michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80 filetype=javascript: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * This component enables the JavaScript API for downloads at startup.  This
michael@0:  * will eventually be removed when nsIDownloadManager will not be available
michael@0:  * anymore (bug 851471).
michael@0:  */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: //// Globals
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: const Cu = Components.utils;
michael@0: const Cr = Components.results;
michael@0: 
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: 
michael@0: /**
michael@0:  * CID and Contract ID of our implementation of nsIDownloadManagerUI.
michael@0:  */
michael@0: const kDownloadsUICid = Components.ID("{4d99321e-d156-455b-81f7-e7aa2308134f}");
michael@0: const kDownloadsUIContractId = "@mozilla.org/download-manager-ui;1";
michael@0: 
michael@0: /**
michael@0:  * CID and Contract ID of the JavaScript implementation of nsITransfer.
michael@0:  */
michael@0: const kTransferCid = Components.ID("{1b4c85df-cbdd-4bb6-b04e-613caece083c}");
michael@0: const kTransferContractId = "@mozilla.org/transfer;1";
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: //// DownloadsStartup
michael@0: 
michael@0: function DownloadsStartup() { }
michael@0: 
michael@0: DownloadsStartup.prototype = {
michael@0:   classID: Components.ID("{49507fe5-2cee-4824-b6a3-e999150ce9b8}"),
michael@0: 
michael@0:   _xpcom_factory: XPCOMUtils.generateSingletonFactory(DownloadsStartup),
michael@0: 
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsISupports
michael@0: 
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
michael@0: 
michael@0:   //////////////////////////////////////////////////////////////////////////////
michael@0:   //// nsIObserver
michael@0: 
michael@0:   observe: function DS_observe(aSubject, aTopic, aData)
michael@0:   {
michael@0:     if (aTopic != "profile-after-change") {
michael@0:       Cu.reportError("Unexpected observer notification.");
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     // Override Toolkit's nsIDownloadManagerUI implementation with our own.
michael@0:     // This must be done at application startup and not in the manifest to
michael@0:     // ensure that our implementation overrides the original one.
michael@0:     Components.manager.QueryInterface(Ci.nsIComponentRegistrar)
michael@0:                       .registerFactory(kDownloadsUICid, "",
michael@0:                                        kDownloadsUIContractId, null);
michael@0: 
michael@0:     // Override Toolkit's nsITransfer implementation with the one from the
michael@0:     // JavaScript API for downloads.
michael@0:     Components.manager.QueryInterface(Ci.nsIComponentRegistrar)
michael@0:                       .registerFactory(kTransferCid, "",
michael@0:                                        kTransferContractId, null);
michael@0:   },
michael@0: };
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: //// Module
michael@0: 
michael@0: this.NSGetFactory = XPCOMUtils.generateNSGetFactory([DownloadsStartup]);