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195 lines
7.2 KiB
Java
195 lines
7.2 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Android code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mounir Lamouri <mounir.lamouri@mozilla.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.gecko;
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import java.lang.Math;
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import java.util.Date;
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import android.util.Log;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.os.BatteryManager;
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import android.os.Build;
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import android.os.SystemClock;
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public class GeckoBatteryManager
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extends BroadcastReceiver
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{
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private static final String LOGTAG = "GeckoBatteryManager";
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// Those constants should be keep in sync with the ones in:
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// dom/battery/Constants.h
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private final static double kDefaultLevel = 1.0;
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private final static boolean kDefaultCharging = true;
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private final static double kDefaultRemainingTime = -1.0;
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private final static double kUnknownRemainingTime = -1.0;
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private static long sLastLevelChange = 0;
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private static boolean sNotificationsEnabled = false;
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private static double sLevel = kDefaultLevel;
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private static boolean sCharging = kDefaultCharging;
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private static double sRemainingTime = kDefaultRemainingTime;;
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@Override
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public void onReceive(Context context, Intent intent) {
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if (!intent.getAction().equals(Intent.ACTION_BATTERY_CHANGED)) {
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Log.e(LOGTAG, "Got an unexpected intent!");
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return;
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}
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boolean previousCharging = isCharging();
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double previousLevel = getLevel();
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// NOTE: it might not be common (in 2012) but technically, Android can run
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// on a device that has no battery so we want to make sure it's not the case
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// before bothering checking for battery state.
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// However, the Galaxy Nexus phone advertizes itself as battery-less which
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// force us to special-case the logic.
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// See the Google bug: https://code.google.com/p/android/issues/detail?id=22035
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if (intent.getBooleanExtra(BatteryManager.EXTRA_PRESENT, false) ||
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Build.MODEL.equals("Galaxy Nexus")) {
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int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
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if (plugged == -1) {
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sCharging = kDefaultCharging;
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Log.e(LOGTAG, "Failed to get the plugged status!");
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} else {
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// Likely, if plugged > 0, it's likely plugged and charging but the doc
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// isn't clear about that.
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sCharging = plugged != 0;
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}
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if (sCharging != previousCharging) {
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sRemainingTime = kUnknownRemainingTime;
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// The new remaining time is going to take some time to show up but
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// it's the best way to show a not too wrong value.
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sLastLevelChange = 0;
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}
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// We need two doubles because sLevel is a double.
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double current = (double)intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
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double max = (double)intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
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if (current == -1 || max == -1) {
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Log.e(LOGTAG, "Failed to get battery level!");
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sLevel = kDefaultLevel;
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} else {
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sLevel = current / max;
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}
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if (sLevel == 1.0 && sCharging) {
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sRemainingTime = 0.0;
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} else if (sLevel != previousLevel) {
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// Estimate remaining time.
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if (sLastLevelChange != 0) {
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// Use elapsedRealtime() because we want to track time across device sleeps.
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long currentTime = SystemClock.elapsedRealtime();
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long dt = (currentTime - sLastLevelChange) / 1000;
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double dLevel = sLevel - previousLevel;
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if (sCharging) {
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if (dLevel < 0) {
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Log.w(LOGTAG, "When charging, level should increase!");
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sRemainingTime = kUnknownRemainingTime;
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} else {
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sRemainingTime = Math.round(dt / dLevel * (1.0 - sLevel));
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}
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} else {
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if (dLevel > 0) {
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Log.w(LOGTAG, "When discharging, level should decrease!");
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sRemainingTime = kUnknownRemainingTime;
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} else {
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sRemainingTime = Math.round(dt / -dLevel * sLevel);
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}
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}
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sLastLevelChange = currentTime;
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} else {
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// That's the first time we got an update, we can't do anything.
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sLastLevelChange = SystemClock.elapsedRealtime();
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}
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}
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} else {
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sLevel = kDefaultLevel;
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sCharging = kDefaultCharging;
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sRemainingTime = 0;
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}
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/*
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* We want to inform listeners if the following conditions are fulfilled:
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* - we have at least one observer;
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* - the charging state or the level has changed.
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*
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* Note: no need to check for a remaining time change given that it's only
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* updated if there is a level change or a charging change.
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*
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* The idea is to prevent doing all the way to the DOM code in the child
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* process to finally not send an event.
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*/
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if (sNotificationsEnabled &&
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(previousCharging != isCharging() || previousLevel != getLevel())) {
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GeckoAppShell.notifyBatteryChange(getLevel(), isCharging(), getRemainingTime());
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}
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}
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public static boolean isCharging() {
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return sCharging;
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}
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public static double getLevel() {
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return sLevel;
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}
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public static double getRemainingTime() {
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return sRemainingTime;
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}
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public static void enableNotifications() {
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sNotificationsEnabled = true;
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}
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public static void disableNotifications() {
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sNotificationsEnabled = false;
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}
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public static double[] getCurrentInformation() {
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return new double[] { getLevel(), isCharging() ? 1.0 : 0.0, getRemainingTime() };
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}
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}
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