The Tor Browser / file comparison
comparison: dom/browser-element/BrowserElementParent.js
dom/browser-element/BrowserElementParent.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a2f0c07ce94f |
|---|---|
| 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 file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 "use strict"; | |
| 6 | |
| 7 const {utils: Cu, interfaces: Ci} = Components; | |
| 8 | |
| 9 Cu.import("resource://gre/modules/Services.jsm"); | |
| 10 Cu.import("resource://gre/modules/XPCOMUtils.jsm"); | |
| 11 | |
| 12 const NS_PREFBRANCH_PREFCHANGE_TOPIC_ID = "nsPref:changed"; | |
| 13 const BROWSER_FRAMES_ENABLED_PREF = "dom.mozBrowserFramesEnabled"; | |
| 14 | |
| 15 XPCOMUtils.defineLazyModuleGetter(this, "BrowserElementParentBuilder", | |
| 16 "resource://gre/modules/BrowserElementParent.jsm", | |
| 17 "BrowserElementParentBuilder"); | |
| 18 | |
| 19 function debug(msg) { | |
| 20 //dump("BrowserElementParent.js - " + msg + "\n"); | |
| 21 } | |
| 22 | |
| 23 /** | |
| 24 * BrowserElementParent implements one half of <iframe mozbrowser>. (The other | |
| 25 * half is, unsurprisingly, BrowserElementChild.) | |
| 26 * | |
| 27 * BrowserElementParentFactory detects when we create a windows or docshell | |
| 28 * contained inside a <iframe mozbrowser> and creates a BrowserElementParent | |
| 29 * object for that window. | |
| 30 * | |
| 31 * It creates a BrowserElementParent that injects script to listen for | |
| 32 * certain event. | |
| 33 */ | |
| 34 | |
| 35 function BrowserElementParentFactory() { | |
| 36 this._initialized = false; | |
| 37 } | |
| 38 | |
| 39 BrowserElementParentFactory.prototype = { | |
| 40 classID: Components.ID("{ddeafdac-cb39-47c4-9cb8-c9027ee36d26}"), | |
| 41 QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver, | |
| 42 Ci.nsISupportsWeakReference]), | |
| 43 | |
| 44 /** | |
| 45 * Called on app startup, and also when the browser frames enabled pref is | |
| 46 * changed. | |
| 47 */ | |
| 48 _init: function() { | |
| 49 if (this._initialized) { | |
| 50 return; | |
| 51 } | |
| 52 | |
| 53 // If the pref is disabled, do nothing except wait for the pref to change. | |
| 54 // (This is important for tests, if nothing else.) | |
| 55 if (!this._browserFramesPrefEnabled()) { | |
| 56 Services.prefs.addObserver(BROWSER_FRAMES_ENABLED_PREF, this, /* ownsWeak = */ true); | |
| 57 return; | |
| 58 } | |
| 59 | |
| 60 debug("_init"); | |
| 61 this._initialized = true; | |
| 62 | |
| 63 // Maps frame elements to BrowserElementParent objects. We never look up | |
| 64 // anything in this map; the purpose is to keep the BrowserElementParent | |
| 65 // alive for as long as its frame element lives. | |
| 66 this._bepMap = new WeakMap(); | |
| 67 | |
| 68 Services.obs.addObserver(this, 'remote-browser-pending', /* ownsWeak = */ true); | |
| 69 Services.obs.addObserver(this, 'inprocess-browser-shown', /* ownsWeak = */ true); | |
| 70 }, | |
| 71 | |
| 72 _browserFramesPrefEnabled: function() { | |
| 73 try { | |
| 74 return Services.prefs.getBoolPref(BROWSER_FRAMES_ENABLED_PREF); | |
| 75 } | |
| 76 catch(e) { | |
| 77 return false; | |
| 78 } | |
| 79 }, | |
| 80 | |
| 81 _observeInProcessBrowserFrameShown: function(frameLoader) { | |
| 82 // Ignore notifications that aren't from a BrowserOrApp | |
| 83 if (!frameLoader.QueryInterface(Ci.nsIFrameLoader).ownerIsBrowserOrAppFrame) { | |
| 84 return; | |
| 85 } | |
| 86 debug("In-process browser frame shown " + frameLoader); | |
| 87 this._createBrowserElementParent(frameLoader, | |
| 88 /* hasRemoteFrame = */ false, | |
| 89 /* pending frame */ false); | |
| 90 }, | |
| 91 | |
| 92 _observeRemoteBrowserFramePending: function(frameLoader) { | |
| 93 // Ignore notifications that aren't from a BrowserOrApp | |
| 94 if (!frameLoader.QueryInterface(Ci.nsIFrameLoader).ownerIsBrowserOrAppFrame) { | |
| 95 return; | |
| 96 } | |
| 97 debug("Remote browser frame shown " + frameLoader); | |
| 98 this._createBrowserElementParent(frameLoader, | |
| 99 /* hasRemoteFrame = */ true, | |
| 100 /* pending frame */ true); | |
| 101 }, | |
| 102 | |
| 103 _createBrowserElementParent: function(frameLoader, hasRemoteFrame, isPendingFrame) { | |
| 104 let frameElement = frameLoader.QueryInterface(Ci.nsIFrameLoader).ownerElement; | |
| 105 this._bepMap.set(frameElement, BrowserElementParentBuilder.create( | |
| 106 frameLoader, hasRemoteFrame, isPendingFrame)); | |
| 107 }, | |
| 108 | |
| 109 observe: function(subject, topic, data) { | |
| 110 switch(topic) { | |
| 111 case 'app-startup': | |
| 112 this._init(); | |
| 113 break; | |
| 114 case NS_PREFBRANCH_PREFCHANGE_TOPIC_ID: | |
| 115 if (data == BROWSER_FRAMES_ENABLED_PREF) { | |
| 116 this._init(); | |
| 117 } | |
| 118 break; | |
| 119 case 'remote-browser-pending': | |
| 120 this._observeRemoteBrowserFramePending(subject); | |
| 121 break; | |
| 122 case 'inprocess-browser-shown': | |
| 123 this._observeInProcessBrowserFrameShown(subject); | |
| 124 break; | |
| 125 } | |
| 126 }, | |
| 127 }; | |
| 128 | |
| 129 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([BrowserElementParentFactory]); |
