toolkit/devtools/content-observer.js@8bccb770b82d
toolkit/devtools/content-observer.js
Wed, 31 Dec 2014 13:27:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 13:27:57 +0100
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
- permissions
- -rw-r--r--
Ignore runtime configuration files generated during quality assurance.
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";
6 const {Cc, Ci, Cu, Cr} = require("chrome");
7 const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
9 const events = require("sdk/event/core");
10 const {Promise: promise} = Cu.import("resource://gre/modules/Promise.jsm", {});
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 }
24 module.exports.ContentObserver = ContentObserver;
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 },
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 },
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 },
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 };
65 // Utility functions.
67 ContentObserver.GetInnerWindowID = function(window) {
68 return window
69 .QueryInterface(Ci.nsIInterfaceRequestor)
70 .getInterface(Ci.nsIDOMWindowUtils)
71 .currentInnerWindowID;
72 };
