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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 /**
      6  * @fileoverview Utilities for working with platforms.
      7  */
      8 
      9 
     10 goog.provide('cvox.PlatformFilter');
     11 goog.provide('cvox.PlatformUtil');
     12 
     13 goog.require('cvox.ChromeVox');
     14 
     15 /**
     16  * @enum
     17  */
     18 cvox.PlatformFilter = {
     19   NONE: 0,
     20   WINDOWS: 1,
     21   MAC: 2,
     22   LINUX: 4,
     23   WML: 7,
     24   CHROMEOS: 8,
     25   ANDROID: 16
     26 };
     27 
     28 
     29 /**
     30  *Checks whether the given filter matches the current platform. An undefined
     31  * filter always matches the current platform.
     32  * @param {undefined|cvox.PlatformFilter|number} filter The filter.
     33  * @return {boolean} Whether the filter matches the current platform.
     34  */
     35 cvox.PlatformUtil.matchesPlatform = function(filter) {
     36   var uA = navigator.userAgent;
     37   if (filter == undefined) {
     38     return true;
     39   } else if (uA.indexOf('Android') != -1) {
     40     return (filter & cvox.PlatformFilter.ANDROID) != 0;
     41   } else if (uA.indexOf('Win') != -1) {
     42     return (filter & cvox.PlatformFilter.WINDOWS) != 0;
     43   } else if (uA.indexOf('Mac') != -1) {
     44     return (filter & cvox.PlatformFilter.MAC) != 0;
     45   } else if (uA.indexOf('Linux') != -1) {
     46     return (filter & cvox.PlatformFilter.LINUX) != 0;
     47   } else if (uA.indexOf('CrOS') != -1) {
     48     return (filter & cvox.PlatformFilter.CHROMEOS) != 0;
     49   }
     50   return false;
     51 };
     52