.lineSep = lineSep
+  this.direction = (direction == "rtl") ? "rtl" : "ltr"
+  this.extend = false
+
+  if (typeof text == "string") { text = this.splitLines(text) }
+  updateDoc(this, {from: start, to: start, text: text})
+  setSelection(this, simpleSelection(start), sel_dontScroll)
+}
+
+Doc.prototype = createObj(BranchChunk.prototype, {
+  constructor: Doc,
+  // Iterate over the document. Supports two forms -- with only one
+  // argument, it calls that for each line in the document. With
+  // three, it iterates over the range given by the first two (with
+  // the second being non-inclusive).
+  iter: function(from, to, op) {
+    if (op) { this.iterN(from - this.first, to - from, op) }
+    else { this.iterN(this.first, this.first + this.size, from) }
+  },
+
+  // Non-public interface for adding and removing lines.
+  insert: function(at, lines) {
+    var height = 0
+    for (var i = 0; i < lines.length; ++i) { height += lines[i].height }
+    this.insertInner(at - this.first, lines, height)
+  },
+  remove: function(at, n) { this.removeInner(at - this.first, n) },
+
+  // From here, the methods are part of the public interface. Most
+  // are also available from CodeMirror (editor) instances.
+
+  getValue: function(lineSep) {
+    var lines = getLines(this, this.first, this.first + this.size)
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+  setValue: docMethodOp(function(code) {
+    var top = Pos(this.first, 0), last = this.first + this.size - 1
+    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                      text: this.splitLines(code), origin: "setValue", full: true}, true)
+    if (this.cm) { scrollToCoords(this.cm, 0, 0) }
+    setSelection(this, simpleSelection(top), sel_dontScroll)
+  }),
+  replaceRange: function(code, from, to, origin) {
+    from = clipPos(this, from)
+    to = to ? clipPos(this, to) : from
+    replaceRange(this, code, from, to, origin)
+  },
+  getRange: function(from, to, lineSep) {
+    var lines = getBetween(this, clipPos(this, from), clipPos(this, to))
+    if (lineSep === false) { return lines }
+    return lines.join(lineSep || this.lineSeparator())
+  },
+
+  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+  getLineNumber: function(line) {return lineNo(line)},
+
+  getLineHandleVisualStart: function(line) {
+    if (typeof line == "number") { line = getLine(this, line) }
+    return visualLine(line)
+  },
+
+  lineCount: function() {return this.size},
+  firstLine: function() {return this.first},
+  lastLine: function() {return this.first + this.size - 1},
+
+  clipPos: function(pos) {return clipPos(this, pos)},
+
+  getCursor: function(start) {
+    var range = this.sel.primary(), pos
+    if (start == null || start == "head") { pos = range.head }
+    else if (start == "anchor") { pos = range.anchor }
+    else if (start == "end" || start == "to" || start === false) { pos = range.to() }
+    else { pos = range.from() }
+    return pos
+  },
+  listSelections: function() { return this.sel.ranges },
+  somethingSelected: function() {return this.sel.somethingSelected()},
+
+  setCursor: docMethodOp(function(line, ch, options) {
+    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
+  }),
+  setSelection: docMethodOp(function(anchor, head, options) {
+    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
+  }),
+  extendSelection: docMethodOp(function(head, other, options) {
+    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
+  }),
+  extendSelections: docMethodOp(function(heads, options) {
+    extendSelections(this, clipPosArray(this, heads), options)
+  }),
+  extendSelectionsBy: docMethodOp(function(f, options) {
+    var heads = map(this.sel.ranges, f)
+    extendSelections(this, clipPosArray(this, heads), options)
+  }),
+  setSelections: docMethodOp(function(ranges, primary, options) {
+    var this$1 = this;
+
+    if (!ranges.length) { return }
+    var out = []
+    for (var i = 0; i < ranges.length; i++)
+      { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
+                         clipPos(this$1, ranges[i].head)) }
+    if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex) }
+    setSelection(this, normalizeSelection(out, primary), options)
+  }),
+  addSelection: docMethodOp(function(anchor, head, options) {
+    var ranges = this.sel.ranges.slice(0)
+    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
+    setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
+  }),
+
+  getSelection: function(lineSep) {
+    var this$1 = this;
+
+    var ranges = this.sel.ranges, lines
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+      lines = lines ? lines.concat(sel) : sel
+    }
+    if (lineSep === false) { return lines }
+    else { return lines.join(lineSep || this.lineSeparator()) }
+  },
+  getSelections: function(lineSep) {
+    var this$1 = this;
+
+    var parts = [], ranges = this.sel.ranges
+    for (var i = 0; i < ranges.length; i++) {
+      var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
+      if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()) }
+      parts[i] = sel
+    }
+    return parts
+  },
+  replaceSelection: function(code, collapse, origin) {
+    var dup = []
+    for (var i = 0; i < this.sel.ranges.length; i++)
+      { dup[i] = code }
+    this.replaceSelections(dup, collapse, origin || "+input")
+  },
+  replaceSelections: docMethodOp(function(code, collapse, origin) {
+    var this$1 = this;
+
+    var changes = [], sel = this.sel
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range = sel.ranges[i]
+      changes[i] = {from: range.from(), to: range.to(), text: this$1.splitLines(code[i]), origin: origin}
+    }
+    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
+    for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+      { makeChange(this$1, changes[i$1]) }
+    if (newSel) { setSelectionReplaceHistory(this, newSel) }
+    else if (this.cm) { ensureCursorVisible(this.cm) }
+  }),
+  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
+  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
+  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
+  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),
+
+  setExtending: function(val) {this.extend = val},
+  getExtending: function() {return this.extend},
+
+  historySize: function() {
+    var hist = this.history, done = 0, undone = 0
+    for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done } }
+    for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone } }
+    return {undo: done, redo: undone}
+  },
+  clearHistory: function() {this.history = new History(this.history.maxGeneration)},
+
+  markClean: function() {
+    this.cleanGeneration = this.changeGeneration(true)
+  },
+  changeGeneration: function(forceSplit) {
+    if (forceSplit)
+      { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null }
+    return this.history.generation
+  },
+  isClean: function (gen) {
+    return this.history.generation == (gen || this.cleanGeneration)
+  },
+
+  getHistory: function() {
+    return {done: copyHistoryArray(this.history.done),
+            undone: copyHistoryArray(this.history.undone)}
+  },
+  setHistory: function(histData) {
+    var hist = this.history = new History(this.history.maxGeneration)
+    hist.done = copyHistoryArray(histData.done.slice(0), null, true)
+    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
+  },
+
+  setGutterMarker: docMethodOp(function(line, gutterID, value) {
+    return changeLine(this, line, "gutter", function (line) {
+      var markers = line.gutterMarkers || (line.gutterMarkers = {})
+      markers[gutterID] = value
+      if (!value && isEmpty(markers)) { line.gutterMarkers = null }
+      return true
+    })
+  }),
+
+  clearGutter: docMethodOp(function(gutterID) {
+    var this$1 = this;
+
+    this.iter(function (line) {
+      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+        changeLine(this$1, line, "gutter", function () {
+          line.gutterMarkers[gutterID] = null
+          if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null }
+          return true
+        })
+      }
+    })
+  }),
+
+  lineInfo: function(line) {
+    var n
+    if (typeof line == "number") {
+      if (!isLine(this, line)) { return null }
+      n = line
+      line = getLine(this, line)
+      if (!line) { return null }
     } else {
-      for (lineNode = node;; lineNode = lineNode.parentNode) {
-        if (!lineNode || lineNode == cm.display.lineDiv) return null;
-        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) break;
+      n = lineNo(line)
+      if (n == null) { return null }
+    }
+    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+            widgets: line.widgets}
+  },
+
+  addLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass"
+      if (!line[prop]) { line[prop] = cls }
+      else if (classTest(cls).test(line[prop])) { return false }
+      else { line[prop] += " " + cls }
+      return true
+    })
+  }),
+  removeLineClass: docMethodOp(function(handle, where, cls) {
+    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+      var prop = where == "text" ? "textClass"
+               : where == "background" ? "bgClass"
+               : where == "gutter" ? "gutterClass" : "wrapClass"
+      var cur = line[prop]
+      if (!cur) { return false }
+      else if (cls == null) { line[prop] = null }
+      else {
+        var found = cur.match(classTest(cls))
+        if (!found) { return false }
+        var end = found.index + found[0].length
+        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null
+      }
+      return true
+    })
+  }),
+
+  addLineWidget: docMethodOp(function(handle, node, options) {
+    return addLineWidget(this, handle, node, options)
+  }),
+  removeLineWidget: function(widget) { widget.clear() },
+
+  markText: function(from, to, options) {
+    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+  },
+  setBookmark: function(pos, options) {
+    var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                    insertLeft: options && options.insertLeft,
+                    clearWhenEmpty: false, shared: options && options.shared,
+                    handleMouseEvents: options && options.handleMouseEvents}
+    pos = clipPos(this, pos)
+    return markText(this, pos, pos, realOpts, "bookmark")
+  },
+  findMarksAt: function(pos) {
+    pos = clipPos(this, pos)
+    var markers = [], spans = getLine(this, pos.line).markedSpans
+    if (spans) { for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i]
+      if ((span.from == null || span.from <= pos.ch) &&
+          (span.to == null || span.to >= pos.ch))
+        { markers.push(span.marker.parent || span.marker) }
+    } }
+    return markers
+  },
+  findMarks: function(from, to, filter) {
+    from = clipPos(this, from); to = clipPos(this, to)
+    var found = [], lineNo = from.line
+    this.iter(from.line, to.line + 1, function (line) {
+      var spans = line.markedSpans
+      if (spans) { for (var i = 0; i < spans.length; i++) {
+        var span = spans[i]
+        if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
+              span.from == null && lineNo != from.line ||
+              span.from != null && lineNo == to.line && span.from >= to.ch) &&
+            (!filter || filter(span.marker)))
+          { found.push(span.marker.parent || span.marker) }
+      } }
+      ++lineNo
+    })
+    return found
+  },
+  getAllMarks: function() {
+    var markers = []
+    this.iter(function (line) {
+      var sps = line.markedSpans
+      if (sps) { for (var i = 0; i < sps.length; ++i)
+        { if (sps[i].from != null) { markers.push(sps[i].marker) } } }
+    })
+    return markers
+  },
+
+  posFromIndex: function(off) {
+    var ch, lineNo = this.first, sepSize = this.lineSeparator().length
+    this.iter(function (line) {
+      var sz = line.text.length + sepSize
+      if (sz > off) { ch = off; return true }
+      off -= sz
+      ++lineNo
+    })
+    return clipPos(this, Pos(lineNo, ch))
+  },
+  indexFromPos: function (coords) {
+    coords = clipPos(this, coords)
+    var index = coords.ch
+    if (coords.line < this.first || coords.ch < 0) { return 0 }
+    var sepSize = this.lineSeparator().length
+    this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+      index += line.text.length + sepSize
+    })
+    return index
+  },
+
+  copy: function(copyHistory) {
+    var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                      this.modeOption, this.first, this.lineSep, this.direction)
+    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
+    doc.sel = this.sel
+    doc.extend = false
+    if (copyHistory) {
+      doc.history.undoDepth = this.history.undoDepth
+      doc.setHistory(this.getHistory())
+    }
+    return doc
+  },
+
+  linkedDoc: function(options) {
+    if (!options) { options = {} }
+    var from = this.first, to = this.first + this.size
+    if (options.from != null && options.from > from) { from = options.from }
+    if (options.to != null && options.to < to) { to = options.to }
+    var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction)
+    if (options.sharedHist) { copy.history = this.history
+    ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
+    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
+    copySharedMarkers(copy, findSharedMarkers(this))
+    return copy
+  },
+  unlinkDoc: function(other) {
+    var this$1 = this;
+
+    if (other instanceof CodeMirror) { other = other.doc }
+    if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+      var link = this$1.linked[i]
+      if (link.doc != other) { continue }
+      this$1.linked.splice(i, 1)
+      other.unlinkDoc(this$1)
+      detachSharedMarkers(findSharedMarkers(this$1))
+      break
+    } }
+    // If the histories were shared, split them again
+    if (other.history == this.history) {
+      var splitIds = [other.id]
+      linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true)
+      other.history = new History(null)
+      other.history.done = copyHistoryArray(this.history.done, splitIds)
+      other.history.undone = copyHistoryArray(this.history.undone, splitIds)
+    }
+  },
+  iterLinkedDocs: function(f) {linkedDocs(this, f)},
+
+  getMode: function() {return this.mode},
+  getEditor: function() {return this.cm},
+
+  splitLines: function(str) {
+    if (this.lineSep) { return str.split(this.lineSep) }
+    return splitLinesAuto(str)
+  },
+  lineSeparator: function() { return this.lineSep || "\n" },
+
+  setDirection: docMethodOp(function (dir) {
+    if (dir != "rtl") { dir = "ltr" }
+    if (dir == this.direction) { return }
+    this.direction = dir
+    this.iter(function (line) { return line.order = null; })
+    if (this.cm) { directionChanged(this.cm) }
+  })
+})
+
+// Public alias.
+Doc.prototype.eachLine = Doc.prototype.iter
+
+// Kludge to work around strange IE behavior where it'll sometimes
+// re-fire a series of drag-related events right after the drop (#1551)
+var lastDrop = 0
+
+function onDrop(e) {
+  var cm = this
+  clearDragCursor(cm)
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+    { return }
+  e_preventDefault(e)
+  if (ie) { lastDrop = +new Date }
+  var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
+  if (!pos || cm.isReadOnly()) { return }
+  // Might be a file drop, in which case we simply extract the text
+  // and insert it.
+  if (files && files.length && window.FileReader && window.File) {
+    var n = files.length, text = Array(n), read = 0
+    var loadFile = function (file, i) {
+      if (cm.options.allowDropFileTypes &&
+          indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+        { return }
+
+      var reader = new FileReader
+      reader.onload = operation(cm, function () {
+        var content = reader.result
+        if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = "" }
+        text[i] = content
+        if (++read == n) {
+          pos = clipPos(cm.doc, pos)
+          var change = {from: pos, to: pos,
+                        text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                        origin: "paste"}
+          makeChange(cm.doc, change)
+          setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)))
+        }
+      })
+      reader.readAsText(file)
+    }
+    for (var i = 0; i < n; ++i) { loadFile(files[i], i) }
+  } else { // Normal drop
+    // Don't do a replace if the drop happened inside of the selected text.
+    if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+      cm.state.draggingText(e)
+      // Ensure the editor is re-focused
+      setTimeout(function () { return cm.display.input.focus(); }, 20)
+      return
+    }
+    try {
+      var text$1 = e.dataTransfer.getData("Text")
+      if (text$1) {
+        var selected
+        if (cm.state.draggingText && !cm.state.draggingText.copy)
+          { selected = cm.listSelections() }
+        setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
+        if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+          { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag") } }
+        cm.replaceSelection(text$1, "around", "paste")
+        cm.display.input.focus()
       }
     }
-    for (var i = 0; i < cm.display.view.length; i++) {
-      var lineView = cm.display.view[i];
-      if (lineView.node == lineNode)
-        return locateNodeInLineView(lineView, node, offset);
-    }
-  }
-
-  function locateNodeInLineView(lineView, node, offset) {
-    var wrapper = lineView.text.firstChild, bad = false;
-    if (!node || !contains(wrapper, node)) return badPos(Pos(lineNo(lineView.line), 0), true);
-    if (node == wrapper) {
-      bad = true;
-      node = wrapper.childNodes[offset];
-      offset = 0;
-      if (!node) {
-        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
-        return badPos(Pos(lineNo(line), line.text.length), bad);
+    catch(e){}
+  }
+}
+
+function onDragStart(cm, e) {
+  if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+  if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+  e.dataTransfer.setData("Text", cm.getSelection())
+  e.dataTransfer.effectAllowed = "copyMove"
+
+  // Use dummy image instead of default browsers image.
+  // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+  if (e.dataTransfer.setDragImage && !safari) {
+    var img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
+    img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
+    if (presto) {
+      img.width = img.height = 1
+      cm.display.wrapper.appendChild(img)
+      // Force a relayout, or Opera won't use our image for some obscure reason
+      img._top = img.offsetTop
+    }
+    e.dataTransfer.setDragImage(img, 0, 0)
+    if (presto) { img.parentNode.removeChild(img) }
+  }
+}
+
+function onDragOver(cm, e) {
+  var pos = posFromMouse(cm, e)
+  if (!pos) { return }
+  var frag = document.createDocumentFragment()
+  drawSelectionCursor(cm, pos, frag)
+  if (!cm.display.dragCursor) {
+    cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
+    cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
+  }
+  removeChildrenAndAdd(cm.display.dragCursor, frag)
+}
+
+function clearDragCursor(cm) {
+  if (cm.display.dragCursor) {
+    cm.display.lineSpace.removeChild(cm.display.dragCursor)
+    cm.display.dragCursor = null
+  }
+}
+
+// These must be handled carefully, because naively registering a
+// handler for each editor will cause the editors to never be
+// garbage collected.
+
+function forEachCodeMirror(f) {
+  if (!document.getElementsByClassName) { return }
+  var byClass = document.getElementsByClassName("CodeMirror")
+  for (var i = 0; i < byClass.length; i++) {
+    var cm = byClass[i].CodeMirror
+    if (cm) { f(cm) }
+  }
+}
+
+var globalsRegistered = false
+function ensureGlobalHandlers() {
+  if (globalsRegistered) { return }
+  registerGlobalHandlers()
+  globalsRegistered = true
+}
+function registerGlobalHandlers() {
+  // When the window resizes, we need to refresh active editors.
+  var resizeTimer
+  on(window, "resize", function () {
+    if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+      resizeTimer = null
+      forEachCodeMirror(onResize)
+    }, 100) }
+  })
+  // When the window loses focus, we want to show the editor as blurred
+  on(window, "blur", function () { return forEachCodeMirror(onBlur); })
+}
+// Called when the window resizes
+function onResize(cm) {
+  var d = cm.display
+  if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
+    { return }
+  // Might be a text scaling operation, clear size caches.
+  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
+  d.scrollbarsClipped = false
+  cm.setSize()
+}
+
+var keyNames = {
+  3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+}
+
+// Number keys
+for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i) }
+// Alphabetic keys
+for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1) }
+// Function keys
+for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2 }
+
+var keyMap = {}
+
+keyMap.basic = {
+  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+  "Esc": "singleSelection"
+}
+// Note that the save and find-related commands aren't defined by
+// default. User code or addons can define them. Unknown commands
+// are simply ignored.
+keyMap.pcDefault = {
+  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+  fallthrough: "basic"
+}
+// Very basic readline/emacs-style bindings, which are standard on Mac.
+keyMap.emacsy = {
+  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+  "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+  "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+  "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+  "Ctrl-O": "openLine"
+}
+keyMap.macDefault = {
+  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+  fallthrough: ["basic", "emacsy"]
+}
+keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault
+
+// KEYMAP DISPATCH
+
+function normalizeKeyName(name) {
+  var parts = name.split(/-(?!$)/)
+  name = parts[parts.length - 1]
+  var alt, ctrl, shift, cmd
+  for (var i = 0; i < parts.length - 1; i++) {
+    var mod = parts[i]
+    if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true }
+    else if (/^a(lt)?$/i.test(mod)) { alt = true }
+    else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true }
+    else if (/^s(hift)?$/i.test(mod)) { shift = true }
+    else { throw new Error("Unrecognized modifier name: " + mod) }
+  }
+  if (alt) { name = "Alt-" + name }
+  if (ctrl) { name = "Ctrl-" + name }
+  if (cmd) { name = "Cmd-" + name }
+  if (shift) { name = "Shift-" + name }
+  return name
+}
+
+// This is a kludge to keep keymaps mostly working as raw objects
+// (backwards compatibility) while at the same time support features
+// like normalization and multi-stroke key bindings. It compiles a
+// new normalized keymap, and then updates the old object to reflect
+// this.
+function normalizeKeyMap(keymap) {
+  var copy = {}
+  for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+    var value = keymap[keyname]
+    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+    if (value == "...") { delete keymap[keyname]; continue }
+
+    var keys = map(keyname.split(" "), normalizeKeyName)
+    for (var i = 0; i < keys.length; i++) {
+      var val = (void 0), name = (void 0)
+      if (i == keys.length - 1) {
+        name = keys.join(" ")
+        val = value
+      } else {
+        name = keys.slice(0, i + 1).join(" ")
+        val = "..."
       }
-    }
-
-    var textNode = node.nodeType == 3 ? node : null, topNode = node;
-    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
-      textNode = node.firstChild;
-      if (offset) offset = textNode.nodeValue.length;
-    }
-    while (topNode.parentNode != wrapper) topNode = topNode.parentNode;
-    var measure = lineView.measure, maps = measure.maps;
-
-    function find(textNode, topNode, offset) {
-      for (var i = -1; i < (maps ? maps.length : 0); i++) {
-        var map = i < 0 ? measure.map : maps[i];
-        for (var j = 0; j < map.length; j += 3) {
-          var curNode = map[j + 2];
-          if (curNode == textNode || curNode == topNode) {
-            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
-            var ch = map[j] + offset;
-            if (offset < 0 || curNode != textNode) ch = map[j + (offset ? 1 : 0)];
-            return Pos(line, ch);
+      var prev = copy[name]
+      if (!prev) { copy[name] = val }
+      else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+    }
+    delete keymap[keyname]
+  } }
+  for (var prop in copy) { keymap[prop] = copy[prop] }
+  return keymap
+}
+
+function lookupKey(key, map, handle, context) {
+  map = getKeyMap(map)
+  var found = map.call ? map.call(key, context) : map[key]
+  if (found === false) { return "nothing" }
+  if (found === "...") { return "multi" }
+  if (found != null && handle(found)) { return "handled" }
+
+  if (map.fallthrough) {
+    if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+      { return lookupKey(key, map.fallthrough, handle, context) }
+    for (var i = 0; i < map.fallthrough.length; i++) {
+      var result = lookupKey(key, map.fallthrough[i], handle, context)
+      if (result) { return result }
+    }
+  }
+}
+
+// Modifier key presses don't count as 'real' key presses for the
+// purpose of keymap fallthrough.
+function isModifierKey(value) {
+  var name = typeof value == "string" ? value : keyNames[value.keyCode]
+  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+}
+
+function addModifierNames(name, event, noShift) {
+  var base = name
+  if (event.altKey && base != "Alt") { name = "Alt-" + name }
+  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name }
+  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name }
+  if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name }
+  return name
+}
+
+// Look up the name of a key as indicated by an event object.
+function keyName(event, noShift) {
+  if (presto && event.keyCode == 34 && event["char"]) { return false }
+  var name = keyNames[event.keyCode]
+  if (name == null || event.altGraphKey) { return false }
+  return addModifierNames(name, event, noShift)
+}
+
+function getKeyMap(val) {
+  return typeof val == "string" ? keyMap[val] : val
+}
+
+// Helper for deleting text near the selection(s), used to implement
+// backspace, delete, and similar functionality.
+function deleteNearSelection(cm, compute) {
+  var ranges = cm.doc.sel.ranges, kill = []
+  // Build up a set of ranges to kill first, merging overlapping
+  // ranges.
+  for (var i = 0; i < ranges.length; i++) {
+    var toKill = compute(ranges[i])
+    while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+      var replaced = kill.pop()
+      if (cmp(replaced.from, toKill.from) < 0) {
+        toKill.from = replaced.from
+        break
+      }
+    }
+    kill.push(toKill)
+  }
+  // Next, remove those actual ranges.
+  runInOp(cm, function () {
+    for (var i = kill.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") }
+    ensureCursorVisible(cm)
+  })
+}
+
+// Commands are parameter-less actions that can be performed on an
+// editor, mostly used for keybindings.
+var commands = {
+  selectAll: selectAll,
+  singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+  killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+    if (range.empty()) {
+      var len = getLine(cm.doc, range.head.line).text.length
+      if (range.head.ch == len && range.head.line < cm.lastLine())
+        { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+      else
+        { return {from: range.head, to: Pos(range.head.line, len)} }
+    } else {
+      return {from: range.from(), to: range.to()}
+    }
+  }); },
+  deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0),
+    to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+  }); }); },
+  delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+    from: Pos(range.from().line, 0), to: range.from()
+  }); }); },
+  delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    var leftPos = cm.coordsChar({left: 0, top: top}, "div")
+    return {from: leftPos, to: range.from()}
+  }); },
+  delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+    return {from: range.from(), to: rightPos }
+  }); },
+  undo: function (cm) { return cm.undo(); },
+  redo: function (cm) { return cm.redo(); },
+  undoSelection: function (cm) { return cm.undoSelection(); },
+  redoSelection: function (cm) { return cm.redoSelection(); },
+  goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+  goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+  goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+    {origin: "+move", bias: 1}
+  ); },
+  goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+    {origin: "+move", bias: -1}
+  ); },
+  goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+  }, sel_move); },
+  goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    return cm.coordsChar({left: 0, top: top}, "div")
+  }, sel_move); },
+  goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+    var top = cm.charCoords(range.head, "div").top + 5
+    var pos = cm.coordsChar({left: 0, top: top}, "div")
+    if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+    return pos
+  }, sel_move); },
+  goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+  goLineDown: function (cm) { return cm.moveV(1, "line"); },
+  goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+  goPageDown: function (cm) { return cm.moveV(1, "page"); },
+  goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+  goCharRight: function (cm) { return cm.moveH(1, "char"); },
+  goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+  goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+  goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+  goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+  goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+  goWordRight: function (cm) { return cm.moveH(1, "word"); },
+  delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
+  delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+  delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+  delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+  delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+  delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+  indentAuto: function (cm) { return cm.indentSelection("smart"); },
+  indentMore: function (cm) { return cm.indentSelection("add"); },
+  indentLess: function (cm) { return cm.indentSelection("subtract"); },
+  insertTab: function (cm) { return cm.replaceSelection("\t"); },
+  insertSoftTab: function (cm) {
+    var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize
+    for (var i = 0; i < ranges.length; i++) {
+      var pos = ranges[i].from()
+      var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize)
+      spaces.push(spaceStr(tabSize - col % tabSize))
+    }
+    cm.replaceSelections(spaces)
+  },
+  defaultTab: function (cm) {
+    if (cm.somethingSelected()) { cm.indentSelection("add") }
+    else { cm.execCommand("insertTab") }
+  },
+  // Swap the two chars left and right of each selection's head.
+  // Move cursor behind the two swapped characters afterwards.
+  //
+  // Doesn't consider line feeds a character.
+  // Doesn't scan more than one line above to find a character.
+  // Doesn't do anything on an empty line.
+  // Doesn't do anything with non-empty selections.
+  transposeChars: function (cm) { return runInOp(cm, function () {
+    var ranges = cm.listSelections(), newSel = []
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) { continue }
+      var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text
+      if (line) {
+        if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1) }
+        if (cur.ch > 0) {
+          cur = new Pos(cur.line, cur.ch + 1)
+          cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                          Pos(cur.line, cur.ch - 2), cur, "+transpose")
+        } else if (cur.line > cm.doc.first) {
+          var prev = getLine(cm.doc, cur.line - 1).text
+          if (prev) {
+            cur = new Pos(cur.line, 1)
+            cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                            prev.charAt(prev.length - 1),
+                            Pos(cur.line - 1, prev.length - 1), cur, "+transpose")
           }
         }
       }
-    }
-    var found = find(textNode, topNode, offset);
-    if (found) return badPos(found, bad);
-
-    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
-    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
-      found = find(after, after.firstChild, 0);
-      if (found)
-        return badPos(Pos(found.line, found.ch - dist), bad);
-      else
-        dist += after.textContent.length;
-    }
-    for (var before = topNode.previousSibling, dist = offset; before; before = before.previousSibling) {
-      found = find(before, before.firstChild, -1);
-      if (found)
-        return badPos(Pos(found.line, found.ch + dist), bad);
-      else
-        dist += after.textContent.length;
-    }
-  }
-
-  function domTextBetween(cm, from, to, fromLine, toLine) {
-    var text = "", closing = false, lineSep = cm.doc.lineSeparator();
-    function recognizeMarker(id) { return function(marker) { return marker.id == id; }; }
-    function walk(node) {
-      if (node.nodeType == 1) {
-        var cmText = node.getAttribute("cm-text");
-        if (cmText != null) {
-          if (cmText == "") cmText = node.textContent.replace(/\u200b/g, "");
-          text += cmText;
-          return;
-        }
-        var markerID = node.getAttribute("cm-marker"), range;
-        if (markerID) {
-          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
-          if (found.length && (range = found[0].find()))
-            text += getBetween(cm.doc, range.from, range.to).join(lineSep);
-          return;
-        }
-        if (node.getAttribute("contenteditable") == "false") return;
-        for (var i = 0; i < node.childNodes.length; i++)
-          walk(node.childNodes[i]);
-        if (/^(pre|div|p)$/i.test(node.nodeName))
-          closing = true;
-      } else if (node.nodeType == 3) {
-        var val = node.nodeValue;
-        if (!val) return;
-        if (closing) {
-          text += lineSep;
-          closing = false;
-        }
-        text += val;
-      }
-    }
-    for (;;) {
-      walk(from);
-      if (from == to) break;
-      from = from.nextSibling;
-    }
-    return text;
-  }
-
-  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
-
-  // SELECTION / CURSOR
-
-  // Selection objects are immutable. A new one is created every time
-  // the selection changes. A selection is one or more non-overlapping
-  // (and non-touching) ranges, sorted, and an integer that indicates
-  // which one is the primary selection (the one that's scrolled into
-  // view, that getCursor returns, etc).
-  function Selection(ranges, primIndex) {
-    this.ranges = ranges;
-    this.primIndex = primIndex;
-  }
-
-  Selection.prototype = {
-    primary: function() { return this.ranges[this.primIndex]; },
-    equals: function(other) {
-      if (other == this) return true;
-      if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false;
-      for (var i = 0; i < this.ranges.length; i++) {
-        var here = this.ranges[i], there = other.ranges[i];
-        if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false;
-      }
-      return true;
-    },
-    deepCopy: function() {
-      for (var out = [], i = 0; i < this.ranges.length; i++)
-        out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head));
-      return new Selection(out, this.primIndex);
-    },
-    somethingSelected: function() {
-      for (var i = 0; i < this.ranges.length; i++)
-        if (!this.ranges[i].empty()) return true;
-      return false;
-    },
-    contains: function(pos, end) {
-      if (!end) end = pos;
-      for (var i = 0; i < this.ranges.length; i++) {
-        var range = this.ranges[i];
-        if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
-          return i;
-      }
-      return -1;
-    }
-  };
-
-  function Range(anchor, head) {
-    this.anchor = anchor; this.head = head;
-  }
-
-  Range.prototype = {
-    from: function() { return minPos(this.anchor, this.head); },
-    to: function() { return maxPos(this.anchor, this.head); },
-    empty: function() {
-      return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch;
-    }
-  };
-
-  // Take an unsorted, potentially overlapping set of ranges, and
-  // build a selection out of it. 'Consumes' ranges array (modifying
-  // it).
-  function normalizeSelection(ranges, primIndex) {
-    var prim = ranges[primIndex];
-    ranges.sort(function(a, b) { return cmp(a.from(), b.from()); });
-    primIndex = indexOf(ranges, prim);
-    for (var i = 1; i < ranges.length; i++) {
-      var cur = ranges[i], prev = ranges[i - 1];
-      if (cmp(prev.to(), cur.from()) >= 0) {
-        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
-        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
-        if (i <= primIndex) --primIndex;
-        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
-      }
-    }
-    return new Selection(ranges, primIndex);
-  }
-
-  function simpleSelection(anchor, head) {
-    return new Selection([new Range(anchor, head || anchor)], 0);
-  }
-
-  // Most of the external API clips given positions to make sure they
-  // actually exist within the document.
-  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
-  function clipPos(doc, pos) {
-    if (pos.line < doc.first) return Pos(doc.first, 0);
-    var last = doc.first + doc.size - 1;
-    if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
-    return clipToLen(pos, getLine(doc, pos.line).text.length);
-  }
-  function clipToLen(pos, linelen) {
-    var ch = pos.ch;
-    if (ch == null || ch > linelen) return Pos(pos.line, linelen);
-    else if (ch < 0) return Pos(pos.line, 0);
-    else return pos;
-  }
-  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
-  function clipPosArray(doc, array) {
-    for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]);
-    return out;
-  }
-
-  // SELECTION UPDATES
-
-  // The 'scroll' parameter given to many of these indicated whether
-  // the new cursor position should be scrolled into view after
-  // modifying the selection.
-
-  // If shift is held or the extend flag is set, extends a range to
-  // include a given position (and optionally a second position).
-  // Otherwise, simply returns the range between the given positions.
-  // Used for cursor motion and such.
-  function extendRange(doc, range, head, other) {
-    if (doc.cm && doc.cm.display.shift || doc.extend) {
-      var anchor = range.anchor;
-      if (other) {
-        var posBefore = cmp(head, anchor) < 0;
-        if (posBefore != (cmp(other, anchor) < 0)) {
-          anchor = head;
-          head = other;
-        } else if (posBefore != (cmp(head, other) < 0)) {
-          head = other;
-        }
-      }
-      return new Range(anchor, head);
-    } else {
-      return new Range(other || head, head);
-    }
-  }
-
-  // Extend the primary selection range, discard the rest.
-  function extendSelection(doc, head, other, options) {
-    setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options);
-  }
-
-  // Extend all selections (pos is an array of selections with length
-  // equal the number of selections)
-  function extendSelections(doc, heads, options) {
-    for (var out = [], i = 0; i < doc.sel.ranges.length; i++)
-      out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null);
-    var newSel = normalizeSelection(out, doc.sel.primIndex);
-    setSelection(doc, newSel, options);
-  }
-
-  // Updates a single range in the selection.
-  function replaceOneSelection(doc, i, range, options) {
-    var ranges = doc.sel.ranges.slice(0);
-    ranges[i] = range;
-    setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
-  }
-
-  // Reset the selection to a single range.
-  function setSimpleSelection(doc, anchor, head, options) {
-    setSelection(doc, simpleSelection(anchor, head), options);
-  }
-
-  // Give beforeSelectionChange handlers a change to influence a
-  // selection update.
-  function filterSelectionChange(doc, sel, options) {
-    var obj = {
-      ranges: sel.ranges,
-      update: function(ranges) {
-        this.ranges = [];
-        for (var i = 0; i < ranges.length; i++)
-          this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
-                                     clipPos(doc, ranges[i].head));
-      },
-      origin: options && options.origin
-    };
-    signal(doc, "beforeSelectionChange", doc, obj);
-    if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
-    if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1);
-    else return sel;
-  }
-
-  function setSelectionReplaceHistory(doc, sel, options) {
-    var done = doc.history.done, last = lst(done);
-    if (last && last.ranges) {
-      done[done.length - 1] = sel;
-      setSelectionNoUndo(doc, sel, options);
-    } else {
-      setSelection(doc, sel, options);
-    }
-  }
-
-  // Set a new selection.
-  function setSelection(doc, sel, options) {
-    setSelectionNoUndo(doc, sel, options);
-    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
-  }
-
-  function setSelectionNoUndo(doc, sel, options) {
-    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
-      sel = filterSelectionChange(doc, sel, options);
-
-    var bias = options && options.bias ||
-      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
-    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
-
-    if (!(options && options.scroll === false) && doc.cm)
-      ensureCursorVisible(doc.cm);
-  }
-
-  function setSelectionInner(doc, sel) {
-    if (sel.equals(doc.sel)) return;
-
-    doc.sel = sel;
-
-    if (doc.cm) {
-      doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
-      signalCursorActivity(doc.cm);
-    }
-    signalLater(doc, "cursorActivity", doc);
-  }
-
-  // Verify that the selection does not partially select any atomic
-  // marked ranges.
-  function reCheckSelection(doc) {
-    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll);
-  }
-
-  // Return a selection that does not partially select any atomic
-  // ranges.
-  function skipAtomicInSelection(doc, sel, bias, mayClear) {
-    var out;
-    for (var i = 0; i < sel.ranges.length; i++) {
-      var range = sel.ranges[i];
-      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
-      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
-      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
-      if (out || newAnchor != range.anchor || newHead != range.head) {
-        if (!out) out = sel.ranges.slice(0, i);
-        out[i] = new Range(newAnchor, newHead);
-      }
-    }
-    return out ? normalizeSelection(out, sel.primIndex) : sel;
-  }
-
-  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
-    var line = getLine(doc, pos.line);
-    if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
-      var sp = line.markedSpans[i], m = sp.marker;
-      if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
-          (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
-        if (mayClear) {
-          signal(m, "beforeCursorEnter");
-          if (m.explicitlyCleared) {
-            if (!line.markedSpans) break;
-            else {--i; continue;}
-          }
-        }
-        if (!m.atomic) continue;
-
-        if (oldPos) {
-          var near = m.find(dir < 0 ? 1 : -1), diff;
-          if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
-            near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null);
-          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
-            return skipAtomicInner(doc, near, pos, dir, mayClear);
-        }
-
-        var far = m.find(dir < 0 ? -1 : 1);
-        if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
-          far = movePos(doc, far, dir, far.line == pos.line ? line : null);
-        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null;
-      }
-    }
-    return pos;
-  }
-
-  // Ensure a given position is not inside an atomic range.
-  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
-    var dir = bias || 1;
-    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
-        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
-        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
-        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
-    if (!found) {
-      doc.cantEdit = true;
-      return Pos(doc.first, 0);
-    }
-    return found;
-  }
-
-  function movePos(doc, pos, dir, line) {
-    if (dir < 0 && pos.ch == 0) {
-      if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1));
-      else return null;
-    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
-      if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0);
-      else return null;
-    } else {
-      return new Pos(pos.line, pos.ch + dir);
-    }
-  }
-
-  // SELECTION DRAWING
-
-  function updateSelection(cm) {
-    cm.display.input.showSelection(cm.display.input.prepareSelection());
-  }
-
-  function prepareSelection(cm, primary) {
-    var doc = cm.doc, result = {};
-    var curFragment = result.cursors = document.createDocumentFragment();
-    var selFragment = result.selection = document.createDocumentFragment();
-
-    for (var i = 0; i < doc.sel.ranges.length; i++) {
-      if (primary === false && i == doc.sel.primIndex) continue;
-      var range = doc.sel.ranges[i];
-      if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue;
-      var collapsed = range.empty();
-      if (collapsed || cm.options.showCursorWhenSelecting)
-        drawSelectionCursor(cm, range.head, curFragment);
-      if (!collapsed)
-        drawSelectionRange(cm, range, selFragment);
-    }
-    return result;
-  }
-
-  // Draws a cursor for the given range
-  function drawSelectionCursor(cm, head, output) {
-    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
-
-    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
-    cursor.style.left = pos.left + "px";
-    cursor.style.top = pos.top + "px";
-    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
-
-    if (pos.other) {
-      // Secondary cursor, shown when on a 'jump' in bi-directional text
-      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
-      otherCursor.style.display = "";
-      otherCursor.style.left = pos.other.left + "px";
-      otherCursor.style.top = pos.other.top + "px";
-      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
-    }
-  }
-
-  // Draws the given range as a highlighted selection
-  function drawSelectionRange(cm, range, output) {
-    var display = cm.display, doc = cm.doc;
-    var fragment = document.createDocumentFragment();
-    var padding = paddingH(cm.display), leftSide = padding.left;
-    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
-
-    function add(left, top, width, bottom) {
-      if (top < 0) top = 0;
-      top = Math.round(top);
-      bottom = Math.round(bottom);
-      fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
-                               "px; top: " + top + "px; width: " + (width == null ? rightSide - left : width) +
-                               "px; height: " + (bottom - top) + "px"));
-    }
-
-    function drawForLine(line, fromArg, toArg) {
-      var lineObj = getLine(doc, line);
-      var lineLen = lineObj.text.length;
-      var start, end;
-      function coords(ch, bias) {
-        return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
-      }
-
-      iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
-        var leftPos = coords(from, "left"), rightPos, left, right;
-        if (from == to) {
-          rightPos = leftPos;
-          left = right = leftPos.left;
-        } else {
-          rightPos = coords(to - 1, "right");
-          if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
-          left = leftPos.left;
-          right = rightPos.right;
-        }
-        if (fromArg == null && from == 0) left = leftSide;
-        if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
-          add(left, leftPos.top, null, leftPos.bottom);
-          left = leftSide;
-          if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
-        }
-        if (toArg == null && to == lineLen) right = rightSide;
-        if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
-          start = leftPos;
-        if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
-          end = rightPos;
-        if (left < leftSide + 1) left = leftSide;
-        add(left, rightPos.top, right - left, rightPos.bottom);
-      });
-      return {start: start, end: end};
-    }
-
-    var sFrom = range.from(), sTo = range.to();
-    if (sFrom.line == sTo.line) {
-      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
-    } else {
-      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
-      var singleVLine = visualLine(fromLine) == visualLine(toLine);
-      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
-      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
-      if (singleVLine) {
-        if (leftEnd.top < rightStart.top - 2) {
-          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
-          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
-        } else {
-          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
-        }
-      }
-      if (leftEnd.bottom < rightStart.top)
-        add(leftSide, leftEnd.bottom, null, rightStart.top);
-    }
-
-    output.appendChild(fragment);
-  }
-
-  // Cursor-blinking
-  function restartBlink(cm) {
-    if (!cm.state.focused) return;
-    var display = cm.display;
-    clearInterval(display.blinker);
-    var on = true;
-    display.cursorDiv.style.visibility = "";
-    if (cm.options.cursorBlinkRate > 0)
-      display.blinker = setInterval(function() {
-        display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
-      }, cm.options.cursorBlinkRate);
-    else if (cm.options.cursorBlinkRate < 0)
-      display.cursorDiv.style.visibility = "hidden";
-  }
-
-  // HIGHLIGHT WORKER
-
-  function startWorker(cm, time) {
-    if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
-      cm.state.highlight.set(time, bind(highlightWorker, cm));
-  }
-
-  function highlightWorker(cm) {
-    var doc = cm.doc;
-    if (doc.frontier < doc.first) doc.frontier = doc.first;
-    if (doc.frontier >= cm.display.viewTo) return;
-    var end = +new Date + cm.options.workTime;
-    var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
-    var changedLines = [];
-
-    doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) {
-      if (doc.frontier >= cm.display.viewFrom) { // Visible
-        var oldStyles = line.styles, tooLong = line.text.length > cm.options.maxHighlightLength;
-        var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true);
-        line.styles = highlighted.styles;
-        var oldCls = line.styleClasses, newCls = highlighted.classes;
-        if (newCls) line.styleClasses = newCls;
-        else if (oldCls) line.styleClasses = null;
-        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
-          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
-        for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
-        if (ischange) changedLines.push(doc.frontier);
-        line.stateAfter = tooLong ? state : copyState(doc.mode, state);
-      } else {
-        if (line.text.length <= cm.options.maxHighlightLength)
-          processLine(cm, line.text, state);
-        line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
-      }
-      ++doc.frontier;
-      if (+new Date > end) {
-        startWorker(cm, cm.options.workDelay);
-        return true;
-      }
-    });
-    if (changedLines.length) runInOp(cm, function() {
-      for (var i = 0; i < changedLines.length; i++)
-        regLineChange(cm, changedLines[i], "text");
-    });
-  }
-
-  // Finds the line to start with when starting a parse. Tries to
-  // find a line with a stateAfter, so that it can start with a
-  // valid state. If that fails, it returns the line with the
-  // smallest indentation, which tends to need the least context to
-  // parse correctly.
-  function findStartLine(cm, n, precise) {
-    var minindent, minline, doc = cm.doc;
-    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
-    for (var search = n; search > lim; --search) {
-      if (search <= doc.first) return doc.first;
-      var line = getLine(doc, search - 1);
-      if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
-      var indented = countColumn(line.text, null, cm.options.tabSize);
-      if (minline == null || minindent > indented) {
-        minline = search - 1;
-        minindent = indented;
-      }
-    }
-    return minline;
-  }
-
-  function getStateBefore(cm, n, precise) {
-    var doc = cm.doc, display = cm.display;
-    if (!doc.mode.startState) return true;
-    var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
-    if (!state) state = startState(doc.mode);
-    else state = copyState(doc.mode, state);
-    doc.iter(pos, n, function(line) {
-      processLine(cm, line.text, state);
-      var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo;
-      line.stateAfter = save ? copyState(doc.mode, state) : null;
-      ++pos;
-    });
-    if (precise) doc.frontier = pos;
-    return state;
-  }
-
-  // POSITION MEASUREMENT
-
-  function paddingTop(display) {return display.lineSpace.offsetTop;}
-  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
-  function paddingH(display) {
-    if (display.cachedPaddingH) return display.cachedPaddingH;
-    var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
-    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
-    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
-    if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data;
-    return data;
-  }
-
-  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth; }
-  function displayWidth(cm) {
-    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth;
-  }
-  function displayHeight(cm) {
-    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight;
-  }
-
-  // Ensure the lineView.wrapping.heights array is populated. This is
-  // an array of bottom offsets for the lines that make up a drawn
-  // line. When lineWrapping is on, there might be more than one
-  // height.
-  function ensureLineHeights(cm, lineView, rect) {
-    var wrapping = cm.options.lineWrapping;
-    var curWidth = wrapping && displayWidth(cm);
-    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
-      var heights = lineView.measure.heights = [];
-      if (wrapping) {
-        lineView.measure.width = curWidth;
-        var rects = lineView.text.firstChild.getClientRects();
-        for (var i = 0; i < rects.length - 1; i++) {
-          var cur = rects[i], next = rects[i + 1];
-          if (Math.abs(cur.bottom - next.bottom) > 2)
-            heights.push((cur.bottom + next.top) / 2 - rect.top);
-        }
-      }
-      heights.push(rect.bottom - rect.top);
-    }
-  }
-
-  // Find a line map (mapping character offsets to text nodes) and a
-  // measurement cache for the given line number. (A line view might
-  // contain multiple lines when collapsed ranges are present.)
-  function mapFromLineView(lineView, line, lineN) {
-    if (lineView.line == line)
-      return {map: lineView.measure.map, cache: lineView.measure.cache};
-    for (var i = 0; i < lineView.rest.length; i++)
-      if (lineView.rest[i] == line)
-        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]};
-    for (var i = 0; i < lineView.rest.length; i++)
-      if (lineNo(lineView.rest[i]) > lineN)
-        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i], before: true};
-  }
-
-  // Render a line into the hidden node display.externalMeasured. Used
-  // when measurement is needed for a line that's not in the viewport.
-  function updateExternalMeasurement(cm, line) {
-    line = visualLine(line);
-    var lineN = lineNo(line);
-    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
-    view.lineN = lineN;
-    var built = view.built = buildLineContent(cm, view);
-    view.text = built.pre;
-    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
-    return view;
-  }
-
-  // Get a {top, bottom, left, right} box (in line-local coordinates)
-  // for a given character.
-  function measureChar(cm, line, ch, bias) {
-    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias);
-  }
-
-  // Find a line view that corresponds to the given line number.
-  function findViewForLine(cm, lineN) {
-    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
-      return cm.display.view[findViewIndex(cm, lineN)];
-    var ext = cm.display.externalMeasured;
-    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
-      return ext;
-  }
-
-  // Measurement can be split in two steps, the set-up work that
-  // applies to the whole line, and the measurement of the actual
-  // character. Functions like coordsChar, that need to do a lot of
-  // measurements in a row, can thus ensure that the set-up work is
-  // only done once.
-  function prepareMeasureForLine(cm, line) {
-    var lineN = lineNo(line);
-    var view = findViewForLine(cm, lineN);
-    if (view && !view.text) {
-      view = null;
-    } else if (view && view.changes) {
-      updateLineForChanges(cm, view, lineN, getDimensions(cm));
-      cm.curOp.forceUpdate = true;
-    }
-    if (!view)
-      view = updateExternalMeasurement(cm, line);
-
-    var info = mapFromLineView(view, line, lineN);
-    return {
-      line: line, view: view, rect: null,
-      map: info.map, cache: info.cache, before: info.before,
-      hasHeights: false
-    };
-  }
-
-  // Given a prepared measurement object, measures the position of an
-  // actual character (or fetches it from the cache).
-  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
-    if (prepared.before) ch = -1;
-    var key = ch + (bias || ""), found;
-    if (prepared.cache.hasOwnProperty(key)) {
-      found = prepared.cache[key];
-    } else {
-      if (!prepared.rect)
-        prepared.rect = prepared.view.text.getBoundingClientRect();
-      if (!prepared.hasHeights) {
-        ensureLineHeights(cm, prepared.view, prepared.rect);
-        prepared.hasHeights = true;
+      newSel.push(new Range(cur, cur))
+    }
+    cm.setSelections(newSel)
+  }); },
+  newlineAndIndent: function (cm) { return runInOp(cm, function () {
+    var sels = cm.listSelections()
+    for (var i = sels.length - 1; i >= 0; i--)
+      { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input") }
+    sels = cm.listSelections()
+    for (var i$1 = 0; i$1 < sels.length; i$1++)
+      { cm.indentLine(sels[i$1].from().line, null, true) }
+    ensureCursorVisible(cm)
+  }); },
+  openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+  toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+}
+
+
+function lineStart(cm, lineN) {
+  var line = getLine(cm.doc, lineN)
+  var visual = visualLine(line)
+  if (visual != line) { lineN = lineNo(visual) }
+  return endOfLine(true, cm, visual, lineN, 1)
+}
+function lineEnd(cm, lineN) {
+  var line = getLine(cm.doc, lineN)
+  var visual = visualLineEnd(line)
+  if (visual != line) { lineN = lineNo(visual) }
+  return endOfLine(true, cm, line, lineN, -1)
+}
+function lineStartSmart(cm, pos) {
+  var start = lineStart(cm, pos.line)
+  var line = getLine(cm.doc, start.line)
+  var order = getOrder(line, cm.doc.direction)
+  if (!order || order[0].level == 0) {
+    var firstNonWS = Math.max(0, line.text.search(/\S/))
+    var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch
+    return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+  }
+  return start
+}
+
+// Run a handler that was bound to a key.
+function doHandleBinding(cm, bound, dropShift) {
+  if (typeof bound == "string") {
+    bound = commands[bound]
+    if (!bound) { return false }
+  }
+  // Ensure previous input has been read, so that the handler sees a
+  // consistent view of the document
+  cm.display.input.ensurePolled()
+  var prevShift = cm.display.shift, done = false
+  try {
+    if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+    if (dropShift) { cm.display.shift = false }
+    done = bound(cm) != Pass
+  } finally {
+    cm.display.shift = prevShift
+    cm.state.suppressEdits = false
+  }
+  return done
+}
+
+function lookupKeyForEditor(cm, name, handle) {
+  for (var i = 0; i < cm.state.keyMaps.length; i++) {
+    var result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
+    if (result) { return result }
+  }
+  return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+    || lookupKey(name, cm.options.keyMap, handle, cm)
+}
+
+// Note that, despite the name, this function is also used to check
+// for bound mouse clicks.
+
+var stopSeq = new Delayed
+function dispatchKey(cm, name, e, handle) {
+  var seq = cm.state.keySeq
+  if (seq) {
+    if (isModifierKey(name)) { return "handled" }
+    stopSeq.set(50, function () {
+      if (cm.state.keySeq == seq) {
+        cm.state.keySeq = null
+        cm.display.input.reset()
       }
-      found = measureCharInner(cm, prepared, ch, bias);
-      if (!found.bogus) prepared.cache[key] = found;
-    }
-    return {left: found.left, right: found.right,
-            top: varHeight ? found.rtop : found.top,
-            bottom: varHeight ? found.rbottom : found.bottom};
-  }
-
-  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
-
-  function nodeAndOffsetInLineMap(map, ch, bias) {
-    var node, start, end, collapse;
-    // First, search the line map for the text node corresponding to,
-    // or closest to, the target character.
-    for (var i = 0; i < map.length; i += 3) {
-      var mStart = map[i], mEnd = map[i + 1];
-      if (ch < mStart) {
-        start = 0; end = 1;
-        collapse = "left";
-      } else if (ch < mEnd) {
-        start = ch - mStart;
-        end = start + 1;
-      } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
-        end = mEnd - mStart;
-        start = end - 1;
-        if (ch >= mEnd) collapse = "right";
-      }
-      if (start != null) {
-        node = map[i + 2];
-        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
-          collapse = bias;
-        if (bias == "left" && start == 0)
-          while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
-            node = map[(i -= 3) + 2];
-            collapse = "left";
-          }
-        if (bias == "right" && start == mEnd - mStart)
-          while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
-            node = map[(i += 3) + 2];
-            collapse = "right";
-          }
-        break;
-      }
-    }
-    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd};
-  }
-
-  function measureCharInner(cm, prepared, ch, bias) {
-    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
-    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
-
-    var rect;
-    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
-      for (var i = 0; i < 4; i++) { // Retry a maximum of 4 times when nonsense rectangles are returned
-        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) --start;
-        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) ++end;
-        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart) {
-          rect = node.parentNode.getBoundingClientRect();
-        } else if (ie && cm.options.lineWrapping) {
-          var rects = range(node, start, end).getClientRects();
-          if (rects.length)
-            rect = rects[bias == "right" ? rects.length - 1 : 0];
-          else
-            rect = nullRect;
-        } else {
-          rect = range(node, start, end).getBoundingClientRect() || nullRect;
-        }
-        if (rect.left || rect.right || start == 0) break;
-        end = start;
-        start = start - 1;
-        collapse = "right";
-      }
-      if (ie && ie_version < 11) rect = maybeUpdateRectForZooming(cm.display.measure, rect);
-    } else { // If it is a widget, simply get the box for the whole widget.
-      if (start > 0) collapse = bias = "right";
-      var rects;
-      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
-        rect = rects[bias == "right" ? rects.length - 1 : 0];
-      else
-        rect = node.getBoundingClientRect();
-    }
-    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
-      var rSpan = node.parentNode.getClientRects()[0];
-      if (rSpan)
-        rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom};
+    })
+    name = seq + " " + name
+  }
+  var result = lookupKeyForEditor(cm, name, handle)
+
+  if (result == "multi")
+    { cm.state.keySeq = name }
+  if (result == "handled")
+    { signalLater(cm, "keyHandled", cm, name, e) }
+
+  if (result == "handled" || result == "multi") {
+    e_preventDefault(e)
+    restartBlink(cm)
+  }
+
+  if (seq && !result && /\'$/.test(name)) {
+    e_preventDefault(e)
+    return true
+  }
+  return !!result
+}
+
+// Handle a key from the keydown event.
+function handleKeyBinding(cm, e) {
+  var name = keyName(e, true)
+  if (!name) { return false }
+
+  if (e.shiftKey && !cm.state.keySeq) {
+    // First try to resolve full name (including 'Shift-'). Failing
+    // that, see if there is a cursor-motion command (starting with
+    // 'go') bound to the keyname without 'Shift-'.
+    return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+        || dispatchKey(cm, name, e, function (b) {
+             if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+               { return doHandleBinding(cm, b) }
+           })
+  } else {
+    return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+  }
+}
+
+// Handle a key from the keypress event
+function handleCharBinding(cm, e, ch) {
+  return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+}
+
+var lastStoppedKey = null
+function onKeyDown(e) {
+  var cm = this
+  cm.curOp.focus = activeElt()
+  if (signalDOMEvent(cm, e)) { return }
+  // IE does strange things with escape.
+  if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false }
+  var code = e.keyCode
+  cm.display.shift = code == 16 || e.shiftKey
+  var handled = handleKeyBinding(cm, e)
+  if (presto) {
+    lastStoppedKey = handled ? code : null
+    // Opera has no cut event... we try to at least catch the key combo
+    if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+      { cm.replaceSelection("", null, "cut") }
+  }
+
+  // Turn mouse into crosshair when Alt is held on Mac.
+  if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+    { showCrossHair(cm) }
+}
+
+function showCrossHair(cm) {
+  var lineDiv = cm.display.lineDiv
+  addClass(lineDiv, "CodeMirror-crosshair")
+
+  function up(e) {
+    if (e.keyCode == 18 || !e.altKey) {
+      rmClass(lineDiv, "CodeMirror-crosshair")
+      off(document, "keyup", up)
+      off(document, "mouseover", up)
+    }
+  }
+  on(document, "keyup", up)
+  on(document, "mouseover", up)
+}
+
+function onKeyUp(e) {
+  if (e.keyCode == 16) { this.doc.sel.shift = false }
+  signalDOMEvent(this, e)
+}
+
+function onKeyPress(e) {
+  var cm = this
+  if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+  var keyCode = e.keyCode, charCode = e.charCode
+  if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+  if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+  var ch = String.fromCharCode(charCode == null ? keyCode : charCode)
+  // Some browsers fire keypress events for backspace
+  if (ch == "\x08") { return }
+  if (handleCharBinding(cm, e, ch)) { return }
+  cm.display.input.onKeyPress(e)
+}
+
+var DOUBLECLICK_DELAY = 400
+
+var PastClick = function(time, pos, button) {
+  this.time = time
+  this.pos = pos
+  this.button = button
+};
+
+PastClick.prototype.compare = function (time, pos, button) {
+  return this.time + DOUBLECLICK_DELAY > time &&
+    cmp(pos, this.pos) == 0 && button == this.button
+};
+
+var lastClick;
+var lastDoubleClick;
+function clickRepeat(pos, button) {
+  var now = +new Date
+  if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+    lastClick = lastDoubleClick = null
+    return "triple"
+  } else if (lastClick && lastClick.compare(now, pos, button)) {
+    lastDoubleClick = new PastClick(now, pos, button)
+    lastClick = null
+    return "double"
+  } else {
+    lastClick = new PastClick(now, pos, button)
+    lastDoubleClick = null
+    return "single"
+  }
+}
+
+// A mouse down can be a single click, double click, triple click,
+// start of selection drag, start of text drag, new cursor
+// (ctrl-click), rectangle drag (alt-drag), or xwin
+// middle-click-paste. Or it might be a click on something we should
+// not interfere with, such as a scrollbar or widget.
+function onMouseDown(e) {
+  var cm = this, display = cm.display
+  if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+  display.input.ensurePolled()
+  display.shift = e.shiftKey
+
+  if (eventInWidget(display, e)) {
+    if (!webkit) {
+      // Briefly turn off draggability, to allow widgets to do
+      // normal dragging things.
+      display.scroller.draggable = false
+      setTimeout(function () { return display.scroller.draggable = true; }, 100)
+    }
+    return
+  }
+  if (clickInGutter(cm, e)) { return }
+  var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single"
+  window.focus()
+
+  // #3261: make sure, that we're not starting a second selection
+  if (button == 1 && cm.state.selectingText)
+    { cm.state.selectingText(e) }
+
+  if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+  if (button == 1) {
+    if (pos) { leftButtonDown(cm, pos, repeat, e) }
+    else if (e_target(e) == display.scroller) { e_preventDefault(e) }
+  } else if (button == 2) {
+    if (pos) { extendSelection(cm.doc, pos) }
+    setTimeout(function () { return display.input.focus(); }, 20)
+  } else if (button == 3) {
+    if (captureRightClick) { onContextMenu(cm, e) }
+    else { delayBlurEvent(cm) }
+  }
+}
+
+function handleMappedButton(cm, button, pos, repeat, event) {
+  var name = "Click"
+  if (repeat == "double") { name = "Double" + name }
+  else if (repeat == "triple") { name = "Triple" + name }
+  name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name
+
+  return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+    if (typeof bound == "string") { bound = commands[bound] }
+    if (!bound) { return false }
+    var done = false
+    try {
+      if (cm.isReadOnly()) { cm.state.suppressEdits = true }
+      done = bound(cm, pos) != Pass
+    } finally {
+      cm.state.suppressEdits = false
+    }
+    return done
+  })
+}
+
+function configureMouse(cm, repeat, event) {
+  var option = cm.getOption("configureMouse")
+  var value = option ? option(cm, repeat, event) : {}
+  if (value.unit == null) {
+    var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey
+    value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line"
+  }
+  if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey }
+  if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey }
+  if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey) }
+  return value
+}
+
+function leftButtonDown(cm, pos, repeat, event) {
+  if (ie) { setTimeout(bind(ensureFocus, cm), 0) }
+  else { cm.curOp.focus = activeElt() }
+
+  var behavior = configureMouse(cm, repeat, event)
+
+  var sel = cm.doc.sel, contained
+  if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+      repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+      (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+      (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+    { leftButtonStartDrag(cm, event, pos, behavior) }
+  else
+    { leftButtonSelect(cm, event, pos, behavior) }
+}
+
+// Start a text drag. When it ends, see if any dragging actually
+// happen, and treat as a click if it didn't.
+function leftButtonStartDrag(cm, event, pos, behavior) {
+  var display = cm.display, moved = false
+  var dragEnd = operation(cm, function (e) {
+    if (webkit) { display.scroller.draggable = false }
+    cm.state.draggingText = false
+    off(document, "mouseup", dragEnd)
+    off(document, "mousemove", mouseMove)
+    off(display.scroller, "dragstart", dragStart)
+    off(display.scroller, "drop", dragEnd)
+    if (!moved) {
+      e_preventDefault(e)
+      if (!behavior.addNew)
+        { extendSelection(cm.doc, pos, null, null, behavior.extend) }
+      // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+      if (webkit || ie && ie_version == 9)
+        { setTimeout(function () {document.body.focus(); display.input.focus()}, 20) }
       else
-        rect = nullRect;
-    }
-
-    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
-    var mid = (rtop + rbot) / 2;
-    var heights = prepared.view.measure.heights;
-    for (var i = 0; i < heights.length - 1; i++)
-      if (mid < heights[i]) break;
-    var top = i ? heights[i - 1] : 0, bot = heights[i];
-    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
-                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
-                  top: top, bottom: bot};
-    if (!rect.left && !rect.right) result.bogus = true;
-    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
-
-    return result;
-  }
-
-  // Work around problem with bounding client rects on ranges being
-  // returned incorrectly when zoomed on IE10 and below.
-  function maybeUpdateRectForZooming(measure, rect) {
-    if (!window.screen || screen.logicalXDPI == null ||
-        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
-      return rect;
-    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
-    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
-    return {left: rect.left * scaleX, right: rect.right * scaleX,
-            top: rect.top * scaleY, bottom: rect.bottom * scaleY};
-  }
-
-  function clearLineMeasurementCacheFor(lineView) {
-    if (lineView.measure) {
-      lineView.measure.cache = {};
-      lineView.measure.heights = null;
-      if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
-        lineView.measure.caches[i] = {};
-    }
-  }
-
-  function clearLineMeasurementCache(cm) {
-    cm.display.externalMeasure = null;
-    removeChildren(cm.display.lineMeasure);
-    for (var i = 0; i < cm.display.view.length; i++)
-      clearLineMeasurementCacheFor(cm.display.view[i]);
-  }
-
-  function clearCaches(cm) {
-    clearLineMeasurementCache(cm);
-    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
-    if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
-    cm.display.lineNumChars = null;
-  }
-
-  function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
-  function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
-
-  // Converts a {top, bottom, left, right} box from line-local
-  // coordinates into another coordinate system. Context may be one of
-  // "line", "div" (display.lineDiv), "local"/null (editor), "window",
-  // or "page".
-  function intoCoordSystem(cm, lineObj, rect, context) {
-    if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
-      var size = widgetHeight(lineObj.widgets[i]);
-      rect.top += size; rect.bottom += size;
-    }
-    if (context == "line") return rect;
-    if (!context) context = "local";
-    var yOff = heightAtLine(lineObj);
-    if (context == "local") yOff += paddingTop(cm.display);
-    else yOff -= cm.display.viewOffset;
-    if (context == "page" || context == "window") {
-      var lOff = cm.display.lineSpace.getBoundingClientRect();
-      yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
-      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
-      rect.left += xOff; rect.right += xOff;
-    }
-    rect.top += yOff; rect.bottom += yOff;
-    return rect;
-  }
-
-  // Coverts a box from "div" coords to another coordinate system.
-  // Context may be "window", "page", "div", or "local"/null.
-  function fromCoordSystem(cm, coords, context) {
-    if (context == "div") return coords;
-    var left = coords.left, top = coords.top;
-    // First move into "page" coordinate system
-    if (context == "page") {
-      left -= pageScrollX();
-      top -= pageScrollY();
-    } else if (context == "local" || !context) {
-      var localBox = cm.display.sizer.getBoundingClientRect();
-      left += localBox.left;
-      top += localBox.top;
-    }
-
-    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
-    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
-  }
-
-  function charCoords(cm, pos, context, lineObj, bias) {
-    if (!lineObj) lineObj = getLine(cm.doc, pos.line);
-    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context);
-  }
-
-  // Returns a box for a given cursor position, which may have an
-  // 'other' property containing the position of the secondary cursor
-  // on a bidi boundary.
-  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
-    lineObj = lineObj || getLine(cm.doc, pos.line);
-    if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj);
-    function get(ch, right) {
-      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
-      if (right) m.left = m.right; else m.right = m.left;
-      return intoCoordSystem(cm, lineObj, m, context);
-    }
-    function getBidi(ch, partPos) {
-      var part = order[partPos], right = part.level % 2;
-      if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
-        part = order[--partPos];
-        ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
-        right = true;
-      } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
-        part = order[++partPos];
-        ch = bidiLeft(part) - part.level % 2;
-        right = false;
-      }
-      if (right && ch == part.to && ch > part.from) return get(ch - 1);
-      return get(ch, right);
-    }
-    var order = getOrder(lineObj), ch = pos.ch;
-    if (!order) return get(ch);
-    var partPos = getBidiPartAt(order, ch);
-    var val = getBidi(ch, partPos);
-    if (bidiOther != null) val.other = getBidi(ch, bidiOther);
-    return val;
-  }
-
-  // Used to cheaply estimate the coordinates for a position. Used for
-  // intermediate scroll updates.
-  function estimateCoords(cm, pos) {
-    var left = 0, pos = clipPos(cm.doc, pos);
-    if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch;
-    var lineObj = getLine(cm.doc, pos.line);
-    var top = heightAtLine(lineObj) + paddingTop(cm.display);
-    return {left: left, right: left, top: top, bottom: top + lineObj.height};
-  }
-
-  // Positions returned by coordsChar contain some extra information.
-  // xRel is the relative x position of the input coordinates compared
-  // to the found position (so xRel > 0 means the coordinates are to
-  // the right of the character position, for example). When outside
-  // is true, that means the coordinates lie outside the line's
-  // vertical range.
-  function PosWithInfo(line, ch, outside, xRel) {
-    var pos = Pos(line, ch);
-    pos.xRel = xRel;
-    if (outside) pos.outside = true;
-    return pos;
-  }
-
-  // Compute the character position closest to the given coordinates.
-  // Input must be lineSpace-local ("div" coordinate system).
-  function coordsChar(cm, x, y) {
-    var doc = cm.doc;
-    y += cm.display.viewOffset;
-    if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
-    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
-    if (lineN > last)
-      return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
-    if (x < 0) x = 0;
-
-    var lineObj = getLine(doc, lineN);
-    for (;;) {
-      var found = coordsCharInner(cm, lineObj, lineN, x, y);
-      var merged = collapsedSpanAtEnd(lineObj);
-      var mergedPos = merged && merged.find(0, true);
-      if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
-        lineN = lineNo(lineObj = mergedPos.to.line);
-      else
-        return found;
-    }
-  }
-
-  function coordsCharInner(cm, lineObj, lineNo, x, y) {
-    var innerOff = y - heightAtLine(lineObj);
-    var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
-    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
-
-    function getX(ch) {
-      var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasure);
-      wrongLine = true;
-      if (innerOff > sp.bottom) return sp.left - adjust;
-      else if (innerOff < sp.top) return sp.left + adjust;
-      else wrongLine = false;
-      return sp.left;
-    }
-
-    var bidi = getOrder(lineObj), dist = lineObj.text.length;
-    var from = lineLeft(lineObj), to = lineRight(lineObj);
-    var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
-
-    if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
-    // Do a binary search between these bounds.
-    for (;;) {
-      if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
-        var ch = x < fromX || x - fromX <= toX - x ? from : to;
-        var outside = ch == from ? fromOutside : toOutside
-        var xDiff = x - (ch == from ? fromX : toX);
-        // This is a kludge to handle the case where the coordinates
-        // are after a line-wrapped line. We should replace it with a
-        // more general handling of cursor positions around line
-        // breaks. (Issue #4078)
-        if (toOutside && !bidi && !/\s/.test(lineObj.text.charAt(ch)) && xDiff > 0 &&
-            ch < lineObj.text.length && preparedMeasure.view.measure.heights.length > 1) {
-          var charSize = measureCharPrepared(cm, preparedMeasure, ch, "right");
-          if (innerOff <= charSize.bottom && innerOff >= charSize.top && Math.abs(x - charSize.right) < xDiff) {
-            outside = false
-            ch++
-            xDiff = x - charSize.right
-          }
-        }
-        while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
-        var pos = PosWithInfo(lineNo, ch, outside, xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0);
-        return pos;
-      }
-      var step = Math.ceil(dist / 2), middle = from + step;
-      if (bidi) {
-        middle = from;
-        for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
-      }
-      var middleX = getX(middle);
-      if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
-      else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
-    }
-  }
-
-  var measureText;
-  // Compute the default text height.
-  function textHeight(display) {
-    if (display.cachedTextHeight != null) return display.cachedTextHeight;
-    if (measureText == null) {
-      measureText = elt("pre");
-      // Measure a bunch of lines, for browsers that compute
-      // fractional heights.
-      for (var i = 0; i < 49; ++i) {
-        measureText.appendChild(document.createTextNode("x"));
-        measureText.appendChild(elt("br"));
+        { display.input.focus() }
+    }
+  })
+  var mouseMove = function(e2) {
+    moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10
+  }
+  var dragStart = function () { return moved = true; }
+  // Let the drag handler handle this.
+  if (webkit) { display.scroller.draggable = true }
+  cm.state.draggingText = dragEnd
+  dragEnd.copy = !behavior.moveOnDrag
+  // IE's approach to draggable
+  if (display.scroller.dragDrop) { display.scroller.dragDrop() }
+  on(document, "mouseup", dragEnd)
+  on(document, "mousemove", mouseMove)
+  on(display.scroller, "dragstart", dragStart)
+  on(display.scroller, "drop", dragEnd)
+
+  delayBlurEvent(cm)
+  setTimeout(function () { return display.input.focus(); }, 20)
+}
+
+function rangeForUnit(cm, pos, unit) {
+  if (unit == "char") { return new Range(pos, pos) }
+  if (unit == "word") { return cm.findWordAt(pos) }
+  if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+  var result = unit(cm, pos)
+  return new Range(result.from, result.to)
+}
+
+// Normal selection, as opposed to text dragging.
+function leftButtonSelect(cm, event, start, behavior) {
+  var display = cm.display, doc = cm.doc
+  e_preventDefault(event)
+
+  var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
+  if (behavior.addNew && !behavior.extend) {
+    ourIndex = doc.sel.contains(start)
+    if (ourIndex > -1)
+      { ourRange = ranges[ourIndex] }
+    else
+      { ourRange = new Range(start, start) }
+  } else {
+    ourRange = doc.sel.primary()
+    ourIndex = doc.sel.primIndex
+  }
+
+  if (behavior.unit == "rectangle") {
+    if (!behavior.addNew) { ourRange = new Range(start, start) }
+    start = posFromMouse(cm, event, true, true)
+    ourIndex = -1
+  } else {
+    var range = rangeForUnit(cm, start, behavior.unit)
+    if (behavior.extend)
+      { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend) }
+    else
+      { ourRange = range }
+  }
+
+  if (!behavior.addNew) {
+    ourIndex = 0
+    setSelection(doc, new Selection([ourRange], 0), sel_mouse)
+    startSel = doc.sel
+  } else if (ourIndex == -1) {
+    ourIndex = ranges.length
+    setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
+                 {scroll: false, origin: "*mouse"})
+  } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+    setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                 {scroll: false, origin: "*mouse"})
+    startSel = doc.sel
+  } else {
+    replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)
+  }
+
+  var lastPos = start
+  function extendTo(pos) {
+    if (cmp(lastPos, pos) == 0) { return }
+    lastPos = pos
+
+    if (behavior.unit == "rectangle") {
+      var ranges = [], tabSize = cm.options.tabSize
+      var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
+      var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
+      var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
+      for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+           line <= end; line++) {
+        var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
+        if (left == right)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))) }
+        else if (text.length > leftPos)
+          { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))) }
       }
-      measureText.appendChild(document.createTextNode("x"));
-    }
-    removeChildrenAndAdd(display.measure, measureText);
-    var height = measureText.offsetHeight / 50;
-    if (height > 3) display.cachedTextHeight = height;
-    removeChildren(display.measure);
-    return height || 1;
-  }
-
-  // Compute the default character width.
-  function charWidth(display) {
-    if (display.cachedCharWidth != null) return display.cachedCharWidth;
-    var anchor = elt("span", "xxxxxxxxxx");
-    var pre = elt("pre", [anchor]);
-    removeChildrenAndAdd(display.measure, pre);
-    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
-    if (width > 2) display.cachedCharWidth = width;
-    return width || 10;
-  }
-
-  // OPERATIONS
-
-  // Operations are used to wrap a series of changes to the editor
-  // state in such a way that each change won't have to update the
-  // cursor and display (which would be awkward, slow, and
-  // error-prone). Instead, display updates are batched and then all
-  // combined and executed at once.
-
-  var operationGroup = null;
-
-  var nextOpId = 0;
-  // Start a new operation.
-  function startOperation(cm) {
-    cm.curOp = {
-      cm: cm,
-      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
-      startHeight: cm.doc.height, // Used to detect need to update scrollbar
-      forceUpdate: false,      // Used to force a redraw
-      updateInput: null,       // Whether to reset the input textarea
-      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
-      changeObjs: null,        // Accumulated changes, for firing change events
-      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
-      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
-      selectionChanged: false, // Whether the selection needs to be redrawn
-      updateMaxLine: false,    // Set when the widest line needs to be determined anew
-      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
-      scrollToPos: null,       // Used to scroll to a specific position
-      focus: false,
-      id: ++nextOpId           // Unique ID
-    };
-    if (operationGroup) {
-      operationGroup.ops.push(cm.curOp);
+      if (!ranges.length) { ranges.push(new Range(start, start)) }
+      setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                   {origin: "*mouse", scroll: false})
+      cm.scrollIntoView(pos)
     } else {
-      cm.curOp.ownsGroup = operationGroup = {
-        ops: [cm.curOp],
-        delayedCallbacks: []
-      };
-    }
-  }
-
-  function fireCallbacksForOps(group) {
-    // Calls delayed callbacks and cursorActivity handlers until no
-    // new ones appear
-    var callbacks = group.delayedCallbacks, i = 0;
-    do {
-      for (; i < callbacks.length; i++)
-        callbacks[i].call(null);
-      for (var j = 0; j < group.ops.length; j++) {
-        var op = group.ops[j];
-        if (op.cursorActivityHandlers)
-          while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
-            op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm);
+      var oldRange = ourRange
+      var range = rangeForUnit(cm, pos, behavior.unit)
+      var anchor = oldRange.anchor, head
+      if (cmp(range.anchor, anchor) > 0) {
+        head = range.head
+        anchor = minPos(oldRange.from(), range.anchor)
+      } else {
+        head = range.anchor
+        anchor = maxPos(oldRange.to(), range.head)
       }
-    } while (i < callbacks.length);
-  }
-
-  // Finish an operation, updating the display and signalling delayed events
-  function endOperation(cm) {
-    var op = cm.curOp, group = op.ownsGroup;
-    if (!group) return;
-
-    try { fireCallbacksForOps(group); }
-    finally {
-      operationGroup = null;
-      for (var i = 0; i < group.ops.length; i++)
-        group.ops[i].cm.curOp = null;
-      endOperations(group);
-    }
-  }
-
-  // The DOM updates done when an operation finishes are batched so
-  // that the minimum number of relayouts are required.
-  function endOperations(group) {
-    var ops = group.ops;
-    for (var i = 0; i < ops.length; i++) // Read DOM
-      endOperation_R1(ops[i]);
-    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
-      endOperation_W1(ops[i]);
-    for (var i = 0; i < ops.length; i++) // Read DOM
-      endOperation_R2(ops[i]);
-    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
-      endOperation_W2(ops[i]);
-    for (var i = 0; i < ops.length; i++) // Read DOM
-      endOperation_finish(ops[i]);
-  }
-
-  function endOperation_R1(op) {
-    var cm = op.cm, display = cm.display;
-    maybeClipScrollbars(cm);
-    if (op.updateMaxLine) findMaxLine(cm);
-
-    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
-      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
-                         op.scrollToPos.to.line >= display.viewTo) ||
-      display.maxLineChanged && cm.options.lineWrapping;
-    op.update = op.mustUpdate &&
-      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
-  }
-
-  function endOperation_W1(op) {
-    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
-  }
-
-  function endOperation_R2(op) {
-    var cm = op.cm, display = cm.display;
-    if (op.updatedDisplay) updateHeightsInViewport(cm);
-
-    op.barMeasure = measureForScrollbars(cm);
-
-    // If the max line changed since it was last measured, measure it,
-    // and ensure the document's width matches it.
-    // updateDisplay_W2 will use these properties to do the actual resizing
-    if (display.maxLineChanged && !cm.options.lineWrapping) {
-      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
-      cm.display.sizerWidth = op.adjustWidthTo;
-      op.barMeasure.scrollWidth =
-        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
-      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
-    }
-
-    if (op.updatedDisplay || op.selectionChanged)
-      op.preparedSelection = display.input.prepareSelection(op.focus);
-  }
-
-  function endOperation_W2(op) {
-    var cm = op.cm;
-
-    if (op.adjustWidthTo != null) {
-      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
-      if (op.maxScrollLeft < cm.doc.scrollLeft)
-        setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true);
-      cm.display.maxLineChanged = false;
-    }
-
-    var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
-    if (op.preparedSelection)
-      cm.display.input.showSelection(op.preparedSelection, takeFocus);
-    if (op.updatedDisplay || op.startHeight != cm.doc.height)
-      updateScrollbars(cm, op.barMeasure);
-    if (op.updatedDisplay)
-      setDocumentHeight(cm, op.barMeasure);
-
-    if (op.selectionChanged) restartBlink(cm);
-
-    if (cm.state.focused && op.updateInput)
-      cm.display.input.reset(op.typing);
-    if (takeFocus) ensureFocus(op.cm);
-  }
-
-  function endOperation_finish(op) {
-    var cm = op.cm, display = cm.display, doc = cm.doc;
-
-    if (op.updatedDisplay) postUpdateDisplay(cm, op.update);
-
-    // Abort mouse wheel delta measurement, when scrolling explicitly
-    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
-      display.wheelStartX = display.wheelStartY = null;
-
-    // Propagate the scroll position to the actual DOM scroller
-    if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) {
-      doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop));
-      display.scrollbars.setScrollTop(doc.scrollTop);
-      display.scroller.scrollTop = doc.scrollTop;
-    }
-    if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) {
-      doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft));
-      display.scrollbars.setScrollLeft(doc.scrollLeft);
-      display.scroller.scrollLeft = doc.scrollLeft;
-      alignHorizontally(cm);
-    }
-    // If we need to scroll a specific position into view, do so.
-    if (op.scrollToPos) {
-      var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
-                                     clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
-      if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords);
-    }
-
-    // Fire events for markers that are hidden/unidden by editing or
-    // undoing
-    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
-    if (hidden) for (var i = 0; i < hidden.length; ++i)
-      if (!hidden[i].lines.length) signal(hidden[i], "hide");
-    if (unhidden) for (var i = 0; i < unhidden.length; ++i)
-      if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
-
-    if (display.wrapper.offsetHeight)
-      doc.scrollTop = cm.display.scroller.scrollTop;
-
-    // Fire change events, and delayed event handlers
-    if (op.changeObjs)
-      signal(cm, "changes", cm, op.changeObjs);
-    if (op.update)
-      op.update.finish();
-  }
-
-  // Run the given function in an operation
-  function runInOp(cm, f) {
-    if (cm.curOp) return f();
-    startOperation(cm);
-    try { return f(); }
-    finally { endOperation(cm); }
-  }
-  // Wraps a function in an operation. Returns the wrapped function.
-  function operation(cm, f) {
-    return function() {
-      if (cm.curOp) return f.apply(cm, arguments);
-      startOperation(cm);
-      try { return f.apply(cm, arguments); }
-      finally { endOperation(cm); }
-    };
-  }
-  // Used to add methods to editor and doc instances, wrapping them in
-  // operations.
-  function methodOp(f) {
-    return function() {
-      if (this.curOp) return f.apply(this, arguments);
-      startOperation(this);
-      try { return f.apply(this, arguments); }
-      finally { endOperation(this); }
-    };
-  }
-  function docMethodOp(f) {
-    return function() {
-      var cm = this.cm;
-      if (!cm || cm.curOp) return f.apply(this, arguments);
-      startOperation(cm);
-      try { return f.apply(this, arguments); }
-      finally { endOperation(cm); }
-    };
-  }
-
-  // VIEW TRACKING
-
-  // These objects are used to represent the visible (currently drawn)
-  // part of the document. A LineView may correspond to multiple
-  // logical lines, if those are connected by collapsed ranges.
-  function LineView(doc, line, lineN) {
-    // The starting line
-    this.line = line;
-    // Continuing lines, if any
-    this.rest = visualLineContinued(line);
-    // Number of logical lines in this visual line
-    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
-    this.node = this.text = null;
-    this.hidden = lineIsHidden(doc, line);
-  }
-
-  // Create a range of LineView objects for the given lines.
-  function buildViewArray(cm, from, to) {
-    var array = [], nextPos;
-    for (var pos = from; pos < to; pos = nextPos) {
-      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
-      nextPos = pos + view.size;
-      array.push(view);
-    }
-    return array;
-  }
-
-  // Updates the display.view data structure for a given change to the
-  // document. From and to are in pre-change coordinates. Lendiff is
-  // the amount of lines added or subtracted by the change. This is
-  // used for changes that span multiple lines, or change the way
-  // lines are divided into visual lines. regLineChange (below)
-  // registers single-line changes.
-  function regChange(cm, from, to, lendiff) {
-    if (from == null) from = cm.doc.first;
-    if (to == null) to = cm.doc.first + cm.doc.size;
-    if (!lendiff) lendiff = 0;
-
-    var display = cm.display;
-    if (lendiff && to < display.viewTo &&
-        (display.updateLineNumbers == null || display.updateLineNumbers > from))
-      display.updateLineNumbers = from;
-
-    cm.curOp.viewChanged = true;
-
-    if (from >= display.viewTo) { // Change after
-      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
-        resetView(cm);
-    } else if (to <= display.viewFrom) { // Change before
-      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
-        resetView(cm);
-      } else {
-        display.viewFrom += lendiff;
-        display.viewTo += lendiff;
-      }
-    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
-      resetView(cm);
-    } else if (from <= display.viewFrom) { // Top overlap
-      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
-      if (cut) {
-        display.view = display.view.slice(cut.index);
-        display.viewFrom = cut.lineN;
-        display.viewTo += lendiff;
-      } else {
-        resetView(cm);
-      }
-    } else if (to >= display.viewTo) { // Bottom overlap
-      var cut = viewCuttingPoint(cm, from, from, -1);
-      if (cut) {
-        display.view = display.view.slice(0, cut.index);
-        display.viewTo = cut.lineN;
-      } else {
-        resetView(cm);
-      }
-    } else { // Gap in the middle
-      var cutTop = viewCuttingPoint(cm, from, from, -1);
-      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
-      if (cutTop && cutBot) {
-        display.view = display.view.slice(0, cutTop.index)
-          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
-          .concat(display.view.slice(cutBot.index));
-        display.viewTo += lendiff;
-      } else {
-        resetView(cm);
-      }
-    }
-
-    var ext = display.externalMeasured;
-    if (ext) {
-      if (to < ext.lineN)
-        ext.lineN += lendiff;
-      else if (from < ext.lineN + ext.size)
-        display.externalMeasured = null;
-    }
-  }
-
-  // Register a change to a single line. Type must be one of "text",
-  // "gutter", "class", "widget"
-  function regLineChange(cm, line, type) {
-    cm.curOp.viewChanged = true;
-    var display = cm.display, ext = cm.display.externalMeasured;
-    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
-      display.externalMeasured = null;
-
-    if (line < display.viewFrom || line >= display.viewTo) return;
-    var lineView = display.view[findViewIndex(cm, line)];
-    if (lineView.node == null) return;
-    var arr = lineView.changes || (lineView.changes = []);
-    if (indexOf(arr, type) == -1) arr.push(type);
-  }
-
-  // Clear the view.
-  function resetView(cm) {
-    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
-    cm.display.view = [];
-    cm.display.viewOffset = 0;
-  }
-
-  // Find the view element corresponding to a given line. Return null
-  // when the line isn't visible.
-  function findViewIndex(cm, n) {
-    if (n >= cm.display.viewTo) return null;
-    n -= cm.display.viewFrom;
-    if (n < 0) return null;
-    var view = cm.display.view;
-    for (var i = 0; i < view.length; i++) {
-      n -= view[i].size;
-      if (n < 0) return i;
-    }
-  }
-
-  function viewCuttingPoint(cm, oldN, newN, dir) {
-    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
-    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
-      return {index: index, lineN: newN};
-    for (var i = 0, n = cm.display.viewFrom; i < index; i++)
-      n += view[i].size;
-    if (n != oldN) {
-      if (dir > 0) {
-        if (index == view.length - 1) return null;
-        diff = (n + view[index].size) - oldN;
-        index++;
-      } else {
-        diff = n - oldN;
-      }
-      oldN += diff; newN += diff;
-    }
-    while (visualLineNo(cm.doc, newN) != newN) {
-      if (index == (dir < 0 ? 0 : view.length - 1)) return null;
-      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
-      index += dir;
-    }
-    return {index: index, lineN: newN};
-  }
-
-  // Force the view to cover a given range, adding empty view element
-  // or clipping off existing ones as needed.
-  function adjustView(cm, from, to) {
-    var display = cm.display, view = display.view;
-    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
-      display.view = buildViewArray(cm, from, to);
-      display.viewFrom = from;
+      var ranges$1 = startSel.ranges.slice(0)
+      ranges$1[ourIndex] = new Range(clipPos(doc, anchor), head)
+      setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse)
+    }
+  }
+
+  var editorSize = display.wrapper.getBoundingClientRect()
+  // Used to ensure timeout re-tries don't fire when another extend
+  // happened in the meantime (clearTimeout isn't reliable -- at
+  // least on Chrome, the timeouts still happen even when cleared,
+  // if the clear happens after their scheduled firing time).
+  var counter = 0
+
+  function extend(e) {
+    var curCount = ++counter
+    var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle")
+    if (!cur) { return }
+    if (cmp(cur, lastPos) != 0) {
+      cm.curOp.focus = activeElt()
+      extendTo(cur)
+      var visible = visibleLines(display, doc)
+      if (cur.line >= visible.to || cur.line < visible.from)
+        { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e) }}), 150) }
     } else {
-      if (display.viewFrom > from)
-        display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view);
-      else if (display.viewFrom < from)
-        display.view = display.view.slice(findViewIndex(cm, from));
-      display.viewFrom = from;
-      if (display.viewTo < to)
-        display.view = display.view.concat(buildViewArray(cm, display.viewTo, to));
-      else if (display.viewTo > to)
-        display.view = display.view.slice(0, findViewIndex(cm, to));
-    }
-    display.viewTo = to;
-  }
-
-  // Count the number of lines in the view whose DOM representation is
-  // out of date (or nonexistent).
-  function countDirtyView(cm) {
-    var view = cm.display.view, dirty = 0;
-    for (var i = 0; i < view.length; i++) {
-      var lineView = view[i];
-      if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty;
-    }
-    return dirty;
-  }
-
-  // EVENT HANDLERS
-
-  // Attach the necessary event handlers when initializing the editor
-  function registerEventHandlers(cm) {
-    var d = cm.display;
-    on(d.scroller, "mousedown", operation(cm, onMouseDown));
-    // Older IE's will not fire a second mousedown for a double click
-    if (ie && ie_version < 11)
-      on(d.scroller, "dblclick", operation(cm, function(e) {
-        if (signalDOMEvent(cm, e)) return;
-        var pos = posFromMouse(cm, e);
-        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
-        e_preventDefault(e);
-        var word = cm.findWordAt(pos);
-        extendSelection(cm.doc, word.anchor, word.head);
-      }));
-    else
-      on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
-    // Some browsers fire contextmenu *after* opening the menu, at
-    // which point we can't mess with it anymore. Context menu is
-    // handled in onMouseDown for these browsers.
-    if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
-
-    // Used to suppress mouse event handling when a touch happens
-    var touchFinished, prevTouch = {end: 0};
-    function finishTouch() {
-      if (d.activeTouch) {
-        touchFinished = setTimeout(function() {d.activeTouch = null;}, 1000);
-        prevTouch = d.activeTouch;
-        prevTouch.end = +new Date;
-      }
-    };
-    function isMouseLikeTouchEvent(e) {
-      if (e.touches.length != 1) return false;
-      var touch = e.touches[0];
-      return touch.radiusX <= 1 && touch.radiusY <= 1;
-    }
-    function farAway(touch, other) {
-      if (other.left == null) return true;
-      var dx = other.left - touch.left, dy = other.top - touch.top;
-      return dx * dx + dy * dy > 20 * 20;
-    }
-    on(d.scroller, "touchstart", function(e) {
-      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
-        clearTimeout(touchFinished);
-        var now = +new Date;
-        d.activeTouch = {start: now, moved: false,
-                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
-        if (e.touches.length == 1) {
-          d.activeTouch.left = e.touches[0].pageX;
-          d.activeTouch.top = e.touches[0].pageY;
-        }
-      }
-    });
-    on(d.scroller, "touchmove", function() {
-      if (d.activeTouch) d.activeTouch.moved = true;
-    });
-    on(d.scroller, "touchend", function(e) {
-      var touch = d.activeTouch;
-      if (touch && !eventInWidget(d, e) && touch.left != null &&
-          !touch.moved && new Date - touch.start < 300) {
-        var pos = cm.coordsChar(d.activeTouch, "page"), range;
-        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
-          range = new Range(pos, pos);
-        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
-          range = cm.findWordAt(pos);
-        else // Triple tap
-          range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0)));
-        cm.setSelection(range.anchor, range.head);
-        cm.focus();
-        e_preventDefault(e);
-      }
-      finishTouch();
-    });
-    on(d.scroller, "touchcancel", finishTouch);
-
-    // Sync scrolling between fake scrollbars and real scrollable
-    // area, ensure viewport is updated when scrolling.
-    on(d.scroller, "scroll", function() {
-      if (d.scroller.clientHeight) {
-        setScrollTop(cm, d.scroller.scrollTop);
-        setScrollLeft(cm, d.scroller.scrollLeft, true);
-        signal(cm, "scroll", cm);
-      }
-    });
-
-    // Listen to wheel events in order to try and update the viewport on time.
-    on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
-    on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
-
-    // Prevent wrapper from ever scrolling
-    on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
-
-    d.dragFunctions = {
-      enter: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);},
-      over: function(e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
-      start: function(e){onDragStart(cm, e);},
-      drop: operation(cm, onDrop),
-      leave: function(e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
-    };
-
-    var inp = d.input.getField();
-    on(inp, "keyup", function(e) { onKeyUp.call(cm, e); });
-    on(inp, "keydown", operation(cm, onKeyDown));
-    on(inp, "keypress", operation(cm, onKeyPress));
-    on(inp, "focus", bind(onFocus, cm));
-    on(inp, "blur", bind(onBlur, cm));
-  }
-
-  function dragDropChanged(cm, value, old) {
-    var wasOn = old && old != CodeMirror.Init;
-    if (!value != !wasOn) {
-      var funcs = cm.display.dragFunctions;
-      var toggle = value ? on : off;
-      toggle(cm.display.scroller, "dragstart", funcs.start);
-      toggle(cm.display.scroller, "dragenter", funcs.enter);
-      toggle(cm.display.scroller, "dragover", funcs.over);
-      toggle(cm.display.scroller, "dragleave", funcs.leave);
-      toggle(cm.display.scroller, "drop", funcs.drop);
-    }
-  }
-
-  // Called when the window resizes
-  function onResize(cm) {
-    var d = cm.display;
-    if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
-      return;
-    // Might be a text scaling operation, clear size caches.
-    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
-    d.scrollbarsClipped = false;
-    cm.setSize();
-  }
-
-  // MOUSE EVENTS
-
-  // Return true when the given mouse event happened in a widget
-  function eventInWidget(display, e) {
-    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
-      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
-          (n.parentNode == display.sizer && n != display.mover))
-        return true;
-    }
-  }
-
-  // Given a mouse event, find the corresponding position. If liberal
-  // is false, it checks whether a gutter or scrollbar was clicked,
-  // and returns null if it was. forRect is used by rectangular
-  // selections, and tries to estimate a character position even for
-  // coordinates beyond the right of the text.
-  function posFromMouse(cm, e, liberal, forRect) {
-    var display = cm.display;
-    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") return null;
-
-    var x, y, space = display.lineSpace.getBoundingClientRect();
-    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
-    try { x = e.clientX - space.left; y = e.clientY - space.top; }
-    catch (e) { return null; }
-    var coords = coordsChar(cm, x, y), line;
-    if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
-      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
-      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
-    }
-    return coords;
-  }
-
-  // A mouse down can be a single click, double click, triple click,
-  // start of selection drag, start of text drag, new cursor
-  // (ctrl-click), rectangle drag (alt-drag), or xwin
-  // middle-click-paste. Or it might be a click on something we should
-  // not interfere with, such as a scrollbar or widget.
-  function onMouseDown(e) {
-    var cm = this, display = cm.display;
-    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return;
-    display.shift = e.shiftKey;
-
-    if (eventInWidget(display, e)) {
-      if (!webkit) {
-        // Briefly turn off draggability, to allow widgets to do
-        // normal dragging things.
-        display.scroller.draggable = false;
-        setTimeout(function(){display.scroller.draggable = true;}, 100);
-      }
-      return;
-    }
-    if (clickInGutter(cm, e)) return;
-    var start = posFromMouse(cm, e);
-    window.focus();
-
-    switch (e_button(e)) {
-    case 1:
-      // #3261: make sure, that we're not starting a second selection
-      if (cm.state.selectingText)
-        cm.state.selectingText(e);
-      else if (start)
-        leftButtonDown(cm, e, start);
-      else if (e_target(e) == display.scroller)
-        e_preventDefault(e);
-      break;
-    case 2:
-      if (webkit) cm.state.lastMiddleDown = +new Date;
-      if (start) extendSelection(cm.doc, start);
-      setTimeout(function() {display.input.focus();}, 20);
-      e_preventDefault(e);
-      break;
-    case 3:
-      if (captureRightClick) onContextMenu(cm, e);
-      else delayBlurEvent(cm);
-      break;
-    }
-  }
-
-  var lastClick, lastDoubleClick;
-  function leftButtonDown(cm, e, start) {
-    if (ie) setTimeout(bind(ensureFocus, cm), 0);
-    else cm.curOp.focus = activeElt();
-
-    var now = +new Date, type;
-    if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) {
-      type = "triple";
-    } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) {
-      type = "double";
-      lastDoubleClick = {time: now, pos: start};
-    } else {
-      type = "single";
-      lastClick = {time: now, pos: start};
-    }
-
-    var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained;
-    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
-        type == "single" && (contained = sel.contains(start)) > -1 &&
-        (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) &&
-        (cmp(contained.to(), start) > 0 || start.xRel < 0))
-      leftButtonStartDrag(cm, e, start, modifier);
-    else
-      leftButtonSelect(cm, e, start, type, modifier);
-  }
-
-  // Start a text drag. When it ends, see if any dragging actually
-  // happen, and treat as a click if it didn't.
-  function leftButtonStartDrag(cm, e, start, modifier) {
-    var display = cm.display, startTime = +new Date;
-    var dragEnd = operation(cm, function(e2) {
-      if (webkit) display.scroller.draggable = false;
-      cm.state.draggingText = false;
-      off(document, "mouseup", dragEnd);
-      off(display.scroller, "drop", dragEnd);
-      if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
-        e_preventDefault(e2);
-        if (!modifier && +new Date - 200 < startTime)
-          extendSelection(cm.doc, start);
-        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
-        if (webkit || ie && ie_version == 9)
-          setTimeout(function() {document.body.focus(); display.input.focus();}, 20);
-        else
-          display.input.focus();
-      }
-    });
-    // Let the drag handler handle this.
-    if (webkit) display.scroller.draggable = true;
-    cm.state.draggingText = dragEnd;
-    dragEnd.copy = mac ? e.altKey : e.ctrlKey
-    // IE's approach to draggable
-    if (display.scroller.dragDrop) display.scroller.dragDrop();
-    on(document, "mouseup", dragEnd);
-    on(display.scroller, "drop", dragEnd);
-  }
-
-  // Normal selection, as opposed to text dragging.
-  function leftButtonSelect(cm, e, start, type, addNew) {
-    var display = cm.display, doc = cm.doc;
-    e_preventDefault(e);
-
-    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
-    if (addNew && !e.shiftKey) {
-      ourIndex = doc.sel.contains(start);
-      if (ourIndex > -1)
-        ourRange = ranges[ourIndex];
-      else
-        ourRange = new Range(start, start);
-    } else {
-      ourRange = doc.sel.primary();
-      ourIndex = doc.sel.primIndex;
-    }
-
-    if (chromeOS ? e.shiftKey && e.metaKey : e.altKey) {
-      type = "rect";
-      if (!addNew) ourRange = new Range(start, start);
-      start = posFromMouse(cm, e, true, true);
-      ourIndex = -1;
-    } else if (type == "double") {
-      var word = cm.findWordAt(start);
-      if (cm.display.shift || doc.extend)
-        ourRange = extendRange(doc, ourRange, word.anchor, word.head);
-      else
-        ourRange = word;
-    } else if (type == "triple") {
-      var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)));
-      if (cm.display.shift || doc.extend)
-        ourRange = extendRange(doc, ourRange, line.anchor, line.head);
-      else
-        ourRange = line;
-    } else {
-      ourRange = extendRange(doc, ourRange, start);
-    }
-
-    if (!addNew) {
-      ourIndex = 0;
-      setSelection(doc, new Selection([ourRange], 0), sel_mouse);
-      startSel = doc.sel;
-    } else if (ourIndex == -1) {
-      ourIndex = ranges.length;
-      setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
-                   {scroll: false, origin: "*mouse"});
-    } else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) {
-      setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
-                   {scroll: false, origin: "*mouse"});
-      startSel = doc.sel;
-    } else {
-      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
-    }
-
-    var lastPos = start;
-    function extendTo(pos) {
-      if (cmp(lastPos, pos) == 0) return;
-      lastPos = pos;
-
-      if (type == "rect") {
-        var ranges = [], tabSize = cm.options.tabSize;
-        var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
-        var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
-        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
-        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
-             line <= end; line++) {
-          var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
-          if (left == right)
-            ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)));
-          else if (text.length > leftPos)
-            ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))));
-        }
-        if (!ranges.length) ranges.push(new Range(start, start));
-        setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
-                     {origin: "*mouse", scroll: false});
-        cm.scrollIntoView(pos);
-      } else {
-        var oldRange = ourRange;
-        var anchor = oldRange.anchor, head = pos;
-        if (type != "single") {
-          if (type == "double")
-            var range = cm.findWordAt(pos);
-          else
-            var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0)));
-          if (cmp(range.anchor, anchor) > 0) {
-            head = range.head;
-            anchor = minPos(oldRange.from(), range.anchor);
-          } else {
-            head = range.anchor;
-            anchor = maxPos(oldRange.to(), range.head);
-          }
-        }
-        var ranges = startSel.ranges.slice(0);
-        ranges[ourIndex] = new Range(clipPos(doc, anchor), head);
-        setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse);
-      }
-    }
-
-    var editorSize = display.wrapper.getBoundingClientRect();
-    // Used to ensure timeout re-tries don't fire when another extend
-    // happened in the meantime (clearTimeout isn't reliable -- at
-    // least on Chrome, the timeouts still happen even when cleared,
-    // if the clear happens after their scheduled firing time).
-    var counter = 0;
-
-    function extend(e) {
-      var curCount = ++counter;
-      var cur = posFromMouse(cm, e, true, type == "rect");
-      if (!cur) return;
-      if (cmp(cur, lastPos) != 0) {
-        cm.curOp.focus = activeElt();
-        extendTo(cur);
-        var visible = visibleLines(display, doc);
-        if (cur.line >= visible.to || cur.line < visible.from)
-          setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
-      } else {
-        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
-        if (outside) setTimeout(operation(cm, function() {
-          if (counter != curCount) return;
-          display.scroller.scrollTop += outside;
-          extend(e);
-        }), 50);
-      }
-    }
-
-    function done(e) {
-      cm.state.selectingText = false;
-      counter = Infinity;
-      e_preventDefault(e);
-      display.input.focus();
-      off(document, "mousemove", move);
-      off(document, "mouseup", up);
-      doc.history.lastSelOrigin = null;
-    }
-
-    var move = operation(cm, function(e) {
-      if (!e_button(e)) done(e);
-      else extend(e);
-    });
-    var up = operation(cm, done);
-    cm.state.selectingText = up;
-    on(document, "mousemove", move);
-    on(document, "mouseup", up);
-  }
-
-  // Determines whether an event happened in the gutter, and fires the
-  // handlers for the corresponding event.
-  function gutterEvent(cm, e, type, prevent) {
-    try { var mX = e.clientX, mY = e.clientY; }
-    catch(e) { return false; }
-    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;
-    if (prevent) e_preventDefault(e);
-
-    var display = cm.display;
-    var lineBox = display.lineDiv.getBoundingClientRect();
-
-    if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);
-    mY -= lineBox.top - display.viewOffset;
-
-    for (var i = 0; i < cm.options.gutters.length; ++i) {
-      var g = display.gutters.childNodes[i];
-      if (g && g.getBoundingClientRect().right >= mX) {
-        var line = lineAtHeight(cm.doc, mY);
-        var gutter = cm.options.gutters[i];
-        signal(cm, type, cm, line, gutter, e);
-        return e_defaultPrevented(e);
-      }
-    }
-  }
-
-  function clickInGutter(cm, e) {
-    return gutterEvent(cm, e, "gutterClick", true);
-  }
-
-  // Kludge to work around strange IE behavior where it'll sometimes
-  // re-fire a series of drag-related events right after the drop (#1551)
-  var lastDrop = 0;
-
-  function onDrop(e) {
-    var cm = this;
-    clearDragCursor(cm);
-    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
-      return;
-    e_preventDefault(e);
-    if (ie) lastDrop = +new Date;
-    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
-    if (!pos || cm.isReadOnly()) return;
-    // Might be a file drop, in which case we simply extract the text
-    // and insert it.
-    if (files && files.length && window.FileReader && window.File) {
-      var n = files.length, text = Array(n), read = 0;
-      var loadFile = function(file, i) {
-        if (cm.options.allowDropFileTypes &&
-            indexOf(cm.options.allowDropFileTypes, file.type) == -1)
-          return;
-
-        var reader = new FileReader;
-        reader.onload = operation(cm, function() {
-          var content = reader.result;
-          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) content = "";
-          text[i] = content;
-          if (++read == n) {
-            pos = clipPos(cm.doc, pos);
-            var change = {from: pos, to: pos,
-                          text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
-                          origin: "paste"};
-            makeChange(cm.doc, change);
-            setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
-          }
-        });
-        reader.readAsText(file);
-      };
-      for (var i = 0; i < n; ++i) loadFile(files[i], i);
-    } else { // Normal drop
-      // Don't do a replace if the drop happened inside of the selected text.
-      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
-        cm.state.draggingText(e);
-        // Ensure the editor is re-focused
-        setTimeout(function() {cm.display.input.focus();}, 20);
-        return;
-      }
-      try {
-        var text = e.dataTransfer.getData("Text");
-        if (text) {
-          if (cm.state.draggingText && !cm.state.draggingText.copy)
-            var selected = cm.listSelections();
-          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
-          if (selected) for (var i = 0; i < selected.length; ++i)
-            replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag");
-          cm.replaceSelection(text, "around", "paste");
-          cm.display.input.focus();
-        }
-      }
-      catch(e){}
-    }
-  }
-
-  function onDragStart(cm, e) {
-    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
-    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
-
-    e.dataTransfer.setData("Text", cm.getSelection());
-    e.dataTransfer.effectAllowed = "copyMove"
-
-    // Use dummy image instead of default browsers image.
-    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
-    if (e.dataTransfer.setDragImage && !safari) {
-      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
-      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
-      if (presto) {
-        img.width = img.height = 1;
-        cm.display.wrapper.appendChild(img);
-        // Force a relayout, or Opera won't use our image for some obscure reason
-        img._top = img.offsetTop;
-      }
-      e.dataTransfer.setDragImage(img, 0, 0);
-      if (presto) img.parentNode.removeChild(img);
-    }
-  }
-
-  function onDragOver(cm, e) {
-    var pos = posFromMouse(cm, e);
-    if (!pos) return;
-    var frag = document.createDocumentFragment();
-    drawSelectionCursor(cm, pos, frag);
-    if (!cm.display.dragCursor) {
-      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
-      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
-    }
-    removeChildrenAndAdd(cm.display.dragCursor, frag);
-  }
-
-  function clearDragCursor(cm) {
-    if (cm.display.dragCursor) {
-      cm.display.lineSpace.removeChild(cm.display.dragCursor);
-      cm.display.dragCursor = null;
-    }
-  }
-
-  // SCROLL EVENTS
-
-  // Sync the scrollable area and scrollbars, ensure the viewport
-  // covers the visible area.
-  function setScrollTop(cm, val) {
-    if (Math.abs(cm.doc.scrollTop - val) < 2) return;
-    cm.doc.scrollTop = val;
-    if (!gecko) updateDisplaySimple(cm, {top: val});
-    if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
-    cm.display.scrollbars.setScrollTop(val);
-    if (gecko) updateDisplaySimple(cm);
-    startWorker(cm, 100);
-  }
-  // Sync scroller and scrollbar, ensure the gutter elements are
-  // aligned.
-  function setScrollLeft(cm, val, isScroller) {
-    if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
-    val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
-    cm.doc.scrollLeft = val;
-    alignHorizontally(cm);
-    if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
-    cm.display.scrollbars.setScrollLeft(val);
-  }
-
-  // Since the delta values reported on mouse wheel events are
-  // unstandardized between browsers and even browser versions, and
-  // generally horribly unpredictable, this code starts by measuring
-  // the scroll effect that the first few mouse wheel events have,
-  // and, from that, detects the way it can convert deltas to pixel
-  // offsets afterwards.
-  //
-  // The reason we want to know the amount a wheel event will scroll
-  // is that it gives us a chance to update the display before the
-  // actual scrolling happens, reducing flickering.
-
-  var wheelSamples = 0, wheelPixelsPerUnit = null;
-  // Fill in a browser-detected starting value on browsers where we
-  // know one. These don't have to be accurate -- the result of them
-  // being wrong would just be a slight flicker on the first wheel
-  // scroll (if it is large enough).
-  if (ie) wheelPixelsPerUnit = -.53;
-  else if (gecko) wheelPixelsPerUnit = 15;
-  else if (chrome) wheelPixelsPerUnit = -.7;
-  else if (safari) wheelPixelsPerUnit = -1/3;
-
-  var wheelEventDelta = function(e) {
-    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
-    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
-    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
-    else if (dy == null) dy = e.wheelDelta;
-    return {x: dx, y: dy};
-  };
-  CodeMirror.wheelEventPixels = function(e) {
-    var delta = wheelEventDelta(e);
-    delta.x *= wheelPixelsPerUnit;
-    delta.y *= wheelPixelsPerUnit;
-    return delta;
-  };
-
-  function onScrollWheel(cm, e) {
-    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
-
-    var display = cm.display, scroll = display.scroller;
-    // Quit if there's nothing to scroll here
-    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
-    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
-    if (!(dx && canScrollX || dy && canScrollY)) return;
-
-    // Webkit browsers on OS X abort momentum scrolls when the target
-    // of the scroll event is removed from the scrollable element.
-    // This hack (see related code in patchDisplay) makes sure the
-    // element is kept around.
-    if (dy && mac && webkit) {
-      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
-        for (var i = 0; i < view.length; i++) {
-          if (view[i].node == cur) {
-            cm.display.currentWheelTarget = cur;
-            break outer;
-          }
-        }
-      }
-    }
-
-    // On some browsers, horizontal scrolling will cause redraws to
-    // happen before the gutter has been realigned, causing it to
-    // wriggle around in a most unseemly way. When we have an
-    // estimated pixels/delta value, we just handle horizontal
-    // scrolling entirely here. It'll be slightly off from native, but
-    // better than glitching out.
-    if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
-      if (dy && canScrollY)
-        setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
-      setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
-      // Only prevent default scrolling if vertical scrolling is
-      // actually possible. Otherwise, it causes vertical scroll
-      // jitter on OSX trackpads when deltaX is small and deltaY
-      // is large (issue #3579)
-      if (!dy || (dy && canScrollY))
-        e_preventDefault(e);
-      display.wheelStartX = null; // Abort measurement, if in progress
-      return;
-    }
-
-    // 'Project' the visible viewport to cover the area that is being
-    // scrolled into view (if we know enough to estimate it).
-    if (dy && wheelPixelsPerUnit != null) {
-      var pixels = dy * wheelPixelsPerUnit;
-      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
-      if (pixels < 0) top = Math.max(0, top + pixels - 50);
-      else bot = Math.min(cm.doc.height, bot + pixels + 50);
-      updateDisplaySimple(cm, {top: top, bottom: bot});
-    }
-
-    if (wheelSamples < 20) {
-      if (display.wheelStartX == null) {
-        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
-        display.wheelDX = dx; display.wheelDY = dy;
-        setTimeout(function() {
-          if (display.wheelStartX == null) return;
-          var movedX = scroll.scrollLeft - display.wheelStartX;
-          var movedY = scroll.scrollTop - display.wheelStartY;
-          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
-            (movedX && display.wheelDX && movedX / display.wheelDX);
-          display.wheelStartX = display.wheelStartY = null;
-          if (!sample) return;
-          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
-          ++wheelSamples;
-        }, 200);
-      } else {
-        display.wheelDX += dx; display.wheelDY += dy;
+      var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
+      if (outside) { setTimeout(operation(cm, function () {
+        if (counter != curCount) { return }
+        display.scroller.scrollTop += outside
+        extend(e)
+      }), 50) }
+    }
+  }
+
+  function done(e) {
+    cm.state.selectingText = false
+    counter = Infinity
+    e_preventDefault(e)
+    display.input.focus()
+    off(document, "mousemove", move)
+    off(document, "mouseup", up)
+    doc.history.lastSelOrigin = null
+  }
+
+  var move = operation(cm, function (e) {
+    if (!e_button(e)) { done(e) }
+    else { extend(e) }
+  })
+  var up = operation(cm, done)
+  cm.state.selectingText = up
+  on(document, "mousemove", move)
+  on(document, "mouseup", up)
+}
+
+
+// Determines whether an event happened in the gutter, and fires the
+// handlers for the corresponding event.
+function gutterEvent(cm, e, type, prevent) {
+  var mX, mY
+  try { mX = e.clientX; mY = e.clientY }
+  catch(e) { return false }
+  if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+  if (prevent) { e_preventDefault(e) }
+
+  var display = cm.display
+  var lineBox = display.lineDiv.getBoundingClientRect()
+
+  if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+  mY -= lineBox.top - display.viewOffset
+
+  for (var i = 0; i < cm.options.gutters.length; ++i) {
+    var g = display.gutters.childNodes[i]
+    if (g && g.getBoundingClientRect().right >= mX) {
+      var line = lineAtHeight(cm.doc, mY)
+      var gutter = cm.options.gutters[i]
+      signal(cm, type, cm, line, gutter, e)
+      return e_defaultPrevented(e)
+    }
+  }
+}
+
+function clickInGutter(cm, e) {
+  return gutterEvent(cm, e, "gutterClick", true)
+}
+
+// CONTEXT MENU HANDLING
+
+// To make the context menu work, we need to briefly unhide the
+// textarea (making it as unobtrusive as possible) to let the
+// right-click take effect on it.
+function onContextMenu(cm, e) {
+  if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+  if (signalDOMEvent(cm, e, "contextmenu")) { return }
+  cm.display.input.onContextMenu(e)
+}
+
+function contextMenuInGutter(cm, e) {
+  if (!hasHandler(cm, "gutterContextMenu")) { return false }
+  return gutterEvent(cm, e, "gutterContextMenu", false)
+}
+
+function themeChanged(cm) {
+  cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+    cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-")
+  clearCaches(cm)
+}
+
+var Init = {toString: function(){return "CodeMirror.Init"}}
+
+var defaults = {}
+var optionHandlers = {}
+
+function defineOptions(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers
+
+  function option(name, deflt, handle, notOnInit) {
+    CodeMirror.defaults[name] = deflt
+    if (handle) { optionHandlers[name] =
+      notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old) }} : handle }
+  }
+
+  CodeMirror.defineOption = option
+
+  // Passed to option handlers when there is no old value.
+  CodeMirror.Init = Init
+
+  // These two are, on init, called from the constructor because they
+  // have to be initialized before the editor can start at all.
+  option("value", "", function (cm, val) { return cm.setValue(val); }, true)
+  option("mode", null, function (cm, val) {
+    cm.doc.modeOption = val
+    loadMode(cm)
+  }, true)
+
+  option("indentUnit", 2, loadMode, true)
+  option("indentWithTabs", false)
+  option("smartIndent", true)
+  option("tabSize", 4, function (cm) {
+    resetModeState(cm)
+    clearCaches(cm)
+    regChange(cm)
+  }, true)
+  option("lineSeparator", null, function (cm, val) {
+    cm.doc.lineSep = val
+    if (!val) { return }
+    var newBreaks = [], lineNo = cm.doc.first
+    cm.doc.iter(function (line) {
+      for (var pos = 0;;) {
+        var found = line.text.indexOf(val, pos)
+        if (found == -1) { break }
+        pos = found + val.length
+        newBreaks.push(Pos(lineNo, found))
       }
-    }
-  }
-
-  // KEY EVENTS
-
-  // Run a handler that was bound to a key.
-  function doHandleBinding(cm, bound, dropShift) {
-    if (typeof bound == "string") {
-      bound = commands[bound];
-      if (!bound) return false;
-    }
-    // Ensure previous input has been read, so that the handler sees a
-    // consistent view of the document
-    cm.display.input.ensurePolled();
-    var prevShift = cm.display.shift, done = false;
-    try {
-      if (cm.isReadOnly()) cm.state.suppressEdits = true;
-      if (dropShift) cm.display.shift = false;
-      done = bound(cm) != Pass;
-    } finally {
-      cm.display.shift = prevShift;
-      cm.state.suppressEdits = false;
-    }
-    return done;
-  }
-
-  function lookupKeyForEditor(cm, name, handle) {
-    for (var i = 0; i < cm.state.keyMaps.length; i++) {
-      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
-      if (result) return result;
-    }
-    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
-      || lookupKey(name, cm.options.keyMap, handle, cm);
-  }
-
-  var stopSeq = new Delayed;
-  function dispatchKey(cm, name, e, handle) {
-    var seq = cm.state.keySeq;
-    if (seq) {
-      if (isModifierKey(name)) return "handled";
-      stopSeq.set(50, function() {
-        if (cm.state.keySeq == seq) {
-          cm.state.keySeq = null;
-          cm.display.input.reset();
-        }
-      });
-      name = seq + " " + name;
-    }
-    var result = lookupKeyForEditor(cm, name, handle);
-
-    if (result == "multi")
-      cm.state.keySeq = name;
-    if (result == "handled")
-      signalLater(cm, "keyHandled", cm, name, e);
-
-    if (result == "handled" || result == "multi") {
-      e_preventDefault(e);
-      restartBlink(cm);
-    }
-
-    if (seq && !result && /\'$/.test(name)) {
-      e_preventDefault(e);
-      return true;
-    }
-    return !!result;
-  }
-
-  // Handle a key from the keydown event.
-  function handleKeyBinding(cm, e) {
-    var name = keyName(e, true);
-    if (!name) return false;
-
-    if (e.shiftKey && !cm.state.keySeq) {
-      // First try to resolve full name (including 'Shift-'). Failing
-      // that, see if there is a cursor-motion command (starting with
-      // 'go') bound to the keyname without 'Shift-'.
-      return dispatchKey(cm, "Shift-" + name, e, function(b) {return doHandleBinding(cm, b, true);})
-          || dispatchKey(cm, name, e, function(b) {
-               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
-                 return doHandleBinding(cm, b);
-             });
-    } else {
-      return dispatchKey(cm, name, e, function(b) { return doHandleBinding(cm, b); });
-    }
-  }
-
-  // Handle a key from the keypress event
-  function handleCharBinding(cm, e, ch) {
-    return dispatchKey(cm, "'" + ch + "'", e,
-                       function(b) { return doHandleBinding(cm, b, true); });
-  }
-
-  var lastStoppedKey = null;
-  function onKeyDown(e) {
-    var cm = this;
-    cm.curOp.focus = activeElt();
-    if (signalDOMEvent(cm, e)) return;
-    // IE does strange things with escape.
-    if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false;
-    var code = e.keyCode;
-    cm.display.shift = code == 16 || e.shiftKey;
-    var handled = handleKeyBinding(cm, e);
-    if (presto) {
-      lastStoppedKey = handled ? code : null;
-      // Opera has no cut event... we try to at least catch the key combo
-      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
-        cm.replaceSelection("", null, "cut");
-    }
-
-    // Turn mouse into crosshair when Alt is held on Mac.
-    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
-      showCrossHair(cm);
-  }
-
-  function showCrossHair(cm) {
-    var lineDiv = cm.display.lineDiv;
-    addClass(lineDiv, "CodeMirror-crosshair");
-
-    function up(e) {
-      if (e.keyCode == 18 || !e.altKey) {
-        rmClass(lineDiv, "CodeMirror-crosshair");
-        off(document, "keyup", up);
-        off(document, "mouseover", up);
-      }
-    }
-    on(document, "keyup", up);
-    on(document, "mouseover", up);
-  }
-
-  function onKeyUp(e) {
-    if (e.keyCode == 16) this.doc.sel.shift = false;
-    signalDOMEvent(this, e);
-  }
-
-  function onKeyPress(e) {
-    var cm = this;
-    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return;
-    var keyCode = e.keyCode, charCode = e.charCode;
-    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
-    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) return;
-    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
-    if (handleCharBinding(cm, e, ch)) return;
-    cm.display.input.onKeyPress(e);
-  }
-
-  // FOCUS/BLUR EVENTS
-
-  function delayBlurEvent(cm) {
-    cm.state.delayingBlurEvent = true;
-    setTimeout(function() {
-      if (cm.state.delayingBlurEvent) {
-        cm.state.delayingBlurEvent = false;
-        onBlur(cm);
-      }
-    }, 100);
-  }
-
-  function onFocus(cm) {
-    if (cm.state.delayingBlurEvent) cm.state.delayingBlurEvent = false;
-
-    if (cm.options.readOnly == "nocursor") return;
-    if (!cm.state.focused) {
-      signal(cm, "focus", cm);
-      cm.state.focused = true;
-      addClass(cm.display.wrapper, "CodeMirror-focused");
-      // This test prevents this from firing when a context
-      // menu is closed (since the input reset would kill the
-      // select-all detection hack)
-      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
-        cm.display.input.reset();
-        if (webkit) setTimeout(function() { cm.display.input.reset(true); }, 20); // Issue #1730
-      }
-      cm.display.input.receivedFocus();
-    }
-    restartBlink(cm);
-  }
-  function onBlur(cm) {
-    if (cm.state.delayingBlurEvent) return;
-
-    if (cm.state.focused) {
-      signal(cm, "blur", cm);
-      cm.state.focused = false;
-      rmClass(cm.display.wrapper, "CodeMirror-focused");
-    }
-    clearInterval(cm.display.blinker);
-    setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150);
-  }
-
-  // CONTEXT MENU HANDLING
-
-  // To make the context menu work, we need to briefly unhide the
-  // textarea (making it as unobtrusive as possible) to let the
-  // right-click take effect on it.
-  function onContextMenu(cm, e) {
-    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return;
-    if (signalDOMEvent(cm, e, "contextmenu")) return;
-    cm.display.input.onContextMenu(e);
-  }
-
-  function contextMenuInGutter(cm, e) {
-    if (!hasHandler(cm, "gutterContextMenu")) return false;
-    return gutterEvent(cm, e, "gutterContextMenu", false);
-  }
-
-  // UPDATING
-
-  // Compute the position of the end of a change (its 'to' property
-  // refers to the pre-change end).
-  var changeEnd = CodeMirror.changeEnd = function(change) {
-    if (!change.text) return change.to;
-    return Pos(change.from.line + change.text.length - 1,
-               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
-  };
-
-  // Adjust a position to refer to the post-change position of the
-  // same text, or the end of the change if the change covers it.
-  function adjustForChange(pos, change) {
-    if (cmp(pos, change.from) < 0) return pos;
-    if (cmp(pos, change.to) <= 0) return changeEnd(change);
-
-    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
-    if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch;
-    return Pos(line, ch);
-  }
-
-  function computeSelAfterChange(doc, change) {
-    var out = [];
-    for (var i = 0; i < doc.sel.ranges.length; i++) {
-      var range = doc.sel.ranges[i];
-      out.push(new Range(adjustForChange(range.anchor, change),
-                         adjustForChange(range.head, change)));
-    }
-    return normalizeSelection(out, doc.sel.primIndex);
-  }
-
-  function offsetPos(pos, old, nw) {
-    if (pos.line == old.line)
-      return Pos(nw.line, pos.ch - old.ch + nw.ch);
-    else
-      return Pos(nw.line + (pos.line - old.line), pos.ch);
-  }
-
-  // Used by replaceSelections to allow moving the selection to the
-  // start or around the replaced test. Hint may be "start" or "around".
-  function computeReplacedSel(doc, changes, hint) {
-    var out = [];
-    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
-    for (var i = 0; i < changes.length; i++) {
-      var change = changes[i];
-      var from = offsetPos(change.from, oldPrev, newPrev);
-      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
-      oldPrev = change.to;
-      newPrev = to;
-      if (hint == "around") {
-        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
-        out[i] = new Range(inv ? to : from, inv ? from : to);
-      } else {
-        out[i] = new Range(from, from);
-      }
-    }
-    return new Selection(out, doc.sel.primIndex);
-  }
-
-  // Allow "beforeChange" event handlers to influence a change
-  function filterChange(doc, change, update) {
-    var obj = {
-      canceled: false,
-      from: change.from,
-      to: change.to,
-      text: change.text,
-      origin: change.origin,
-      cancel: function() { this.canceled = true; }
-    };
-    if (update) obj.update = function(from, to, text, origin) {
-      if (from) this.from = clipPos(doc, from);
-      if (to) this.to = clipPos(doc, to);
-      if (text) this.text = text;
-      if (origin !== undefined) this.origin = origin;
-    };
-    signal(doc, "beforeChange", doc, obj);
-    if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
-
-    if (obj.canceled) return null;
-    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
-  }
-
-  // Apply a change to a document, and add it to the document's
-  // history, and propagating it to all linked documents.
-  function makeChange(doc, change, ignoreReadOnly) {
-    if (doc.cm) {
-      if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly);
-      if (doc.cm.state.suppressEdits) return;
-    }
-
-    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
-      change = filterChange(doc, change, true);
-      if (!change) return;
-    }
-
-    // Possibly split or suppress the update based on the presence
-    // of read-only spans in its range.
-    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
-    if (split) {
-      for (var i = split.length - 1; i >= 0; --i)
-        makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text});
-    } else {
-      makeChangeInner(doc, change);
-    }
-  }
-
-  function makeChangeInner(doc, change) {
-    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) return;
-    var selAfter = computeSelAfterChange(doc, change);
-    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
-
-    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
-    var rebased = [];
-
-    linkedDocs(doc, function(doc, sharedHist) {
-      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-        rebaseHist(doc.history, change);
-        rebased.push(doc.history);
-      }
-      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
-    });
-  }
-
-  // Revert a change stored in a document's history.
-  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
-    if (doc.cm && doc.cm.state.suppressEdits) return;
-
-    var hist = doc.history, event, selAfter = doc.sel;
-    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
-
-    // Verify that there is a useable event (so that ctrl-z won't
-    // needlessly clear selection events)
-    for (var i = 0; i < source.length; i++) {
-      event = source[i];
-      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
-        break;
-    }
-    if (i == source.length) return;
-    hist.lastOrigin = hist.lastSelOrigin = null;
-
-    for (;;) {
-      event = source.pop();
-      if (event.ranges) {
-        pushSelectionToHistory(event, dest);
-        if (allowSelectionOnly && !event.equals(doc.sel)) {
-          setSelection(doc, event, {clearRedo: false});
-          return;
-        }
-        selAfter = event;
-      }
-      else break;
-    }
-
-    // Build up a reverse change object to add to the opposite history
-    // stack (redo when undoing, and vice versa).
-    var antiChanges = [];
-    pushSelectionToHistory(selAfter, dest);
-    dest.push({changes: antiChanges, generation: hist.generation});
-    hist.generation = event.generation || ++hist.maxGeneration;
-
-    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
-
-    for (var i = event.changes.length - 1; i >= 0; --i) {
-      var change = event.changes[i];
-      change.origin = type;
-      if (filter && !filterChange(doc, change, false)) {
-        source.length = 0;
-        return;
+      lineNo++
+    })
+    for (var i = newBreaks.length - 1; i >= 0; i--)
+      { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }
+  })
+  option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
+    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g")
+    if (old != Init) { cm.refresh() }
+  })
+  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true)
+  option("electricChars", true)
+  option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+    throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+  }, true)
+  option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true)
+  option("rtlMoveVisually", !windows)
+  option("wholeLineUpdateBefore", true)
+
+  option("theme", "default", function (cm) {
+    themeChanged(cm)
+    guttersChanged(cm)
+  }, true)
+  option("keyMap", "default", function (cm, val, old) {
+    var next = getKeyMap(val)
+    var prev = old != Init && getKeyMap(old)
+    if (prev && prev.detach) { prev.detach(cm, next) }
+    if (next.attach) { next.attach(cm, prev || null) }
+  })
+  option("extraKeys", null)
+  option("configureMouse", null)
+
+  option("lineWrapping", false, wrappingChanged, true)
+  option("gutters", [], function (cm) {
+    setGuttersForLineNumbers(cm.options)
+    guttersChanged(cm)
+  }, true)
+  option("fixedGutter", true, function (cm, val) {
+    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"
+    cm.refresh()
+  }, true)
+  option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true)
+  option("scrollbarStyle", "native", function (cm) {
+    initScrollbars(cm)
+    updateScrollbars(cm)
+    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop)
+    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft)
+  }, true)
+  option("lineNumbers", false, function (cm) {
+    setGuttersForLineNumbers(cm.options)
+    guttersChanged(cm)
+  }, true)
+  option("firstLineNumber", 1, guttersChanged, true)
+  option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true)
+  option("showCursorWhenSelecting", false, updateSelection, true)
+
+  option("resetSelectionOnContextMenu", true)
+  option("lineWiseCopyCut", true)
+  option("pasteLinesPerSelection", true)
+
+  option("readOnly", false, function (cm, val) {
+    if (val == "nocursor") {
+      onBlur(cm)
+      cm.display.input.blur()
+    }
+    cm.display.input.readOnlyChanged(val)
+  })
+  option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset() }}, true)
+  option("dragDrop", true, dragDropChanged)
+  option("allowDropFileTypes", null)
+
+  option("cursorBlinkRate", 530)
+  option("cursorScrollMargin", 0)
+  option("cursorHeight", 1, updateSelection, true)
+  option("singleCursorHeightPerLine", true, updateSelection, true)
+  option("workTime", 100)
+  option("workDelay", 100)
+  option("flattenSpans", true, resetModeState, true)
+  option("addModeClass", false, resetModeState, true)
+  option("pollInterval", 100)
+  option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; })
+  option("historyEventDelay", 1250)
+  option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true)
+  option("maxHighlightLength", 10000, resetModeState, true)
+  option("moveInputWithCursor", true, function (cm, val) {
+    if (!val) { cm.display.input.resetPosition() }
+  })
+
+  option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; })
+  option("autofocus", null)
+  option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true)
+}
+
+function guttersChanged(cm) {
+  updateGutters(cm)
+  regChange(cm)
+  alignHorizontally(cm)
+}
+
+function dragDropChanged(cm, value, old) {
+  var wasOn = old && old != Init
+  if (!value != !wasOn) {
+    var funcs = cm.display.dragFunctions
+    var toggle = value ? on : off
+    toggle(cm.display.scroller, "dragstart", funcs.start)
+    toggle(cm.display.scroller, "dragenter", funcs.enter)
+    toggle(cm.display.scroller, "dragover", funcs.over)
+    toggle(cm.display.scroller, "dragleave", funcs.leave)
+    toggle(cm.display.scroller, "drop", funcs.drop)
+  }
+}
+
+function wrappingChanged(cm) {
+  if (cm.options.lineWrapping) {
+    addClass(cm.display.wrapper, "CodeMirror-wrap")
+    cm.display.sizer.style.minWidth = ""
+    cm.display.sizerWidth = null
+  } else {
+    rmClass(cm.display.wrapper, "CodeMirror-wrap")
+    findMaxLine(cm)
+  }
+  estimateLineHeights(cm)
+  regChange(cm)
+  clearCaches(cm)
+  setTimeout(function () { return updateScrollbars(cm); }, 100)
+}
+
+// A CodeMirror instance represents an editor. This is the object
+// that user code is usually dealing with.
+
+function CodeMirror(place, options) {
+  var this$1 = this;
+
+  if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
+
+  this.options = options = options ? copyObj(options) : {}
+  // Determine effective options based on given values and defaults.
+  copyObj(defaults, options, false)
+  setGuttersForLineNumbers(options)
+
+  var doc = options.value
+  if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction) }
+  this.doc = doc
+
+  var input = new CodeMirror.inputStyles[options.inputStyle](this)
+  var display = this.display = new Display(place, doc, input)
+  display.wrapper.CodeMirror = this
+  updateGutters(this)
+  themeChanged(this)
+  if (options.lineWrapping)
+    { this.display.wrapper.className += " CodeMirror-wrap" }
+  initScrollbars(this)
+
+  this.state = {
+    keyMaps: [],  // stores maps added by addKeyMap
+    overlays: [], // highlighting overlays, as added by addOverlay
+    modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+    overwrite: false,
+    delayingBlurEvent: false,
+    focused: false,
+    suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+    pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+    selectingText: false,
+    draggingText: false,
+    highlight: new Delayed(), // stores highlight worker timeout
+    keySeq: null,  // Unfinished key sequence
+    specialChars: null
+  }
+
+  if (options.autofocus && !mobile) { display.input.focus() }
+
+  // Override magic textarea content restore that IE sometimes does
+  // on our hidden textarea on reload
+  if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20) }
+
+  registerEventHandlers(this)
+  ensureGlobalHandlers()
+
+  startOperation(this)
+  this.curOp.forceUpdate = true
+  attachDoc(this, doc)
+
+  if ((options.autofocus && !mobile) || this.hasFocus())
+    { setTimeout(bind(onFocus, this), 20) }
+  else
+    { onBlur(this) }
+
+  for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+    { optionHandlers[opt](this$1, options[opt], Init) } }
+  maybeUpdateLineNumberWidth(this)
+  if (options.finishInit) { options.finishInit(this) }
+  for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1) }
+  endOperation(this)
+  // Suppress optimizelegibility in Webkit, since it breaks text
+  // measuring on line wrapping boundaries.
+  if (webkit && options.lineWrapping &&
+      getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+    { display.lineDiv.style.textRendering = "auto" }
+}
+
+// The default configuration options.
+CodeMirror.defaults = defaults
+// Functions to run when options are changed.
+CodeMirror.optionHandlers = optionHandlers
+
+// Attach the necessary event handlers when initializing the editor
+function registerEventHandlers(cm) {
+  var d = cm.display
+  on(d.scroller, "mousedown", operation(cm, onMouseDown))
+  // Older IE's will not fire a second mousedown for a double click
+  if (ie && ie_version < 11)
+    { on(d.scroller, "dblclick", operation(cm, function (e) {
+      if (signalDOMEvent(cm, e)) { return }
+      var pos = posFromMouse(cm, e)
+      if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+      e_preventDefault(e)
+      var word = cm.findWordAt(pos)
+      extendSelection(cm.doc, word.anchor, word.head)
+    })) }
+  else
+    { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }) }
+  // Some browsers fire contextmenu *after* opening the menu, at
+  // which point we can't mess with it anymore. Context menu is
+  // handled in onMouseDown for these browsers.
+  if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }) }
+
+  // Used to suppress mouse event handling when a touch happens
+  var touchFinished, prevTouch = {end: 0}
+  function finishTouch() {
+    if (d.activeTouch) {
+      touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000)
+      prevTouch = d.activeTouch
+      prevTouch.end = +new Date
+    }
+  }
+  function isMouseLikeTouchEvent(e) {
+    if (e.touches.length != 1) { return false }
+    var touch = e.touches[0]
+    return touch.radiusX <= 1 && touch.radiusY <= 1
+  }
+  function farAway(touch, other) {
+    if (other.left == null) { return true }
+    var dx = other.left - touch.left, dy = other.top - touch.top
+    return dx * dx + dy * dy > 20 * 20
+  }
+  on(d.scroller, "touchstart", function (e) {
+    if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
+      d.input.ensurePolled()
+      clearTimeout(touchFinished)
+      var now = +new Date
+      d.activeTouch = {start: now, moved: false,
+                       prev: now - prevTouch.end <= 300 ? prevTouch : null}
+      if (e.touches.length == 1) {
+        d.activeTouch.left = e.touches[0].pageX
+        d.activeTouch.top = e.touches[0].pageY
       }
-
-      antiChanges.push(historyChangeFromChange(doc, change));
-
-      var after = i ? computeSelAfterChange(doc, change) : lst(source);
-      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
-      if (!i && doc.cm) doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)});
-      var rebased = [];
-
-      // Propagate to the linked documents
-      linkedDocs(doc, function(doc, sharedHist) {
-        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
-          rebaseHist(doc.history, change);
-          rebased.push(doc.history);
-        }
-        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
-      });
-    }
-  }
-
-  // Sub-views need their line numbers shifted when text is added
-  // above or below them in the parent document.
-  function shiftDoc(doc, distance) {
-    if (distance == 0) return;
-    doc.first += distance;
-    doc.sel = new Selection(map(doc.sel.ranges, function(range) {
-      return new Range(Pos(range.anchor.line + distance, range.anchor.ch),
-                       Pos(range.head.line + distance, range.head.ch));
-    }), doc.sel.primIndex);
-    if (doc.cm) {
-      regChange(doc.cm, doc.first, doc.first - distance, distance);
-      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
-        regLineChange(doc.cm, l, "gutter");
-    }
-  }
-
-  // More lower-level change function, handling only a single document
-  // (not linked ones).
-  function makeChangeSingleDoc(doc, change, selAfter, spans) {
-    if (doc.cm && !doc.cm.curOp)
-      return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
-
-    if (change.to.line < doc.first) {
-      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
-      return;
-    }
-    if (change.from.line > doc.lastLine()) return;
-
-    // Clip the change to the size of this doc
-    if (change.from.line < doc.first) {
-      var shift = change.text.length - 1 - (doc.first - change.from.line);
-      shiftDoc(doc, shift);
-      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
-                text: [lst(change.text)], origin: change.origin};
-    }
-    var last = doc.lastLine();
-    if (change.to.line > last) {
-      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
-                text: [change.text[0]], origin: change.origin};
-    }
-
-    change.removed = getBetween(doc, change.from, change.to);
-
-    if (!selAfter) selAfter = computeSelAfterChange(doc, change);
-    if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
-    else updateDoc(doc, change, spans);
-    setSelectionNoUndo(doc, selAfter, sel_dontScroll);
-  }
-
-  // Handle the interaction of a change to a document with the editor
-  // that this document is part of.
-  function makeChangeSingleDocInEditor(cm, change, spans) {
-    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
-
-    var recomputeMaxLength = false, checkWidthStart = from.line;
-    if (!cm.options.lineWrapping) {
-      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
-      doc.iter(checkWidthStart, to.line + 1, function(line) {
-        if (line == display.maxLine) {
-          recomputeMaxLength = true;
-          return true;
-        }
-      });
-    }
-
-    if (doc.sel.contains(change.from, change.to) > -1)
-      signalCursorActivity(cm);
-
-    updateDoc(doc, change, spans, estimateHeight(cm));
-
-    if (!cm.options.lineWrapping) {
-      doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
-        var len = lineLength(line);
-        if (len > display.maxLineLength) {
-          display.maxLine = line;
-          display.maxLineLength = len;
-          display.maxLineChanged = true;
-          recomputeMaxLength = false;
-        }
-      });
-      if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
-    }
-
-    // Adjust frontier, schedule worker
-    doc.frontier = Math.min(doc.frontier, from.line);
-    startWorker(cm, 400);
-
-    var lendiff = change.text.length - (to.line - from.line) - 1;
-    // Remember that these lines changed, for updating the display
-    if (change.full)
-      regChange(cm);
-    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
-      regLineChange(cm, from.line, "text");
-    else
-      regChange(cm, from.line, to.line + 1, lendiff);
-
-    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
-    if (changeHandler || changesHandler) {
-      var obj = {
-        from: from, to: to,
-        text: change.text,
-        removed: change.removed,
-        origin: change.origin
-      };
-      if (changeHandler) signalLater(cm, "change", cm, obj);
-      if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj);
-    }
-    cm.display.selForContextMenu = null;
-  }
-
-  function replaceRange(doc, code, from, to, origin) {
-    if (!to) to = from;
-    if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
-    if (typeof code == "string") code = doc.splitLines(code);
-    makeChange(doc, {from: from, to: to, text: code, origin: origin});
-  }
-
-  // SCROLLING THINGS INTO VIEW
-
-  // If an editor sits on the top or bottom of the window, partially
-  // scrolled out of view, this ensures that the cursor is visible.
-  function maybeScrollWindow(cm, coords) {
-    if (signalDOMEvent(cm, "scrollCursorIntoView")) return;
-
-    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
-    if (coords.top + box.top < 0) doScroll = true;
-    else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
-    if (doScroll != null && !phantom) {
-      var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
-                           (coords.top - display.viewOffset - paddingTop(cm.display)) + "px; height: " +
-                           (coords.bottom - coords.top + scrollGap(cm) + display.barHeight) + "px; left: " +
-                           coords.left + "px; width: 2px;");
-      cm.display.lineSpace.appendChild(scrollNode);
-      scrollNode.scrollIntoView(doScroll);
-      cm.display.lineSpace.removeChild(scrollNode);
-    }
-  }
-
-  // Scroll a given position into view (immediately), verifying that
-  // it actually became visible (as line heights are accurately
-  // measured, the position of something may 'drift' during drawing).
-  function scrollPosIntoView(cm, pos, end, margin) {
-    if (margin == null) margin = 0;
-    for (var limit = 0; limit < 5; limit++) {
-      var changed = false, coords = cursorCoords(cm, pos);
-      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
-      var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
-                                         Math.min(coords.top, endCoords.top) - margin,
-                                         Math.max(coords.left, endCoords.left),
-                                         Math.max(coords.bottom, endCoords.bottom) + margin);
-      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
-      if (scrollPos.scrollTop != null) {
-        setScrollTop(cm, scrollPos.scrollTop);
-        if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
-      }
-      if (scrollPos.scrollLeft != null) {
-        setScrollLeft(cm, scrollPos.scrollLeft);
-        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
+    }
+  })
+  on(d.scroller, "touchmove", function () {
+    if (d.activeTouch) { d.activeTouch.moved = true }
+  })
+  on(d.scroller, "touchend", function (e) {
+    var touch = d.activeTouch
+    if (touch && !eventInWidget(d, e) && touch.left != null &&
+        !touch.moved && new Date - touch.start < 300) {
+      var pos = cm.coordsChar(d.activeTouch, "page"), range
+      if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+        { range = new Range(pos, pos) }
+      else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+        { range = cm.findWordAt(pos) }
+      else // Triple tap
+        { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+      cm.setSelection(range.anchor, range.head)
+      cm.focus()
+      e_preventDefault(e)
+    }
+    finishTouch()
+  })
+  on(d.scroller, "touchcancel", finishTouch)
+
+  // Sync scrolling between fake scrollbars and real scrollable
+  // area, ensure viewport is updated when scrolling.
+  on(d.scroller, "scroll", function () {
+    if (d.scroller.clientHeight) {
+      updateScrollTop(cm, d.scroller.scrollTop)
+      setScrollLeft(cm, d.scroller.scrollLeft, true)
+      signal(cm, "scroll", cm)
+    }
+  })
+
+  // Listen to wheel events in order to try and update the viewport on time.
+  on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); })
+  on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); })
+
+  // Prevent wrapper from ever scrolling
+  on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; })
+
+  d.dragFunctions = {
+    enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e) }},
+    over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
+    start: function (e) { return onDragStart(cm, e); },
+    drop: operation(cm, onDrop),
+    leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}
+  }
+
+  var inp = d.input.getField()
+  on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); })
+  on(inp, "keydown", operation(cm, onKeyDown))
+  on(inp, "keypress", operation(cm, onKeyPress))
+  on(inp, "focus", function (e) { return onFocus(cm, e); })
+  on(inp, "blur", function (e) { return onBlur(cm, e); })
+}
+
+var initHooks = []
+CodeMirror.defineInitHook = function (f) { return initHooks.push(f); }
+
+// Indent the given line. The how parameter can be "smart",
+// "add"/null, "subtract", or "prev". When aggressive is false
+// (typically set to true for forced single-line indents), empty
+// lines are not indented, and places where the mode returns Pass
+// are left alone.
+function indentLine(cm, n, how, aggressive) {
+  var doc = cm.doc, state
+  if (how == null) { how = "add" }
+  if (how == "smart") {
+    // Fall back to "prev" when the mode doesn't have an indentation
+    // method.
+    if (!doc.mode.indent) { how = "prev" }
+    else { state = getContextBefore(cm, n).state }
+  }
+
+  var tabSize = cm.options.tabSize
+  var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
+  if (line.stateAfter) { line.stateAfter = null }
+  var curSpaceString = line.text.match(/^\s*/)[0], indentation
+  if (!aggressive && !/\S/.test(line.text)) {
+    indentation = 0
+    how = "not"
+  } else if (how == "smart") {
+    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
+    if (indentation == Pass || indentation > 150) {
+      if (!aggressive) { return }
+      how = "prev"
+    }
+  }
+  if (how == "prev") {
+    if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize) }
+    else { indentation = 0 }
+  } else if (how == "add") {
+    indentation = curSpace + cm.options.indentUnit
+  } else if (how == "subtract") {
+    indentation = curSpace - cm.options.indentUnit
+  } else if (typeof how == "number") {
+    indentation = curSpace + how
+  }
+  indentation = Math.max(0, indentation)
+
+  var indentString = "", pos = 0
+  if (cm.options.indentWithTabs)
+    { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"} }
+  if (pos < indentation) { indentString += spaceStr(indentation - pos) }
+
+  if (indentString != curSpaceString) {
+    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
+    line.stateAfter = null
+    return true
+  } else {
+    // Ensure that, if the cursor was in the whitespace at the start
+    // of the line, it is moved to the end of that space.
+    for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+      var range = doc.sel.ranges[i$1]
+      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+        var pos$1 = Pos(n, curSpaceString.length)
+        replaceOneSelection(doc, i$1, new Range(pos$1, pos$1))
+        break
       }
-      if (!changed) break;
-    }
-    return coords;
-  }
-
-  // Scroll a given set of coordinates into view (immediately).
-  function scrollIntoView(cm, x1, y1, x2, y2) {
-    var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
-    if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
-    if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
-  }
-
-  // Calculate a new scroll position needed to scroll the given
-  // rectangle into view. Returns an object with scrollTop and
-  // scrollLeft properties. When these are undefined, the
-  // vertical/horizontal position does not need to be adjusted.
-  function calculateScrollPos(cm, x1, y1, x2, y2) {
-    var display = cm.display, snapMargin = textHeight(cm.display);
-    if (y1 < 0) y1 = 0;
-    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
-    var screen = displayHeight(cm), result = {};
-    if (y2 - y1 > screen) y2 = y1 + screen;
-    var docBottom = cm.doc.height + paddingVert(display);
-    var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
-    if (y1 < screentop) {
-      result.scrollTop = atTop ? 0 : y1;
-    } else if (y2 > screentop + screen) {
-      var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
-      if (newTop != screentop) result.scrollTop = newTop;
-    }
-
-    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
-    var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
-    var tooWide = x2 - x1 > screenw;
-    if (tooWide) x2 = x1 + screenw;
-    if (x1 < 10)
-      result.scrollLeft = 0;
-    else if (x1 < screenleft)
-      result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10));
-    else if (x2 > screenw + screenleft - 3)
-      result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw;
-    return result;
-  }
-
-  // Store a relative adjustment to the scroll position in the current
-  // operation (to be applied when the operation finishes).
-  function addToScrollPos(cm, left, top) {
-    if (left != null || top != null) resolveScrollToPos(cm);
-    if (left != null)
-      cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left;
-    if (top != null)
-      cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
-  }
-
-  // Make sure that at the end of the operation the current cursor is
-  // shown.
-  function ensureCursorVisible(cm) {
-    resolveScrollToPos(cm);
-    var cur = cm.getCursor(), from = cur, to = cur;
-    if (!cm.options.lineWrapping) {
-      from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur;
-      to = Pos(cur.line, cur.ch + 1);
-    }
-    cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true};
-  }
-
-  // When an operation has its scrollToPos property set, and another
-  // scroll action is applied before the end of the operation, this
-  // 'simulates' scrolling that position into view in a cheap way, so
-  // that the effect of intermediate scroll commands is not ignored.
-  function resolveScrollToPos(cm) {
-    var range = cm.curOp.scrollToPos;
-    if (range) {
-      cm.curOp.scrollToPos = null;
-      var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
-      var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
-                                    Math.min(from.top, to.top) - range.margin,
-                                    Math.max(from.right, to.right),
-                                    Math.max(from.bottom, to.bottom) + range.margin);
-      cm.scrollTo(sPos.scrollLeft, sPos.scrollTop);
-    }
-  }
-
-  // API UTILITIES
-
-  // Indent the given line. The how parameter can be "smart",
-  // "add"/null, "subtract", or "prev". When aggressive is false
-  // (typically set to true for forced single-line indents), empty
-  // lines are not indented, and places where the mode returns Pass
-  // are left alone.
-  function indentLine(cm, n, how, aggressive) {
-    var doc = cm.doc, state;
-    if (how == null) how = "add";
-    if (how == "smart") {
-      // Fall back to "prev" when the mode doesn't have an indentation
-      // method.
-      if (!doc.mode.indent) how = "prev";
-      else state = getStateBefore(cm, n);
-    }
-
-    var tabSize = cm.options.tabSize;
-    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
-    if (line.stateAfter) line.stateAfter = null;
-    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
-    if (!aggressive && !/\S/.test(line.text)) {
-      indentation = 0;
-      how = "not";
-    } else if (how == "smart") {
-      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
-      if (indentation == Pass || indentation > 150) {
-        if (!aggressive) return;
-        how = "prev";
+    }
+  }
+}
+
+// This will be set to a {lineWise: bool, text: [string]} object, so
+// that, when pasting, we know what kind of selections the copied
+// text was made out of.
+var lastCopied = null
+
+function setLastCopied(newLastCopied) {
+  lastCopied = newLastCopied
+}
+
+function applyTextInput(cm, inserted, deleted, sel, origin) {
+  var doc = cm.doc
+  cm.display.shift = false
+  if (!sel) { sel = doc.sel }
+
+  var paste = cm.state.pasteIncoming || origin == "paste"
+  var textLines = splitLinesAuto(inserted), multiPaste = null
+  // When pasing N lines into N selections, insert one line per selection
+  if (paste && sel.ranges.length > 1) {
+    if (lastCopied && lastCopied.text.join("\n") == inserted) {
+      if (sel.ranges.length % lastCopied.text.length == 0) {
+        multiPaste = []
+        for (var i = 0; i < lastCopied.text.length; i++)
+          { multiPaste.push(doc.splitLines(lastCopied.text[i])) }
       }
-    }
-    if (how == "prev") {
-      if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
-      else indentation = 0;
-    } else if (how == "add") {
-      indentation = curSpace + cm.options.indentUnit;
-    } else if (how == "subtract") {
-      indentation = curSpace - cm.options.indentUnit;
-    } else if (typeof how == "number") {
-      indentation = curSpace + how;
-    }
-    indentation = Math.max(0, indentation);
-
-    var indentString = "", pos = 0;
-    if (cm.options.indentWithTabs)
-      for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
-    if (pos < indentation) indentString += spaceStr(indentation - pos);
-
-    if (indentString != curSpaceString) {
-      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
-      line.stateAfter = null;
-      return true;
-    } else {
-      // Ensure that, if the cursor was in the whitespace at the start
-      // of the line, it is moved to the end of that space.
-      for (var i = 0; i < doc.sel.ranges.length; i++) {
-        var range = doc.sel.ranges[i];
-        if (range.head.line == n && range.head.ch < curSpaceString.length) {
-          var pos = Pos(n, curSpaceString.length);
-          replaceOneSelection(doc, i, new Range(pos, pos));
-          break;
-        }
-      }
-    }
-  }
-
-  // Utility for applying a change to a line by handle or number,
-  // returning the number and optionally registering the line as
-  // changed.
-  function changeLine(doc, handle, changeType, op) {
-    var no = handle, line = handle;
-    if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
-    else no = lineNo(handle);
-    if (no == null) return null;
-    if (op(line, no) && doc.cm) regLineChange(doc.cm, no, changeType);
-    return line;
-  }
-
-  // Helper for deleting text near the selection(s), used to implement
-  // backspace, delete, and similar functionality.
-  function deleteNearSelection(cm, compute) {
-    var ranges = cm.doc.sel.ranges, kill = [];
-    // Build up a set of ranges to kill first, merging overlapping
-    // ranges.
-    for (var i = 0; i < ranges.length; i++) {
-      var toKill = compute(ranges[i]);
-      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
-        var replaced = kill.pop();
-        if (cmp(replaced.from, toKill.from) < 0) {
-          toKill.from = replaced.from;
-          break;
-        }
-      }
-      kill.push(toKill);
-    }
-    // Next, remove those actual ranges.
-    runInOp(cm, function() {
-      for (var i = kill.length - 1; i >= 0; i--)
-        replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete");
-      ensureCursorVisible(cm);
-    });
-  }
-
-  // Used for horizontal relative motion. Dir is -1 or 1 (left or
-  // right), unit can be "char", "column" (like char, but doesn't
-  // cross line boundaries), "word" (across next word), or "group" (to
-  // the start of next group of word or non-word-non-whitespace
-  // chars). The visually param controls whether, in right-to-left
-  // text, direction 1 means to move towards the next index in the
-  // string, or towards the character to the right of the current
-  // position. The resulting position will have a hitSide=true
-  // property if it reached the end of the document.
-  function findPosH(doc, pos, dir, unit, visually) {
-    var line = pos.line, ch = pos.ch, origDir = dir;
-    var lineObj = getLine(doc, line);
-    function findNextLine() {
-      var l = line + dir;
-      if (l < doc.first || l >= doc.first + doc.size) return false
-      line = l;
-      return lineObj = getLine(doc, l);
-    }
-    function moveOnce(boundToLine) {
-      var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
-      if (next == null) {
-        if (!boundToLine && findNextLine()) {
-          if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
-          else ch = dir < 0 ? lineObj.text.length : 0;
-        } else return false
-      } else ch = next;
-      return true;
-    }
-
-    if (unit == "char") {
-      moveOnce()
-    } else if (unit == "column") {
-      moveOnce(true)
-    } else if (unit == "word" || unit == "group") {
-      var sawType = null, group = unit == "group";
-      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
-      for (var first = true;; first = false) {
-        if (dir < 0 && !moveOnce(!first)) break;
-        var cur = lineObj.text.charAt(ch) || "\n";
-        var type = isWordChar(cur, helper) ? "w"
-          : group && cur == "\n" ? "n"
-          : !group || /\s/.test(cur) ? null
-          : "p";
-        if (group && !first && !type) type = "s";
-        if (sawType && sawType != type) {
-          if (dir < 0) {dir = 1; moveOnce();}
-          break;
-        }
-
-        if (type) sawType = type;
-        if (dir > 0 && !moveOnce(!first)) break;
-      }
-    }
-    var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true);
-    if (!cmp(pos, result)) result.hitSide = true;
-    return result;
-  }
-
-  // For relative vertical movement. Dir may be -1 or 1. Unit can be
-  // "page" or "line". The resulting position will have a hitSide=true
-  // property if it reached the end of the document.
-  function findPosV(cm, pos, dir, unit) {
-    var doc = cm.doc, x = pos.left, y;
-    if (unit == "page") {
-      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
-      y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
-    } else if (unit == "line") {
-      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
-    }
-    for (;;) {
-      var target = coordsChar(cm, x, y);
-      if (!target.outside) break;
-      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
-      y += dir * 5;
-    }
-    return target;
-  }
-
-  // EDITOR METHODS
-
-  // The publicly visible API. Note that methodOp(f) means
-  // 'wrap f in an operation, performed on its `this` parameter'.
-
-  // This is not the complete set of editor methods. Most of the
-  // methods defined on the Doc type are also injected into
-  // CodeMirror.prototype, for backwards compatibility and
-  // convenience.
+    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+      multiPaste = map(textLines, function (l) { return [l]; })
+    }
+  }
+
+  var updateInput
+  // Normal behavior is to insert the new text into every selection
+  for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+    var range = sel.ranges[i$1]
+    var from = range.from(), to = range.to()
+    if (range.empty()) {
+      if (deleted && deleted > 0) // Handle deletion
+        { from = Pos(from.line, from.ch - deleted) }
+      else if (cm.state.overwrite && !paste) // Handle overwrite
+        { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)) }
+      else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+        { from = to = Pos(from.line, 0) }
+    }
+    updateInput = cm.curOp.updateInput
+    var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+                       origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}
+    makeChange(cm.doc, changeEvent)
+    signalLater(cm, "inputRead", cm, changeEvent)
+  }
+  if (inserted && !paste)
+    { triggerElectric(cm, inserted) }
+
+  ensureCursorVisible(cm)
+  cm.curOp.updateInput = updateInput
+  cm.curOp.typing = true
+  cm.state.pasteIncoming = cm.state.cutIncoming = false
+}
+
+function handlePaste(e, cm) {
+  var pasted = e.clipboardData && e.clipboardData.getData("Text")
+  if (pasted) {
+    e.preventDefault()
+    if (!cm.isReadOnly() && !cm.options.disableInput)
+      { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }) }
+    return true
+  }
+}
+
+function triggerElectric(cm, inserted) {
+  // When an 'electric' character is inserted, immediately trigger a reindent
+  if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+  var sel = cm.doc.sel
+
+  for (var i = sel.ranges.length - 1; i >= 0; i--) {
+    var range = sel.ranges[i]
+    if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
+    var mode = cm.getModeAt(range.head)
+    var indented = false
+    if (mode.electricChars) {
+      for (var j = 0; j < mode.electricChars.length; j++)
+        { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+          indented = indentLine(cm, range.head.line, "smart")
+          break
+        } }
+    } else if (mode.electricInput) {
+      if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+        { indented = indentLine(cm, range.head.line, "smart") }
+    }
+    if (indented) { signalLater(cm, "electricInput", cm, range.head.line) }
+  }
+}
+
+function copyableRanges(cm) {
+  var text = [], ranges = []
+  for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+    var line = cm.doc.sel.ranges[i].head.line
+    var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
+    ranges.push(lineRange)
+    text.push(cm.getRange(lineRange.anchor, lineRange.head))
+  }
+  return {text: text, ranges: ranges}
+}
+
+function disableBrowserMagic(field, spellcheck) {
+  field.setAttribute("autocorrect", "off")
+  field.setAttribute("autocapitalize", "off")
+  field.setAttribute("spellcheck", !!spellcheck)
+}
+
+function hiddenTextarea() {
+  var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none")
+  var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
+  // The textarea is kept positioned near the cursor to prevent the
+  // fact that it'll be scrolled into view on input from scrolling
+  // our fake cursor out of view. On webkit, when wrap=off, paste is
+  // very slow. So make the area wide instead.
+  if (webkit) { te.style.width = "1000px" }
+  else { te.setAttribute("wrap", "off") }
+  // If border: 0; -- iOS fails to open keyboard (issue #1287)
+  if (ios) { te.style.border = "1px solid black" }
+  disableBrowserMagic(te)
+  return div
+}
+
+// The publicly visible API. Note that methodOp(f) means
+// 'wrap f in an operation, performed on its `this` parameter'.
+
+// This is not the complete set of editor methods. Most of the
+// methods defined on the Doc type are also injected into
+// CodeMirror.prototype, for backwards compatibility and
+// convenience.
+
+function addEditorMethods(CodeMirror) {
+  var optionHandlers = CodeMirror.optionHandlers
+
+  var helpers = CodeMirror.helpers = {}
 
   CodeMirror.prototype = {
     constructor: CodeMirror,
-    focus: function(){window.focus(); this.display.input.focus();},
+    focus: function(){window.focus(); this.display.input.focus()},
 
     setOption: function(option, value) {
-      var options = this.options, old = options[option];
-      if (options[option] == value && option != "mode") return;
-      options[option] = value;
+      var options = this.options, old = options[option]
+      if (options[option] == value && option != "mode") { return }
+      options[option] = value
       if (optionHandlers.hasOwnProperty(option))
-        operation(this, optionHandlers[option])(this, value, old);
+        { operation(this, optionHandlers[option])(this, value, old) }
+      signal(this, "optionChange", this, option)
     },
 
-    getOption: function(option) {return this.options[option];},
-    getDoc: function() {return this.doc;},
+    getOption: function(option) {return this.options[option]},
+    getDoc: function() {return this.doc},
 
     addKeyMap: function(map, bottom) {
-      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
+      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map))
     },
     removeKeyMap: function(map) {
-      var maps = this.state.keyMaps;
+      var maps = this.state.keyMaps
       for (var i = 0; i < maps.length; ++i)
-        if (maps[i] == map || maps[i].name == map) {
-          maps.splice(i, 1);
-          return true;
-        }
+        { if (maps[i] == map || maps[i].name == map) {
+          maps.splice(i, 1)
+          return true
+        } }
     },
 
     addOverlay: methodOp(function(spec, options) {
-      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
-      if (mode.startState) throw new Error("Overlays may not be stateful.");
-      this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
-      this.state.modeGen++;
-      regChange(this);
+      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec)
+      if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+      insertSorted(this.state.overlays,
+                   {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+                    priority: (options && options.priority) || 0},
+                   function (overlay) { return overlay.priority; })
+      this.state.modeGen++
+      regChange(this)
     }),
     removeOverlay: methodOp(function(spec) {
-      var overlays = this.state.overlays;
+      var this$1 = this;
+
+      var overlays = this.state.overlays
       for (var i = 0; i < overlays.length; ++i) {
-        var cur = overlays[i].modeSpec;
+        var cur = overlays[i].modeSpec
         if (cur == spec || typeof spec == "string" && cur.name == spec) {
-          overlays.splice(i, 1);
-          this.state.modeGen++;
-          regChange(this);
-          return;
+          overlays.splice(i, 1)
+          this$1.state.modeGen++
+          regChange(this$1)
+          return
         }
       }
     }),
 
     indentLine: methodOp(function(n, dir, aggressive) {
       if (typeof dir != "string" && typeof dir != "number") {
-        if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
-        else dir = dir ? "add" : "subtract";
+        if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev" }
+        else { dir = dir ? "add" : "subtract" }
       }
-      if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
+      if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive) }
     }),
     indentSelection: methodOp(function(how) {
-      var ranges = this.doc.sel.ranges, end = -1;
+      var this$1 = this;
+
+      var ranges = this.doc.sel.ranges, end = -1
       for (var i = 0; i < ranges.length; i++) {
-        var range = ranges[i];
+        var range = ranges[i]
         if (!range.empty()) {
-          var from = range.from(), to = range.to();
-          var start = Math.max(end, from.line);
-          end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+          var from = range.from(), to = range.to()
+          var start = Math.max(end, from.line)
+          end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1
           for (var j = start; j < end; ++j)
-            indentLine(this, j, how);
-          var newRanges = this.doc.sel.ranges;
+            { indentLine(this$1, j, how) }
+          var newRanges = this$1.doc.sel.ranges
           if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
-            replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll);
+            { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll) }
         } else if (range.head.line > end) {
-          indentLine(this, range.head.line, how, true);
-          end = range.head.line;
-          if (i == this.doc.sel.primIndex) ensureCursorVisible(this);
+          indentLine(this$1, range.head.line, how, true)
+          end = range.head.line
+          if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1) }
         }
       }
     }),
 
     // Fetch the parser token for a given character. Useful for hacks
     // that want to inspect the mode state (say, for completion).
     getTokenAt: function(pos, precise) {
-      return takeToken(this, pos, precise);
+      return takeToken(this, pos, precise)
     },
 
     getLineTokens: function(line, precise) {
-      return takeToken(this, Pos(line), precise, true);
+      return takeToken(this, Pos(line), precise, true)
     },
 
     getTokenTypeAt: function(pos) {
-      pos = clipPos(this.doc, pos);
-      var styles = getLineStyles(this, getLine(this.doc, pos.line));
-      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
-      var type;
-      if (ch == 0) type = styles[2];
-      else for (;;) {
-        var mid = (before + after) >> 1;
-        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
-        else if (styles[mid * 2 + 1] < ch) before = mid + 1;
-        else { type = styles[mid * 2 + 2]; break; }
-      }
-      var cut = type ? type.indexOf("cm-overlay ") : -1;
-      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1);
+      pos = clipPos(this.doc, pos)
+      var styles = getLineStyles(this, getLine(this.doc, pos.line))
+      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch
+      var type
+      if (ch == 0) { type = styles[2] }
+      else { for (;;) {
+        var mid = (before + after) >> 1
+        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid }
+        else if (styles[mid * 2 + 1] < ch) { before = mid + 1 }
+        else { type = styles[mid * 2 + 2]; break }
+      } }
+      var cut = type ? type.indexOf("overlay ") : -1
+      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
     },
 
     getModeAt: function(pos) {
-      var mode = this.doc.mode;
-      if (!mode.innerMode) return mode;
-      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
+      var mode = this.doc.mode
+      if (!mode.innerMode) { return mode }
+      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
     },
 
     getHelper: function(pos, type) {
-      return this.getHelpers(pos, type)[0];
+      return this.getHelpers(pos, type)[0]
     },
 
     getHelpers: function(pos, type) {
-      var found = [];
-      if (!helpers.hasOwnProperty(type)) return found;
-      var help = helpers[type], mode = this.getModeAt(pos);
+      var this$1 = this;
+
+      var found = []
+      if (!helpers.hasOwnProperty(type)) { return found }
+      var help = helpers[type], mode = this.getModeAt(pos)
       if (typeof mode[type] == "string") {
-        if (help[mode[type]]) found.push(help[mode[type]]);
+        if (help[mode[type]]) { found.push(help[mode[type]]) }
       } else if (mode[type]) {
         for (var i = 0; i < mode[type].length; i++) {
-          var val = help[mode[type][i]];
-          if (val) found.push(val);
+          var val = help[mode[type][i]]
+          if (val) { found.push(val) }
         }
       } else if (mode.helperType && help[mode.helperType]) {
-        found.push(help[mode.helperType]);
+        found.push(help[mode.helperType])
       } else if (help[mode.name]) {
-        found.push(help[mode.name]);
+        found.push(help[mode.name])
       }
-      for (var i = 0; i < help._global.length; i++) {
-        var cur = help._global[i];
-        if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
-          found.push(cur.val);
+      for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+        var cur = help._global[i$1]
+        if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
+          { found.push(cur.val) }
       }
-      return found;
+      return found
     },
 
     getStateAfter: function(line, precise) {
-      var doc = this.doc;
-      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
-      return getStateBefore(this, line + 1, precise);
+      var doc = this.doc
+      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line)
+      return getContextBefore(this, line + 1, precise).state
     },
 
     cursorCoords: function(start, mode) {
-      var pos, range = this.doc.sel.primary();
-      if (start == null) pos = range.head;
-      else if (typeof start == "object") pos = clipPos(this.doc, start);
-      else pos = start ? range.from() : range.to();
-      return cursorCoords(this, pos, mode || "page");
+      var pos, range = this.doc.sel.primary()
+      if (start == null) { pos = range.head }
+      else if (typeof start == "object") { pos = clipPos(this.doc, start) }
+      else { pos = start ? range.from() : range.to() }
+      return cursorCoords(this, pos, mode || "page")
     },
 
     charCoords: function(pos, mode) {
-      return charCoords(this, clipPos(this.doc, pos), mode || "page");
+      return charCoords(this, clipPos(this.doc, pos), mode || "page")
     },
 
     coordsChar: function(coords, mode) {
-      coords = fromCoordSystem(this, coords, mode || "page");
-      return coordsChar(this, coords.left, coords.top);
+      coords = fromCoordSystem(this, coords, mode || "page")
+      return coordsChar(this, coords.left, coords.top)
     },
 
     lineAtHeight: function(height, mode) {
-      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
-      return lineAtHeight(this.doc, height + this.display.viewOffset);
-    },
-    heightAtLine: function(line, mode) {
-      var end = false, lineObj;
-      if (typeof line == "number") {
-        var last = this.doc.first + this.doc.size - 1;
-        if (line < this.doc.first) line = this.doc.first;
-        else if (line > last) { line = last; end = true; }
-        lineObj = getLine(this.doc, line);
-      } else {
-        lineObj = line;
-      }
-      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top +
-        (end ? this.doc.height - heightAtLine(lineObj) : 0);
+      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
+      return lineAtHeight(this.doc, height + this.display.viewOffset)
     },
-
-    defaultTextHeight: function() { return textHeight(this.display); },
-    defaultCharWidth: function() { return charWidth(this.display); },
-
-    setGutterMarker: methodOp(function(line, gutterID, value) {
-      return changeLine(this.doc, line, "gutter", function(line) {
-        var markers = line.gutterMarkers || (line.gutterMarkers = {});
-        markers[gutterID] = value;
-        if (!value && isEmpty(markers)) line.gutterMarkers = null;
-        return true;
-      });
-    }),
-
-    clearGutter: methodOp(function(gutterID) {
-      var cm = this, doc = cm.doc, i = doc.first;
-      doc.iter(function(line) {
-        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
-          line.gutterMarkers[gutterID] = null;
-          regLineChange(cm, i, "gutter");
-          if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
-        }
-        ++i;
-      });
-    }),
-
-    lineInfo: function(line) {
+    heightAtLine: function(line, mode, includeWidgets) {
+      var end = false, lineObj
       if (typeof line == "number") {
-        if (!isLine(this.doc, line)) return null;
-        var n = line;
-        line = getLine(this.doc, line);
-        if (!line) return null;
+        var last = this.doc.first + this.doc.size - 1
+        if (line < this.doc.first) { line = this.doc.first }
+        else if (line > last) { line = last; end = true }
+        lineObj = getLine(this.doc, line)
       } else {
-        var n = lineNo(line);
-        if (n == null) return null;
+        lineObj = line
       }
-      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
-              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
-              widgets: line.widgets};
+      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+        (end ? this.doc.height - heightAtLine(lineObj) : 0)
     },
 
-    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};},
+    defaultTextHeight: function() { return textHeight(this.display) },
+    defaultCharWidth: function() { return charWidth(this.display) },
+
+    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
 
     addWidget: function(pos, node, scroll, vert, horiz) {
-      var display = this.display;
-      pos = cursorCoords(this, clipPos(this.doc, pos));
-      var top = pos.bottom, left = pos.left;
-      node.style.position = "absolute";
-      node.setAttribute("cm-ignore-events", "true");
-      this.display.input.setUneditable(node);
-      display.sizer.appendChild(node);
+      var display = this.display
+      pos = cursorCoords(this, clipPos(this.doc, pos))
+      var top = pos.bottom, left = pos.left
+      node.style.position = "absolute"
+      node.setAttribute("cm-ignore-events", "true")
+      this.display.input.setUneditable(node)
+      display.sizer.appendChild(node)
       if (vert == "over") {
-        top = pos.top;
+        top = pos.top
       } else if (vert == "above" || vert == "near") {
         var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
-        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth)
         // Default to positioning above (if specified and possible); otherwise default to positioning below
         if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
-          top = pos.top - node.offsetHeight;
+          { top = pos.top - node.offsetHeight }
         else if (pos.bottom + node.offsetHeight <= vspace)
-          top = pos.bottom;
+          { top = pos.bottom }
         if (left + node.offsetWidth > hspace)
-          left = hspace - node.offsetWidth;
+          { left = hspace - node.offsetWidth }
       }
-      node.style.top = top + "px";
-      node.style.left = node.style.right = "";
+      node.style.top = top + "px"
+      node.style.left = node.style.right = ""
       if (horiz == "right") {
-        left = display.sizer.clientWidth - node.offsetWidth;
-        node.style.right = "0px";
+        left = display.sizer.clientWidth - node.offsetWidth
+        node.style.right = "0px"
       } else {
-        if (horiz == "left") left = 0;
-        else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
-        node.style.left = left + "px";
+        if (horiz == "left") { left = 0 }
+        else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2 }
+        node.style.left = left + "px"
       }
       if (scroll)
-        scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
+        { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}) }
     },
 
     triggerOnKeyDown: methodOp(onKeyDown),
     triggerOnKeyPress: methodOp(onKeyPress),
     triggerOnKeyUp: onKeyUp,
+    triggerOnMouseDown: methodOp(onMouseDown),
 
     execCommand: function(cmd) {
       if (commands.hasOwnProperty(cmd))
-        return commands[cmd].call(null, this);
+        { return commands[cmd].call(null, this) }
     },
 
-    triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+    triggerElectric: methodOp(function(text) { triggerElectric(this, text) }),
 
     findPosH: function(from, amount, unit, visually) {
-      var dir = 1;
-      if (amount < 0) { dir = -1; amount = -amount; }
-      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
-        cur = findPosH(this.doc, cur, dir, unit, visually);
-        if (cur.hitSide) break;
+      var this$1 = this;
+
+      var dir = 1
+      if (amount < 0) { dir = -1; amount = -amount }
+      var cur = clipPos(this.doc, from)
+      for (var i = 0; i < amount; ++i) {
+        cur = findPosH(this$1.doc, cur, dir, unit, visually)
+        if (cur.hitSide) { break }
       }
-      return cur;
+      return cur
     },
 
     moveH: methodOp(function(dir, unit) {
-      var cm = this;
-      cm.extendSelectionsBy(function(range) {
-        if (cm.display.shift || cm.doc.extend || range.empty())
-          return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisually);
+      var this$1 = this;
+
+      this.extendSelectionsBy(function (range) {
+        if (this$1.display.shift || this$1.doc.extend || range.empty())
+          { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
         else
-          return dir < 0 ? range.from() : range.to();
-      }, sel_move);
+          { return dir < 0 ? range.from() : range.to() }
+      }, sel_move)
     }),
 
     deleteH: methodOp(function(dir, unit) {
-      var sel = this.doc.sel, doc = this.doc;
+      var sel = this.doc.sel, doc = this.doc
       if (sel.somethingSelected())
-        doc.replaceSelection("", null, "+delete");
+        { doc.replaceSelection("", null, "+delete") }
       else
-        deleteNearSelection(this, function(range) {
-          var other = findPosH(doc, range.head, dir, unit, false);
-          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other};
-        });
+        { deleteNearSelection(this, function (range) {
+          var other = findPosH(doc, range.head, dir, unit, false)
+          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
+        }) }
     }),
 
     findPosV: function(from, amount, unit, goalColumn) {
-      var dir = 1, x = goalColumn;
-      if (amount < 0) { dir = -1; amount = -amount; }
-      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
-        var coords = cursorCoords(this, cur, "div");
-        if (x == null) x = coords.left;
-        else coords.left = x;
-        cur = findPosV(this, coords, dir, unit);
-        if (cur.hitSide) break;
+      var this$1 = this;
+
+      var dir = 1, x = goalColumn
+      if (amount < 0) { dir = -1; amount = -amount }
+      var cur = clipPos(this.doc, from)
+      for (var i = 0; i < amount; ++i) {
+        var coords = cursorCoords(this$1, cur, "div")
+        if (x == null) { x = coords.left }
+        else { coords.left = x }
+        cur = findPosV(this$1, coords, dir, unit)
+        if (cur.hitSide) { break }
       }
-      return cur;
+      return cur
     },
 
     moveV: methodOp(function(dir, unit) {
-      var cm = this, doc = this.doc, goals = [];
-      var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelected();
-      doc.extendSelectionsBy(function(range) {
+      var this$1 = this;
+
+      var doc = this.doc, goals = []
+      var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected()
+      doc.extendSelectionsBy(function (range) {
         if (collapse)
-          return dir < 0 ? range.from() : range.to();
-        var headPos = cursorCoords(cm, range.head, "div");
-        if (range.goalColumn != null) headPos.left = range.goalColumn;
-        goals.push(headPos.left);
-        var pos = findPosV(cm, headPos, dir, unit);
+          { return dir < 0 ? range.from() : range.to() }
+        var headPos = cursorCoords(this$1, range.head, "div")
+        if (range.goalColumn != null) { headPos.left = range.goalColumn }
+        goals.push(headPos.left)
+        var pos = findPosV(this$1, headPos, dir, unit)
         if (unit == "page" && range == doc.sel.primary())
-          addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top);
-        return pos;
-      }, sel_move);
-      if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++)
-        doc.sel.ranges[i].goalColumn = goals[i];
+          { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top) }
+        return pos
+      }, sel_move)
+      if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+        { doc.sel.ranges[i].goalColumn = goals[i] } }
     }),
 
     // Find the word at the given position (as returned by coordsChar).
     findWordAt: function(pos) {
-      var doc = this.doc, line = getLine(doc, pos.line).text;
-      var start = pos.ch, end = pos.ch;
+      var doc = this.doc, line = getLine(doc, pos.line).text
+      var start = pos.ch, end = pos.ch
       if (line) {
-        var helper = this.getHelper(pos, "wordChars");
-        if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
-        var startChar = line.charAt(start);
+        var helper = this.getHelper(pos, "wordChars")
+        if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end }
+        var startChar = line.charAt(start)
         var check = isWordChar(startChar, helper)
-          ? function(ch) { return isWordChar(ch, helper); }
-          : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
-          : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
-        while (start > 0 && check(line.charAt(start - 1))) --start;
-        while (end < line.length && check(line.charAt(end))) ++end;
+          ? function (ch) { return isWordChar(ch, helper); }
+          : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+          : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); }
+        while (start > 0 && check(line.charAt(start - 1))) { --start }
+        while (end < line.length && check(line.charAt(end))) { ++end }
       }
-      return new Range(Pos(pos.line, start), Pos(pos.line, end));
+      return new Range(Pos(pos.line, start), Pos(pos.line, end))
     },
 
     toggleOverwrite: function(value) {
-      if (value != null && value == this.state.overwrite) return;
+      if (value != null && value == this.state.overwrite) { return }
       if (this.state.overwrite = !this.state.overwrite)
-        addClass(this.display.cursorDiv, "CodeMirror-overwrite");
+        { addClass(this.display.cursorDiv, "CodeMirror-overwrite") }
       else
-        rmClass(this.display.cursorDiv, "CodeMirror-overwrite");
-
-      signal(this, "overwriteToggle", this, this.state.overwrite);
+        { rmClass(this.display.cursorDiv, "CodeMirror-overwrite") }
+
+      signal(this, "overwriteToggle", this, this.state.overwrite)
     },
-    hasFocus: function() { return this.display.input.getField() == activeElt(); },
-    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit); },
-
-    scrollTo: methodOp(function(x, y) {
-      if (x != null || y != null) resolveScrollToPos(this);
-      if (x != null) this.curOp.scrollLeft = x;
-      if (y != null) this.curOp.scrollTop = y;
-    }),
+    hasFocus: function() { return this.display.input.getField() == activeElt() },
+    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+    scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y) }),
     getScrollInfo: function() {
-      var scroller = this.display.scroller;
+      var scroller = this.display.scroller
       return {left: scroller.scrollLeft, top: scroller.scrollTop,
               height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
               width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
-              clientHeight: displayHeight(this), clientWidth: displayWidth(this)};
+              clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
     },
 
     scrollIntoView: methodOp(function(range, margin) {
       if (range == null) {
-        range = {from: this.doc.sel.primary().head, to: null};
-        if (margin == null) margin = this.options.cursorScrollMargin;
+        range = {from: this.doc.sel.primary().head, to: null}
+        if (margin == null) { margin = this.options.cursorScrollMargin }
       } else if (typeof range == "number") {
-        range = {from: Pos(range, 0), to: null};
+        range = {from: Pos(range, 0), to: null}
       } else if (range.from == null) {
-        range = {from: range, to: null};
+        range = {from: range, to: null}
       }
-      if (!range.to) range.to = range.from;
-      range.margin = margin || 0;
+      if (!range.to) { range.to = range.from }
+      range.margin = margin || 0
 
       if (range.from.line != null) {
-        resolveScrollToPos(this);
-        this.curOp.scrollToPos = range;
+        scrollToRange(this, range)
       } else {
-        var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.left),
-                                      Math.min(range.from.top, range.to.top) - range.margin,
-                                      Math.max(range.from.right, range.to.right),
-                                      Math.max(range.from.bottom, range.to.bottom) + range.margin);
-        this.scrollTo(sPos.scrollLeft, sPos.scrollTop);
+        scrollToCoordsRange(this, range.from, range.to, range.margin)
       }
     }),
 
     setSize: methodOp(function(width, height) {
-      var cm = this;
-      function interpret(val) {
-        return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
-      }
-      if (width != null) cm.display.wrapper.style.width = interpret(width);
-      if (height != null) cm.display.wrapper.style.height = interpret(height);
-      if (cm.options.lineWrapping) clearLineMeasurementCache(this);
-      var lineNo = cm.display.viewFrom;
-      cm.doc.iter(lineNo, cm.display.viewTo, function(line) {
-        if (line.widgets) for (var i = 0; i < line.widgets.length; i++)
-          if (line.widgets[i].noHScroll) { regLineChange(cm, lineNo, "widget"); break; }
-        ++lineNo;
-      });
-      cm.curOp.forceUpdate = true;
-      signal(cm, "refresh", this);
+      var this$1 = this;
+
+      var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; }
+      if (width != null) { this.display.wrapper.style.width = interpret(width) }
+      if (height != null) { this.display.wrapper.style.height = interpret(height) }
+      if (this.options.lineWrapping) { clearLineMeasurementCache(this) }
+      var lineNo = this.display.viewFrom
+      this.doc.iter(lineNo, this.display.viewTo, function (line) {
+        if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+          { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
+        ++lineNo
+      })
+      this.curOp.forceUpdate = true
+      signal(this, "refresh", this)
     }),
 
-    operation: function(f){return runInOp(this, f);},
+    operation: function(f){return runInOp(this, f)},
 
     refresh: methodOp(function() {
-      var oldHeight = this.display.cachedTextHeight;
-      regChange(this);
-      this.curOp.forceUpdate = true;
-      clearCaches(this);
-      this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
-      updateGutterSpace(this);
+      var oldHeight = this.display.cachedTextHeight
+      regChange(this)
+      this.curOp.forceUpdate = true
+      clearCaches(this)
+      scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop)
+      updateGutterSpace(this)
       if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
-        estimateLineHeights(this);
-      signal(this, "refresh", this);
+        { estimateLineHeights(this) }
+      signal(this, "refresh", this)
     }),
 
     swapDoc: methodOp(function(doc) {
-      var old = this.doc;
-      old.cm = null;
-      attachDoc(this, doc);
-      clearCaches(this);
-      this.display.input.reset();
-      this.scrollTo(doc.scrollLeft, doc.scrollTop);
-      this.curOp.forceScroll = true;
-      signalLater(this, "swapDoc", this, old);
-      return old;
+      var old = this.doc
+      old.cm = null
+      attachDoc(this, doc)
+      clearCaches(this)
+      this.display.input.reset()
+      scrollToCoords(this, doc.scrollLeft, doc.scrollTop)
+      this.curOp.forceScroll = true
+      signalLater(this, "swapDoc", this, old)
+      return old
     }),
 
-    getInputField: function(){return this.display.input.getField();},
-    getWrapperElement: function(){return this.display.wrapper;},
-    getScrollerElement: function(){return this.display.scroller;},
-    getGutterElement: function(){return this.display.gutters;}
-  };
-  eventMixin(CodeMirror);
-
-  // OPTION DEFAULTS
-
-  // The default configuration options.
-  var defaults = CodeMirror.defaults = {};
-  // Functions to run when options are changed.
-  var optionHandlers = CodeMirror.optionHandlers = {};
-
-  function option(name, deflt, handle, notOnInit) {
-    CodeMirror.defaults[name] = deflt;
-    if (handle) optionHandlers[name] =
-      notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
-  }
-
-  // Passed to option handlers when there is no old value.
-  var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
-
-  // These two are, on init, called from the constructor because they
-  // have to be initialized before the editor can start at all.
-  option("value", "", function(cm, val) {
-    cm.setValue(val);
-  }, true);
-  option("mode", null, function(cm, val) {
-    cm.doc.modeOption = val;
-    loadMode(cm);
-  }, true);
-
-  option("indentUnit", 2, loadMode, true);
-  option("indentWithTabs", false);
-  option("smartIndent", true);
-  option("tabSize", 4, function(cm) {
-    resetModeState(cm);
-    clearCaches(cm);
-    regChange(cm);
-  }, true);
-  option("lineSeparator", null, function(cm, val) {
-    cm.doc.lineSep = val;
-    if (!val) return;
-    var newBreaks = [], lineNo = cm.doc.first;
-    cm.doc.iter(function(line) {
-      for (var pos = 0;;) {
-        var found = line.text.indexOf(val, pos);
-        if (found == -1) break;
-        pos = found + val.length;
-        newBreaks.push(Pos(lineNo, found));
-      }
-      lineNo++;
-    });
-    for (var i = newBreaks.length - 1; i >= 0; i--)
-      replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length))
-  });
-  option("specialChars", /[\u0000-\u001f\u007f\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val, old) {
-    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
-    if (old != CodeMirror.Init) cm.refresh();
-  });
-  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
-  option("electricChars", true);
-  option("inputStyle", mobile ? "contenteditable" : "textarea", function() {
-    throw new Error("inputStyle can not (yet) be changed in a running editor"); // FIXME
-  }, true);
-  option("rtlMoveVisually", !windows);
-  option("wholeLineUpdateBefore", true);
-
-  option("theme", "default", function(cm) {
-    themeChanged(cm);
-    guttersChanged(cm);
-  }, true);
-  option("keyMap", "default", function(cm, val, old) {
-    var next = getKeyMap(val);
-    var prev = old != CodeMirror.Init && getKeyMap(old);
-    if (prev && prev.detach) prev.detach(cm, next);
-    if (next.attach) next.attach(cm, prev || null);
-  });
-  option("extraKeys", null);
-
-  option("lineWrapping", false, wrappingChanged, true);
-  option("gutters", [], function(cm) {
-    setGuttersForLineNumbers(cm.options);
-    guttersChanged(cm);
-  }, true);
-  option("fixedGutter", true, function(cm, val) {
-    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
-    cm.refresh();
-  }, true);
-  option("coverGutterNextToScrollbar", false, function(cm) {updateScrollbars(cm);}, true);
-  option("scrollbarStyle", "native", function(cm) {
-    initScrollbars(cm);
-    updateScrollbars(cm);
-    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
-    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
-  }, true);
-  option("lineNumbers", false, function(cm) {
-    setGuttersForLineNumbers(cm.options);
-    guttersChanged(cm);
-  }, true);
-  option("firstLineNumber", 1, guttersChanged, true);
-  option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
-  option("showCursorWhenSelecting", false, updateSelection, true);
-
-  option("resetSelectionOnContextMenu", true);
-  option("lineWiseCopyCut", true);
-
-  option("readOnly", false, function(cm, val) {
-    if (val == "nocursor") {
-      onBlur(cm);
-      cm.display.input.blur();
-      cm.display.disabled = true;
-    } else {
-      cm.display.disabled = false;
-    }
-    cm.display.input.readOnlyChanged(val)
-  });
-  option("disableInput", false, function(cm, val) {if (!val) cm.display.input.reset();}, true);
-  option("dragDrop", true, dragDropChanged);
-  option("allowDropFileTypes", null);
-
-  option("cursorBlinkRate", 530);
-  option("cursorScrollMargin", 0);
-  option("cursorHeight", 1, updateSelection, true);
-  option("singleCursorHeightPerLine", true, updateSelection, true);
-  option("workTime", 100);
-  option("workDelay", 100);
-  option("flattenSpans", true, resetModeState, true);
-  option("addModeClass", false, resetModeState, true);
-  option("pollInterval", 100);
-  option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;});
-  option("historyEventDelay", 1250);
-  option("viewportMargin", 10, function(cm){cm.refresh();}, true);
-  option("maxHighlightLength", 10000, resetModeState, true);
-  option("moveInputWithCursor", true, function(cm, val) {
-    if (!val) cm.display.input.resetPosition();
-  });
-
-  option("tabindex", null, function(cm, val) {
-    cm.display.input.getField().tabIndex = val || "";
-  });
-  option("autofocus", null);
-
-  // MODE DEFINITION AND QUERYING
-
-  // Known modes, by name and by MIME
-  var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
-
-  // Extra arguments are stored as the mode's dependencies, which is
-  // used by (legacy) mechanisms like loadmode.js to automatically
-  // load a mode. (Preferred mechanism is the require/define calls.)
-  CodeMirror.defineMode = function(name, mode) {
-    if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
-    if (arguments.length > 2)
-      mode.dependencies = Array.prototype.slice.call(arguments, 2);
-    modes[name] = mode;
-  };
-
-  CodeMirror.defineMIME = function(mime, spec) {
-    mimeModes[mime] = spec;
-  };
-
-  // Given a MIME type, a {name, ...options} config object, or a name
-  // string, return a mode config object.
-  CodeMirror.resolveMode = function(spec) {
-    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
-      spec = mimeModes[spec];
-    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
-      var found = mimeModes[spec.name];
-      if (typeof found == "string") found = {name: found};
-      spec = createObj(found, spec);
-      spec.name = found.name;
-    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
-      return CodeMirror.resolveMode("application/xml");
-    }
-    if (typeof spec == "string") return {name: spec};
-    else return spec || {name: "null"};
-  };
-
-  // Given a mode spec (anything that resolveMode accepts), find and
-  // initialize an actual mode object.
-  CodeMirror.getMode = function(options, spec) {
-    var spec = CodeMirror.resolveMode(spec);
-    var mfactory = modes[spec.name];
-    if (!mfactory) return CodeMirror.getMode(options, "text/plain");
-    var modeObj = mfactory(options, spec);
-    if (modeExtensions.hasOwnProperty(spec.name)) {
-      var exts = modeExtensions[spec.name];
-      for (var prop in exts) {
-        if (!exts.hasOwnProperty(prop)) continue;
-        if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
-        modeObj[prop] = exts[prop];
-      }
-    }
-    modeObj.name = spec.name;
-    if (spec.helperType) modeObj.helperType = spec.helperType;
-    if (spec.modeProps) for (var prop in spec.modeProps)
-      modeObj[prop] = spec.modeProps[prop];
-
-    return modeObj;
-  };
-
-  // Minimal default mode.
-  CodeMirror.defineMode("null", function() {
-    return {token: function(stream) {stream.skipToEnd();}};
-  });
-  CodeMirror.defineMIME("text/plain", "null");
-
-  // This can be used to attach properties to mode objects from
-  // outside the actual mode definition.
-  var modeExtensions = CodeMirror.modeExtensions = {};
-  CodeMirror.extendMode = function(mode, properties) {
-    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
-    copyObj(properties, exts);
-  };
-
-  // EXTENSIONS
-
-  CodeMirror.defineExtension = function(name, func) {
-    CodeMirror.prototype[name] = func;
-  };
-  CodeMirror.defineDocExtension = function(name, func) {
-    Doc.prototype[name] = func;
-  };
-  CodeMirror.defineOption = option;
-
-  var initHooks = [];
-  CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
-
-  var helpers = CodeMirror.helpers = {};
+    getInputField: function(){return this.display.input.getField()},
+    getWrapperElement: function(){return this.display.wrapper},
+    getScrollerElement: function(){return this.display.scroller},
+    getGutterElement: function(){return this.display.gutters}
+  }
+  eventMixin(CodeMirror)
+
   CodeMirror.registerHelper = function(type, name, value) {
-    if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
-    helpers[type][name] = value;
-  };
+    if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []} }
+    helpers[type][name] = value
+  }
   CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
-    CodeMirror.registerHelper(type, name, value);
-    helpers[type]._global.push({pred: predicate, val: value});
-  };
-
-  // MODE STATE HANDLING
-
-  // Utility functions for working with state. Exported because nested
-  // modes need to do this for their inner modes.
-
-  var copyState = CodeMirror.copyState = function(mode, state) {
-    if (state === true) return state;
-    if (mode.copyState) return mode.copyState(state);
-    var nstate = {};
-    for (var n in state) {
-      var val = state[n];
-      if (val instanceof Array) val = val.concat([]);
-      nstate[n] = val;
-    }
-    return nstate;
-  };
-
-  var startState = CodeMirror.startState = function(mode, a1, a2) {
-    return mode.startState ? mode.startState(a1, a2) : true;
-  };
-
-  // Given a mode and a state (for that mode), find the inner mode and
-  // state at the position that the state refers to.
-  CodeMirror.innerMode = function(mode, state) {
-    while (mode.innerMode) {
-      var info = mode.innerMode(state);
-      if (!info || info.mode == mode) break;
-      state = info.state;
-      mode = info.mode;
-    }
-    return info || {mode: mode, state: state};
-  };
-
-  // STANDARD COMMANDS
-
-  // Commands are parameter-less actions that can be performed on an
-  // editor, mostly used for keybindings.
-  var commands = CodeMirror.commands = {
-    selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);},
-    singleSelection: function(cm) {
-      cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll);
-    },
-    killLine: function(cm) {
-      deleteNearSelection(cm, function(range) {
-        if (range.empty()) {
-          var len = getLine(cm.doc, range.head.line).text.length;
-          if (range.head.ch == len && range.head.line < cm.lastLine())
-            return {from: range.head, to: Pos(range.head.line + 1, 0)};
-          else
-            return {from: range.head, to: Pos(range.head.line, len)};
-        } else {
-          return {from: range.from(), to: range.to()};
-        }
-      });
-    },
-    deleteLine: function(cm) {
-      deleteNearSelection(cm, function(range) {
-        return {from: Pos(range.from().line, 0),
-                to: clipPos(cm.doc, Pos(range.to().line + 1, 0))};
-      });
-    },
-    delLineLeft: function(cm) {
-      deleteNearSelection(cm, function(range) {
-        return {from: Pos(range.from().line, 0), to: range.from()};
-      });
-    },
-    delWrappedLineLeft: function(cm) {
-      deleteNearSelection(cm, function(range) {
-        var top = cm.charCoords(range.head, "div").top + 5;
-        var leftPos = cm.coordsChar({left: 0, top: top}, "div");
-        return {from: leftPos, to: range.from()};
-      });
-    },
-    delWrappedLineRight: function(cm) {
-      deleteNearSelection(cm, function(range) {
-        var top = cm.charCoords(range.head, "div").top + 5;
-        var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
-        return {from: range.from(), to: rightPos };
-      });
-    },
-    undo: function(cm) {cm.undo();},
-    redo: function(cm) {cm.redo();},
-    undoSelection: function(cm) {cm.undoSelection();},
-    redoSelection: function(cm) {cm.redoSelection();},
-    goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
-    goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
-    goLineStart: function(cm) {
-      cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.line); },
-                            {origin: "+move", bias: 1});
-    },
-    goLineStartSmart: function(cm) {
-      cm.extendSelectionsBy(function(range) {
-        return lineStartSmart(cm, range.head);
-      }, {origin: "+move", bias: 1});
-    },
-    goLineEnd: function(cm) {
-      cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); },
-                            {origin: "+move", bias: -1});
-    },
-    goLineRight: function(cm) {
-      cm.extendSelectionsBy(function(range) {
-        var top = cm.charCoords(range.head, "div").top + 5;
-        return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
-      }, sel_move);
-    },
-    goLineLeft: function(cm) {
-      cm.extendSelectionsBy(function(range) {
-        var top = cm.charCoords(range.head, "div").top + 5;
-        return cm.coordsChar({left: 0, top: top}, "div");
-      }, sel_move);
-    },
-    goLineLeftSmart: function(cm) {
-      cm.extendSelectionsBy(function(range) {
-        var top = cm.charCoords(range.head, "div").top + 5;
-        var pos = cm.coordsChar({left: 0, top: top}, "div");
-        if (pos.ch < cm.getLine(pos.line).search(/\S/)) return lineStartSmart(cm, range.head);
-        return pos;
-      }, sel_move);
-    },
-    goLineUp: function(cm) {cm.moveV(-1, "line");},
-    goLineDown: function(cm) {cm.moveV(1, "line");},
-    goPageUp: function(cm) {cm.moveV(-1, "page");},
-    goPageDown: function(cm) {cm.moveV(1, "page");},
-    goCharLeft: function(cm) {cm.moveH(-1, "char");},
-    goCharRight: function(cm) {cm.moveH(1, "char");},
-    goColumnLeft: function(cm) {cm.moveH(-1, "column");},
-    goColumnRight: function(cm) {cm.moveH(1, "column");},
-    goWordLeft: function(cm) {cm.moveH(-1, "word");},
-    goGroupRight: function(cm) {cm.moveH(1, "group");},
-    goGroupLeft: function(cm) {cm.moveH(-1, "group");},
-    goWordRight: function(cm) {cm.moveH(1, "word");},
-    delCharBefore: function(cm) {cm.deleteH(-1, "char");},
-    delCharAfter: function(cm) {cm.deleteH(1, "char");},
-    delWordBefore: function(cm) {cm.deleteH(-1, "word");},
-    delWordAfter: function(cm) {cm.deleteH(1, "word");},
-    delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
-    delGroupAfter: function(cm) {cm.deleteH(1, "group");},
-    indentAuto: function(cm) {cm.indentSelection("smart");},
-    indentMore: function(cm) {cm.indentSelection("add");},
-    indentLess: function(cm) {cm.indentSelection("subtract");},
-    insertTab: function(cm) {cm.replaceSelection("\t");},
-    insertSoftTab: function(cm) {
-      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
-      for (var i = 0; i < ranges.length; i++) {
-        var pos = ranges[i].from();
-        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
-        spaces.push(spaceStr(tabSize - col % tabSize));
+    CodeMirror.registerHelper(type, name, value)
+    helpers[type]._global.push({pred: predicate, val: value})
+  }
+}
+
+// Used for horizontal relative motion. Dir is -1 or 1 (left or
+// right), unit can be "char", "column" (like char, but doesn't
+// cross line boundaries), "word" (across next word), or "group" (to
+// the start of next group of word or non-word-non-whitespace
+// chars). The visually param controls whether, in right-to-left
+// text, direction 1 means to move towards the next index in the
+// string, or towards the character to the right of the current
+// position. The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosH(doc, pos, dir, unit, visually) {
+  var oldPos = pos
+  var origDir = dir
+  var lineObj = getLine(doc, pos.line)
+  function findNextLine() {
+    var l = pos.line + dir
+    if (l < doc.first || l >= doc.first + doc.size) { return false }
+    pos = new Pos(l, pos.ch, pos.sticky)
+    return lineObj = getLine(doc, l)
+  }
+  function moveOnce(boundToLine) {
+    var next
+    if (visually) {
+      next = moveVisually(doc.cm, lineObj, pos, dir)
+    } else {
+      next = moveLogically(lineObj, pos, dir)
+    }
+    if (next == null) {
+      if (!boundToLine && findNextLine())
+        { pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir) }
+      else
+        { return false }
+    } else {
+      pos = next
+    }
+    return true
+  }
+
+  if (unit == "char") {
+    moveOnce()
+  } else if (unit == "column") {
+    moveOnce(true)
+  } else if (unit == "word" || unit == "group") {
+    var sawType = null, group = unit == "group"
+    var helper = doc.cm && doc.cm.getHelper(pos, "wordChars")
+    for (var first = true;; first = false) {
+      if (dir < 0 && !moveOnce(!first)) { break }
+      var cur = lineObj.text.charAt(pos.ch) || "\n"
+      var type = isWordChar(cur, helper) ? "w"
+        : group && cur == "\n" ? "n"
+        : !group || /\s/.test(cur) ? null
+        : "p"
+      if (group && !first && !type) { type = "s" }
+      if (sawType && sawType != type) {
+        if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after"}
+        break
       }
-      cm.replaceSelections(spaces);
-    },
-    defaultTab: function(cm) {
-      if (cm.somethingSelected()) cm.indentSelection("add");
-      else cm.execCommand("insertTab");
-    },
-    transposeChars: function(cm) {
-      runInOp(cm, function() {
-        var ranges = cm.listSelections(), newSel = [];
-        for (var i = 0; i < ranges.length; i++) {
-          var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
-          if (line) {
-            if (cur.ch == line.length) cur = new Pos(cur.line, cur.ch - 1);
-            if (cur.ch > 0) {
-              cur = new Pos(cur.line, cur.ch + 1);
-              cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
-                              Pos(cur.line, cur.ch - 2), cur, "+transpose");
-            } else if (cur.line > cm.doc.first) {
-              var prev = getLine(cm.doc, cur.line - 1).text;
-              if (prev)
-                cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
-                                prev.charAt(prev.length - 1),
-                                Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose");
-            }
-          }
-          newSel.push(new Range(cur, cur));
-        }
-        cm.setSelections(newSel);
-      });
-    },
-    newlineAndIndent: function(cm) {
-      runInOp(cm, function() {
-        var len = cm.listSelections().length;
-        for (var i = 0; i < len; i++) {
-          var range = cm.listSelections()[i];
-          cm.replaceRange(cm.doc.lineSeparator(), range.anchor, range.head, "+input");
-          cm.indentLine(range.from().line + 1, null, true);
-        }
-        ensureCursorVisible(cm);
-      });
-    },
-    openLine: function(cm) {cm.replaceSelection("\n", "start")},
-    toggleOverwrite: function(cm) {cm.toggleOverwrite();}
-  };
-
-
-  // STANDARD KEYMAPS
-
-  var keyMap = CodeMirror.keyMap = {};
-
-  keyMap.basic = {
-    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
-    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
-    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
-    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
-    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
-    "Esc": "singleSelection"
-  };
-  // Note that the save and find-related commands aren't defined by
-  // default. User code or addons can define them. Unknown commands
-  // are simply ignored.
-  keyMap.pcDefault = {
-    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
-    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
-    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
-    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
-    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
-    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
-    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
-    fallthrough: "basic"
-  };
-  // Very basic readline/emacs-style bindings, which are standard on Mac.
-  keyMap.emacsy = {
-    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
-    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
-    "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
-    "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
-    "Ctrl-O": "openLine"
-  };
-  keyMap.macDefault = {
-    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
-    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
-    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
-    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
-    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
-    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
-    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
-    fallthrough: ["basic", "emacsy"]
-  };
-  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
-
-  // KEYMAP DISPATCH
-
-  function normalizeKeyName(name) {
-    var parts = name.split(/-(?!$)/), name = parts[parts.length - 1];
-    var alt, ctrl, shift, cmd;
-    for (var i = 0; i < parts.length - 1; i++) {
-      var mod = parts[i];
-      if (/^(cmd|meta|m)$/i.test(mod)) cmd = true;
-      else if (/^a(lt)?$/i.test(mod)) alt = true;
-      else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;
-      else if (/^s(hift)$/i.test(mod)) shift = true;
-      else throw new Error("Unrecognized modifier name: " + mod);
-    }
-    if (alt) name = "Alt-" + name;
-    if (ctrl) name = "Ctrl-" + name;
-    if (cmd) name = "Cmd-" + name;
-    if (shift) name = "Shift-" + name;
-    return name;
-  }
-
-  // This is a kludge to keep keymaps mostly working as raw objects
-  // (backwards compatibility) while at the same time support features
-  // like normalization and multi-stroke key bindings. It compiles a
-  // new normalized keymap, and then updates the old object to reflect
-  // this.
-  CodeMirror.normalizeKeyMap = function(keymap) {
-    var copy = {};
-    for (var keyname in keymap) if (keymap.hasOwnProperty(keyname)) {
-      var value = keymap[keyname];
-      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue;
-      if (value == "...") { delete keymap[keyname]; continue; }
-
-      var keys = map(keyname.split(" "), normalizeKeyName);
-      for (var i = 0; i < keys.length; i++) {
-        var val, name;
-        if (i == keys.length - 1) {
-          name = keys.join(" ");
-          val = value;
-        } else {
-          name = keys.slice(0, i + 1).join(" ");
-          val = "...";
-        }
-        var prev = copy[name];
-        if (!prev) copy[name] = val;
-        else if (prev != val) throw new Error("Inconsistent bindings for " + name);
+
+      if (type) { sawType = type }
+      if (dir > 0 && !moveOnce(!first)) { break }
+    }
+  }
+  var result = skipAtomic(doc, pos, oldPos, origDir, true)
+  if (equalCursorPos(oldPos, result)) { result.hitSide = true }
+  return result
+}
+
+// For relative vertical movement. Dir may be -1 or 1. Unit can be
+// "page" or "line". The resulting position will have a hitSide=true
+// property if it reached the end of the document.
+function findPosV(cm, pos, dir, unit) {
+  var doc = cm.doc, x = pos.left, y
+  if (unit == "page") {
+    var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight)
+    var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3)
+    y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount
+
+  } else if (unit == "line") {
+    y = dir > 0 ? pos.bottom + 3 : pos.top - 3
+  }
+  var target
+  for (;;) {
+    target = coordsChar(cm, x, y)
+    if (!target.outside) { break }
+    if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+    y += dir * 5
+  }
+  return target
+}
+
+// CONTENTEDITABLE INPUT STYLE
+
+var ContentEditableInput = function(cm) {
+  this.cm = cm
+  this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
+  this.polling = new Delayed()
+  this.composing = null
+  this.gracePeriod = false
+  this.readDOMTimeout = null
+};
+
+ContentEditableInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = input.cm
+  var div = input.div = display.lineDiv
+  disableBrowserMagic(div, cm.options.spellcheck)
+
+  on(div, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+    // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+    if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20) }
+  })
+
+  on(div, "compositionstart", function (e) {
+    this$1.composing = {data: e.data, done: false}
+  })
+  on(div, "compositionupdate", function (e) {
+    if (!this$1.composing) { this$1.composing = {data: e.data, done: false} }
+  })
+  on(div, "compositionend", function (e) {
+    if (this$1.composing) {
+      if (e.data != this$1.composing.data) { this$1.readFromDOMSoon() }
+      this$1.composing.done = true
+    }
+  })
+
+  on(div, "touchstart", function () { return input.forceCompositionEnd(); })
+
+  on(div, "input", function () {
+    if (!this$1.composing) { this$1.readFromDOMSoon() }
+  })
+
+  function onCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()})
+      if (e.type == "cut") { cm.replaceSelection("", null, "cut") }
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm)
+      setLastCopied({lineWise: true, text: ranges.text})
+      if (e.type == "cut") {
+        cm.operation(function () {
+          cm.setSelections(ranges.ranges, 0, sel_dontScroll)
+          cm.replaceSelection("", null, "cut")
+        })
+      }
+    }
+    if (e.clipboardData) {
+      e.clipboardData.clearData()
+      var content = lastCopied.text.join("\n")
+      // iOS exposes the clipboard API, but seems to discard content inserted into it
+      e.clipboardData.setData("Text", content)
+      if (e.clipboardData.getData("Text") == content) {
+        e.preventDefault()
+        return
+      }
+    }
+    // Old-fashioned briefly-focus-a-textarea hack
+    var kludge = hiddenTextarea(), te = kludge.firstChild
+    cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
+    te.value = lastCopied.text.join("\n")
+    var hadFocus = document.activeElement
+    selectInput(te)
+    setTimeout(function () {
+      cm.display.lineSpace.removeChild(kludge)
+      hadFocus.focus()
+      if (hadFocus == div) { input.showPrimarySelection() }
+    }, 50)
+  }
+  on(div, "copy", onCopyCut)
+  on(div, "cut", onCopyCut)
+};
+
+ContentEditableInput.prototype.prepareSelection = function () {
+  var result = prepareSelection(this.cm, false)
+  result.focus = this.cm.state.focused
+  return result
+};
+
+ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+  if (!info || !this.cm.display.view.length) { return }
+  if (info.focus || takeFocus) { this.showPrimarySelection() }
+  this.showMultipleSelections(info)
+};
+
+ContentEditableInput.prototype.showPrimarySelection = function () {
+  var sel = window.getSelection(), cm = this.cm, prim = cm.doc.sel.primary()
+  var from = prim.from(), to = prim.to()
+
+  if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+    sel.removeAllRanges()
+    return
+  }
+
+  var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+  var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset)
+  if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+      cmp(minPos(curAnchor, curFocus), from) == 0 &&
+      cmp(maxPos(curAnchor, curFocus), to) == 0)
+    { return }
+
+  var view = cm.display.view
+  var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+      {node: view[0].measure.map[2], offset: 0}
+  var end = to.line < cm.display.viewTo && posToDOM(cm, to)
+  if (!end) {
+    var measure = view[view.length - 1].measure
+    var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
+    end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}
+  }
+
+  if (!start || !end) {
+    sel.removeAllRanges()
+    return
+  }
+
+  var old = sel.rangeCount && sel.getRangeAt(0), rng
+  try { rng = range(start.node, start.offset, end.offset, end.node) }
+  catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+  if (rng) {
+    if (!gecko && cm.state.focused) {
+      sel.collapse(start.node, start.offset)
+      if (!rng.collapsed) {
+        sel.removeAllRanges()
+        sel.addRange(rng)
       }
-      delete keymap[keyname];
-    }
-    for (var prop in copy) keymap[prop] = copy[prop];
-    return keymap;
-  };
-
-  var lookupKey = CodeMirror.lookupKey = function(key, map, handle, context) {
-    map = getKeyMap(map);
-    var found = map.call ? map.call(key, context) : map[key];
-    if (found === false) return "nothing";
-    if (found === "...") return "multi";
-    if (found != null && handle(found)) return "handled";
-
-    if (map.fallthrough) {
-      if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
-        return lookupKey(key, map.fallthrough, handle, context);
-      for (var i = 0; i < map.fallthrough.length; i++) {
-        var result = lookupKey(key, map.fallthrough[i], handle, context);
-        if (result) return result;
-      }
-    }
-  };
-
-  // Modifier key presses don't count as 'real' key presses for the
-  // purpose of keymap fallthrough.
-  var isModifierKey = CodeMirror.isModifierKey = function(value) {
-    var name = typeof value == "string" ? value : keyNames[value.keyCode];
-    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
-  };
-
-  // Look up the name of a key as indicated by an event object.
-  var keyName = CodeMirror.keyName = function(event, noShift) {
-    if (presto && event.keyCode == 34 && event["char"]) return false;
-    var base = keyNames[event.keyCode], name = base;
-    if (name == null || event.altGraphKey) return false;
-    if (event.altKey && base != "Alt") name = "Alt-" + name;
-    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name;
-    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") name = "Cmd-" + name;
-    if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name;
-    return name;
-  };
-
-  function getKeyMap(val) {
-    return typeof val == "string" ? keyMap[val] : val;
-  }
-
-  // FROMTEXTAREA
-
-  CodeMirror.fromTextArea = function(textarea, options) {
-    options = options ? copyObj(options) : {};
-    options.value = textarea.value;
-    if (!options.tabindex && textarea.tabIndex)
-      options.tabindex = textarea.tabIndex;
-    if (!options.placeholder && textarea.placeholder)
-      options.placeholder = textarea.placeholder;
-    // Set autofocus to true if this textarea is focused, or if it has
-    // autofocus and no other element is focused.
-    if (options.autofocus == null) {
-      var hasFocus = activeElt();
-      options.autofocus = hasFocus == textarea ||
-        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
-    }
-
-    function save() {textarea.value = cm.getValue();}
-    if (textarea.form) {
-      on(textarea.form, "submit", save);
-      // Deplorable hack to make the submit method do the right thing.
-      if (!options.leaveSubmitMethodAlone) {
-        var form = textarea.form, realSubmit = form.submit;
-        try {
-          var wrappedSubmit = form.submit = function() {
-            save();
-            form.submit = realSubmit;
-            form.submit();
-            form.submit = wrappedSubmit;
-          };
-        } catch(e) {}
-      }
-    }
-
-    options.finishInit = function(cm) {
-      cm.save = save;
-      cm.getTextArea = function() { return textarea; };
-      cm.toTextArea = function() {
-        cm.toTextArea = isNaN; // Prevent this from being ran twice
-        save();
-        textarea.parentNode.removeChild(cm.getWrapperElement());
-        textarea.style.display = "";
-        if (textarea.form) {
-          off(textarea.form, "submit", save);
-          if (typeof textarea.form.submit == "function")
-            textarea.form.submit = realSubmit;
-        }
-      };
-    };
-
-    textarea.style.display = "none";
-    var cm = CodeMirror(function(node) {
-      textarea.parentNode.insertBefore(node, textarea.nextSibling);
-    }, options);
-    return cm;
-  };
-
-  // STRING STREAM
-
-  // Fed to the mode parsers, provides helper functions to make
-  // parsers more succinct.
-
-  var StringStream = CodeMirror.StringStream = function(string, tabSize) {
-    this.pos = this.start = 0;
-    this.string = string;
-    this.tabSize = tabSize || 8;
-    this.lastColumnPos = this.lastColumnValue = 0;
-    this.lineStart = 0;
-  };
-
-  StringStream.prototype = {
-    eol: function() {return this.pos >= this.string.length;},
-    sol: function() {return this.pos == this.lineStart;},
-    peek: function() {return this.string.charAt(this.pos) || undefined;},
-    next: function() {
-      if (this.pos < this.string.length)
-        return this.string.charAt(this.pos++);
-    },
-    eat: function(match) {
-      var ch = this.string.charAt(this.pos);
-      if (typeof match == "string") var ok = ch == match;
-      else var ok = ch && (match.test ? match.test(ch) : match(ch));
-      if (ok) {++this.pos; return ch;}
-    },
-    eatWhile: function(match) {
-      var start = this.pos;
-      while (this.eat(match)){}
-      return this.pos > start;
-    },
-    eatSpace: function() {
-      var start = this.pos;
-      while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
-      return this.pos > start;
-    },
-    skipToEnd: function() {this.pos = this.string.length;},
-    skipTo: function(ch) {
-      var found = this.string.indexOf(ch, this.pos);
-      if (found > -1) {this.pos = found; return true;}
-    },
-    backUp: function(n) {this.pos -= n;},
-    column: function() {
-      if (this.lastColumnPos < this.start) {
-        this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
-        this.lastColumnPos = this.start;
-      }
-      return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
-    },
-    indentation: function() {
-      return countColumn(this.string, null, this.tabSize) -
-        (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
-    },
-    match: function(pattern, consume, caseInsensitive) {
-      if (typeof pattern == "string") {
-        var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
-        var substr = this.string.substr(this.pos, pattern.length);
-        if (cased(substr) == cased(pattern)) {
-          if (consume !== false) this.pos += pattern.length;
-          return true;
-        }
-      } else {
-        var match = this.string.slice(this.pos).match(pattern);
-        if (match && match.index > 0) return null;
-        if (match && consume !== false) this.pos += match[0].length;
-        return match;
-      }
-    },
-    current: function(){return this.string.slice(this.start, this.pos);},
-    hideFirstChars: function(n, inner) {
-      this.lineStart += n;
-      try { return inner(); }
-      finally { this.lineStart -= n; }
-    }
-  };
-
-  // TEXTMARKERS
-
-  // Created with markText and setBookmark methods. A TextMarker is a
-  // handle that can be used to clear or find a marked position in the
-  // document. Line objects hold arrays (markedSpans) containing
-  // {from, to, marker} object pointing to such marker objects, and
-  // indicating that such a marker is present on that line. Multiple
-  // lines may point to the same marker when it spans across lines.
-  // The spans will have null for their from/to properties when the
-  // marker continues beyond the start/end of the line. Markers have
-  // links back to the lines they currently touch.
-
-  var nextMarkerId = 0;
-
-  var TextMarker = CodeMirror.TextMarker = function(doc, type) {
-    this.lines = [];
-    this.type = type;
-    this.doc = doc;
-    this.id = ++nextMarkerId;
-  };
-  eventMixin(TextMarker);
-
-  // Clear the marker.
-  TextMarker.prototype.clear = function() {
-    if (this.explicitlyCleared) return;
-    var cm = this.doc.cm, withOp = cm && !cm.curOp;
-    if (withOp) startOperation(cm);
-    if (hasHandler(this, "clear")) {
-      var found = this.find();
-      if (found) signalLater(this, "clear", found.from, found.to);
-    }
-    var min = null, max = null;
-    for (var i = 0; i < this.lines.length; ++i) {
-      var line = this.lines[i];
-      var span = getMarkedSpanFor(line.markedSpans, this);
-      if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text");
-      else if (cm) {
-        if (span.to != null) max = lineNo(line);
-        if (span.from != null) min = lineNo(line);
-      }
-      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
-      if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
-        updateLineHeight(line, textHeight(cm.display));
-    }
-    if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
-      var visual = visualLine(this.lines[i]), len = lineLength(visual);
-      if (len > cm.display.maxLineLength) {
-        cm.display.maxLine = visual;
-        cm.display.maxLineLength = len;
-        cm.display.maxLineChanged = true;
-      }
-    }
-
-    if (min != null && cm && this.collapsed) regChange(cm, min, max + 1);
-    this.lines.length = 0;
-    this.explicitlyCleared = true;
-    if (this.atomic && this.doc.cantEdit) {
-      this.doc.cantEdit = false;
-      if (cm) reCheckSelection(cm.doc);
-    }
-    if (cm) signalLater(cm, "markerCleared", cm, this);
-    if (withOp) endOperation(cm);
-    if (this.parent) this.parent.clear();
-  };
-
-  // Find the position of the marker in the document. Returns a {from,
-  // to} object by default. Side can be passed to get a specific side
-  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
-  // Pos objects returned contain a line object, rather than a line
-  // number (used to prevent looking up the same line twice).
-  TextMarker.prototype.find = function(side, lineObj) {
-    if (side == null && this.type == "bookmark") side = 1;
-    var from, to;
-    for (var i = 0; i < this.lines.length; ++i) {
-      var line = this.lines[i];
-      var span = getMarkedSpanFor(line.markedSpans, this);
-      if (span.from != null) {
-        from = Pos(lineObj ? line : lineNo(line), span.from);
-        if (side == -1) return from;
-      }
-      if (span.to != null) {
-        to = Pos(lineObj ? line : lineNo(line), span.to);
-        if (side == 1) return to;
+    } else {
+      sel.removeAllRanges()
+      sel.addRange(rng)
+    }
+    if (old && sel.anchorNode == null) { sel.addRange(old) }
+    else if (gecko) { this.startGracePeriod() }
+  }
+  this.rememberSelection()
+};
+
+ContentEditableInput.prototype.startGracePeriod = function () {
+    var this$1 = this;
+
+  clearTimeout(this.gracePeriod)
+  this.gracePeriod = setTimeout(function () {
+    this$1.gracePeriod = false
+    if (this$1.selectionChanged())
+      { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }) }
+  }, 20)
+};
+
+ContentEditableInput.prototype.showMultipleSelections = function (info) {
+  removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
+  removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
+};
+
+ContentEditableInput.prototype.rememberSelection = function () {
+  var sel = window.getSelection()
+  this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
+  this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
+};
+
+ContentEditableInput.prototype.selectionInEditor = function () {
+  var sel = window.getSelection()
+  if (!sel.rangeCount) { return false }
+  var node = sel.getRangeAt(0).commonAncestorContainer
+  return contains(this.div, node)
+};
+
+ContentEditableInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor") {
+    if (!this.selectionInEditor())
+      { this.showSelection(this.prepareSelection(), true) }
+    this.div.focus()
+  }
+};
+ContentEditableInput.prototype.blur = function () { this.div.blur() };
+ContentEditableInput.prototype.getField = function () { return this.div };
+
+ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+ContentEditableInput.prototype.receivedFocus = function () {
+  var input = this
+  if (this.selectionInEditor())
+    { this.pollSelection() }
+  else
+    { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }) }
+
+  function poll() {
+    if (input.cm.state.focused) {
+      input.pollSelection()
+      input.polling.set(input.cm.options.pollInterval, poll)
+    }
+  }
+  this.polling.set(this.cm.options.pollInterval, poll)
+};
+
+ContentEditableInput.prototype.selectionChanged = function () {
+  var sel = window.getSelection()
+  return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+    sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+};
+
+ContentEditableInput.prototype.pollSelection = function () {
+  if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+  var sel = window.getSelection(), cm = this.cm
+  // On Android Chrome (version 56, at least), backspacing into an
+  // uneditable block element will put the cursor in that element,
+  // and then, because it's not editable, hide the virtual keyboard.
+  // Because Android doesn't allow us to actually detect backspace
+  // presses in a sane way, this code checks for when that happens
+  // and simulates a backspace press in this case.
+  if (android && chrome && this.cm.options.gutters.length && isInGutter(sel.anchorNode)) {
+    this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs})
+    this.blur()
+    this.focus()
+    return
+  }
+  if (this.composing) { return }
+  this.rememberSelection()
+  var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+  var head = domToPos(cm, sel.focusNode, sel.focusOffset)
+  if (anchor && head) { runInOp(cm, function () {
+    setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
+    if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true }
+  }) }
+};
+
+ContentEditableInput.prototype.pollContent = function () {
+  if (this.readDOMTimeout != null) {
+    clearTimeout(this.readDOMTimeout)
+    this.readDOMTimeout = null
+  }
+
+  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
+  var from = sel.from(), to = sel.to()
+  if (from.ch == 0 && from.line > cm.firstLine())
+    { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length) }
+  if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+    { to = Pos(to.line + 1, 0) }
+  if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+  var fromIndex, fromLine, fromNode
+  if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+    fromLine = lineNo(display.view[0].line)
+    fromNode = display.view[0].node
+  } else {
+    fromLine = lineNo(display.view[fromIndex].line)
+    fromNode = display.view[fromIndex - 1].node.nextSibling
+  }
+  var toIndex = findViewIndex(cm, to.line)
+  var toLine, toNode
+  if (toIndex == display.view.length - 1) {
+    toLine = display.viewTo - 1
+    toNode = display.lineDiv.lastChild
+  } else {
+    toLine = lineNo(display.view[toIndex + 1].line) - 1
+    toNode = display.view[toIndex + 1].node.previousSibling
+  }
+
+  if (!fromNode) { return false }
+  var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
+  var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
+  while (newText.length > 1 && oldText.length > 1) {
+    if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
+    else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
+    else { break }
+  }
+
+  var cutFront = 0, cutEnd = 0
+  var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
+  while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+    { ++cutFront }
+  var newBot = lst(newText), oldBot = lst(oldText)
+  var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                           oldBot.length - (oldText.length == 1 ? cutFront : 0))
+  while (cutEnd < maxCutEnd &&
+         newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+    { ++cutEnd }
+  // Try to move start of change to start of selection if ambiguous
+  if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+    while (cutFront && cutFront > from.ch &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+      cutFront--
+      cutEnd++
+    }
+  }
+
+  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "")
+  newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "")
+
+  var chFrom = Pos(fromLine, cutFront)
+  var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
+  if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+    replaceRange(cm.doc, newText, chFrom, chTo, "+input")
+    return true
+  }
+};
+
+ContentEditableInput.prototype.ensurePolled = function () {
+  this.forceCompositionEnd()
+};
+ContentEditableInput.prototype.reset = function () {
+  this.forceCompositionEnd()
+};
+ContentEditableInput.prototype.forceCompositionEnd = function () {
+  if (!this.composing) { return }
+  clearTimeout(this.readDOMTimeout)
+  this.composing = null
+  this.updateFromDOM()
+  this.div.blur()
+  this.div.focus()
+};
+ContentEditableInput.prototype.readFromDOMSoon = function () {
+    var this$1 = this;
+
+  if (this.readDOMTimeout != null) { return }
+  this.readDOMTimeout = setTimeout(function () {
+    this$1.readDOMTimeout = null
+    if (this$1.composing) {
+      if (this$1.composing.done) { this$1.composing = null }
+      else { return }
+    }
+    this$1.updateFromDOM()
+  }, 80)
+};
+
+ContentEditableInput.prototype.updateFromDOM = function () {
+    var this$1 = this;
+
+  if (this.cm.isReadOnly() || !this.pollContent())
+    { runInOp(this.cm, function () { return regChange(this$1.cm); }) }
+};
+
+ContentEditableInput.prototype.setUneditable = function (node) {
+  node.contentEditable = "false"
+};
+
+ContentEditableInput.prototype.onKeyPress = function (e) {
+  if (e.charCode == 0) { return }
+  e.preventDefault()
+  if (!this.cm.isReadOnly())
+    { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0) }
+};
+
+ContentEditableInput.prototype.readOnlyChanged = function (val) {
+  this.div.contentEditable = String(val != "nocursor")
+};
+
+ContentEditableInput.prototype.onContextMenu = function () {};
+ContentEditableInput.prototype.resetPosition = function () {};
+
+ContentEditableInput.prototype.needsContentAttribute = true
+
+function posToDOM(cm, pos) {
+  var view = findViewForLine(cm, pos.line)
+  if (!view || view.hidden) { return null }
+  var line = getLine(cm.doc, pos.line)
+  var info = mapFromLineView(view, line, pos.line)
+
+  var order = getOrder(line, cm.doc.direction), side = "left"
+  if (order) {
+    var partPos = getBidiPartAt(order, pos.ch)
+    side = partPos % 2 ? "right" : "left"
+  }
+  var result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
+  result.offset = result.collapse == "right" ? result.end : result.start
+  return result
+}
+
+function isInGutter(node) {
+  for (var scan = node; scan; scan = scan.parentNode)
+    { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+  return false
+}
+
+function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+function domTextBetween(cm, from, to, fromLine, toLine) {
+  var text = "", closing = false, lineSep = cm.doc.lineSeparator()
+  function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+  function close() {
+    if (closing) {
+      text += lineSep
+      closing = false
+    }
+  }
+  function addText(str) {
+    if (str) {
+      close()
+      text += str
+    }
+  }
+  function walk(node) {
+    if (node.nodeType == 1) {
+      var cmText = node.getAttribute("cm-text")
+      if (cmText != null) {
+        addText(cmText || node.textContent.replace(/\u200b/g, ""))
+        return
       }
-    }
-    return from && {from: from, to: to};
-  };
-
-  // Signals that the marker's widget changed, and surrounding layout
-  // should be recomputed.
-  TextMarker.prototype.changed = function() {
-    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
-    if (!pos || !cm) return;
-    runInOp(cm, function() {
-      var line = pos.line, lineN = lineNo(pos.line);
-      var view = findViewForLine(cm, lineN);
-      if (view) {
-        clearLineMeasurementCacheFor(view);
-        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
-      }
-      cm.curOp.updateMaxLine = true;
-      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
-        var oldHeight = widget.height;
-        widget.height = null;
-        var dHeight = widgetHeight(widget) - oldHeight;
-        if (dHeight)
-          updateLineHeight(line, line.height + dHeight);
+      var markerID = node.getAttribute("cm-marker"), range
+      if (markerID) {
+        var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
+        if (found.length && (range = found[0].find()))
+          { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)) }
+        return
       }
-    });
-  };
-
-  TextMarker.prototype.attachLine = function(line) {
-    if (!this.lines.length && this.doc.cm) {
-      var op = this.doc.cm.curOp;
-      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
-        (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
-    }
-    this.lines.push(line);
-  };
-  TextMarker.prototype.detachLine = function(line) {
-    this.lines.splice(indexOf(this.lines, line), 1);
-    if (!this.lines.length && this.doc.cm) {
-      var op = this.doc.cm.curOp;
-      (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
-    }
-  };
-
-  // Collapsed markers have unique ids, in order to be able to order
-  // them, which is needed for uniquely determining an outer marker
-  // when they overlap (they may nest, but not partially overlap).
-  var nextMarkerId = 0;
-
-  // Create a marker, wire it up to the right lines, and
-  function markText(doc, from, to, options, type) {
-    // Shared markers (across linked documents) are handled separately
-    // (markTextShared will call out to this again, once per
-    // document).
-    if (options && options.shared) return markTextShared(doc, from, to, options, type);
-    // Ensure we are in an operation.
-    if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
-
-    var marker = new TextMarker(doc, type), diff = cmp(from, to);
-    if (options) copyObj(options, marker, false);
-    // Don't connect empty markers unless clearWhenEmpty is false
-    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
-      return marker;
-    if (marker.replacedWith) {
-      // Showing up as a widget implies collapsed (widget replaces text)
-      marker.collapsed = true;
-      marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget");
-      if (!options.handleMouseEvents) marker.widgetNode.setAttribute("cm-ignore-events", "true");
-      if (options.insertLeft) marker.widgetNode.insertLeft = true;
-    }
-    if (marker.collapsed) {
-      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
-          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
-        throw new Error("Inserting collapsed marker partially overlapping an existing one");
-      sawCollapsedSpans = true;
-    }
-
-    if (marker.addToHistory)
-      addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);
-
-    var curLine = from.line, cm = doc.cm, updateMaxLine;
-    doc.iter(curLine, to.line + 1, function(line) {
-      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
-        updateMaxLine = true;
-      if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
-      addMarkedSpan(line, new MarkedSpan(marker,
-                                         curLine == from.line ? from.ch : null,
-                                         curLine == to.line ? to.ch : null));
-      ++curLine;
-    });
-    // lineIsHidden depends on the presence of the spans, so needs a second pass
-    if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
-      if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
-    });
-
-    if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
-
-    if (marker.readOnly) {
-      sawReadOnlySpans = true;
-      if (doc.history.done.length || doc.history.undone.length)
-        doc.clearHistory();
-    }
-    if (marker.collapsed) {
-      marker.id = ++nextMarkerId;
-      marker.atomic = true;
-    }
-    if (cm) {
-      // Sync editor state
-      if (updateMaxLine) cm.curOp.updateMaxLine = true;
-      if (marker.collapsed)
-        regChange(cm, from.line, to.line + 1);
-      else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
-        for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text");
-      if (marker.atomic) reCheckSelection(cm.doc);
-      signalLater(cm, "markerAdded", cm, marker);
-    }
-    return marker;
-  }
-
-  // SHARED TEXTMARKERS
-
-  // A shared marker spans multiple linked documents. It is
-  // implemented as a meta-marker-object controlling multiple normal
-  // markers.
-  var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary) {
-    this.markers = markers;
-    this.primary = primary;
-    for (var i = 0; i < markers.length; ++i)
-      markers[i].parent = this;
-  };
-  eventMixin(SharedTextMarker);
-
-  SharedTextMarker.prototype.clear = function() {
-    if (this.explicitlyCleared) return;
-    this.explicitlyCleared = true;
-    for (var i = 0; i < this.markers.length; ++i)
-      this.markers[i].clear();
-    signalLater(this, "clear");
-  };
-  SharedTextMarker.prototype.find = function(side, lineObj) {
-    return this.primary.find(side, lineObj);
-  };
-
-  function markTextShared(doc, from, to, options, type) {
-    options = copyObj(options);
-    options.shared = false;
-    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
-    var widget = options.widgetNode;
-    linkedDocs(doc, function(doc) {
-      if (widget) options.widgetNode = widget.cloneNode(true);
-      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
-      for (var i = 0; i < doc.linked.length; ++i)
-        if (doc.linked[i].isParent) return;
-      primary = lst(markers);
-    });
-    return new SharedTextMarker(markers, primary);
-  }
-
-  function findSharedMarkers(doc) {
-    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())),
-                         function(m) { return m.parent; });
-  }
-
-  function copySharedMarkers(doc, markers) {
-    for (var i = 0; i < markers.length; i++) {
-      var marker = markers[i], pos = marker.find();
-      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
-      if (cmp(mFrom, mTo)) {
-        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
-        marker.markers.push(subMark);
-        subMark.parent = marker;
-      }
-    }
-  }
-
-  function detachSharedMarkers(markers) {
-    for (var i = 0; i < markers.length; i++) {
-      var marker = markers[i], linked = [marker.primary.doc];;
-      linkedDocs(marker.primary.doc, function(d) { linked.push(d); });
-      for (var j = 0; j < marker.markers.length; j++) {
-        var subMarker = marker.markers[j];
-        if (indexOf(linked, subMarker.doc) == -1) {
-          subMarker.parent = null;
-          marker.markers.splice(j--, 1);
-        }
-      }
-    }
-  }
-
-  // TEXTMARKER SPANS
-
-  function MarkedSpan(marker, from, to) {
-    this.marker = marker;
-    this.from = from; this.to = to;
-  }
-
-  // Search an array of spans for a span matching the given marker.
-  function getMarkedSpanFor(spans, marker) {
-    if (spans) for (var i = 0; i < spans.length; ++i) {
-      var span = spans[i];
-      if (span.marker == marker) return span;
-    }
-  }
-  // Remove a span from an array, returning undefined if no spans are
-  // left (we don't store arrays for lines without spans).
-  function removeMarkedSpan(spans, span) {
-    for (var r, i = 0; i < spans.length; ++i)
-      if (spans[i] != span) (r || (r = [])).push(spans[i]);
-    return r;
-  }
-  // Add a span to a line.
-  function addMarkedSpan(line, span) {
-    line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
-    span.marker.attachLine(line);
-  }
-
-  // Used for the algorithm that adjusts markers for a change in the
-  // document. These functions cut an array of spans at a given
-  // character position, returning an array of remaining chunks (or
-  // undefined if nothing remains).
-  function markedSpansBefore(old, startCh, isInsert) {
-    if (old) for (var i = 0, nw; i < old.length; ++i) {
-      var span = old[i], marker = span.marker;
-      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
-      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
-        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
-        (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
-      }
-    }
-    return nw;
-  }
-  function markedSpansAfter(old, endCh, isInsert) {
-    if (old) for (var i = 0, nw; i < old.length; ++i) {
-      var span = old[i], marker = span.marker;
-      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
-      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
-        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
-        (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
-                                              span.to == null ? null : span.to - endCh));
-      }
-    }
-    return nw;
-  }
-
-  // Given a change object, compute the new set of marker spans that
-  // cover the line in which the change took place. Removes spans
-  // entirely within the change, reconnects spans belonging to the
-  // same marker that appear on both sides of the change, and cuts off
-  // spans partially within the change. Returns an array of span
-  // arrays with one element for each line in (after) the change.
-  function stretchSpansOverChange(doc, change) {
-    if (change.full) return null;
-    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
-    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
-    if (!oldFirst && !oldLast) return null;
-
-    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
-    // Get the spans that 'stick out' on both sides
-    var first = markedSpansBefore(oldFirst, startCh, isInsert);
-    var last = markedSpansAfter(oldLast, endCh, isInsert);
-
-    // Next, merge those two ends
-    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
-    if (first) {
-      // Fix up .to properties of first
-      for (var i = 0; i < first.length; ++i) {
-        var span = first[i];
-        if (span.to == null) {
-          var found = getMarkedSpanFor(last, span.marker);
-          if (!found) span.to = startCh;
-          else if (sameLine) span.to = found.to == null ? null : found.to + offset;
-        }
-      }
-    }
-    if (last) {
-      // Fix up .from in last (or move them into first in case of sameLine)
-      for (var i = 0; i < last.length; ++i) {
-        var span = last[i];
-        if (span.to != null) span.to += offset;
-        if (span.from == null) {
-          var found = getMarkedSpanFor(first, span.marker);
-          if (!found) {
-            span.from = offset;
-            if (sameLine) (first || (first = [])).push(span);
-          }
-        } else {
-          span.from += offset;
-          if (sameLine) (first || (first = [])).push(span);
+      if (node.getAttribute("contenteditable") == "false") { return }
+      var isBlock = /^(pre|div|p)$/i.test(node.nodeName)
+      if (isBlock) { close() }
+      for (var i = 0; i < node.childNodes.length; i++)
+        { walk(node.childNodes[i]) }
+      if (isBlock) { closing = true }
+    } else if (node.nodeType == 3) {
+      addText(node.nodeValue)
+    }
+  }
+  for (;;) {
+    walk(from)
+    if (from == to) { break }
+    from = from.nextSibling
+  }
+  return text
+}
+
+function domToPos(cm, node, offset) {
+  var lineNode
+  if (node == cm.display.lineDiv) {
+    lineNode = cm.display.lineDiv.childNodes[offset]
+    if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+    node = null; offset = 0
+  } else {
+    for (lineNode = node;; lineNode = lineNode.parentNode) {
+      if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+      if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+    }
+  }
+  for (var i = 0; i < cm.display.view.length; i++) {
+    var lineView = cm.display.view[i]
+    if (lineView.node == lineNode)
+      { return locateNodeInLineView(lineView, node, offset) }
+  }
+}
+
+function locateNodeInLineView(lineView, node, offset) {
+  var wrapper = lineView.text.firstChild, bad = false
+  if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+  if (node == wrapper) {
+    bad = true
+    node = wrapper.childNodes[offset]
+    offset = 0
+    if (!node) {
+      var line = lineView.rest ? lst(lineView.rest) : lineView.line
+      return badPos(Pos(lineNo(line), line.text.length), bad)
+    }
+  }
+
+  var textNode = node.nodeType == 3 ? node : null, topNode = node
+  if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+    textNode = node.firstChild
+    if (offset) { offset = textNode.nodeValue.length }
+  }
+  while (topNode.parentNode != wrapper) { topNode = topNode.parentNode }
+  var measure = lineView.measure, maps = measure.maps
+
+  function find(textNode, topNode, offset) {
+    for (var i = -1; i < (maps ? maps.length : 0); i++) {
+      var map = i < 0 ? measure.map : maps[i]
+      for (var j = 0; j < map.length; j += 3) {
+        var curNode = map[j + 2]
+        if (curNode == textNode || curNode == topNode) {
+          var line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
+          var ch = map[j] + offset
+          if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)] }
+          return Pos(line, ch)
         }
       }
     }
-    // Make sure we didn't create any zero-length spans
-    if (first) first = clearEmptySpans(first);
-    if (last && last != first) last = clearEmptySpans(last);
-
-    var newMarkers = [first];
-    if (!sameLine) {
-      // Fill gap with whole-line-spans
-      var gap = change.text.length - 2, gapMarkers;
-      if (gap > 0 && first)
-        for (var i = 0; i < first.length; ++i)
-          if (first[i].to == null)
-            (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marker, null, null));
-      for (var i = 0; i < gap; ++i)
-        newMarkers.push(gapMarkers);
-      newMarkers.push(last);
-    }
-    return newMarkers;
-  }
-
-  // Remove spans that are empty and don't have a clearWhenEmpty
-  // option of false.
-  function clearEmptySpans(spans) {
-    for (var i = 0; i < spans.length; ++i) {
-      var span = spans[i];
-      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
-        spans.splice(i--, 1);
-    }
-    if (!spans.length) return null;
-    return spans;
-  }
-
-  // Used for un/re-doing changes from the history. Combines the
-  // result of computing the existing spans with the set of spans that
-  // existed in the history (so that deleting around a span and then
-  // undoing brings back the span).
-  function mergeOldSpans(doc, change) {
-    var old = getOldSpans(doc, change);
-    var stretched = stretchSpansOverChange(doc, change);
-    if (!old) return stretched;
-    if (!stretched) return old;
-
-    for (var i = 0; i < old.length; ++i) {
-      var oldCur = old[i], stretchCur = stretched[i];
-      if (oldCur && stretchCur) {
-        spans: for (var j = 0; j < stretchCur.length; ++j) {
-          var span = stretchCur[j];
-          for (var k = 0; k < oldCur.length; ++k)
-            if (oldCur[k].marker == span.marker) continue spans;
-          oldCur.push(span);
-        }
-      } else if (stretchCur) {
-        old[i] = stretchCur;
-      }
-    }
-    return old;
-  }
-
-  // Used to 'clip' out readOnly ranges when making a change.
-  function removeReadOnlyRanges(doc, from, to) {
-    var markers = null;
-    doc.iter(from.line, to.line + 1, function(line) {
-      if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
-        var mark = line.markedSpans[i].marker;
-        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
-          (markers || (markers = [])).push(mark);
-      }
-    });
-    if (!markers) return null;
-    var parts = [{from: from, to: to}];
-    for (var i = 0; i < markers.length; ++i) {
-      var mk = markers[i], m = mk.find(0);
-      for (var j = 0; j < parts.length; ++j) {
-        var p = parts[j];
-        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue;
-        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
-        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
-          newParts.push({from: p.from, to: m.from});
-        if (dto > 0 || !mk.inclusiveRight && !dto)
-          newParts.push({from: m.to, to: p.to});
-        parts.splice.apply(parts, newParts);
-        j += newParts.length - 1;
+  }
+  var found = find(textNode, topNode, offset)
+  if (found) { return badPos(found, bad) }
+
+  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+  for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+    found = find(after, after.firstChild, 0)
+    if (found)
+      { return badPos(Pos(found.line, found.ch - dist), bad) }
+    else
+      { dist += after.textContent.length }
+  }
+  for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+    found = find(before, before.firstChild, -1)
+    if (found)
+      { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+    else
+      { dist$1 += before.textContent.length }
+  }
+}
+
+// TEXTAREA INPUT STYLE
+
+var TextareaInput = function(cm) {
+  this.cm = cm
+  // See input.poll and input.reset
+  this.prevInput = ""
+
+  // Flag that indicates whether we expect input to appear real soon
+  // now (after some event like 'keypress' or 'input') and are
+  // polling intensively.
+  this.pollingFast = false
+  // Self-resetting timeout for the poller
+  this.polling = new Delayed()
+  // Tracks when input.reset has punted to just putting a short
+  // string into the textarea instead of the full selection.
+  this.inaccurateSelection = false
+  // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+  this.hasSelection = false
+  this.composing = null
+};
+
+TextareaInput.prototype.init = function (display) {
+    var this$1 = this;
+
+  var input = this, cm = this.cm
+
+  // Wraps and hides input textarea
+  var div = this.wrapper = hiddenTextarea()
+  // The semihidden textarea that is focused when the editor is
+  // focused, and receives input.
+  var te = this.textarea = div.firstChild
+  display.wrapper.insertBefore(div, display.wrapper.firstChild)
+
+  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+  if (ios) { te.style.width = "0px" }
+
+  on(te, "input", function () {
+    if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null }
+    input.poll()
+  })
+
+  on(te, "paste", function (e) {
+    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+    cm.state.pasteIncoming = true
+    input.fastPoll()
+  })
+
+  function prepareCopyCut(e) {
+    if (signalDOMEvent(cm, e)) { return }
+    if (cm.somethingSelected()) {
+      setLastCopied({lineWise: false, text: cm.getSelections()})
+      if (input.inaccurateSelection) {
+        input.prevInput = ""
+        input.inaccurateSelection = false
+        te.value = lastCopied.text.join("\n")
+        selectInput(te)
       }
-    }
-    return parts;
-  }
-
-  // Connect or disconnect spans from a line.
-  function detachMarkedSpans(line) {
-    var spans = line.markedSpans;
-    if (!spans) return;
-    for (var i = 0; i < spans.length; ++i)
-      spans[i].marker.detachLine(line);
-    line.markedSpans = null;
-  }
-  function attachMarkedSpans(line, spans) {
-    if (!spans) return;
-    for (var i = 0; i < spans.length; ++i)
-      spans[i].marker.attachLine(line);
-    line.markedSpans = spans;
-  }
-
-  // Helpers used when computing which overlapping collapsed span
-  // counts as the larger one.
-  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
-  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
-
-  // Returns a number indicating which of two overlapping collapsed
-  // spans is larger (and thus includes the other). Falls back to
-  // comparing ids when the spans cover exactly the same range.
-  function compareCollapsedMarkers(a, b) {
-    var lenDiff = a.lines.length - b.lines.length;
-    if (lenDiff != 0) return lenDiff;
-    var aPos = a.find(), bPos = b.find();
-    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
-    if (fromCmp) return -fromCmp;
-    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
-    if (toCmp) return toCmp;
-    return b.id - a.id;
-  }
-
-  // Find out whether a line ends or starts in a collapsed span. If
-  // so, return the marker for that span.
-  function collapsedSpanAtSide(line, start) {
-    var sps = sawCollapsedSpans && line.markedSpans, found;
-    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
-      sp = sps[i];
-      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
-          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
-        found = sp.marker;
-    }
-    return found;
-  }
-  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
-  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
-
-  // Test whether there exists a collapsed span that partially
-  // overlaps (covers the start or end, but not both) of a new span.
-  // Such overlap is not allowed.
-  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
-    var line = getLine(doc, lineNo);
-    var sps = sawCollapsedSpans && line.markedSpans;
-    if (sps) for (var i = 0; i < sps.length; ++i) {
-      var sp = sps[i];
-      if (!sp.marker.collapsed) continue;
-      var found = sp.marker.find(0);
-      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
-      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
-      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
-      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
-          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
-        return true;
-    }
-  }
-
-  // A visual line is a line as drawn on the screen. Folding, for
-  // example, can cause multiple logical lines to appear on the same
-  // visual line. This finds the start of the visual line that the
-  // given line is part of (usually that is the line itself).
-  function visualLine(line) {
-    var merged;
-    while (merged = collapsedSpanAtStart(line))
-      line = merged.find(-1, true).line;
-    return line;
-  }
-
-  // Returns an array of logical lines that continue the visual line
-  // started by the argument, or undefined if there are no such lines.
-  function visualLineContinued(line) {
-    var merged, lines;
-    while (merged = collapsedSpanAtEnd(line)) {
-      line = merged.find(1, true).line;
-      (lines || (lines = [])).push(line);
-    }
-    return lines;
-  }
-
-  // Get the line number of the start of the visual line that the
-  // given line number is part of.
-  function visualLineNo(doc, lineN) {
-    var line = getLine(doc, lineN), vis = visualLine(line);
-    if (line == vis) return lineN;
-    return lineNo(vis);
-  }
-  // Get the line number of the start of the next visual line after
-  // the given line.
-  function visualLineEndNo(doc, lineN) {
-    if (lineN > doc.lastLine()) return lineN;
-    var line = getLine(doc, lineN), merged;
-    if (!lineIsHidden(doc, line)) return lineN;
-    while (merged = collapsedSpanAtEnd(line))
-      line = merged.find(1, true).line;
-    return lineNo(line) + 1;
-  }
-
-  // Compute whether a line is hidden. Lines count as hidden when they
-  // are part of a visual line that starts with another line, or when
-  // they are entirely covered by collapsed, non-widget span.
-  function lineIsHidden(doc, line) {
-    var sps = sawCollapsedSpans && line.markedSpans;
-    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
-      sp = sps[i];
-      if (!sp.marker.collapsed) continue;
-      if (sp.from == null) return true;
-      if (sp.marker.widgetNode) continue;
-      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
-        return true;
-    }
-  }
-  function lineIsHiddenInner(doc, line, span) {
-    if (span.to == null) {
-      var end = span.marker.find(1, true);
-      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker));
-    }
-    if (span.marker.inclusiveRight && span.to == line.text.length)
-      return true;
-    for (var sp, i = 0; i < line.markedSpans.length; ++i) {
-      sp = line.markedSpans[i];
-      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
-          (sp.to == null || sp.to != span.from) &&
-          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
-          lineIsHiddenInner(doc, line, sp)) return true;
-    }
-  }
-
-  // LINE WIDGETS
-
-  // Line widgets are block elements displayed above or below a line.
-
-  var LineWidget = CodeMirror.LineWidget = function(doc, node, options) {
-    if (options) for (var opt in options) if (options.hasOwnProperty(opt))
-      this[opt] = options[opt];
-    this.doc = doc;
-    this.node = node;
-  };
-  eventMixin(LineWidget);
-
-  function adjustScrollWhenAboveVisible(cm, line, diff) {
-    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
-      addToScrollPos(cm, null, diff);
-  }
-
-  LineWidget.prototype.clear = function() {
-    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
-    if (no == null || !ws) return;
-    for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
-    if (!ws.length) line.widgets = null;
-    var height = widgetHeight(this);
-    updateLineHeight(line, Math.max(0, line.height - height));
-    if (cm) runInOp(cm, function() {
-      adjustScrollWhenAboveVisible(cm, line, -height);
-      regLineChange(cm, no, "widget");
-    });
-  };
-  LineWidget.prototype.changed = function() {
-    var oldH = this.height, cm = this.doc.cm, line = this.line;
-    this.height = null;
-    var diff = widgetHeight(this) - oldH;
-    if (!diff) return;
-    updateLineHeight(line, line.height + diff);
-    if (cm) runInOp(cm, function() {
-      cm.curOp.forceUpdate = true;
-      adjustScrollWhenAboveVisible(cm, line, diff);
-    });
-  };
-
-  function widgetHeight(widget) {
-    if (widget.height != null) return widget.height;
-    var cm = widget.doc.cm;
-    if (!cm) return 0;
-    if (!contains(document.body, widget.node)) {
-      var parentStyle = "position: relative;";
-      if (widget.coverGutter)
-        parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;";
-      if (widget.noHScroll)
-        parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;";
-      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
-    }
-    return widget.height = widget.node.parentNode.offsetHeight;
-  }
-
-  function addLineWidget(doc, handle, node, options) {
-    var widget = new LineWidget(doc, node, options);
-    var cm = doc.cm;
-    if (cm && widget.noHScroll) cm.display.alignWidgets = true;
-    changeLine(doc, handle, "widget", function(line) {
-      var widgets = line.widgets || (line.widgets = []);
-      if (widget.insertAt == null) widgets.push(widget);
-      else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
-      widget.line = line;
-      if (cm && !lineIsHidden(doc, line)) {
-        var aboveVisible = heightAtLine(line) < doc.scrollTop;
-        updateLineHeight(line, line.height + widgetHeight(widget));
-        if (aboveVisible) addToScrollPos(cm, null, widget.height);
-        cm.curOp.forceUpdate = true;
+    } else if (!cm.options.lineWiseCopyCut) {
+      return
+    } else {
+      var ranges = copyableRanges(cm)
+      setLastCopied({lineWise: true, text: ranges.text})
+      if (e.type == "cut") {
+        cm.setSelections(ranges.ranges, null, sel_dontScroll)
+      } else {
+        input.prevInput = ""
+        te.value = ranges.text.join("\n")
+        selectInput(te)
       }
-      return true;
-    });
-    return widget;
-  }
-
-  // LINE DATA STRUCTURE
-
-  // Line objects. These hold state related to a line, including
-  // highlighting info (the styles array).
-  var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
-    this.text = text;
-    attachMarkedSpans(this, markedSpans);
-    this.height = estimateHeight ? estimateHeight(this) : 1;
-  };
-  eventMixin(Line);
-  Line.prototype.lineNo = function() { return lineNo(this); };
-
-  // Change the content (text, markers) of a line. Automatically
-  // invalidates cached information and tries to re-estimate the
-  // line's height.
-  function updateLine(line, text, markedSpans, estimateHeight) {
-    line.text = text;
-    if (line.stateAfter) line.stateAfter = null;
-    if (line.styles) line.styles = null;
-    if (line.order != null) line.order = null;
-    detachMarkedSpans(line);
-    attachMarkedSpans(line, markedSpans);
-    var estHeight = estimateHeight ? estimateHeight(line) : 1;
-    if (estHeight != line.height) updateLineHeight(line, estHeight);
-  }
-
-  // Detach a line from the document tree and its markers.
-  function cleanUpLine(line) {
-    line.parent = null;
-    detachMarkedSpans(line);
-  }
-
-  function extractLineClasses(type, output) {
-    if (type) for (;;) {
-      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
-      if (!lineClass) break;
-      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
-      var prop = lineClass[1] ? "bgClass" : "textClass";
-      if (output[prop] == null)
-        output[prop] = lineClass[2];
-      else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
-        output[prop] += " " + lineClass[2];
-    }
-    return type;
-  }
-
-  function callBlankLine(mode, state) {
-    if (mode.blankLine) return mode.blankLine(state);
-    if (!mode.innerMode) return;
-    var inner = CodeMirror.innerMode(mode, state);
-    if (inner.mode.blankLine) return inner.mode.blankLine(inner.state);
-  }
-
-  function readToken(mode, stream, state, inner) {
-    for (var i = 0; i < 10; i++) {
-      if (inner) inner[0] = CodeMirror.innerMode(mode, state).mode;
-      var style = mode.token(stream, state);
-      if (stream.pos > stream.start) return style;
-    }
-    throw new Error("Mode " + mode.name + " failed to advance stream.");
-  }
-
-  // Utility for getTokenAt and getLineTokens
-  function takeToken(cm, pos, precise, asArray) {
-    function getObj(copy) {
-      return {start: stream.start, end: stream.pos,
-              string: stream.current(),
-              type: style || null,
-              state: copy ? copyState(doc.mode, state) : state};
-    }
-
-    var doc = cm.doc, mode = doc.mode, style;
-    pos = clipPos(doc, pos);
-    var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise);
-    var stream = new StringStream(line.text, cm.options.tabSize), tokens;
-    if (asArray) tokens = [];
-    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
-      stream.start = stream.pos;
-      style = readToken(mode, stream, state);
-      if (asArray) tokens.push(getObj(true));
-    }
-    return asArray ? tokens : getObj();
-  }
-
-  // Run the given mode's parser over a line, calling f for each token.
-  function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {
-    var flattenSpans = mode.flattenSpans;
-    if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
-    var curStart = 0, curStyle = null;
-    var stream = new StringStream(text, cm.options.tabSize), style;
-    var inner = cm.options.addModeClass && [null];
-    if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses);
-    while (!stream.eol()) {
-      if (stream.pos > cm.options.maxHighlightLength) {
-        flattenSpans = false;
-        if (forceToEnd) processLine(cm, text, state, stream.pos);
-        stream.pos = text.length;
-        style = null;
-      } else {
-        style = extractLineClasses(readToken(mode, stream, state, inner), lineClasses);
-      }
-      if (inner) {
-        var mName = inner[0].name;
-        if (mName) style = "m-" + (style ? mName + " " + style : mName);
-      }
-      if (!flattenSpans || curStyle != style) {
-        while (curStart < stream.start) {
-          curStart = Math.min(stream.start, curStart + 50000);
-          f(curStart, curStyle);
-        }
-        curStyle = style;
-      }
-      stream.start = stream.pos;
-    }
-    while (curStart < stream.pos) {
-      // Webkit seems to refuse to render text nodes longer than 57444 characters
-      var pos = Math.min(stream.pos, curStart + 50000);
-      f(pos, curStyle);
-      curStart = pos;
-    }
-  }
-
-  // Compute a style array (an array starting with a mode generation
-  // -- for invalidation -- followed by pairs of end positions and
-  // style strings), which is used to highlight the tokens on the
-  // line.
-  function highlightLine(cm, line, state, forceToEnd) {
-    // A styles array always starts with a number identifying the
-    // mode/overlays that it is based on (for easy invalidation).
-    var st = [cm.state.modeGen], lineClasses = {};
-    // Compute the base array of styles
-    runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
-      st.push(end, style);
-    }, lineClasses, forceToEnd);
-
-    // Run overlays, adjust style array.
-    for (var o = 0; o < cm.state.overlays.length; ++o) {
-      var overlay = cm.state.overlays[o], i = 1, at = 0;
-      runMode(cm, line.text, overlay.mode, true, function(end, style) {
-        var start = i;
-        // Ensure there's a token end at the current position, and that i points at it
-        while (at < end) {
-          var i_end = st[i];
-          if (i_end > end)
-            st.splice(i, 1, end, st[i+1], i_end);
-          i += 2;
-          at = Math.min(end, i_end);
-        }
-        if (!style) return;
-        if (overlay.opaque) {
-          st.splice(start, i - start, end, "cm-overlay " + style);
-          i = start + 2;
+    }
+    if (e.type == "cut") { cm.state.cutIncoming = true }
+  }
+  on(te, "cut", prepareCopyCut)
+  on(te, "copy", prepareCopyCut)
+
+  on(display.scroller, "paste", function (e) {
+    if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+    cm.state.pasteIncoming = true
+    input.focus()
+  })
+
+  // Prevent normal selection in the editor (we handle our own)
+  on(display.lineSpace, "selectstart", function (e) {
+    if (!eventInWidget(display, e)) { e_preventDefault(e) }
+  })
+
+  on(te, "compositionstart", function () {
+    var start = cm.getCursor("from")
+    if (input.composing) { input.composing.range.clear() }
+    input.composing = {
+      start: start,
+      range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+    }
+  })
+  on(te, "compositionend", function () {
+    if (input.composing) {
+      input.poll()
+      input.composing.range.clear()
+      input.composing = null
+    }
+  })
+};
+
+TextareaInput.prototype.prepareSelection = function () {
+  // Redraw the selection and/or cursor
+  var cm = this.cm, display = cm.display, doc = cm.doc
+  var result = prepareSelection(cm)
+
+  // Move the hidden textarea near the cursor to prevent scrolling artifacts
+  if (cm.options.moveInputWithCursor) {
+    var headPos = cursorCoords(cm, doc.sel.primary().head, "div")
+    var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
+    result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                        headPos.top + lineOff.top - wrapOff.top))
+    result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                         headPos.left + lineOff.left - wrapOff.left))
+  }
+
+  return result
+};
+
+TextareaInput.prototype.showSelection = function (drawn) {
+  var cm = this.cm, display = cm.display
+  removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
+  removeChildrenAndAdd(display.selectionDiv, drawn.selection)
+  if (drawn.teTop != null) {
+    this.wrapper.style.top = drawn.teTop + "px"
+    this.wrapper.style.left = drawn.teLeft + "px"
+  }
+};
+
+// Reset the input to correspond to the selection (or to be empty,
+// when not typing and nothing is selected)
+TextareaInput.prototype.reset = function (typing) {
+  if (this.contextMenuPending || this.composing) { return }
+  var minimal, selected, cm = this.cm, doc = cm.doc
+  if (cm.somethingSelected()) {
+    this.prevInput = ""
+    var range = doc.sel.primary()
+    minimal = hasCopyEvent &&
+      (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000)
+    var content = minimal ? "-" : selected || cm.getSelection()
+    this.textarea.value = content
+    if (cm.state.focused) { selectInput(this.textarea) }
+    if (ie && ie_version >= 9) { this.hasSelection = content }
+  } else if (!typing) {
+    this.prevInput = this.textarea.value = ""
+    if (ie && ie_version >= 9) { this.hasSelection = null }
+  }
+  this.inaccurateSelection = minimal
+};
+
+TextareaInput.prototype.getField = function () { return this.textarea };
+
+TextareaInput.prototype.supportsTouch = function () { return false };
+
+TextareaInput.prototype.focus = function () {
+  if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+    try { this.textarea.focus() }
+    catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+  }
+};
+
+TextareaInput.prototype.blur = function () { this.textarea.blur() };
+
+TextareaInput.prototype.resetPosition = function () {
+  this.wrapper.style.top = this.wrapper.style.left = 0
+};
+
+TextareaInput.prototype.receivedFocus = function () { this.slowPoll() };
+
+// Poll for input changes, using the normal rate of polling. This
+// runs as long as the editor is focused.
+TextareaInput.prototype.slowPoll = function () {
+    var this$1 = this;
+
+  if (this.pollingFast) { return }
+  this.polling.set(this.cm.options.pollInterval, function () {
+    this$1.poll()
+    if (this$1.cm.state.focused) { this$1.slowPoll() }
+  })
+};
+
+// When an event has just come in that is likely to add or change
+// something in the input textarea, we poll faster, to ensure that
+// the change appears on the screen quickly.
+TextareaInput.prototype.fastPoll = function () {
+  var missed = false, input = this
+  input.pollingFast = true
+  function p() {
+    var changed = input.poll()
+    if (!changed && !missed) {missed = true; input.polling.set(60, p)}
+    else {input.pollingFast = false; input.slowPoll()}
+  }
+  input.polling.set(20, p)
+};
+
+// Read input from the textarea, and update the document to match.
+// When something is selected, it is present in the textarea, and
+// selected (unless it is huge, in which case a placeholder is
+// used). When nothing is selected, the cursor sits after previously
+// seen text (can be empty), which is stored in prevInput (we must
+// not reset the textarea when typing, because that breaks IME).
+TextareaInput.prototype.poll = function () {
+    var this$1 = this;
+
+  var cm = this.cm, input = this.textarea, prevInput = this.prevInput
+  // Since this is called a *lot*, try to bail out as cheaply as
+  // possible when it is clear that nothing happened. hasSelection
+  // will be the case when there is a lot of text in the textarea,
+  // in which case reading its value would be expensive.
+  if (this.contextMenuPending || !cm.state.focused ||
+      (hasSelection(input) && !prevInput && !this.composing) ||
+      cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+    { return false }
+
+  var text = input.value
+  // If nothing changed, bail.
+  if (text == prevInput && !cm.somethingSelected()) { return false }
+  // Work around nonsensical selection resetting in IE9/10, and
+  // inexplicable appearance of private area unicode characters on
+  // some key combos in Mac (#2689).
+  if (ie && ie_version >= 9 && this.hasSelection === text ||
+      mac && /[\uf700-\uf7ff]/.test(text)) {
+    cm.display.input.reset()
+    return false
+  }
+
+  if (cm.doc.sel == cm.display.selForContextMenu) {
+    var first = text.charCodeAt(0)
+    if (first == 0x200b && !prevInput) { prevInput = "\u200b" }
+    if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+  }
+  // Find the part of the input that is actually new
+  var same = 0, l = Math.min(prevInput.length, text.length)
+  while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same }
+
+  runInOp(cm, function () {
+    applyTextInput(cm, text.slice(same), prevInput.length - same,
+                   null, this$1.composing ? "*compose" : null)
+
+    // Don't leave long text in the textarea, since it makes further polling slow
+    if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = "" }
+    else { this$1.prevInput = text }
+
+    if (this$1.composing) {
+      this$1.composing.range.clear()
+      this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+                                         {className: "CodeMirror-composing"})
+    }
+  })
+  return true
+};
+
+TextareaInput.prototype.ensurePolled = function () {
+  if (this.pollingFast && this.poll()) { this.pollingFast = false }
+};
+
+TextareaInput.prototype.onKeyPress = function () {
+  if (ie && ie_version >= 9) { this.hasSelection = null }
+  this.fastPoll()
+};
+
+TextareaInput.prototype.onContextMenu = function (e) {
+  var input = this, cm = input.cm, display = cm.display, te = input.textarea
+  var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop
+  if (!pos || presto) { return } // Opera is difficult.
+
+  // Reset the current text selection only if the click is done outside of the selection
+  // and 'resetSelectionOnContextMenu' option is true.
+  var reset = cm.options.resetSelectionOnContextMenu
+  if (reset && cm.doc.sel.contains(pos) == -1)
+    { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll) }
+
+  var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText
+  input.wrapper.style.cssText = "position: absolute"
+  var wrapperBox = input.wrapper.getBoundingClientRect()
+  te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);"
+  var oldScrollY
+  if (webkit) { oldScrollY = window.scrollY } // Work around Chrome issue (#2712)
+  display.input.focus()
+  if (webkit) { window.scrollTo(null, oldScrollY) }
+  display.input.reset()
+  // Adds "Select all" to context menu in FF
+  if (!cm.somethingSelected()) { te.value = input.prevInput = " " }
+  input.contextMenuPending = true
+  display.selForContextMenu = cm.doc.sel
+  clearTimeout(display.detectingSelectAll)
+
+  // Select-all will be greyed out if there's nothing to select, so
+  // this adds a zero-width space so that we can later check whether
+  // it got selected.
+  function prepareSelectAllHack() {
+    if (te.selectionStart != null) {
+      var selected = cm.somethingSelected()
+      var extval = "\u200b" + (selected ? te.value : "")
+      te.value = "\u21da" // Used to catch context-menu undo
+      te.value = extval
+      input.prevInput = selected ? "" : "\u200b"
+      te.selectionStart = 1; te.selectionEnd = extval.length
+      // Re-set this, in case some other handler touched the
+      // selection in the meantime.
+      display.selForContextMenu = cm.doc.sel
+    }
+  }
+  function rehide() {
+    input.contextMenuPending = false
+    input.wrapper.style.cssText = oldWrapperCSS
+    te.style.cssText = oldCSS
+    if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos) }
+
+    // Try to detect the user choosing select-all
+    if (te.selectionStart != null) {
+      if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack() }
+      var i = 0, poll = function () {
+        if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+            te.selectionEnd > 0 && input.prevInput == "\u200b") {
+          operation(cm, selectAll)(cm)
+        } else if (i++ < 10) {
+          display.detectingSelectAll = setTimeout(poll, 500)
         } else {
-          for (; start < i; start += 2) {
-            var cur = st[start+1];
-            st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style;
-          }
-        }
-      }, lineClasses);
-    }
-
-    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null};
-  }
-
-  function getLineStyles(cm, line, updateFrontier) {
-    if (!line.styles || line.styles[0] != cm.state.modeGen) {
-      var state = getStateBefore(cm, lineNo(line));
-      var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state);
-      line.stateAfter = state;
-      line.styles = result.styles;
-      if (result.classes) line.styleClasses = result.classes;
-      else if (line.styleClasses) line.styleClasses = null;
-      if (updateFrontier === cm.doc.frontier) cm.doc.frontier++;
-    }
-    return line.styles;
-  }
-
-  // Lightweight form of highlight -- proceed over this line and
-  // update state, but don't save a style array. Used for lines that
-  // aren't currently visible.
-  function processLine(cm, text, state, startAt) {
-    var mode = cm.doc.mode;
-    var stream = new StringStream(text, cm.options.tabSize);
-    stream.start = stream.pos = startAt || 0;
-    if (text == "") callBlankLine(mode, state);
-    while (!stream.eol()) {
-      readToken(mode, stream, state);
-      stream.start = stream.pos;
-    }
-  }
-
-  // Convert a style as returned by a mode (either null, or a string
-  // containing one or more styles) to a CSS style. This is cached,
-  // and also looks for line-wide styles.
-  var styleToClassCache = {}, styleToClassCacheWithMode = {};
-  function interpretTokenStyle(style, options) {
-    if (!style || /^\s*$/.test(style)) return null;
-    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
-    return cache[style] ||
-      (cache[style] = style.replace(/\S+/g, "cm-$&"));
-  }
-
-  // Render the DOM representation of the text of a line. Also builds
-  // up a 'line map', which points at the DOM nodes that represent
-  // specific stretches of text, and is used by the measuring code.
-  // The returned object contains the DOM node, this map, and
-  // information about line-wide styles that were set by the mode.
-  function buildLineContent(cm, lineView) {
-    // The padding-right forces the element to have a 'border', which
-    // is needed on Webkit to be able to get line-level bounding
-    // rectangles for it (in measureChar).
-    var content = elt("span", null, null, webkit ? "padding-right: .1px" : null);
-    var builder = {pre: elt("pre", [content], "CodeMirror-line"), content: content,
-                   col: 0, pos: 0, cm: cm,
-                   splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
-    lineView.measure = {};
-
-    // Iterate over the logical lines that make up this visual line.
-    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
-      var line = i ? lineView.rest[i - 1] : lineView.line, order;
-      builder.pos = 0;
-      builder.addToken = buildToken;
-      // Optionally wire in some hacks into the token-rendering
-      // algorithm, to deal with browser quirks.
-      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
-        builder.addToken = buildTokenBadBidi(builder.addToken, order);
-      builder.map = [];
-      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
-      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
-      if (line.styleClasses) {
-        if (line.styleClasses.bgClass)
-          builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "");
-        if (line.styleClasses.textClass)
-          builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "");
-      }
-
-      // Ensure at least a single node is present, for measuring.
-      if (builder.map.length == 0)
-        builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure)));
-
-      // Store the map and a cache object for the current logical line
-      if (i == 0) {
-        lineView.measure.map = builder.map;
-        lineView.measure.cache = {};
-      } else {
-        (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map);
-        (lineView.measure.caches || (lineView.measure.caches = [])).push({});
-      }
-    }
-
-    // See issue #2901
-    if (webkit) {
-      var last = builder.content.lastChild
-      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
-        builder.content.className = "cm-tab-wrap-hack";
-    }
-
-    signal(cm, "renderLine", cm, lineView.line, builder.pre);
-    if (builder.pre.className)
-      builder.textClass = joinClasses(builder.pre.className, builder.textClass || "");
-
-    return builder;
-  }
-
-  function defaultSpecialCharPlaceholder(ch) {
-    var token = elt("span", "\u2022", "cm-invalidchar");
-    token.title = "\\u" + ch.charCodeAt(0).toString(16);
-    token.setAttribute("aria-label", token.title);
-    return token;
-  }
-
-  // Build up the DOM representation for a single token, and add it to
-  // the line map. Takes care to render special characters separately.
-  function buildToken(builder, text, style, startStyle, endStyle, title, css) {
-    if (!text) return;
-    var displayText = builder.splitSpaces ? text.replace(/ {3,}/g, splitSpaces) : text;
-    var special = builder.cm.state.specialChars, mustWrap = false;
-    if (!special.test(text)) {
-      builder.col += text.length;
-      var content = document.createTextNode(displayText);
-      builder.map.push(builder.pos, builder.pos + text.length, content);
-      if (ie && ie_version < 9) mustWrap = true;
-      builder.pos += text.length;
-    } else {
-      var content = document.createDocumentFragment(), pos = 0;
-      while (true) {
-        special.lastIndex = pos;
-        var m = special.exec(text);
-        var skipped = m ? m.index - pos : text.length - pos;
-        if (skipped) {
-          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
-          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
-          else content.appendChild(txt);
-          builder.map.push(builder.pos, builder.pos + skipped, txt);
-          builder.col += skipped;
-          builder.pos += skipped;
-        }
-        if (!m) break;
-        pos += skipped + 1;
-        if (m[0] == "\t") {
-          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
-          var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
-          txt.setAttribute("role", "presentation");
-          txt.setAttribute("cm-text", "\t");
-          builder.col += tabWidth;
-        } else if (m[0] == "\r" || m[0] == "\n") {
-          var txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
-          txt.setAttribute("cm-text", m[0]);
-          builder.col += 1;
-        } else {
-          var txt = builder.cm.options.specialCharPlaceholder(m[0]);
-          txt.setAttribute("cm-text", m[0]);
-          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
-          else content.appendChild(txt);
-          builder.col += 1;
-        }
-        builder.map.push(builder.pos, builder.pos + 1, txt);
-        builder.pos++;
-      }
-    }
-    if (style || startStyle || endStyle || mustWrap || css) {
-      var fullStyle = style || "";
-      if (startStyle) fullStyle += startStyle;
-      if (endStyle) fullStyle += endStyle;
-      var token = elt("span", [content], fullStyle, css);
-      if (title) token.title = title;
-      return builder.content.appendChild(token);
-    }
-    builder.content.appendChild(content);
-  }
-
-  function splitSpaces(old) {
-    var out = " ";
-    for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
-    out += " ";
-    return out;
-  }
-
-  // Work around nonsense dimensions being reported for stretches of
-  // right-to-left text.
-  function buildTokenBadBidi(inner, order) {
-    return function(builder, text, style, startStyle, endStyle, title, css) {
-      style = style ? style + " cm-force-border" : "cm-force-border";
-      var start = builder.pos, end = start + text.length;
-      for (;;) {
-        // Find the part that overlaps with the start of this text
-        for (var i = 0; i < order.length; i++) {
-          var part = order[i];
-          if (part.to > start && part.from <= start) break;
-        }
-        if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, title, css);
-        inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css);
-        startStyle = null;
-        text = text.slice(part.to - start);
-        start = part.to;
-      }
-    };
-  }
-
-  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
-    var widget = !ignoreWidget && marker.widgetNode;
-    if (widget) builder.map.push(builder.pos, builder.pos + size, widget);
-    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
-      if (!widget)
-        widget = builder.content.appendChild(document.createElement("span"));
-      widget.setAttribute("cm-marker", marker.id);
-    }
-    if (widget) {
-      builder.cm.display.input.setUneditable(widget);
-      builder.content.appendChild(widget);
-    }
-    builder.pos += size;
-  }
-
-  // Outputs a number of spans to make up a line, taking highlighting
-  // and marked text into account.
-  function insertLineContent(line, builder, styles) {
-    var spans = line.markedSpans, allText = line.text, at = 0;
-    if (!spans) {
-      for (var i = 1; i < styles.length; i+=2)
-        builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options));
-      return;
-    }
-
-    var len = allText.length, pos = 0, i = 1, text = "", style, css;
-    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
-    for (;;) {
-      if (nextChange == pos) { // Update current marker set
-        spanStyle = spanEndStyle = spanStartStyle = title = css = "";
-        collapsed = null; nextChange = Infinity;
-        var foundBookmarks = [], endStyles
-        for (var j = 0; j < spans.length; ++j) {
-          var sp = spans[j], m = sp.marker;
-          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
-            foundBookmarks.push(m);
-          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
-            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
-              nextChange = sp.to;
-              spanEndStyle = "";
-            }
-            if (m.className) spanStyle += " " + m.className;
-            if (m.css) css = (css ? css + ";" : "") + m.css;
-            if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
-            if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to)
-            if (m.title && !title) title = m.title;
-            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
-              collapsed = sp;
-          } else if (sp.from > pos && nextChange > sp.from) {
-            nextChange = sp.from;
-          }
-        }
-        if (endStyles) for (var j = 0; j < endStyles.length; j += 2)
-          if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j]
-
-        if (!collapsed || collapsed.from == pos) for (var j = 0; j < foundBookmarks.length; ++j)
-          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
-        if (collapsed && (collapsed.from || 0) == pos) {
-          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
-                             collapsed.marker, collapsed.from == null);
-          if (collapsed.to == null) return;
-          if (collapsed.to == pos) collapsed = false;
+          display.selForContextMenu = null
+          display.input.reset()
         }
       }
-      if (pos >= len) break;
-
-      var upto = Math.min(len, nextChange);
-      while (true) {
-        if (text) {
-          var end = pos + text.length;
-          if (!collapsed) {
-            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
-            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
-                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
-          }
-          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
-          pos = end;
-          spanStartStyle = "";
-        }
-        text = allText.slice(at, at = styles[i++]);
-        style = interpretTokenStyle(styles[i++], builder.cm.options);
-      }
-    }
-  }
-
-  // DOCUMENT DATA STRUCTURE
-
-  // By default, updates that start and end at the beginning of a line
-  // are treated specially, in order to make the association of line
-  // widgets and marker elements with the text behave more intuitive.
-  function isWholeLineUpdate(doc, change) {
-    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
-      (!doc.cm || doc.cm.options.wholeLineUpdateBefore);
-  }
-
-  // Perform a change on the document data structure.
-  function updateDoc(doc, change, markedSpans, estimateHeight) {
-    function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
-    function update(line, text, spans) {
-      updateLine(line, text, spans, estimateHeight);
-      signalLater(line, "change", line, change);
-    }
-    function linesFor(start, end) {
-      for (var i = start, result = []; i < end; ++i)
-        result.push(new Line(text[i], spansFor(i), estimateHeight));
-      return result;
-    }
-
-    var from = change.from, to = change.to, text = change.text;
-    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
-    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
-
-    // Adjust the line structure
-    if (change.full) {
-      doc.insert(0, linesFor(0, text.length));
-      doc.remove(text.length, doc.size - text.length);
-    } else if (isWholeLineUpdate(doc, change)) {
-      // This is a whole-line replace. Treated specially to make
-      // sure line objects move the way they are supposed to.
-      var added = linesFor(0, text.length - 1);
-      update(lastLine, lastLine.text, lastSpans);
-      if (nlines) doc.remove(from.line, nlines);
-      if (added.length) doc.insert(from.line, added);
-    } else if (firstLine == lastLine) {
-      if (text.length == 1) {
-        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
-      } else {
-        var added = linesFor(1, text.length - 1);
-        added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
-        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-        doc.insert(from.line + 1, added);
-      }
-    } else if (text.length == 1) {
-      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
-      doc.remove(from.line + 1, nlines);
-    } else {
-      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
-      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
-      var added = linesFor(1, text.length - 1);
-      if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
-      doc.insert(from.line + 1, added);
-    }
-
-    signalLater(doc, "change", doc, change);
-  }
-
-  // The document is represented as a BTree consisting of leaves, with
-  // chunk of lines in them, and branches, with up to ten leaves or
-  // other branch nodes below them. The top node is always a branch
-  // node, and is the document object itself (meaning it has
-  // additional methods and properties).
-  //
-  // All nodes have parent links. The tree is used both to go from
-  // line numbers to line objects, and to go from objects to numbers.
-  // It also indexes by height, and is used to convert between height
-  // and line object, and to find the total height of the document.
-  //
-  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
-
-  function LeafChunk(lines) {
-    this.lines = lines;
-    this.parent = null;
-    for (var i = 0, height = 0; i < lines.length; ++i) {
-      lines[i].parent = this;
-      height += lines[i].height;
-    }
-    this.height = height;
-  }
-
-  LeafChunk.prototype = {
-    chunkSize: function() { return this.lines.length; },
-    // Remove the n lines at offset 'at'.
-    removeInner: function(at, n) {
-      for (var i = at, e = at + n; i < e; ++i) {
-        var line = this.lines[i];
-        this.height -= line.height;
-        cleanUpLine(line);
-        signalLater(line, "delete");
-      }
-      this.lines.splice(at, n);
-    },
-    // Helper used to collapse a small branch into a single leaf.
-    collapse: function(lines) {
-      lines.push.apply(lines, this.lines);
-    },
-    // Insert the given array of lines at offset 'at', count them as
-    // having the given height.
-    insertInner: function(at, lines, height) {
-      this.height += height;
-      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
-      for (var i = 0; i < lines.length; ++i) lines[i].parent = this;
-    },
-    // Used to iterate over a part of the tree.
-    iterN: function(at, n, op) {
-      for (var e = at + n; at < e; ++at)
-        if (op(this.lines[at])) return true;
-    }
-  };
-
-  function BranchChunk(children) {
-    this.children = children;
-    var size = 0, height = 0;
-    for (var i = 0; i < children.length; ++i) {
-      var ch = children[i];
-      size += ch.chunkSize(); height += ch.height;
-      ch.parent = this;
-    }
-    this.size = size;
-    this.height = height;
-    this.parent = null;
-  }
-
-  BranchChunk.prototype = {
-    chunkSize: function() { return this.size; },
-    removeInner: function(at, n) {
-      this.size -= n;
-      for (var i = 0; i < this.children.length; ++i) {
-        var child = this.children[i], sz = child.chunkSize();
-        if (at < sz) {
-          var rm = Math.min(n, sz - at), oldHeight = child.height;
-          child.removeInner(at, rm);
-          this.height -= oldHeight - child.height;
-          if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
-          if ((n -= rm) == 0) break;
-          at = 0;
-        } else at -= sz;
-      }
-      // If the result is smaller than 25 lines, ensure that it is a
-      // single leaf node.
-      if (this.size - n < 25 &&
-          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
-        var lines = [];
-        this.collapse(lines);
-        this.children = [new LeafChunk(lines)];
-        this.children[0].parent = this;
-      }
-    },
-    collapse: function(lines) {
-      for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(lines);
-    },
-    insertInner: function(at, lines, height) {
-      this.size += lines.length;
-      this.height += height;
-      for (var i = 0; i < this.children.length; ++i) {
-        var child = this.children[i], sz = child.chunkSize();
-        if (at <= sz) {
-          child.insertInner(at, lines, height);
-          if (child.lines && child.lines.length > 50) {
-            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
-            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
-            var remaining = child.lines.length % 25 + 25
-            for (var pos = remaining; pos < child.lines.length;) {
-              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
-              child.height -= leaf.height;
-              this.children.splice(++i, 0, leaf);
-              leaf.parent = this;
-            }
-            child.lines = child.lines.slice(0, remaining);
-            this.maybeSpill();
-          }
-          break;
-        }
-        at -= sz;
-      }
-    },
-    // When a node has grown, check whether it should be split.
-    maybeSpill: function() {
-      if (this.children.length <= 10) return;
-      var me = this;
-      do {
-        var spilled = me.children.splice(me.children.length - 5, 5);
-        var sibling = new BranchChunk(spilled);
-        if (!me.parent) { // Become the parent node
-          var copy = new BranchChunk(me.children);
-          copy.parent = me;
-          me.children = [copy, sibling];
-          me = copy;
-       } else {
-          me.size -= sibling.size;
-          me.height -= sibling.height;
-          var myIndex = indexOf(me.parent.children, me);
-          me.parent.children.splice(myIndex + 1, 0, sibling);
+      display.detectingSelectAll = setTimeout(poll, 200)
+    }
+  }
+
+  if (ie && ie_version >= 9) { prepareSelectAllHack() }
+  if (captureRightClick) {
+    e_stop(e)
+    var mouseup = function () {
+      off(window, "mouseup", mouseup)
+      setTimeout(rehide, 20)
+    }
+    on(window, "mouseup", mouseup)
+  } else {
+    setTimeout(rehide, 50)
+  }
+};
+
+TextareaInput.prototype.readOnlyChanged = function (val) {
+  if (!val) { this.reset() }
+  this.textarea.disabled = val == "nocursor"
+};
+
+TextareaInput.prototype.setUneditable = function () {};
+
+TextareaInput.prototype.needsContentAttribute = false
+
+function fromTextArea(textarea, options) {
+  options = options ? copyObj(options) : {}
+  options.value = textarea.value
+  if (!options.tabindex && textarea.tabIndex)
+    { options.tabindex = textarea.tabIndex }
+  if (!options.placeholder && textarea.placeholder)
+    { options.placeholder = textarea.placeholder }
+  // Set autofocus to true if this textarea is focused, or if it has
+  // autofocus and no other element is focused.
+  if (options.autofocus == null) {
+    var hasFocus = activeElt()
+    options.autofocus = hasFocus == textarea ||
+      textarea.getAttribute("autofocus") != null && hasFocus == document.body
+  }
+
+  function save() {textarea.value = cm.getValue()}
+
+  var realSubmit
+  if (textarea.form) {
+    on(textarea.form, "submit", save)
+    // Deplorable hack to make the submit method do the right thing.
+    if (!options.leaveSubmitMethodAlone) {
+      var form = textarea.form
+      realSubmit = form.submit
+      try {
+        var wrappedSubmit = form.submit = function () {
+          save()
+          form.submit = realSubmit
+          form.submit()
+          form.submit = wrappedSubmit
         }
-        sibling.parent = me.parent;
-      } while (me.children.length > 10);
-      me.parent.maybeSpill();
-    },
-    iterN: function(at, n, op) {
-      for (var i = 0; i < this.children.length; ++i) {
-        var child = this.children[i], sz = child.chunkSize();
-        if (at < sz) {
-          var used = Math.min(n, sz - at);
-          if (child.iterN(at, used, op)) return true;
-          if ((n -= used) == 0) break;
-          at = 0;
-        } else at -= sz;
-      }
-    }
-  };
-
-  var nextDocId = 0;
-  var Doc = CodeMirror.Doc = function(text, mode, firstLine, lineSep) {
-    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep);
-    if (firstLine == null) firstLine = 0;
-
-    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
-    this.first = firstLine;
-    this.scrollTop = this.scrollLeft = 0;
-    this.cantEdit = false;
-    this.cleanGeneration = 1;
-    this.frontier = firstLine;
-    var start = Pos(firstLine, 0);
-    this.sel = simpleSelection(start);
-    this.history = new History(null);
-    this.id = ++nextDocId;
-    this.modeOption = mode;
-    this.lineSep = lineSep;
-    this.extend = false;
-
-    if (typeof text == "string") text = this.splitLines(text);
-    updateDoc(this, {from: start, to: start, text: text});
-    setSelection(this, simpleSelection(start), sel_dontScroll);
-  };
-
-  Doc.prototype = createObj(BranchChunk.prototype, {
-    constructor: Doc,
-    // Iterate over the document. Supports two forms -- with only one
-    // argument, it calls that for each line in the document. With
-    // three, it iterates over the range given by the first two (with
-    // the second being non-inclusive).
-    iter: function(from, to, op) {
-      if (op) this.iterN(from - this.first, to - from, op);
-      else this.iterN(this.first, this.first + this.size, from);
-    },
-
-    // Non-public interface for adding and removing lines.
-    insert: function(at, lines) {
-      var height = 0;
-      for (var i = 0; i < lines.length; ++i) height += lines[i].height;
-      this.insertInner(at - this.first, lines, height);
-    },
-    remove: function(at, n) { this.removeInner(at - this.first, n); },
-
-    // From here, the methods are part of the public interface. Most
-    // are also available from CodeMirror (editor) instances.
-
-    getValue: function(lineSep) {
-      var lines = getLines(this, this.first, this.first + this.size);
-      if (lineSep === false) return lines;
-      return lines.join(lineSep || this.lineSeparator());
-    },
-    setValue: docMethodOp(function(code) {
-      var top = Pos(this.first, 0), last = this.first + this.size - 1;
-      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
-                        text: this.splitLines(code), origin: "setValue", full: true}, true);
-      setSelection(this, simpleSelection(top));
-    }),
-    replaceRange: function(code, from, to, origin) {
-      from = clipPos(this, from);
-      to = to ? clipPos(this, to) : from;
-      replaceRange(this, code, from, to, origin);
-    },
-    getRange: function(from, to, lineSep) {
-      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
-      if (lineSep === false) return lines;
-      return lines.join(lineSep || this.lineSeparator());
-    },
-
-    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
-
-    getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
-    getLineNumber: function(line) {return lineNo(line);},
-
-    getLineHandleVisualStart: function(line) {
-      if (typeof line == "number") line = getLine(this, line);
-      return visualLine(line);
-    },
-
-    lineCount: function() {return this.size;},
-    firstLine: function() {return this.first;},
-    lastLine: function() {return this.first + this.size - 1;},
-
-    clipPos: function(pos) {return clipPos(this, pos);},
-
-    getCursor: function(start) {
-      var range = this.sel.primary(), pos;
-      if (start == null || start == "head") pos = range.head;
-      else if (start == "anchor") pos = range.anchor;
-      else if (start == "end" || start == "to" || start === false) pos = range.to();
-      else pos = range.from();
-      return pos;
-    },
-    listSelections: function() { return this.sel.ranges; },
-    somethingSelected: function() {return this.sel.somethingSelected();},
-
-    setCursor: docMethodOp(function(line, ch, options) {
-      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
-    }),
-    setSelection: docMethodOp(function(anchor, head, options) {
-      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
-    }),
-    extendSelection: docMethodOp(function(head, other, options) {
-      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
-    }),
-    extendSelections: docMethodOp(function(heads, options) {
-      extendSelections(this, clipPosArray(this, heads), options);
-    }),
-    extendSelectionsBy: docMethodOp(function(f, options) {
-      var heads = map(this.sel.ranges, f);
-      extendSelections(this, clipPosArray(this, heads), options);
-    }),
-    setSelections: docMethodOp(function(ranges, primary, options) {
-      if (!ranges.length) return;
-      for (var i = 0, out = []; i < ranges.length; i++)
-        out[i] = new Range(clipPos(this, ranges[i].anchor),
-                           clipPos(this, ranges[i].head));
-      if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex);
-      setSelection(this, normalizeSelection(out, primary), options);
-    }),
-    addSelection: docMethodOp(function(anchor, head, options) {
-      var ranges = this.sel.ranges.slice(0);
-      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
-      setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
-    }),
-
-    getSelection: function(lineSep) {
-      var ranges = this.sel.ranges, lines;
-      for (var i = 0; i < ranges.length; i++) {
-        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
-        lines = lines ? lines.concat(sel) : sel;
-      }
-      if (lineSep === false) return lines;
-      else return lines.join(lineSep || this.lineSeparator());
-    },
-    getSelections: function(lineSep) {
-      var parts = [], ranges = this.sel.ranges;
-      for (var i = 0; i < ranges.length; i++) {
-        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
-        if (lineSep !== false) sel = sel.join(lineSep || this.lineSeparator());
-        parts[i] = sel;
-      }
-      return parts;
-    },
-    replaceSelection: function(code, collapse, origin) {
-      var dup = [];
-      for (var i = 0; i < this.sel.ranges.length; i++)
-        dup[i] = code;
-      this.replaceSelections(dup, collapse, origin || "+input");
-    },
-    replaceSelections: docMethodOp(function(code, collapse, origin) {
-      var changes = [], sel = this.sel;
-      for (var i = 0; i < sel.ranges.length; i++) {
-        var range = sel.ranges[i];
-        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
-      }
-      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
-      for (var i = changes.length - 1; i >= 0; i--)
-        makeChange(this, changes[i]);
-      if (newSel) setSelectionReplaceHistory(this, newSel);
-      else if (this.cm) ensureCursorVisible(this.cm);
-    }),
-    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
-    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
-    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
-    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
-
-    setExtending: function(val) {this.extend = val;},
-    getExtending: function() {return this.extend;},
-
-    historySize: function() {
-      var hist = this.history, done = 0, undone = 0;
-      for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done;
-      for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone;
-      return {undo: done, redo: undone};
-    },
-    clearHistory: function() {this.history = new History(this.history.maxGeneration);},
-
-    markClean: function() {
-      this.cleanGeneration = this.changeGeneration(true);
-    },
-    changeGeneration: function(forceSplit) {
-      if (forceSplit)
-        this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null;
-      return this.history.generation;
-    },
-    isClean: function (gen) {
-      return this.history.generation == (gen || this.cleanGeneration);
-    },
-
-    getHistory: function() {
-      return {done: copyHistoryArray(this.history.done),
-              undone: copyHistoryArray(this.history.undone)};
-    },
-    setHistory: function(histData) {
-      var hist = this.history = new History(this.history.maxGeneration);
-      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
-      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
-    },
-
-    addLineClass: docMethodOp(function(handle, where, cls) {
-      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
-        var prop = where == "text" ? "textClass"
-                 : where == "background" ? "bgClass"
-                 : where == "gutter" ? "gutterClass" : "wrapClass";
-        if (!line[prop]) line[prop] = cls;
-        else if (classTest(cls).test(line[prop])) return false;
-        else line[prop] += " " + cls;
-        return true;
-      });
-    }),
-    removeLineClass: docMethodOp(function(handle, where, cls) {
-      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
-        var prop = where == "text" ? "textClass"
-                 : where == "background" ? "bgClass"
-                 : where == "gutter" ? "gutterClass" : "wrapClass";
-        var cur = line[prop];
-        if (!cur) return false;
-        else if (cls == null) line[prop] = null;
-        else {
-          var found = cur.match(classTest(cls));
-          if (!found) return false;
-          var end = found.index + found[0].length;
-          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
-        }
-        return true;
-      });
-    }),
-
-    addLineWidget: docMethodOp(function(handle, node, options) {
-      return addLineWidget(this, handle, node, options);
-    }),
-    removeLineWidget: function(widget) { widget.clear(); },
-
-    markText: function(from, to, options) {
-      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range");
-    },
-    setBookmark: function(pos, options) {
-      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
-                      insertLeft: options && options.insertLeft,
-                      clearWhenEmpty: false, shared: options && options.shared,
-                      handleMouseEvents: options && options.handleMouseEvents};
-      pos = clipPos(this, pos);
-      return markText(this, pos, pos, realOpts, "bookmark");
-    },
-    findMarksAt: function(pos) {
-      pos = clipPos(this, pos);
-      var markers = [], spans = getLine(this, pos.line).markedSpans;
-      if (spans) for (var i = 0; i < spans.length; ++i) {
-        var span = spans[i];
-        if ((span.from == null || span.from <= pos.ch) &&
-            (span.to == null || span.to >= pos.ch))
-          markers.push(span.marker.parent || span.marker);
-      }
-      return markers;
-    },
-    findMarks: function(from, to, filter) {
-      from = clipPos(this, from); to = clipPos(this, to);
-      var found = [], lineNo = from.line;
-      this.iter(from.line, to.line + 1, function(line) {
-        var spans = line.markedSpans;
-        if (spans) for (var i = 0; i < spans.length; i++) {
-          var span = spans[i];
-          if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
-                span.from == null && lineNo != from.line ||
-                span.from != null && lineNo == to.line && span.from >= to.ch) &&
-              (!filter || filter(span.marker)))
-            found.push(span.marker.parent || span.marker);
-        }
-        ++lineNo;
-      });
-      return found;
-    },
-    getAllMarks: function() {
-      var markers = [];
-      this.iter(function(line) {
-        var sps = line.markedSpans;
-        if (sps) for (var i = 0; i < sps.length; ++i)
-          if (sps[i].from != null) markers.push(sps[i].marker);
-      });
-      return markers;
-    },
-
-    posFromIndex: function(off) {
-      var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
-      this.iter(function(line) {
-        var sz = line.text.length + sepSize;
-        if (sz > off) { ch = off; return true; }
-        off -= sz;
-        ++lineNo;
-      });
-      return clipPos(this, Pos(lineNo, ch));
-    },
-    indexFromPos: function (coords) {
-      coords = clipPos(this, coords);
-      var index = coords.ch;
-      if (coords.line < this.first || coords.ch < 0) return 0;
-      var sepSize = this.lineSeparator().length;
-      this.iter(this.first, coords.line, function (line) {
-        index += line.text.length + sepSize;
-      });
-      return index;
-    },
-
-    copy: function(copyHistory) {
-      var doc = new Doc(getLines(this, this.first, this.first + this.size),
-                        this.modeOption, this.first, this.lineSep);
-      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
-      doc.sel = this.sel;
-      doc.extend = false;
-      if (copyHistory) {
-        doc.history.undoDepth = this.history.undoDepth;
-        doc.setHistory(this.getHistory());
-      }
-      return doc;
-    },
-
-    linkedDoc: function(options) {
-      if (!options) options = {};
-      var from = this.first, to = this.first + this.size;
-      if (options.from != null && options.from > from) from = options.from;
-      if (options.to != null && options.to < to) to = options.to;
-      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep);
-      if (options.sharedHist) copy.history = this.history;
-      (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
-      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
-      copySharedMarkers(copy, findSharedMarkers(this));
-      return copy;
-    },
-    unlinkDoc: function(other) {
-      if (other instanceof CodeMirror) other = other.doc;
-      if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
-        var link = this.linked[i];
-        if (link.doc != other) continue;
-        this.linked.splice(i, 1);
-        other.unlinkDoc(this);
-        detachSharedMarkers(findSharedMarkers(this));
-        break;
-      }
-      // If the histories were shared, split them again
-      if (other.history == this.history) {
-        var splitIds = [other.id];
-        linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
-        other.history = new History(null);
-        other.history.done = copyHistoryArray(this.history.done, splitIds);
-        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
-      }
-    },
-    iterLinkedDocs: function(f) {linkedDocs(this, f);},
-
-    getMode: function() {return this.mode;},
-    getEditor: function() {return this.cm;},
-
-    splitLines: function(str) {
-      if (this.lineSep) return str.split(this.lineSep);
-      return splitLinesAuto(str);
-    },
-    lineSeparator: function() { return this.lineSep || "\n"; }
-  });
-
-  // Public alias.
-  Doc.prototype.eachLine = Doc.prototype.iter;
-
-  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
-  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
-  for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
-    CodeMirror.prototype[prop] = (function(method) {
-      return function() {return method.apply(this.doc, arguments);};
-    })(Doc.prototype[prop]);
-
-  eventMixin(Doc);
-
-  // Call f for all linked documents.
-  function linkedDocs(doc, f, sharedHistOnly) {
-    function propagate(doc, skip, sharedHist) {
-      if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
-        var rel = doc.linked[i];
-        if (rel.doc == skip) continue;
-        var shared = sharedHist && rel.sharedHist;
-        if (sharedHistOnly && !shared) continue;
-        f(rel.doc, shared);
-        propagate(rel.doc, doc, shared);
-      }
-    }
-    propagate(doc, null, true);
-  }
-
-  // Attach a document to an editor.
-  function attachDoc(cm, doc) {
-    if (doc.cm) throw new Error("This document is already in use.");
-    cm.doc = doc;
-    doc.cm = cm;
-    estimateLineHeights(cm);
-    loadMode(cm);
-    if (!cm.options.lineWrapping) findMaxLine(cm);
-    cm.options.mode = doc.modeOption;
-    regChange(cm);
-  }
-
-  // LINE UTILITIES
-
-  // Find the line object corresponding to the given line number.
-  function getLine(doc, n) {
-    n -= doc.first;
-    if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.first) + " in the document.");
-    for (var chunk = doc; !chunk.lines;) {
-      for (var i = 0;; ++i) {
-        var child = chunk.children[i], sz = child.chunkSize();
-        if (n < sz) { chunk = child; break; }
-        n -= sz;
-      }
-    }
-    return chunk.lines[n];
-  }
-
-  // Get the part of a document between two positions, as an array of
-  // strings.
-  function getBetween(doc, start, end) {
-    var out = [], n = start.line;
-    doc.iter(start.line, end.line + 1, function(line) {
-      var text = line.text;
-      if (n == end.line) text = text.slice(0, end.ch);
-      if (n == start.line) text = text.slice(start.ch);
-      out.push(text);
-      ++n;
-    });
-    return out;
-  }
-  // Get the lines between from and to, as array of strings.
-  function getLines(doc, from, to) {
-    var out = [];
-    doc.iter(from, to, function(line) { out.push(line.text); });
-    return out;
-  }
-
-  // Update the height of a line, propagating the height change
-  // upwards to parent nodes.
-  function updateLineHeight(line, height) {
-    var diff = height - line.height;
-    if (diff) for (var n = line; n; n = n.parent) n.height += diff;
-  }
-
-  // Given a line object, find its line number by walking up through
-  // its parent links.
-  function lineNo(line) {
-    if (line.parent == null) return null;
-    var cur = line.parent, no = indexOf(cur.lines, line);
-    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
-      for (var i = 0;; ++i) {
-        if (chunk.children[i] == cur) break;
-        no += chunk.children[i].chunkSize();
-      }
-    }
-    return no + cur.first;
-  }
-
-  // Find the line at the given vertical position, using the height
-  // information in the document tree.
-  function lineAtHeight(chunk, h) {
-    var n = chunk.first;
-    outer: do {
-      for (var i = 0; i < chunk.children.length; ++i) {
-        var child = chunk.children[i], ch = child.height;
-        if (h < ch) { chunk = child; continue outer; }
-        h -= ch;
-        n += child.chunkSize();
-      }
-      return n;
-    } while (!chunk.lines);
-    for (var i = 0; i < chunk.lines.length; ++i) {
-      var line = chunk.lines[i], lh = line.height;
-      if (h < lh) break;
-      h -= lh;
-    }
-    return n + i;
-  }
-
-
-  // Find the height above the given line.
-  function heightAtLine(lineObj) {
-    lineObj = visualLine(lineObj);
-
-    var h = 0, chunk = lineObj.parent;
-    for (var i = 0; i < chunk.lines.length; ++i) {
-      var line = chunk.lines[i];
-      if (line == lineObj) break;
-      else h += line.height;
-    }
-    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
-      for (var i = 0; i < p.children.length; ++i) {
-        var cur = p.children[i];
-        if (cur == chunk) break;
-        else h += cur.height;
-      }
-    }
-    return h;
-  }
-
-  // Get the bidi ordering for the given line (and cache it). Returns
-  // false for lines that are fully left-to-right, and an array of
-  // BidiSpan objects otherwise.
-  function getOrder(line) {
-    var order = line.order;
-    if (order == null) order = line.order = bidiOrdering(line.text);
-    return order;
-  }
-
-  // HISTORY
-
-  function History(startGen) {
-    // Arrays of change events and selections. Doing something adds an
-    // event to done and clears undo. Undoing moves events from done
-    // to undone, redoing moves them in the other direction.
-    this.done = []; this.undone = [];
-    this.undoDepth = Infinity;
-    // Used to track when changes can be merged into a single undo
-    // event
-    this.lastModTime = this.lastSelTime = 0;
-    this.lastOp = this.lastSelOp = null;
-    this.lastOrigin = this.lastSelOrigin = null;
-    // Used by the isClean() method
-    this.generation = this.maxGeneration = startGen || 1;
-  }
-
-  // Create a history change event from an updateDoc-style change
-  // object.
-  function historyChangeFromChange(doc, change) {
-    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
-    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
-    linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
-    return histChange;
-  }
-
-  // Pop all selection events off the end of a history array. Stop at
-  // a change event.
-  function clearSelectionEvents(array) {
-    while (array.length) {
-      var last = lst(array);
-      if (last.ranges) array.pop();
-      else break;
-    }
-  }
-
-  // Find the top change event in the history. Pop off selection
-  // events that are in the way.
-  function lastChangeEvent(hist, force) {
-    if (force) {
-      clearSelectionEvents(hist.done);
-      return lst(hist.done);
-    } else if (hist.done.length && !lst(hist.done).ranges) {
-      return lst(hist.done);
-    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
-      hist.done.pop();
-      return lst(hist.done);
-    }
-  }
-
-  // Register a change in the history. Merges changes that are within
-  // a single operation, ore are close together with an origin that
-  // allows merging (starting with "+") into a single event.
-  function addChangeToHistory(doc, change, selAfter, opId) {
-    var hist = doc.history;
-    hist.undone.length = 0;
-    var time = +new Date, cur;
-
-    if ((hist.lastOp == opId ||
-         hist.lastOrigin == change.origin && change.origin &&
-         ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
-          change.origin.charAt(0) == "*")) &&
-        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
-      // Merge this change into the last event
-      var last = lst(cur.changes);
-      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
-        // Optimized case for simple insertion -- don't want to add
-        // new changesets for every character typed
-        last.to = changeEnd(change);
-      } else {
-        // Add new sub-event
-        cur.changes.push(historyChangeFromChange(doc, change));
-      }
-    } else {
-      // Can not be merged, start a new event.
-      var before = lst(hist.done);
-      if (!before || !before.ranges)
-        pushSelectionToHistory(doc.sel, hist.done);
-      cur = {changes: [historyChangeFromChange(doc, change)],
-             generation: hist.generation};
-      hist.done.push(cur);
-      while (hist.done.length > hist.undoDepth) {
-        hist.done.shift();
-        if (!hist.done[0].ranges) hist.done.shift();
+      } catch(e) {}
+    }
+  }
+
+  options.finishInit = function (cm) {
+    cm.save = save
+    cm.getTextArea = function () { return textarea; }
+    cm.toTextArea = function () {
+      cm.toTextArea = isNaN // Prevent this from being ran twice
+      save()
+      textarea.parentNode.removeChild(cm.getWrapperElement())
+      textarea.style.display = ""
+      if (textarea.form) {
+        off(textarea.form, "submit", save)
+        if (typeof textarea.form.submit == "function")
+          { textarea.form.submit = realSubmit }
       }
     }
-    hist.done.push(selAfter);
-    hist.generation = ++hist.maxGeneration;
-    hist.lastModTime = hist.lastSelTime = time;
-    hist.lastOp = hist.lastSelOp = opId;
-    hist.lastOrigin = hist.lastSelOrigin = change.origin;
-
-    if (!last) signal(doc, "historyAdded");
-  }
-
-  function selectionEventCanBeMerged(doc, origin, prev, sel) {
-    var ch = origin.charAt(0);
-    return ch == "*" ||
-      ch == "+" &&
-      prev.ranges.length == sel.ranges.length &&
-      prev.somethingSelected() == sel.somethingSelected() &&
-      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500);
-  }
-
-  // Called whenever the selection changes, sets the new selection as
-  // the pending selection in the history, and pushes the old pending
-  // selection into the 'done' array when it was significantly
-  // different (in number of selected ranges, emptiness, or time).
-  function addSelectionToHistory(doc, sel, opId, options) {
-    var hist = doc.history, origin = options && options.origin;
-
-    // A new event is started when the previous origin does not match
-    // the current, or the origins don't allow matching. Origins
-    // starting with * are always merged, those starting with + are
-    // merged when similar and close together in time.
-    if (opId == hist.lastSelOp ||
-        (origin && hist.lastSelOrigin == origin &&
-         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
-          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
-      hist.done[hist.done.length - 1] = sel;
-    else
-      pushSelectionToHistory(sel, hist.done);
-
-    hist.lastSelTime = +new Date;
-    hist.lastSelOrigin = origin;
-    hist.lastSelOp = opId;
-    if (options && options.clearRedo !== false)
-      clearSelectionEvents(hist.undone);
-  }
-
-  function pushSelectionToHistory(sel, dest) {
-    var top = lst(dest);
-    if (!(top && top.ranges && top.equals(sel)))
-      dest.push(sel);
-  }
-
-  // Used to store marked span information in the history.
-  function attachLocalSpans(doc, change, from, to) {
-    var existing = change["spans_" + doc.id], n = 0;
-    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
-      if (line.markedSpans)
-        (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
-      ++n;
-    });
-  }
-
-  // When un/re-doing restores text containing marked spans, those
-  // that have been explicitly cleared should not be restored.
-  function removeClearedSpans(spans) {
-    if (!spans) return null;
-    for (var i = 0, out; i < spans.length; ++i) {
-      if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
-      else if (out) out.push(spans[i]);
-    }
-    return !out ? spans : out.length ? out : null;
-  }
-
-  // Retrieve and filter the old marked spans stored in a change event.
-  function getOldSpans(doc, change) {
-    var found = change["spans_" + doc.id];
-    if (!found) return null;
-    for (var i = 0, nw = []; i < change.text.length; ++i)
-      nw.push(removeClearedSpans(found[i]));
-    return nw;
-  }
-
-  // Used both to provide a JSON-safe object in .getHistory, and, when
-  // detaching a document, to split the history in two
-  function copyHistoryArray(events, newGroup, instantiateSel) {
-    for (var i = 0, copy = []; i < events.length; ++i) {
-      var event = events[i];
-      if (event.ranges) {
-        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
-        continue;
-      }
-      var changes = event.changes, newChanges = [];
-      copy.push({changes: newChanges});
-      for (var j = 0; j < changes.length; ++j) {
-        var change = changes[j], m;
-        newChanges.push({from: change.from, to: change.to, text: change.text});
-        if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
-          if (indexOf(newGroup, Number(m[1])) > -1) {
-            lst(newChanges)[prop] = change[prop];
-            delete change[prop];
-          }
-        }
-      }
-    }
-    return copy;
-  }
-
-  // Rebasing/resetting history to deal with externally-sourced changes
-
-  function rebaseHistSelSingle(pos, from, to, diff) {
-    if (to < pos.line) {
-      pos.line += diff;
-    } else if (from < pos.line) {
-      pos.line = from;
-      pos.ch = 0;
-    }
-  }
-
-  // Tries to rebase an array of history events given a change in the
-  // document. If the change touches the same lines as the event, the
-  // event, and everything 'behind' it, is discarded. If the change is
-  // before the event, the event's positions are updated. Uses a
-  // copy-on-write scheme for the positions, to avoid having to
-  // reallocate them all on every rebase, but also avoid problems with
-  // shared position objects being unsafely updated.
-  function rebaseHistArray(array, from, to, diff) {
-    for (var i = 0; i < array.length; ++i) {
-      var sub = array[i], ok = true;
-      if (sub.ranges) {
-        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
-        for (var j = 0; j < sub.ranges.length; j++) {
-          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
-          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
-        }
-        continue;
-      }
-      for (var j = 0; j < sub.changes.length; ++j) {
-        var cur = sub.changes[j];
-        if (to < cur.from.line) {
-          cur.from = Pos(cur.from.line + diff, cur.from.ch);
-          cur.to = Pos(cur.to.line + diff, cur.to.ch);
-        } else if (from <= cur.to.line) {
-          ok = false;
-          break;
-        }
-      }
-      if (!ok) {
-        array.splice(0, i + 1);
-        i = 0;
-      }
-    }
-  }
-
-  function rebaseHist(hist, change) {
-    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
-    rebaseHistArray(hist.done, from, to, diff);
-    rebaseHistArray(hist.undone, from, to, diff);
-  }
-
-  // EVENT UTILITIES
-
-  // Due to the fact that we still support jurassic IE versions, some
-  // compatibility wrappers are needed.
-
-  var e_preventDefault = CodeMirror.e_preventDefault = function(e) {
-    if (e.preventDefault) e.preventDefault();
-    else e.returnValue = false;
-  };
-  var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) {
-    if (e.stopPropagation) e.stopPropagation();
-    else e.cancelBubble = true;
-  };
-  function e_defaultPrevented(e) {
-    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
-  }
-  var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropagation(e);};
-
-  function e_target(e) {return e.target || e.srcElement;}
-  function e_button(e) {
-    var b = e.which;
-    if (b == null) {
-      if (e.button & 1) b = 1;
-      else if (e.button & 2) b = 3;
-      else if (e.button & 4) b = 2;
-    }
-    if (mac && e.ctrlKey && b == 1) b = 3;
-    return b;
-  }
-
-  // EVENT HANDLING
-
-  // Lightweight event framework. on/off also work on DOM nodes,
-  // registering native DOM handlers.
-
-  var on = CodeMirror.on = function(emitter, type, f) {
-    if (emitter.addEventListener)
-      emitter.addEventListener(type, f, false);
-    else if (emitter.attachEvent)
-      emitter.attachEvent("on" + type, f);
-    else {
-      var map = emitter._handlers || (emitter._handlers = {});
-      var arr = map[type] || (map[type] = []);
-      arr.push(f);
-    }
-  };
-
-  var noHandlers = []
-  function getHandlers(emitter, type, copy) {
-    var arr = emitter._handlers && emitter._handlers[type]
-    if (copy) return arr && arr.length > 0 ? arr.slice() : noHandlers
-    else return arr || noHandlers
-  }
-
-  var off = CodeMirror.off = function(emitter, type, f) {
-    if (emitter.removeEventListener)
-      emitter.removeEventListener(type, f, false);
-    else if (emitter.detachEvent)
-      emitter.detachEvent("on" + type, f);
-    else {
-      var handlers = getHandlers(emitter, type, false)
-      for (var i = 0; i < handlers.length; ++i)
-        if (handlers[i] == f) { handlers.splice(i, 1); break; }
-    }
-  };
-
-  var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
-    var handlers = getHandlers(emitter, type, true)
-    if (!handlers.length) return;
-    var args = Array.prototype.slice.call(arguments, 2);
-    for (var i = 0; i < handlers.length; ++i) handlers[i].apply(null, args);
-  };
-
-  var orphanDelayedCallbacks = null;
-
-  // Often, we want to signal events at a point where we are in the
-  // middle of some work, but don't want the handler to start calling
-  // other methods on the editor, which might be in an inconsistent
-  // state or simply not expect any other events to happen.
-  // signalLater looks whether there are any handlers, and schedules
-  // them to be executed when the last operation ends, or, if no
-  // operation is active, when a timeout fires.
-  function signalLater(emitter, type /*, values...*/) {
-    var arr = getHandlers(emitter, type, false)
-    if (!arr.length) return;
-    var args = Array.prototype.slice.call(arguments, 2), list;
-    if (operationGroup) {
-      list = operationGroup.delayedCallbacks;
-    } else if (orphanDelayedCallbacks) {
-      list = orphanDelayedCallbacks;
-    } else {
-      list = orphanDelayedCallbacks = [];
-      setTimeout(fireOrphanDelayed, 0);
-    }
-    function bnd(f) {return function(){f.apply(null, args);};};
-    for (var i = 0; i < arr.length; ++i)
-      list.push(bnd(arr[i]));
-  }
-
-  function fireOrphanDelayed() {
-    var delayed = orphanDelayedCallbacks;
-    orphanDelayedCallbacks = null;
-    for (var i = 0; i < delayed.length; ++i) delayed[i]();
-  }
-
-  // The DOM events that CodeMirror handles can be overridden by
-  // registering a (non-DOM) handler on the editor for the event name,
-  // and preventDefault-ing the event in that handler.
-  function signalDOMEvent(cm, e, override) {
-    if (typeof e == "string")
-      e = {type: e, preventDefault: function() { this.defaultPrevented = true; }};
-    signal(cm, override || e.type, cm, e);
-    return e_defaultPrevented(e) || e.codemirrorIgnore;
-  }
-
-  function signalCursorActivity(cm) {
-    var arr = cm._handlers && cm._handlers.cursorActivity;
-    if (!arr) return;
-    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
-    for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1)
-      set.push(arr[i]);
-  }
-
-  function hasHandler(emitter, type) {
-    return getHandlers(emitter, type).length > 0
-  }
-
-  // Add on and off methods to a constructor's prototype, to make
-  // registering events on such objects more convenient.
-  function eventMixin(ctor) {
-    ctor.prototype.on = function(type, f) {on(this, type, f);};
-    ctor.prototype.off = function(type, f) {off(this, type, f);};
-  }
-
-  // MISC UTILITIES
-
-  // Number of pixels added to scroller and sizer to hide scrollbar
-  var scrollerGap = 30;
-
-  // Returned or thrown by various protocols to signal 'I'm not
-  // handling this'.
-  var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
-
-  // Reused option objects for setSelection & friends
-  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
-
-  function Delayed() {this.id = null;}
-  Delayed.prototype.set = function(ms, f) {
-    clearTimeout(this.id);
-    this.id = setTimeout(f, ms);
-  };
-
-  // Counts the column offset in a string, taking tabs into account.
-  // Used mostly to find indentation.
-  var countColumn = CodeMirror.countColumn = function(string, end, tabSize, startIndex, startValue) {
-    if (end == null) {
-      end = string.search(/[^\s\u00a0]/);
-      if (end == -1) end = string.length;
-    }
-    for (var i = startIndex || 0, n = startValue || 0;;) {
-      var nextTab = string.indexOf("\t", i);
-      if (nextTab < 0 || nextTab >= end)
-        return n + (end - i);
-      n += nextTab - i;
-      n += tabSize - (n % tabSize);
-      i = nextTab + 1;
-    }
-  };
-
-  // The inverse of countColumn -- find the offset that corresponds to
-  // a particular column.
-  var findColumn = CodeMirror.findColumn = function(string, goal, tabSize) {
-    for (var pos = 0, col = 0;;) {
-      var nextTab = string.indexOf("\t", pos);
-      if (nextTab == -1) nextTab = string.length;
-      var skipped = nextTab - pos;
-      if (nextTab == string.length || col + skipped >= goal)
-        return pos + Math.min(skipped, goal - col);
-      col += nextTab - pos;
-      col += tabSize - (col % tabSize);
-      pos = nextTab + 1;
-      if (col >= goal) return pos;
-    }
-  }
-
-  var spaceStrs = [""];
-  function spaceStr(n) {
-    while (spaceStrs.length <= n)
-      spaceStrs.push(lst(spaceStrs) + " ");
-    return spaceStrs[n];
-  }
-
-  function lst(arr) { return arr[arr.length-1]; }
-
-  var selectInput = function(node) { node.select(); };
-  if (ios) // Mobile Safari apparently has a bug where select() is broken.
-    selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; };
-  else if (ie) // Suppress mysterious IE10 errors
-    selectInput = function(node) { try { node.select(); } catch(_e) {} };
-
-  function indexOf(array, elt) {
-    for (var i = 0; i < array.length; ++i)
-      if (array[i] == elt) return i;
-    return -1;
-  }
-  function map(array, f) {
-    var out = [];
-    for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
-    return out;
-  }
-
-  function nothing() {}
-
-  function createObj(base, props) {
-    var inst;
-    if (Object.create) {
-      inst = Object.create(base);
-    } else {
-      nothing.prototype = base;
-      inst = new nothing();
-    }
-    if (props) copyObj(props, inst);
-    return inst;
-  };
-
-  function copyObj(obj, target, overwrite) {
-    if (!target) target = {};
-    for (var prop in obj)
-      if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
-        target[prop] = obj[prop];
-    return target;
-  }
-
-  function bind(f) {
-    var args = Array.prototype.slice.call(arguments, 1);
-    return function(){return f.apply(null, args);};
-  }
-
-  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
-  var isWordCharBasic = CodeMirror.isWordChar = function(ch) {
-    return /\w/.test(ch) || ch > "\x80" &&
-      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
-  };
-  function isWordChar(ch, helper) {
-    if (!helper) return isWordCharBasic(ch);
-    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) return true;
-    return helper.test(ch);
-  }
-
-  function isEmpty(obj) {
-    for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
-    return true;
-  }
-
-  // Extending unicode characters. A series of a non-extending char +
-  // any number of extending chars is treated as a single unit as far
-  // as editing and measuring is concerned. This is not fully correct,
-  // since some scripts/fonts/browsers also treat other configurations
-  // of code points as a group.
-  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
-  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }
-
-  // DOM UTILITIES
-
-  function elt(tag, content, className, style) {
-    var e = document.createElement(tag);
-    if (className) e.className = className;
-    if (style) e.style.cssText = style;
-    if (typeof content == "string") e.appendChild(document.createTextNode(content));
-    else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
-    return e;
-  }
-
-  var range;
-  if (document.createRange) range = function(node, start, end, endNode) {
-    var r = document.createRange();
-    r.setEnd(endNode || node, end);
-    r.setStart(node, start);
-    return r;
-  };
-  else range = function(node, start, end) {
-    var r = document.body.createTextRange();
-    try { r.moveToElementText(node.parentNode); }
-    catch(e) { return r; }
-    r.collapse(true);
-    r.moveEnd("character", end);
-    r.moveStart("character", start);
-    return r;
-  };
-
-  function removeChildren(e) {
-    for (var count = e.childNodes.length; count > 0; --count)
-      e.removeChild(e.firstChild);
-    return e;
-  }
-
-  function removeChildrenAndAdd(parent, e) {
-    return removeChildren(parent).appendChild(e);
-  }
-
-  var contains = CodeMirror.contains = function(parent, child) {
-    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
-      child = child.parentNode;
-    if (parent.contains)
-      return parent.contains(child);
-    do {
-      if (child.nodeType == 11) child = child.host;
-      if (child == parent) return true;
-    } while (child = child.parentNode);
-  };
-
-  function activeElt() {
-    var activeElement = document.activeElement;
-    while (activeElement && activeElement.root && activeElement.root.activeElement)
-      activeElement = activeElement.root.activeElement;
-    return activeElement;
-  }
-  // Older versions of IE throws unspecified error when touching
-  // document.activeElement in some cases (during loading, in iframe)
-  if (ie && ie_version < 11) activeElt = function() {
-    try { return document.activeElement; }
-    catch(e) { return document.body; }
-  };
-
-  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*"); }
-  var rmClass = CodeMirror.rmClass = function(node, cls) {
-    var current = node.className;
-    var match = classTest(cls).exec(current);
-    if (match) {
-      var after = current.slice(match.index + match[0].length);
-      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
-    }
-  };
-  var addClass = CodeMirror.addClass = function(node, cls) {
-    var current = node.className;
-    if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls;
-  };
-  function joinClasses(a, b) {
-    var as = a.split(" ");
-    for (var i = 0; i < as.length; i++)
-      if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i];
-    return b;
-  }
-
-  // WINDOW-WIDE EVENTS
-
-  // These must be handled carefully, because naively registering a
-  // handler for each editor will cause the editors to never be
-  // garbage collected.
-
-  function forEachCodeMirror(f) {
-    if (!document.body.getElementsByClassName) return;
-    var byClass = document.body.getElementsByClassName("CodeMirror");
-    for (var i = 0; i < byClass.length; i++) {
-      var cm = byClass[i].CodeMirror;
-      if (cm) f(cm);
-    }
-  }
-
-  var globalsRegistered = false;
-  function ensureGlobalHandlers() {
-    if (globalsRegistered) return;
-    registerGlobalHandlers();
-    globalsRegistered = true;
-  }
-  function registerGlobalHandlers() {
-    // When the window resizes, we need to refresh active editors.
-    var resizeTimer;
-    on(window, "resize", function() {
-      if (resizeTimer == null) resizeTimer = setTimeout(function() {
-        resizeTimer = null;
-        forEachCodeMirror(onResize);
-      }, 100);
-    });
-    // When the window loses focus, we want to show the editor as blurred
-    on(window, "blur", function() {
-      forEachCodeMirror(onBlur);
-    });
-  }
-
-  // FEATURE DETECTION
-
-  // Detect drag-and-drop
-  var dragAndDrop = function() {
-    // There is *some* kind of drag-and-drop support in IE6-8, but I
-    // couldn't get it to work yet.
-    if (ie && ie_version < 9) return false;
-    var div = elt('div');
-    return "draggable" in div || "dragDrop" in div;
-  }();
-
-  var zwspSupported;
-  function zeroWidthElement(measure) {
-    if (zwspSupported == null) {
-      var test = elt("span", "\u200b");
-      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
-      if (measure.firstChild.offsetHeight != 0)
-        zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8);
-    }
-    var node = zwspSupported ? elt("span", "\u200b") :
-      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
-    node.setAttribute("cm-text", "");
-    return node;
-  }
-
-  // Feature-detect IE's crummy client rect reporting for bidi text
-  var badBidiRects;
-  function hasBadBidiRects(measure) {
-    if (badBidiRects != null) return badBidiRects;
-    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
-    var r0 = range(txt, 0, 1).getBoundingClientRect();
-    if (!r0 || r0.left == r0.right) return false; // Safari returns null in some cases (#2780)
-    var r1 = range(txt, 1, 2).getBoundingClientRect();
-    return badBidiRects = (r1.right - r0.right < 3);
-  }
-
-  // See if "".split is the broken IE version, if so, provide an
-  // alternative way to split lines.
-  var splitLinesAuto = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
-    var pos = 0, result = [], l = string.length;
-    while (pos <= l) {
-      var nl = string.indexOf("\n", pos);
-      if (nl == -1) nl = string.length;
-      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
-      var rt = line.indexOf("\r");
-      if (rt != -1) {
-        result.push(line.slice(0, rt));
-        pos += rt + 1;
-      } else {
-        result.push(line);
-        pos = nl + 1;
-      }
-    }
-    return result;
-  } : function(string){return string.split(/\r\n?|\n/);};
-
-  var hasSelection = window.getSelection ? function(te) {
-    try { return te.selectionStart != te.selectionEnd; }
-    catch(e) { return false; }
-  } : function(te) {
-    try {var range = te.ownerDocument.selection.createRange();}
-    catch(e) {}
-    if (!range || range.parentElement() != te) return false;
-    return range.compareEndPoints("StartToEnd", range) != 0;
-  };
-
-  var hasCopyEvent = (function() {
-    var e = elt("div");
-    if ("oncopy" in e) return true;
-    e.setAttribute("oncopy", "return;");
-    return typeof e.oncopy == "function";
-  })();
-
-  var badZoomedRects = null;
-  function hasBadZoomedRects(measure) {
-    if (badZoomedRects != null) return badZoomedRects;
-    var node = removeChildrenAndAdd(measure, elt("span", "x"));
-    var normal = node.getBoundingClientRect();
-    var fromRange = range(node, 0, 1).getBoundingClientRect();
-    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1;
-  }
-
-  // KEY NAMES
-
-  var keyNames = CodeMirror.keyNames = {
-    3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
-    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
-    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
-    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
-    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
-    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
-    221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
-    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
-  };
-  (function() {
-    // Number keys
-    for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
-    // Alphabetic keys
-    for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
-    // Function keys
-    for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
-  })();
-
-  // BIDI HELPERS
-
-  function iterateBidiSections(order, from, to, f) {
-    if (!order) return f(from, to, "ltr");
-    var found = false;
-    for (var i = 0; i < order.length; ++i) {
-      var part = order[i];
-      if (part.from < to && part.to > from || from == to && part.to == from) {
-        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
-        found = true;
-      }
-    }
-    if (!found) f(from, to, "ltr");
-  }
-
-  function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
-  function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
-
-  function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
-  function lineRight(line) {
-    var order = getOrder(line);
-    if (!order) return line.text.length;
-    return bidiRight(lst(order));
-  }
-
-  function lineStart(cm, lineN) {
-    var line = getLine(cm.doc, lineN);
-    var visual = visualLine(line);
-    if (visual != line) lineN = lineNo(visual);
-    var order = getOrder(visual);
-    var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
-    return Pos(lineN, ch);
-  }
-  function lineEnd(cm, lineN) {
-    var merged, line = getLine(cm.doc, lineN);
-    while (merged = collapsedSpanAtEnd(line)) {
-      line = merged.find(1, true).line;
-      lineN = null;
-    }
-    var order = getOrder(line);
-    var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
-    return Pos(lineN == null ? lineNo(line) : lineN, ch);
-  }
-  function lineStartSmart(cm, pos) {
-    var start = lineStart(cm, pos.line);
-    var line = getLine(cm.doc, start.line);
-    var order = getOrder(line);
-    if (!order || order[0].level == 0) {
-      var firstNonWS = Math.max(0, line.text.search(/\S/));
-      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
-      return Pos(start.line, inWS ? 0 : firstNonWS);
-    }
-    return start;
-  }
-
-  function compareBidiLevel(order, a, b) {
-    var linedir = order[0].level;
-    if (a == linedir) return true;
-    if (b == linedir) return false;
-    return a < b;
-  }
-  var bidiOther;
-  function getBidiPartAt(order, pos) {
-    bidiOther = null;
-    for (var i = 0, found; i < order.length; ++i) {
-      var cur = order[i];
-      if (cur.from < pos && cur.to > pos) return i;
-      if ((cur.from == pos || cur.to == pos)) {
-        if (found == null) {
-          found = i;
-        } else if (compareBidiLevel(order, cur.level, order[found].level)) {
-          if (cur.from != cur.to) bidiOther = found;
-          return i;
-        } else {
-          if (cur.from != cur.to) bidiOther = i;
-          return found;
-        }
-      }
-    }
-    return found;
-  }
-
-  function moveInLine(line, pos, dir, byUnit) {
-    if (!byUnit) return pos + dir;
-    do pos += dir;
-    while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
-    return pos;
-  }
-
-  // This is needed in order to move 'visually' through bi-directional
-  // text -- i.e., pressing left should make the cursor go left, even
-  // when in RTL text. The tricky part is the 'jumps', where RTL and
-  // LTR text touch each other. This often requires the cursor offset
-  // to move more than one unit, in order to visually move one unit.
-  function moveVisually(line, start, dir, byUnit) {
-    var bidi = getOrder(line);
-    if (!bidi) return moveLogically(line, start, dir, byUnit);
-    var pos = getBidiPartAt(bidi, start), part = bidi[pos];
-    var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
-
-    for (;;) {
-      if (target > part.from && target < part.to) return target;
-      if (target == part.from || target == part.to) {
-        if (getBidiPartAt(bidi, target) == pos) return target;
-        part = bidi[pos += dir];
-        return (dir > 0) == part.level % 2 ? part.to : part.from;
-      } else {
-        part = bidi[pos += dir];
-        if (!part) return null;
-        if ((dir > 0) == part.level % 2)
-          target = moveInLine(line, part.to, -1, byUnit);
-        else
-          target = moveInLine(line, part.from, 1, byUnit);
-      }
-    }
-  }
-
-  function moveLogically(line, start, dir, byUnit) {
-    var target = start + dir;
-    if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
-    return target < 0 || target > line.text.length ? null : target;
-  }
-
-  // Bidirectional ordering algorithm
-  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
-  // that this (partially) implements.
-
-  // One-char codes used for character types:
-  // L (L):   Left-to-Right
-  // R (R):   Right-to-Left
-  // r (AL):  Right-to-Left Arabic
-  // 1 (EN):  European Number
-  // + (ES):  European Number Separator
-  // % (ET):  European Number Terminator
-  // n (AN):  Arabic Number
-  // , (CS):  Common Number Separator
-  // m (NSM): Non-Spacing Mark
-  // b (BN):  Boundary Neutral
-  // s (B):   Paragraph Separator
-  // t (S):   Segment Separator
-  // w (WS):  Whitespace
-  // N (ON):  Other Neutrals
-
-  // Returns null if characters are ordered as they appear
-  // (left-to-right), or an array of sections ({from, to, level}
-  // objects) in the order in which they occur visually.
-  var bidiOrdering = (function() {
-    // Character types for codepoints 0 to 0xff
-    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
-    // Character types for codepoints 0x600 to 0x6ff
-    var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm";
-    function charType(code) {
-      if (code <= 0xf7) return lowTypes.charAt(code);
-      else if (0x590 <= code && code <= 0x5f4) return "R";
-      else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code - 0x600);
-      else if (0x6ee <= code && code <= 0x8ac) return "r";
-      else if (0x2000 <= code && code <= 0x200b) return "w";
-      else if (code == 0x200c) return "b";
-      else return "L";
-    }
-
-    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
-    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
-    // Browsers seem to always treat the boundaries of block elements as being L.
-    var outerType = "L";
-
-    function BidiSpan(level, from, to) {
-      this.level = level;
-      this.from = from; this.to = to;
-    }
-
-    return function(str) {
-      if (!bidiRE.test(str)) return false;
-      var len = str.length, types = [];
-      for (var i = 0, type; i < len; ++i)
-        types.push(type = charType(str.charCodeAt(i)));
-
-      // W1. Examine each non-spacing mark (NSM) in the level run, and
-      // change the type of the NSM to the type of the previous
-      // character. If the NSM is at the start of the level run, it will
-      // get the type of sor.
-      for (var i = 0, prev = outerType; i < len; ++i) {
-        var type = types[i];
-        if (type == "m") types[i] = prev;
-        else prev = type;
-      }
-
-      // W2. Search backwards from each instance of a European number
-      // until the first strong type (R, L, AL, or sor) is found. If an
-      // AL is found, change the type of the European number to Arabic
-      // number.
-      // W3. Change all ALs to R.
-      for (var i = 0, cur = outerType; i < len; ++i) {
-        var type = types[i];
-        if (type == "1" && cur == "r") types[i] = "n";
-        else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
-      }
-
-      // W4. A single European separator between two European numbers
-      // changes to a European number. A single common separator between
-      // two numbers of the same type changes to that type.
-      for (var i = 1, prev = types[0]; i < len - 1; ++i) {
-        var type = types[i];
-        if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
-        else if (type == "," && prev == types[i+1] &&
-                 (prev == "1" || prev == "n")) types[i] = prev;
-        prev = type;
-      }
-
-      // W5. A sequence of European terminators adjacent to European
-      // numbers changes to all European numbers.
-      // W6. Otherwise, separators and terminators change to Other
-      // Neutral.
-      for (var i = 0; i < len; ++i) {
-        var type = types[i];
-        if (type == ",") types[i] = "N";
-        else if (type == "%") {
-          for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
-          var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
-          for (var j = i; j < end; ++j) types[j] = replace;
-          i = end - 1;
-        }
-      }
-
-      // W7. Search backwards from each instance of a European number
-      // until the first strong type (R, L, or sor) is found. If an L is
-      // found, then change the type of the European number to L.
-      for (var i = 0, cur = outerType; i < len; ++i) {
-        var type = types[i];
-        if (cur == "L" && type == "1") types[i] = "L";
-        else if (isStrong.test(type)) cur = type;
-      }
-
-      // N1. A sequence of neutrals takes the direction of the
-      // surrounding strong text if the text on both sides has the same
-      // direction. European and Arabic numbers act as if they were R in
-      // terms of their influence on neutrals. Start-of-level-run (sor)
-      // and end-of-level-run (eor) are used at level run boundaries.
-      // N2. Any remaining neutrals take the embedding direction.
-      for (var i = 0; i < len; ++i) {
-        if (isNeutral.test(types[i])) {
-          for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
-          var before = (i ? types[i-1] : outerType) == "L";
-          var after = (end < len ? types[end] : outerType) == "L";
-          var replace = before || after ? "L" : "R";
-          for (var j = i; j < end; ++j) types[j] = replace;
-          i = end - 1;
-        }
-      }
-
-      // Here we depart from the documented algorithm, in order to avoid
-      // building up an actual levels array. Since there are only three
-      // levels (0, 1, 2) in an implementation that doesn't take
-      // explicit embedding into account, we can build up the order on
-      // the fly, without following the level-based algorithm.
-      var order = [], m;
-      for (var i = 0; i < len;) {
-        if (countsAsLeft.test(types[i])) {
-          var start = i;
-          for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
-          order.push(new BidiSpan(0, start, i));
-        } else {
-          var pos = i, at = order.length;
-          for (++i; i < len && types[i] != "L"; ++i) {}
-          for (var j = pos; j < i;) {
-            if (countsAsNum.test(types[j])) {
-              if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j));
-              var nstart = j;
-              for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
-              order.splice(at, 0, new BidiSpan(2, nstart, j));
-              pos = j;
-            } else ++j;
-          }
-          if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i));
-        }
-      }
-      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
-        order[0].from = m[0].length;
-        order.unshift(new BidiSpan(0, 0, m[0].length));
-      }
-      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
-        lst(order).to -= m[0].length;
-        order.push(new BidiSpan(0, len - m[0].length, len));
-      }
-      if (order[0].level == 2)
-        order.unshift(new BidiSpan(1, order[0].to, order[0].to));
-      if (order[0].level != lst(order).level)
-        order.push(new BidiSpan(order[0].level, len, len));
-
-      return order;
-    };
-  })();
-
-  // THE END
-
-  CodeMirror.version = "5.16.0";
-
-  return CodeMirror;
-});
+  }
+
+  textarea.style.display = "none"
+  var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+    options)
+  return cm
+}
+
+function addLegacyProps(CodeMirror) {
+  CodeMirror.off = off
+  CodeMirror.on = on
+  CodeMirror.wheelEventPixels = wheelEventPixels
+  CodeMirror.Doc = Doc
+  CodeMirror.splitLines = splitLinesAuto
+  CodeMirror.countColumn = countColumn
+  CodeMirror.findColumn = findColumn
+  CodeMirror.isWordChar = isWordCharBasic
+  CodeMirror.Pass = Pass
+  CodeMirror.signal = signal
+  CodeMirror.Line = Line
+  CodeMirror.changeEnd = changeEnd
+  CodeMirror.scrollbarModel = scrollbarModel
+  CodeMirror.Pos = Pos
+  CodeMirror.cmpPos = cmp
+  CodeMirror.modes = modes
+  CodeMirror.mimeModes = mimeModes
+  CodeMirror.resolveMode = resolveMode
+  CodeMirror.getMode = getMode
+  CodeMirror.modeExtensions = modeExtensions
+  CodeMirror.extendMode = extendMode
+  CodeMirror.copyState = copyState
+  CodeMirror.startState = startState
+  CodeMirror.innerMode = innerMode
+  CodeMirror.commands = commands
+  CodeMirror.keyMap = keyMap
+  CodeMirror.keyName = keyName
+  CodeMirror.isModifierKey = isModifierKey
+  CodeMirror.lookupKey = lookupKey
+  CodeMirror.normalizeKeyMap = normalizeKeyMap
+  CodeMirror.StringStream = StringStream
+  CodeMirror.SharedTextMarker = SharedTextMarker
+  CodeMirror.TextMarker = TextMarker
+  CodeMirror.LineWidget = LineWidget
+  CodeMirror.e_preventDefault = e_preventDefault
+  CodeMirror.e_stopPropagation = e_stopPropagation
+  CodeMirror.e_stop = e_stop
+  CodeMirror.addClass = addClass
+  CodeMirror.contains = contains
+  CodeMirror.rmClass = rmClass
+  CodeMirror.keyNames = keyNames
+}
+
+// EDITOR CONSTRUCTOR
+
+defineOptions(CodeMirror)
+
+addEditorMethods(CodeMirror)
+
+// Set up methods on CodeMirror's prototype to redirect to the editor's document.
+var dontDelegate = "iter insert remove copy getEditor constructor".split(" ")
+for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+  { CodeMirror.prototype[prop] = (function(method) {
+    return function() {return method.apply(this.doc, arguments)}
+  })(Doc.prototype[prop]) } }
+
+eventMixin(Doc)
+
+// INPUT HANDLING
+
+CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput}
+
+// MODE DEFINITION AND QUERYING
+
+// Extra arguments are stored as the mode's dependencies, which is
+// used by (legacy) mechanisms like loadmode.js to automatically
+// load a mode. (Preferred mechanism is the require/define calls.)
+CodeMirror.defineMode = function(name/*, mode, …*/) {
+  if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name }
+  defineMode.apply(this, arguments)
+}
+
+CodeMirror.defineMIME = defineMIME
+
+// Minimal default mode.
+CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); })
+CodeMirror.defineMIME("text/plain", "null")
+
+// EXTENSIONS
+
+CodeMirror.defineExtension = function (name, func) {
+  CodeMirror.prototype[name] = func
+}
+CodeMirror.defineDocExtension = function (name, func) {
+  Doc.prototype[name] = func
+}
+
+CodeMirror.fromTextArea = fromTextArea
+
+addLegacyProps(CodeMirror)
+
+CodeMirror.version = "5.27.4"
+
+return CodeMirror;
+
+})));
\ No newline at end of file
--- a/devtools/client/sourceeditor/codemirror/mode/clike/clike.js
+++ b/devtools/client/sourceeditor/codemirror/mode/clike/clike.js
@@ -16,29 +16,29 @@ function Context(indented, column, type,
   this.column = column;
   this.type = type;
   this.info = info;
   this.align = align;
   this.prev = prev;
 }
 function pushContext(state, col, type, info) {
   var indent = state.indented;
-  if (state.context && state.context.type != "statement" && type != "statement")
+  if (state.context && state.context.type == "statement" && type != "statement")
     indent = state.context.indented;
   return state.context = new Context(indent, col, type, info, null, state.context);
 }
 function popContext(state) {
   var t = state.context.type;
   if (t == ")" || t == "]" || t == "}")
     state.indented = state.context.indented;
   return state.context = state.context.prev;
 }
 
 function typeBefore(stream, state, pos) {
-  if (state.prevToken == "variable" || state.prevToken == "variable-3") return true;
+  if (state.prevToken == "variable" || state.prevToken == "type") return true;
   if (/\S(?:[^- ]>|[*\]])\s*$|\*$/.test(stream.string.slice(0, pos))) return true;
   if (state.typeAtEndOfLine && stream.column() == stream.indentation()) return true;
 }
 
 function isTopScope(context) {
   for (;;) {
     if (!context || context.type == "top") return true;
     if (context.type == "}" && context.prev.info != "namespace") return false;
@@ -60,17 +60,17 @@ CodeMirror.defineMode("clike", function(
       multiLineStrings = parserConfig.multiLineStrings,
       indentStatements = parserConfig.indentStatements !== false,
       indentSwitch = parserConfig.indentSwitch !== false,
       namespaceSeparator = parserConfig.namespaceSeparator,
       isPunctuationChar = parserConfig.isPunctuationChar || /[\[\]{}\(\),;\:\.]/,
       numberStart = parserConfig.numberStart || /[\d\.]/,
       number = parserConfig.number || /^(?:0x[a-f\d]+|0b[01]+|(?:\d+\.?\d*|\.\d+)(?:e[-+]?\d+)?)(u|ll?|l|f)?/i,
       isOperatorChar = parserConfig.isOperatorChar || /[+\-*&%=<>!?|\/]/,
-      endStatement = parserConfig.endStatement || /^[;:,]$/;
+      isIdentifierChar = parserConfig.isIdentifierChar || /[\w\$_\xa1-\uffff]/;
 
   var curPunc, isDefKeyword;
 
   function tokenBase(stream, state) {
     var ch = stream.next();
     if (hooks[ch]) {
       var result = hooks[ch](stream, state);
       if (result !== false) return result;
@@ -97,27 +97,27 @@ CodeMirror.defineMode("clike", function(
         stream.skipToEnd();
         return "comment";
       }
     }
     if (isOperatorChar.test(ch)) {
       while (!stream.match(/^\/[\/*]/, false) && stream.eat(isOperatorChar)) {}
       return "operator";
     }
-    stream.eatWhile(/[\w\$_\xa1-\uffff]/);
+    stream.eatWhile(isIdentifierChar);
     if (namespaceSeparator) while (stream.match(namespaceSeparator))
-      stream.eatWhile(/[\w\$_\xa1-\uffff]/);
+      stream.eatWhile(isIdentifierChar);
 
     var cur = stream.current();
     if (contains(keywords, cur)) {
       if (contains(blockKeywords, cur)) curPunc = "newstatement";
       if (contains(defKeywords, cur)) isDefKeyword = true;
       return "keyword";
     }
-    if (contains(types, cur)) return "variable-3";
+    if (contains(types, cur)) return "type";
     if (contains(builtin, cur)) {
       if (contains(blockKeywords, cur)) curPunc = "newstatement";
       return "builtin";
     }
     if (contains(atoms, cur)) return "atom";
     return "variable";
   }
 
@@ -172,17 +172,18 @@ CodeMirror.defineMode("clike", function(
         state.startOfLine = true;
       }
       if (stream.eatSpace()) { maybeEOL(stream, state); return null; }
       curPunc = isDefKeyword = null;
       var style = (state.tokenize || tokenBase)(stream, state);
       if (style == "comment" || style == "meta") return style;
       if (ctx.align == null) ctx.align = true;
 
-      if (endStatement.test(curPunc)) while (state.context.type == "statement") popContext(state);
+      if (curPunc == ";" || curPunc == ":" || (curPunc == "," && stream.match(/^\s*(?:\/\/.*)?$/, false)))
+        while (state.context.type == "statement") popContext(state);
       else if (curPunc == "{") pushContext(state, stream.column(), "}");
       else if (curPunc == "[") pushContext(state, stream.column(), "]");
       else if (curPunc == "(") pushContext(state, stream.column(), ")");
       else if (curPunc == "}") {
         while (ctx.type == "statement") ctx = popContext(state);
         if (ctx.type == "}") ctx = popContext(state);
         while (ctx.type == "statement") ctx = popContext(state);
       }
@@ -275,17 +276,17 @@ CodeMirror.defineMode("clike", function(
       }
       stream.next()
     }
     state.tokenize = next
     return "meta"
   }
 
   function pointerHook(_stream, state) {
-    if (state.prevToken == "variable-3") return "variable-3";
+    if (state.prevToken == "type") return "type";
     return false;
   }
 
   function cpp14Literal(stream) {
     stream.eatWhile(/[\w\.']/);
     return "number";
   }
 
@@ -309,17 +310,17 @@ CodeMirror.defineMode("clike", function(
       return false;
     }
     // Ignore this hook.
     stream.next();
     return false;
   }
 
   function cppLooksLikeConstructor(word) {
-    var lastTwo = /(\w+)::(\w+)$/.exec(word);
+    var lastTwo = /(\w+)::~?(\w+)$/.exec(word);
     return lastTwo && lastTwo[1] == lastTwo[2];
   }
 
   // C#-style strings where "" escapes a quote.
   function tokenAtString(stream, state) {
     var next;
     while ((next = stream.next()) != null) {
       if (next == '"' && !stream.eat('"')) {
@@ -385,16 +386,17 @@ CodeMirror.defineMode("clike", function(
                     "alignas alignof constexpr decltype nullptr noexcept thread_local final " +
                     "static_assert override"),
     types: words(cTypes + " bool wchar_t"),
     blockKeywords: words("catch class do else finally for if struct switch try while"),
     defKeywords: words("class namespace struct enum union"),
     typeFirstDefinitions: true,
     atoms: words("true false null"),
     dontIndentStatements: /^template$/,
+    isIdentifierChar: /[\w\$_~\xa1-\uffff]/,
     hooks: {
       "#": cppHook,
       "*": pointerHook,
       "u": cpp11StringHook,
       "U": cpp11StringHook,
       "L": cpp11StringHook,
       "R": cpp11StringHook,
       "0": cpp14Literal,
@@ -420,27 +422,29 @@ CodeMirror.defineMode("clike", function(
   });
 
   def("text/x-java", {
     name: "clike",
     keywords: words("abstract assert break case catch class const continue default " +
                     "do else enum extends final finally float for goto if implements import " +
                     "instanceof interface native new package private protected public " +
                     "return static strictfp super switch synchronized this throw throws transient " +
-                    "try volatile while"),
+                    "try volatile while @interface"),
     types: words("byte short int long float double boolean char void Boolean Byte Character Double Float " +
                  "Integer Long Number Object Short String StringBuffer StringBuilder Void"),
     blockKeywords: words("catch class do else finally for if switch try while"),
-    defKeywords: words("class interface package enum"),
+    defKeywords: words("class interface package enum @interface"),
     typeFirstDefinitions: true,
     atoms: words("true false null"),
-    endStatement: /^[;:]$/,
     number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+\.?\d*|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
     hooks: {
       "@": function(stream) {
+        // Don't match the @interface keyword.
+        if (stream.match('interface', false)) return false;
+
         stream.eatWhile(/[\w\$_]/);
         return "meta";
       }
     },
     modeProps: {fold: ["brace", "import"]}
   });
 
   def("text/x-csharp", {
@@ -486,44 +490,42 @@ CodeMirror.defineMode("clike", function(
 
   def("text/x-scala", {
     name: "clike",
     keywords: words(
 
       /* scala */
       "abstract case catch class def do else extends final finally for forSome if " +
       "implicit import lazy match new null object override package private protected return " +
-      "sealed super this throw trait try type val var while with yield _ : = => <- <: " +
-      "<% >: # @ " +
+      "sealed super this throw trait try type val var while with yield _ " +
 
       /* package scala */
       "assert assume require print println printf readLine readBoolean readByte readShort " +
-      "readChar readInt readLong readFloat readDouble " +
-
-      ":: #:: "
+      "readChar readInt readLong readFloat readDouble"
     ),
     types: words(
       "AnyVal App Application Array BufferedIterator BigDecimal BigInt Char Console Either " +
       "Enumeration Equiv Error Exception Fractional Function IndexedSeq Int Integral Iterable " +
       "Iterator List Map Numeric Nil NotNull Option Ordered Ordering PartialFunction PartialOrdering " +
       "Product Proxy Range Responder Seq Serializable Set Specializable Stream StringBuilder " +
       "StringContext Symbol Throwable Traversable TraversableOnce Tuple Unit Vector " +
 
       /* package java.lang */
       "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
       "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
       "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
       "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
     ),
     multiLineStrings: true,
-    blockKeywords: words("catch class do else finally for forSome if match switch try while"),
-    defKeywords: words("class def object package trait type val var"),
+    blockKeywords: words("catch class enum do else finally for forSome if match switch try while"),
+    defKeywords: words("class enum def object package trait type val var"),
     atoms: words("true false null"),
     indentStatements: false,
     indentSwitch: false,
+    isOperatorChar: /[+\-*&%=<>!?|\/#:@]/,
     hooks: {
       "@": function(stream) {
         stream.eatWhile(/[\w\$_]/);
         return "meta";
       },
       '"': function(stream, state) {
         if (!stream.match('""')) return false;
         state.tokenize = tokenTripleString;
@@ -570,28 +572,29 @@ CodeMirror.defineMode("clike", function(
       "package as typealias class interface this super val " +
       "var fun for is in This throw return " +
       "break continue object if else while do try when !in !is as? " +
 
       /*soft keywords*/
       "file import where by get set abstract enum open inner override private public internal " +
       "protected catch finally out final vararg reified dynamic companion constructor init " +
       "sealed field property receiver param sparam lateinit data inline noinline tailrec " +
-      "external annotation crossinline const operator infix"
+      "external annotation crossinline const operator infix suspend"
     ),
     types: words(
       /* package java.lang */
       "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
       "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
       "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
       "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
     ),
     intendSwitch: false,
     indentStatements: false,
     multiLineStrings: true,
+    number: /^(?:0x[a-f\d_]+|0b[01_]+|(?:[\d_]+\.?\d*|\.\d+)(?:e[-+]?[\d_]+)?)(u|ll?|l|f)?/i,
     blockKeywords: words("catch class do else finally for if where try while enum"),
     defKeywords: words("class val var object package interface fun"),
     atoms: words("true false null this"),
     hooks: {
       '"': function(stream, state) {
         state.tokenize = tokenKotlinString(stream.match('""'));
         return state.tokenize(stream, state);
       }
@@ -766,17 +769,17 @@ CodeMirror.defineMode("clike", function(
           stringTokenizer = null;
           return state.tokenize(stream, state);
         },
       "'": function(stream) {
         stream.eatWhile(/[\w\$_\xa1-\uffff]/);
         return "atom";
       },
       token: function(_stream, state, style) {
-          if ((style == "variable" || style == "variable-3") &&
+          if ((style == "variable" || style == "type") &&
               state.prevToken == ".") {
             return "variable-2";
           }
         }
     },
     modeProps: {
         fold: ["brace", "import"],
         closeBrackets: {triples: '"'}
--- a/devtools/client/sourceeditor/codemirror/mode/css/css.js
+++ b/devtools/client/sourceeditor/codemirror/mode/css/css.js
@@ -23,16 +23,17 @@ CodeMirror.defineMode("css", function(co
       mediaValueKeywords = parserConfig.mediaValueKeywords || {},
       propertyKeywords = parserConfig.propertyKeywords || {},
       nonStandardPropertyKeywords = parserConfig.nonStandardPropertyKeywords || {},
       fontProperties = parserConfig.fontProperties || {},
       counterDescriptors = parserConfig.counterDescriptors || {},
       colorKeywords = parserConfig.colorKeywords || {},
       valueKeywords = parserConfig.valueKeywords || {},
       allowNested = parserConfig.allowNested,
+      lineComment = parserConfig.lineComment,
       supportsAtComponent = parserConfig.supportsAtComponent === true;
 
   var type, override;
   function ret(style, tp) { type = tp; return style; }
 
   // Tokenizers
 
   function tokenBase(stream, state) {
@@ -248,16 +249,18 @@ CodeMirror.defineMode("css", function(co
     if (type == ")") return popContext(state);
     if (type == "(") return pushContext(state, stream, "parens");
     if (type == "interpolation") return pushContext(state, stream, "interpolation");
     if (type == "word") wordAsValue(stream);
     return "parens";
   };
 
   states.pseudo = function(type, stream, state) {
+    if (type == "meta") return "pseudo";
+
     if (type == "word") {
       override = "variable-3";
       return state.context.type;
     }
     return pass(type, stream, state);
   };
 
   states.documentTypes = function(type, stream, state) {
@@ -393,33 +396,33 @@ CodeMirror.defineMode("css", function(co
                           cx.type == "interpolation" || cx.type == "restricted_atBlock")) {
           // Resume indentation from parent context.
           cx = cx.prev;
           indent = cx.indent;
         } else if (ch == ")" && (cx.type == "parens" || cx.type == "atBlock_parens") ||
             ch == "{" && (cx.type == "at" || cx.type == "atBlock")) {
           // Dedent relative to current context.
           indent = Math.max(0, cx.indent - indentUnit);
-          cx = cx.prev;
         }
       }
       return indent;
     },
 
     electricChars: "}",
     blockCommentStart: "/*",
     blockCommentEnd: "*/",
+    lineComment: lineComment,
     fold: "brace"
   };
 });
 
   function keySet(array) {
     var keys = {};
     for (var i = 0; i < array.length; ++i) {
-      keys[array[i]] = true;
+      keys[array[i].toLowerCase()] = true;
     }
     return keys;
   }
 
   var documentTypes_ = [
     "domain", "regexp", "url", "url-prefix"
   ], documentTypes = keySet(documentTypes_);
 
@@ -463,17 +466,17 @@ CodeMirror.defineMode("css", function(co
     "border-image-repeat", "border-image-slice", "border-image-source",
     "border-image-width", "border-left", "border-left-color",
     "border-left-style", "border-left-width", "border-radius", "border-right",
     "border-right-color", "border-right-style", "border-right-width",
     "border-spacing", "border-style", "border-top", "border-top-color",
     "border-top-left-radius", "border-top-right-radius", "border-top-style",
     "border-top-width", "border-width", "bottom", "box-decoration-break",
     "box-shadow", "box-sizing", "break-after", "break-before", "break-inside",
-    "caption-side", "clear", "clip", "color", "color-profile", "column-count",
+    "caption-side", "caret-color", "clear", "clip", "color", "color-profile", "column-count",
     "column-fill", "column-gap", "column-rule", "column-rule-color",
     "column-rule-style", "column-rule-width", "column-span", "column-width",
     "columns", "content", "counter-increment", "counter-reset", "crop", "cue",
     "cue-after", "cue-before", "cursor", "direction", "display",
     "dominant-baseline", "drop-initial-after-adjust",
     "drop-initial-after-align", "drop-initial-before-adjust",
     "drop-initial-before-align", "drop-initial-size", "drop-initial-value",
     "elevation", "empty-cells", "fit", "fit-position", "flex", "flex-basis",
@@ -484,32 +487,32 @@ CodeMirror.defineMode("css", function(co
     "font-variant-alternates", "font-variant-caps", "font-variant-east-asian",
     "font-variant-ligatures", "font-variant-numeric", "font-variant-position",
     "font-weight", "grid", "grid-area", "grid-auto-columns", "grid-auto-flow",
     "grid-auto-rows", "grid-column", "grid-column-end", "grid-column-gap",
     "grid-column-start", "grid-gap", "grid-row", "grid-row-end", "grid-row-gap",
     "grid-row-start", "grid-template", "grid-template-areas", "grid-template-columns",
     "grid-template-rows", "hanging-punctuation", "height", "hyphens",
     "icon", "image-orientation", "image-rendering", "image-resolution",
-    "inline-box-align", "justify-content", "left", "letter-spacing",
+    "inline-box-align", "justify-content", "justify-items", "justify-self", "left", "letter-spacing",
     "line-break", "line-height", "line-stacking", "line-stacking-ruby",
     "line-stacking-shift", "line-stacking-strategy", "list-style",
     "list-style-image", "list-style-position", "list-style-type", "margin",
     "margin-bottom", "margin-left", "margin-right", "margin-top",
     "marks", "marquee-direction", "marquee-loop",
     "marquee-play-count", "marquee-speed", "marquee-style", "max-height",
     "max-width", "min-height", "min-width", "move-to", "nav-down", "nav-index",
     "nav-left", "nav-right", "nav-up", "object-fit", "object-position",
     "opacity", "order", "orphans", "outline",
     "outline-color", "outline-offset", "outline-style", "outline-width",
     "overflow", "overflow-style", "overflow-wrap", "overflow-x", "overflow-y",
     "padding", "padding-bottom", "padding-left", "padding-right", "padding-top",
     "page", "page-break-after", "page-break-before", "page-break-inside",
     "page-policy", "pause", "pause-after", "pause-before", "perspective",
-    "perspective-origin", "pitch", "pitch-range", "play-during", "position",
+    "perspective-origin", "pitch", "pitch-range", "place-content", "place-items", "place-self", "play-during", "position",
     "presentation-level", "punctuation-trim", "quotes", "region-break-after",
     "region-break-before", "region-break-inside", "region-fragment",
     "rendering-intent", "resize", "rest", "rest-after", "rest-before", "richness",
     "right", "rotation", "rotation-point", "ruby-align", "ruby-overhang",
     "ruby-position", "ruby-span", "shape-image-threshold", "shape-inside", "shape-margin",
     "shape-outside", "size", "speak", "speak-as", "speak-header",
     "speak-numeral", "speak-punctuation", "speech-rate", "stress", "string-set",
     "tab-size", "table-layout", "target", "target-name", "target-new",
@@ -517,19 +520,19 @@ CodeMirror.defineMode("css", function(co
     "text-decoration-color", "text-decoration-line", "text-decoration-skip",
     "text-decoration-style", "text-emphasis", "text-emphasis-color",
     "text-emphasis-position", "text-emphasis-style", "text-height",
     "text-indent", "text-justify", "text-outline", "text-overflow", "text-shadow",
     "text-size-adjust", "text-space-collapse", "text-transform", "text-underline-position",
     "text-wrap", "top", "transform", "transform-origin", "transform-style",
     "transition", "transition-delay", "transition-duration",
     "transition-property", "transition-timing-function", "unicode-bidi",
-    "vertical-align", "visibility", "voice-balance", "voice-duration",
+    "user-select", "vertical-align", "visibility", "voice-balance", "voice-duration",
     "voice-family", "voice-pitch", "voice-range", "voice-rate", "voice-stress",
-    "voice-volume", "volume", "white-space", "widows", "width", "word-break",
+    "voice-volume", "volume", "white-space", "widows", "width", "will-change", "word-break",
     "word-spacing", "word-wrap", "z-index",
     // SVG-specific
     "clip-path", "clip-rule", "mask", "enable-background", "filter", "flood-color",
     "flood-opacity", "lighting-color", "stop-color", "stop-opacity", "pointer-events",
     "color-interpolation", "color-interpolation-filters",
     "color-rendering", "fill", "fill-opacity", "fill-rule", "image-rendering",
     "marker", "marker-end", "marker-mid", "marker-start", "shape-rendering", "stroke",
     "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin",
@@ -584,26 +587,26 @@ CodeMirror.defineMode("css", function(co
     "teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white",
     "whitesmoke", "yellow", "yellowgreen"
   ], colorKeywords = keySet(colorKeywords_);
 
   var valueKeywords_ = [
     "above", "absolute", "activeborder", "additive", "activecaption", "afar",
     "after-white-space", "ahead", "alias", "all", "all-scroll", "alphabetic", "alternate",
     "always", "amharic", "amharic-abegede", "antialiased", "appworkspace",
-    "arabic-indic", "armenian", "asterisks", "attr", "auto", "avoid", "avoid-column", "avoid-page",
+    "arabic-indic", "armenian", "asterisks", "attr", "auto", "auto-flow", "avoid", "avoid-column", "avoid-page",
     "avoid-region", "background", "backwards", "baseline", "below", "bidi-override", "binary",
     "bengali", "blink", "block", "block-axis", "bold", "bolder", "border", "border-box",
     "both", "bottom", "break", "break-all", "break-word", "bullets", "button", "button-bevel",
     "buttonface", "buttonhighlight", "buttonshadow", "buttontext", "calc", "cambodian",
     "capitalize", "caps-lock-indicator", "caption", "captiontext", "caret",
     "cell", "center", "checkbox", "circle", "cjk-decimal", "cjk-earthly-branch",
     "cjk-heavenly-stem", "cjk-ideographic", "clear", "clip", "close-quote",
     "col-resize", "collapse", "color", "color-burn", "color-dodge", "column", "column-reverse",
-    "compact", "condensed", "contain", "content",
+    "compact", "condensed", "contain", "content", "contents",
     "content-box", "context-menu", "continuous", "copy", "counter", "counters", "cover", "crop",
     "cross", "crosshair", "currentcolor", "cursive", "cyclic", "darken", "dashed", "decimal",
     "decimal-leading-zero", "default", "default-button", "dense", "destination-atop",
     "destination-in", "destination-out", "destination-over", "devanagari", "difference",
     "disc", "discard", "disclosure-closed", "disclosure-open", "document",
     "dot-dash", "dot-dot-dash",
     "dotted", "double", "down", "e-resize", "ease", "ease-in", "ease-in-out", "ease-out",
     "element", "ellipse", "ellipsis", "embed", "end", "ethiopic", "ethiopic-abegede",
@@ -636,49 +639,49 @@ CodeMirror.defineMode("css", function(co
     "media-seek-back-button", "media-seek-forward-button", "media-slider",
     "media-sliderthumb", "media-time-remaining-display", "media-volume-slider",
     "media-volume-slider-container", "media-volume-sliderthumb", "medium",
     "menu", "menulist", "menulist-button", "menulist-text",
     "menulist-textfield", "menutext", "message-box", "middle", "min-intrinsic",
     "mix", "mongolian", "monospace", "move", "multiple", "multiply", "myanmar", "n-resize",
     "narrower", "ne-resize", "nesw-resize", "no-close-quote", "no-drop",
     "no-open-quote", "no-repeat", "none", "normal", "not-allowed", "nowrap",
-    "ns-resize", "numbers", "numeric", "nw-resize", "nwse-resize", "oblique", "octal", "open-quote",
+    "ns-resize", "numbers", "numeric", "nw-resize", "nwse-resize", "oblique", "octal", "opacity", "open-quote",
     "optimizeLegibility", "optimizeSpeed", "oriya", "oromo", "outset",
     "outside", "outside-shape", "overlay", "overline", "padding", "padding-box",
     "painted", "page", "paused", "persian", "perspective", "plus-darker", "plus-lighter",
     "pointer", "polygon", "portrait", "pre", "pre-line", "pre-wrap", "preserve-3d",
     "progress", "push-button", "radial-gradient", "radio", "read-only",
     "read-write", "read-write-plaintext-only", "rectangle", "region",
     "relative", "repeat", "repeating-linear-gradient",
     "repeating-radial-gradient", "repeat-x", "repeat-y", "reset", "reverse",
     "rgb", "rgba", "ridge", "right", "rotate", "rotate3d", "rotateX", "rotateY",
     "rotateZ", "round", "row", "row-resize", "row-reverse", "rtl", "run-in", "running",
     "s-resize", "sans-serif", "saturation", "scale", "scale3d", "scaleX", "scaleY", "scaleZ", "screen",
-    "scroll", "scrollbar", "se-resize", "searchfield",
+    "scroll", "scrollbar", "scroll-position", "se-resize", "searchfield",
     "searchfield-cancel-button", "searchfield-decoration",
-    "searchfield-results-button", "searchfield-results-decoration",
+    "searchfield-results-button", "searchfield-results-decoration", "self-start", "self-end",
     "semi-condensed", "semi-expanded", "separate", "serif", "show", "sidama",
     "simp-chinese-formal", "simp-chinese-informal", "single",
     "skew", "skewX", "skewY", "skip-white-space", "slide", "slider-horizontal",
     "slider-vertical", "sliderthumb-horizontal", "sliderthumb-vertical", "slow",
     "small", "small-caps", "small-caption", "smaller", "soft-light", "solid", "somali",
-    "source-atop", "source-in", "source-out", "source-over", "space", "space-around", "space-between", "spell-out", "square",
+    "source-atop", "source-in", "source-out", "source-over", "space", "space-around", "space-between", "space-evenly", "spell-out", "square",
     "square-button", "start", "static", "status-bar", "stretch", "stroke", "sub",
-    "subpixel-antialiased", "super", "sw-resize", "symbolic", "symbols", "table",
+    "subpixel-antialiased", "super", "sw-resize", "symbolic", "symbols", "system-ui", "table",
     "table-caption", "table-cell", "table-column", "table-column-group",
     "table-footer-group", "table-header-group", "table-row", "table-row-group",
     "tamil",
     "telugu", "text", "text-bottom", "text-top", "textarea", "textfield", "thai",
     "thick", "thin", "threeddarkshadow", "threedface", "threedhighlight",
     "threedlightshadow", "threedshadow", "tibetan", "tigre", "tigrinya-er",
     "tigrinya-er-abegede", "tigrinya-et", "tigrinya-et-abegede", "to", "top",
-    "trad-chinese-formal", "trad-chinese-informal",
+    "trad-chinese-formal", "trad-chinese-informal", "transform",
     "translate", "translate3d", "translateX", "translateY", "translateZ",
-    "transparent", "ultra-condensed", "ultra-expanded", "underline", "up",
+    "transparent", "ultra-condensed", "ultra-expanded", "underline", "unset", "up",
     "upper-alpha", "upper-armenian", "upper-greek", "upper-hexadecimal",
     "upper-latin", "upper-norwegian", "upper-roman", "uppercase", "urdu", "url",
     "var", "vertical", "vertical-text", "visible", "visibleFill", "visiblePainted",
     "visibleStroke", "visual", "w-resize", "wait", "wave", "wider",
     "window", "windowframe", "windowtext", "words", "wrap", "wrap-reverse", "x-large", "x-small", "xor",
     "xx-large", "xx-small"
   ], valueKeywords = keySet(valueKeywords_);
 
@@ -725,31 +728,32 @@ CodeMirror.defineMode("css", function(co
     mediaFeatures: mediaFeatures,
     mediaValueKeywords: mediaValueKeywords,
     propertyKeywords: propertyKeywords,
     nonStandardPropertyKeywords: nonStandardPropertyKeywords,
     colorKeywords: colorKeywords,
     valueKeywords: valueKeywords,
     fontProperties: fontProperties,
     allowNested: true,
+    lineComment: "//",
     tokenHooks: {
       "/": function(stream, state) {
         if (stream.eat("/")) {
           stream.skipToEnd();
           return ["comment", "comment"];
         } else if (stream.eat("*")) {
           state.tokenize = tokenCComment;
           return tokenCComment(stream, state);
         } else {
           return ["operator", "operator"];
         }
       },
       ":": function(stream) {
-        if (stream.match(/\s*\{/))
-          return [null, "{"];
+        if (stream.match(/\s*\{/, false))
+          return [null, null]
         return false;
       },
       "$": function(stream) {
         stream.match(/^[\w-]+/);
         if (stream.match(/^\s*:/, false))
           return ["variable-2", "variable-definition"];
         return ["variable-2", "variable"];
       },
@@ -767,16 +771,17 @@ CodeMirror.defineMode("css", function(co
     mediaFeatures: mediaFeatures,
     mediaValueKeywords: mediaValueKeywords,
     propertyKeywords: propertyKeywords,
     nonStandardPropertyKeywords: nonStandardPropertyKeywords,
     colorKeywords: colorKeywords,
     valueKeywords: valueKeywords,
     fontProperties: fontProperties,
     allowNested: true,
+    lineComment: "//",
     tokenHooks: {
       "/": function(stream, state) {
         if (stream.eat("/")) {
           stream.skipToEnd();
           return ["comment", "comment"];
         } else if (stream.eat("*")) {
           state.tokenize = tokenCComment;
           return tokenCComment(stream, state);
--- a/devtools/client/sourceeditor/codemirror/mode/elm/elm.js
+++ b/devtools/client/sourceeditor/codemirror/mode/elm/elm.js
@@ -65,17 +65,17 @@
           if (source.eat('.'))
             return "qualifier";
           return "variable-2";
         }
 
         if (smallRE.test(ch)) {
           var isDef = source.pos === 1;
           source.eatWhile(idRE);
-          return isDef ? "variable-3" : "variable";
+          return isDef ? "type" : "variable";
         }
 
         if (digitRE.test(ch)) {
           if (ch == '0') {
             if (source.eat(/[xX]/)) {
               source.eatWhile(hexitRE); // should require at least 1
               return "integer";
             }
--- a/devtools/client/sourceeditor/codemirror/mode/htmlmixed/htmlmixed.js
+++ b/devtools/client/sourceeditor/codemirror/mode/htmlmixed/htmlmixed.js
@@ -9,17 +9,17 @@
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   "use strict";
 
   var defaultTags = {
     script: [
       ["lang", /(javascript|babel)/i, "javascript"],
-      ["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^$/i, "javascript"],
+      ["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^module$|^$/i, "javascript"],
       ["type", /./, "text/plain"],
       [null, null, "javascript"]
     ],
     style:  [
       ["lang", /^css$/i, "css"],
       ["type", /^(text\/)?(x-)?(stylesheet|css)$/i, "css"],
       ["type", /./, "text/plain"],
       [null, null, "css"]
@@ -41,17 +41,17 @@
   function getAttrRegexp(attr) {
     var regexp = attrRegexpCache[attr];
     if (regexp) return regexp;
     return attrRegexpCache[attr] = new RegExp("\\s+" + attr + "\\s*=\\s*('|\")?([^'\"]+)('|\")?\\s*");
   }
 
   function getAttrValue(text, attr) {
     var match = text.match(getAttrRegexp(attr))
-    return match ? match[2] : ""
+    return match ? /^\s*(.*?)\s*$/.exec(match[2])[1] : ""
   }
 
   function getTagRegexp(tagName, anchored) {
     return new RegExp((anchored ? "^" : "") + "<\/\s*" + tagName + "\s*>", "i");
   }
 
   function addTags(from, to) {
     for (var tag in from) {
@@ -128,21 +128,21 @@
                 localMode: state.localMode, localState: local,
                 htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};
       },
 
       token: function (stream, state) {
         return state.token(stream, state);
       },
 
-      indent: function (state, textAfter) {
+      indent: function (state, textAfter, line) {
         if (!state.localMode || /^\s*<\//.test(textAfter))
           return htmlMode.indent(state.htmlState, textAfter);
         else if (state.localMode.indent)
-          return state.localMode.indent(state.localState, textAfter);
+          return state.localMode.indent(state.localState, textAfter, line);
         else
           return CodeMirror.Pass;
       },
 
       innerMode: function (state) {
         return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode};
       }
     };
--- a/devtools/client/sourceeditor/codemirror/mode/javascript/javascript.js
+++ b/devtools/client/sourceeditor/codemirror/mode/javascript/javascript.js
@@ -1,25 +1,23 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
-// TODO actually recognize syntax of TypeScript constructs
-
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
 "use strict";
 
 function expressionAllowed(stream, state, backUp) {
-  return /^(?:operator|sof|keyword c|case|new|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
+  return /^(?:operator|sof|keyword c|case|new|export|default|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
     (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
 }
 
 CodeMirror.defineMode("javascript", function(config, parserConfig) {
   var indentUnit = config.indentUnit;
   var statementIndent = parserConfig.statementIndent;
   var jsonldMode = parserConfig.jsonld;
   var jsonMode = parserConfig.json || jsonldMode;
@@ -38,52 +36,49 @@ CodeMirror.defineMode("javascript", func
       "return": C, "break": C, "continue": C, "new": kw("new"), "delete": C, "throw": C, "debugger": C,
       "var": kw("var"), "const": kw("var"), "let": kw("var"),
       "function": kw("function"), "catch": kw("catch"),
       "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
       "in": operator, "typeof": operator, "instanceof": operator,
       "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
       "this": kw("this"), "class": kw("class"), "super": kw("atom"),
       "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
-      "await": C, "async": kw("async")
+      "await": C
     };
 
     // Extend the 'normal' keywords with the TypeScript language extensions
     if (isTS) {
-      var type = {type: "variable", style: "variable-3"};
+      var type = {type: "variable", style: "type"};
       var tsKeywords = {
         // object-like things
         "interface": kw("class"),
         "implements": C,
         "namespace": C,
         "module": kw("module"),
         "enum": kw("module"),
 
         // scope modifiers
         "public": kw("modifier"),
         "private": kw("modifier"),
         "protected": kw("modifier"),
         "abstract": kw("modifier"),
 
-        // operators
-        "as": operator,
-
         // types
         "string": type, "number": type, "boolean": type, "any": type
       };
 
       for (var attr in tsKeywords) {
         jsKeywords[attr] = tsKeywords[attr];
       }
     }
 
     return jsKeywords;
   }();
 
-  var isOperatorChar = /[+\-*&%=<>!?|~^]/;
+  var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
   var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
 
   function readRegexp(stream) {
     var escaped = false, next, inSet = false;
     while ((next = stream.next()) != null) {
       if (!escaped) {
         if (next == "/" && !inSet) return;
         if (next == "[") inSet = true;
@@ -142,23 +137,31 @@ CodeMirror.defineMode("javascript", func
       }
     } else if (ch == "`") {
       state.tokenize = tokenQuasi;
       return tokenQuasi(stream, state);
     } else if (ch == "#") {
       stream.skipToEnd();
       return ret("error", "error");
     } else if (isOperatorChar.test(ch)) {
-      stream.eatWhile(isOperatorChar);
+      if (ch != ">" || !state.lexical || state.lexical.type != ">")
+        stream.eatWhile(isOperatorChar);
       return ret("operator", "operator", stream.current());
     } else if (wordRE.test(ch)) {
       stream.eatWhile(wordRE);
-      var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];
-      return (known && state.lastType != ".") ? ret(known.type, known.style, word) :
-                     ret("variable", "variable", word);
+      var word = stream.current()
+      if (state.lastType != ".") {
+        if (keywords.propertyIsEnumerable(word)) {
+          var kw = keywords[word]
+          return ret(kw.type, kw.style, word)
+        }
+        if (word == "async" && stream.match(/^\s*[\(\w]/, false))
+          return ret("async", "keyword", word)
+      }
+      return ret("variable", "variable", word)
     }
   }
 
   function tokenString(quote) {
     return function(stream, state) {
       var escaped = false, next;
       if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
         state.tokenize = tokenBase;
@@ -205,23 +208,28 @@ CodeMirror.defineMode("javascript", func
   // (comments) in between. Fallback is to only notice when we hit the
   // arrow, and not declare the arguments as locals for the arrow
   // body.
   function findFatArrow(stream, state) {
     if (state.fatArrowAt) state.fatArrowAt = null;
     var arrow = stream.string.indexOf("=>", stream.start);
     if (arrow < 0) return;
 
+    if (isTS) { // Try to skip TypeScript return type declarations after the arguments
+      var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
+      if (m) arrow = m.index
+    }
+
     var depth = 0, sawSomething = false;
     for (var pos = arrow - 1; pos >= 0; --pos) {
       var ch = stream.string.charAt(pos);
       var bracket = brackets.indexOf(ch);
       if (bracket >= 0 && bracket < 3) {
         if (!depth) { ++pos; break; }
-        if (--depth == 0) break;
+        if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
       } else if (bracket >= 3 && bracket < 6) {
         ++depth;
       } else if (wordRE.test(ch)) {
         sawSomething = true;
       } else if (/["'\/]/.test(ch)) {
         return;
       } else if (sawSomething && !depth) {
         ++pos;
@@ -340,59 +348,72 @@ CodeMirror.defineMode("javascript", func
       else if (wanted == ";") return pass();
       else return cont(exp);
     };
     return exp;
   }
 
   function statement(type, value) {
     if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex);
-    if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);
+    if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
     if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
     if (type == "{") return cont(pushlex("}"), block, poplex);
     if (type == ";") return cont();
     if (type == "if") {
       if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
         cx.state.cc.pop()();
-      return cont(pushlex("form"), expression, statement, poplex, maybeelse);
+      return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
     }
     if (type == "function") return cont(functiondef);
     if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
-    if (type == "variable") return cont(pushlex("stat"), maybelabel);
-    if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),
+    if (type == "variable") {
+      if (isTS && value == "type") {
+        cx.marked = "keyword"
+        return cont(typeexpr, expect("operator"), typeexpr, expect(";"));
+      } else {
+        return cont(pushlex("stat"), maybelabel);
+      }
+    }
+    if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"),
                                       block, poplex, poplex);
     if (type == "case") return cont(expression, expect(":"));
     if (type == "default") return cont(expect(":"));
     if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),
                                      statement, poplex, popcontext);
     if (type == "class") return cont(pushlex("form"), className, poplex);
     if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
     if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
-    if (type == "module") return cont(pushlex("form"), pattern, pushlex("}"), expect("{"), block, poplex, poplex)
+    if (type == "module") return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
     if (type == "async") return cont(statement)
+    if (value == "@") return cont(expression, statement)
     return pass(pushlex("stat"), expression, expect(";"), poplex);
   }
   function expression(type) {
     return expressionInner(type, false);
   }
   function expressionNoComma(type) {
     return expressionInner(type, true);
   }
+  function parenExpr(type) {
+    if (type != "(") return pass()
+    return cont(pushlex(")"), expression, expect(")"), poplex)
+  }
   function expressionInner(type, noComma) {
     if (cx.state.fatArrowAt == cx.stream.start) {
       var body = noComma ? arrowBodyNoComma : arrowBody;
       if (type == "(") return cont(pushcontext, pushlex(")"), commasep(pattern, ")"), poplex, expect("=>"), body, popcontext);
       else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
     }
 
     var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
     if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
     if (type == "function") return cont(functiondef, maybeop);
-    if (type == "keyword c") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
-    if (type == "(") return cont(pushlex(")"), maybeexpression, comprehension, expect(")"), poplex, maybeop);
+    if (type == "class") return cont(pushlex("form"), classExpression, poplex);
+    if (type == "keyword c" || type == "async") return cont(noComma ? maybeexpressionNoComma : maybeexpression);
+    if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
     if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
     if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
     if (type == "{") return contCommasep(objprop, "}", null, maybeop);
     if (type == "quasi") return pass(quasi, maybeop);
     if (type == "new") return cont(maybeTarget(noComma));
     return cont();
   }
   function maybeexpression(type) {
@@ -417,16 +438,17 @@ CodeMirror.defineMode("javascript", func
       if (value == "?") return cont(expression, expect(":"), expr);
       return cont(expr);
     }
     if (type == "quasi") { return pass(quasi, me); }
     if (type == ";") return;
     if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
     if (type == ".") return cont(property, me);
     if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
+    if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
   }
   function quasi(type, value) {
     if (type != "quasi") return pass();
     if (value.slice(value.length - 2) != "${") return cont(quasi);
     return cont(expression, continueQuasi);
   }
   function continueQuasi(type) {
     if (type == "}") {
@@ -458,48 +480,56 @@ CodeMirror.defineMode("javascript", func
   function maybelabel(type) {
     if (type == ":") return cont(poplex, statement);
     return pass(maybeoperatorComma, expect(";"), poplex);
   }
   function property(type) {
     if (type == "variable") {cx.marked = "property"; return cont();}
   }
   function objprop(type, value) {
-    if (type == "variable" || cx.style == "keyword") {
+    if (type == "async") {
+      cx.marked = "property";
+      return cont(objprop);
+    } else if (type == "variable" || cx.style == "keyword") {
       cx.marked = "property";
       if (value == "get" || value == "set") return cont(getterSetter);
       return cont(afterprop);
     } else if (type == "number" || type == "string") {
       cx.marked = jsonldMode ? "property" : (cx.style + " property");
       return cont(afterprop);
     } else if (type == "jsonld-keyword") {
       return cont(afterprop);
     } else if (type == "modifier") {
       return cont(objprop)
     } else if (type == "[") {
       return cont(expression, expect("]"), afterprop);
     } else if (type == "spread") {
-      return cont(expression);
+      return cont(expression, afterprop);
+    } else if (type == ":") {
+      return pass(afterprop)
     }
   }
   function getterSetter(type) {
     if (type != "variable") return pass(afterprop);
     cx.marked = "property";
     return cont(functiondef);
   }
   function afterprop(type) {
     if (type == ":") return cont(expressionNoComma);
     if (type == "(") return pass(functiondef);
   }
-  function commasep(what, end) {
+  function commasep(what, end, sep) {
     function proceed(type, value) {
-      if (type == ",") {
+      if (sep ? sep.indexOf(type) > -1 : type == ",") {
         var lex = cx.state.lexical;
         if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
-        return cont(what, proceed);
+        return cont(function(type, value) {
+          if (type == end || value == end) return pass()
+          return pass(what)
+        }, proceed);
       }
       if (type == end || value == end) return cont();
       return cont(expect(end));
     }
     return function(type, value) {
       if (type == end || value == end) return cont();
       return pass(what, proceed);
     };
@@ -508,28 +538,52 @@ CodeMirror.defineMode("javascript", func
     for (var i = 3; i < arguments.length; i++)
       cx.cc.push(arguments[i]);
     return cont(pushlex(end, info), commasep(what, end), poplex);
   }
   function block(type) {
     if (type == "}") return cont();
     return pass(statement, block);
   }
-  function maybetype(type) {
-    if (isTS && type == ":") return cont(typeexpr);
-  }
-  function maybedefault(_, value) {
-    if (value == "=") return cont(expressionNoComma);
+  function maybetype(type, value) {
+    if (isTS) {
+      if (type == ":") return cont(typeexpr);
+      if (value == "?") return cont(maybetype);
+    }
   }
   function typeexpr(type) {
-    if (type == "variable") {cx.marked = "variable-3"; return cont(afterType);}
+    if (type == "variable") {cx.marked = "type"; return cont(afterType);}
+    if (type == "string" || type == "number" || type == "atom") return cont(afterType);
+    if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
+    if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType)
+  }
+  function maybeReturnType(type) {
+    if (type == "=>") return cont(typeexpr)
+  }
+  function typeprop(type, value) {
+    if (type == "variable" || cx.style == "keyword") {
+      cx.marked = "property"
+      return cont(typeprop)
+    } else if (value == "?") {
+      return cont(typeprop)
+    } else if (type == ":") {
+      return cont(typeexpr)
+    } else if (type == "[") {
+      return cont(expression, maybetype, expect("]"), typeprop)
+    }
+  }
+  function typearg(type) {
+    if (type == "variable") return cont(typearg)
+    else if (type == ":") return cont(typeexpr)
   }
   function afterType(type, value) {
-    if (value == "<") return cont(commasep(typeexpr, ">"), afterType)
+    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
+    if (value == "|" || type == ".") return cont(typeexpr)
     if (type == "[") return cont(expect("]"), afterType)
+    if (value == "extends") return cont(typeexpr)
   }
   function vardef() {
     return pass(pattern, maybetype, maybeAssign, vardefCont);
   }
   function pattern(type, value) {
     if (type == "modifier") return cont(pattern)
     if (type == "variable") { register(value); return cont(); }
     if (type == "spread") return cont(pattern);
@@ -575,84 +629,96 @@ CodeMirror.defineMode("javascript", func
   }
   function forspec3(type) {
     if (type != ")") cont(expression);
   }
   function functiondef(type, value) {
     if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
     if (type == "variable") {register(value); return cont(functiondef);}
     if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, maybetype, statement, popcontext);
+    if (isTS && value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, functiondef)
   }
   function funarg(type) {
     if (type == "spread") return cont(funarg);
-    return pass(pattern, maybetype, maybedefault);
+    return pass(pattern, maybetype, maybeAssign);
+  }
+  function classExpression(type, value) {
+    // Class expressions may have an optional name.
+    if (type == "variable") return className(type, value);
+    return classNameAfter(type, value);
   }
   function className(type, value) {
     if (type == "variable") {register(value); return cont(classNameAfter);}
   }
   function classNameAfter(type, value) {
-    if (value == "extends") return cont(expression, classNameAfter);
+    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, classNameAfter)
+    if (value == "extends" || value == "implements" || (isTS && type == ","))
+      return cont(isTS ? typeexpr : expression, classNameAfter);
     if (type == "{") return cont(pushlex("}"), classBody, poplex);
   }
   function classBody(type, value) {
     if (type == "variable" || cx.style == "keyword") {
-      if (value == "static") {
+      if ((value == "async" || value == "static" || value == "get" || value == "set" ||
+           (isTS && (value == "public" || value == "private" || value == "protected" || value == "readonly" || value == "abstract"))) &&
+          cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false)) {
         cx.marked = "keyword";
         return cont(classBody);
       }
       cx.marked = "property";
-      if (value == "get" || value == "set") return cont(classGetterSetter, functiondef, classBody);
-      return cont(functiondef, classBody);
+      return cont(isTS ? classfield : functiondef, classBody);
     }
+    if (type == "[")
+      return cont(expression, expect("]"), isTS ? classfield : functiondef, classBody)
     if (value == "*") {
       cx.marked = "keyword";
       return cont(classBody);
     }
     if (type == ";") return cont(classBody);
     if (type == "}") return cont();
+    if (value == "@") return cont(expression, classBody)
   }
-  function classGetterSetter(type) {
-    if (type != "variable") return pass();
-    cx.marked = "property";
-    return cont();
+  function classfield(type, value) {
+    if (value == "?") return cont(classfield)
+    if (type == ":") return cont(typeexpr, maybeAssign)
+    if (value == "=") return cont(expressionNoComma)
+    return pass(functiondef)
   }
-  function afterExport(_type, value) {
+  function afterExport(type, value) {
     if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
     if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
+    if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
     return pass(statement);
   }
+  function exportField(type, value) {
+    if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
+    if (type == "variable") return pass(expressionNoComma, exportField);
+  }
   function afterImport(type) {
     if (type == "string") return cont();
-    return pass(importSpec, maybeFrom);
+    return pass(importSpec, maybeMoreImports, maybeFrom);
   }
   function importSpec(type, value) {
     if (type == "{") return contCommasep(importSpec, "}");
     if (type == "variable") register(value);
     if (value == "*") cx.marked = "keyword";
     return cont(maybeAs);
   }
+  function maybeMoreImports(type) {
+    if (type == ",") return cont(importSpec, maybeMoreImports)
+  }
   function maybeAs(_type, value) {
     if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
   }
   function maybeFrom(_type, value) {
     if (value == "from") { cx.marked = "keyword"; return cont(expression); }
   }
   function arrayLiteral(type) {
     if (type == "]") return cont();
-    return pass(expressionNoComma, maybeArrayComprehension);
-  }
-  function maybeArrayComprehension(type) {
-    if (type == "for") return pass(comprehension, expect("]"));
-    if (type == ",") return cont(commasep(maybeexpressionNoComma, "]"));
     return pass(commasep(expressionNoComma, "]"));
   }
-  function comprehension(type) {
-    if (type == "for") return cont(forspec, comprehension);
-    if (type == "if") return cont(expression, comprehension);
-  }
 
   function isContinuedStatement(state, textAfter) {
     return state.lastType == "operator" || state.lastType == "," ||
       isOperatorChar.test(textAfter.charAt(0)) ||
       /[,.]/.test(textAfter.charAt(0));
   }
 
   // Interface
@@ -685,24 +751,28 @@ CodeMirror.defineMode("javascript", func
       if (type == "comment") return style;
       state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
       return parseJS(state, style, type, content, stream);
     },
 
     indent: function(state, textAfter) {
       if (state.tokenize == tokenComment) return CodeMirror.Pass;
       if (state.tokenize != tokenBase) return 0;
-      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical;
+      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
       // Kludge to prevent 'maybelse' from blocking lexical scope pops
       if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
         var c = state.cc[i];
         if (c == poplex) lexical = lexical.prev;
         else if (c != maybeelse) break;
       }
-      if (lexical.type == "stat" && firstChar == "}") lexical = lexical.prev;
+      while ((lexical.type == "stat" || lexical.type == "form") &&
+             (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
+                                   (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
+                                   !/^[,\.=+\-*:?[\(]/.test(textAfter))))
+        lexical = lexical.prev;
       if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
         lexical = lexical.prev;
       var type = lexical.type, closing = firstChar == type;
 
       if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0);
       else if (type == "form" && firstChar == "{") return lexical.indented;
       else if (type == "form") return lexical.indented + indentUnit;
       else if (type == "stat")
--- a/devtools/client/sourceeditor/test/codemirror/comment_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/comment_test.js
@@ -92,9 +92,23 @@ namespace = "comment_";
 
   test("dontMessWithStrings2", "javascript", function(cm) {
     cm.execCommand("toggleComment");
   }, "console.log(\"// string\");", "// console.log(\"// string\");");
 
   test("dontMessWithStrings3", "javascript", function(cm) {
     cm.execCommand("toggleComment");
   }, "// console.log(\"// string\");", "console.log(\"// string\");");
+
+  test("includeLastLine", "javascript", function(cm) {
+    cm.execCommand("selectAll")
+    cm.execCommand("toggleComment")
+  }, "// foo\n// bar\nbaz", "// // foo\n// // bar\n// baz")
+
+  test("uncommentWithTrailingBlockEnd", "xml", function(cm) {
+    cm.execCommand("toggleComment")
+  }, "<!-- foo --> -->", "foo -->")
+
+  test("dontCommentInComment", "xml", function(cm) {
+    cm.setCursor(1, 0)
+    cm.execCommand("toggleComment")
+  }, "<!-- foo\nbar -->", "<!-- foo\nbar -->")
 })();
--- a/devtools/client/sourceeditor/test/codemirror/doc_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/doc_test.js
@@ -158,23 +158,23 @@
     eqAll("ab\ncd\nefx", a, b);
     a.undo();
     eqAll("ab\ncd\nef", a, b);
   });
 
   testDoc("undoKeepRanges", "A='abcdefg' B<A", function(a, b) {
     var m = a.markText(Pos(0, 1), Pos(0, 3), {className: "foo"});
     b.replaceRange("x", Pos(0, 0));
-    eqPos(m.find().from, Pos(0, 2));
+    eqCharPos(m.find().from, Pos(0, 2));
     b.replaceRange("yzzy", Pos(0, 1), Pos(0));
     eq(m.find(), null);
     b.undo();
-    eqPos(m.find().from, Pos(0, 2));
+    eqCharPos(m.find().from, Pos(0, 2));
     b.undo();
-    eqPos(m.find().from, Pos(0, 1));
+    eqCharPos(m.find().from, Pos(0, 1));
   });
 
   testDoc("longChain", "A='uv' B<A C<B D<C", function(a, b, c, d) {
     a.replaceSelection("X");
     eqAll("Xuv", a, b, c, d);
     d.replaceRange("Y", Pos(0));
     eqAll("XuvY", a, b, c, d);
   });
@@ -266,22 +266,22 @@
     eq(a.getOption("mode"), "text/javascript");
     eq(a.getMode().name, "javascript");
   });
 
   testDoc("subview", "A='1\n2\n3\n4\n5' B<~A/1-3", function(a, b) {
     eq(b.getValue(), "2\n3");
     eq(b.firstLine(), 1);
     b.setCursor(Pos(4));
-    eqPos(b.getCursor(), Pos(2, 1));
+    eqCharPos(b.getCursor(), Pos(2, 1));
     a.replaceRange("-1\n0\n", Pos(0, 0));
     eq(b.firstLine(), 3);
-    eqPos(b.getCursor(), Pos(4, 1));
+    eqCharPos(b.getCursor(), Pos(4, 1));
     a.undo();
-    eqPos(b.getCursor(), Pos(2, 1));
+    eqCharPos(b.getCursor(), Pos(2, 1));
     b.replaceRange("oyoy\n", Pos(2, 0));
     eq(a.getValue(), "1\n2\noyoy\n3\n4\n5");
     b.undo();
     eq(a.getValue(), "1\n2\n3\n4\n5");
   });
 
   testDoc("subviewEditOnBoundary", "A='11\n22\n33\n44\n55' B<~A/1-4", function(a, b) {
     a.replaceRange("x\nyy\nz", Pos(0, 1), Pos(2, 1));
@@ -300,21 +300,21 @@
 
   testDoc("sharedMarker", "A='ab\ncd\nef\ngh' B<A C<~A/1-2", function(a, b, c) {
     var mark = b.markText(Pos(0, 1), Pos(3, 1),
                           {className: "cm-searching", shared: true});
     var found = a.findMarksAt(Pos(0, 2));
     eq(found.length, 1);
     eq(found[0], mark);
     eq(c.findMarksAt(Pos(1, 1)).length, 1);
-    eqPos(mark.find().from, Pos(0, 1));
-    eqPos(mark.find().to, Pos(3, 1));
+    eqCharPos(mark.find().from, Pos(0, 1));
+    eqCharPos(mark.find().to, Pos(3, 1));
     b.replaceRange("x\ny\n", Pos(0, 0));
-    eqPos(mark.find().from, Pos(2, 1));
-    eqPos(mark.find().to, Pos(5, 1));
+    eqCharPos(mark.find().from, Pos(2, 1));
+    eqCharPos(mark.find().to, Pos(5, 1));
     var cleared = 0;
     CodeMirror.on(mark, "clear", function() {++cleared;});
     b.operation(function(){mark.clear();});
     eq(a.findMarksAt(Pos(3, 1)).length, 0);
     eq(b.findMarksAt(Pos(3, 1)).length, 0);
     eq(c.findMarksAt(Pos(3, 1)).length, 0);
     eq(mark.find(), null);
     eq(cleared, 1);
@@ -344,19 +344,19 @@
   });
 
   testDoc("sharedBookmark", "A='ab\ncd\nef\ngh' B<A C<~A/1-2", function(a, b, c) {
     var mark = b.setBookmark(Pos(1, 1), {shared: true});
     var found = a.findMarksAt(Pos(1, 1));
     eq(found.length, 1);
     eq(found[0], mark);
     eq(c.findMarksAt(Pos(1, 1)).length, 1);
-    eqPos(mark.find(), Pos(1, 1));
+    eqCharPos(mark.find(), Pos(1, 1));
     b.replaceRange("x\ny\n", Pos(0, 0));
-    eqPos(mark.find(), Pos(3, 1));
+    eqCharPos(mark.find(), Pos(3, 1));
     var cleared = 0;
     CodeMirror.on(mark, "clear", function() {++cleared;});
     b.operation(function() {mark.clear();});
     eq(a.findMarks(Pos(0, 0), Pos(5)).length, 0);
     eq(b.findMarks(Pos(0, 0), Pos(5)).length, 0);
     eq(c.findMarks(Pos(0, 0), Pos(5)).length, 0);
     eq(mark.find(), null);
     eq(cleared, 1);
--- a/devtools/client/sourceeditor/test/codemirror/driver.js
+++ b/devtools/client/sourceeditor/test/codemirror/driver.js
@@ -101,23 +101,27 @@ function label(str, msg) {
 }
 function eq(a, b, msg) {
   if (a != b) throw new Failure(label(a + " != " + b, msg));
 }
 function near(a, b, margin, msg) {
   if (Math.abs(a - b) > margin)
     throw new Failure(label(a + " is not close to " + b + " (" + margin + ")", msg));
 }
-function eqPos(a, b, msg) {
-  function str(p) { return "{line:" + p.line + ",ch:" + p.ch + "}"; }
+function eqCharPos(a, b, msg) {
+  function str(p) { return "{line:" + p.line + ",ch:" + p.ch + ",sticky:" + p.sticky + "}"; }
   if (a == b) return;
   if (a == null) throw new Failure(label("comparing null to " + str(b), msg));
   if (b == null) throw new Failure(label("comparing " + str(a) + " to null", msg));
   if (a.line != b.line || a.ch != b.ch) throw new Failure(label(str(a) + " != " + str(b), msg));
 }
+function eqCursorPos(a, b, msg) {
+  eqCharPos(a, b, msg);
+  if (a) eq(a.sticky, b.sticky, msg ? msg + ' (sticky)' : 'sticky');
+}
 function is(a, msg) {
   if (!a) throw new Failure(label("assertion failed", msg));
 }
 
 function countTests() {
   if (!filters.length) return tests.length;
   var sum = 0;
   for (var i = 0; i < tests.length; ++i) {
--- a/devtools/client/sourceeditor/test/codemirror/emacs_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/emacs_test.js
@@ -34,35 +34,35 @@
         var cur = keys[i];
         if (cur instanceof Pos) cm.setCursor(cur);
         else if (cur.call) cur(cm);
         else cm.triggerOnKeyDown(fakeEvent(cur));
       }
     }, {keyMap: "emacs", value: start, mode: "javascript"});
   }
 
-  function at(line, ch) { return function(cm) { eqPos(cm.getCursor(), Pos(line, ch)); }; }
+  function at(line, ch, sticky) { return function(cm) { eqCursorPos(cm.getCursor(), Pos(line, ch, sticky)); }; }
   function txt(str) { return function(cm) { eq(cm.getValue(), str); }; }
 
-  sim("motionHSimple", "abc", "Ctrl-F", "Ctrl-F", "Ctrl-B", at(0, 1));
+  sim("motionHSimple", "abc", "Ctrl-F", "Ctrl-F", "Ctrl-B", at(0, 1, "after"));
   sim("motionHMulti", "abcde",
-      "Ctrl-4", "Ctrl-F", at(0, 4), "Ctrl--", "Ctrl-2", "Ctrl-F", at(0, 2),
-      "Ctrl-5", "Ctrl-B", at(0, 0));
+      "Ctrl-4", "Ctrl-F", at(0, 4, "before"), "Ctrl--", "Ctrl-2", "Ctrl-F", at(0, 2, "after"),
+      "Ctrl-5", "Ctrl-B", at(0, 0, "after"));
 
   sim("motionHWord", "abc. def ghi",
-      "Alt-F", at(0, 3), "Alt-F", at(0, 8),
-      "Ctrl-B", "Alt-B", at(0, 5), "Alt-B", at(0, 0));
+      "Alt-F", at(0, 3, "before"), "Alt-F", at(0, 8, "before"),
+      "Ctrl-B", "Alt-B", at(0, 5, "after"), "Alt-B", at(0, 0, "after"));
   sim("motionHWordMulti", "abc. def ghi ",
-      "Ctrl-3", "Alt-F", at(0, 12), "Ctrl-2", "Alt-B", at(0, 5),
-      "Ctrl--", "Alt-B", at(0, 8));
+      "Ctrl-3", "Alt-F", at(0, 12, "before"), "Ctrl-2", "Alt-B", at(0, 5, "after"),
+      "Ctrl--", "Alt-B", at(0, 8, "before"));
 
-  sim("motionVSimple", "a\nb\nc\n", "Ctrl-N", "Ctrl-N", "Ctrl-P", at(1, 0));
+  sim("motionVSimple", "a\nb\nc\n", "Ctrl-N", "Ctrl-N", "Ctrl-P", at(1, 0, "after"));
   sim("motionVMulti", "a\nb\nc\nd\ne\n",
-      "Ctrl-2", "Ctrl-N", at(2, 0), "Ctrl-F", "Ctrl--", "Ctrl-N", at(1, 1),
-      "Ctrl--", "Ctrl-3", "Ctrl-P", at(4, 1));
+      "Ctrl-2", "Ctrl-N", at(2, 0, "after"), "Ctrl-F", "Ctrl--", "Ctrl-N", at(1, 1, "before"),
+      "Ctrl--", "Ctrl-3", "Ctrl-P", at(4, 1, "before"));
 
   sim("killYank", "abc\ndef\nghi",
       "Ctrl-F", "Ctrl-Space", "Ctrl-N", "Ctrl-N", "Ctrl-W", "Ctrl-E", "Ctrl-Y",
       txt("ahibc\ndef\ng"));
   sim("killRing", "abcdef",
       "Ctrl-Space", "Ctrl-F", "Ctrl-W", "Ctrl-Space", "Ctrl-F", "Ctrl-W",
       "Ctrl-Y", "Alt-Y",
       txt("acdef"));
@@ -106,17 +106,17 @@
       Pos(0, 4), "Alt-Space", txt("hi b ye  "),
       "Ctrl-A", "Alt-Space", "Ctrl-E", "Alt-Space", txt(" hi b ye "));
 
   sim("openLine", "foo bar", "Alt-F", "Ctrl-O", txt("foo\n bar"))
 
   sim("transposeChar", "abcd\ne",
       "Ctrl-F", "Ctrl-T", "Ctrl-T", txt("bcad\ne"), at(0, 3),
       "Ctrl-F", "Ctrl-T", "Ctrl-T", "Ctrl-T", txt("bcda\ne"), at(0, 4),
-      "Ctrl-F", "Ctrl-T", txt("bcde\na"), at(1, 0));
+      "Ctrl-F", "Ctrl-T", txt("bcde\na"), at(1, 1));
 
   sim("manipWordCase", "foo BAR bAZ",
       "Alt-C", "Alt-L", "Alt-U", txt("Foo bar BAZ"),
       "Ctrl-A", "Alt-U", "Alt-L", "Alt-C", txt("FOO bar Baz"));
   sim("manipWordCaseMulti", "foo Bar bAz",
       "Ctrl-2", "Alt-U", txt("FOO BAR bAz"),
       "Ctrl-A", "Ctrl-3", "Alt-C", txt("Foo Bar Baz"));
 
--- a/devtools/client/sourceeditor/test/codemirror/mode/javascript/test.js
+++ b/devtools/client/sourceeditor/test/codemirror/mode/javascript/test.js
@@ -26,29 +26,48 @@
      "  [property constructor]() {}",
      "  [property sayName]() {",
      "    [keyword return] [string-2 `foo${][variable foo][string-2 }oo`];",
      "  }",
      "}");
 
   MT("class",
      "[keyword class] [def Point] [keyword extends] [variable SuperThing] {",
-     "  [property get] [property prop]() { [keyword return] [number 24]; }",
+     "  [keyword get] [property prop]() { [keyword return] [number 24]; }",
      "  [property constructor]([def x], [def y]) {",
      "    [keyword super]([string 'something']);",
      "    [keyword this].[property x] [operator =] [variable-2 x];",
      "  }",
      "}");
 
+  MT("anonymous_class_expression",
+     "[keyword const] [def Adder] [operator =] [keyword class] [keyword extends] [variable Arithmetic] {",
+     "  [property add]([def a], [def b]) {}",
+     "};");
+
+  MT("named_class_expression",
+     "[keyword const] [def Subber] [operator =] [keyword class] [def Subtract] {",
+     "  [property sub]([def a], [def b]) {}",
+     "};");
+
+  MT("class_async_method",
+     "[keyword class] [def Foo] {",
+     "  [property sayName1]() {}",
+     "  [keyword async] [property sayName2]() {}",
+     "}");
+
   MT("import",
      "[keyword function] [def foo]() {",
      "  [keyword import] [def $] [keyword from] [string 'jquery'];",
      "  [keyword import] { [def encrypt], [def decrypt] } [keyword from] [string 'crypto'];",
      "}");
 
+  MT("import_trailing_comma",
+     "[keyword import] {[def foo], [def bar],} [keyword from] [string 'baz']")
+
   MT("const",
      "[keyword function] [def f]() {",
      "  [keyword const] [[ [def a], [def b] ]] [operator =] [[ [number 1], [number 2] ]];",
      "}");
 
   MT("for/of",
      "[keyword for]([keyword let] [def of] [keyword of] [variable something]) {}");
 
@@ -70,22 +89,16 @@
      "[keyword let] [def f] [operator =] ([[ [def a], [def b] ]], [def c]) [operator =>] [variable-2 a] [operator +] [variable-2 c];",
      "[variable c];");
 
   MT("spread",
      "[keyword function] [def f]([def a], [meta ...][def b]) {",
      "  [variable something]([variable-2 a], [meta ...][variable-2 b]);",
      "}");
 
-  MT("comprehension",
-     "[keyword function] [def f]() {",
-     "  [[([variable x] [operator +] [number 1]) [keyword for] ([keyword var] [def x] [keyword in] [variable y]) [keyword if] [variable pred]([variable-2 x]) ]];",
-     "  ([variable u] [keyword for] ([keyword var] [def u] [keyword of] [variable generateValues]()) [keyword if] ([variable-2 u].[property color] [operator ===] [string 'blue']));",
-     "}");
-
   MT("quasi",
      "[variable re][string-2 `fofdlakj${][variable x] [operator +] ([variable re][string-2 `foo`]) [operator +] [number 1][string-2 }fdsa`] [operator +] [number 2]");
 
   MT("quasi_no_function",
      "[variable x] [operator =] [string-2 `fofdlakj${][variable x] [operator +] [string-2 `foo`] [operator +] [number 1][string-2 }fdsa`] [operator +] [number 2]");
 
   MT("indent_statement",
      "[keyword var] [def x] [operator =] [number 10]",
@@ -138,16 +151,29 @@
      "};");
 
   MT("indent_below_if",
      "[keyword for] (;;)",
      "  [keyword if] ([variable foo])",
      "    [number 1];",
      "[number 2];");
 
+  MT("indent_semicolonless_if",
+     "[keyword function] [def foo]() {",
+     "  [keyword if] ([variable x])",
+     "    [variable foo]()",
+     "}")
+
+  MT("indent_semicolonless_if_with_statement",
+     "[keyword function] [def foo]() {",
+     "  [keyword if] ([variable x])",
+     "    [variable foo]()",
+     "  [variable bar]()",
+     "}")
+
   MT("multilinestring",
      "[keyword var] [def x] [operator =] [string 'foo\\]",
      "[string bar'];");
 
   MT("scary_regexp",
      "[string-2 /foo[[/]]bar/];");
 
   MT("indent_strange_array",
@@ -165,16 +191,159 @@
   MT("new_target",
      "[keyword function] [def F]([def target]) {",
      "  [keyword if] ([variable-2 target] [operator &&] [keyword new].[keyword target].[property name]) {",
      "    [keyword return] [keyword new]",
      "      .[keyword target];",
      "  }",
      "}");
 
+  MT("async",
+     "[keyword async] [keyword function] [def foo]([def args]) { [keyword return] [atom true]; }");
+
+  MT("async_assignment",
+     "[keyword const] [def foo] [operator =] [keyword async] [keyword function] ([def args]) { [keyword return] [atom true]; };");
+
+  MT("async_object",
+     "[keyword let] [def obj] [operator =] { [property async]: [atom false] };");
+
+  // async be highlighet as keyword and foo as def, but it requires potentially expensive look-ahead. See #4173
+  MT("async_object_function",
+     "[keyword let] [def obj] [operator =] { [property async] [property foo]([def args]) { [keyword return] [atom true]; } };");
+
+  MT("async_object_properties",
+     "[keyword let] [def obj] [operator =] {",
+     "  [property prop1]: [keyword async] [keyword function] ([def args]) { [keyword return] [atom true]; },",
+     "  [property prop2]: [keyword async] [keyword function] ([def args]) { [keyword return] [atom true]; },",
+     "  [property prop3]: [keyword async] [keyword function] [def prop3]([def args]) { [keyword return] [atom true]; },",
+     "};");
+
+  MT("async_arrow",
+     "[keyword const] [def foo] [operator =] [keyword async] ([def args]) [operator =>] { [keyword return] [atom true]; };");
+
+  MT("async_jquery",
+     "[variable $].[property ajax]({",
+     "  [property url]: [variable url],",
+     "  [property async]: [atom true],",
+     "  [property method]: [string 'GET']",
+     "});");
+
+  MT("async_variable",
+     "[keyword const] [def async] [operator =] {[property a]: [number 1]};",
+     "[keyword const] [def foo] [operator =] [string-2 `bar ${][variable async].[property a][string-2 }`];")
+
+  MT("indent_switch",
+     "[keyword switch] ([variable x]) {",
+     "  [keyword default]:",
+     "    [keyword return] [number 2]",
+     "}")
+
+  var ts_mode = CodeMirror.getMode({indentUnit: 2}, "application/typescript")
+  function TS(name) {
+    test.mode(name, ts_mode, Array.prototype.slice.call(arguments, 1))
+  }
+
+  TS("typescript_extend_type",
+     "[keyword class] [def Foo] [keyword extends] [type Some][operator <][type Type][operator >] {}")
+
+  TS("typescript_arrow_type",
+     "[keyword let] [def x]: ([variable arg]: [type Type]) [operator =>] [type ReturnType]")
+
+  TS("typescript_class",
+     "[keyword class] [def Foo] {",
+     "  [keyword public] [keyword static] [property main]() {}",
+     "  [keyword private] [property _foo]: [type string];",
+     "}")
+
+  TS("typescript_literal_types",
+     "[keyword import] [keyword *] [keyword as] [def Sequelize] [keyword from] [string 'sequelize'];",
+     "[keyword interface] [def MyAttributes] {",
+     "  [property truthy]: [string 'true'] [operator |] [number 1] [operator |] [atom true];",
+     "  [property falsy]: [string 'false'] [operator |] [number 0] [operator |] [atom false];",
+     "}",
+     "[keyword interface] [def MyInstance] [keyword extends] [type Sequelize].[type Instance] [operator <] [type MyAttributes] [operator >] {",
+     "  [property rawAttributes]: [type MyAttributes];",
+     "  [property truthy]: [string 'true'] [operator |] [number 1] [operator |] [atom true];",
+     "  [property falsy]: [string 'false'] [operator |] [number 0] [operator |] [atom false];",
+     "}")
+
+  TS("typescript_extend_operators",
+     "[keyword export] [keyword interface] [def UserModel] [keyword extends]",
+     "  [type Sequelize].[type Model] [operator <] [type UserInstance], [type UserAttributes] [operator >] {",
+     "    [property findById]: (",
+     "    [variable userId]: [type number]",
+     "    ) [operator =>] [type Promise] [operator <] [type Array] [operator <] { [property id], [property name] } [operator >>];",
+     "    [property updateById]: (",
+     "    [variable userId]: [type number],",
+     "    [variable isActive]: [type boolean]",
+     "    ) [operator =>] [type Promise] [operator <] [type AccountHolderNotificationPreferenceInstance] [operator >];",
+     "  }")
+
+  TS("typescript_interface_with_const",
+     "[keyword const] [def hello]: {",
+     "  [property prop1][operator ?]: [type string];",
+     "  [property prop2][operator ?]: [type string];",
+     "} [operator =] {};")
+
+  TS("typescript_double_extend",
+     "[keyword export] [keyword interface] [def UserAttributes] {",
+     "  [property id][operator ?]: [type number];",
+     "  [property createdAt][operator ?]: [type Date];",
+     "}",
+     "[keyword export] [keyword interface] [def UserInstance] [keyword extends] [type Sequelize].[type Instance][operator <][type UserAttributes][operator >], [type UserAttributes] {",
+     "  [property id]: [type number];",
+     "  [property createdAt]: [type Date];",
+     "}");
+
+  TS("typescript_index_signature",
+     "[keyword interface] [def A] {",
+     "  [[ [variable prop]: [type string] ]]: [type any];",
+     "  [property prop1]: [type any];",
+     "}");
+
+  TS("typescript_generic_class",
+     "[keyword class] [def Foo][operator <][type T][operator >] {",
+     "  [property bar]() {}",
+     "  [property foo](): [type Foo] {}",
+     "}")
+
+  TS("typescript_type_when_keyword",
+     "[keyword export] [keyword type] [type AB] [operator =] [type A] [operator |] [type B];",
+     "[keyword type] [type Flags] [operator =] {",
+     "  [property p1]: [type string];",
+     "  [property p2]: [type boolean];",
+     "};")
+
+  TS("typescript_type_when_not_keyword",
+     "[keyword class] [def HasType] {",
+     "  [property type]: [type string];",
+     "  [property constructor]([def type]: [type string]) {",
+     "    [keyword this].[property type] [operator =] [variable-2 type];",
+     "  }",
+     "  [property setType]({ [def type] }: { [property type]: [type string]; }) {",
+     "    [keyword this].[property type] [operator =] [variable-2 type];",
+     "  }",
+     "}")
+
+  TS("typescript_function_generics",
+     "[keyword function] [def a]() {}",
+     "[keyword function] [def b][operator <][type IA] [keyword extends] [type object], [type IB] [keyword extends] [type object][operator >]() {}",
+     "[keyword function] [def c]() {}")
+
+  TS("typescript_complex_return_type",
+     "[keyword function] [def A]() {",
+     "  [keyword return] [keyword this].[property property];",
+     "}",
+     "[keyword function] [def B](): [type Promise][operator <]{ [[ [variable key]: [type string] ]]: [type any] } [operator |] [atom null][operator >] {",
+     "  [keyword return] [keyword this].[property property];",
+     "}")
+
+  TS("typescript_complex_type_casting",
+     "[keyword const] [def giftpay] [operator =] [variable config].[property get]([string 'giftpay']) [keyword as] { [[ [variable platformUuid]: [type string] ]]: { [property version]: [type number]; [property apiCode]: [type string]; } };")
+
   var jsonld_mode = CodeMirror.getMode(
     {indentUnit: 2},
     {name: "javascript", jsonld: true}
   );
   function LD(name) {
     test.mode(name, jsonld_mode, Array.prototype.slice.call(arguments, 1));
   }
 
--- a/devtools/client/sourceeditor/test/codemirror/mode_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/mode_test.js
@@ -63,17 +63,16 @@
     var data = parseTokens(tokens);
     return test((modeName || mode.name) + "_" + name, function() {
       return compare(data.plain, data.tokens, mode);
     });
   };
 
   function esc(str) {
     return str.replace('&', '&amp;').replace('<', '&lt;').replace(/>/g, "&gt;").replace(/"/g, "&quot;").replace(/'/g, "&#039;");
-;
   }
 
   function compare(text, expected, mode) {
 
     var expectedOutput = [];
     for (var i = 0; i < expected.length; ++i) {
       var sty = expected[i].style;
       if (sty && sty.indexOf(" ")) sty = sty.split(' ').sort().join(' ');
--- a/devtools/client/sourceeditor/test/codemirror/multi_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/multi_test.js
@@ -4,29 +4,29 @@
   function hasSelections(cm) {
     var sels = cm.listSelections();
     var given = (arguments.length - 1) / 4;
     if (sels.length != given)
       throw new Failure("expected " + given + " selections, found " + sels.length);
     for (var i = 0, p = 1; i < given; i++, p += 4) {
       var anchor = Pos(arguments[p], arguments[p + 1]);
       var head = Pos(arguments[p + 2], arguments[p + 3]);
-      eqPos(sels[i].anchor, anchor, "anchor of selection " + i);
-      eqPos(sels[i].head, head, "head of selection " + i);
+      eqCharPos(sels[i].anchor, anchor, "anchor of selection " + i);
+      eqCharPos(sels[i].head, head, "head of selection " + i);
     }
   }
   function hasCursors(cm) {
     var sels = cm.listSelections();
     var given = (arguments.length - 1) / 2;
     if (sels.length != given)
       throw new Failure("expected " + given + " selections, found " + sels.length);
     for (var i = 0, p = 1; i < given; i++, p += 2) {
-      eqPos(sels[i].anchor, sels[i].head, "something selected for " + i);
+      eqCursorPos(sels[i].anchor, sels[i].head, "something selected for " + i);
       var head = Pos(arguments[p], arguments[p + 1]);
-      eqPos(sels[i].head, head, "selection " + i);
+      eqCharPos(sels[i].head, head, "selection " + i);
     }
   }
 
   testCM("getSelection", function(cm) {
     select(cm, {anchor: Pos(0, 0), head: Pos(1, 2)}, {anchor: Pos(2, 2), head: Pos(2, 0)});
     eq(cm.getSelection(), "1234\n56\n90");
     eq(cm.getSelection(false).join("|"), "1234|56|90");
     eq(cm.getSelections().join("|"), "1234\n56|90");
@@ -42,20 +42,20 @@
     select(cm, {anchor: Pos(1, 1), head: Pos(2, 4)},
            {anchor: Pos(0, 0), head: Pos(1, 3)},
            Pos(3, 0), Pos(2, 2));
     hasSelections(cm, 0, 0, 2, 4,
                   3, 0, 3, 0);
     cm.setSelections([{anchor: Pos(0, 1), head: Pos(0, 2)},
                       {anchor: Pos(1, 1), head: Pos(1, 2)},
                       {anchor: Pos(2, 1), head: Pos(2, 2)}], 1);
-    eqPos(cm.getCursor("head"), Pos(1, 2));
-    eqPos(cm.getCursor("anchor"), Pos(1, 1));
-    eqPos(cm.getCursor("from"), Pos(1, 1));
-    eqPos(cm.getCursor("to"), Pos(1, 2));
+    eqCharPos(cm.getCursor("head"), Pos(1, 2));
+    eqCharPos(cm.getCursor("anchor"), Pos(1, 1));
+    eqCharPos(cm.getCursor("from"), Pos(1, 1));
+    eqCharPos(cm.getCursor("to"), Pos(1, 2));
     cm.setCursor(Pos(1, 1));
     hasCursors(cm, 1, 1);
   }, {value: "abcde\nabcde\nabcde\n"});
 
   testCM("somethingSelected", function(cm) {
     select(cm, Pos(0, 1), {anchor: Pos(0, 3), head: Pos(0, 5)});
     eq(cm.somethingSelected(), true);
     select(cm, Pos(0, 1), Pos(0, 3), Pos(0, 5));
@@ -269,17 +269,17 @@
     for (var i = 0; i < 3; ++i)
       cm.addSelection(Pos(0, i * 2), Pos(0, i * 2 + 1));
     cm.execCommand("undoSelection");
     eq(cm.getSelection(), "1\n2");
     cm.execCommand("undoSelection");
     eq(cm.getSelection(), "1");
     cm.execCommand("undoSelection");
     eq(cm.getSelection(), "");
-    eqPos(cm.getCursor(), Pos(0, 0));
+    eqCharPos(cm.getCursor(), Pos(0, 0));
     cm.execCommand("redoSelection");
     eq(cm.getSelection(), "1");
     cm.execCommand("redoSelection");
     eq(cm.getSelection(), "1\n2");
     cm.execCommand("redoSelection");
     eq(cm.getSelection(), "1\n2\n3");
   }, {value: "1 2 3"});
 })();
--- a/devtools/client/sourceeditor/test/codemirror/search_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/search_test.js
@@ -1,62 +1,77 @@
 (function() {
   "use strict";
 
-  function test(name) {
-    var text = Array.prototype.slice.call(arguments, 1, arguments.length - 1).join("\n");
-    var body = arguments[arguments.length - 1];
-    return window.test("search_" + name, function() {
-      body(new CodeMirror.Doc(text));
-    });
-  }
-
-  function run(doc, query, insensitive) {
-    var cursor = doc.getSearchCursor(query, null, insensitive);
+  function run(doc, query, options) {
+    var cursor = doc.getSearchCursor(query, null, options);
     for (var i = 3; i < arguments.length; i += 4) {
       var found = cursor.findNext();
       is(found, "not enough results (forward)");
-      eqPos(Pos(arguments[i], arguments[i + 1]), cursor.from(), "from, forward, " + (i - 3) / 4);
-      eqPos(Pos(arguments[i + 2], arguments[i + 3]), cursor.to(), "to, forward, " + (i - 3) / 4);
+      eqCharPos(Pos(arguments[i], arguments[i + 1]), cursor.from(), "from, forward, " + (i - 3) / 4);
+      eqCharPos(Pos(arguments[i + 2], arguments[i + 3]), cursor.to(), "to, forward, " + (i - 3) / 4);
     }
     is(!cursor.findNext(), "too many matches (forward)");
     for (var i = arguments.length - 4; i >= 3; i -= 4) {
       var found = cursor.findPrevious();
       is(found, "not enough results (backwards)");
-      eqPos(Pos(arguments[i], arguments[i + 1]), cursor.from(), "from, backwards, " + (i - 3) / 4);
-      eqPos(Pos(arguments[i + 2], arguments[i + 3]), cursor.to(), "to, backwards, " + (i - 3) / 4);
+      eqCharPos(Pos(arguments[i], arguments[i + 1]), cursor.from(), "from, backwards, " + (i - 3) / 4);
+      eqCharPos(Pos(arguments[i + 2], arguments[i + 3]), cursor.to(), "to, backwards, " + (i - 3) / 4);
     }
     is(!cursor.findPrevious(), "too many matches (backwards)");
   }
 
-  test("simple", "abcdefg", "abcdefg", function(doc) {
+  function test(name, f) { window.test("search_" + name, f) }
+
+  test("simple", function() {
+    var doc = new CodeMirror.Doc("abcdefg\nabcdefg")
     run(doc, "cde", false, 0, 2, 0, 5, 1, 2, 1, 5);
   });
 
-  test("multiline", "hallo", "goodbye", function(doc) {
-    run(doc, "llo\ngoo", false, 0, 2, 1, 3);
-    run(doc, "blah\nhall", false);
-    run(doc, "bye\neye", false);
+  test("multiline", function() {
+    var doc = new CodeMirror.Doc("hallo\na\nb\ngoodbye")
+    run(doc, "llo\na\nb\ngoo", false, 0, 2, 3, 3);
+    run(doc, "blah\na\nb\nhall", false);
+    run(doc, "bye\nx\neye", false);
   });
 
-  test("regexp", "abcde", "abcde", function(doc) {
+  test("regexp", function() {
+    var doc = new CodeMirror.Doc("abcde\nabcde")
     run(doc, /bcd/, false, 0, 1, 0, 4, 1, 1, 1, 4);
     run(doc, /BCD/, false);
     run(doc, /BCD/i, false, 0, 1, 0, 4, 1, 1, 1, 4);
   });
 
-  test("insensitive", "hallo", "HALLO", "oink", "hAllO", function(doc) {
+  test("regexpMultiline", function() {
+    var doc = new CodeMirror.Doc("foo foo\nbar\nbaz")
+    run(doc, /fo[^]*az/, {multiline: true}, 0, 0, 2, 3)
+    run(doc, /[oa][^u]/, {multiline: true}, 0, 1, 0, 3, 0, 5, 0, 7, 1, 1, 1, 3, 2, 1, 2, 3)
+    run(doc, /[a][^u]{2}/, {multiline: true}, 1, 1, 2, 0)
+  })
+
+  test("insensitive", function() {
+    var doc = new CodeMirror.Doc("hallo\nHALLO\noink\nhAllO")
     run(doc, "All", false, 3, 1, 3, 4);
     run(doc, "All", true, 0, 1, 0, 4, 1, 1, 1, 4, 3, 1, 3, 4);
   });
 
-  test("multilineInsensitive", "zie ginds komT", "De Stoomboot", "uit Spanje weer aan", function(doc) {
+  test("multilineInsensitive", function() {
+    var doc = new CodeMirror.Doc("zie ginds komT\nDe Stoomboot\nuit Spanje weer aan")
     run(doc, "komt\nde stoomboot\nuit", false);
-    run(doc, "komt\nde stoomboot\nuit", true, 0, 10, 2, 3);
-    run(doc, "kOMt\ndE stOOmboot\nuiT", true, 0, 10, 2, 3);
+    run(doc, "komt\nde stoomboot\nuit", {caseFold: true}, 0, 10, 2, 3);
+    run(doc, "kOMt\ndE stOOmboot\nuiT", {caseFold: true}, 0, 10, 2, 3);
   });
 
-  test("expandingCaseFold", "<b>İİ İİ</b>", "<b>uu uu</b>", function(doc) {
-    if (phantom) return; // A Phantom bug makes this hang
+  test("multilineInsensitiveSlow", function() {
+    var text = ""
+    for (var i = 0; i < 1000; i++) text += "foo\nbar\n"
+    var doc = new CodeMirror.Doc("find\nme\n" + text + "find\nme\n")
+    var t0 = +new Date
+    run(doc, /find\nme/, {multiline: true}, 0, 0, 1, 2, 2002, 0, 2003, 2)
+    is(+new Date - t0 < 100)
+  })
+
+  test("expandingCaseFold", function() {
+    var doc = new CodeMirror.Doc("<b>İİ İİ</b>\n<b>uu uu</b>")
     run(doc, "</b>", true, 0, 8, 0, 12, 1, 8, 1, 12);
     run(doc, "İİ", true, 0, 3, 0, 5, 0, 6, 0, 8);
   });
 })();
--- a/devtools/client/sourceeditor/test/codemirror/sublime_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/sublime_test.js
@@ -19,18 +19,18 @@
           action(cm);
       }
     });
   }
 
   function at(line, ch, msg) {
     return function(cm) {
       eq(cm.listSelections().length, 1);
-      eqPos(cm.getCursor("head"), Pos(line, ch), msg);
-      eqPos(cm.getCursor("anchor"), Pos(line, ch), msg);
+      eqCursorPos(cm.getCursor("head"), Pos(line, ch), msg);
+      eqCursorPos(cm.getCursor("anchor"), Pos(line, ch), msg);
     };
   }
 
   function val(content, msg) {
     return function(cm) { eq(cm.getValue(), content, msg); };
   }
 
   function argsToRanges(args) {
@@ -49,18 +49,18 @@
 
   function hasSel() {
     var ranges = argsToRanges(arguments);
     return function(cm) {
       var sels = cm.listSelections();
       if (sels.length != ranges.length)
         throw new Failure("Expected " + ranges.length + " selections, but found " + sels.length);
       for (var i = 0; i < sels.length; i++) {
-        eqPos(sels[i].anchor, ranges[i].anchor, "anchor " + i);
-        eqPos(sels[i].head, ranges[i].head, "head " + i);
+        eqCharPos(sels[i].anchor, ranges[i].anchor, "anchor " + i);
+        eqCharPos(sels[i].head, ranges[i].head, "head " + i);
       }
     };
   }
 
   stTest("bySubword", "the foo_bar DooDahBah \n a",
          "goSubwordLeft", at(0, 0),
          "goSubwordRight", at(0, 3),
          "goSubwordRight", at(0, 7),
@@ -244,21 +244,21 @@
                 2, 3, 2, 3,
                 3, 0, 3, 0));
 
   stTest("sortLines", "c\nb\na\nC\nB\nA",
          "sortLines", val("A\nB\nC\na\nb\nc"),
          "undo",
          setSel(0, 0, 2, 0,
                 3, 0, 5, 0),
-         "sortLines", val("a\nb\nc\nA\nB\nC"),
-         hasSel(0, 0, 2, 1,
-                3, 0, 5, 1),
+         "sortLines", val("b\nc\na\nB\nC\nA"),
+         hasSel(0, 0, 2, 0,
+                3, 0, 5, 0),
          "undo",
-         setSel(1, 0, 4, 0), "sortLinesInsensitive", val("c\na\nB\nb\nC\nA"));
+         setSel(1, 0, 5, 0), "sortLinesInsensitive", val("c\na\nB\nb\nC\nA"));
 
   stTest("bookmarks", "abc\ndef\nghi\njkl",
          Pos(0, 1), "toggleBookmark",
          setSel(1, 1, 1, 2), "toggleBookmark",
          setSel(2, 1, 2, 2), "toggleBookmark",
          "nextBookmark", hasSel(0, 1, 0, 1),
          "nextBookmark", hasSel(1, 1, 1, 2),
          "nextBookmark", hasSel(2, 1, 2, 2),
--- a/devtools/client/sourceeditor/test/codemirror/test.js
+++ b/devtools/client/sourceeditor/test/codemirror/test.js
@@ -77,69 +77,69 @@ testCM("replaceRange", function(cm) {
   eq(cm.getValue(), "abc");
   eq(cm.lineCount(), 1);
 });
 
 testCM("selection", function(cm) {
   cm.setSelection(Pos(0, 4), Pos(2, 2));
   is(cm.somethingSelected());
   eq(cm.getSelection(), "11\n222222\n33");
-  eqPos(cm.getCursor(false), Pos(2, 2));
-  eqPos(cm.getCursor(true), Pos(0, 4));
+  eqCursorPos(cm.getCursor(false), Pos(2, 2));
+  eqCursorPos(cm.getCursor(true), Pos(0, 4));
   cm.setSelection(Pos(1, 0));
   is(!cm.somethingSelected());
   eq(cm.getSelection(), "");
-  eqPos(cm.getCursor(true), Pos(1, 0));
+  eqCursorPos(cm.getCursor(true), Pos(1, 0));
   cm.replaceSelection("abc", "around");
   eq(cm.getSelection(), "abc");
   eq(cm.getValue(), "111111\nabc222222\n333333");
   cm.replaceSelection("def", "end");
   eq(cm.getSelection(), "");
-  eqPos(cm.getCursor(true), Pos(1, 3));
+  eqCursorPos(cm.getCursor(true), Pos(1, 3));
   cm.setCursor(Pos(2, 1));
-  eqPos(cm.getCursor(true), Pos(2, 1));
+  eqCursorPos(cm.getCursor(true), Pos(2, 1));
   cm.setCursor(1, 2);
-  eqPos(cm.getCursor(true), Pos(1, 2));
+  eqCursorPos(cm.getCursor(true), Pos(1, 2));
 }, {value: "111111\n222222\n333333"});
 
 testCM("extendSelection", function(cm) {
   cm.setExtending(true);
   addDoc(cm, 10, 10);
   cm.setSelection(Pos(3, 5));
-  eqPos(cm.getCursor("head"), Pos(3, 5));
-  eqPos(cm.getCursor("anchor"), Pos(3, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(3, 5));
+  eqCursorPos(cm.getCursor("anchor"), Pos(3, 5));
   cm.setSelection(Pos(2, 5), Pos(5, 5));
-  eqPos(cm.getCursor("head"), Pos(5, 5));
-  eqPos(cm.getCursor("anchor"), Pos(2, 5));
-  eqPos(cm.getCursor("start"), Pos(2, 5));
-  eqPos(cm.getCursor("end"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("anchor"), Pos(2, 5));
+  eqCursorPos(cm.getCursor("start"), Pos(2, 5));
+  eqCursorPos(cm.getCursor("end"), Pos(5, 5));
   cm.setSelection(Pos(5, 5), Pos(2, 5));
-  eqPos(cm.getCursor("head"), Pos(2, 5));
-  eqPos(cm.getCursor("anchor"), Pos(5, 5));
-  eqPos(cm.getCursor("start"), Pos(2, 5));
-  eqPos(cm.getCursor("end"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(2, 5));
+  eqCursorPos(cm.getCursor("anchor"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("start"), Pos(2, 5));
+  eqCursorPos(cm.getCursor("end"), Pos(5, 5));
   cm.extendSelection(Pos(3, 2));
-  eqPos(cm.getCursor("head"), Pos(3, 2));
-  eqPos(cm.getCursor("anchor"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(3, 2));
+  eqCursorPos(cm.getCursor("anchor"), Pos(5, 5));
   cm.extendSelection(Pos(6, 2));
-  eqPos(cm.getCursor("head"), Pos(6, 2));
-  eqPos(cm.getCursor("anchor"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(6, 2));
+  eqCursorPos(cm.getCursor("anchor"), Pos(5, 5));
   cm.extendSelection(Pos(6, 3), Pos(6, 4));
-  eqPos(cm.getCursor("head"), Pos(6, 4));
-  eqPos(cm.getCursor("anchor"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(6, 4));
+  eqCursorPos(cm.getCursor("anchor"), Pos(5, 5));
   cm.extendSelection(Pos(0, 3), Pos(0, 4));
-  eqPos(cm.getCursor("head"), Pos(0, 3));
-  eqPos(cm.getCursor("anchor"), Pos(5, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(0, 3));
+  eqCursorPos(cm.getCursor("anchor"), Pos(5, 5));
   cm.extendSelection(Pos(4, 5), Pos(6, 5));
-  eqPos(cm.getCursor("head"), Pos(6, 5));
-  eqPos(cm.getCursor("anchor"), Pos(4, 5));
+  eqCursorPos(cm.getCursor("head"), Pos(6, 5));
+  eqCursorPos(cm.getCursor("anchor"), Pos(4, 5));
   cm.setExtending(false);
   cm.extendSelection(Pos(0, 3), Pos(0, 4));
-  eqPos(cm.getCursor("head"), Pos(0, 3));
-  eqPos(cm.getCursor("anchor"), Pos(0, 4));
+  eqCursorPos(cm.getCursor("head"), Pos(0, 3));
+  eqCursorPos(cm.getCursor("anchor"), Pos(0, 4));
 });
 
 testCM("lines", function(cm) {
   eq(cm.getLine(0), "111111");
   eq(cm.getLine(1), "222222");
   eq(cm.getLine(-1), null);
   cm.replaceRange("", Pos(1, 0), Pos(2, 0))
   cm.replaceRange("abc", Pos(1, 0), Pos(1));
@@ -226,17 +226,34 @@ testCM("coordsChar", function(cm) {
   addDoc(cm, 35, 70);
   for (var i = 0; i < 2; ++i) {
     var sys = i ? "local" : "page";
     for (var ch = 0; ch <= 35; ch += 5) {
       for (var line = 0; line < 70; line += 5) {
         cm.setCursor(line, ch);
         var coords = cm.charCoords(Pos(line, ch), sys);
         var pos = cm.coordsChar({left: coords.left + 1, top: coords.top + 1}, sys);
-        eqPos(pos, Pos(line, ch));
+        eqCharPos(pos, Pos(line, ch));
+      }
+    }
+  }
+}, {lineNumbers: true});
+
+testCM("coordsCharBidi", function(cm) {
+  addDoc(cm, 35, 70);
+  // Put an rtl character into each line to trigger the bidi code path in coordsChar
+  cm.setValue(cm.getValue().replace(/\bx/g, 'و'))
+  for (var i = 0; i < 2; ++i) {
+    var sys = i ? "local" : "page";
+    for (var ch = 2; ch <= 35; ch += 5) {
+      for (var line = 0; line < 70; line += 5) {
+        cm.setCursor(line, ch);
+        var coords = cm.charCoords(Pos(line, ch), sys);
+        var pos = cm.coordsChar({left: coords.left + 1, top: coords.top + 1}, sys);
+        eqCharPos(pos, Pos(line, ch));
       }
     }
   }
 }, {lineNumbers: true});
 
 testCM("posFromIndex", function(cm) {
   cm.setValue(
     "This function should\n" +
@@ -339,22 +356,22 @@ testCM("undoComposite", function(cm) {
   eq(cm.getValue(), "ax\nby\ncz\n");
 }, {value: "a\nb\nc\n"});
 
 testCM("undoSelection", function(cm) {
   cm.setSelection(Pos(0, 2), Pos(0, 4));
   cm.replaceSelection("");
   cm.setCursor(Pos(1, 0));
   cm.undo();
-  eqPos(cm.getCursor(true), Pos(0, 2));
-  eqPos(cm.getCursor(false), Pos(0, 4));
+  eqCursorPos(cm.getCursor(true), Pos(0, 2));
+  eqCursorPos(cm.getCursor(false), Pos(0, 4));
   cm.setCursor(Pos(1, 0));
   cm.redo();
-  eqPos(cm.getCursor(true), Pos(0, 2));
-  eqPos(cm.getCursor(false), Pos(0, 2));
+  eqCursorPos(cm.getCursor(true), Pos(0, 2));
+  eqCursorPos(cm.getCursor(false), Pos(0, 2));
 }, {value: "abcdefgh\n"});
 
 testCM("undoSelectionAsBefore", function(cm) {
   cm.replaceSelection("abc", "around");
   cm.undo();
   cm.redo();
   eq(cm.getSelection(), "abc");
 });
@@ -408,17 +425,17 @@ testCM("markTextMultiLine", function(cm)
            {a: [2, 5], b: [3, 0], c: "a\nb", f: [0, 5], t: [2, 5]},
            {a: [2, 3], b: [3, 0], c: "x", f: [0, 5], t: [2, 3]},
            {a: [1, 1], b: [1, 9], c: "1\n2\n3", f: [0, 5], t: [4, 5]}], function(test) {
     cm.setValue("aaaaaaaaaa\nbbbbbbbbbb\ncccccccccc\ndddddddd\n");
     var r = cm.markText(Pos(0, 5), Pos(2, 5),
                         {className: "CodeMirror-matchingbracket"});
     cm.replaceRange(test.c, p(test.a), p(test.b));
     var f = r.find();
-    eqPos(f && f.from, p(test.f)); eqPos(f && f.to, p(test.t));
+    eqCursorPos(f && f.from, p(test.f)); eqCursorPos(f && f.to, p(test.t));
   });
 });
 
 testCM("markTextUndo", function(cm) {
   var marker1, marker2, bookmark;
   marker1 = cm.markText(Pos(0, 1), Pos(0, 3),
                         {className: "CodeMirror-matchingbracket"});
   marker2 = cm.markText(Pos(0, 0), Pos(2, 1),
@@ -427,26 +444,26 @@ testCM("markTextUndo", function(cm) {
   cm.operation(function(){
     cm.replaceRange("foo", Pos(0, 2));
     cm.replaceRange("bar\nbaz\nbug\n", Pos(2, 0), Pos(3, 0));
   });
   var v1 = cm.getValue();
   cm.setValue("");
   eq(marker1.find(), null); eq(marker2.find(), null); eq(bookmark.find(), null);
   cm.undo();
-  eqPos(bookmark.find(), Pos(1, 5), "still there");
+  eqCursorPos(bookmark.find(), Pos(1, 5), "still there");
   cm.undo();
   var m1Pos = marker1.find(), m2Pos = marker2.find();
-  eqPos(m1Pos.from, Pos(0, 1)); eqPos(m1Pos.to, Pos(0, 3));
-  eqPos(m2Pos.from, Pos(0, 0)); eqPos(m2Pos.to, Pos(2, 1));
-  eqPos(bookmark.find(), Pos(1, 5));
+  eqCursorPos(m1Pos.from, Pos(0, 1)); eqCursorPos(m1Pos.to, Pos(0, 3));
+  eqCursorPos(m2Pos.from, Pos(0, 0)); eqCursorPos(m2Pos.to, Pos(2, 1));
+  eqCursorPos(bookmark.find(), Pos(1, 5));
   cm.redo(); cm.redo();
   eq(bookmark.find(), null);
   cm.undo();
-  eqPos(bookmark.find(), Pos(1, 5));
+  eqCursorPos(bookmark.find(), Pos(1, 5));
   eq(cm.getValue(), v1);
 }, {value: "1234\n56789\n00\n"});
 
 testCM("markTextStayGone", function(cm) {
   var m1 = cm.markText(Pos(0, 0), Pos(0, 1));
   cm.replaceRange("hi", Pos(0, 2));
   m1.clear();
   cm.undo();
@@ -486,22 +503,22 @@ testCM("markTextStacked", function(cm) {
 testCM("undoPreservesNewMarks", function(cm) {
   cm.markText(Pos(0, 3), Pos(0, 4));
   cm.markText(Pos(1, 1), Pos(1, 3));
   cm.replaceRange("", Pos(0, 3), Pos(3, 1));
   var mBefore = cm.markText(Pos(0, 0), Pos(0, 1));
   var mAfter = cm.markText(Pos(0, 5), Pos(0, 6));
   var mAround = cm.markText(Pos(0, 2), Pos(0, 4));
   cm.undo();
-  eqPos(mBefore.find().from, Pos(0, 0));
-  eqPos(mBefore.find().to, Pos(0, 1));
-  eqPos(mAfter.find().from, Pos(3, 3));
-  eqPos(mAfter.find().to, Pos(3, 4));
-  eqPos(mAround.find().from, Pos(0, 2));
-  eqPos(mAround.find().to, Pos(3, 2));
+  eqCursorPos(mBefore.find().from, Pos(0, 0));
+  eqCursorPos(mBefore.find().to, Pos(0, 1));
+  eqCursorPos(mAfter.find().from, Pos(3, 3));
+  eqCursorPos(mAfter.find().to, Pos(3, 4));
+  eqCursorPos(mAround.find().from, Pos(0, 2));
+  eqCursorPos(mAround.find().to, Pos(3, 2));
   var found = cm.findMarksAt(Pos(2, 2));
   eq(found.length, 1);
   eq(found[0], mAround);
 }, {value: "aaaa\nbbbb\ncccc\ndddd"});
 
 testCM("markClearBetween", function(cm) {
   cm.setValue("aaa\nbbb\nccc\nddd\n");
   cm.markText(Pos(0, 0), Pos(2));
@@ -542,33 +559,33 @@ testCM("bookmark", function(cm) {
            {a: [1, 4], b: [1, 6], c: "", d: null},
            {a: [1, 5], b: [1, 6], c: "abc", d: [1, 5]},
            {a: [1, 6], b: [1, 8], c: "", d: [1, 5]},
            {a: [1, 4], b: [1, 4], c: "\n\n", d: [3, 1]},
            {bm: [1, 9], a: [1, 1], b: [1, 1], c: "\n", d: [2, 8]}], function(test) {
     cm.setValue("1234567890\n1234567890\n1234567890");
     var b = cm.setBookmark(p(test.bm) || Pos(1, 5));
     cm.replaceRange(test.c, p(test.a), p(test.b));
-    eqPos(b.find(), p(test.d));
+    eqCursorPos(b.find(), p(test.d));
   });
 });
 
 testCM("bookmarkInsertLeft", function(cm) {
   var br = cm.setBookmark(Pos(0, 2), {insertLeft: false});
   var bl = cm.setBookmark(Pos(0, 2), {insertLeft: true});
   cm.setCursor(Pos(0, 2));
   cm.replaceSelection("hi");
-  eqPos(br.find(), Pos(0, 2));
-  eqPos(bl.find(), Pos(0, 4));
+  eqCursorPos(br.find(), Pos(0, 2));
+  eqCursorPos(bl.find(), Pos(0, 4));
   cm.replaceRange("", Pos(0, 4), Pos(0, 5));
   cm.replaceRange("", Pos(0, 2), Pos(0, 4));
   cm.replaceRange("", Pos(0, 1), Pos(0, 2));
   // Verify that deleting next to bookmarks doesn't kill them
-  eqPos(br.find(), Pos(0, 1));
-  eqPos(bl.find(), Pos(0, 1));
+  eqCursorPos(br.find(), Pos(0, 1));
+  eqCursorPos(bl.find(), Pos(0, 1));
 }, {value: "abcdef"});
 
 testCM("bookmarkCursor", function(cm) {
   var pos01 = cm.cursorCoords(Pos(0, 1)), pos11 = cm.cursorCoords(Pos(1, 1)),
       pos20 = cm.cursorCoords(Pos(2, 0)), pos30 = cm.cursorCoords(Pos(3, 0)),
       pos41 = cm.cursorCoords(Pos(4, 1));
   cm.setBookmark(Pos(0, 1), {widget: document.createTextNode("←"), insertLeft: true});
   cm.setBookmark(Pos(2, 0), {widget: document.createTextNode("←"), insertLeft: true});
@@ -645,20 +662,20 @@ testCM("scrollSnap", function(cm) {
   cm.setCursor(Pos(100, 180));
   cm.setCursor(Pos(199, 0));
   info = cm.getScrollInfo();
   is(info.left == 0 && info.top + 2 > info.height - cm.getScrollerElement().clientHeight, "scrolled clean to bottom");
 });
 
 testCM("scrollIntoView", function(cm) {
   if (phantom) return;
-  var outer = cm.getWrapperElement().getBoundingClientRect();
   function test(line, ch, msg) {
     var pos = Pos(line, ch);
     cm.scrollIntoView(pos);
+    var outer = cm.getWrapperElement().getBoundingClientRect();
     var box = cm.charCoords(pos, "window");
     is(box.left >= outer.left, msg + " (left)");
     is(box.right <= outer.right, msg + " (right)");
     is(box.top >= outer.top, msg + " (top)");
     is(box.bottom <= outer.bottom, msg + " (bottom)");
   }
   addDoc(cm, 200, 200);
   test(199, 199, "bottom right");
@@ -784,42 +801,42 @@ function foldLines(cm, start, end, autoC
 }
 
 testCM("collapsedLines", function(cm) {
   addDoc(cm, 4, 10);
   var range = foldLines(cm, 4, 5), cleared = 0;
   CodeMirror.on(range, "clear", function() {cleared++;});
   cm.setCursor(Pos(3, 0));
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(5, 0));
+  eqCharPos(cm.getCursor(), Pos(5, 0));
   cm.replaceRange("abcdefg", Pos(3, 0), Pos(3));
   cm.setCursor(Pos(3, 6));
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(5, 4));
+  eqCharPos(cm.getCursor(), Pos(5, 4));
   cm.replaceRange("ab", Pos(3, 0), Pos(3));
   cm.setCursor(Pos(3, 2));
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(5, 2));
+  eqCharPos(cm.getCursor(), Pos(5, 2));
   cm.operation(function() {range.clear(); range.clear();});
   eq(cleared, 1);
 });
 
 testCM("collapsedRangeCoordsChar", function(cm) {
   var pos_1_3 = cm.charCoords(Pos(1, 3));
   pos_1_3.left += 2; pos_1_3.top += 2;
   var opts = {collapsed: true, inclusiveLeft: true, inclusiveRight: true};
   var m1 = cm.markText(Pos(0, 0), Pos(2, 0), opts);
-  eqPos(cm.coordsChar(pos_1_3), Pos(3, 3));
+  eqCharPos(cm.coordsChar(pos_1_3), Pos(3, 3));
   m1.clear();
   var m1 = cm.markText(Pos(0, 0), Pos(1, 1), {collapsed: true, inclusiveLeft: true});
   var m2 = cm.markText(Pos(1, 1), Pos(2, 0), {collapsed: true, inclusiveRight: true});
-  eqPos(cm.coordsChar(pos_1_3), Pos(3, 3));
+  eqCharPos(cm.coordsChar(pos_1_3), Pos(3, 3));
   m1.clear(); m2.clear();
   var m1 = cm.markText(Pos(0, 0), Pos(1, 6), opts);
-  eqPos(cm.coordsChar(pos_1_3), Pos(3, 3));
+  eqCharPos(cm.coordsChar(pos_1_3), Pos(3, 3));
 }, {value: "123456\nabcdef\nghijkl\nmnopqr\n"});
 
 testCM("collapsedRangeBetweenLinesSelected", function(cm) {
   if (cm.getOption("inputStyle") != "textarea") return;
   var widget = document.createElement("span");
   widget.textContent = "\u2194";
   cm.markText(Pos(0, 3), Pos(1, 0), {replacedWith: widget});
   cm.setSelection(Pos(0, 3), Pos(1, 0));
@@ -847,29 +864,29 @@ testCM("hiddenLinesAutoUnfold", function
   var range = foldLines(cm, 1, 3, true), cleared = 0;
   CodeMirror.on(range, "clear", function() {cleared++;});
   cm.setCursor(Pos(3, 0));
   eq(cleared, 0);
   cm.execCommand("goCharLeft");
   eq(cleared, 1);
   range = foldLines(cm, 1, 3, true);
   CodeMirror.on(range, "clear", function() {cleared++;});
-  eqPos(cm.getCursor(), Pos(3, 0));
+  eqCursorPos(cm.getCursor(), Pos(3, 0));
   cm.setCursor(Pos(0, 3));
   cm.execCommand("goCharRight");
   eq(cleared, 2);
 }, {value: "abc\ndef\nghi\njkl"});
 
 testCM("hiddenLinesSelectAll", function(cm) {  // Issue #484
   addDoc(cm, 4, 20);
   foldLines(cm, 0, 10);
   foldLines(cm, 11, 20);
   CodeMirror.commands.selectAll(cm);
-  eqPos(cm.getCursor(true), Pos(10, 0));
-  eqPos(cm.getCursor(false), Pos(10, 4));
+  eqCursorPos(cm.getCursor(true), Pos(10, 0));
+  eqCursorPos(cm.getCursor(false), Pos(10, 4));
 });
 
 
 testCM("everythingFolded", function(cm) {
   addDoc(cm, 2, 2);
   function enterPress() {
     cm.triggerOnKeyDown({type: "keydown", keyCode: 13, preventDefault: function(){}, stopPropagation: function(){}});
   }
@@ -886,77 +903,77 @@ testCM("everythingFolded", function(cm) 
 testCM("structuredFold", function(cm) {
   if (phantom) return;
   addDoc(cm, 4, 8);
   var range = cm.markText(Pos(1, 2), Pos(6, 2), {
     replacedWith: document.createTextNode("Q")
   });
   cm.setCursor(0, 3);
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(6, 2));
+  eqCharPos(cm.getCursor(), Pos(6, 2));
   CodeMirror.commands.goCharLeft(cm);
-  eqPos(cm.getCursor(), Pos(1, 2));
+  eqCharPos(cm.getCursor(), Pos(1, 2));
   CodeMirror.commands.delCharAfter(cm);
   eq(cm.getValue(), "xxxx\nxxxx\nxxxx");
   addDoc(cm, 4, 8);
   range = cm.markText(Pos(1, 2), Pos(6, 2), {
     replacedWith: document.createTextNode("M"),
     clearOnEnter: true
   });
   var cleared = 0;
   CodeMirror.on(range, "clear", function(){++cleared;});
   cm.setCursor(0, 3);
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(6, 2));
+  eqCharPos(cm.getCursor(), Pos(6, 2));
   CodeMirror.commands.goCharLeft(cm);
-  eqPos(cm.getCursor(), Pos(6, 1));
+  eqCharPos(cm.getCursor(), Pos(6, 1));
   eq(cleared, 1);
   range.clear();
   eq(cleared, 1);
   range = cm.markText(Pos(1, 2), Pos(6, 2), {
     replacedWith: document.createTextNode("Q"),
     clearOnEnter: true
   });
   range.clear();
   cm.setCursor(1, 2);
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(1, 3));
+  eqCharPos(cm.getCursor(), Pos(1, 3));
   range = cm.markText(Pos(2, 0), Pos(4, 4), {
     replacedWith: document.createTextNode("M")
   });
   cm.setCursor(1, 0);
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(2, 0));
+  eqCharPos(cm.getCursor(), Pos(2, 0));
 }, null);
 
 testCM("nestedFold", function(cm) {
   addDoc(cm, 10, 3);
   function fold(ll, cl, lr, cr) {
     return cm.markText(Pos(ll, cl), Pos(lr, cr), {collapsed: true});
   }
   var inner1 = fold(0, 6, 1, 3), inner2 = fold(0, 2, 1, 8), outer = fold(0, 1, 2, 3), inner0 = fold(0, 5, 0, 6);
   cm.setCursor(0, 1);
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(2, 3));
+  eqCursorPos(cm.getCursor(), Pos(2, 3));
   inner0.clear();
   CodeMirror.commands.goCharLeft(cm);
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   outer.clear();
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2, "before"));
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(1, 8));
+  eqCursorPos(cm.getCursor(), Pos(1, 8));
   inner2.clear();
   CodeMirror.commands.goCharLeft(cm);
-  eqPos(cm.getCursor(), Pos(1, 7));
+  eqCursorPos(cm.getCursor(), Pos(1, 7, "after"));
   cm.setCursor(0, 5);
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(0, 6));
+  eqCursorPos(cm.getCursor(), Pos(0, 6, "before"));
   CodeMirror.commands.goCharRight(cm);
-  eqPos(cm.getCursor(), Pos(1, 3));
+  eqCursorPos(cm.getCursor(), Pos(1, 3));
 });
 
 testCM("badNestedFold", function(cm) {
   addDoc(cm, 4, 4);
   cm.markText(Pos(0, 2), Pos(3, 2), {collapsed: true});
   var caught;
   try {cm.markText(Pos(0, 1), Pos(0, 3), {collapsed: true});}
   catch(e) {caught = e;}
@@ -1011,17 +1028,18 @@ testCM("wrappingInlineWidget", function(
   eq(curR.bottom, cur1.bottom);
 }, {value: "1 2 3 xxx 4", lineWrapping: true});
 
 testCM("showEmptyWidgetSpan", function(cm) {
   var marker = cm.markText(Pos(0, 2), Pos(0, 2), {
     clearWhenEmpty: false,
     replacedWith: document.createTextNode("X")
   });
-  eq(cm.display.view[0].text.textContent, "abXc");
+  var text = cm.display.view[0].text;
+  eq(text.textContent || text.innerText, "abXc");
 }, {value: "abc"});
 
 testCM("changedInlineWidget", function(cm) {
   cm.setSize("10em");
   var w = document.createElement("span");
   w.innerHTML = "x";
   var m = cm.markText(Pos(0, 4), Pos(0, 5), {replacedWith: w});
   w.innerHTML = "and now the widget is really really long all of a sudden and a scrollbar is needed";
@@ -1040,23 +1058,23 @@ testCM("changedBookmark", function(cm) {
   var hScroll = byClassName(cm.getWrapperElement(), "CodeMirror-hscrollbar")[0];
   is(hScroll.scrollWidth > hScroll.clientWidth);
 }, {value: "abcdefg"});
 
 testCM("inlineWidget", function(cm) {
   var w = cm.setBookmark(Pos(0, 2), {widget: document.createTextNode("uu")});
   cm.setCursor(0, 2);
   CodeMirror.commands.goLineDown(cm);
-  eqPos(cm.getCursor(), Pos(1, 4));
+  eqCharPos(cm.getCursor(), Pos(1, 4));
   cm.setCursor(0, 2);
   cm.replaceSelection("hi");
-  eqPos(w.find(), Pos(0, 2));
+  eqCharPos(w.find(), Pos(0, 2));
   cm.setCursor(0, 1);
   cm.replaceSelection("ay");
-  eqPos(w.find(), Pos(0, 4));
+  eqCharPos(w.find(), Pos(0, 4));
   eq(cm.getLine(0), "uayuhiuu");
 }, {value: "uuuu\nuuuuuu"});
 
 testCM("wrappingAndResizing", function(cm) {
   cm.setSize(null, "auto");
   cm.setOption("lineWrapping", true);
   var wrap = cm.getWrapperElement(), h0 = wrap.offsetHeight;
   var doc = "xxx xxx xxx xxx xxx";
@@ -1078,39 +1096,96 @@ testCM("wrappingAndResizing", function(c
   // almost-wrapped lines, go over it so that a scrollbar appears.
   cm.setValue(doc + "\n" + doc + "\n");
   cm.getScrollerElement().style.maxHeight = "100px";
   cm.replaceRange("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n!\n", Pos(2, 0));
   forEach([Pos(0, doc.length), Pos(0, doc.length - 1),
            Pos(0, 0), Pos(1, doc.length), Pos(1, doc.length - 1)],
           function(pos) {
     var coords = cm.charCoords(pos);
-    eqPos(pos, cm.coordsChar({left: coords.left + 2, top: coords.top + 5}));
+    eqCharPos(pos, cm.coordsChar({left: coords.left + 2, top: coords.top + 5}));
   });
 }, null, ie_lt8);
 
 testCM("measureEndOfLine", function(cm) {
+  if (phantom) return;
   cm.setSize(null, "auto");
   var inner = byClassName(cm.getWrapperElement(), "CodeMirror-lines")[0].firstChild;
   var lh = inner.offsetHeight;
   for (var step = 10, w = cm.charCoords(Pos(0, 7), "div").right;; w += step) {
     cm.setSize(w);
     if (inner.offsetHeight < 2.5 * lh) {
       if (step == 10) { w -= 10; step = 1; }
       else break;
     }
   }
   cm.setValue(cm.getValue() + "\n\n");
   var endPos = cm.charCoords(Pos(0, 18), "local");
   is(endPos.top > lh * .8, "not at top");
-  is(endPos.left > w - 20, "not at right");
+  is(endPos.left > w - 20, "at right");
   endPos = cm.charCoords(Pos(0, 18));
-  eqPos(cm.coordsChar({left: endPos.left, top: endPos.top + 5}), Pos(0, 18));
+  eqCursorPos(cm.coordsChar({left: endPos.left, top: endPos.top + 5}), Pos(0, 18, "before"));
+
+  var wrapPos = cm.cursorCoords(Pos(0, 9, "before"));
+  is(wrapPos.top < endPos.top, "wrapPos is actually in first line");
+  eqCursorPos(cm.coordsChar({left: wrapPos.left + 10, top: wrapPos.top}), Pos(0, 9, "before"));
 }, {mode: "text/html", value: "<!-- foo barrr -->", lineWrapping: true}, ie_lt8 || opera_lt10);
 
+testCM("measureWrappedEndOfLine", function(cm) {
+  if (phantom) return;
+  cm.setSize(null, "auto");
+  var inner = byClassName(cm.getWrapperElement(), "CodeMirror-lines")[0].firstChild;
+  var lh = inner.offsetHeight;
+  for (var step = 10, w = cm.charCoords(Pos(0, 7), "div").right;; w += step) {
+    cm.setSize(w);
+    if (inner.offsetHeight < 2.5 * lh) {
+      if (step == 10) { w -= 10; step = 1; }
+      else break;
+    }
+  }
+  for (var i = 0; i < 3; ++i) {
+    var endPos = cm.charCoords(Pos(0, 12)); // Next-to-last since last would wrap (#1862)
+    endPos.left += w; // Add width of editor just to be sure that we are behind last character
+    eqCursorPos(cm.coordsChar(endPos), Pos(0, 13, "before"));
+    endPos.left += w * 100;
+    eqCursorPos(cm.coordsChar(endPos), Pos(0, 13, "before"));
+    cm.setValue("0123456789abcابجابجابجابج");
+    if (i == 1) {
+      var node = document.createElement("div");
+      node.innerHTML = "hi"; node.style.height = "30px";
+      cm.addLineWidget(0, node, {above: true});
+    }
+  }
+}, {mode: "text/html", value: "0123456789abcde0123456789", lineWrapping: true}, ie_lt8 || opera_lt10);
+
+testCM("measureWrappedBeginOfLine", function(cm) {
+  if (phantom) return;
+  cm.setSize(null, "auto");
+  var inner = byClassName(cm.getWrapperElement(), "CodeMirror-lines")[0].firstChild;
+  var lh = inner.offsetHeight;
+  for (var step = 10, w = cm.charCoords(Pos(0, 7), "div").right;; w += step) {
+    cm.setSize(w);
+    if (inner.offsetHeight < 2.5 * lh) {
+      if (step == 10) { w -= 10; step = 1; }
+      else break;
+    }
+  }
+  var beginOfSecondLine = Pos(0, 13, "after");
+  for (var i = 0; i < 2; ++i) {
+    var beginPos = cm.charCoords(Pos(0, 0));
+    beginPos.left -= w;
+    eqCursorPos(cm.coordsChar(beginPos), Pos(0, 0, "after"));
+    beginPos = cm.cursorCoords(beginOfSecondLine);
+    beginPos.left = 0;
+    eqCursorPos(cm.coordsChar(beginPos), beginOfSecondLine);
+    cm.setValue("0123456789abcابجابجابجابج");
+    beginOfSecondLine = Pos(0, 25, "before");
+  }
+}, {mode: "text/html", value: "0123456789abcde0123456789", lineWrapping: true});
+
 testCM("scrollVerticallyAndHorizontally", function(cm) {
   if (cm.getOption("inputStyle") != "textarea") return;
   cm.setSize(100, 100);
   addDoc(cm, 40, 40);
   cm.setCursor(39);
   var wrap = cm.getWrapperElement(), bar = byClassName(wrap, "CodeMirror-vscrollbar")[0];
   is(bar.offsetHeight < wrap.offsetHeight, "vertical scrollbar limited by horizontal one");
   var cursorBox = byClassName(wrap, "CodeMirror-cursor")[0].getBoundingClientRect();
@@ -1124,41 +1199,42 @@ testCM("moveVstuck", function(cm) {
   var val = "fooooooooooooooooooooooooo baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaar\n";
   cm.setValue(val);
   for (var w = cm.charCoords(Pos(0, 26), "div").right * 2.8;; w += 5) {
     cm.setSize(w);
     if (lines.offsetHeight <= 3.5 * h0) break;
   }
   cm.setCursor(Pos(0, val.length - 1));
   cm.moveV(-1, "line");
-  eqPos(cm.getCursor(), Pos(0, 26));
+  eqCursorPos(cm.getCursor(), Pos(0, 27, "before"));
+  is(cm.cursorCoords(null, "local").top < h0, "cursor is in first visual line");
 }, {lineWrapping: true}, ie_lt8 || opera_lt10);
 
 testCM("collapseOnMove", function(cm) {
   cm.setSelection(Pos(0, 1), Pos(2, 4));
   cm.execCommand("goLineUp");
   is(!cm.somethingSelected());
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCharPos(cm.getCursor(), Pos(0, 1));
   cm.setSelection(Pos(0, 1), Pos(2, 4));
   cm.execCommand("goPageDown");
   is(!cm.somethingSelected());
-  eqPos(cm.getCursor(), Pos(2, 4));
+  eqCharPos(cm.getCursor(), Pos(2, 4));
   cm.execCommand("goLineUp");
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCharPos(cm.getCursor(), Pos(0, 4));
   cm.setSelection(Pos(0, 1), Pos(2, 4));
   cm.execCommand("goCharLeft");
   is(!cm.somethingSelected());
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCharPos(cm.getCursor(), Pos(0, 1));
 }, {value: "aaaaa\nb\nccccc"});
 
 testCM("clickTab", function(cm) {
   var p0 = cm.charCoords(Pos(0, 0));
-  eqPos(cm.coordsChar({left: p0.left + 5, top: p0.top + 5}), Pos(0, 0));
-  eqPos(cm.coordsChar({left: p0.right - 5, top: p0.top + 5}), Pos(0, 1));
+  eqCharPos(cm.coordsChar({left: p0.left + 5, top: p0.top + 5}), Pos(0, 0));
+  eqCharPos(cm.coordsChar({left: p0.right - 5, top: p0.top + 5}), Pos(0, 1));
 }, {value: "\t\n\n", lineWrapping: true, tabSize: 8});
 
 testCM("verticalScroll", function(cm) {
   cm.setSize(100, 200);
   cm.setValue("foo\nbar\nbaz\n");
   var sc = cm.getScrollerElement(), baseWidth = sc.scrollWidth;
   cm.replaceRange("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah", Pos(0, 0), Pos(0));
   is(sc.scrollWidth > baseWidth, "scrollbar present");
@@ -1200,128 +1276,128 @@ testCM("extraKeys", function(cm) {
   fakeKey(null, 35, {shiftKey: true});
   fakeKey("gtc", 36);
   fakeKey("gtc", 36, {shiftKey: true});
   fakeKey(null, 9);
 }, null, window.opera && mac);
 
 testCM("wordMovementCommands", function(cm) {
   cm.execCommand("goWordLeft");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
   cm.execCommand("goWordRight"); cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(0, 7));
+  eqCursorPos(cm.getCursor(), Pos(0, 7, "before"));
   cm.execCommand("goWordLeft");
-  eqPos(cm.getCursor(), Pos(0, 5));
+  eqCursorPos(cm.getCursor(), Pos(0, 5, "after"));
   cm.execCommand("goWordRight"); cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(0, 12));
+  eqCursorPos(cm.getCursor(), Pos(0, 12, "before"));
   cm.execCommand("goWordLeft");
-  eqPos(cm.getCursor(), Pos(0, 9));
+  eqCursorPos(cm.getCursor(), Pos(0, 9, "after"));
   cm.execCommand("goWordRight"); cm.execCommand("goWordRight"); cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(0, 24));
+  eqCursorPos(cm.getCursor(), Pos(0, 24, "before"));
   cm.execCommand("goWordRight"); cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(1, 9));
+  eqCursorPos(cm.getCursor(), Pos(1, 9, "before"));
   cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(1, 13));
+  eqCursorPos(cm.getCursor(), Pos(1, 13, "before"));
   cm.execCommand("goWordRight"); cm.execCommand("goWordRight");
-  eqPos(cm.getCursor(), Pos(2, 0));
+  eqCharPos(cm.getCursor(), Pos(2, 0));
 }, {value: "this is (the) firstline.\na foo12\u00e9\u00f8\u00d7bar\n"});
 
 testCM("groupMovementCommands", function(cm) {
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCursorPos(cm.getCursor(), Pos(0, 4, "before"));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(0, 7));
+  eqCursorPos(cm.getCursor(), Pos(0, 7, "before"));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(0, 10));
+  eqCursorPos(cm.getCursor(), Pos(0, 10, "before"));
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 7));
+  eqCursorPos(cm.getCursor(), Pos(0, 7, "after"));
   cm.execCommand("goGroupRight"); cm.execCommand("goGroupRight"); cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(0, 15));
+  eqCursorPos(cm.getCursor(), Pos(0, 15, "before"));
   cm.setCursor(Pos(0, 17));
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 16));
+  eqCursorPos(cm.getCursor(), Pos(0, 16, "after"));
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 14));
+  eqCursorPos(cm.getCursor(), Pos(0, 14, "after"));
   cm.execCommand("goGroupRight"); cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(0, 20));
+  eqCursorPos(cm.getCursor(), Pos(0, 20, "before"));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0, "after"));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(1, 2));
+  eqCursorPos(cm.getCursor(), Pos(1, 2, "before"));
   cm.execCommand("goGroupRight");
-  eqPos(cm.getCursor(), Pos(1, 5));
+  eqCursorPos(cm.getCursor(), Pos(1, 5, "before"));
   cm.execCommand("goGroupLeft"); cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0, "after"));
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 20));
+  eqCursorPos(cm.getCursor(), Pos(0, 20, "after"));
   cm.execCommand("goGroupLeft");
-  eqPos(cm.getCursor(), Pos(0, 16));
+  eqCursorPos(cm.getCursor(), Pos(0, 16, "after"));
 }, {value: "booo ba---quux. ffff\n  abc d"});
 
 testCM("groupsAndWhitespace", function(cm) {
   var positions = [Pos(0, 0), Pos(0, 2), Pos(0, 5), Pos(0, 9), Pos(0, 11),
                    Pos(1, 0), Pos(1, 2), Pos(1, 5)];
   for (var i = 1; i < positions.length; i++) {
     cm.execCommand("goGroupRight");
-    eqPos(cm.getCursor(), positions[i]);
+    eqCharPos(cm.getCursor(), positions[i]);
   }
   for (var i = positions.length - 2; i >= 0; i--) {
     cm.execCommand("goGroupLeft");
-    eqPos(cm.getCursor(), i == 2 ? Pos(0, 6) : positions[i]);
+    eqCharPos(cm.getCursor(), i == 2 ? Pos(0, 6, "before") : positions[i]);
   }
 }, {value: "  foo +++  \n  bar"});
 
 testCM("charMovementCommands", function(cm) {
   cm.execCommand("goCharLeft"); cm.execCommand("goColumnLeft");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
   cm.execCommand("goCharRight"); cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2, "before"));
   cm.setCursor(Pos(1, 0));
   cm.execCommand("goColumnLeft");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0));
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(0, 5));
+  eqCursorPos(cm.getCursor(), Pos(0, 5, "before"));
   cm.execCommand("goColumnRight");
-  eqPos(cm.getCursor(), Pos(0, 5));
+  eqCursorPos(cm.getCursor(), Pos(0, 5, "before"));
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0, "after"));
   cm.execCommand("goLineEnd");
-  eqPos(cm.getCursor(), Pos(1, 5));
+  eqCursorPos(cm.getCursor(), Pos(1, 5, "before"));
   cm.execCommand("goLineStartSmart");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCursorPos(cm.getCursor(), Pos(1, 1, "after"));
   cm.execCommand("goLineStartSmart");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0, "after"));
   cm.setCursor(Pos(2, 0));
   cm.execCommand("goCharRight"); cm.execCommand("goColumnRight");
-  eqPos(cm.getCursor(), Pos(2, 0));
+  eqCursorPos(cm.getCursor(), Pos(2, 0));
 }, {value: "line1\n ine2\n"});
 
 testCM("verticalMovementCommands", function(cm) {
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCharPos(cm.getCursor(), Pos(0, 0));
   cm.execCommand("goLineDown");
   if (!phantom) // This fails in PhantomJS, though not in a real Webkit
-    eqPos(cm.getCursor(), Pos(1, 0));
+    eqCharPos(cm.getCursor(), Pos(1, 0));
   cm.setCursor(Pos(1, 12));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(2, 5));
+  eqCharPos(cm.getCursor(), Pos(2, 5));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(3, 0));
+  eqCharPos(cm.getCursor(), Pos(3, 0));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(2, 5));
+  eqCharPos(cm.getCursor(), Pos(2, 5));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(1, 12));
+  eqCharPos(cm.getCursor(), Pos(1, 12));
   cm.execCommand("goPageDown");
-  eqPos(cm.getCursor(), Pos(5, 0));
+  eqCharPos(cm.getCursor(), Pos(5, 0));
   cm.execCommand("goPageDown"); cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(5, 0));
+  eqCharPos(cm.getCursor(), Pos(5, 0));
   cm.execCommand("goPageUp");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCharPos(cm.getCursor(), Pos(0, 0));
 }, {value: "line1\nlong long line2\nline3\n\nline5\n"});
 
 testCM("verticalMovementCommandsWrapping", function(cm) {
   cm.setSize(120);
   cm.setCursor(Pos(0, 5));
   cm.execCommand("goLineDown");
   eq(cm.getCursor().line, 0);
   is(cm.getCursor().ch > 5, "moved beyond wrap");
@@ -1330,64 +1406,94 @@ testCM("verticalMovementCommandsWrapping
     cm.execCommand("goLineDown");
     var cur = cm.getCursor();
     if (cur.line == 1) eq(cur.ch, 5);
     if (cur.line == 2) { eq(cur.ch, 1); break; }
   }
 }, {value: "a very long line that wraps around somehow so that we can test cursor movement\nshortone\nk",
     lineWrapping: true});
 
+testCM("verticalMovementCommandsSingleLine", function(cm) {
+  cm.display.wrapper.style.height = "auto";
+  cm.refresh();
+  cm.execCommand("goLineUp");
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
+  cm.execCommand("goLineDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+  cm.setCursor(Pos(0, 5));
+  cm.execCommand("goLineDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+  cm.execCommand("goLineDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+  cm.execCommand("goLineUp");
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
+  cm.execCommand("goLineUp");
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
+  cm.execCommand("goPageDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+  cm.execCommand("goPageDown"); cm.execCommand("goLineDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+  cm.execCommand("goPageUp");
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
+  cm.setCursor(Pos(0, 5));
+  cm.execCommand("goPageUp");
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
+  cm.setCursor(Pos(0, 5));
+  cm.execCommand("goPageDown");
+  eqCursorPos(cm.getCursor(), Pos(0, 11));
+}, {value: "single line"});
+
+
 testCM("rtlMovement", function(cm) {
   if (cm.getOption("inputStyle") != "textarea") return;
   forEach(["خحج", "خحabcخحج", "abخحخحجcd", "abخde", "abخح2342خ1حج", "خ1ح2خح3حxج",
            "خحcd", "1خحcd", "abcdeح1ج", "خمرحبها مها!", "foobarر", "خ ة ق",
            "<img src=\"/בדיקה3.jpg\">", "يتم السحب في 05 فبراير 2014"], function(line) {
-    var inv = line.charCodeAt(0) > 128;
-    cm.setValue(line + "\n"); cm.execCommand(inv ? "goLineEnd" : "goLineStart");
+    cm.setValue(line + "\n"); cm.execCommand("goLineStart");
     var cursors = byClassName(cm.getWrapperElement(), "CodeMirror-cursors")[0];
     var cursor = cursors.firstChild;
     var prevX = cursor.offsetLeft, prevY = cursor.offsetTop;
     for (var i = 0; i <= line.length; ++i) {
       cm.execCommand("goCharRight");
       cursor = cursors.firstChild;
       if (i == line.length) is(cursor.offsetTop > prevY, "next line");
       else is(cursor.offsetLeft > prevX, "moved right");
       prevX = cursor.offsetLeft; prevY = cursor.offsetTop;
     }
-    cm.setCursor(0, 0); cm.execCommand(inv ? "goLineStart" : "goLineEnd");
+    cm.setCursor(0, 0); cm.execCommand("goLineEnd");
     prevX = cursors.firstChild.offsetLeft;
     for (var i = 0; i < line.length; ++i) {
       cm.execCommand("goCharLeft");
       cursor = cursors.firstChild;
       is(cursor.offsetLeft < prevX, "moved left");
       prevX = cursor.offsetLeft;
     }
   });
 }, null, ie_lt9);
 
 // Verify that updating a line clears its bidi ordering
 testCM("bidiUpdate", function(cm) {
-  cm.setCursor(Pos(0, 2));
+  cm.setCursor(Pos(0, 2, "before"));
   cm.replaceSelection("خحج", "start");
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCursorPos(cm.getCursor(), Pos(0, 6, "before"));
 }, {value: "abcd\n"});
 
 testCM("movebyTextUnit", function(cm) {
   cm.setValue("בְּרֵאשִ\nééé́\n");
-  cm.execCommand("goLineEnd");
+  cm.execCommand("goLineStart");
   for (var i = 0; i < 4; ++i) cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0, "after"));
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(1, 0));
+  eqCursorPos(cm.getCursor(), Pos(1, 0, "after"));
   cm.execCommand("goCharRight");
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(1, 4));
+  eqCursorPos(cm.getCursor(), Pos(1, 4, "before"));
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(1, 7));
+  eqCursorPos(cm.getCursor(), Pos(1, 7, "before"));
 });
 
 testCM("lineChangeEvents", function(cm) {
   addDoc(cm, 3, 5);
   var log = [], want = ["ch 0", "ch 1", "del 2", "ch 0", "ch 0", "del 1", "del 3", "del 4"];
   for (var i = 0; i < 5; ++i) {
     CodeMirror.on(cm.getLineHandle(i), "delete", function(i) {
       return function() {log.push("del " + i);};
@@ -1417,19 +1523,19 @@ testCM("lineWidgets", function(cm) {
   addDoc(cm, 500, 3);
   var last = cm.charCoords(Pos(2, 0));
   var node = document.createElement("div");
   node.innerHTML = "hi";
   var widget = cm.addLineWidget(1, node);
   is(last.top < cm.charCoords(Pos(2, 0)).top, "took up space");
   cm.setCursor(Pos(1, 1));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(2, 1));
+  eqCharPos(cm.getCursor(), Pos(2, 1));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCharPos(cm.getCursor(), Pos(1, 1));
 });
 
 testCM("lineWidgetFocus", function(cm) {
   var place = document.getElementById("testground");
   place.className = "offscreen";
   try {
     addDoc(cm, 500, 10);
     var node = document.createElement("input");
@@ -1543,35 +1649,35 @@ testCM("jumpTheGap", function(cm) {
   var longLine = "abcdef ghiklmnop qrstuvw xyz ";
   longLine += longLine; longLine += longLine; longLine += longLine;
   cm.replaceRange(longLine, Pos(2, 0), Pos(2));
   cm.setSize("200px", null);
   cm.getWrapperElement().style.lineHeight = 2;
   cm.refresh();
   cm.setCursor(Pos(0, 1));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCharPos(cm.getCursor(), Pos(1, 1));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(2, 1));
+  eqCharPos(cm.getCursor(), Pos(2, 1));
   cm.execCommand("goLineDown");
   eq(cm.getCursor().line, 2);
   is(cm.getCursor().ch > 1);
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(2, 1));
+  eqCharPos(cm.getCursor(), Pos(2, 1));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCharPos(cm.getCursor(), Pos(1, 1));
   var node = document.createElement("div");
   node.innerHTML = "hi"; node.style.height = "30px";
   cm.addLineWidget(0, node);
   cm.addLineWidget(1, node.cloneNode(true), {above: true});
   cm.setCursor(Pos(0, 2));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(1, 2));
+  eqCharPos(cm.getCursor(), Pos(1, 2));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCharPos(cm.getCursor(), Pos(0, 2));
 }, {lineWrapping: true, value: "abc\ndef\nghi\njkl\n"});
 
 testCM("addLineClass", function(cm) {
   function cls(line, text, bg, wrap, gutter) {
     var i = cm.lineInfo(line);
     eq(i.textClass, text);
     eq(i.bgClass, bg);
     eq(i.wrapClass, wrap);
@@ -1617,112 +1723,112 @@ testCM("atomicMarker", function(cm) {
   addDoc(cm, 10, 10);
   function atom(ll, cl, lr, cr, li, ri) {
     return cm.markText(Pos(ll, cl), Pos(lr, cr),
                        {atomic: true, inclusiveLeft: li, inclusiveRight: ri});
   }
   var m = atom(0, 1, 0, 5);
   cm.setCursor(Pos(0, 1));
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(0, 5));
+  eqCursorPos(cm.getCursor(), Pos(0, 5));
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   m.clear();
   m = atom(0, 0, 0, 5, true);
-  eqPos(cm.getCursor(), Pos(0, 5), "pushed out");
+  eqCursorPos(cm.getCursor(), Pos(0, 5), "pushed out");
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(0, 5));
+  eqCursorPos(cm.getCursor(), Pos(0, 5));
   m.clear();
   m = atom(8, 4, 9, 10, false, true);
   cm.setCursor(Pos(9, 8));
-  eqPos(cm.getCursor(), Pos(8, 4), "set");
+  eqCursorPos(cm.getCursor(), Pos(8, 4), "set");
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(8, 4), "char right");
+  eqCursorPos(cm.getCursor(), Pos(8, 4), "char right");
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(8, 4), "line down");
+  eqCursorPos(cm.getCursor(), Pos(8, 4), "line down");
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(8, 3));
+  eqCursorPos(cm.getCursor(), Pos(8, 3, "after"));
   m.clear();
   m = atom(1, 1, 3, 8);
   cm.setCursor(Pos(0, 0));
   cm.setCursor(Pos(2, 0));
-  eqPos(cm.getCursor(), Pos(3, 8));
+  eqCursorPos(cm.getCursor(), Pos(3, 8));
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCursorPos(cm.getCursor(), Pos(1, 1));
   cm.execCommand("goCharRight");
-  eqPos(cm.getCursor(), Pos(3, 8));
+  eqCursorPos(cm.getCursor(), Pos(3, 8));
   cm.execCommand("goLineUp");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCursorPos(cm.getCursor(), Pos(1, 1));
   cm.execCommand("goLineDown");
-  eqPos(cm.getCursor(), Pos(3, 8));
+  eqCursorPos(cm.getCursor(), Pos(3, 8));
   cm.execCommand("delCharBefore");
   eq(cm.getValue().length, 80, "del chunk");
   m = atom(3, 0, 5, 5);
   cm.setCursor(Pos(3, 0));
   cm.execCommand("delWordAfter");
   eq(cm.getValue().length, 53, "del chunk");
 });
 
 testCM("selectionBias", function(cm) {
   cm.markText(Pos(0, 1), Pos(0, 3), {atomic: true});
   cm.setCursor(Pos(0, 2));
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   cm.setCursor(Pos(0, 2));
-  eqPos(cm.getCursor(), Pos(0, 3));
+  eqCursorPos(cm.getCursor(), Pos(0, 3));
   cm.setCursor(Pos(0, 2));
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   cm.setCursor(Pos(0, 2), null, {bias: -1});
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   cm.setCursor(Pos(0, 4));
   cm.setCursor(Pos(0, 2), null, {bias: 1});
-  eqPos(cm.getCursor(), Pos(0, 3));
+  eqCursorPos(cm.getCursor(), Pos(0, 3));
 }, {value: "12345"});
 
 testCM("selectionHomeEnd", function(cm) {
   cm.markText(Pos(1, 0), Pos(1, 1), {atomic: true, inclusiveLeft: true});
   cm.markText(Pos(1, 3), Pos(1, 4), {atomic: true, inclusiveRight: true});
   cm.setCursor(Pos(1, 2));
   cm.execCommand("goLineStart");
-  eqPos(cm.getCursor(), Pos(1, 1));
+  eqCursorPos(cm.getCursor(), Pos(1, 1));
   cm.execCommand("goLineEnd");
-  eqPos(cm.getCursor(), Pos(1, 3));
+  eqCursorPos(cm.getCursor(), Pos(1, 3));
 }, {value: "ab\ncdef\ngh"});
 
 testCM("readOnlyMarker", function(cm) {
   function mark(ll, cl, lr, cr, at) {
     return cm.markText(Pos(ll, cl), Pos(lr, cr),
                        {readOnly: true, atomic: at});
   }
   var m = mark(0, 1, 0, 4);
   cm.setCursor(Pos(0, 2));
   cm.replaceSelection("hi", "end");
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2));
   eq(cm.getLine(0), "abcde");
   cm.execCommand("selectAll");
   cm.replaceSelection("oops", "around");
   eq(cm.getValue(), "oopsbcd");
   cm.undo();
-  eqPos(m.find().from, Pos(0, 1));
-  eqPos(m.find().to, Pos(0, 4));
+  eqCursorPos(m.find().from, Pos(0, 1));
+  eqCursorPos(m.find().to, Pos(0, 4));
   m.clear();
   cm.setCursor(Pos(0, 2));
   cm.replaceSelection("hi", "around");
   eq(cm.getLine(0), "abhicde");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCursorPos(cm.getCursor(), Pos(0, 4));
   m = mark(0, 2, 2, 2, true);
   cm.setSelection(Pos(1, 1), Pos(2, 4));
   cm.replaceSelection("t", "end");
-  eqPos(cm.getCursor(), Pos(2, 3));
+  eqCursorPos(cm.getCursor(), Pos(2, 3));
   eq(cm.getLine(2), "klto");
   cm.execCommand("goCharLeft");
   cm.execCommand("goCharLeft");
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2));
   cm.setSelection(Pos(0, 1), Pos(0, 3));
   cm.replaceSelection("xx", "around");
-  eqPos(cm.getCursor(), Pos(0, 3));
+  eqCursorPos(cm.getCursor(), Pos(0, 3));
   eq(cm.getLine(0), "axxhicde");
 }, {value: "abcde\nfghij\nklmno\n"});
 
 testCM("dirtyBit", function(cm) {
   eq(cm.isClean(), true);
   cm.replaceSelection("boo", null, "test");
   eq(cm.isClean(), false);
   cm.undo();
@@ -1756,58 +1862,101 @@ testCM("changeGeneration", function(cm) 
 
 testCM("addKeyMap", function(cm) {
   function sendKey(code) {
     cm.triggerOnKeyDown({type: "keydown", keyCode: code,
                          preventDefault: function(){}, stopPropagation: function(){}});
   }
 
   sendKey(39);
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1, "before"));
   var test = 0;
   var map1 = {Right: function() { ++test; }}, map2 = {Right: function() { test += 10; }}
   cm.addKeyMap(map1);
   sendKey(39);
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1, "before"));
   eq(test, 1);
   cm.addKeyMap(map2, true);
   sendKey(39);
   eq(test, 2);
   cm.removeKeyMap(map1);
   sendKey(39);
   eq(test, 12);
   cm.removeKeyMap(map2);
   sendKey(39);
   eq(test, 12);
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2, "before"));
   cm.addKeyMap({Right: function() { test = 55; }, name: "mymap"});
   sendKey(39);
   eq(test, 55);
   cm.removeKeyMap("mymap");
   sendKey(39);
-  eqPos(cm.getCursor(), Pos(0, 3));
+  eqCursorPos(cm.getCursor(), Pos(0, 3, "before"));
 }, {value: "abc"});
 
+function mouseDown(cm, button, pos, mods) {
+  var coords = cm.charCoords(pos, "window")
+  var event = {type: "mousedown",
+               preventDefault: Math.min,
+               which: button,
+               target: cm.display.lineDiv,
+               clientX: coords.left, clientY: coords.top}
+  if (mods) for (var prop in mods) event[prop] = mods[prop]
+  cm.triggerOnMouseDown(event)
+}
+
+testCM("mouseBinding", function(cm) {
+  var fired = []
+  cm.addKeyMap({
+    "Shift-LeftClick": function(_cm, pos) {
+      eqCharPos(pos, Pos(1, 2))
+      fired.push("a")
+    },
+    "Shift-LeftDoubleClick": function() { fired.push("b") },
+    "Shift-LeftTripleClick": function() { fired.push("c") }
+  })
+
+  function send(button, mods) { mouseDown(cm, button, Pos(1, 2), mods) }
+  send(1, {shiftKey: true})
+  send(1, {shiftKey: true})
+  send(1, {shiftKey: true})
+  send(1, {})
+  send(2, {ctrlKey: true})
+  send(2, {ctrlKey: true})
+  eq(fired.join(" "), "a b c")
+}, {value: "foo\nbar\nbaz"})
+
+testCM("configureMouse", function(cm) {
+  cm.setOption("configureMouse", function() { return {unit: "word"} })
+  mouseDown(cm, 1, Pos(0, 5))
+  eqCharPos(cm.getCursor("from"), Pos(0, 4))
+  eqCharPos(cm.getCursor("to"), Pos(0, 7))
+  cm.setOption("configureMouse", function() { return {extend: true} })
+  mouseDown(cm, 1, Pos(0, 0))
+  eqCharPos(cm.getCursor("from"), Pos(0, 0))
+  eqCharPos(cm.getCursor("to"), Pos(0, 4))
+}, {value: "foo bar baz"})
+
 testCM("findPosH", function(cm) {
-  forEach([{from: Pos(0, 0), to: Pos(0, 1), by: 1},
+  forEach([{from: Pos(0, 0), to: Pos(0, 1, "before"), by: 1},
            {from: Pos(0, 0), to: Pos(0, 0), by: -1, hitSide: true},
-           {from: Pos(0, 0), to: Pos(0, 4), by: 1, unit: "word"},
-           {from: Pos(0, 0), to: Pos(0, 8), by: 2, unit: "word"},
-           {from: Pos(0, 0), to: Pos(2, 0), by: 20, unit: "word", hitSide: true},
-           {from: Pos(0, 7), to: Pos(0, 5), by: -1, unit: "word"},
-           {from: Pos(0, 4), to: Pos(0, 8), by: 1, unit: "word"},
-           {from: Pos(1, 0), to: Pos(1, 18), by: 3, unit: "word"},
-           {from: Pos(1, 22), to: Pos(1, 5), by: -3, unit: "word"},
-           {from: Pos(1, 15), to: Pos(1, 10), by: -5},
-           {from: Pos(1, 15), to: Pos(1, 10), by: -5, unit: "column"},
-           {from: Pos(1, 15), to: Pos(1, 0), by: -50, unit: "column", hitSide: true},
-           {from: Pos(1, 15), to: Pos(1, 24), by: 50, unit: "column", hitSide: true},
-           {from: Pos(1, 15), to: Pos(2, 0), by: 50, hitSide: true}], function(t) {
+           {from: Pos(0, 0), to: Pos(0, 4, "before"), by: 1, unit: "word"},
+           {from: Pos(0, 0), to: Pos(0, 8, "before"), by: 2, unit: "word"},
+           {from: Pos(0, 0), to: Pos(2, 0, "after"), by: 20, unit: "word", hitSide: true},
+           {from: Pos(0, 7), to: Pos(0, 5, "after"), by: -1, unit: "word"},
+           {from: Pos(0, 4), to: Pos(0, 8, "before"), by: 1, unit: "word"},
+           {from: Pos(1, 0), to: Pos(1, 18, "before"), by: 3, unit: "word"},
+           {from: Pos(1, 22), to: Pos(1, 5, "after"), by: -3, unit: "word"},
+           {from: Pos(1, 15), to: Pos(1, 10, "after"), by: -5},
+           {from: Pos(1, 15), to: Pos(1, 10, "after"), by: -5, unit: "column"},
+           {from: Pos(1, 15), to: Pos(1, 0, "after"), by: -50, unit: "column", hitSide: true},
+           {from: Pos(1, 15), to: Pos(1, 24, "before"), by: 50, unit: "column", hitSide: true},
+           {from: Pos(1, 15), to: Pos(2, 0, "after"), by: 50, hitSide: true}], function(t) {
     var r = cm.findPosH(t.from, t.by, t.unit || "char");
-    eqPos(r, t.to);
+    eqCursorPos(r, t.to);
     eq(!!r.hitSide, !!t.hitSide);
   });
 }, {value: "line one\nline two.something.other\n"});
 
 testCM("beforeChange", function(cm) {
   cm.on("beforeChange", function(cm, change) {
     var text = [];
     for (var i = 0; i < change.text.length; ++i)
@@ -1846,20 +1995,20 @@ testCM("beforeSelectionChange", function
   }
   cm.on("beforeSelectionChange", function(cm, obj) {
     obj.update([{anchor: notAtEnd(cm, obj.ranges[0].anchor),
                  head: notAtEnd(cm, obj.ranges[0].head)}]);
   });
 
   addDoc(cm, 10, 10);
   cm.execCommand("goLineEnd");
-  eqPos(cm.getCursor(), Pos(0, 9));
+  eqCursorPos(cm.getCursor(), Pos(0, 9));
   cm.execCommand("selectAll");
-  eqPos(cm.getCursor("start"), Pos(0, 0));
-  eqPos(cm.getCursor("end"), Pos(9, 9));
+  eqCursorPos(cm.getCursor("start"), Pos(0, 0));
+  eqCursorPos(cm.getCursor("end"), Pos(9, 9));
 });
 
 testCM("change_removedText", function(cm) {
   cm.setValue("abc\ndef");
 
   var removedText = [];
   cm.on("change", function(cm, change) {
     removedText.push(change.removed);
@@ -1902,18 +2051,18 @@ testCM("lineStyleFromMode", function(cm)
   eq(bracketElts[0].nodeName, "PRE");
   is(!/brackets.*brackets/.test(bracketElts[0].className));
   var parenElts = byClassName(cm.getWrapperElement(), "parens");
   eq(parenElts.length, 1, "parens count");
   eq(parenElts[0].nodeName, "DIV");
   is(!/parens.*parens/.test(parenElts[0].className));
   eq(parenElts[0].parentElement.nodeName, "DIV");
 
-  eq(byClassName(cm.getWrapperElement(), "bg").length, 1);
-  eq(byClassName(cm.getWrapperElement(), "line").length, 1);
+  is(byClassName(cm.getWrapperElement(), "bg").length > 0);
+  is(byClassName(cm.getWrapperElement(), "line").length > 0);
   var spanElts = byClassName(cm.getWrapperElement(), "cm-span");
   eq(spanElts.length, 2);
   is(/^\s*cm-span\s*$/.test(spanElts[0].className));
 }, {value: "line1: [br] [br]\nline2: (par) (par)\nline3: <tag> <tag>"});
 
 testCM("lineStyleFromBlankLine", function(cm) {
   CodeMirror.defineMode("lineStyleFromBlankLine_mode", function() {
     return {token: function(stream) { stream.skipToEnd(); return "comment"; },
@@ -1954,70 +2103,70 @@ testCM("selectionHistory", function(cm) 
     cm.setExtending(false);
     cm.execCommand("goCharRight");
     cm.execCommand("goCharRight");
   }
   cm.execCommand("undoSelection");
   eq(cm.getSelection(), "c");
   cm.execCommand("undoSelection");
   eq(cm.getSelection(), "");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCursorPos(cm.getCursor(), Pos(0, 4, "before"));
   cm.execCommand("undoSelection");
   eq(cm.getSelection(), "b");
   cm.execCommand("redoSelection");
   eq(cm.getSelection(), "");
-  eqPos(cm.getCursor(), Pos(0, 4));
+  eqCursorPos(cm.getCursor(), Pos(0, 4, "before"));
   cm.execCommand("redoSelection");
   eq(cm.getSelection(), "c");
   cm.execCommand("redoSelection");
   eq(cm.getSelection(), "");
-  eqPos(cm.getCursor(), Pos(0, 6));
+  eqCursorPos(cm.getCursor(), Pos(0, 6, "before"));
 }, {value: "a b c d"});
 
 testCM("selectionChangeReducesRedo", function(cm) {
   cm.replaceSelection("X");
   cm.execCommand("goCharRight");
   cm.undoSelection();
   cm.execCommand("selectAll");
   cm.undoSelection();
   eq(cm.getValue(), "Xabc");
-  eqPos(cm.getCursor(), Pos(0, 1));
+  eqCursorPos(cm.getCursor(), Pos(0, 1));
   cm.undoSelection();
   eq(cm.getValue(), "abc");
 }, {value: "abc"});
 
 testCM("selectionHistoryNonOverlapping", function(cm) {
   cm.setSelection(Pos(0, 0), Pos(0, 1));
   cm.setSelection(Pos(0, 2), Pos(0, 3));
   cm.execCommand("undoSelection");
-  eqPos(cm.getCursor("anchor"), Pos(0, 0));
-  eqPos(cm.getCursor("head"), Pos(0, 1));
+  eqCursorPos(cm.getCursor("anchor"), Pos(0, 0));
+  eqCursorPos(cm.getCursor("head"), Pos(0, 1));
 }, {value: "1234"});
 
 testCM("cursorMotionSplitsHistory", function(cm) {
   cm.replaceSelection("a");
   cm.execCommand("goCharRight");
   cm.replaceSelection("b");
   cm.replaceSelection("c");
   cm.undo();
   eq(cm.getValue(), "a1234");
-  eqPos(cm.getCursor(), Pos(0, 2));
+  eqCursorPos(cm.getCursor(), Pos(0, 2, "before"));
   cm.undo();
   eq(cm.getValue(), "1234");
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
 }, {value: "1234"});
 
 testCM("selChangeInOperationDoesNotSplit", function(cm) {
   for (var i = 0; i < 4; i++) {
     cm.operation(function() {
       cm.replaceSelection("x");
       cm.setCursor(Pos(0, cm.getCursor().ch - 1));
     });
   }
-  eqPos(cm.getCursor(), Pos(0, 0));
+  eqCursorPos(cm.getCursor(), Pos(0, 0));
   eq(cm.getValue(), "xxxxa");
   cm.undo();
   eq(cm.getValue(), "a");
 }, {value: "a"});
 
 testCM("alwaysMergeSelEventWithChangeOrigin", function(cm) {
   cm.replaceSelection("U", null, "foo");
   cm.setSelection(Pos(0, 0), Pos(0, 1), {origin: "foo"});
@@ -2144,8 +2293,203 @@ testCM("lineSeparator", function(cm) {
   eq(cm.getLine(4), "quux");
   eq(cm.getValue(), "foo\rbar\r\rbaz\rquux");
   eq(cm.getValue("\n"), "foo\nbar\n\nbaz\nquux");
   cm.setOption("lineSeparator", null);
   cm.setValue("foo\nbar\r\nbaz\rquux");
   eq(cm.lineCount(), 4);
 }, {value: "foo\nbar\r\nbaz\rquux",
     lineSeparator: "\n"});
+
+var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/
+var getChar = function (noExtending) { var res; do {res = String.fromCharCode(Math.floor(Math.random()*0x8ac)); } while ([0x90].indexOf(res.charCodeAt(0)) != -1 || (noExtending && extendingChars.test(res))); return res }
+var getString = function (n) { var res = getChar(true); while (--n > 0) res += getChar(); return res }
+
+function makeItWrapAfter(cm, pos) {
+  var firstLineTop = cm.cursorCoords(Pos(0, 0)).top;
+  for(var w = 0, posTop; posTop != firstLineTop; ++w) {
+    cm.setSize(w);
+    posTop = cm.charCoords(pos).top;
+  }
+}
+
+function countIf(arr, f) {
+  var result = 0
+  for (var i = 0; i < arr.length; i++) if (f[arr[i]]) result++
+  return result
+}
+
+function testMoveBidi(str) {
+  testCM("move_bidi_" + str, function(cm) {
+    if (cm.getOption("inputStyle") != "textarea" || !cm.getOption("rtlMoveVisually")) return;
+    cm.getScrollerElement().style.fontFamily = "monospace";
+    makeItWrapAfter(cm, Pos(0, 5));
+
+    var steps = str.length - countIf(str.split(""), function(ch) { return extendingChars.test(ch) });
+    var lineBreaks = {}
+    lineBreaks[6 - countIf(str.substr(0, 5).split(""), function(ch) { return extendingChars.test(ch) })] = 'w';
+    if (str.indexOf("\n") != -1) {
+      lineBreaks[steps - 2] = 'n';
+    }
+
+    // Make sure we are at the visual beginning of the first line
+    cm.execCommand("goLineStart");
+
+    var prevCoords = cm.cursorCoords(), coords;
+    for(var i = 0; i < steps; ++i) {
+      cm.execCommand("goCharRight");
+      coords = cm.cursorCoords();
+      if ((i >= 10 && i <= 12) && !lineBreaks[i] && coords.left < prevCoords.left && coords.top > prevCoords.top) {
+        // The first line wraps twice
+        lineBreaks[i] = 'w';
+      }
+      if (!lineBreaks[i]) {
+        is(coords.left > prevCoords.left, "In step " + i + ", cursor didn't move right");
+        eq(coords.top, prevCoords.top, "In step " + i + ", cursor moved out of line");
+      } else {
+        is(coords.left < prevCoords.left, i);
+        is(coords.top > prevCoords.top, i);
+      }
+      prevCoords = coords;
+    }
+
+    cm.execCommand("goCharRight");
+    coords = cm.cursorCoords();
+    eq(coords.left, prevCoords.left, "Moving " + steps + " steps right didn't reach the end");
+    eq(coords.top, prevCoords.top, "Moving " + steps + " steps right didn't reach the end");
+
+    for(i = steps - 1; i >= 0; --i) {
+      cm.execCommand("goCharLeft");
+      coords = cm.cursorCoords();
+      if (!(lineBreaks[i] == 'n' || lineBreaks[i + 1] == 'w')) {
+        is(coords.left < prevCoords.left, "In step " + i + ", cursor didn't move left");
+        eq(coords.top, prevCoords.top, "In step " + i + ", cursor is not at the same line anymore");
+      } else {
+        is(coords.left > prevCoords.left, i);
+        is(coords.top < prevCoords.top, i);
+      }
+      prevCoords = coords;
+    }
+
+    cm.execCommand("goCharLeft");
+    coords = cm.cursorCoords();
+    eq(coords.left, prevCoords.left, "Moving " + steps + " steps left didn't reach the beginning");
+    eq(coords.top, prevCoords.top, "Moving " + steps + " steps left didn't reach the beginning");
+  }, {value: str, lineWrapping: true})
+};
+
+function testMoveEndBidi(str) {
+  testCM("move_end_bidi_" + str, function(cm) {
+    cm.getScrollerElement().style.fontFamily = "monospace";
+    makeItWrapAfter(cm, Pos(0, 5));
+
+    cm.execCommand("goLineStart");
+    var pos = cm.doc.getCursor();
+    cm.execCommand("goCharLeft");
+    eqCursorPos(pos, cm.doc.getCursor());
+
+    cm.execCommand("goLineEnd");
+    pos = cm.doc.getCursor();
+    cm.execCommand("goColumnRight");
+    eqCursorPos(pos, cm.doc.getCursor());
+  }, {value: str, lineWrapping: true})
+};
+
+var bidiTests = [];
+
+// We don't correctly implement L1 UBA
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=1331501
+// and https://bugs.chromium.org/p/chromium/issues/detail?id=673405
+/*
+bidiTests.push("Say ا ب جabj\nS");
+bidiTests.push("Sayyy ا ا ب ج");
+*/
+
+if (!phantom) {
+  bidiTests.push("Όȝǝڪȉۥ״ۺ׆ɀҩۏ\nҳ");
+  bidiTests.push("ŌӰтقȤ؁ƥ؅٣ĎȺ١\nϚ");
+  bidiTests.push("ٻоҤѕѽΩ־؉ïίքdz\nٵ");
+  bidiTests.push("؅؁ĆՕƿɁǞϮؠȩóć\nď");
+  bidiTests.push("RŨďңŪzϢŎƏԖڇڦ\nӈ");
+  bidiTests.push("ό׊۷٢ԜһОצЉيčǟ\nѩ");
+  bidiTests.push("ۑÚҳҕڬġڹհяųKV\nr");
+  bidiTests.push("źڻғúہ4ם1Ƞc1a\nԁ");
+  bidiTests.push("ҒȨҟփƞ٦ԓȦڰғâƥ\nڤ");
+  bidiTests.push("ϖسՉȏŧΔԛdžĎӟیڡ\nέ");
+  bidiTests.push("۹ؼL۵ĺȧКԙػא7״\nم");
+  bidiTests.push("ن (ي)\u2009أقواس"); // thin space to throw off Firefox 51's broken white-space compressing behavior
+}
+
+bidiTests.push("քմѧǮßپüŢҍҞўڳ\nӧ");
+
+//bidiTests.push("Count ١ ٢ ٣ ٤");
+//bidiTests.push("ӣאƦϰ؊ȓېÛوը٬ز\nϪ");
+//bidiTests.push("ҾճٳџIՖӻ٥׭֐؜ڏ\nێ");
+//bidiTests.push("ҬÓФ؜ڂį٦Ͽɓڐͳٵ\nՈ");
+//bidiTests.push("aѴNijȻهˇ҃ڱӧǻֵ\na");
+//bidiTests.push(" a٧ا٢ ب جa\nS");
+
+for (var i = 0; i < bidiTests.length; ++i) {
+  testMoveBidi(bidiTests[i]);
+  testMoveEndBidi(bidiTests[i]);
+}
+
+/*
+for (var i = 0; i < 5; ++i) {
+  testMoveBidi(getString(12) + "\n" + getString(1));
+}
+*/
+
+function testCoordsWrappedBidi(str) {
+  testCM("coords_wrapped_bidi_" + str, function(cm) {
+    cm.getScrollerElement().style.fontFamily = "monospace";
+    makeItWrapAfter(cm, Pos(0, 5));
+
+    // Make sure we are at the visual beginning of the first line
+    var pos = Pos(0, 0), lastPos;
+    cm.doc.setCursor(pos);
+    do {
+      lastPos = pos;
+      cm.execCommand("goCharLeft");
+      pos = cm.doc.getCursor();
+    } while (pos != lastPos)
+
+    var top = cm.charCoords(Pos(0, 0)).top, lastTop;
+    for (var i = 1; i < str.length; ++i) {
+      lastTop = top;
+      top = cm.charCoords(Pos(0, i)).top;
+      is(top >= lastTop);
+    }
+  }, {value: str, lineWrapping: true})
+};
+
+testCoordsWrappedBidi("Count ١ ٢ ٣ ٤");
+/*
+for (var i = 0; i < 5; ++i) {
+  testCoordsWrappedBidi(getString(50));
+}
+*/
+
+testCM("delete_wrapped", function(cm) {
+  makeItWrapAfter(cm, Pos(0, 2));
+  cm.doc.setCursor(Pos(0, 3, "after"));
+  cm.deleteH(-1, "char");
+  eq(cm.getLine(0), "1245");
+}, {value: "12345", lineWrapping: true})
+
+CodeMirror.defineMode("lookahead_mode", function() {
+  // Colors text as atom if the line two lines down has an x in it
+  return {
+    token: function(stream) {
+      stream.skipToEnd()
+      return /x/.test(stream.lookAhead(2)) ? "atom" : null
+    }
+  }
+})
+
+testCM("mode_lookahead", function(cm) {
+  eq(cm.getTokenAt(Pos(0, 1)).type, "atom")
+  eq(cm.getTokenAt(Pos(1, 1)).type, "atom")
+  eq(cm.getTokenAt(Pos(2, 1)).type, null)
+  cm.replaceRange("\n", Pos(2, 0))
+  eq(cm.getTokenAt(Pos(0, 1)).type, null)
+  eq(cm.getTokenAt(Pos(1, 1)).type, "atom")
+}, {value: "foo\na\nx\nx\n", mode: "lookahead_mode"})
--- a/devtools/client/sourceeditor/test/codemirror/vim_test.js
+++ b/devtools/client/sourceeditor/test/codemirror/vim_test.js
@@ -1,8 +1,9 @@
+var Pos = CodeMirror.Pos;
 CodeMirror.Vim.suppressErrorLogging = true;
 
 var code = '' +
 ' wOrd1 (#%\n' +
 ' word3] \n' +
 'aopop pop 0 1 2 3 4\n' +
 ' (a) [b] {c} \n' +
 'int getchar(void) {\n' +
@@ -34,73 +35,73 @@ var endOfDocument = makeCursor(lines.len
     lines[lines.length - 1].length);
 var wordLine = lines[0];
 var bigWordLine = lines[1];
 var charLine = lines[2];
 var bracesLine = lines[3];
 var seekBraceLine = lines[4];
 
 var word1 = {
-  start: { line: wordLine.line, ch: 1 },
-  end: { line: wordLine.line, ch: 5 }
+  start: new Pos(wordLine.line, 1),
+  end: new Pos(wordLine.line, 5)
 };
 var word2 = {
-  start: { line: wordLine.line, ch: word1.end.ch + 2 },
-  end: { line: wordLine.line, ch: word1.end.ch + 4 }
+  start: new Pos(wordLine.line, word1.end.ch + 2),
+  end: new Pos(wordLine.line, word1.end.ch + 4)
 };
 var word3 = {
-  start: { line: bigWordLine.line, ch: 1 },
-  end: { line: bigWordLine.line, ch: 5 }
+  start: new Pos(bigWordLine.line, 1),
+  end: new Pos(bigWordLine.line, 5)
 };
 var bigWord1 = word1;
 var bigWord2 = word2;
 var bigWord3 = {
-  start: { line: bigWordLine.line, ch: 1 },
-  end: { line: bigWordLine.line, ch: 7 }
+  start: new Pos(bigWordLine.line, 1),
+  end: new Pos(bigWordLine.line, 7)
 };
 var bigWord4 = {
-  start: { line: bigWordLine.line, ch: bigWord1.end.ch + 3 },
-  end: { line: bigWordLine.line, ch: bigWord1.end.ch + 7 }
+  start: new Pos(bigWordLine.line, bigWord1.end.ch + 3),
+  end: new Pos(bigWordLine.line, bigWord1.end.ch + 7)
 };
 
-var oChars = [ { line: charLine.line, ch: 1 },
-    { line: charLine.line, ch: 3 },
-    { line: charLine.line, ch: 7 } ];
-var pChars = [ { line: charLine.line, ch: 2 },
-    { line: charLine.line, ch: 4 },
-    { line: charLine.line, ch: 6 },
-    { line: charLine.line, ch: 8 } ];
-var numChars = [ { line: charLine.line, ch: 10 },
-    { line: charLine.line, ch: 12 },
-    { line: charLine.line, ch: 14 },
-    { line: charLine.line, ch: 16 },
-    { line: charLine.line, ch: 18 }];
+var oChars = [ new Pos(charLine.line, 1),
+    new Pos(charLine.line, 3),
+    new Pos(charLine.line, 7) ];
+var pChars = [ new Pos(charLine.line, 2),
+    new Pos(charLine.line, 4),
+    new Pos(charLine.line, 6),
+    new Pos(charLine.line, 8) ];
+var numChars = [ new Pos(charLine.line, 10),
+    new Pos(charLine.line, 12),
+    new Pos(charLine.line, 14),
+    new Pos(charLine.line, 16),
+    new Pos(charLine.line, 18)];
 var parens1 = {
-  start: { line: bracesLine.line, ch: 1 },
-  end: { line: bracesLine.line, ch: 3 }
+  start: new Pos(bracesLine.line, 1),
+  end: new Pos(bracesLine.line, 3)
 };
 var squares1 = {
-  start: { line: bracesLine.line, ch: 5 },
-  end: { line: bracesLine.line, ch: 7 }
+  start: new Pos(bracesLine.line, 5),
+  end: new Pos(bracesLine.line, 7)
 };
 var curlys1 = {
-  start: { line: bracesLine.line, ch: 9 },
-  end: { line: bracesLine.line, ch: 11 }
+  start: new Pos(bracesLine.line, 9),
+  end: new Pos(bracesLine.line, 11)
 };
 var seekOutside = {
-  start: { line: seekBraceLine.line, ch: 1 },
-  end: { line: seekBraceLine.line, ch: 16 }
+  start: new Pos(seekBraceLine.line, 1),
+  end: new Pos(seekBraceLine.line, 16)
 };
 var seekInside = {
-  start: { line: seekBraceLine.line, ch: 14 },
-  end: { line: seekBraceLine.line, ch: 11 }
+  start: new Pos(seekBraceLine.line, 14),
+  end: new Pos(seekBraceLine.line, 11)
 };
 
 function copyCursor(cur) {
-  return { ch: cur.ch, line: cur.line };
+  return new Pos(cur.line, cur.ch);
 }
 
 function forEach(arr, func) {
   for (var i = 0; i < arr.length; i++) {
     func(arr[i], i, arr);
   }
 }
 
@@ -122,17 +123,20 @@ function testVim(name, run, opts, expect
     var vim = CodeMirror.Vim.maybeInitVimState_(cm);
 
     function doKeysFn(cm) {
       return function(args) {
         if (args instanceof Array) {
           arguments = args;
         }
         for (var i = 0; i < arguments.length; i++) {
-          CodeMirror.Vim.handleKey(cm, arguments[i]);
+          var result = CodeMirror.Vim.handleKey(cm, arguments[i]);
+          if (!result && cm.state.vim.insertMode) {
+            cm.replaceSelections(fillArray(arguments[i], cm.listSelections().length));
+          }
         }
       }
     }
     function doInsertModeKeysFn(cm) {
       return function(args) {
         if (args instanceof Array) { arguments = args; }
         function executeHandler(handler) {
           if (typeof handler == 'string') {
@@ -140,21 +144,21 @@ function testVim(name, run, opts, expect
           } else {
             handler(cm);
           }
           return true;
         }
         for (var i = 0; i < arguments.length; i++) {
           var key = arguments[i];
           // Find key in keymap and handle.
-          var handled = CodeMirror.lookupKey(key, 'vim-insert', executeHandler);
+          var handled = CodeMirror.lookupKey(key, cm.getOption('keyMap'), executeHandler, cm);
           // Record for insert mode.
           if (handled == "handled" && cm.state.vim.insertMode && arguments[i] != 'Esc') {
             var lastChange = CodeMirror.Vim.getVimGlobalState_().macroModeState.lastInsertModeChanges;
-            if (lastChange) {
+            if (lastChange && (key.indexOf('Delete') != -1 || key.indexOf('Backspace') != -1)) {
               lastChange.changes.push(new CodeMirror.Vim.InsertModeKey(key));
             }
           }
         }
       }
     }
     function doExFn(cm) {
       return function(command) {
@@ -165,17 +169,17 @@ function testVim(name, run, opts, expect
     function assertCursorAtFn(cm) {
       return function(line, ch) {
         var pos;
         if (ch == null && typeof line.line == 'number') {
           pos = line;
         } else {
           pos = makeCursor(line, ch);
         }
-        eqPos(pos, cm.getCursor());
+        eqCursorPos(cm.getCursor(), pos);
       }
     }
     function fakeOpenDialog(result) {
       return function(text, callback) {
         return callback(result);
       }
     }
     function fakeOpenNotification(matcher) {
@@ -284,30 +288,30 @@ testJumplist('jumplist_skip_deleted_mark
  * @param name Name of the test
  * @param keys An array of keys or a string with a single key to simulate.
  * @param endPos The expected end position of the cursor.
  * @param startPos The position the cursor should start at, defaults to 0, 0.
  */
 function testMotion(name, keys, endPos, startPos) {
   testVim(name, function(cm, vim, helpers) {
     if (!startPos) {
-      startPos = { line: 0, ch: 0 };
+      startPos = new Pos(0, 0);
     }
     cm.setCursor(startPos);
     helpers.doKeys(keys);
     helpers.assertCursorAt(endPos);
   });
 };
 
 function makeCursor(line, ch) {
-  return { line: line, ch: ch };
+  return new Pos(line, ch);
 };
 
 function offsetCursor(cur, offsetLine, offsetCh) {
-  return { line: cur.line + offsetLine, ch: cur.ch + offsetCh };
+  return new Pos(cur.line + offsetLine, cur.ch + offsetCh);
 };
 
 // Motion tests
 testMotion('|', '|', makeCursor(0, 0), makeCursor(0,4));
 testMotion('|_repeat', ['3', '|'], makeCursor(0, 2), makeCursor(0,4));
 testMotion('h', 'h', makeCursor(0, 0), word1.start);
 testMotion('h_repeat', ['3', 'h'], offsetCursor(word1.end, 0, -3), word1.end);
 testMotion('l', 'l', makeCursor(0, 1));
@@ -400,30 +404,30 @@ testVim('%_skip_comment', function(cm, v
 }, {value:'(/*)*/)'});
 // Make sure that moving down after going to the end of a line always leaves you
 // at the end of a line, but preserves the offset in other cases
 testVim('Changing lines after Eol operation', function(cm, vim, helpers) {
   cm.setCursor(0,0);
   helpers.doKeys(['$']);
   helpers.doKeys(['j']);
   // After moving to Eol and then down, we should be at Eol of line 2
-  helpers.assertCursorAt({ line: 1, ch: lines[1].length - 1 });
+  helpers.assertCursorAt(new Pos(1, lines[1].length - 1));
   helpers.doKeys(['j']);
   // After moving down, we should be at Eol of line 3
-  helpers.assertCursorAt({ line: 2, ch: lines[2].length - 1 });
+  helpers.assertCursorAt(new Pos(2, lines[2].length - 1));
   helpers.doKeys(['h']);
   helpers.doKeys(['j']);
   // After moving back one space and then down, since line 4 is shorter than line 2, we should
   // be at Eol of line 2 - 1
-  helpers.assertCursorAt({ line: 3, ch: lines[3].length - 1 });
+  helpers.assertCursorAt(new Pos(3, lines[3].length - 1));
   helpers.doKeys(['j']);
   helpers.doKeys(['j']);
   // After moving down again, since line 3 has enough characters, we should be back to the
   // same place we were at on line 1
-  helpers.assertCursorAt({ line: 5, ch: lines[2].length - 2 });
+  helpers.assertCursorAt(new Pos(5, lines[2].length - 2));
 });
 //making sure gj and gk recover from clipping
 testVim('gj_gk_clipping', function(cm,vim,helpers){
   cm.setCursor(0, 1);
   helpers.doKeys('g','j','g','j');
   helpers.assertCursorAt(2, 1);
   helpers.doKeys('g','k','g','k');
   helpers.assertCursorAt(0, 1);
@@ -462,17 +466,17 @@ testVim('gj_gk', function(cm, vim, helpe
   cm.setCursor(0, 4);
   helpers.doKeys('g', 'j');
   helpers.doKeys('10', 'g', 'k');
   helpers.assertCursorAt(0, 4);
 
   // Test moving down preserves column position.
   helpers.doKeys('g', 'j');
   var pos1 = cm.getCursor();
-  var expectedPos2 = { line: 0, ch: (pos1.ch - 4) * 2 + 4};
+  var expectedPos2 = new Pos(0, (pos1.ch - 4) * 2 + 4);
   helpers.doKeys('g', 'j');
   helpers.assertCursorAt(expectedPos2);
 
   // Move to the last character
   cm.setCursor(0, 0);
   // Move left to reset HSPos
   helpers.doKeys('h');
   // Test bottom of document edge case.
@@ -522,57 +526,57 @@ testVim('paragraph_motions', function(cm
 
   cm.setCursor(6, 0);
   helpers.doKeys('}');
   helpers.assertCursorAt(7, 0);
 
   // ip inside empty space
   cm.setCursor(10, 0);
   helpers.doKeys('v', 'i', 'p');
-  eqPos(Pos(7, 0), cm.getCursor('anchor'));
-  eqPos(Pos(12, 0), cm.getCursor('head'));
+  eqCursorPos(Pos(7, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(12, 0), cm.getCursor('head'));
   helpers.doKeys('i', 'p');
-  eqPos(Pos(7, 0), cm.getCursor('anchor'));
-  eqPos(Pos(13, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(7, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(13, 1), cm.getCursor('head'));
   helpers.doKeys('2', 'i', 'p');
-  eqPos(Pos(7, 0), cm.getCursor('anchor'));
-  eqPos(Pos(16, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(7, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(16, 1), cm.getCursor('head'));
 
   // should switch to visualLine mode
   cm.setCursor(14, 0);
   helpers.doKeys('<Esc>', 'v', 'i', 'p');
   helpers.assertCursorAt(14, 0);
 
   cm.setCursor(14, 0);
   helpers.doKeys('<Esc>', 'V', 'i', 'p');
-  eqPos(Pos(16, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(16, 1), cm.getCursor('head'));
 
   // ap inside empty space
   cm.setCursor(10, 0);
   helpers.doKeys('<Esc>', 'v', 'a', 'p');
-  eqPos(Pos(7, 0), cm.getCursor('anchor'));
-  eqPos(Pos(13, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(7, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(13, 1), cm.getCursor('head'));
   helpers.doKeys('a', 'p');
-  eqPos(Pos(7, 0), cm.getCursor('anchor'));
-  eqPos(Pos(16, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(7, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(16, 1), cm.getCursor('head'));
 
   cm.setCursor(13, 0);
   helpers.doKeys('v', 'a', 'p');
-  eqPos(Pos(13, 0), cm.getCursor('anchor'));
-  eqPos(Pos(14, 0), cm.getCursor('head'));
+  eqCursorPos(Pos(13, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(14, 0), cm.getCursor('head'));
 
   cm.setCursor(16, 0);
   helpers.doKeys('v', 'a', 'p');
-  eqPos(Pos(14, 0), cm.getCursor('anchor'));
-  eqPos(Pos(16, 1), cm.getCursor('head'));
+  eqCursorPos(Pos(14, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(16, 1), cm.getCursor('head'));
 
   cm.setCursor(0, 0);
   helpers.doKeys('v', 'a', 'p');
-  eqPos(Pos(0, 0), cm.getCursor('anchor'));
-  eqPos(Pos(4, 0), cm.getCursor('head'));
+  eqCursorPos(Pos(0, 0), cm.getCursor('anchor'));
+  eqCursorPos(Pos(4, 0), cm.getCursor('head'));
 
   cm.setCursor(0, 0);
   helpers.doKeys('d', 'i', 'p');
   var register = helpers.getRegisterController().getRegister();
   eq('a\na\n', register.toString());
   is(register.linewise);
   helpers.doKeys('3', 'j', 'p');
   helpers.doKeys('y', 'i', 'p');
@@ -584,17 +588,17 @@ testVim('paragraph_motions', function(cm
 testVim('dl', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 0);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'l');
   eq('word1 ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq(' ', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1 ' });
 testVim('dl_eol', function(cm, vim, helpers) {
   cm.setCursor(0, 6);
   helpers.doKeys('d', 'l');
   eq(' word1', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq(' ', register.toString());
   is(!register.linewise);
@@ -603,27 +607,27 @@ testVim('dl_eol', function(cm, vim, help
 testVim('dl_repeat', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 0);
   cm.setCursor(curStart);
   helpers.doKeys('2', 'd', 'l');
   eq('ord1 ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq(' w', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1 ' });
 testVim('dh', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'h');
   eq(' wrd1 ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('o', register.toString());
   is(!register.linewise);
-  eqPos(offsetCursor(curStart, 0 , -1), cm.getCursor());
+  eqCursorPos(offsetCursor(curStart, 0 , -1), cm.getCursor());
 }, { value: ' word1 ' });
 testVim('dj', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'j');
   eq(' word3', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq(' word1\nword2\n', register.toString());
@@ -663,27 +667,27 @@ testVim('dk_start_of_document', function
 testVim('dw_space', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 0);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'w');
   eq('word1 ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq(' ', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1 ' });
 testVim('dw_word', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 1);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'w');
   eq(' word2', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('word1 ', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1 word2' });
 testVim('dw_unicode_word', function(cm, vim, helpers) {
   helpers.doKeys('d', 'w');
   eq(cm.getValue().length, 10);
   helpers.doKeys('d', 'w');
   eq(cm.getValue().length, 6);
   helpers.doKeys('d', 'w');
   eq(cm.getValue().length, 5);
@@ -843,68 +847,68 @@ testVim('d_inclusive', function(cm, vim,
   // deleted too.
   var curStart = makeCursor(0, 1);
   cm.setCursor(curStart);
   helpers.doKeys('d', 'e');
   eq('  ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('word1', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1 ' });
 testVim('d_reverse', function(cm, vim, helpers) {
   // Test that deleting in reverse works.
   cm.setCursor(1, 0);
   helpers.doKeys('d', 'b');
   eq(' word2 ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('word1\n', register.toString());
   is(!register.linewise);
   helpers.assertCursorAt(0, 1);
 }, { value: ' word1\nword2 ' });
 testVim('dd', function(cm, vim, helpers) {
   cm.setCursor(0, 3);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 1, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(1, 0));
   var expectedLineCount = cm.lineCount() - 1;
   helpers.doKeys('d', 'd');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
   helpers.assertCursorAt(0, lines[1].textStart);
 });
 testVim('dd_prefix_repeat', function(cm, vim, helpers) {
   cm.setCursor(0, 3);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 2, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(2, 0));
   var expectedLineCount = cm.lineCount() - 2;
   helpers.doKeys('2', 'd', 'd');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
   helpers.assertCursorAt(0, lines[2].textStart);
 });
 testVim('dd_motion_repeat', function(cm, vim, helpers) {
   cm.setCursor(0, 3);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 2, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(2, 0));
   var expectedLineCount = cm.lineCount() - 2;
   helpers.doKeys('d', '2', 'd');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
   helpers.assertCursorAt(0, lines[2].textStart);
 });
 testVim('dd_multiply_repeat', function(cm, vim, helpers) {
   cm.setCursor(0, 3);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 6, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(6, 0));
   var expectedLineCount = cm.lineCount() - 6;
   helpers.doKeys('2', 'd', '3', 'd');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
   helpers.assertCursorAt(0, lines[6].textStart);
 });
@@ -931,31 +935,35 @@ testVim('yw_repeat', function(cm, vim, h
   // that repeat works properly.
   var curStart = makeCursor(0, 1);
   cm.setCursor(curStart);
   helpers.doKeys('y', '2', 'w');
   eq(' word1\nword2', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('word1\nword2', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1\nword2' });
 testVim('yy_multiply_repeat', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 6, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(6, 0));
   var expectedLineCount = cm.lineCount();
   helpers.doKeys('2', 'y', '3', 'y');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 });
+testVim('2dd_blank_P', function(cm, vim, helpers) {
+  helpers.doKeys('2', 'd', 'd', 'P');
+  eq('\na\n\n', cm.getValue());
+}, { value: '\na\n\n' });
 // Change commands behave like d commands except that it also enters insert
 // mode. In addition, when the change is linewise, an additional newline is
 // inserted so that insert mode starts on that line.
 testVim('cw', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('c', '2', 'w');
   eq(' word3', cm.getValue());
   helpers.assertCursorAt(0, 0);
@@ -965,23 +973,23 @@ testVim('cw_repeat', function(cm, vim, h
   // that repeat works properly.
   var curStart = makeCursor(0, 1);
   cm.setCursor(curStart);
   helpers.doKeys('c', '2', 'w');
   eq(' ', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('word1\nword2', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
   eq('vim-insert', cm.getOption('keyMap'));
 }, { value: ' word1\nword2' });
 testVim('cc_multiply_repeat', function(cm, vim, helpers) {
   cm.setCursor(0, 3);
-  var expectedBuffer = cm.getRange({ line: 0, ch: 0 },
-    { line: 6, ch: 0 });
+  var expectedBuffer = cm.getRange(new Pos(0, 0),
+    new Pos(6, 0));
   var expectedLineCount = cm.lineCount() - 5;
   helpers.doKeys('2', 'c', '3', 'c');
   eq(expectedLineCount, cm.lineCount());
   var register = helpers.getRegisterController().getRegister();
   eq(expectedBuffer, register.toString());
   is(register.linewise);
   eq('vim-insert', cm.getOption('keyMap'));
 });
@@ -1065,51 +1073,51 @@ testVim('g~w_repeat', function(cm, vim, 
   // that repeat works properly.
   var curStart = makeCursor(0, 1);
   cm.setCursor(curStart);
   helpers.doKeys('g', '~', '2', 'w');
   eq(' WORD1\nWORD2', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1\nword2' });
 testVim('g~g~', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
   var expectedLineCount = cm.lineCount();
   var expectedValue = cm.getValue().toUpperCase();
   helpers.doKeys('2', 'g', '~', '3', 'g', '~');
   eq(expectedValue, cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
 }, { value: ' word1\nword2\nword3\nword4\nword5\nword6' });
 testVim('gu_and_gU', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 7);
   var value = cm.getValue();
   cm.setCursor(curStart);
   helpers.doKeys('2', 'g', 'U', 'w');
   eq(cm.getValue(), 'wa wb xX WC wd');
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
   helpers.doKeys('2', 'g', 'u', 'w');
   eq(cm.getValue(), value);
 
   helpers.doKeys('2', 'g', 'U', 'B');
   eq(cm.getValue(), 'wa WB Xx wc wd');
-  eqPos(makeCursor(0, 3), cm.getCursor());
+  eqCursorPos(makeCursor(0, 3), cm.getCursor());
 
   cm.setCursor(makeCursor(0, 4));
   helpers.doKeys('g', 'u', 'i', 'w');
   eq(cm.getValue(), 'wa wb Xx wc wd');
-  eqPos(makeCursor(0, 3), cm.getCursor());
+  eqCursorPos(makeCursor(0, 3), cm.getCursor());
 
   // TODO: support gUgU guu
-  // eqPos(makeCursor(0, 0), cm.getCursor());
+  // eqCursorPos(makeCursor(0, 0), cm.getCursor());
 
   var register = helpers.getRegisterController().getRegister();
   eq('', register.toString());
   is(!register.linewise);
 }, { value: 'wa wb xx wc wd' });
 testVim('visual_block_~', function(cm, vim, helpers) {
   cm.setCursor(1, 1);
   helpers.doKeys('<C-v>', 'l', 'l', 'j', '~');
@@ -1252,17 +1260,17 @@ testEdit('dab_on_(_should_delete_around_
 testEdit('daB_on_{_should_delete_around_{}block', 'o{ in{abc} }', /{a/, 'daB', 'o{ in }');
 testEdit('diB_on_{_should_delete_inner_{}block', 'o{ in{abc} }', /{a/, 'diB', 'o{ in{} }');
 
 testEdit('da{_on_{_should_delete_inner_block', 'o{ in{abc} }', /{a/, 'da{', 'o{ in }');
 testEdit('di[_on_(_should_not_delete', 'foo (bAr) baz', /\(/, 'di[', 'foo (bAr) baz');
 testEdit('di[_on_)_should_not_delete', 'foo (bAr) baz', /\)/, 'di[', 'foo (bAr) baz');
 testEdit('da[_on_(_should_not_delete', 'foo (bAr) baz', /\(/, 'da[', 'foo (bAr) baz');
 testEdit('da[_on_)_should_not_delete', 'foo (bAr) baz', /\)/, 'da[', 'foo (bAr) baz');
-testMotion('di(_outside_should_stay', ['d', 'i', '('], { line: 0, ch: 0}, { line: 0, ch: 0});
+testMotion('di(_outside_should_stay', ['d', 'i', '('], new Pos(0, 0), new Pos(0, 0));
 
 //  Open and close on different lines, equally indented
 testEdit('di{_middle_spc', 'a{\n\tbar\n}b', /r/, 'di{', 'a{}b');
 testEdit('di}_middle_spc', 'a{\n\tbar\n}b', /r/, 'di}', 'a{}b');
 testEdit('da{_middle_spc', 'a{\n\tbar\n}b', /r/, 'da{', 'ab');
 testEdit('da}_middle_spc', 'a{\n\tbar\n}b', /r/, 'da}', 'ab');
 testEdit('daB_middle_spc', 'a{\n\tbar\n}b', /r/, 'daB', 'ab');
 
@@ -1324,27 +1332,27 @@ testVim('D', function(cm, vim, helpers) 
 testVim('C', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
   helpers.doKeys('C');
   eq(' wo\nword2\n word3', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
   eq('rd1', register.toString());
   is(!register.linewise);
-  eqPos(curStart, cm.getCursor());
+  eqCursorPos(curStart, cm.getCursor());
   eq('vim-insert', cm.getOption('keyMap'));
 }, { value: ' word1\nword2\n word3' });
 testVim('Y', function(cm, vim, helpers) {
   var curStart = makeCursor(0, 3);
   cm.setCursor(curStart);
   helpers.doKeys('Y');
   eq(' word1\nword2\n word3', cm.getValue());
   var register = helpers.getRegisterController().getRegister();
-  eq('rd1', register.toString());
-  is(!register.linewise);
+  eq(' word1\n', register.toString());
+  is(register.linewise);
   helpers.assertCursorAt(0, 3);
 }, { value: ' word1\nword2\n word3' });
 testVim('~', function(cm, vim, helpers) {
   helpers.doKeys('3', '~');
   eq('ABCdefg', cm.getValue());
   helpers.assertCursorAt(0, 3);
 }, { value: 'abcdefg' });
 
@@ -1414,16 +1422,42 @@ testVim('i_repeat_delete', function(cm, 
   cm.setCursor(0, 4);
   helpers.doKeys('2', 'i');
   cm.replaceRange('z', cm.getCursor());
   helpers.doInsertModeKeys('Backspace', 'Backspace');
   helpers.doKeys('<Esc>');
   eq('abe', cm.getValue());
   helpers.assertCursorAt(0, 1);
 }, { value: 'abcde' });
+testVim('insert', function(cm, vim, helpers) {
+  helpers.doKeys('i');
+  eq('vim-insert', cm.getOption('keyMap'));
+  eq(false, cm.state.overwrite);
+  helpers.doKeys('<Ins>');
+  eq('vim-replace', cm.getOption('keyMap'));
+  eq(true, cm.state.overwrite);
+  helpers.doKeys('<Ins>');
+  eq('vim-insert', cm.getOption('keyMap'));
+  eq(false, cm.state.overwrite);
+});
+testVim('i_backspace', function(cm, vim, helpers) {
+  cm.setCursor(0, 10);
+  helpers.doKeys('i');
+  helpers.doInsertModeKeys('Backspace');
+  helpers.assertCursorAt(0, 9);
+  eq('012345678', cm.getValue());
+}, { value: '0123456789'});
+testVim('i_overwrite_backspace', function(cm, vim, helpers) {
+  cm.setCursor(0, 10);
+  helpers.doKeys('i');
+  helpers.doKeys('<Ins>');
+  helpers.doInsertModeKeys('Backspace');
+  helpers.assertCursorAt(Pos(0, 9, "after"));
+  eq('0123456789', cm.getValue());
+}, { value: '0123456789'});
 testVim('A', function(cm, vim, helpers) {
   helpers.doKeys('A');
   helpers.assertCursorAt(0, lines[0].length);
   eq('vim-insert', cm.getOption('keyMap'));
 });
 testVim('A_visual_block', function(cm, vim, helpers) {
   cm.setCursor(0, 1);
   helpers.doKeys('<C-v>', '2', 'j', 'l', 'l', 'A');
@@ -1572,16 +1606,23 @@ testVim('P_line', function(cm, vim, help
 testVim('r', function(cm, vim, helpers) {
   cm.setCursor(0, 1);
   helpers.doKeys('3', 'r', 'u');
   eq('wuuuet\nanother', cm.getValue(),'3r failed');
   helpers.assertCursorAt(0, 3);
   cm.setCursor(0, 4);
   helpers.doKeys('v', 'j', 'h', 'r', '<Space>');
   eq('wuuu  \n    her', cm.getValue(),'Replacing selection by space-characters failed');
+  cm.setValue("ox");
+  helpers.doKeys('r', '<C-c>');
+  eq('ox', cm.getValue());
+  helpers.doKeys('r', '<Del>');
+  eq('ox', cm.getValue());
+  helpers.doKeys('r', '<CR>');
+  eq('\nx', cm.getValue());
 }, { value: 'wordet\nanother' });
 testVim('r_visual_block', function(cm, vim, helpers) {
   cm.setCursor(2, 3);
   helpers.doKeys('<C-v>', 'k', 'k', 'h', 'h', 'r', 'l');
   eq('1lll\n5lll\nalllefg', cm.getValue());
   helpers.doKeys('<C-v>', 'l', 'j', 'r', '<Space>');
   eq('1  l\n5  l\nalllefg', cm.getValue());
   cm.setCursor(2, 0);
@@ -1605,16 +1646,27 @@ testVim('mark', function(cm, vim, helper
   helpers.doKeys('`', 't');
   helpers.assertCursorAt(2, 2);
   cm.setCursor(2, 0);
   cm.replaceRange('   h', cm.getCursor());
   cm.setCursor(0, 0);
   helpers.doKeys('\'', 't');
   helpers.assertCursorAt(2, 3);
 });
+testVim('mark\'', function(cm, vim, helpers) {
+  cm.setCursor(2, 2);
+  cm.setCursor(0, 0);
+  helpers.doKeys('`', '\'');
+  helpers.assertCursorAt(2, 2);
+  cm.setCursor(2, 0);
+  cm.replaceRange('   h', cm.getCursor());
+  cm.setCursor(0, 0);
+  helpers.doKeys('\'', '\'');
+  helpers.assertCursorAt(2, 3);
+});
 testVim('jumpToMark_next', function(cm, vim, helpers) {
   cm.setCursor(2, 2);
   helpers.doKeys('m', 't');
   cm.setCursor(0, 0);
   helpers.doKeys(']', '`');
   helpers.assertCursorAt(2, 2);
   cm.setCursor(0, 0);
   helpers.doKeys(']', '\'');
@@ -1844,17 +1896,17 @@ testVim('delmark_all', function(cm, vim,
   helpers.doKeys('`', 'd');
   helpers.assertCursorAt(0, 0);
   helpers.doKeys('`', 'e');
   helpers.assertCursorAt(0, 0);
 });
 testVim('visual', function(cm, vim, helpers) {
   helpers.doKeys('l', 'v', 'l', 'l');
   helpers.assertCursorAt(0, 4);
-  eqPos(makeCursor(0, 1), cm.getCursor('anchor'));
+  eqCursorPos(makeCursor(0, 1), cm.getCursor('anchor'));
   helpers.doKeys('d');
   eq('15', cm.getValue());
 }, { value: '12345' });
 testVim('visual_yank', function(cm, vim, helpers) {
   helpers.doKeys('v', '3', 'l', 'y');
   helpers.assertCursorAt(0, 0);
   helpers.doKeys('p');
   eq('aa te test for yank', cm.getValue());
@@ -1876,34 +1928,34 @@ testVim('visual_crossover_left', functio
 testVim('visual_crossover_left', function(cm, vim, helpers) {
   cm.setCursor(0, 2);
   helpers.doKeys('v', 'h', 'l', 'l');
   cm.getSelection('os');
 }, { value: 'cross'});
 testVim('visual_crossover_up', function(cm, vim, helpers) {
   cm.setCursor(3, 2);
   helpers.doKeys('v', 'j', 'k', 'k');
-  eqPos(Pos(2, 2), cm.getCursor('head'));
-  eqPos(Pos(3, 3), cm.getCursor('anchor'));
+  eqCursorPos(Pos(2, 2), cm.getCursor('head'));
+  eqCursorPos(Pos(3, 3), cm.getCursor('anchor'));
   helpers.doKeys('k');
-  eqPos(Pos(1, 2), cm.getCursor('head'));
-  eqPos(Pos(3, 3), cm.getCursor('anchor'));
+  eqCursorPos(Pos(1, 2), cm.getCursor('head'));
+  eqCursorPos(Pos(3, 3), cm.getCursor('anchor'));
 }, { value: 'cross\ncross\ncross\ncross\ncross\n'});
 testVim('visual_crossover_down', function(cm, vim, helpers) {
   cm.setCursor(1, 2);
   helpers.doKeys('v', 'k', 'j', 'j');
-  eqPos(Pos(2, 3), cm.getCursor('head'));
-  eqPos(Pos(1, 2), cm.getCursor('anchor'));
+  eqCursorPos(Pos(2, 3), cm.getCursor('head'));
+  eqCursorPos(Pos(1, 2), cm.getCursor('anchor'));
   helpers.doKeys('j');
-  eqPos(Pos(3, 3), cm.getCursor('head'));
-  eqPos(Pos(1, 2), cm.getCursor('anchor'));
+  eqCursorPos(Pos(3, 3), cm.getCursor('head'));
+  eqCursorPos(Pos(1, 2), cm.getCursor('anchor'));
 }, { value: 'cross\ncross\ncross\ncross\ncross\n'});
 testVim('visual_exit', function(cm, vim, helpers) {
   helpers.doKeys('<C-v>', 'l', 'j', 'j', '<Esc>');
-  eqPos(cm.getCursor('anchor'), cm.getCursor('head'));
+  eqCursorPos(cm.getCursor('anchor'), cm.getCursor('head'));
   eq(vim.visualMode, false);
 }, { value: 'hello\nworld\nfoo' });
 testVim('visual_line', function(cm, vim, helpers) {
   helpers.doKeys('l', 'V', 'l', 'j', 'j', 'd');
   eq(' 4\n 5', cm.getValue());
 }, { value: ' 1\n 2\n 3\n 4\n 5' });
 testVim('visual_block_move_to_eol', function(cm, vim, helpers) {
   // moveToEol should move all block cursors to end of line
@@ -1949,17 +2001,17 @@ testVim('visual_block_corners', function
   selections = cm.getSelections();
   eq('891cde', selections.join(''));
 }, {value: '12345\n67891\nabcde'});
 testVim('visual_block_mode_switch', function(cm, vim, helpers) {
   // switch between visual modes
   cm.setCursor(1, 1);
   // blockwise to characterwise visual
   helpers.doKeys('<C-v>', 'j', 'l', 'v');
-  selections = cm.getSelections();
+  var selections = cm.getSelections();
   eq('7891\nabc', selections.join(''));
   // characterwise to blockwise
   helpers.doKeys('<C-v>');
   selections = cm.getSelections();
   eq('78bc', selections.join(''));
   // blockwise to linewise visual
   helpers.doKeys('V');
   selections = cm.getSelections();
@@ -1976,17 +2028,17 @@ testVim('visual_block_crossing_short_lin
   eq('4', selections);
   helpers.doKeys('5', 'j', 'k');
   selections = cm.getSelections().join("");
   eq(10, selections.length);
 }, {value: '123456\n78\nabcdefg\nfoobar\n}\n'});
 testVim('visual_block_curPos_on_exit', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('<C-v>', '3' , 'l', '<Esc>');
-  eqPos(makeCursor(0, 3), cm.getCursor());
+  eqCursorPos(makeCursor(0, 3), cm.getCursor());
   helpers.doKeys('h', '<C-v>', '2' , 'j' ,'3' , 'l');
   eq(cm.getSelections().join(), "3456,,cdef");
   helpers.doKeys('4' , 'h');
   eq(cm.getSelections().join(), "23,8,bc");
   helpers.doKeys('2' , 'l');
   eq(cm.getSelections().join(), "34,,cd");
 }, {value: '123456\n78\nabcdefg\nfoobar'});
 
@@ -2011,57 +2063,57 @@ testVim('visual_join_2', function(cm, vi
 }, { value: '1\n2\n3\n4\n5\n6\n'});
 testVim('visual_blank', function(cm, vim, helpers) {
   helpers.doKeys('v', 'k');
   eq(vim.visualMode, true);
 }, { value: '\n' });
 testVim('reselect_visual', function(cm, vim, helpers) {
   helpers.doKeys('l', 'v', 'l', 'l', 'l', 'y', 'g', 'v');
   helpers.assertCursorAt(0, 5);
-  eqPos(makeCursor(0, 1), cm.getCursor('anchor'));
+  eqCursorPos(makeCursor(0, 1), cm.getCursor('anchor'));
   helpers.doKeys('v');
   cm.setCursor(1, 0);
   helpers.doKeys('v', 'l', 'l', 'p');
   eq('123456\n2345\nbar', cm.getValue());
   cm.setCursor(0, 0);
   helpers.doKeys('g', 'v');
   // here the fake cursor is at (1, 3)
   helpers.assertCursorAt(1, 4);
-  eqPos(makeCursor(1, 0), cm.getCursor('anchor'));
+  eqCursorPos(makeCursor(1, 0), cm.getCursor('anchor'));
   helpers.doKeys('v');
   cm.setCursor(2, 0);
   helpers.doKeys('v', 'l', 'l', 'g', 'v');
   helpers.assertCursorAt(1, 4);
-  eqPos(makeCursor(1, 0), cm.getCursor('anchor'));
+  eqCursorPos(makeCursor(1, 0), cm.getCursor('anchor'));
   helpers.doKeys('g', 'v');
   helpers.assertCursorAt(2, 3);
-  eqPos(makeCursor(2, 0), cm.getCursor('anchor'));
+  eqCursorPos(makeCursor(2, 0), cm.getCursor('anchor'));
   eq('123456\n2345\nbar', cm.getValue());
 }, { value: '123456\nfoo\nbar' });
 testVim('reselect_visual_line', function(cm, vim, helpers) {
   helpers.doKeys('l', 'V', 'j', 'j', 'V', 'g', 'v', 'd');
   eq('foo\nand\nbar', cm.getValue());
   cm.setCursor(1, 0);
   helpers.doKeys('V', 'y', 'j');
   helpers.doKeys('V', 'p' , 'g', 'v', 'd');
   eq('foo\nand', cm.getValue());
 }, { value: 'hello\nthis\nis\nfoo\nand\nbar' });
 testVim('reselect_visual_block', function(cm, vim, helpers) {
   cm.setCursor(1, 2);
   helpers.doKeys('<C-v>', 'k', 'h', '<C-v>');
   cm.setCursor(2, 1);
   helpers.doKeys('v', 'l', 'g', 'v');
-  eqPos(Pos(1, 2), vim.sel.anchor);
-  eqPos(Pos(0, 1), vim.sel.head);
+  eqCursorPos(Pos(1, 2), vim.sel.anchor);
+  eqCursorPos(Pos(0, 1), vim.sel.head);
   // Ensure selection is done with visual block mode rather than one
   // continuous range.
   eq(cm.getSelections().join(''), '23oo')
   helpers.doKeys('g', 'v');
-  eqPos(Pos(2, 1), vim.sel.anchor);
-  eqPos(Pos(2, 2), vim.sel.head);
+  eqCursorPos(Pos(2, 1), vim.sel.anchor);
+  eqCursorPos(Pos(2, 2), vim.sel.head);
   helpers.doKeys('<Esc>');
   // Ensure selection of deleted range
   cm.setCursor(1, 1);
   helpers.doKeys('v', '<C-v>', 'j', 'd', 'g', 'v');
   eq(cm.getSelections().join(''), 'or');
 }, { value: '123456\nfoo\nbar' });
 testVim('s_normal', function(cm, vim, helpers) {
   cm.setCursor(0, 1);
@@ -2086,24 +2138,24 @@ testVim('o_visual', function(cm, vim, he
   helpers.doKeys('l','l')
   helpers.assertCursorAt(3, 3);
   helpers.doKeys('d');
   eq('p',cm.getValue());
 }, { value: 'abcd\nefgh\nijkl\nmnop'});
 testVim('o_visual_block', function(cm, vim, helpers) {
   cm.setCursor(0, 1);
   helpers.doKeys('<C-v>','3','j','l','l', 'o');
-  eqPos(Pos(3, 3), vim.sel.anchor);
-  eqPos(Pos(0, 1), vim.sel.head);
+  eqCursorPos(Pos(3, 3), vim.sel.anchor);
+  eqCursorPos(Pos(0, 1), vim.sel.head);
   helpers.doKeys('O');
-  eqPos(Pos(3, 1), vim.sel.anchor);
-  eqPos(Pos(0, 3), vim.sel.head);
+  eqCursorPos(Pos(3, 1), vim.sel.anchor);
+  eqCursorPos(Pos(0, 3), vim.sel.head);
   helpers.doKeys('o');
-  eqPos(Pos(0, 3), vim.sel.anchor);
-  eqPos(Pos(3, 1), vim.sel.head);
+  eqCursorPos(Pos(0, 3), vim.sel.anchor);
+  eqCursorPos(Pos(3, 1), vim.sel.head);
 }, { value: 'abcd\nefgh\nijkl\nmnop'});
 testVim('changeCase_visual', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('v', 'l', 'l');
   helpers.doKeys('U');
   helpers.assertCursorAt(0, 0);
   helpers.doKeys('v', 'l', 'l');
   helpers.doKeys('u');
@@ -2323,22 +2375,18 @@ testVim('/_greedy_0_or_more', function(c
   helpers.doKeys('n');
   helpers.assertCursorAt(0, 0);
 }, { value: 'aaa  aa\n aa'});
 testVim('?_greedy_0_or_more', function(cm, vim, helpers) {
   cm.openDialog = helpers.fakeOpenDialog('a*');
   helpers.doKeys('?');
   helpers.assertCursorAt(1, 1);
   helpers.doKeys('n');
-  helpers.assertCursorAt(1, 0);
-  helpers.doKeys('n');
   helpers.assertCursorAt(0, 5);
   helpers.doKeys('n');
-  helpers.assertCursorAt(0, 4);
-  helpers.doKeys('n');
   helpers.assertCursorAt(0, 3);
   helpers.doKeys('n');
   helpers.assertCursorAt(0, 0);
 }, { value: 'aaa  aa\n aa'});
 testVim('? and n/N', function(cm, vim, helpers) {
   cm.openDialog = helpers.fakeOpenDialog('match');
   helpers.doKeys('?');
   helpers.assertCursorAt(1, 6);
@@ -2533,16 +2581,24 @@ testVim('macro_search_2f', function(cm, 
   cm.setCursor(0, 0);
   helpers.doKeys('q', 'a', '2', 'f', ' ');
   helpers.assertCursorAt(0,9);
   helpers.doKeys('q', '0');
   helpers.assertCursorAt(0,0);
   helpers.doKeys('@', 'a');
   helpers.assertCursorAt(0,9);
 }, { value: 'The quick brown fox jumped over the lazy dog.'});
+testVim('macro_yank_tick', function(cm, vim, helpers) {
+  cm.setCursor(0, 0);
+  // Start recording a macro into the \' register.
+  helpers.doKeys('q', '\'');
+  helpers.doKeys('y', '<Right>', '<Right>', '<Right>', '<Right>', 'p');
+  helpers.assertCursorAt(0,4);
+  eq('the tex parrot', cm.getValue());
+}, { value: 'the ex parrot'});
 testVim('yank_register', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('"', 'a', 'y', 'y');
   helpers.doKeys('j', '"', 'b', 'y', 'y');
   cm.openDialog = helpers.fakeOpenDialog('registers');
   cm.openNotification = helpers.fakeOpenNotification(function(text) {
     is(/a\s+foo/.test(text));
     is(/b\s+bar/.test(text));
@@ -2810,16 +2866,24 @@ testVim('._repeat', function(cm, vim, he
 }, { value: '1 2 3 4 5 6'});
 testVim('._insert', function(cm, vim, helpers) {
   helpers.doKeys('i');
   cm.replaceRange('test', cm.getCursor());
   helpers.doKeys('<Esc>');
   helpers.doKeys('.');
   eq('testestt', cm.getValue());
   helpers.assertCursorAt(0, 6);
+  helpers.doKeys('O');
+  cm.replaceRange('xyz', cm.getCursor());
+  helpers.doInsertModeKeys('Backspace');
+  helpers.doInsertModeKeys('Down');
+  helpers.doKeys('<Esc>');
+  helpers.doKeys('.');
+  eq('xy\nxy\ntestestt', cm.getValue());
+  helpers.assertCursorAt(1, 1);
 }, { value: ''});
 testVim('._insert_repeat', function(cm, vim, helpers) {
   helpers.doKeys('i');
   cm.replaceRange('test', cm.getCursor());
   cm.setCursor(0, 4);
   helpers.doKeys('<Esc>');
   helpers.doKeys('2', '.');
   eq('testesttestt', cm.getValue());
@@ -2904,16 +2968,30 @@ testVim('._delete_repeat', function(cm, 
 testVim('._visual_>', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('V', 'j', '>');
   cm.setCursor(2, 0)
   helpers.doKeys('.');
   eq('  1\n  2\n  3\n  4', cm.getValue());
   helpers.assertCursorAt(2, 2);
 }, { value: '1\n2\n3\n4'});
+testVim('._replace_repeat', function(cm, vim, helpers) {
+  helpers.doKeys('R');
+  cm.replaceRange('123', cm.getCursor(), offsetCursor(cm.getCursor(), 0, 3));
+  cm.setCursor(0, 3);
+  helpers.doKeys('<Esc>');
+  helpers.doKeys('2', '.');
+  eq('12123123\nabcdefg', cm.getValue());
+  helpers.assertCursorAt(0, 7);
+  cm.setCursor(1, 0);
+  helpers.doKeys('.');
+  eq('12123123\n123123g', cm.getValue());
+  helpers.doKeys('l', '"', '.', 'p');
+  eq('12123123\n123123g123', cm.getValue());
+}, { value: 'abcdef\nabcdefg'});
 testVim('f;', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doKeys('f', 'x');
   helpers.doKeys(';');
   helpers.doKeys('2', ';');
   eq(9, cm.getCursor().ch);
 }, { value: '01x3xx678x'});
 testVim('F;', function(cm, vim, helpers) {
@@ -3351,22 +3429,66 @@ testVim('[m, ]m, [M, ]M', function(cm, v
   helpers.doKeys('[', 'M');
   helpers.assertCursorAt(9,1);
   helpers.doKeys('3', ']', 'M');
   helpers.assertCursorAt(15,0);
   helpers.doKeys('5', '[', 'M');
   helpers.assertCursorAt(7,3);
 }, { value: squareBracketMotionSandbox});
 
+testVim('i_indent_right', function(cm, vim, helpers) {
+  cm.setCursor(0, 3);
+  var expectedValue = '   word1\nword2\nword3 ';
+  helpers.doKeys('i', '<C-t>');
+  eq(expectedValue, cm.getValue());
+  helpers.assertCursorAt(0, 5);
+}, { value: ' word1\nword2\nword3 ', indentUnit: 2 });
+testVim('i_indent_left', function(cm, vim, helpers) {
+  cm.setCursor(0, 3);
+  var expectedValue = ' word1\nword2\nword3 ';
+  helpers.doKeys('i', '<C-d>');
+  eq(expectedValue, cm.getValue());
+  helpers.assertCursorAt(0, 1);
+}, { value: '   word1\nword2\nword3 ', indentUnit: 2 });
+
 // Ex mode tests
 testVim('ex_go_to_line', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doEx('4');
   helpers.assertCursorAt(3, 0);
 }, { value: 'a\nb\nc\nd\ne\n'});
+testVim('ex_go_to_mark', function(cm, vim, helpers) {
+  cm.setCursor(3, 0);
+  helpers.doKeys('m', 'a');
+  cm.setCursor(0, 0);
+  helpers.doEx('\'a');
+  helpers.assertCursorAt(3, 0);
+}, { value: 'a\nb\nc\nd\ne\n'});
+testVim('ex_go_to_line_offset', function(cm, vim, helpers) {
+  cm.setCursor(0, 0);
+  helpers.doEx('+3');
+  helpers.assertCursorAt(3, 0);
+  helpers.doEx('-1');
+  helpers.assertCursorAt(2, 0);
+  helpers.doEx('.2');
+  helpers.assertCursorAt(4, 0);
+  helpers.doEx('.-3');
+  helpers.assertCursorAt(1, 0);
+}, { value: 'a\nb\nc\nd\ne\n'});
+testVim('ex_go_to_mark_offset', function(cm, vim, helpers) {
+  cm.setCursor(2, 0);
+  helpers.doKeys('m', 'a');
+  cm.setCursor(0, 0);
+  helpers.doEx('\'a1');
+  helpers.assertCursorAt(3, 0);
+  helpers.doEx('\'a-1');
+  helpers.assertCursorAt(1, 0);
+  helpers.doEx('\'a+2');
+  helpers.assertCursorAt(4, 0);
+}, { value: 'a\nb\nc\nd\ne\n'});
 testVim('ex_write', function(cm, vim, helpers) {
   var tmp = CodeMirror.commands.save;
   var written;
   var actualCm;
   CodeMirror.commands.save = function(cm) {
     written = true;
     actualCm = cm;
   };
@@ -3419,34 +3541,54 @@ testVim('ex_sort_decimal_reverse', funct
   eq('.9\n6\n s5\nd3', cm.getValue());
 }, { value: '6\nd3\n s5\n.9'});
 testVim('ex_sort_hex', function(cm, vim, helpers) {
   helpers.doEx('sort x');
   eq(' s5\n6\n.9\n&0xB\nd3', cm.getValue());
 }, { value: '6\nd3\n s5\n&0xB\n.9'});
 testVim('ex_sort_octal', function(cm, vim, helpers) {
   helpers.doEx('sort o');
-  eq('.8\n.9\nd3\n s5\n6', cm.getValue());
+  eq('.9\n.8\nd3\n s5\n6', cm.getValue());
 }, { value: '6\nd3\n s5\n.9\n.8'});
 testVim('ex_sort_decimal_mixed', function(cm, vim, helpers) {
   helpers.doEx('sort d');
-  eq('y\nz\nc1\nb2\na3', cm.getValue());
+  eq('z\ny\nc1\nb2\na3', cm.getValue());
 }, { value: 'a3\nz\nc1\ny\nb2'});
 testVim('ex_sort_decimal_mixed_reverse', function(cm, vim, helpers) {
   helpers.doEx('sort! d');
   eq('a3\nb2\nc1\nz\ny', cm.getValue());
 }, { value: 'a3\nz\nc1\ny\nb2'});
-testVim('ex_sort_patterns_not_supported', function(cm, vim, helpers) {
-  var notified = false;
-  cm.openNotification = helpers.fakeOpenNotification(function(text) {
-    notified = /patterns not supported/.test(text);
-  });
-  helpers.doEx('sort /abc/');
-  is(notified, 'No notification.');
-});
+testVim('ex_sort_pattern_alpha', function(cm, vim, helpers) {
+  helpers.doEx('sort /[a-z]/');
+  eq('a3\nb2\nc1\ny\nz', cm.getValue());
+}, { value: 'z\ny\nc1\nb2\na3'});
+testVim('ex_sort_pattern_alpha_reverse', function(cm, vim, helpers) {
+  helpers.doEx('sort! /[a-z]/');
+  eq('z\ny\nc1\nb2\na3', cm.getValue());
+}, { value: 'z\ny\nc1\nb2\na3'});
+testVim('ex_sort_pattern_alpha_ignoreCase', function(cm, vim, helpers) {
+  helpers.doEx('sort i/[a-z]/');
+  eq('a3\nb2\nC1\nY\nz', cm.getValue());
+}, { value: 'z\nY\nC1\nb2\na3'});
+testVim('ex_sort_pattern_alpha_longer', function(cm, vim, helpers) {
+  helpers.doEx('sort /[a-z]+/');
+  eq('a\naa\nab\nade\nadele\nadelle\nadriana\nalex\nalexandra\nb\nc\ny\nz', cm.getValue());
+}, { value: 'z\nab\naa\nade\nadelle\nalexandra\nalex\nadriana\nadele\ny\nc\nb\na'});
+testVim('ex_sort_pattern_alpha_only', function(cm, vim, helpers) {
+  helpers.doEx('sort /^[a-z]$/');
+  eq('z1\ny2\na3\nb\nc', cm.getValue());
+}, { value: 'z1\ny2\na3\nc\nb'});
+testVim('ex_sort_pattern_alpha_only_reverse', function(cm, vim, helpers) {
+  helpers.doEx('sort! /^[a-z]$/');
+  eq('c\nb\nz1\ny2\na3', cm.getValue());
+}, { value: 'z1\ny2\na3\nc\nb'});
+testVim('ex_sort_pattern_alpha_num', function(cm, vim, helpers) {
+  helpers.doEx('sort /[a-z][0-9]/');
+  eq('c\nb\na3\ny2\nz1', cm.getValue());
+}, { value: 'z1\ny2\na3\nc\nb'});
 // test for :global command
 testVim('ex_global', function(cm, vim, helpers) {
   cm.setCursor(0, 0);
   helpers.doEx('g/one/s//two');
   eq('two two\n two two\n two two', cm.getValue());
   helpers.doEx('1,2g/two/s//one');
   eq('one one\n one one\n two two', cm.getValue());
 }, {value: 'one one\n one one\n one one'});
@@ -3488,16 +3630,60 @@ testVim('ex_substitute_full_file', funct
   helpers.doEx('%s/one/two/g');
   eq('two two\n two two', cm.getValue());
 }, { value: 'one one\n one one'});
 testVim('ex_substitute_input_range', function(cm, vim, helpers) {
   cm.setCursor(1, 0);
   helpers.doEx('1,3s/\\d/0/g');
   eq('0\n0\n0\n4', cm.getValue());
 }, { value: '1\n2\n3\n4' });
+testVim('ex_substitute_range_current_to_input', function(cm, vim, helpers) {
+  cm.setCursor(1, 0);
+  helpers.doEx('.,3s/\\d/0/g');
+  eq('1\n0\n0\n4', cm.getValue());
+}, { value: '1\n2\n3\n4' });
+testVim('ex_substitute_range_input_to_current', function(cm, vim, helpers) {
+  cm.setCursor(3, 0);
+  helpers.doEx('2,.s/\\d/0/g');
+  eq('1\n0\n0\n0\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_range_offset', function(cm, vim, helpers) {
+  cm.setCursor(2, 0);
+  helpers.doEx('-1,+1s/\\d/0/g');
+  eq('1\n0\n0\n0\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_range_implicit_offset', function(cm, vim, helpers) {
+  cm.setCursor(0, 0);
+  helpers.doEx('.1,.3s/\\d/0/g');
+  eq('1\n0\n0\n0\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_to_eof', function(cm, vim, helpers) {
+  cm.setCursor(2, 0);
+  helpers.doEx('.,$s/\\d/0/g');
+  eq('1\n2\n0\n0\n0', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_to_relative_eof', function(cm, vim, helpers) {
+  cm.setCursor(4, 0);
+  helpers.doEx('2,$-2s/\\d/0/g');
+  eq('1\n0\n0\n4\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_range_mark', function(cm, vim, helpers) {
+  cm.setCursor(2, 0);
+  helpers.doKeys('ma');
+  cm.setCursor(0, 0);
+  helpers.doEx('.,\'as/\\d/0/g');
+  eq('0\n0\n0\n4\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
+testVim('ex_substitute_range_mark_offset', function(cm, vim, helpers) {
+  cm.setCursor(2, 0);
+  helpers.doKeys('ma');
+  cm.setCursor(0, 0);
+  helpers.doEx('\'a-1,\'a+1s/\\d/0/g');
+  eq('1\n0\n0\n0\n5', cm.getValue());
+}, { value: '1\n2\n3\n4\n5' });
 testVim('ex_substitute_visual_range', function(cm, vim, helpers) {
   cm.setCursor(1, 0);
   // Set last visual mode selection marks '< and '> at lines 2 and 4
   helpers.doKeys('V', '2', 'j', 'v');
   helpers.doEx('\'<,\'>s/\\d/0/g');
   eq('1\n0\n0\n0\n5', cm.getValue());
 }, { value: '1\n2\n3\n4\n5' });
 testVim('ex_substitute_empty_query', function(cm, vim, helpers) {
@@ -3598,16 +3784,24 @@ testSubstitute('ex_substitute_slash_repl
 testSubstitute('ex_substitute_backslash_replacement', {
   value: 'one,two \n three,four',
   expectedValue: 'one\\two \n three\\four',
   expr: '%s/,/\\\\/g'});
 testSubstitute('ex_substitute_multibackslash_replacement', {
   value: 'one,two \n three,four',
   expectedValue: 'one\\\\\\\\two \n three\\\\\\\\four', // 2*8 backslashes.
   expr: '%s/,/\\\\\\\\\\\\\\\\/g'}); // 16 backslashes.
+testSubstitute('ex_substitute_dollar_match', {
+  value: 'one,two \n three,four',
+  expectedValue: 'one,two ,\n three,four',
+  expr: '%s/$/,/g'});
+testSubstitute('ex_substitute_newline_match', {
+  value: 'one,two \n three,four',
+  expectedValue: 'one,two , three,four',
+  expr: '%s/\\n/,/g'});
 testSubstitute('ex_substitute_newline_replacement', {
   value: 'one,two \n three,four',
   expectedValue: 'one\ntwo \n three\nfour',
   expr: '%s/,/\\n/g'});
 testSubstitute('ex_substitute_braces_word', {
   value: 'ababab abb ab{2}',
   expectedValue: 'ab abb ab{2}',
   expr: '%s/(ab){2}//g',
@@ -3736,61 +3930,61 @@ testVim('ex_yank', function (cm, vim, he
 testVim('set_boolean', function(cm, vim, helpers) {
   CodeMirror.Vim.defineOption('testoption', true, 'boolean');
   // Test default value is set.
   is(CodeMirror.Vim.getOption('testoption'));
   try {
     // Test fail to set to non-boolean
     CodeMirror.Vim.setOption('testoption', '5');
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   // Test setOption
   CodeMirror.Vim.setOption('testoption', false);
   is(!CodeMirror.Vim.getOption('testoption'));
 });
 testVim('ex_set_boolean', function(cm, vim, helpers) {
   CodeMirror.Vim.defineOption('testoption', true, 'boolean');
   // Test default value is set.
   is(CodeMirror.Vim.getOption('testoption'));
   try {
     // Test fail to set to non-boolean
     helpers.doEx('set testoption=22');
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   // Test setOption
   helpers.doEx('set notestoption');
   is(!CodeMirror.Vim.getOption('testoption'));
 });
 testVim('set_string', function(cm, vim, helpers) {
   CodeMirror.Vim.defineOption('testoption', 'a', 'string');
   // Test default value is set.
   eq('a', CodeMirror.Vim.getOption('testoption'));
   try {
     // Test fail to set non-string.
     CodeMirror.Vim.setOption('testoption', true);
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   try {
     // Test fail to set 'notestoption'
     CodeMirror.Vim.setOption('notestoption', 'b');
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   // Test setOption
   CodeMirror.Vim.setOption('testoption', 'c');
   eq('c', CodeMirror.Vim.getOption('testoption'));
 });
 testVim('ex_set_string', function(cm, vim, helpers) {
   CodeMirror.Vim.defineOption('testopt', 'a', 'string');
   // Test default value is set.
   eq('a', CodeMirror.Vim.getOption('testopt'));
   try {
     // Test fail to set 'notestopt'
     helpers.doEx('set notestopt=b');
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   // Test setOption
   helpers.doEx('set testopt=c')
   eq('c', CodeMirror.Vim.getOption('testopt'));
   helpers.doEx('set testopt=c')
   eq('c', CodeMirror.Vim.getOption('testopt', cm)); //local || global
   eq('c', CodeMirror.Vim.getOption('testopt', cm, {scope: 'local'})); // local
   eq('c', CodeMirror.Vim.getOption('testopt', cm, {scope: 'global'})); // global
   eq('c', CodeMirror.Vim.getOption('testopt')); // global
@@ -3830,17 +4024,17 @@ testVim('ex_set_callback', function(cm, 
 
   CodeMirror.Vim.defineOption('testopt', 'a', 'string', cb);
   // Test default value is set.
   eq('a', CodeMirror.Vim.getOption('testopt'));
   try {
     // Test fail to set 'notestopt'
     helpers.doEx('set notestopt=b');
     fail();
-  } catch (expected) {};
+  } catch (expected) {}
   // Test setOption (Identical to the string tests, but via callback instead)
   helpers.doEx('set testopt=c')
   eq('c', CodeMirror.Vim.getOption('testopt', cm)); //local || global
   eq('c', CodeMirror.Vim.getOption('testopt', cm, {scope: 'local'})); // local
   eq('c', CodeMirror.Vim.getOption('testopt', cm, {scope: 'global'})); // global
   eq('c', CodeMirror.Vim.getOption('testopt')); // global
   // Test setOption global
   helpers.doEx('setg testopt=d')
@@ -3967,17 +4161,27 @@ testVim('ex_map_key2key_visual_api', fun
   CodeMirror.commands.save = tmp;
 });
 testVim('ex_imap', function(cm, vim, helpers) {
   CodeMirror.Vim.map('jk', '<Esc>', 'insert');
   helpers.doKeys('i');
   is(vim.insertMode);
   helpers.doKeys('j', 'k');
   is(!vim.insertMode);
-});
+  cm.setCursor(0, 1);
+  CodeMirror.Vim.map('jj', '<Esc>', 'insert');
+  helpers.doKeys('<C-v>', '2', 'j', 'l', 'c');
+  var replacement = fillArray('fo', 3);
+  cm.replaceSelections(replacement);
+  eq('1fo4\n5fo8\nafodefg', cm.getValue());
+  helpers.doKeys('j', 'j');
+  cm.setCursor(0, 0);
+  helpers.doKeys('.');
+  eq('foo4\nfoo8\nfoodefg', cm.getValue());
+}, { value: '1234\n5678\nabcdefg' });
 testVim('ex_unmap_api', function(cm, vim, helpers) {
   CodeMirror.Vim.map('<Alt-X>', 'gg', 'normal');
   is(CodeMirror.Vim.handleKey(cm, "<Alt-X>", "normal"), "Alt-X key is mapped");
   CodeMirror.Vim.unmap("<Alt-X>", "normal");
   is(!CodeMirror.Vim.handleKey(cm, "<Alt-X>", "normal"), "Alt-X key is unmapped");
 });
 
 // Testing registration of functions as ex-commands and mapping to <Key>-keys
@@ -4000,12 +4204,12 @@ testVim('ex_map_key2key_from_colon', fun
   helpers.doKeys(':');
   helpers.assertCursorAt(0, 0);
   eq('bc', cm.getValue());
 }, { value: 'abc' });
 
 // Test event handlers
 testVim('beforeSelectionChange', function(cm, vim, helpers) {
   cm.setCursor(0, 100);
-  eqPos(cm.getCursor('head'), cm.getCursor('anchor'));
+  eqCursorPos(cm.getCursor('head'), cm.getCursor('anchor'));
 }, { value: 'abc' });