зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
4.4 KiB
JavaScript
132 строки
4.4 KiB
JavaScript
/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/FileUtils.jsm");
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const SYNC_PREFS_BRANCH = "services.sync.";
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/**
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* Sync's XPCOM service.
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*
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* It is named "Weave" for historical reasons.
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*
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* It's worth noting how Sync is lazily loaded. We register a timer that
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* loads Sync a few seconds after app startup. This is so Sync does not
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* adversely affect application start time.
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*
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* If Sync is not configured, no extra Sync code is loaded. If an
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* external component (say the UI) needs to interact with Sync, it
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* should do something like the following:
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*
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* // 1. Grab a handle to the Sync XPCOM service.
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* let service = Cc["@mozilla.org/weave/service;1"]
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* .getService(Components.interfaces.nsISupports)
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* .wrappedJSObject;
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*
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* // 2. Check if the service has been initialized.
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* if (service.ready) {
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* // You are free to interact with "Weave." objects.
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* return;
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* }
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*
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* // 3. Install "ready" listener.
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* Services.obs.addObserver(function onReady() {
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* Services.obs.removeObserver(onReady, "weave:service:ready");
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*
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* // You are free to interact with "Weave." objects.
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* }, "weave:service:ready", false);
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*
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* // 4. Trigger loading of Sync.
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* service.ensureLoaded();
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*/
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function WeaveService() {
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this.wrappedJSObject = this;
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this.ready = false;
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}
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WeaveService.prototype = {
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classID: Components.ID("{74b89fb0-f200-4ae8-a3ec-dd164117f6de}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
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Ci.nsISupportsWeakReference]),
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ensureLoaded: function () {
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Components.utils.import("resource://services-sync/main.js");
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// Side-effect of accessing the service is that it is instantiated.
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Weave.Service;
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},
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observe: function (subject, topic, data) {
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switch (topic) {
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case "app-startup":
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let os = Cc["@mozilla.org/observer-service;1"].
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getService(Ci.nsIObserverService);
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os.addObserver(this, "final-ui-startup", true);
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break;
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case "final-ui-startup":
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// Force Weave service to load if it hasn't triggered from overlays
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this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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this.timer.initWithCallback({
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notify: function() {
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// We only load more if it looks like Sync is configured.
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let prefs = Services.prefs.getBranch(SYNC_PREFS_BRANCH);
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if (!prefs.prefHasUserValue("username")) {
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return;
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}
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// We have a username. So, do a more thorough check. This will
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// import a number of modules and thus increase memory
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// accordingly. We could potentially copy code performed by
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// this check into this file if our above code is yielding too
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// many false positives.
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Components.utils.import("resource://services-sync/main.js");
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if (Weave.Status.checkSetup() != Weave.CLIENT_NOT_CONFIGURED) {
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this.ensureLoaded();
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}
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}.bind(this)
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}, 10000, Ci.nsITimer.TYPE_ONE_SHOT);
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break;
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}
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}
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};
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function AboutWeaveLog() {}
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AboutWeaveLog.prototype = {
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classID: Components.ID("{d28f8a0b-95da-48f4-b712-caf37097be41}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIAboutModule,
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Ci.nsISupportsWeakReference]),
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getURIFlags: function(aURI) {
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return 0;
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},
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newChannel: function(aURI) {
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let dir = FileUtils.getDir("ProfD", ["weave", "logs"], true);
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let uri = Services.io.newFileURI(dir);
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let channel = Services.io.newChannelFromURI(uri);
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channel.originalURI = aURI;
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// Ensure that the about page has the same privileges as a regular directory
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// view. That way links to files can be opened.
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let ssm = Cc["@mozilla.org/scriptsecuritymanager;1"]
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.getService(Ci.nsIScriptSecurityManager);
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let principal = ssm.getSimpleCodebasePrincipal(uri);
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channel.owner = principal;
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return channel;
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}
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};
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const components = [WeaveService, AboutWeaveLog];
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
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