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Bug 738529 - Check "screen" wake lock before turning off screen. r=cjones

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This commit is contained in:
Kan-Ru Chen 2012-03-23 21:50:29 +01:00
parent a75f61a407
commit 078715dcff
1 changed files with 24 additions and 5 deletions
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29
b2g/chrome/content/shell.js
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@ -327,17 +327,36 @@ var shell = {
};
(function PowerManager() {
let idleHandler = {
observe: function(subject, topic, time) {
if (topic === "idle") {
// TODO: Check wakelock status. See bug 697132.
// This will eventually be moved to content, so use content API as
// much as possible here. TODO: Bug 738530
let power = navigator.mozPower;
let idleHandler = function idleHandler(subject, topic, time) {
if (topic === "idle") {
if (power.getWakeLockState("screen") != "locked-foreground") {
screen.mozEnabled = false;
}
},
}
}
let wakeLockHandler = function wakeLockHandler(topic, state) {
// Turn off the screen when no one needs the it or all of them are
// invisible, otherwise turn the screen on. Note that the CPU
// might go to sleep as soon as the screen is turned off and
// acquiring wake lock will not bring it back (actually the code
// is not executed at all).
if (topic == "screen") {
if (state != "locked-foreground") {
if (Services.idle.idleTime > idleTimeout*1000) {
screen.mozEnabled = false;
}
} else {
screen.mozEnabled = true;
}
}
}
let idleTimeout = Services.prefs.getIntPref("power.screen.timeout");
if (idleTimeout) {
Services.idle.addIdleObserver(idleHandler, idleTimeout);
power.addWakeLockListener(wakeLockHandler);
}
})();