The Tor Browser: toolkit/mozapps/extensions/amInstallTrigger.js@6474c204b198 (annotated)

toolkit/mozapps/extensions/amInstallTrigger.js@6474c204b198 (annotated)

toolkit/mozapps/extensions/amInstallTrigger.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/Preferences.jsm");
 Cu.import("resource://gre/modules/Log.jsm");
 const XPINSTALL_MIMETYPE   = "application/x-xpinstall";
 const MSG_INSTALL_ENABLED  = "WebInstallerIsInstallEnabled";
 const MSG_INSTALL_ADDONS   = "WebInstallerInstallAddonsFromWebpage";
 const MSG_INSTALL_CALLBACK = "WebInstallerInstallCallback";
 let log = Log.repository.getLogger("AddonManager.InstallTrigger");
 log.level = Log.Level[Preferences.get("extensions.logging.enabled", false) ? "Warn" : "Trace"];
 function CallbackObject(id, callback, urls, mediator) {
   this.id = id;
   this.callback = callback;
   this.urls = new Set(urls);
   this.callCallback = function(url, status) {
     try {
       this.callback(url, status);
     }
     catch (e) {
       log.warn("InstallTrigger callback threw an exception: " + e);
     }
     this.urls.delete(url);
     if (this.urls.size == 0)
       mediator._callbacks.delete(id);
   };
 }
 function RemoteMediator(windowID) {
   this._windowID = windowID;
   this._lastCallbackID = 0;
   this._callbacks = new Map();
   this.mm = Cc["@mozilla.org/childprocessmessagemanager;1"]
             .getService(Ci.nsISyncMessageSender);
   this.mm.addWeakMessageListener(MSG_INSTALL_CALLBACK, this);
 }
 RemoteMediator.prototype = {
   receiveMessage: function(message) {
     if (message.name == MSG_INSTALL_CALLBACK) {
       let payload = message.data;
       let callbackHandler = this._callbacks.get(payload.callbackID);
       if (callbackHandler) {
         callbackHandler.callCallback(payload.url, payload.status);
       }
     }
   },
   enabled: function(url) {
     let params = {
       referer: url,
       mimetype: XPINSTALL_MIMETYPE
     };
     return this.mm.sendSyncMessage(MSG_INSTALL_ENABLED, params)[0];
   },
   install: function(installs, referer, callback, window) {
     let callbackID = this._addCallback(callback, installs.uris);
     installs.mimetype = XPINSTALL_MIMETYPE;
     installs.referer = referer;
     installs.callbackID = callbackID;
     return this.mm.sendSyncMessage(MSG_INSTALL_ADDONS, installs, {win: window})[0];
   },
   _addCallback: function(callback, urls) {
     if (!callback || typeof callback != "function")
       return -1;
     let callbackID = this._windowID + "-" + ++this._lastCallbackID;
     let callbackObject = new CallbackObject(callbackID, callback, urls, this);
     this._callbacks.set(callbackID, callbackObject);
     return callbackID;
   },
   QueryInterface: XPCOMUtils.generateQI([Ci.nsISupportsWeakReference])
 };
 function InstallTrigger() {
 }
 InstallTrigger.prototype = {
   // Here be magic. We've declared ourselves as providing the
   // nsIDOMGlobalPropertyInitializer interface, and are registered in the
   // "JavaScript-global-property" category in the XPCOM category manager. This
   // means that for newly created windows, XPCOM will createinstance this
   // object, and then call init, passing in the window for which we need to
   // provide an instance. We then initialize ourselves and return the webidl
   // version of this object using the webidl-provided _create method, which
   // XPCOM will then duly expose as a property value on the window. All this
   // indirection is necessary because webidl does not (yet) support statics
   // (bug 863952). See bug 926712 for more details about this implementation.
   init: function(window) {
     this._window = window;
     this._principal = window.document.nodePrincipal;
     this._url = window.document.documentURIObject;
     window.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
     let utils = window.getInterface(Components.interfaces.nsIDOMWindowUtils);
     this._mediator = new RemoteMediator(utils.currentInnerWindowID);
     return window.InstallTriggerImpl._create(window, this);
   },
   enabled: function() {
     return this._mediator.enabled(this._url.spec);
   },
   updateEnabled: function() {
     return this.enabled();
   },
   install: function(installs, callback) {
     let installData = {
       uris: [],
       hashes: [],
       names: [],
       icons: [],
     };
     for (let name of Object.keys(installs)) {
       let item = installs[name];
       if (typeof item === "string") {
         item = { URL: item };
       }
       if (!item.URL) {
         throw new this._window.DOMError("Error", "Missing URL property for '" + name + "'");
       }
       let url = this._resolveURL(item.URL);
       if (!this._checkLoadURIFromScript(url)) {
         throw new this._window.DOMError("SecurityError", "Insufficient permissions to install: " + url.spec);
       }
       let iconUrl = null;
       if (item.IconURL) {
         iconUrl = this._resolveURL(item.IconURL);
         if (!this._checkLoadURIFromScript(iconUrl)) {
           iconUrl = null; // If page can't load the icon, just ignore it
         }
       }
       installData.uris.push(url.spec);
       installData.hashes.push(item.Hash || null);
       installData.names.push(name);
       installData.icons.push(iconUrl ? iconUrl.spec : null);
     }
     return this._mediator.install(installData, this._url.spec, callback, this._window);
   },
   startSoftwareUpdate: function(url, flags) {
     let filename = Services.io.newURI(url, null, null)
                               .QueryInterface(Ci.nsIURL)
                               .filename;
     let args = {};
     args[filename] = { "URL": url };
     return this.install(args);
   },
   installChrome: function(type, url, skin) {
     return this.startSoftwareUpdate(url);
   },
   _resolveURL: function (url) {
     return Services.io.newURI(url, null, this._url);
   },
   _checkLoadURIFromScript: function(uri) {
     let secman = Services.scriptSecurityManager;
     try {
       secman.checkLoadURIWithPrincipal(this._principal,
                                        uri,
                                        secman.DISALLOW_INHERIT_PRINCIPAL);
       return true;
     }
     catch(e) {
       return false;
     }
   },
   classID: Components.ID("{9df8ef2b-94da-45c9-ab9f-132eb55fddf1}"),
   contractID: "@mozilla.org/addons/installtrigger;1",
   QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports, Ci.nsIDOMGlobalPropertyInitializer])
 };
 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([InstallTrigger]);