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Add Pale Moon
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NTD
Roy Tam
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dcd9973243
commit
fe8028fa2e
1173 changed files with 143053 additions and 934 deletions
278
application/palemoon/components/downloads/DownloadsStartup.js
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278
application/palemoon/components/downloads/DownloadsStartup.js
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* This component listens to notifications for startup, shutdown and session
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* restore, controlling which downloads should be loaded from the database.
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*
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* To avoid affecting startup performance, this component monitors the current
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* session restore state, but defers the actual downloads data manipulation
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* until the Download Manager service is loaded.
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*/
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"use strict";
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////////////////////////////////////////////////////////////////////////////////
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//// Globals
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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const Cr = Components.results;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "DownloadsCommon",
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"resource:///modules/DownloadsCommon.jsm");
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XPCOMUtils.defineLazyServiceGetter(this, "gSessionStartup",
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"@mozilla.org/browser/sessionstartup;1",
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"nsISessionStartup");
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const kObservedTopics = [
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"sessionstore-windows-restored",
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"sessionstore-browser-state-restored",
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"download-manager-initialized",
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"download-manager-change-retention",
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"last-pb-context-exited",
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"browser-lastwindow-close-granted",
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"quit-application",
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"profile-change-teardown",
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];
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/**
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* CID of our implementation of nsIDownloadManagerUI.
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*/
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const kDownloadsUICid = Components.ID("{4d99321e-d156-455b-81f7-e7aa2308134f}");
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/**
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* Contract ID of the service implementing nsIDownloadManagerUI.
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*/
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const kDownloadsUIContractId = "@mozilla.org/download-manager-ui;1";
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/**
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* CID of the JavaScript implementation of nsITransfer.
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*/
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const kTransferCid = Components.ID("{1b4c85df-cbdd-4bb6-b04e-613caece083c}");
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/**
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* Contract ID of the service implementing nsITransfer.
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*/
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const kTransferContractId = "@mozilla.org/transfer;1";
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////////////////////////////////////////////////////////////////////////////////
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//// DownloadsStartup
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function DownloadsStartup() { }
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DownloadsStartup.prototype = {
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classID: Components.ID("{49507fe5-2cee-4824-b6a3-e999150ce9b8}"),
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_xpcom_factory: XPCOMUtils.generateSingletonFactory(DownloadsStartup),
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//////////////////////////////////////////////////////////////////////////////
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//// nsISupports
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
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Ci.nsISupportsWeakReference]),
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//////////////////////////////////////////////////////////////////////////////
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//// nsIObserver
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observe: function DS_observe(aSubject, aTopic, aData)
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{
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switch (aTopic) {
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case "profile-after-change":
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// Override Toolkit's nsIDownloadManagerUI implementation with our own.
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// This must be done at application startup and not in the manifest to
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// ensure that our implementation overrides the original one.
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Components.manager.QueryInterface(Ci.nsIComponentRegistrar)
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.registerFactory(kDownloadsUICid, "",
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kDownloadsUIContractId, null);
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Components.manager.QueryInterface(Ci.nsIComponentRegistrar)
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.registerFactory(kTransferCid, "",
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kTransferContractId, null);
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break;
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case "sessionstore-windows-restored":
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case "sessionstore-browser-state-restored":
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// Unless there is no saved session, there is a chance that we are
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// starting up after a restart or a crash. We should check the disk
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// database to see if there are completed downloads to recover and show
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// in the panel, in addition to in-progress downloads.
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if (gSessionStartup.sessionType != Ci.nsISessionStartup.NO_SESSION) {
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this._restoringSession = true;
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}
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this._ensureDataLoaded();
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break;
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case "download-manager-initialized":
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// Don't initialize the JavaScript data and user interface layer if we
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// are initializing the Download Manager service during shutdown.
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if (this._shuttingDown) {
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break;
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}
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// Start receiving events for active and new downloads before we return
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// from this observer function. We can't defer the execution of this
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// step, to ensure that we don't lose events raised in the meantime.
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DownloadsCommon.initializeAllDataLinks(
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aSubject.QueryInterface(Ci.nsIDownloadManager));
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this._downloadsServiceInitialized = true;
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// Since this notification is generated during the getService call and
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// we need to get the Download Manager service ourselves, we must post
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// the handler on the event queue to be executed later.
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Services.tm.mainThread.dispatch(this._ensureDataLoaded.bind(this),
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Ci.nsIThread.DISPATCH_NORMAL);
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break;
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case "download-manager-change-retention":
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// If we're using the Downloads Panel, we override the retention
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// preference to always retain downloads on completion.
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if (!DownloadsCommon.useToolkitUI) {
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aSubject.QueryInterface(Ci.nsISupportsPRInt32).data = 2;
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}
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break;
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case "browser-lastwindow-close-granted":
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// When using the panel interface, downloads that are already completed
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// should be removed when the last full browser window is closed. This
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// event is invoked only if the application is not shutting down yet.
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// If the Download Manager service is not initialized, we don't want to
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// initialize it just to clean up completed downloads, because they can
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// be present only in case there was a browser crash or restart.
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if (this._downloadsServiceInitialized &&
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!DownloadsCommon.useToolkitUI) {
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Services.downloads.cleanUp();
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}
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break;
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case "last-pb-context-exited":
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// Similar to the above notification, but for private downloads.
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if (this._downloadsServiceInitialized &&
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!DownloadsCommon.useToolkitUI) {
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Services.downloads.cleanUpPrivate();
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}
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break;
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case "quit-application":
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// When the application is shutting down, we must free all resources in
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// addition to cleaning up completed downloads. If the Download Manager
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// service is not initialized, we don't want to initialize it just to
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// clean up completed downloads, because they can be present only in
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// case there was a browser crash or restart.
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this._shuttingDown = true;
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if (!this._downloadsServiceInitialized) {
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break;
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}
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DownloadsCommon.terminateAllDataLinks();
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// When using the panel interface, downloads that are already completed
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// should be removed when quitting the application.
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if (!DownloadsCommon.useToolkitUI && aData != "restart") {
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this._cleanupOnShutdown = true;
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}
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break;
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case "profile-change-teardown":
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// If we need to clean up, we must do it synchronously after all the
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// "quit-application" listeners are invoked, so that the Download
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// Manager service has a chance to pause or cancel in-progress downloads
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// before we remove completed downloads from the list. Note that, since
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// "quit-application" was invoked, we've already exited Private Browsing
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// Mode, thus we are always working on the disk database.
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if (this._cleanupOnShutdown) {
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Services.downloads.cleanUp();
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}
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if (!DownloadsCommon.useToolkitUI) {
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// If we got this far, that means that we finished our first session
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// with the Downloads Panel without crashing. This means that we don't
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// have to force displaying only active downloads on the next startup
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// now.
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this._firstSessionCompleted = true;
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}
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break;
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}
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},
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//////////////////////////////////////////////////////////////////////////////
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//// Private
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/**
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* Indicates whether we're restoring a previous session. This is used by
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* _recoverAllDownloads to determine whether or not we should load and
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* display all downloads data, or restrict it to only the active downloads.
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*/
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_restoringSession: false,
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/**
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* Indicates whether the Download Manager service has been initialized. This
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* flag is required because we want to avoid accessing the service immediately
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* at browser startup. The service will start when the user first requests a
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* download, or some time after browser startup.
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*/
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_downloadsServiceInitialized: false,
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/**
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* True while we are processing the "quit-application" event, and later.
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*/
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_shuttingDown: false,
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/**
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* True during shutdown if we need to remove completed downloads.
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*/
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_cleanupOnShutdown: false,
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/**
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* True if we should display all downloads, as opposed to just active
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* downloads. We decide to display all downloads if we're restoring a session,
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* or if we're using the Downloads Panel anytime after the first session with
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* it has completed.
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*/
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get _recoverAllDownloads() {
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return this._restoringSession ||
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(!DownloadsCommon.useToolkitUI && this._firstSessionCompleted);
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},
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/**
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* True if we've ever completed a session with the Downloads Panel enabled.
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*/
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get _firstSessionCompleted() {
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return Services.prefs
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.getBoolPref("browser.download.panel.firstSessionCompleted");
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},
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set _firstSessionCompleted(aValue) {
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Services.prefs.setBoolPref("browser.download.panel.firstSessionCompleted",
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aValue);
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return aValue;
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},
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/**
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* Ensures that persistent download data is reloaded at the appropriate time.
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*/
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_ensureDataLoaded: function DS_ensureDataLoaded()
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{
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if (!this._downloadsServiceInitialized) {
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return;
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}
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// If the previous session has been already restored, then we ensure that
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// all the downloads are loaded. Otherwise, we only ensure that the active
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// downloads from the previous session are loaded.
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DownloadsCommon.ensureAllPersistentDataLoaded(!this._recoverAllDownloads);
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}
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};
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////////////////////////////////////////////////////////////////////////////////
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//// Module
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory([DownloadsStartup]);
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