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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | 1x 30x 41x 41x 41x 24x 17x 30x 30x 10x 10x 10x 14x 14x 14x 8x 4x 2x 2x 6x 10x 2x 2x 10x 15x 1x 1x 15x 1x | const util = require( './util' );
let browser;
/**
* Memoize a class method. Caches the result of the method based on the
* arguments. Instances do not share a cache.
*
* @private
* @param {Function} method Method to be memoized
* @return {Function}
*/
function memoize( method ) {
/**
* Memoized version of the method
*
* @return {Function}
*/
const memoized = function () {
const cache = this[ '__cache' + memoized.cacheId ] ||
( this[ '__cache' + memoized.cacheId ] = {} ),
key = [].join.call( arguments, '|' );
if ( Object.prototype.hasOwnProperty.call( cache, key ) ) {
return cache[ key ];
}
return ( cache[ key ] = method.apply( this, arguments ) );
};
memoized.cacheId = Date.now().toString() + Math.random().toString();
return memoized;
}
/**
* Representation of user's current browser
*
* @class Browser
* @private
*/
class Browser {
/**
* @param {string} userAgent the user agent of the current browser
* @param {jQuery.Object} $container an element to associate with the Browser object
*/
constructor( userAgent, $container ) {
this.userAgent = userAgent;
this.$el = $container;
/**
* Returns whether the current browser is an ios device.
* FIXME: jquery.client does not support iPad detection so we cannot use it.
*
* @instance
* @param {number} [version] integer describing a specific version you want to test against.
* @return {boolean}
*/
this.isIos = memoize( function ( version ) {
const ua = this.userAgent,
ios = /ipad|iphone|ipod/i.test( ua );
if ( ios && version ) {
switch ( version ) {
case 8:
// Test UA for iOS8. Or for simulator look for Version 8
// In the iOS simulator the OS is the host machine OS version
// This makes testing in iOS8 simulator work as expected
return /OS 8_/.test( ua ) || /Version\/8/.test( ua );
case 4:
return /OS 4_/.test( ua );
case 5:
return /OS 5_/.test( ua );
default:
return false;
}
} else {
return ios;
}
} );
/**
* Determine if a device has a widescreen.
*
* @instance
* @return {boolean}
*/
this.isWideScreen = memoize( () => {
const val = parseInt( mw.config.get( 'wgMFDeviceWidthTablet' ), 10 );
// Check viewport width to determine mobile vs tablet.
// Note: Mobile devices held in landscape mode might receive tablet treatment.
return window.innerWidth >= val;
} );
/**
* Whether touchstart and other touch events are supported by the current browser.
*
* @instance
* @return {boolean}
*/
this.supportsTouchEvents = memoize( () => 'ontouchstart' in window );
}
/**
* @return {Browser}
*/
static getSingleton() {
let $html;
if ( !browser ) {
$html = util.getDocument();
browser = new Browser( window.navigator.userAgent, $html );
}
return browser;
}
}
module.exports = Browser;
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