gecko/mobile/android/components/WebappsUpdateTimer.js

66 lines
2.3 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/. */
/**
* This component triggers a periodic webapp update check.
*/
"use strict";
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/WebappManager.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
function log(message) {
// We use *dump* instead of Services.console.logStringMessage so the messages
// have the INFO level of severity instead of the ERROR level. And we don't
// append a newline character to the end of the message because *dump* spills
// into the Android native logging system, which strips newlines from messages
// and breaks messages into lines automatically at display time (i.e. logcat).
dump(message);
}
function WebappsUpdateTimer() {}
WebappsUpdateTimer.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsITimerCallback,
Ci.nsISupportsWeakReference]),
classID: Components.ID("{8f7002cb-e959-4f0a-a2e8-563232564385}"),
notify: function(aTimer) {
if (Services.prefs.getIntPref("browser.webapps.checkForUpdates") == 0) {
// Do nothing, because updates are disabled.
log("Webapps update timer invoked in webapp process; ignoring.");
return;
}
// If we are offline, wait to be online to start the update check.
if (Services.io.offline) {
log("network offline for webapp update check; waiting");
Services.obs.addObserver(this, "network:offline-status-changed", true);
return;
}
log("periodic check for webapp updates");
WebappManager.checkForUpdates();
},
observe: function(aSubject, aTopic, aData) {
if (aTopic !== "network:offline-status-changed" || aData !== "online") {
return;
}
log("network back online for webapp update check; commencing");
// TODO: observe pref to do this only on wifi.
Services.obs.removeObserver(this, "network:offline-status-changed");
WebappManager.checkForUpdates();
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebappsUpdateTimer]);