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fullscreen_v2.js
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fullscreen_v2.js
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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview
* Full-screen implementation for apps v2, using chrome.AppWindow.
*/
'use strict';
/** @suppress {duplicate} */
var remoting = remoting || {};
/**
* @constructor
* @implements {remoting.Fullscreen}
*/
remoting.FullscreenAppsV2 = function() {
/**
* @type {boolean} True if the window is minimized. onRestored fires when the
* the window transitions from minimized to any other state, but since we
* only want transitions from full-screen to windowed to cause a callback,
* we must keep track of the minimized state of the window.
* @private
*/
this.isMinimized_ = chrome.app.window.current().isMinimized();
/**
* @type {?boolean} The most recent full-screen state passed to the callback.
* This guards against redundant invocations, as as would otherwise occur
* in response to a full-screen -> maximized -> unmaximized transition,
* because this results in two onRestored callbacks.
*/
this.previousCallbackState_ = null;
/**
* @type {string} Internal 'full-screen changed' event name.
* @private
*/
this.kEventName_ = '_fullscreenchanged';
/**
* @type {base.EventSourceImpl}
* @private
*/
this.eventSource_ = new base.EventSourceImpl();
this.eventSource_.defineEvents([this.kEventName_]);
chrome.app.window.current().onFullscreened.addListener(
this.onFullscreened_.bind(this));
chrome.app.window.current().onRestored.addListener(
this.onRestored_.bind(this));
chrome.app.window.current().onMinimized.addListener(
this.onMinimized_.bind(this));
document.body.classList.toggle('fullscreen', this.isActive());
};
/**
* @param {boolean} fullscreen True to enter full-screen mode; false to leave.
* @param {function():void=} opt_onDone Optional completion callback.
*/
remoting.FullscreenAppsV2.prototype.activate = function(
fullscreen, opt_onDone) {
if (opt_onDone) {
if (this.isActive() == fullscreen) {
opt_onDone();
} else {
/** @type {remoting.Fullscreen} */
var that = this;
var callbackAndRemoveListener = function() {
that.removeListener(callbackAndRemoveListener);
opt_onDone();
};
this.addListener(callbackAndRemoveListener);
}
}
if (fullscreen) {
chrome.app.window.current().fullscreen();
} else if (this.isActive()) {
chrome.app.window.current().restore();
}
};
remoting.FullscreenAppsV2.prototype.toggle = function() {
this.activate(!this.isActive());
};
/**
* @return {boolean}
*/
remoting.FullscreenAppsV2.prototype.isActive = function() {
return chrome.app.window.current().isFullscreen();
};
/**
* @param {function(boolean=):void} callback
*/
remoting.FullscreenAppsV2.prototype.addListener = function(callback) {
this.eventSource_.addEventListener(this.kEventName_, callback);
};
/**
* @param {function(boolean=):void} callback
*/
remoting.FullscreenAppsV2.prototype.removeListener = function(callback) {
this.eventSource_.removeEventListener(this.kEventName_, callback);
};
/**
* @private
*/
remoting.FullscreenAppsV2.prototype.onFullscreened_ = function() {
this.isMinimized_ = false;
this.raiseEvent_(true);
document.body.classList.add('fullscreen');
};
/**
* @private
*/
remoting.FullscreenAppsV2.prototype.onRestored_ = function() {
if (!this.isMinimized_) {
document.body.classList.remove('fullscreen');
this.raiseEvent_(false);
}
this.isMinimized_ = false;
};
/**
* @private
*/
remoting.FullscreenAppsV2.prototype.onMinimized_ = function() {
this.isMinimized_ = true;
};
/**
* @param {boolean} isFullscreen
* @private
*/
remoting.FullscreenAppsV2.prototype.raiseEvent_ = function(isFullscreen) {
if (isFullscreen !== this.previousCallbackState_) {
this.previousCallbackState_ = isFullscreen;
this.eventSource_.raiseEvent(this.kEventName_, isFullscreen);
}
};