gecko-dev/addon-sdk/source/modules/system/Startup.js

56 строки
1.8 KiB
JavaScript

/* 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";
var EXPORTED_SYMBOLS = ["Startup"];
const { utils: Cu, interfaces: Ci, classes: Cc } = Components;
const { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
const { XulApp } = Cu.import("resource://gre/modules/sdk/system/XulApp.js", {});
const { defer } = Cu.import("resource://gre/modules/Promise.jsm", {}).Promise;
const appStartupSrv = Cc["@mozilla.org/toolkit/app-startup;1"]
.getService(Ci.nsIAppStartup);
const NAME2TOPIC = {
'Firefox': 'sessionstore-windows-restored',
'Fennec': 'sessionstore-windows-restored',
'SeaMonkey': 'sessionstore-windows-restored',
'Thunderbird': 'mail-startup-done'
};
var Startup = {
initialized: !appStartupSrv.startingUp
};
var exports = Startup;
let gOnceInitializedDeferred = defer();
exports.onceInitialized = gOnceInitializedDeferred.promise;
// Set 'final-ui-startup' as default topic for unknown applications
let appStartup = 'final-ui-startup';
if (Startup.initialized) {
gOnceInitializedDeferred.resolve()
}
else {
// Gets the topic that fit best as application startup event, in according with
// the current application (e.g. Firefox, Fennec, Thunderbird...)
for (let name of Object.keys(NAME2TOPIC)) {
if (XulApp.is(name)) {
appStartup = NAME2TOPIC[name];
break;
}
}
let listener = function (subject, topic) {
Services.obs.removeObserver(this, topic);
Startup.initialized = true;
Services.tm.currentThread.dispatch(() => gOnceInitializedDeferred.resolve(),
Ci.nsIThread.DISPATCH_NORMAL);
}
Services.obs.addObserver(listener, appStartup, false);
}