# Source: system/Device.js

    /**
    * @author       Richard Davey <rich@photonstorm.com>
    * @copyright    2014 Photon Storm Ltd.
    * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
    */

    /**
    * Detects device support capabilities. Using some elements from System.js by MrDoob and Modernizr
    *
    * @class Phaser.Device
    * @constructor
    */

    Phaser.Device = function (game) {

        /**
        * @property {Phaser.Game} game - A reference to the currently running game.
        */
        this.game = game;

        //  Operating System

        /**
        * @property {boolean} desktop - Is running desktop?
        * @default
        */
        this.desktop = false;

        /**
        * @property {boolean} iOS - Is running on iOS?
        * @default
        */
        this.iOS = false;

        /**
        * @property {boolean} cocoonJS - Is the game running under CocoonJS?
        * @default
        */
        this.cocoonJS = false;

        /**
        * @property {boolean} ejecta - Is the game running under Ejecta?
        * @default
        */
        this.ejecta = false;

        /**
        * @property {boolean} crosswalk - Is the game running under the Intel Crosswalk XDK?
        * @default
        */
        this.crosswalk = false;

        /**
        * @property {boolean} android - Is running on android?
        * @default
        */
        this.android = false;

        /**
        * @property {boolean} chromeOS - Is running on chromeOS?
        * @default
        */
        this.chromeOS = false;

        /**
        * @property {boolean} linux - Is running on linux?
        * @default
        */
        this.linux = false;

        /**
        * @property {boolean} macOS - Is running on macOS?
        * @default
        */
        this.macOS = false;

        /**
        * @property {boolean} windows - Is running on windows?
        * @default
        */
        this.windows = false;

        /**
        * @property {boolean} windowsPhone - Is running on a Windows Phone?
        * @default
        */
        this.windowsPhone = false;

        //  Features

        /**
        * @property {boolean} canvas - Is canvas available?
        * @default
        */
        this.canvas = false;

        /**
        * @property {boolean} file - Is file available?
        * @default
        */
        this.file = false;

        /**
        * @property {boolean} fileSystem - Is fileSystem available?
        * @default
        */
        this.fileSystem = false;

        /**
        * @property {boolean} localStorage - Is localStorage available?
        * @default
        */
        this.localStorage = false;

        /**
        * @property {boolean} webGL - Is webGL available?
        * @default
        */
        this.webGL = false;

        /**
        * @property {boolean} worker - Is worker available?
        * @default
        */
        this.worker = false;

        /**
        * @property {boolean} touch - Is touch available?
        * @default
        */
        this.touch = false;

        /**
        * @property {boolean} mspointer - Is mspointer available?
        * @default
        */
        this.mspointer = false;

        /**
        * @property {boolean} css3D - Is css3D available?
        * @default
        */
        this.css3D = false;

        /**
        * @property {boolean} pointerLock - Is Pointer Lock available?
        * @default
        */
        this.pointerLock = false;

        /**
        * @property {boolean} typedArray - Does the browser support TypedArrays?
        * @default
        */
        this.typedArray = false;

        /**
        * @property {boolean} vibration - Does the device support the Vibration API?
        * @default
        */
        this.vibration = false;

        /**
        * @property {boolean} getUserMedia - Does the device support the getUserMedia API?
        * @default
        */
        this.getUserMedia = false;

        /**
        * @property {boolean} quirksMode - Is the browser running in strict mode (false) or quirks mode? (true)
        * @default
        */
        this.quirksMode = false;

        //  Browser

        /**
        * @property {boolean} arora - Set to true if running in Arora.
        * @default
        */
        this.arora = false;

        /**
        * @property {boolean} chrome - Set to true if running in Chrome.
        * @default
        */
        this.chrome = false;

        /**
        * @property {boolean} epiphany - Set to true if running in Epiphany.
        * @default
        */
        this.epiphany = false;

        /**
        * @property {boolean} firefox - Set to true if running in Firefox.
        * @default
        */
        this.firefox = false;

        /**
        * @property {boolean} ie - Set to true if running in Internet Explorer.
        * @default
        */
        this.ie = false;

        /**
        * @property {number} ieVersion - If running in Internet Explorer this will contain the major version number. Beyond IE10 you should use Device.trident and Device.tridentVersion.
        * @default
        */
        this.ieVersion = 0;

        /**
        * @property {boolean} trident - Set to true if running a Trident version of Internet Explorer (IE11+)
        * @default
        */
        this.trident = false;

        /**
        * @property {number} tridentVersion - If running in Internet Explorer 11 this will contain the major version number. See http://msdn.microsoft.com/en-us/library/ie/ms537503(v=vs.85).aspx
        * @default
        */
        this.tridentVersion = 0;

        /**
        * @property {boolean} mobileSafari - Set to true if running in Mobile Safari.
        * @default
        */
        this.mobileSafari = false;

        /**
        * @property {boolean} midori - Set to true if running in Midori.
        * @default
        */
        this.midori = false;

        /**
        * @property {boolean} opera - Set to true if running in Opera.
        * @default
        */
        this.opera = false;

        /**
        * @property {boolean} safari - Set to true if running in Safari.
        * @default
        */
        this.safari = false;

        /**
        * @property {boolean} webApp - Set to true if running as a WebApp, i.e. within a WebView
        * @default
        */
        this.webApp = false;

        /**
        * @property {boolean} silk - Set to true if running in the Silk browser (as used on the Amazon Kindle)
        * @default
        */
        this.silk = false;

        //  Audio

        /**
        * @property {boolean} audioData - Are Audio tags available?
        * @default
        */
        this.audioData = false;

        /**
        * @property {boolean} webAudio - Is the WebAudio API available?
        * @default
        */
        this.webAudio = false;

        /**
        * @property {boolean} ogg - Can this device play ogg files?
        * @default
        */
        this.ogg = false;

        /**
        * @property {boolean} opus - Can this device play opus files?
        * @default
        */
        this.opus = false;

        /**
        * @property {boolean} mp3 - Can this device play mp3 files?
        * @default
        */
        this.mp3 = false;

        /**
        * @property {boolean} wav - Can this device play wav files?
        * @default
        */
        this.wav = false;

        /**
        * Can this device play m4a files?
        * @property {boolean} m4a - True if this device can play m4a files.
        * @default
        */
        this.m4a = false;

        /**
        * @property {boolean} webm - Can this device play webm files?
        * @default
        */
        this.webm = false;

        //  Device

        /**
        * @property {boolean} iPhone - Is running on iPhone?
        * @default
        */
        this.iPhone = false;

        /**
        * @property {boolean} iPhone4 - Is running on iPhone4?
        * @default
        */
        this.iPhone4 = false;

        /**
        * @property {boolean} iPad - Is running on iPad?
        * @default
        */
        this.iPad = false;

        /**
        * @property {number} pixelRatio - PixelRatio of the host device?
        * @default
        */
        this.pixelRatio = 0;

        /**
        * @property {boolean} littleEndian - Is the device big or little endian? (only detected if the browser supports TypedArrays)
        * @default
        */
        this.littleEndian = false;

        /**
        * @property {boolean} support32bit - Does the device context support 32bit pixel manipulation using array buffer views?
        * @default
        */
        this.support32bit = false;

        /**
        * @property {boolean} fullscreen - Does the browser support the Full Screen API?
        * @default
        */
        this.fullscreen = false;

        /**
        * @property {string} requestFullscreen - If the browser supports the Full Screen API this holds the call you need to use to activate it.
        * @default
        */
        this.requestFullscreen = '';

        /**
        * @property {string} cancelFullscreen - If the browser supports the Full Screen API this holds the call you need to use to cancel it.
        * @default
        */
        this.cancelFullscreen = '';

        /**
        * @property {boolean} fullscreenKeyboard - Does the browser support access to the Keyboard during Full Screen mode?
        * @default
        */
        this.fullscreenKeyboard = false;

        //  Run the checks
        this._checkAudio();
        this._checkBrowser();
        this._checkCSS3D();
        this._checkDevice();
        this._checkFeatures();
        this._checkOS();

    };

    Phaser.Device.LITTLE_ENDIAN = false;

    Phaser.Device.prototype = {

        /**
        * Check which OS is game running on.
        * @method Phaser.Device#_checkOS
        * @private
        */
        _checkOS: function () {

            var ua = navigator.userAgent;

            if (/Android/.test(ua))
            {
                this.android = true;
            }
            else if (/CrOS/.test(ua))
            {
                this.chromeOS = true;
            }
            else if (/iP[ao]d|iPhone/i.test(ua))
            {
                this.iOS = true;
            }
            else if (/Linux/.test(ua))
            {
                this.linux = true;
            }
            else if (/Mac OS/.test(ua))
            {
                this.macOS = true;
            }
            else if (/Windows/.test(ua))
            {
                this.windows = true;

                if (/Windows Phone/i.test(ua))
                {
                    this.windowsPhone = true;
                }
            }

            if (this.windows || this.macOS || (this.linux && this.silk === false))
            {
                this.desktop = true;
            }

            //  Windows Phone / Table reset
            if (this.windowsPhone || ((/Windows NT/i.test(ua)) && (/Touch/i.test(ua))))
            {
                this.desktop = false;
            }

        },

        /**
        * Check HTML5 features of the host environment.
        * @method Phaser.Device#_checkFeatures
        * @private
        */
        _checkFeatures: function () {

            this.canvas = !!window['CanvasRenderingContext2D'] || this.cocoonJS;

            try {
                this.localStorage = !!localStorage.getItem;
            } catch (error) {
                this.localStorage = false;
            }

            this.file = !!window['File'] && !!window['FileReader'] && !!window['FileList'] && !!window['Blob'];
            this.fileSystem = !!window['requestFileSystem'];
            this.webGL = ( function () { try { var canvas = document.createElement( 'canvas' ); return !! window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ); } catch( e ) { return false; } } )();

            if (this.webGL === null || this.webGL === false)
            {
                this.webGL = false;
            }
            else
            {
                this.webGL = true;
            }

            this.worker = !!window['Worker'];

            if ('ontouchstart' in document.documentElement || (window.navigator.maxTouchPoints && window.navigator.maxTouchPoints > 1))
            {
                this.touch = true;
            }

            if (window.navigator.msPointerEnabled || window.navigator.pointerEnabled)
            {
                this.mspointer = true;
            }

            this.pointerLock = 'pointerLockElement' in document || 'mozPointerLockElement' in document || 'webkitPointerLockElement' in document;

            this.quirksMode = (document.compatMode === 'CSS1Compat') ? false : true;

            this.getUserMedia = !!(navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia);

        },

        /**
        * Checks for support of the Full Screen API.
        *
        * @method Phaser.Device#checkFullScreenSupport
        */
        checkFullScreenSupport: function () {

            var fs = [
                'requestFullscreen',
                'requestFullScreen',
                'webkitRequestFullscreen',
                'webkitRequestFullScreen',
                'msRequestFullscreen',
                'msRequestFullScreen',
                'mozRequestFullScreen',
                'mozRequestFullscreen'
            ];

            for (var i = 0; i < fs.length; i++)
            {
                if (this.game.canvas[fs[i]])
                {
                    this.fullscreen = true;
                    this.requestFullscreen = fs[i];
                }
            }

            var cfs = [
                'cancelFullScreen',
                'exitFullscreen',
                'webkitCancelFullScreen',
                'webkitExitFullscreen',
                'msCancelFullScreen',
                'msExitFullscreen',
                'mozCancelFullScreen',
                'mozExitFullscreen'
            ];

            if (this.fullscreen)
            {
                for (var i = 0; i < cfs.length; i++)
                {
                    if (this.game.canvas[cfs[i]])
                    {
                        this.cancelFullscreen = cfs[i];
                    }
                }
            }

            //  Keyboard Input?
            if (window['Element'] && Element['ALLOW_KEYBOARD_INPUT'])
            {
                this.fullscreenKeyboard = true;
            }

        },

        /**
        * Check what browser is game running in.
        * @method Phaser.Device#_checkBrowser
        * @private
        */
        _checkBrowser: function () {

            var ua = navigator.userAgent;

            if (/Arora/.test(ua))
            {
                this.arora = true;
            }
            else if (/Chrome/.test(ua))
            {
                this.chrome = true;
            }
            else if (/Epiphany/.test(ua))
            {
                this.epiphany = true;
            }
            else if (/Firefox/.test(ua))
            {
                this.firefox = true;
            }
            else if (/Mobile Safari/.test(ua))
            {
                this.mobileSafari = true;
            }
            else if (/MSIE (\d+\.\d+);/.test(ua))
            {
                this.ie = true;
                this.ieVersion = parseInt(RegExp.$1, 10);
            }
            else if (/Midori/.test(ua))
            {
                this.midori = true;
            }
            else if (/Opera/.test(ua))
            {
                this.opera = true;
            }
            else if (/Safari/.test(ua))
            {
                this.safari = true;
            }
            else if (/Trident\/(\d+\.\d+)(.*)rv:(\d+\.\d+)/.test(ua))
            {
                this.ie = true;
                this.trident = true;
                this.tridentVersion = parseInt(RegExp.$1, 10);
                this.ieVersion = parseInt(RegExp.$3, 10);
            }

            //Silk gets its own if clause because its ua also contains 'Safari'
            if (/Silk/.test(ua))
            {
                this.silk = true;
            }

            // WebApp mode in iOS
            if (navigator['standalone'])
            {
                this.webApp = true;
            }

            if (navigator['isCocoonJS'])
            {
                this.cocoonJS = true;
            }

            if (typeof window.ejecta !== "undefined")
            {
                this.ejecta = true;
            }

            if (/Crosswalk/.test(ua))
            {
                this.crosswalk = true;
            }

        },

        /**
        * Check audio support.
        * @method Phaser.Device#_checkAudio
        * @private
        */
        _checkAudio: function () {

            this.audioData = !!(window['Audio']);
            this.webAudio = !!(window['webkitAudioContext'] || window['AudioContext']);
            var audioElement = document.createElement('audio');
            var result = false;

            try {
                if (result = !!audioElement.canPlayType) {

                    if (audioElement.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, '')) {
                        this.ogg = true;
                    }

                    if (audioElement.canPlayType('audio/ogg; codecs="opus"').replace(/^no$/, '')) {
                        this.opus = true;
                    }

                    if (audioElement.canPlayType('audio/mpeg;').replace(/^no$/, '')) {
                        this.mp3 = true;
                    }

                    // Mimetypes accepted:
                    //   developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
                    //   bit.ly/iphoneoscodecs
                    if (audioElement.canPlayType('audio/wav; codecs="1"').replace(/^no$/, '')) {
                        this.wav = true;
                    }

                    if (audioElement.canPlayType('audio/x-m4a;') || audioElement.canPlayType('audio/aac;').replace(/^no$/, '')) {
                        this.m4a = true;
                    }

                    if (audioElement.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/, '')) {
                        this.webm = true;
                    }
                }
            } catch (e) {
            }

        },

        /**
        * Check PixelRatio, iOS device, Vibration API, ArrayBuffers and endianess.
        * @method Phaser.Device#_checkDevice
        * @private
        */
        _checkDevice: function () {

            this.pixelRatio = window['devicePixelRatio'] || 1;
            this.iPhone = navigator.userAgent.toLowerCase().indexOf('iphone') != -1;
            this.iPhone4 = (this.pixelRatio == 2 && this.iPhone);
            this.iPad = navigator.userAgent.toLowerCase().indexOf('ipad') != -1;

            if (typeof Int8Array !== 'undefined')
            {
                this.typedArray = true;
            }
            else
            {
                this.typedArray = false;
            }

            if (typeof ArrayBuffer !== 'undefined' && typeof Uint8Array !== 'undefined' && typeof Uint32Array !== 'undefined')
            {
                this.littleEndian = this._checkIsLittleEndian();
                Phaser.Device.LITTLE_ENDIAN = this.littleEndian;
            }

            this.support32bit = (typeof ArrayBuffer !== "undefined" && typeof Uint8ClampedArray !== "undefined" && typeof Int32Array !== "undefined" && this.littleEndian !== null && this._checkIsUint8ClampedImageData());

            navigator.vibrate = navigator.vibrate || navigator.webkitVibrate || navigator.mozVibrate || navigator.msVibrate;

            if (navigator.vibrate)
            {
                this.vibration = true;
            }

        },

        /**
        * Check Little or Big Endian system.
        * @author Matt DesLauriers (@mattdesl)
        * @method Phaser.Device#_checkIsLittleEndian
        * @private
        */
        _checkIsLittleEndian: function () {

            var a = new ArrayBuffer(4);
            var b = new Uint8Array(a);
            var c = new Uint32Array(a);

            b[0] = 0xa1;
            b[1] = 0xb2;
            b[2] = 0xc3;
            b[3] = 0xd4;

            if (c[0] == 0xd4c3b2a1)
            {
                return true;
            }

            if (c[0] == 0xa1b2c3d4)
            {
                return false;
            }
            else
            {
                //  Could not determine endianness
                return null;
            }

        },

        /**
        * Test to see if ImageData uses CanvasPixelArray or Uint8ClampedArray.
        * @author Matt DesLauriers (@mattdesl)
        * @method Phaser.Device#_checkIsUint8ClampedImageData
        * @private
        */
        _checkIsUint8ClampedImageData: function () {

            if (typeof Uint8ClampedArray === "undefined")
            {
                return false;
            }

            var elem = document.createElement('canvas');
            var ctx = elem.getContext('2d');

            if (!ctx)
            {
                return false;
            }

            var image = ctx.createImageData(1, 1);

            return image.data instanceof Uint8ClampedArray;

        },

        /**
        * Check whether the host environment support 3D CSS.
        * @method Phaser.Device#_checkCSS3D
        * @private
        */
        _checkCSS3D: function () {

            var el = document.createElement('p');
            var has3d;
            var transforms = {
                'webkitTransform': '-webkit-transform',
                'OTransform': '-o-transform',
                'msTransform': '-ms-transform',
                'MozTransform': '-moz-transform',
                'transform': 'transform'
            };

            // Add it to the body to get the computed style.
            document.body.insertBefore(el, null);

            for (var t in transforms)
            {
                if (el.style[t] !== undefined)
                {
                    el.style[t] = "translate3d(1px,1px,1px)";
                    has3d = window.getComputedStyle(el).getPropertyValue(transforms[t]);
                }
            }

            document.body.removeChild(el);
            this.css3D = (has3d !== undefined && has3d.length > 0 && has3d !== "none");

        },

        /**
        * Check whether the host environment can play audio.
        * @method Phaser.Device#canPlayAudio
        * @param {string} type - One of 'mp3, 'ogg', 'm4a', 'wav', 'webm'.
        * @return {boolean} True if the given file type is supported by the browser, otherwise false.
        */
        canPlayAudio: function (type) {

            if (type == 'mp3' && this.mp3)
            {
                return true;
            }
            else if (type == 'ogg' && (this.ogg || this.opus))
            {
                return true;
            }
            else if (type == 'm4a' && this.m4a)
            {
                return true;
            }
            else if (type == 'wav' && this.wav)
            {
                return true;
            }
            else if (type == 'webm' && this.webm)
            {
                return true;
            }

            return false;

        },

        /**
        * Check whether the console is open.
        * Note that this only works in Firefox with Firebug and earlier versions of Chrome.
        * It used to work in Chrome, but then they removed the ability: http://src.chromium.org/viewvc/blink?view=revision&revision=151136
        *
        * @method Phaser.Device#isConsoleOpen
        * @return {boolean} True if the browser dev console is open.
        */
        isConsoleOpen: function () {

            if (window.console && window.console['firebug'])
            {
                return true;
            }

            if (window.console)
            {
                console.profile();
                console.profileEnd();

                if (console.clear)
                {
                    console.clear();
                }

                if (console['profiles'])
                {
                    return console['profiles'].length > 0;
                }
            }

            return false;

        }

    };

    Phaser.Device.prototype.constructor = Phaser.Device;