The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/browser/extensions/shumway/content/ShumwayUtils.jsm	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,140 @@
     1.4 +/* Copyright 2012 Mozilla Foundation
     1.5 + *
     1.6 + * Licensed under the Apache License, Version 2.0 (the "License");
     1.7 + * you may not use this file except in compliance with the License.
     1.8 + * You may obtain a copy of the License at
     1.9 + *
    1.10 + *     http://www.apache.org/licenses/LICENSE-2.0
    1.11 + *
    1.12 + * Unless required by applicable law or agreed to in writing, software
    1.13 + * distributed under the License is distributed on an "AS IS" BASIS,
    1.14 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    1.15 + * See the License for the specific language governing permissions and
    1.16 + * limitations under the License.
    1.17 + */
    1.18 +
    1.19 +var EXPORTED_SYMBOLS = ["ShumwayUtils"];
    1.20 +
    1.21 +const RESOURCE_NAME = 'shumway';
    1.22 +const EXT_PREFIX = 'shumway@research.mozilla.org';
    1.23 +const SWF_CONTENT_TYPE = 'application/x-shockwave-flash';
    1.24 +const PREF_PREFIX = 'shumway.';
    1.25 +const PREF_DISABLED = PREF_PREFIX + 'disabled';
    1.26 +const PREF_IGNORE_CTP = PREF_PREFIX + 'ignoreCTP';
    1.27 +
    1.28 +let Cc = Components.classes;
    1.29 +let Ci = Components.interfaces;
    1.30 +let Cm = Components.manager;
    1.31 +let Cu = Components.utils;
    1.32 +
    1.33 +Cu.import('resource://gre/modules/XPCOMUtils.jsm');
    1.34 +Cu.import('resource://gre/modules/Services.jsm');
    1.35 +Cu.import('resource://shumway/ShumwayStreamConverter.jsm');
    1.36 +
    1.37 +let Svc = {};
    1.38 +XPCOMUtils.defineLazyServiceGetter(Svc, 'mime',
    1.39 +                                   '@mozilla.org/mime;1',
    1.40 +                                   'nsIMIMEService');
    1.41 +XPCOMUtils.defineLazyServiceGetter(Svc, 'pluginHost',
    1.42 +                                   '@mozilla.org/plugin/host;1',
    1.43 +                                   'nsIPluginHost');
    1.44 +
    1.45 +function getBoolPref(pref, def) {
    1.46 +  try {
    1.47 +    return Services.prefs.getBoolPref(pref);
    1.48 +  } catch (ex) {
    1.49 +    return def;
    1.50 +  }
    1.51 +}
    1.52 +
    1.53 +function log(str) {
    1.54 +  dump(str + '\n');
    1.55 +}
    1.56 +
    1.57 +// Register/unregister a constructor as a factory.
    1.58 +function Factory() {}
    1.59 +Factory.prototype = {
    1.60 +  register: function register(targetConstructor) {
    1.61 +    var proto = targetConstructor.prototype;
    1.62 +    this._classID = proto.classID;
    1.63 +
    1.64 +    var factory = XPCOMUtils._getFactory(targetConstructor);
    1.65 +    this._factory = factory;
    1.66 +
    1.67 +    var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
    1.68 +    registrar.registerFactory(proto.classID, proto.classDescription,
    1.69 +                              proto.contractID, factory);
    1.70 +  },
    1.71 +
    1.72 +  unregister: function unregister() {
    1.73 +    var registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
    1.74 +    registrar.unregisterFactory(this._classID, this._factory);
    1.75 +    this._factory = null;
    1.76 +  }
    1.77 +};
    1.78 +
    1.79 +let converterFactory = new Factory();
    1.80 +let overlayConverterFactory = new Factory();
    1.81 +
    1.82 +let ShumwayUtils = {
    1.83 +  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
    1.84 +  _registered: false,
    1.85 +
    1.86 +  init: function init() {
    1.87 +    if (this.enabled)
    1.88 +      this._ensureRegistered();
    1.89 +    else
    1.90 +      this._ensureUnregistered();
    1.91 +
    1.92 +    // Listen for when shumway is completely disabled.
    1.93 +    Services.prefs.addObserver(PREF_DISABLED, this, false);
    1.94 +  },
    1.95 +
    1.96 +  // nsIObserver
    1.97 +  observe: function observe(aSubject, aTopic, aData) {
    1.98 +    if (this.enabled)
    1.99 +      this._ensureRegistered();
   1.100 +    else
   1.101 +      this._ensureUnregistered();
   1.102 +  },
   1.103 +  
   1.104 +  /**
   1.105 +   * shumway is only enabled if the global switch enabling is true.
   1.106 +   * @return {boolean} Wether or not it's enabled.
   1.107 +   */
   1.108 +  get enabled() {
   1.109 +    return !getBoolPref(PREF_DISABLED, true);
   1.110 +  },
   1.111 +
   1.112 +  _ensureRegistered: function _ensureRegistered() {
   1.113 +    if (this._registered)
   1.114 +      return;
   1.115 +
   1.116 +    // Load the component and register it.
   1.117 +    converterFactory.register(ShumwayStreamConverter);
   1.118 +    overlayConverterFactory.register(ShumwayStreamOverlayConverter);
   1.119 +
   1.120 +    var ignoreCTP = getBoolPref(PREF_IGNORE_CTP, true);
   1.121 +
   1.122 +    Svc.pluginHost.registerPlayPreviewMimeType(SWF_CONTENT_TYPE, ignoreCTP);
   1.123 +
   1.124 +    this._registered = true;
   1.125 +
   1.126 +    log('Shumway is registered');
   1.127 +  },
   1.128 +
   1.129 +  _ensureUnregistered: function _ensureUnregistered() {
   1.130 +    if (!this._registered)
   1.131 +      return;
   1.132 +
   1.133 +    // Remove the contract/component.
   1.134 +    converterFactory.unregister();
   1.135 +    overlayConverterFactory.unregister();
   1.136 +
   1.137 +    Svc.pluginHost.unregisterPlayPreviewMimeType(SWF_CONTENT_TYPE);
   1.138 +
   1.139 +    this._registered = false;
   1.140 +
   1.141 +    log('Shumway is unregistered');
   1.142 +  }
   1.143 +};