Bug 1468667 - [webext] Add basics of 'windows' namespace r?jorgk draft
authorGeoff Lankow <geoff@darktrojan.net>
Thu, 14 Jun 2018 14:03:27 +1200
changeset 24805 e59e5962f4875cdf4c2a33ee5337de9c5c757a5c
parent 24804 48a48c1807458b93e4e0d7c17e651727922bfd30
push id215
push userbmo:geoff@darktrojan.net
push dateThu, 14 Jun 2018 02:05:26 +0000
reviewersjorgk
bugs1468667
Bug 1468667 - [webext] Add basics of 'windows' namespace r?jorgk MozReview-Commit-ID: 5niCqrYHHEB
mail/components/extensions/ext-messenger.json
mail/components/extensions/extensions-messenger.manifest
mail/components/extensions/jar.mn
mail/components/extensions/moz.build
mail/components/extensions/parent/ext-messenger.js
mail/components/extensions/parent/ext-windows.js
mail/components/extensions/schemas/jar.mn
mail/components/extensions/schemas/moz.build
mail/components/extensions/schemas/windows.json
new file mode 100644
--- /dev/null
+++ b/mail/components/extensions/ext-messenger.json
@@ -0,0 +1,10 @@
+{
+  "windows": {
+    "url": "chrome://messenger/content/parent/ext-windows.js",
+    "schema": "chrome://messenger/content/schemas/windows.json",
+    "scopes": ["addon_parent"],
+    "paths": [
+      ["windows"]
+    ]
+  }
+}
--- a/mail/components/extensions/extensions-messenger.manifest
+++ b/mail/components/extensions/extensions-messenger.manifest
@@ -1,1 +1,3 @@
+category webextension-modules messenger chrome://messenger/content/ext-messenger.json
+
 category webextension-scripts messenger chrome://messenger/content/parent/ext-messenger.js
--- a/mail/components/extensions/jar.mn
+++ b/mail/components/extensions/jar.mn
@@ -1,6 +1,8 @@
 # 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/.
 
 messenger.jar:
+    content/messenger/ext-messenger.json
     content/messenger/parent/ext-messenger.js (parent/ext-messenger.js)
+    content/messenger/parent/ext-windows.js (parent/ext-windows.js)
--- a/mail/components/extensions/moz.build
+++ b/mail/components/extensions/moz.build
@@ -4,8 +4,10 @@
 # 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/.
 
 JAR_MANIFESTS += ['jar.mn']
 
 EXTRA_COMPONENTS += [
     'extensions-messenger.manifest',
 ]
+
+DIRS += ['schemas']
--- a/mail/components/extensions/parent/ext-messenger.js
+++ b/mail/components/extensions/parent/ext-messenger.js
@@ -47,16 +47,40 @@ tabTracker = {
   }
 };
 windowTracker = new WindowTracker();
 
 Object.assign(global, {tabTracker, windowTracker});
 
 class Window extends WindowBase {
   /**
+   * Converts this window object to a JSON-compatible object which may be
+   * returned to an extension, in the format required to be returned by
+   * WebExtension APIs.
+   *
+   * @returns {object}
+   */
+  convert() {
+    let result = {
+      id: this.id,
+      focused: this.focused,
+      top: this.top,
+      left: this.left,
+      width: this.width,
+      height: this.height,
+      type: this.type,
+      state: this.state,
+      alwaysOnTop: this.alwaysOnTop,
+      title: this._title,
+    };
+
+    return result;
+  }
+
+  /**
    * Update the geometry of the browser window.
    *
    * @param {Object} options
    *        An object containing new values for the window's geometry.
    * @param {integer} [options.left]
    *        The new pixel distance of the left side of the browser window from
    *        the left of the screen.
    * @param {integer} [options.top]
@@ -106,20 +130,16 @@ class Window extends WindowBase {
   get width() {
     return this.window.outerWidth;
   }
 
   get height() {
     return this.window.outerHeight;
   }
 
-  get incognito() {
-    return PrivateBrowsingUtils.isWindowPrivate(this.window);
-  }
-
   get alwaysOnTop() {
     return this.xulWindow.zLevel >= Ci.nsIXULWindow.raisedZ;
   }
 
   get isLastFocused() {
     return this.window === windowTracker.topWindow;
   }
 
@@ -174,20 +194,16 @@ class Window extends WindowBase {
       case "fullscreen":
         window.fullScreen = true;
         break;
 
       default:
         throw new Error(`Unexpected window state: ${state}`);
     }
   }
-
-  get activeTab() {
-    return null;
-  }
 }
 
 Object.assign(global, {Window});
 
 class WindowManager extends WindowManagerBase {
   get(windowId, context) {
     let window = windowTracker.getWindow(windowId, context);
 
new file mode 100644
--- /dev/null
+++ b/mail/components/extensions/parent/ext-windows.js
@@ -0,0 +1,249 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+var {
+  promiseObserved,
+} = ExtensionUtils;
+
+const onXULFrameLoaderCreated = ({target}) => {
+  target.messageManager.sendAsyncMessage("AllowScriptsToClose", {});
+};
+
+/**
+ * An event manager API provider which listens for a DOM event in any browser
+ * window, and calls the given listener function whenever an event is received.
+ * That listener function receives a `fire` object, which it can use to dispatch
+ * events to the extension, and a DOM event object.
+ *
+ * @param {BaseContext} context
+ *        The extension context which the event manager belongs to.
+ * @param {string} name
+ *        The API name of the event manager, e.g.,"runtime.onMessage".
+ * @param {string} event
+ *        The name of the DOM event to listen for.
+ * @param {function} listener
+ *        The listener function to call when a DOM event is received.
+ *
+ * @returns {object} An injectable api for the new event.
+ */
+function WindowEventManager(context, name, event, listener) {
+  let register = fire => {
+    let listener2 = listener.bind(null, fire);
+
+    windowTracker.addListener(event, listener2);
+    return () => {
+      windowTracker.removeListener(event, listener2);
+    };
+  };
+
+  return new EventManager({context, name, register}).api();
+}
+
+this.windows = class extends ExtensionAPI {
+  getAPI(context) {
+    let {extension} = context;
+
+    const {windowManager} = extension;
+
+    return {
+      windows: {
+        onCreated: WindowEventManager(context, "windows.onCreated", "domwindowopened", (fire, window) => {
+          fire.async(windowManager.convert(window));
+        }),
+
+        onRemoved: WindowEventManager(context, "windows.onRemoved", "domwindowclosed", (fire, window) => {
+          fire.async(windowTracker.getId(window));
+        }),
+
+        onFocusChanged: new EventManager({
+          context,
+          name: "windows.onFocusChanged",
+          register: fire => {
+            // Keep track of the last windowId used to fire an onFocusChanged event
+            let lastOnFocusChangedWindowId;
+
+            let listener = event => {
+              // Wait a tick to avoid firing a superfluous WINDOW_ID_NONE
+              // event when switching focus between two Firefox windows.
+              Promise.resolve().then(() => {
+                let window = Services.focus.activeWindow;
+                let windowId = window ? windowTracker.getId(window) : Window.WINDOW_ID_NONE;
+                if (windowId !== lastOnFocusChangedWindowId) {
+                  fire.async(windowId);
+                  lastOnFocusChangedWindowId = windowId;
+                }
+              });
+            };
+            windowTracker.addListener("focus", listener);
+            windowTracker.addListener("blur", listener);
+            return () => {
+              windowTracker.removeListener("focus", listener);
+              windowTracker.removeListener("blur", listener);
+            };
+          },
+        }).api(),
+
+        get: function(windowId) {
+          let window = windowTracker.getWindow(windowId, context);
+          if (!window) {
+            return Promise.reject({message: `Invalid window ID: ${windowId}`});
+          }
+          return Promise.resolve(windowManager.convert(window));
+        },
+
+        getCurrent: function() {
+          let window = windowTracker.topWindow;
+          return Promise.resolve(windowManager.convert(window));
+        },
+
+        getLastFocused: function() {
+          let window = windowTracker.topWindow;
+          return Promise.resolve(windowManager.convert(window));
+        },
+
+        getAll: function() {
+          let windows = [];
+          for (let win of windowManager.getAll()) {
+            windows.push(win.convert());
+          }
+          return windows;
+        },
+
+        create: function(createData) {
+          let needResize = (createData.left !== null || createData.top !== null ||
+                            createData.width !== null || createData.height !== null);
+
+          if (needResize) {
+            if (createData.state !== null && createData.state != "normal") {
+              return Promise.reject({message: `"state": "${createData.state}" may not be combined with "left", "top", "width", or "height"`});
+            }
+            createData.state = "normal";
+          }
+
+          function mkstr(s) {
+            let result = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
+            result.data = s;
+            return result;
+          }
+
+          let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
+
+          if (createData.tabId !== null) {
+            if (createData.url !== null) {
+              return Promise.reject({message: "`tabId` may not be used in conjunction with `url`"});
+            }
+
+            if (createData.allowScriptsToClose) {
+              return Promise.reject({message: "`tabId` may not be used in conjunction with `allowScriptsToClose`"});
+            }
+
+            let tab = tabTracker.getTab(createData.tabId);
+
+            args.appendElement(tab);
+          } else if (createData.url !== null) {
+            if (Array.isArray(createData.url)) {
+              let array = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
+              for (let url of createData.url) {
+                array.appendElement(mkstr(url));
+              }
+              args.appendElement(array);
+            } else {
+              args.appendElement(mkstr(createData.url));
+            }
+          }
+
+          let features = ["chrome"];
+
+          if (createData.type === null || createData.type == "normal") {
+            features.push("dialog=no", "all");
+          } else {
+            // All other types create "popup"-type windows by default.
+            features.push("dialog", "resizable", "minimizable", "centerscreen", "titlebar", "close");
+          }
+
+          let {allowScriptsToClose, url} = createData;
+          if (allowScriptsToClose === null) {
+            allowScriptsToClose = typeof url === "string" && url.startsWith("moz-extension://");
+          }
+
+          let window = Services.ww.openWindow(null, "chrome://browser/content/browser.xul", "_blank",
+                                              features.join(","), args);
+
+          let win = windowManager.getWrapper(window);
+          win.updateGeometry(createData);
+
+          // TODO: focused, type
+
+          return new Promise(resolve => {
+            window.addEventListener("load", function() {
+              resolve(promiseObserved("browser-delayed-startup-finished", win => win == window));
+            }, {once: true});
+          }).then(() => {
+            if (["minimized", "fullscreen", "docked", "normal", "maximized"].includes(createData.state)) {
+              win.state = createData.state;
+            }
+            if (allowScriptsToClose) {
+              for (let {linkedBrowser} of window.gBrowser.tabs) {
+                onXULFrameLoaderCreated({target: linkedBrowser});
+                // eslint-disable-next-line mozilla/balanced-listeners
+                linkedBrowser.addEventListener("XULFrameLoaderCreated", onXULFrameLoaderCreated);
+              }
+            }
+            if (createData.titlePreface !== null) {
+              win.setTitlePreface(createData.titlePreface);
+            }
+            return win.convert({populate: true});
+          });
+        },
+
+        update: function(windowId, updateInfo) {
+          if (updateInfo.state !== null && updateInfo.state != "normal") {
+            if (updateInfo.left !== null || updateInfo.top !== null ||
+                updateInfo.width !== null || updateInfo.height !== null) {
+              return Promise.reject({message: `"state": "${updateInfo.state}" may not be combined with "left", "top", "width", or "height"`});
+            }
+          }
+
+          let win = windowManager.get(windowId, context);
+          if (updateInfo.focused) {
+            Services.focus.activeWindow = win.window;
+          }
+
+          if (updateInfo.state !== null) {
+            win.state = updateInfo.state;
+          }
+
+          if (updateInfo.drawAttention) {
+            // Bug 1257497 - Firefox can't cancel attention actions.
+            win.window.getAttention();
+          }
+
+          win.updateGeometry(updateInfo);
+
+          if (updateInfo.titlePreface !== null) {
+            win.setTitlePreface(updateInfo.titlePreface);
+            win.window.gBrowser.updateTitlebar();
+          }
+
+          // TODO: All the other properties, focused=false...
+
+          return Promise.resolve(win.convert());
+        },
+
+        remove: function(windowId) {
+          let window = windowTracker.getWindow(windowId, context);
+          window.close();
+
+          return new Promise(resolve => {
+            let listener = () => {
+              windowTracker.removeListener("domwindowclosed", listener);
+              resolve();
+            };
+            windowTracker.addListener("domwindowclosed", listener);
+          });
+        },
+      },
+    };
+  }
+};
new file mode 100644
--- /dev/null
+++ b/mail/components/extensions/schemas/jar.mn
@@ -0,0 +1,6 @@
+# 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/.
+
+messenger.jar:
+    content/messenger/schemas/windows.json
new file mode 100644
--- /dev/null
+++ b/mail/components/extensions/schemas/moz.build
@@ -0,0 +1,7 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+JAR_MANIFESTS += ['jar.mn']
new file mode 100644
--- /dev/null
+++ b/mail/components/extensions/schemas/windows.json
@@ -0,0 +1,430 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+[
+  {
+    "namespace": "windows",
+    "description": "Use the <code>browser.windows</code> API to interact with browser windows. You can use this API to create, modify, and rearrange windows in the browser.",
+    "types": [
+      {
+        "id": "WindowType",
+        "type": "string",
+        "description": "The type of browser window this is. Under some circumstances a Window may not be assigned type property, for example when querying closed windows from the $(ref:sessions) API.",
+        "enum": ["normal", "popup", "panel", "app", "devtools"]
+      },
+      {
+        "id": "WindowState",
+        "type": "string",
+        "description": "The state of this browser window. Under some circumstances a Window may not be assigned state property, for example when querying closed windows from the $(ref:sessions) API.",
+        "enum": ["normal", "minimized", "maximized", "fullscreen", "docked"]
+      },
+      {
+        "id": "Window",
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "integer",
+            "optional": true,
+            "minimum": 0,
+            "description": "The ID of the window. Window IDs are unique within a browser session. Under some circumstances a Window may not be assigned an ID, for example when querying windows using the $(ref:sessions) API, in which case a session ID may be present."
+          },
+          "focused": {
+            "type": "boolean",
+            "description": "Whether the window is currently the focused window."
+          },
+          "top": {
+            "type": "integer",
+            "optional": true,
+            "description": "The offset of the window from the top edge of the screen in pixels. Under some circumstances a Window may not be assigned top property, for example when querying closed windows from the $(ref:sessions) API."
+          },
+          "left": {
+            "type": "integer",
+            "optional": true,
+            "description": "The offset of the window from the left edge of the screen in pixels. Under some circumstances a Window may not be assigned left property, for example when querying closed windows from the $(ref:sessions) API."
+          },
+          "width": {
+            "type": "integer",
+            "optional": true,
+            "description": "The width of the window, including the frame, in pixels. Under some circumstances a Window may not be assigned width property, for example when querying closed windows from the $(ref:sessions) API."
+          },
+          "height": {
+            "type": "integer",
+            "optional": true,
+            "description": "The height of the window, including the frame, in pixels. Under some circumstances a Window may not be assigned height property, for example when querying closed windows from the $(ref:sessions) API."
+          },
+          "type": {
+            "$ref": "WindowType",
+            "optional": true,
+            "description": "The type of browser window this is."
+          },
+          "state": {
+            "$ref": "WindowState",
+            "optional": true,
+            "description": "The state of this browser window."
+          },
+          "alwaysOnTop": {
+            "type": "boolean",
+            "description": "Whether the window is set to be always on top."
+          },
+          "sessionId": {
+            "type": "string",
+            "optional": true,
+            "description": "The session ID used to uniquely identify a Window obtained from the $(ref:sessions) API."
+          },
+          "title": {
+            "type": "string",
+            "optional": true,
+            "description": "The title of the window. Read-only."
+          }
+        }
+      },
+      {
+        "id": "CreateType",
+        "type": "string",
+        "description": "Specifies what type of browser window to create. The 'panel' and 'detached_panel' types create a popup unless the '--enable-panels' flag is set.",
+        "enum": ["normal", "popup", "panel", "detached_panel"]
+      }
+    ],
+    "properties": {
+      "WINDOW_ID_NONE": {
+        "value": -1,
+        "description": "The windowId value that represents the absence of a browser window."
+      },
+      "WINDOW_ID_CURRENT": {
+        "value": -2,
+        "description": "The windowId value that represents the $(topic:current-window)[current window]."
+      }
+    },
+    "functions": [
+      {
+        "name": "get",
+        "type": "function",
+        "description": "Gets details about a window.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "integer",
+            "name": "windowId",
+            "minimum": -2
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "name": "window",
+                "$ref": "Window"
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "getCurrent",
+        "type": "function",
+        "description": "Gets the $(topic:current-window)[current window].",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "name": "window",
+                "$ref": "Window"
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "getLastFocused",
+        "type": "function",
+        "description": "Gets the window that was most recently focused &mdash; typically the window 'on top'.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "name": "window",
+                "$ref": "Window"
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "getAll",
+        "type": "function",
+        "description": "Gets all windows.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "name": "windows",
+                "type": "array",
+                "items": { "$ref": "Window" }
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "create",
+        "type": "function",
+        "description": "Creates (opens) a new browser with any optional sizing, position or default URL provided.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "object",
+            "name": "createData",
+            "optional": true,
+            "default": {},
+            "properties": {
+              "url": {
+                "description": "A URL or array of URLs to open as tabs in the window. Fully-qualified URLs must include a scheme (i.e. 'http://www.google.com', not 'www.google.com'). Relative URLs will be relative to the current page within the extension. Defaults to the New Tab Page.",
+                "optional": true,
+                "choices": [
+                  { "type": "string", "format": "relativeUrl" },
+                  {
+                    "type": "array",
+                    "items": { "type": "string", "format": "relativeUrl" }
+                  }
+                ]
+              },
+              "tabId": {
+                "type": "integer",
+                "minimum": 0,
+                "optional": true,
+                "description": "The id of the tab for which you want to adopt to the new window."
+              },
+              "left": {
+                "type": "integer",
+                "optional": true,
+                "description": "The number of pixels to position the new window from the left edge of the screen. If not specified, the new window is offset naturally from the last focused window. This value is ignored for panels."
+              },
+              "top": {
+                "type": "integer",
+                "optional": true,
+                "description": "The number of pixels to position the new window from the top edge of the screen. If not specified, the new window is offset naturally from the last focused window. This value is ignored for panels."
+              },
+              "width": {
+                "type": "integer",
+                "minimum": 0,
+                "optional": true,
+                "description": "The width in pixels of the new window, including the frame. If not specified defaults to a natural width."
+              },
+              "height": {
+                "type": "integer",
+                "minimum": 0,
+                "optional": true,
+                "description": "The height in pixels of the new window, including the frame. If not specified defaults to a natural height."
+              },
+              "focused": {
+                "unsupported": true,
+                "type": "boolean",
+                "optional": true,
+                "description": "If true, opens an active window. If false, opens an inactive window."
+              },
+              "type": {
+                "$ref": "CreateType",
+                "optional": true,
+                "description": "Specifies what type of browser window to create. The 'panel' and 'detached_panel' types create a popup unless the '--enable-panels' flag is set."
+              },
+              "state": {
+                "$ref": "WindowState",
+                "optional": true,
+                "description": "The initial state of the window. The 'minimized', 'maximized' and 'fullscreen' states cannot be combined with 'left', 'top', 'width' or 'height'."
+              },
+              "allowScriptsToClose": {
+                "type": "boolean",
+                "optional": true,
+                "description": "Allow scripts to close the window."
+              },
+              "titlePreface": {
+                "type": "string",
+                "optional": true,
+                "description": "A string to add to the beginning of the window title."
+              }
+            },
+            "optional": true
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "window",
+                "$ref": "Window",
+                "description": "Contains details about the created window.",
+                "optional": true
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "update",
+        "type": "function",
+        "description": "Updates the properties of a window. Specify only the properties that you want to change; unspecified properties will be left unchanged.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "integer",
+            "name": "windowId",
+            "minimum": -2
+          },
+          {
+            "type": "object",
+            "name": "updateInfo",
+            "properties": {
+              "left": {
+                "type": "integer",
+                "optional": true,
+                "description": "The offset from the left edge of the screen to move the window to in pixels. This value is ignored for panels."
+              },
+              "top": {
+                "type": "integer",
+                "optional": true,
+                "description": "The offset from the top edge of the screen to move the window to in pixels. This value is ignored for panels."
+              },
+              "width": {
+                "type": "integer",
+                "minimum": 0,
+                "optional": true,
+                "description": "The width to resize the window to in pixels. This value is ignored for panels."
+              },
+              "height": {
+                "type": "integer",
+                "minimum": 0,
+                "optional": true,
+                "description": "The height to resize the window to in pixels. This value is ignored for panels."
+              },
+              "focused": {
+                "type": "boolean",
+                "optional": true,
+                "description": "If true, brings the window to the front. If false, brings the next window in the z-order to the front."
+              },
+              "drawAttention": {
+                "type": "boolean",
+                "optional": true,
+                "description": "If true, causes the window to be displayed in a manner that draws the user's attention to the window, without changing the focused window. The effect lasts until the user changes focus to the window. This option has no effect if the window already has focus. Set to false to cancel a previous draw attention request."
+              },
+              "state": {
+                "$ref": "WindowState",
+                "optional": true,
+                "description": "The new state of the window. The 'minimized', 'maximized' and 'fullscreen' states cannot be combined with 'left', 'top', 'width' or 'height'."
+              },
+              "titlePreface": {
+                "type": "string",
+                "optional": true,
+                "description": "A string to add to the beginning of the window title."
+              }
+            }
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "window",
+                "$ref": "Window"
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "remove",
+        "type": "function",
+        "description": "Removes (closes) a window, and all the tabs inside it.",
+        "async": "callback",
+        "parameters": [
+          {
+            "type": "integer",
+            "name": "windowId",
+            "minimum": -2
+          },
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": []
+          }
+        ]
+      }
+    ],
+    "events": [
+      {
+        "name": "onCreated",
+        "type": "function",
+        "description": "Fired when a window is created.",
+        "filters": [
+          {
+            "name": "windowTypes",
+            "type": "array",
+            "items": { "$ref": "WindowType" },
+            "description": "Conditions that the window's type being created must satisfy. By default it will satisfy <code>['app', 'normal', 'panel', 'popup']</code>, with <code>'app'</code> and <code>'panel'</code> window types limited to the extension's own windows."
+          }
+        ],
+        "parameters": [
+          {
+            "$ref": "Window",
+            "name": "window",
+            "description": "Details of the window that was created."
+          }
+        ]
+      },
+      {
+        "name": "onRemoved",
+        "type": "function",
+        "description": "Fired when a window is removed (closed).",
+        "filters": [
+          {
+            "name": "windowTypes",
+            "type": "array",
+            "items": { "$ref": "WindowType" },
+            "description": "Conditions that the window's type being removed must satisfy. By default it will satisfy <code>['app', 'normal', 'panel', 'popup']</code>, with <code>'app'</code> and <code>'panel'</code> window types limited to the extension's own windows."
+          }
+        ],
+        "parameters": [
+          {
+            "type": "integer",
+            "name": "windowId",
+            "minimum": 0,
+            "description": "ID of the removed window."
+          }
+        ]
+      },
+      {
+        "name": "onFocusChanged",
+        "type": "function",
+        "description": "Fired when the currently focused window changes. Will be $(ref:windows.WINDOW_ID_NONE) if all browser windows have lost focus. Note: On some Linux window managers, WINDOW_ID_NONE will always be sent immediately preceding a switch from one browser window to another.",
+        "filters": [
+          {
+            "name": "windowTypes",
+            "type": "array",
+            "items": { "$ref": "WindowType" },
+            "description": "Conditions that the window's type being removed must satisfy. By default it will satisfy <code>['app', 'normal', 'panel', 'popup']</code>, with <code>'app'</code> and <code>'panel'</code> window types limited to the extension's own windows."
+          }
+        ],
+        "parameters": [
+          {
+            "type": "integer",
+            "name": "windowId",
+            "minimum": -1,
+            "description": "ID of the newly focused window."
+          }
+        ]
+      }
+    ]
+  }
+]