The Tor Browser / file comparison
comparison: browser/extensions/shumway/content/ShumwayUtils.jsm
browser/extensions/shumway/content/ShumwayUtils.jsm
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| 1 /* Copyright 2012 Mozilla Foundation | |
| 2 * | |
| 3 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 * you may not use this file except in compliance with the License. | |
| 5 * You may obtain a copy of the License at | |
| 6 * | |
| 7 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 * | |
| 9 * Unless required by applicable law or agreed to in writing, software | |
| 10 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 * See the License for the specific language governing permissions and | |
| 13 * limitations under the License. | |
| 14 */ | |
| 15 | |
| 16 var EXPORTED_SYMBOLS = ["ShumwayUtils"]; | |
| 17 | |
| 18 const RESOURCE_NAME = 'shumway'; | |
| 19 const EXT_PREFIX = 'shumway@research.mozilla.org'; | |
| 20 const SWF_CONTENT_TYPE = 'application/x-shockwave-flash'; | |
| 21 const PREF_PREFIX = 'shumway.'; | |
| 22 const PREF_DISABLED = PREF_PREFIX + 'disabled'; | |
| 23 const PREF_IGNORE_CTP = PREF_PREFIX + 'ignoreCTP'; | |
| 24 | |
| 25 let Cc = Components.classes; | |
| 26 let Ci = Components.interfaces; | |
| 27 let Cm = Components.manager; | |
| 28 let Cu = Components.utils; | |
| 29 | |
| 30 Cu.import('resource://gre/modules/XPCOMUtils.jsm'); | |
| 31 Cu.import('resource://gre/modules/Services.jsm'); | |
| 32 Cu.import('resource://shumway/ShumwayStreamConverter.jsm'); | |
| 33 | |
| 34 let Svc = {}; | |
| 35 XPCOMUtils.defineLazyServiceGetter(Svc, 'mime', | |
| 36 '@mozilla.org/mime;1', | |
| 37 'nsIMIMEService'); | |
| 38 XPCOMUtils.defineLazyServiceGetter(Svc, 'pluginHost', | |
| 39 '@mozilla.org/plugin/host;1', | |
| 40 'nsIPluginHost'); | |
| 41 | |
| 42 function getBoolPref(pref, def) { | |
| 43 try { | |
| 44 return Services.prefs.getBoolPref(pref); | |
| 45 } catch (ex) { | |
| 46 return def; | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 function log(str) { | |
| 51 dump(str + '\n'); | |
| 52 } | |
| 53 | |
| 54 // Register/unregister a constructor as a factory. | |
| 55 function Factory() {} | |
| 56 Factory.prototype = { | |
| 57 register: function register(targetConstructor) { | |
| 58 var proto = targetConstructor.prototype; | |
| 59 this._classID = proto.classID; | |
| 60 | |
| 61 var factory = XPCOMUtils._getFactory(targetConstructor); | |
| 62 this._factory = factory; | |
| 63 | |
| 64 var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar); | |
| 65 registrar.registerFactory(proto.classID, proto.classDescription, | |
| 66 proto.contractID, factory); | |
| 67 }, | |
| 68 | |
| 69 unregister: function unregister() { | |
| 70 var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar); | |
| 71 registrar.unregisterFactory(this._classID, this._factory); | |
| 72 this._factory = null; | |
| 73 } | |
| 74 }; | |
| 75 | |
| 76 let converterFactory = new Factory(); | |
| 77 let overlayConverterFactory = new Factory(); | |
| 78 | |
| 79 let ShumwayUtils = { | |
| 80 QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]), | |
| 81 _registered: false, | |
| 82 | |
| 83 init: function init() { | |
| 84 if (this.enabled) | |
| 85 this._ensureRegistered(); | |
| 86 else | |
| 87 this._ensureUnregistered(); | |
| 88 | |
| 89 // Listen for when shumway is completely disabled. | |
| 90 Services.prefs.addObserver(PREF_DISABLED, this, false); | |
| 91 }, | |
| 92 | |
| 93 // nsIObserver | |
| 94 observe: function observe(aSubject, aTopic, aData) { | |
| 95 if (this.enabled) | |
| 96 this._ensureRegistered(); | |
| 97 else | |
| 98 this._ensureUnregistered(); | |
| 99 }, | |
| 100 | |
| 101 /** | |
| 102 * shumway is only enabled if the global switch enabling is true. | |
| 103 * @return {boolean} Wether or not it's enabled. | |
| 104 */ | |
| 105 get enabled() { | |
| 106 return !getBoolPref(PREF_DISABLED, true); | |
| 107 }, | |
| 108 | |
| 109 _ensureRegistered: function _ensureRegistered() { | |
| 110 if (this._registered) | |
| 111 return; | |
| 112 | |
| 113 // Load the component and register it. | |
| 114 converterFactory.register(ShumwayStreamConverter); | |
| 115 overlayConverterFactory.register(ShumwayStreamOverlayConverter); | |
| 116 | |
| 117 var ignoreCTP = getBoolPref(PREF_IGNORE_CTP, true); | |
| 118 | |
| 119 Svc.pluginHost.registerPlayPreviewMimeType(SWF_CONTENT_TYPE, ignoreCTP); | |
| 120 | |
| 121 this._registered = true; | |
| 122 | |
| 123 log('Shumway is registered'); | |
| 124 }, | |
| 125 | |
| 126 _ensureUnregistered: function _ensureUnregistered() { | |
| 127 if (!this._registered) | |
| 128 return; | |
| 129 | |
| 130 // Remove the contract/component. | |
| 131 converterFactory.unregister(); | |
| 132 overlayConverterFactory.unregister(); | |
| 133 | |
| 134 Svc.pluginHost.unregisterPlayPreviewMimeType(SWF_CONTENT_TYPE); | |
| 135 | |
| 136 this._registered = false; | |
| 137 | |
| 138 log('Shumway is unregistered'); | |
| 139 } | |
| 140 }; |
