The Tor Browser / file comparison
comparison: toolkit/devtools/content-observer.js
toolkit/devtools/content-observer.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f13f09025868 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 "use strict"; | |
| 5 | |
| 6 const {Cc, Ci, Cu, Cr} = require("chrome"); | |
| 7 const {Services} = Cu.import("resource://gre/modules/Services.jsm", {}); | |
| 8 | |
| 9 const events = require("sdk/event/core"); | |
| 10 const {Promise: promise} = Cu.import("resource://gre/modules/Promise.jsm", {}); | |
| 11 | |
| 12 /** | |
| 13 * Handles adding an observer for the creation of content document globals, | |
| 14 * event sent immediately after a web content document window has been set up, | |
| 15 * but before any script code has been executed. | |
| 16 */ | |
| 17 function ContentObserver(tabActor) { | |
| 18 this._contentWindow = tabActor.window; | |
| 19 this._onContentGlobalCreated = this._onContentGlobalCreated.bind(this); | |
| 20 this._onInnerWindowDestroyed = this._onInnerWindowDestroyed.bind(this); | |
| 21 this.startListening(); | |
| 22 } | |
| 23 | |
| 24 module.exports.ContentObserver = ContentObserver; | |
| 25 | |
| 26 ContentObserver.prototype = { | |
| 27 /** | |
| 28 * Starts listening for the required observer messages. | |
| 29 */ | |
| 30 startListening: function() { | |
| 31 Services.obs.addObserver( | |
| 32 this._onContentGlobalCreated, "content-document-global-created", false); | |
| 33 Services.obs.addObserver( | |
| 34 this._onInnerWindowDestroyed, "inner-window-destroyed", false); | |
| 35 }, | |
| 36 | |
| 37 /** | |
| 38 * Stops listening for the required observer messages. | |
| 39 */ | |
| 40 stopListening: function() { | |
| 41 Services.obs.removeObserver( | |
| 42 this._onContentGlobalCreated, "content-document-global-created", false); | |
| 43 Services.obs.removeObserver( | |
| 44 this._onInnerWindowDestroyed, "inner-window-destroyed", false); | |
| 45 }, | |
| 46 | |
| 47 /** | |
| 48 * Fired immediately after a web content document window has been set up. | |
| 49 */ | |
| 50 _onContentGlobalCreated: function(subject, topic, data) { | |
| 51 if (subject == this._contentWindow) { | |
| 52 events.emit(this, "global-created", subject); | |
| 53 } | |
| 54 }, | |
| 55 | |
| 56 /** | |
| 57 * Fired when an inner window is removed from the backward/forward cache. | |
| 58 */ | |
| 59 _onInnerWindowDestroyed: function(subject, topic, data) { | |
| 60 let id = subject.QueryInterface(Ci.nsISupportsPRUint64).data; | |
| 61 events.emit(this, "global-destroyed", id); | |
| 62 } | |
| 63 }; | |
| 64 | |
| 65 // Utility functions. | |
| 66 | |
| 67 ContentObserver.GetInnerWindowID = function(window) { | |
| 68 return window | |
| 69 .QueryInterface(Ci.nsIInterfaceRequestor) | |
| 70 .getInterface(Ci.nsIDOMWindowUtils) | |
| 71 .currentInnerWindowID; | |
| 72 }; |
