/**
  *  Copyright (C) 2021  Double Bastion LLC
  *
  *  This file is part of Roundpin, which is licensed under the
  *  GNU Affero General Public License Version 3.0. The license terms
  *  are detailed in the "LICENSE.txt" file located in the root directory.
  *
  *  The file content from below is identical with that of the
  *  original file "utils.js". The copyright notice for the
  *  original content follows.
  */
 ///////////////////////////////////////////////////////////////////////////////
 //  Cyber Mega Phone 2K
 //  Copyright (C) 2017 Digium, Inc.
 //
 //  This program is free software, distributed under the terms of the
 //  MIT License. See the LICENSE file at the top of the source tree.
 ///////////////////////////////////////////////////////////////////////////////
 
 function FullScreen(obj) {
 	this._obj = obj;
 }
 
 FullScreen.prototype.can = function () {
 	return !!(document.fullscreenEnabled || document.mozFullScreenEnabled ||
 			document.msFullscreenEnabled || document.webkitSupportsFullscreen ||
 			document.webkitFullscreenEnabled);
 };
 
 FullScreen.prototype.is = function() {
 	return !!(document.fullScreen || document.webkitIsFullScreen ||
 			document.mozFullScreen || document.msFullscreenElement ||
 			document.fullscreenElement);
 };
 
 FullScreen.prototype.setData = function(state) {
 	this._obj.setAttribute('data-fullscreen', !!state);
 };
 
 FullScreen.prototype.exit = function() {
 	if (!this.is()) {
 		return;
 	}
 
 	if (document.exitFullscreen) {
 		document.exitFullscreen();
 	} else if (document.mozCancelFullScreen) {
 		document.mozCancelFullScreen();
 	} else if (document.webkitCancelFullScreen) {
 		document.webkitCancelFullScreen();
 	} else if (document.msExitFullscreen) {
 		document.msExitFullscreen();
 	}
 
 	this.setData(false);
 };