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Enhanced page visibility checks added

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Richard Davey
2014-02-22 02:36:02 +00:00
parent bd24dab2f6
commit b2da49eefa
1 changed files with 39 additions and 5 deletions
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src/core/Stage.js
+39 -5
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@@ -55,6 +55,12 @@ Phaser.Stage = function (game, width, height) {
*/
this.exists = true;
/**
* @property {string} hiddenVar - The page visibility API event name.
* @private
*/
this._hiddenVar = 'hidden';
/**
* @property {number} _nextOffsetCheck - The time to run the next offset check.
* @private
@@ -230,10 +236,38 @@ Phaser.Stage.prototype.boot = function () {
Phaser.Canvas.setUserSelect(this.game.canvas, 'none');
Phaser.Canvas.setTouchAction(this.game.canvas, 'none');
document.addEventListener('visibilitychange', this._onChange, false);
document.addEventListener('webkitvisibilitychange', this._onChange, false);
document.addEventListener('pagehide', this._onChange, false);
document.addEventListener('pageshow', this._onChange, false);
this.checkVisibility();
}
/**
* Starts a page visibility event listener running, or window.blur/focus if not supported by the browser.
* @method Phaser.Stage#checkVisibility
*/
Phaser.Stage.prototype.checkVisibility = function () {
var supportsVisibilityApi = false;
var prefixes = [ "", "moz", "ms", "webkit" ];
while (prefixes.length)
{
prefix = prefixes.pop();
this._hiddenVar = prefix ? prefix + "Hidden" : "hidden";
if (this._hiddenVar in document)
{
supportsVisibilityApi = true;
break;
}
}
// Does browser support it? If not (like in IE9 or old Android) we need to fall back to blur/focus
if (supportsVisibilityApi)
{
document.addEventListener(this._hiddenVar, this._onChange, false);
document.addEventListener('pagehide', this._onChange, false);
document.addEventListener('pageshow', this._onChange, false);
}
window.onblur = this._onChange;
window.onfocus = this._onChange;
@@ -270,7 +304,7 @@ Phaser.Stage.prototype.visibilityChange = function (event) {
return;
}
if (this.game.paused === false && (event.type == 'pagehide' || event.type == 'blur' || document['hidden'] === true || document['webkitHidden'] === true))
if (this.game.paused === false && (event.type === 'pagehide' || event.type === 'blur' || document[this._hiddenVar] === true))
{
this.game.paused = true;
}