resources/jquery/jquery.client.js

   1 /**
   2  * User-agent detection
   3  */
   4 ( function ( $ ) {
   5
   6         /* Private Members */
   7
   8         /**
   9          * @var {Object} profileCache Keyed by userAgent string,
  10          * value is the parsed $.client.profile object for that user agent.
  11          */
  12         var profileCache = {};
  13
  14         /* Public Methods */
  15
  16         $.client = {
  17
  18                 /**
  19                  * Get an object containing information about the client.
  20                  *
  21                  * @param {Object} nav An object with atleast a 'userAgent' and 'platform' key.
  22                  * Defaults to the global Navigator object.
  23                  * @returns {Object} The resulting client object will be in the following format:
  24                  *  {
  25                  *   'name': 'firefox',
  26                  *   'layout': 'gecko',
  27                  *   'layoutVersion': 20101026,
  28                  *   'platform': 'linux'
  29                  *   'version': '3.5.1',
  30                  *   'versionBase': '3',
  31                  *   'versionNumber': 3.5,
  32                  *  }
  33                  */
  34                 profile: function ( nav ) {
  35                         /*jshint boss: true */
  36
  37                         if ( nav === undefined ) {
  38                                 nav = window.navigator;
  39                         }
  40                         // Use the cached version if possible
  41                         if ( profileCache[nav.userAgent] === undefined ) {
  42
  43                                 var
  44                                         versionNumber,
  45
  46                                         /* Configuration */
  47
  48                                         // Name of browsers or layout engines we don't recognize
  49                                         uk = 'unknown',
  50                                         // Generic version digit
  51                                         x = 'x',
  52                                         // Strings found in user agent strings that need to be conformed
  53                                         wildUserAgents = ['Opera', 'Navigator', 'Minefield', 'KHTML', 'Chrome', 'PLAYSTATION 3', 'Iceweasel'],
  54                                         // Translations for conforming user agent strings
  55                                         userAgentTranslations = [
  56                                                 // Tons of browsers lie about being something they are not
  57                                                 [/(Firefox|MSIE|KHTML,?\slike\sGecko|Konqueror)/, ''],
  58                                                 // Chrome lives in the shadow of Safari still
  59                                                 ['Chrome Safari', 'Chrome'],
  60                                                 // KHTML is the layout engine not the browser - LIES!
  61                                                 ['KHTML', 'Konqueror'],
  62                                                 // Firefox nightly builds
  63                                                 ['Minefield', 'Firefox'],
  64                                                 // This helps keep different versions consistent
  65                                                 ['Navigator', 'Netscape'],
  66                                                 // This prevents version extraction issues, otherwise translation would happen later
  67                                                 ['PLAYSTATION 3', 'PS3']
  68                                         ],
  69                                         // Strings which precede a version number in a user agent string - combined and used as
  70                                         // match 1 in version detection
  71                                         versionPrefixes = [
  72                                                 'camino', 'chrome', 'firefox', 'iceweasel', 'netscape', 'netscape6', 'opera', 'version', 'konqueror',
  73                                                 'lynx', 'msie', 'safari', 'ps3', 'android'
  74                                         ],
  75                                         // Used as matches 2, 3 and 4 in version extraction - 3 is used as actual version number
  76                                         versionSuffix = '(\\/|\\;?\\s|)([a-z0-9\\.\\+]*?)(\\;|dev|rel|\\)|\\s|$)',
  77                                         // Names of known browsers
  78                                         names = [
  79                                                 'camino', 'chrome', 'firefox', 'iceweasel', 'netscape', 'konqueror', 'lynx', 'msie', 'opera',
  80                                                 'safari', 'ipod', 'iphone', 'blackberry', 'ps3', 'rekonq', 'android'
  81                                         ],
  82                                         // Tanslations for conforming browser names
  83                                         nameTranslations = [],
  84                                         // Names of known layout engines
  85                                         layouts = ['gecko', 'konqueror', 'msie', 'trident', 'opera', 'webkit'],
  86                                         // Translations for conforming layout names
  87                                         layoutTranslations = [ ['konqueror', 'khtml'], ['msie', 'trident'], ['opera', 'presto'] ],
  88                                         // Names of supported layout engines for version number
  89                                         layoutVersions = ['applewebkit', 'gecko', 'trident'],
  90                                         // Names of known operating systems
  91                                         platforms = ['win', 'wow64', 'mac', 'linux', 'sunos', 'solaris', 'iphone'],
  92                                         // Translations for conforming operating system names
  93                                         platformTranslations = [ ['sunos', 'solaris'], ['wow64', 'win'] ],
  94
  95                                         /* Methods */
  96
  97                                         /**
  98                                          * Performs multiple replacements on a string
  99                                          */
 100                                         translate = function ( source, translations ) {
 101                                                 var i;
 102                                                 for ( i = 0; i < translations.length; i++ ) {
 103                                                         source = source.replace( translations[i][0], translations[i][1] );
 104                                                 }
 105                                                 return source;
 106                                         },
 107
 108                                         /* Pre-processing */
 109
 110                                         ua = nav.userAgent,
 111                                         match,
 112                                         name = uk,
 113                                         layout = uk,
 114                                         layoutversion = uk,
 115                                         platform = uk,
 116                                         version = x;
 117
 118                                 if ( match = new RegExp( '(' + wildUserAgents.join( '|' ) + ')' ).exec( ua ) ) {
 119                                         // Takes a userAgent string and translates given text into something we can more easily work with
 120                                         ua = translate( ua, userAgentTranslations );
 121                                 }
 122                                 // Everything will be in lowercase from now on
 123                                 ua = ua.toLowerCase();
 124
 125                                 /* Extraction */
 126
 127                                 if ( match = new RegExp( '(' + names.join( '|' ) + ')' ).exec( ua ) ) {
 128                                         name = translate( match[1], nameTranslations );
 129                                 }
 130                                 if ( match = new RegExp( '(' + layouts.join( '|' ) + ')' ).exec( ua ) ) {
 131                                         layout = translate( match[1], layoutTranslations );
 132                                 }
 133                                 if ( match = new RegExp( '(' + layoutVersions.join( '|' ) + ')\\\/(\\d+)').exec( ua ) ) {
 134                                         layoutversion = parseInt( match[2], 10 );
 135                                 }
 136                                 if ( match = new RegExp( '(' + platforms.join( '|' ) + ')' ).exec( nav.platform.toLowerCase() ) ) {
 137                                         platform = translate( match[1], platformTranslations );
 138                                 }
 139                                 if ( match = new RegExp( '(' + versionPrefixes.join( '|' ) + ')' + versionSuffix ).exec( ua ) ) {
 140                                         version = match[3];
 141                                 }
 142
 143                                 /* Edge Cases -- did I mention about how user agent string lie? */
 144
 145                                 // Decode Safari's crazy 400+ version numbers
 146                                 if ( name === 'safari' && version > 400 ) {
 147                                         version = '2.0';
 148                                 }
 149                                 // Expose Opera 10's lies about being Opera 9.8
 150                                 if ( name === 'opera' && version >= 9.8 ) {
 151                                         match = ua.match( /\bversion\/([0-9\.]*)/ );
 152                                         if ( match && match[1] ) {
 153                                                 version = match[1];
 154                                         } else {
 155                                                 version = '10';
 156                                         }
 157                                 }
 158                                 // And Opera 15's lies about being Chrome
 159                                 if ( name === 'chrome' && ( match = ua.match( /\bopr\/([0-9\.]*)/ ) ) ) {
 160                                         if ( match[1] ) {
 161                                                 name = 'opera';
 162                                                 version = match[1];
 163                                         }
 164                                 }
 165                                 // And IE 11's lies about being not being IE
 166                                 if ( layout === 'trident' && layoutversion >= 7 && ( match = ua.match( /\brv[ :\/]([0-9\.]*)/ ) ) ) {
 167                                         if ( match[1] ) {
 168                                                 name = 'msie';
 169                                                 version = match[1];
 170                                         }
 171                                 }
 172
 173                                 versionNumber = parseFloat( version, 10 ) || 0.0;
 174
 175                                 /* Caching */
 176
 177                                 profileCache[nav.userAgent] = {
 178                                         name: name,
 179                                         layout: layout,
 180                                         layoutVersion: layoutversion,
 181                                         platform: platform,
 182                                         version: version,
 183                                         versionBase: ( version !== x ? Math.floor( versionNumber ).toString() : x ),
 184                                         versionNumber: versionNumber
 185                                 };
 186                         }
 187                         return profileCache[nav.userAgent];
 188                 },
 189
 190                 /**
 191                  * Checks the current browser against a support map object.
 192                  *
 193                  * A browser map is in the following format:
 194                  * {
 195                  *   // Multiple rules with configurable operators
 196                  *   'msie': [['>=', 7], ['!=', 9]],
 197                  *    // Match no versions
 198                  *   'iphone': false,
 199                  *    // Match any version
 200                  *   'android': null
 201                  * }
 202                  *
 203                  * It can optionally be split into ltr/rtl sections:
 204                  * {
 205                  *   'ltr': {
 206                  *     'android': null,
 207                  *     'iphone': false
 208                  *   },
 209                  *   'rtl': {
 210                  *     'android': false,
 211                  *     // rules are not inherited from ltr
 212                  *     'iphone': false
 213                  *   }
 214                  * }
 215                  *
 216                  * @param {Object} map Browser support map
 217                  * @param {Object} [profile] A client-profile object
 218                  * @param {boolean} [exactMatchOnly=false] Only return true if the browser is matched, otherwise
 219                  * returns true if the browser is not found.
 220                  *
 221                  * @returns {boolean} The current browser is in the support map
 222                  */
 223                 test: function ( map, profile, exactMatchOnly ) {
 224                         /*jshint evil: true */
 225
 226                         var conditions, dir, i, op, val;
 227                         profile = $.isPlainObject( profile ) ? profile : $.client.profile();
 228                         if ( map.ltr && map.rtl ) {
 229                                 dir = $( 'body' ).is( '.rtl' ) ? 'rtl' : 'ltr';
 230                                 map = map[dir];
 231                         }
 232                         // Check over each browser condition to determine if we are running in a compatible client
 233                         if ( typeof map !== 'object' || map[profile.name] === undefined ) {
 234                                 // Not found, return true if exactMatchOnly not set, false otherwise
 235                                 return !exactMatchOnly;
 236                         }
 237                         conditions = map[profile.name];
 238                         if ( conditions === false ) {
 239                                 // Match no versions
 240                                 return false;
 241                         }
 242                         if ( conditions === null ) {
 243                                 // Match all versions
 244                                 return true;
 245                         }
 246                         for ( i = 0; i < conditions.length; i++ ) {
 247                                 op = conditions[i][0];
 248                                 val = conditions[i][1];
 249                                 if ( typeof val === 'string' ) {
 250                                         if ( !( eval( 'profile.version' + op + '"' + val + '"' ) ) ) {
 251                                                 return false;
 252                                         }
 253                                 } else if ( typeof val === 'number' ) {
 254                                         if ( !( eval( 'profile.versionNumber' + op + val ) ) ) {
 255                                                 return false;
 256                                         }
 257                                 }
 258                         }
 259
 260                         return true;
 261                 }
 262         };
 263 }( jQuery ) );