mirror of
https://github.com/classilla/tenfourfox.git
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625 lines
20 KiB
JavaScript
625 lines
20 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/* static functions */
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const DEBUG = true;
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function debug(aStr) {
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DEBUG && dump("AlarmService: " + aStr + "\n");
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}
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const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
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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/AlarmDB.jsm");
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this.EXPORTED_SYMBOLS = ["AlarmService"];
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XPCOMUtils.defineLazyGetter(this, "appsService", function() {
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return Cc["@mozilla.org/AppsService;1"].getService(Ci.nsIAppsService);
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});
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XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
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"@mozilla.org/parentprocessmessagemanager;1",
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"nsIMessageListenerManager");
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XPCOMUtils.defineLazyGetter(this, "messenger", function() {
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return Cc["@mozilla.org/system-message-internal;1"]
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.getService(Ci.nsISystemMessagesInternal);
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});
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XPCOMUtils.defineLazyGetter(this, "powerManagerService", function() {
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return Cc["@mozilla.org/power/powermanagerservice;1"]
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.getService(Ci.nsIPowerManagerService);
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});
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/**
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* AlarmService provides an API to schedule alarms using the device's RTC.
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*
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* AlarmService is primarily used by the mozAlarms API (navigator.mozAlarms)
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* which uses IPC to communicate with the service.
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*
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* AlarmService can also be used by Gecko code by importing the module and then
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* using AlarmService.add() and AlarmService.remove(). Only Gecko code running
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* in the parent process should do this.
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*/
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this.AlarmService = {
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lastChromeId: 0,
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init: function init() {
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debug("init()");
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Services.obs.addObserver(this, "profile-change-teardown", false);
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Services.obs.addObserver(this, "webapps-clear-data",false);
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this._currentTimezoneOffset = (new Date()).getTimezoneOffset();
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let alarmHalService = this._alarmHalService =
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Cc["@mozilla.org/alarmHalService;1"].getService(Ci.nsIAlarmHalService);
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alarmHalService.setAlarmFiredCb(this._onAlarmFired.bind(this));
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alarmHalService.setTimezoneChangedCb(this._onTimezoneChanged.bind(this));
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alarmHalService.setSystemClockChangedCb(
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this._onSystemClockChanged.bind(this));
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// Add the messages to be listened to.
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this._messages = ["AlarmsManager:GetAll",
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"AlarmsManager:Add",
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"AlarmsManager:Remove"];
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this._messages.forEach(function addMessage(msgName) {
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ppmm.addMessageListener(msgName, this);
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}.bind(this));
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// Set the indexeddb database.
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this._db = new AlarmDB();
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this._db.init();
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// Variable to save alarms waiting to be set.
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this._alarmQueue = [];
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this._restoreAlarmsFromDb();
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},
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// Getter/setter to access the current alarm set in system.
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_alarm: null,
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get _currentAlarm() {
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return this._alarm;
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},
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set _currentAlarm(aAlarm) {
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this._alarm = aAlarm;
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if (!aAlarm) {
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return;
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}
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let alarmTimeInMs = this._getAlarmTime(aAlarm);
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let ns = (alarmTimeInMs % 1000) * 1000000;
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if (!this._alarmHalService.setAlarm(alarmTimeInMs / 1000, ns)) {
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throw Components.results.NS_ERROR_FAILURE;
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}
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},
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receiveMessage: function receiveMessage(aMessage) {
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debug("receiveMessage(): " + aMessage.name);
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let json = aMessage.json;
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// To prevent the hacked child process from sending commands to parent
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// to schedule alarms, we need to check its permission and manifest URL.
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if (this._messages.indexOf(aMessage.name) != -1) {
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if (!aMessage.target.assertPermission("alarms")) {
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debug("Got message from a child process with no 'alarms' permission.");
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return null;
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}
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if (!aMessage.target.assertContainApp(json.manifestURL)) {
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debug("Got message from a child process containing illegal manifest URL.");
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return null;
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}
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}
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let mm = aMessage.target.QueryInterface(Ci.nsIMessageSender);
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switch (aMessage.name) {
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case "AlarmsManager:GetAll":
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this._db.getAll(json.manifestURL,
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function getAllSuccessCb(aAlarms) {
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debug("Callback after getting alarms from database: " +
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JSON.stringify(aAlarms));
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this._sendAsyncMessage(mm, "GetAll", true, json.requestId, aAlarms);
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}.bind(this),
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function getAllErrorCb(aErrorMsg) {
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this._sendAsyncMessage(mm, "GetAll", false, json.requestId, aErrorMsg);
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}.bind(this));
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break;
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case "AlarmsManager:Add":
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// Prepare a record for the new alarm to be added.
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let newAlarm = { date: json.date,
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ignoreTimezone: json.ignoreTimezone,
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data: json.data,
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pageURL: json.pageURL,
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manifestURL: json.manifestURL };
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this.add(newAlarm, null,
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// Receives the alarm ID as the last argument.
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this._sendAsyncMessage.bind(this, mm, "Add", true, json.requestId),
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// Receives the error message as the last argument.
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this._sendAsyncMessage.bind(this, mm, "Add", false, json.requestId));
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break;
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case "AlarmsManager:Remove":
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this.remove(json.id, json.manifestURL);
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break;
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default:
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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break;
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}
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},
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_sendAsyncMessage: function _sendAsyncMessage(aMessageManager, aMessageName,
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aSuccess, aRequestId, aData) {
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debug("_sendAsyncMessage()");
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if (!aMessageManager) {
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debug("Invalid message manager: null");
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throw Components.results.NS_ERROR_FAILURE;
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}
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let json = null;
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switch (aMessageName) {
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case "Add":
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json = aSuccess ?
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{ requestId: aRequestId, id: aData } :
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{ requestId: aRequestId, errorMsg: aData };
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break;
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case "GetAll":
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json = aSuccess ?
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{ requestId: aRequestId, alarms: aData } :
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{ requestId: aRequestId, errorMsg: aData };
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break;
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default:
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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break;
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}
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aMessageManager.sendAsyncMessage("AlarmsManager:" + aMessageName +
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":Return:" + (aSuccess ? "OK" : "KO"),
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json);
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},
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_removeAlarmFromDb: function _removeAlarmFromDb(aId, aManifestURL,
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aRemoveSuccessCb) {
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debug("_removeAlarmFromDb()");
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// If the aRemoveSuccessCb is undefined or null, set a dummy callback for
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// it which is needed for _db.remove().
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if (!aRemoveSuccessCb) {
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aRemoveSuccessCb = function removeSuccessCb() {
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debug("Remove alarm from DB successfully.");
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};
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}
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// Is this a chrome alarm?
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if (aId < 0) {
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aRemoveSuccessCb();
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return;
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}
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this._db.remove(aId, aManifestURL, aRemoveSuccessCb,
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function removeErrorCb(aErrorMsg) {
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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});
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},
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/**
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* Create a copy of the alarm that does not expose internal fields to
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* receivers and sticks to the public |respectTimezone| API rather than the
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* boolean |ignoreTimezone| field.
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*/
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_publicAlarm: function _publicAlarm(aAlarm) {
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let alarm = { "id": aAlarm.id,
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"date": aAlarm.date,
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"respectTimezone": aAlarm.ignoreTimezone ?
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"ignoreTimezone" : "honorTimezone",
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"data": aAlarm.data };
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return alarm;
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},
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_fireSystemMessage: function _fireSystemMessage(aAlarm) {
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debug("Fire system message: " + JSON.stringify(aAlarm));
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let manifestURI = Services.io.newURI(aAlarm.manifestURL, null, null);
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let pageURI = Services.io.newURI(aAlarm.pageURL, null, null);
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messenger.sendMessage("alarm",
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this._publicAlarm(aAlarm),
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pageURI,
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manifestURI);
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},
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_notifyAlarmObserver: function _notifyAlarmObserver(aAlarm) {
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debug("_notifyAlarmObserver()");
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let wakeLock = powerManagerService.newWakeLock("cpu");
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let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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timer.initWithCallback(() => {
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debug("_notifyAlarmObserver - timeout()");
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if (aAlarm.manifestURL) {
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this._fireSystemMessage(aAlarm);
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} else if (typeof aAlarm.alarmFiredCb === "function") {
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aAlarm.alarmFiredCb(this._publicAlarm(aAlarm));
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}
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wakeLock.unlock();
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}, 0, Ci.nsITimer.TYPE_ONE_SHOT);
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},
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_onAlarmFired: function _onAlarmFired() {
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debug("_onAlarmFired()");
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if (this._currentAlarm) {
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let currentAlarmTime = this._getAlarmTime(this._currentAlarm);
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// If a alarm fired before the actual time that the current
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// alarm should occur, we reset this current alarm.
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if (currentAlarmTime > Date.now()) {
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let currentAlarm = this._currentAlarm;
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this._currentAlarm = currentAlarm;
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this._debugCurrentAlarm();
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return;
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}
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this._removeAlarmFromDb(this._currentAlarm.id, null);
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// We need to clear the current alarm before notifying because chrome
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// alarms may add a new alarm during their callback, and we do not want
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// to clobber it.
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let firingAlarm = this._currentAlarm;
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this._currentAlarm = null;
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this._notifyAlarmObserver(firingAlarm);
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}
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// Reset the next alarm from the queue.
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let alarmQueue = this._alarmQueue;
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while (alarmQueue.length > 0) {
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let nextAlarm = alarmQueue.shift();
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let nextAlarmTime = this._getAlarmTime(nextAlarm);
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// If the next alarm has been expired, directly notify the observer.
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// it instead of setting it.
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if (nextAlarmTime <= Date.now()) {
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this._removeAlarmFromDb(nextAlarm.id, null);
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this._notifyAlarmObserver(nextAlarm);
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} else {
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this._currentAlarm = nextAlarm;
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break;
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}
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}
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this._debugCurrentAlarm();
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},
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_onTimezoneChanged: function _onTimezoneChanged(aTimezoneOffset) {
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debug("_onTimezoneChanged()");
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this._currentTimezoneOffset = aTimezoneOffset;
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this._restoreAlarmsFromDb();
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},
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_onSystemClockChanged: function _onSystemClockChanged(aClockDeltaMS) {
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debug("_onSystemClockChanged");
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this._restoreAlarmsFromDb();
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},
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_restoreAlarmsFromDb: function _restoreAlarmsFromDb() {
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debug("_restoreAlarmsFromDb()");
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this._db.getAll(null,
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function getAllSuccessCb(aAlarms) {
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debug("Callback after getting alarms from database: " +
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JSON.stringify(aAlarms));
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// Clear any alarms set or queued in the cache if coming from db.
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let alarmQueue = this._alarmQueue;
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if (this._currentAlarm) {
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alarmQueue.unshift(this._currentAlarm);
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this._currentAlarm = null;
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}
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for (let i = 0; i < alarmQueue.length;) {
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if (alarmQueue[i]['id'] < 0) {
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++i;
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continue;
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}
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alarmQueue.splice(i, 1);
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}
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// Only restore the alarm that's not yet expired; otherwise, remove it
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// from the database and notify the observer.
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aAlarms.forEach(function addAlarm(aAlarm) {
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if ("manifestURL" in aAlarm && aAlarm.manifestURL &&
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this._getAlarmTime(aAlarm) > Date.now()) {
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alarmQueue.push(aAlarm);
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} else {
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this._removeAlarmFromDb(aAlarm.id, null);
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this._notifyAlarmObserver(aAlarm);
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}
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}.bind(this));
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// Set the next alarm from the queue.
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if (alarmQueue.length) {
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alarmQueue.sort(this._sortAlarmByTimeStamps.bind(this));
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this._currentAlarm = alarmQueue.shift();
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}
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this._debugCurrentAlarm();
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}.bind(this),
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function getAllErrorCb(aErrorMsg) {
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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});
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},
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_getAlarmTime: function _getAlarmTime(aAlarm) {
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// Avoid casting a Date object to a Date again to
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// preserve milliseconds. See bug 810973.
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let alarmTime;
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if (aAlarm.date instanceof Date) {
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alarmTime = aAlarm.date.getTime();
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} else {
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alarmTime = (new Date(aAlarm.date)).getTime();
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}
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// For an alarm specified with "ignoreTimezone", it must be fired respect
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// to the user's timezone. Supposing an alarm was set at 7:00pm at Tokyo,
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// it must be gone off at 7:00pm respect to Paris' local time when the user
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// is located at Paris. We can adjust the alarm UTC time by calculating
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// the difference of the orginal timezone and the current timezone.
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if (aAlarm.ignoreTimezone) {
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alarmTime +=
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(this._currentTimezoneOffset - aAlarm.timezoneOffset) * 60000;
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}
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return alarmTime;
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},
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_sortAlarmByTimeStamps: function _sortAlarmByTimeStamps(aAlarm1, aAlarm2) {
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return this._getAlarmTime(aAlarm1) - this._getAlarmTime(aAlarm2);
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},
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_debugCurrentAlarm: function _debugCurrentAlarm() {
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debug("Current alarm: " + JSON.stringify(this._currentAlarm));
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debug("Alarm queue: " + JSON.stringify(this._alarmQueue));
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},
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/**
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*
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* Add a new alarm. This will set the RTC to fire at the selected date and
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* notify the caller. Notifications are delivered via System Messages if the
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* alarm is added on behalf of a app. Otherwise aAlarmFiredCb is called.
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*
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* @param object aNewAlarm
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* Should contain the following literal properties:
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* - |date| date: when the alarm should timeout.
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* - |ignoreTimezone| boolean: See [1] for the details.
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* - |manifestURL| string: Manifest of app on whose behalf the alarm
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* is added.
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* - |pageURL| string: The page in the app that receives the system
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* message.
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* - |data| object [optional]: Data that can be stored in DB.
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* @param function aAlarmFiredCb
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* Callback function invoked when the alarm is fired.
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* It receives a single argument, the alarm object.
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* May be null.
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* @param function aSuccessCb
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* Callback function to receive an alarm ID (number).
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* @param function aErrorCb
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* Callback function to receive an error message (string).
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* @returns void
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*
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* Notes:
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* [1] https://wiki.mozilla.org/WebAPI/AlarmAPI#Proposed_API
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*/
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add: function(aNewAlarm, aAlarmFiredCb, aSuccessCb, aErrorCb) {
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debug("add(" + aNewAlarm.date + ")");
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aSuccessCb = aSuccessCb || function() {};
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aErrorCb = aErrorCb || function() {};
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if (!aNewAlarm) {
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aErrorCb("alarm is null");
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return;
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}
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if (!aNewAlarm.date) {
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aErrorCb("alarm.date is null");
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return;
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}
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aNewAlarm['timezoneOffset'] = this._currentTimezoneOffset;
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if ("manifestURL" in aNewAlarm) {
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this._db.add(aNewAlarm,
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function addSuccessCb(aNewId) {
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debug("Callback after adding alarm in database.");
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this.processNewAlarm(aNewAlarm, aNewId, aAlarmFiredCb, aSuccessCb);
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}.bind(this),
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function addErrorCb(aErrorMsg) {
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aErrorCb(aErrorMsg);
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}.bind(this));
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} else {
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// alarms without manifests are managed by chrome code. For them we use
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// negative IDs.
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this.processNewAlarm(aNewAlarm, --this.lastChromeId, aAlarmFiredCb,
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aSuccessCb);
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}
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},
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processNewAlarm: function(aNewAlarm, aNewId, aAlarmFiredCb, aSuccessCb) {
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aNewAlarm['id'] = aNewId;
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// Now that the alarm has been added to the database, we can tack on
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// the non-serializable callback to the in-memory object.
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aNewAlarm['alarmFiredCb'] = aAlarmFiredCb;
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// If the new alarm already expired at this moment, we directly
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// notify this alarm
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let newAlarmTime = this._getAlarmTime(aNewAlarm);
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if (newAlarmTime < Date.now()) {
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aSuccessCb(aNewId);
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this._removeAlarmFromDb(aNewAlarm.id, null);
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this._notifyAlarmObserver(aNewAlarm);
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return;
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}
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// If there is no alarm being set in system, set the new alarm.
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if (this._currentAlarm == null) {
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this._currentAlarm = aNewAlarm;
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this._debugCurrentAlarm();
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aSuccessCb(aNewId);
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return;
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}
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// If the new alarm is earlier than the current alarm, swap them and
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// push the previous alarm back to the queue.
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let alarmQueue = this._alarmQueue;
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let currentAlarmTime = this._getAlarmTime(this._currentAlarm);
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if (newAlarmTime < currentAlarmTime) {
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alarmQueue.unshift(this._currentAlarm);
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this._currentAlarm = aNewAlarm;
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this._debugCurrentAlarm();
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aSuccessCb(aNewId);
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return;
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}
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// Push the new alarm in the queue.
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alarmQueue.push(aNewAlarm);
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alarmQueue.sort(this._sortAlarmByTimeStamps.bind(this));
|
|
this._debugCurrentAlarm();
|
|
aSuccessCb(aNewId);
|
|
},
|
|
|
|
/*
|
|
* Remove the alarm associated with an ID.
|
|
*
|
|
* @param number aAlarmId
|
|
* The ID of the alarm to be removed.
|
|
* @param string aManifestURL
|
|
* Manifest URL for application which added the alarm. (Optional)
|
|
* @returns void
|
|
*/
|
|
remove: function(aAlarmId, aManifestURL) {
|
|
debug("remove(" + aAlarmId + ", " + aManifestURL + ")");
|
|
|
|
this._removeAlarmFromDb(aAlarmId, aManifestURL,
|
|
function removeSuccessCb() {
|
|
debug("Callback after removing alarm from database.");
|
|
|
|
// If there are no alarms set, nothing to do.
|
|
if (!this._currentAlarm) {
|
|
debug("No alarms set.");
|
|
return;
|
|
}
|
|
|
|
// Check if the alarm to be removed is in the queue and whether it
|
|
// belongs to the requesting app.
|
|
let alarmQueue = this._alarmQueue;
|
|
if (this._currentAlarm.id != aAlarmId ||
|
|
this._currentAlarm.manifestURL != aManifestURL) {
|
|
|
|
for (let i = 0; i < alarmQueue.length; i++) {
|
|
if (alarmQueue[i].id == aAlarmId &&
|
|
alarmQueue[i].manifestURL == aManifestURL) {
|
|
|
|
alarmQueue.splice(i, 1);
|
|
break;
|
|
}
|
|
}
|
|
this._debugCurrentAlarm();
|
|
return;
|
|
}
|
|
|
|
// The alarm to be removed is the current alarm reset the next alarm
|
|
// from the queue if any.
|
|
if (alarmQueue.length) {
|
|
this._currentAlarm = alarmQueue.shift();
|
|
this._debugCurrentAlarm();
|
|
return;
|
|
}
|
|
|
|
// No alarm waiting to be set in the queue.
|
|
this._currentAlarm = null;
|
|
this._debugCurrentAlarm();
|
|
}.bind(this));
|
|
},
|
|
|
|
observe: function(aSubject, aTopic, aData) {
|
|
debug("observe(): " + aTopic);
|
|
|
|
switch (aTopic) {
|
|
case "profile-change-teardown":
|
|
this.uninit();
|
|
break;
|
|
|
|
case "webapps-clear-data":
|
|
let params =
|
|
aSubject.QueryInterface(Ci.mozIApplicationClearPrivateDataParams);
|
|
if (!params) {
|
|
debug("Error! Fail to remove alarms for an uninstalled app.");
|
|
return;
|
|
}
|
|
|
|
// Only remove alarms for apps.
|
|
if (params.browserOnly) {
|
|
return;
|
|
}
|
|
|
|
let manifestURL = appsService.getManifestURLByLocalId(params.appId);
|
|
if (!manifestURL) {
|
|
debug("Error! Fail to remove alarms for an uninstalled app.");
|
|
return;
|
|
}
|
|
|
|
this._db.getAll(manifestURL,
|
|
function getAllSuccessCb(aAlarms) {
|
|
aAlarms.forEach(function removeAlarm(aAlarm) {
|
|
this.remove(aAlarm.id, manifestURL);
|
|
}, this);
|
|
}.bind(this),
|
|
function getAllErrorCb(aErrorMsg) {
|
|
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
|
|
});
|
|
break;
|
|
}
|
|
},
|
|
|
|
uninit: function uninit() {
|
|
debug("uninit()");
|
|
|
|
Services.obs.removeObserver(this, "profile-change-teardown");
|
|
Services.obs.removeObserver(this, "webapps-clear-data");
|
|
|
|
this._messages.forEach(function(aMsgName) {
|
|
ppmm.removeMessageListener(aMsgName, this);
|
|
}.bind(this));
|
|
ppmm = null;
|
|
|
|
if (this._db) {
|
|
this._db.close();
|
|
}
|
|
this._db = null;
|
|
|
|
this._alarmHalService = null;
|
|
}
|
|
}
|
|
|
|
AlarmService.init();
|