resources/mediawiki/mediawiki.js

   1 /*
   2  * Core MediaWiki JavaScript Library
   3  */
   4
   5 var mw = ( function ( $, undefined ) {
   6 "use strict";
   7
   8         /* Private Members */
   9
  10         var hasOwn = Object.prototype.hasOwnProperty;
  11
  12         /* Object constructors */
  13
  14         /**
  15          * Map
  16          *
  17          * Creates an object that can be read from or written to from prototype functions
  18          * that allow both single and multiple variables at once.
  19          *
  20          * @param global boolean Whether to store the values in the global window
  21          *  object or a exclusively in the object property 'values'.
  22          * @return Map
  23          */
  24         function Map( global ) {
  25                 this.values = global === true ? window : {};
  26                 return this;
  27         }
  28
  29         Map.prototype = {
  30                 /**
  31                  * Get the value of one or multiple a keys.
  32                  *
  33                  * If called with no arguments, all values will be returned.
  34                  *
  35                  * @param selection mixed String key or array of keys to get values for.
  36                  * @param fallback mixed Value to use in case key(s) do not exist (optional).
  37                  * @return mixed If selection was a string returns the value or null,
  38                  *  If selection was an array, returns an object of key/values (value is null if not found),
  39                  *  If selection was not passed or invalid, will return the 'values' object member (be careful as
  40                  *  objects are always passed by reference in JavaScript!).
  41                  * @return Values as a string or object, null if invalid/inexistant.
  42                  */
  43                 get: function ( selection, fallback ) {
  44                         var results, i;
  45
  46                         if ( $.isArray( selection ) ) {
  47                                 selection = $.makeArray( selection );
  48                                 results = {};
  49                                 for ( i = 0; i < selection.length; i += 1 ) {
  50                                         results[selection[i]] = this.get( selection[i], fallback );
  51                                 }
  52                                 return results;
  53                         } else if ( typeof selection === 'string' ) {
  54                                 if ( this.values[selection] === undefined ) {
  55                                         if ( fallback !== undefined ) {
  56                                                 return fallback;
  57                                         }
  58                                         return null;
  59                                 }
  60                                 return this.values[selection];
  61                         }
  62                         if ( selection === undefined ) {
  63                                 return this.values;
  64                         } else {
  65                                 return null; // invalid selection key
  66                         }
  67                 },
  68
  69                 /**
  70                  * Sets one or multiple key/value pairs.
  71                  *
  72                  * @param selection {mixed} String key or array of keys to set values for.
  73                  * @param value {mixed} Value to set (optional, only in use when key is a string)
  74                  * @return {Boolean} This returns true on success, false on failure.
  75                  */
  76                 set: function ( selection, value ) {
  77                         var s;
  78
  79                         if ( $.isPlainObject( selection ) ) {
  80                                 for ( s in selection ) {
  81                                         this.values[s] = selection[s];
  82                                 }
  83                                 return true;
  84                         } else if ( typeof selection === 'string' && value !== undefined ) {
  85                                 this.values[selection] = value;
  86                                 return true;
  87                         }
  88                         return false;
  89                 },
  90
  91                 /**
  92                  * Checks if one or multiple keys exist.
  93                  *
  94                  * @param selection {mixed} String key or array of keys to check
  95                  * @return {Boolean} Existence of key(s)
  96                  */
  97                 exists: function ( selection ) {
  98                         var s;
  99
 100                         if ( $.isArray( selection ) ) {
 101                                 for ( s = 0; s < selection.length; s += 1 ) {
 102                                         if ( this.values[selection[s]] === undefined ) {
 103                                                 return false;
 104                                         }
 105                                 }
 106                                 return true;
 107                         } else {
 108                                 return this.values[selection] !== undefined;
 109                         }
 110                 }
 111         };
 112
 113         /**
 114          * Message
 115          *
 116          * Object constructor for messages,
 117          * similar to the Message class in MediaWiki PHP.
 118          *
 119          * @param map Map Instance of mw.Map
 120          * @param key String
 121          * @param parameters Array
 122          * @return Message
 123          */
 124         function Message( map, key, parameters ) {
 125                 this.format = 'plain';
 126                 this.map = map;
 127                 this.key = key;
 128                 this.parameters = parameters === undefined ? [] : $.makeArray( parameters );
 129                 return this;
 130         }
 131
 132         Message.prototype = {
 133                 /**
 134                  * Appends (does not replace) parameters for replacement to the .parameters property.
 135                  *
 136                  * @param parameters Array
 137                  * @return Message
 138                  */
 139                 params: function ( parameters ) {
 140                         var i;
 141                         for ( i = 0; i < parameters.length; i += 1 ) {
 142                                 this.parameters.push( parameters[i] );
 143                         }
 144                         return this;
 145                 },
 146
 147                 /**
 148                  * Converts message object to it's string form based on the state of format.
 149                  *
 150                  * @return string Message as a string in the current form or <key> if key does not exist.
 151                  */
 152                 toString: function() {
 153                         if ( !this.map.exists( this.key ) ) {
 154                                 // Use <key> as text if key does not exist
 155                                 if ( this.format !== 'plain' ) {
 156                                         // format 'escape' and 'parse' need to have the brackets and key html escaped
 157                                         return mw.html.escape( '<' + this.key + '>' );
 158                                 }
 159                                 return '<' + this.key + '>';
 160                         }
 161                         var     text = this.map.get( this.key ),
 162                                 parameters = this.parameters;
 163
 164                         text = text.replace( /\$(\d+)/g, function ( str, match ) {
 165                                 var index = parseInt( match, 10 ) - 1;
 166                                 return parameters[index] !== undefined ? parameters[index] : '$' + match;
 167                         } );
 168
 169                         if ( this.format === 'plain' ) {
 170                                 return text;
 171                         }
 172                         if ( this.format === 'escaped' ) {
 173                                 // According to Message.php this needs {{-transformation, which is
 174                                 // still todo
 175                                 return mw.html.escape( text );
 176                         }
 177
 178                         /* This should be fixed up when we have a parser
 179                         if ( this.format === 'parse' && 'language' in mw ) {
 180                                 text = mw.language.parse( text );
 181                         }
 182                         */
 183                         return text;
 184                 },
 185
 186                 /**
 187                  * Changes format to parse and converts message to string
 188                  *
 189                  * @return {string} String form of parsed message
 190                  */
 191                 parse: function() {
 192                         this.format = 'parse';
 193                         return this.toString();
 194                 },
 195
 196                 /**
 197                  * Changes format to plain and converts message to string
 198                  *
 199                  * @return {string} String form of plain message
 200                  */
 201                 plain: function() {
 202                         this.format = 'plain';
 203                         return this.toString();
 204                 },
 205
 206                 /**
 207                  * Changes the format to html escaped and converts message to string
 208                  *
 209                  * @return {string} String form of html escaped message
 210                  */
 211                 escaped: function() {
 212                         this.format = 'escaped';
 213                         return this.toString();
 214                 },
 215
 216                 /**
 217                  * Checks if message exists
 218                  *
 219                  * @return {string} String form of parsed message
 220                  */
 221                 exists: function() {
 222                         return this.map.exists( this.key );
 223                 }
 224         };
 225
 226         return {
 227                 /* Public Members */
 228
 229                 /**
 230                  * Dummy function which in debug mode can be replaced with a function that
 231                  * emulates console.log in console-less environments.
 232                  */
 233                 log: function() { },
 234
 235                 /**
 236                  * @var constructor Make the Map constructor publicly available.
 237                  */
 238                 Map: Map,
 239
 240                 /**
 241                  * List of configuration values
 242                  *
 243                  * Dummy placeholder. Initiated in startUp module as a new instance of mw.Map().
 244                  * If $wgLegacyJavaScriptGlobals is true, this Map will have its values
 245                  * in the global window object.
 246                  */
 247                 config: null,
 248
 249                 /**
 250                  * @var object
 251                  *
 252                  * Empty object that plugins can be installed in.
 253                  */
 254                 libs: {},
 255
 256                 /* Extension points */
 257
 258                 legacy: {},
 259
 260                 /**
 261                  * Localization system
 262                  */
 263                 messages: new Map(),
 264
 265                 /* Public Methods */
 266
 267                 /**
 268                  * Gets a message object, similar to wfMessage()
 269                  *
 270                  * @param key string Key of message to get
 271                  * @param parameter_1 mixed First argument in a list of variadic arguments,
 272                  *  each a parameter for $N replacement in messages.
 273                  * @return Message
 274                  */
 275                 message: function ( key, parameter_1 /* [, parameter_2] */ ) {
 276                         var parameters;
 277                         // Support variadic arguments
 278                         if ( parameter_1 !== undefined ) {
 279                                 parameters = $.makeArray( arguments );
 280                                 parameters.shift();
 281                         } else {
 282                                 parameters = [];
 283                         }
 284                         return new Message( mw.messages, key, parameters );
 285                 },
 286
 287                 /**
 288                  * Gets a message string, similar to wfMsg()
 289                  *
 290                  * @param key string Key of message to get
 291                  * @param parameters mixed First argument in a list of variadic arguments,
 292                  *  each a parameter for $N replacement in messages.
 293                  * @return String.
 294                  */
 295                 msg: function ( key, parameters ) {
 296                         return mw.message.apply( mw.message, arguments ).toString();
 297                 },
 298
 299                 /**
 300                  * Client-side module loader which integrates with the MediaWiki ResourceLoader
 301                  */
 302                 loader: ( function() {
 303
 304                         /* Private Members */
 305
 306                         /**
 307                          * Mapping of registered modules
 308                          *
 309                          * The jquery module is pre-registered, because it must have already
 310                          * been provided for this object to have been built, and in debug mode
 311                          * jquery would have been provided through a unique loader request,
 312                          * making it impossible to hold back registration of jquery until after
 313                          * mediawiki.
 314                          *
 315                          * For exact details on support for script, style and messages, look at
 316                          * mw.loader.implement.
 317                          *
 318                          * Format:
 319                          *      {
 320                          *              'moduleName': {
 321                          *                      'version': ############## (unix timestamp),
 322                          *                      'dependencies': ['required.foo', 'bar.also', ...], (or) function() {}
 323                          *                      'group': 'somegroup', (or) null,
 324                          *                      'source': 'local', 'someforeignwiki', (or) null
 325                          *                      'state': 'registered', 'loading', 'loaded', 'ready', 'error' or 'missing'
 326                          *                      'script': ...,
 327                          *                      'style': ...,
 328                          *                      'messages': { 'key': 'value' },
 329                          *              }
 330                          *      }
 331                          */
 332                         var     registry = {},
 333                                 /**
 334                                  * Mapping of sources, keyed by source-id, values are objects.
 335                                  * Format:
 336                                  *      {
 337                                  *              'sourceId': {
 338                                  *                      'loadScript': 'http://foo.bar/w/load.php'
 339                                  *              }
 340                                  *      }
 341                                  */
 342                                 sources = {},
 343                                 // List of modules which will be loaded as when ready
 344                                 batch = [],
 345                                 // List of modules to be loaded
 346                                 queue = [],
 347                                 // List of callback functions waiting for modules to be ready to be called
 348                                 jobs = [],
 349                                 // Flag inidicating that document ready has occured
 350                                 ready = false,
 351                                 // Selector cache for the marker element. Use getMarker() to get/use the marker!
 352                                 $marker = null;
 353
 354                         /* Cache document ready status */
 355
 356                         $(document).ready( function () {
 357                                 ready = true;
 358                         } );
 359
 360                         /* Private methods */
 361
 362                         function getMarker(){
 363                                 // Cached ?
 364                                 if ( $marker ) {
 365                                         return $marker;
 366                                 } else {
 367                                         $marker = $( 'meta[name="ResourceLoaderDynamicStyles"]' );
 368                                         if ( $marker.length ) {
 369                                                 return $marker;
 370                                         }
 371                                         mw.log( 'getMarker> No <meta name="ResourceLoaderDynamicStyles"> found, inserting dynamically.' );
 372                                         $marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' );
 373                                         return $marker;
 374                                 }
 375                         }
 376
 377                         function compare( a, b ) {
 378                                 var i;
 379                                 if ( a.length !== b.length ) {
 380                                         return false;
 381                                 }
 382                                 for ( i = 0; i < b.length; i += 1 ) {
 383                                         if ( $.isArray( a[i] ) ) {
 384                                                 if ( !compare( a[i], b[i] ) ) {
 385                                                         return false;
 386                                                 }
 387                                         }
 388                                         if ( a[i] !== b[i] ) {
 389                                                 return false;
 390                                         }
 391                                 }
 392                                 return true;
 393                         }
 394
 395                         /**
 396                          * Generates an ISO8601 "basic" string from a UNIX timestamp
 397                          */
 398                         function formatVersionNumber( timestamp ) {
 399                                 var     pad = function ( a, b, c ) {
 400                                                 return [a < 10 ? '0' + a : a, b < 10 ? '0' + b : b, c < 10 ? '0' + c : c].join( '' );
 401                                         },
 402                                         d = new Date();
 403                                 d.setTime( timestamp * 1000 );
 404                                 return [
 405                                         pad( d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate() ), 'T',
 406                                         pad( d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds() ), 'Z'
 407                                 ].join( '' );
 408                         }
 409
 410                         /**
 411                          * Recursively resolves dependencies and detects circular references
 412                          */
 413                         function recurse( module, resolved, unresolved ) {
 414                                 var n, deps, len;
 415
 416                                 if ( registry[module] === undefined ) {
 417                                         throw new Error( 'Unknown dependency: ' + module );
 418                                 }
 419                                 // Resolves dynamic loader function and replaces it with its own results
 420                                 if ( $.isFunction( registry[module].dependencies ) ) {
 421                                         registry[module].dependencies = registry[module].dependencies();
 422                                         // Ensures the module's dependencies are always in an array
 423                                         if ( typeof registry[module].dependencies !== 'object' ) {
 424                                                 registry[module].dependencies = [registry[module].dependencies];
 425                                         }
 426                                 }
 427                                 // Tracks down dependencies
 428                                 deps = registry[module].dependencies;
 429                                 len = deps.length;
 430                                 for ( n = 0; n < len; n += 1 ) {
 431                                         if ( $.inArray( deps[n], resolved ) === -1 ) {
 432                                                 if ( $.inArray( deps[n], unresolved ) !== -1 ) {
 433                                                         throw new Error(
 434                                                                 'Circular reference detected: ' + module +
 435                                                                 ' -> ' + deps[n]
 436                                                         );
 437                                                 }
 438
 439                                                 // Add to unresolved
 440                                                 unresolved[unresolved.length] = module;
 441                                                 recurse( deps[n], resolved, unresolved );
 442                                                 // module is at the end of unresolved
 443                                                 unresolved.pop();
 444                                         }
 445                                 }
 446                                 resolved[resolved.length] = module;
 447                         }
 448
 449                         /**
 450                          * Gets a list of module names that a module depends on in their proper dependency order
 451                          *
 452                          * @param module string module name or array of string module names
 453                          * @return list of dependencies, including 'module'.
 454                          * @throws Error if circular reference is detected
 455                          */
 456                         function resolve( module ) {
 457                                 var modules, m, deps, n, resolved;
 458
 459                                 // Allow calling with an array of module names
 460                                 if ( $.isArray( module ) ) {
 461                                         modules = [];
 462                                         for ( m = 0; m < module.length; m += 1 ) {
 463                                                 deps = resolve( module[m] );
 464                                                 for ( n = 0; n < deps.length; n += 1 ) {
 465                                                         modules[modules.length] = deps[n];
 466                                                 }
 467                                         }
 468                                         return modules;
 469                                 } else if ( typeof module === 'string' ) {
 470                                         resolved = [];
 471                                         recurse( module, resolved, [] );
 472                                         return resolved;
 473                                 }
 474                                 throw new Error( 'Invalid module argument: ' + module );
 475                         }
 476
 477                         /**
 478                          * Narrows a list of module names down to those matching a specific
 479                          * state (see comment on top of this scope for a list of valid states).
 480                          * One can also filter for 'unregistered', which will return the
 481                          * modules names that don't have a registry entry.
 482                          *
 483                          * @param states string or array of strings of module states to filter by
 484                          * @param modules array list of module names to filter (optional, by default the entire
 485                          * registry is used)
 486                          * @return array list of filtered module names
 487                          */
 488                         function filter( states, modules ) {
 489                                 var list, module, s, m;
 490
 491                                 // Allow states to be given as a string
 492                                 if ( typeof states === 'string' ) {
 493                                         states = [states];
 494                                 }
 495                                 // If called without a list of modules, build and use a list of all modules
 496                                 list = [];
 497                                 if ( modules === undefined ) {
 498                                         modules = [];
 499                                         for ( module in registry ) {
 500                                                 modules[modules.length] = module;
 501                                         }
 502                                 }
 503                                 // Build a list of modules which are in one of the specified states
 504                                 for ( s = 0; s < states.length; s += 1 ) {
 505                                         for ( m = 0; m < modules.length; m += 1 ) {
 506                                                 if ( registry[modules[m]] === undefined ) {
 507                                                         // Module does not exist
 508                                                         if ( states[s] === 'unregistered' ) {
 509                                                                 // OK, undefined
 510                                                                 list[list.length] = modules[m];
 511                                                         }
 512                                                 } else {
 513                                                         // Module exists, check state
 514                                                         if ( registry[modules[m]].state === states[s] ) {
 515                                                                 // OK, correct state
 516                                                                 list[list.length] = modules[m];
 517                                                         }
 518                                                 }
 519                                         }
 520                                 }
 521                                 return list;
 522                         }
 523
 524                         /**
 525                          * Automatically executes jobs and modules which are pending with satistifed dependencies.
 526                          *
 527                          * This is used when dependencies are satisfied, such as when a module is executed.
 528                          */
 529                         function handlePending( module ) {
 530                                 var j, r;
 531
 532                                 try {
 533                                         // Run jobs who's dependencies have just been met
 534                                         for ( j = 0; j < jobs.length; j += 1 ) {
 535                                                 if ( compare(
 536                                                         filter( 'ready', jobs[j].dependencies ),
 537                                                         jobs[j].dependencies ) )
 538                                                 {
 539                                                         if ( $.isFunction( jobs[j].ready ) ) {
 540                                                                 jobs[j].ready();
 541                                                         }
 542                                                         jobs.splice( j, 1 );
 543                                                         j -= 1;
 544                                                 }
 545                                         }
 546                                         // Execute modules who's dependencies have just been met
 547                                         for ( r in registry ) {
 548                                                 if ( registry[r].state === 'loaded' ) {
 549                                                         if ( compare(
 550                                                                 filter( ['ready'], registry[r].dependencies ),
 551                                                                 registry[r].dependencies ) )
 552                                                         {
 553                                                                 execute( r );
 554                                                         }
 555                                                 }
 556                                         }
 557                                 } catch ( e ) {
 558                                         // Run error callbacks of jobs affected by this condition
 559                                         for ( j = 0; j < jobs.length; j += 1 ) {
 560                                                 if ( $.inArray( module, jobs[j].dependencies ) !== -1 ) {
 561                                                         if ( $.isFunction( jobs[j].error ) ) {
 562                                                                 jobs[j].error( e, module );
 563                                                         }
 564                                                         jobs.splice( j, 1 );
 565                                                         j -= 1;
 566                                                 }
 567                                         }
 568                                 }
 569                         }
 570
 571                         /**
 572                          * Adds a script tag to the body, either using document.write or low-level DOM manipulation,
 573                          * depending on whether document-ready has occured yet.
 574                          *
 575                          * @param src String: URL to script, will be used as the src attribute in the script tag
 576                          * @param callback Function: Optional callback which will be run when the script is done
 577                          */
 578                         function addScript( src, callback ) {
 579                                 var done = false, script;
 580                                 if ( ready ) {
 581                                         // jQuery's getScript method is NOT better than doing this the old-fashioned way
 582                                         // because jQuery will eval the script's code, and errors will not have sane
 583                                         // line numbers.
 584                                         script = document.createElement( 'script' );
 585                                         script.setAttribute( 'src', src );
 586                                         script.setAttribute( 'type', 'text/javascript' );
 587                                         if ( $.isFunction( callback ) ) {
 588                                                 // Attach handlers for all browsers (based on jQuery.ajax)
 589                                                 script.onload = script.onreadystatechange = function() {
 590
 591                                                         if (
 592                                                                 !done
 593                                                                 && (
 594                                                                         !script.readyState
 595                                                                         || /loaded|complete/.test( script.readyState )
 596                                                                 )
 597                                                         ) {
 598
 599                                                                 done = true;
 600
 601                                                                 // Handle memory leak in IE
 602                                                                 script.onload = script.onreadystatechange = null;
 603
 604                                                                 callback();
 605
 606                                                                 if ( script.parentNode ) {
 607                                                                         script.parentNode.removeChild( script );
 608                                                                 }
 609
 610                                                                 // Dereference the script
 611                                                                 script = undefined;
 612                                                         }
 613                                                 };
 614                                         }
 615                                         document.body.appendChild( script );
 616                                 } else {
 617                                         document.write( mw.html.element(
 618                                                 'script', { 'type': 'text/javascript', 'src': src }, ''
 619                                         ) );
 620                                         if ( $.isFunction( callback ) ) {
 621                                                 // Document.write is synchronous, so this is called when it's done
 622                                                 callback();
 623                                         }
 624                                 }
 625                         }
 626
 627                         /**
 628                          * Executes a loaded module, making it ready to use
 629                          *
 630                          * @param module string module name to execute
 631                          */
 632                         function execute( module, callback ) {
 633                                 var style, media, i, script, markModuleReady, nestedAddScript;
 634
 635                                 if ( registry[module] === undefined ) {
 636                                         throw new Error( 'Module has not been registered yet: ' + module );
 637                                 } else if ( registry[module].state === 'registered' ) {
 638                                         throw new Error( 'Module has not been requested from the server yet: ' + module );
 639                                 } else if ( registry[module].state === 'loading' ) {
 640                                         throw new Error( 'Module has not completed loading yet: ' + module );
 641                                 } else if ( registry[module].state === 'ready' ) {
 642                                         throw new Error( 'Module has already been loaded: ' + module );
 643                                 }
 644
 645                                 // Add styles
 646                                 if ( $.isPlainObject( registry[module].style ) ) {
 647                                         for ( media in registry[module].style ) {
 648                                                 style = registry[module].style[media];
 649                                                 if ( $.isArray( style ) ) {
 650                                                         for ( i = 0; i < style.length; i += 1 ) {
 651                                                                 getMarker().before( mw.html.element( 'link', {
 652                                                                         'type': 'text/css',
 653                                                                         'media': media,
 654                                                                         'rel': 'stylesheet',
 655                                                                         'href': style[i]
 656                                                                 } ) );
 657                                                         }
 658                                                 } else if ( typeof style === 'string' ) {
 659                                                         getMarker().before( mw.html.element( 'style', {
 660                                                                 'type': 'text/css',
 661                                                                 'media': media
 662                                                         }, new mw.html.Cdata( style ) ) );
 663                                                 }
 664                                         }
 665                                 }
 666                                 // Add localizations to message system
 667                                 if ( $.isPlainObject( registry[module].messages ) ) {
 668                                         mw.messages.set( registry[module].messages );
 669                                 }
 670                                 // Execute script
 671                                 try {
 672                                         script = registry[module].script;
 673                                         markModuleReady = function() {
 674                                                 registry[module].state = 'ready';
 675                                                 handlePending( module );
 676                                                 if ( $.isFunction( callback ) ) {
 677                                                         callback();
 678                                                 }
 679                                         };
 680                                         nestedAddScript = function ( arr, callback, i ) {
 681                                                 // Recursively call addScript() in its own callback
 682                                                 // for each element of arr.
 683                                                 if ( i >= arr.length ) {
 684                                                         // We're at the end of the array
 685                                                         callback();
 686                                                         return;
 687                                                 }
 688
 689                                                 addScript( arr[i], function() {
 690                                                         nestedAddScript( arr, callback, i + 1 );
 691                                                 } );
 692                                         };
 693
 694                                         if ( $.isArray( script ) ) {
 695                                                 registry[module].state = 'loading';
 696                                                 nestedAddScript( script, markModuleReady, 0 );
 697                                         } else if ( $.isFunction( script ) ) {
 698                                                 script( $ );
 699                                                 markModuleReady();
 700                                         }
 701                                 } catch ( e ) {
 702                                         // This needs to NOT use mw.log because these errors are common in production mode
 703                                         // and not in debug mode, such as when a symbol that should be global isn't exported
 704                                         if ( window.console && typeof window.console.log === 'function' ) {
 705                                                 console.log( 'mw.loader::execute> Exception thrown by ' + module + ': ' + e.message );
 706                                         }
 707                                         registry[module].state = 'error';
 708                                         throw e;
 709                                 }
 710                         }
 711
 712                         /**
 713                          * Adds a dependencies to the queue with optional callbacks to be run
 714                          * when the dependencies are ready or fail
 715                          *
 716                          * @param dependencies string module name or array of string module names
 717                          * @param ready function callback to execute when all dependencies are ready
 718                          * @param error function callback to execute when any dependency fails
 719                          */
 720                         function request( dependencies, ready, error ) {
 721                                 var regItemDeps, regItemDepLen, n;
 722
 723                                 // Allow calling by single module name
 724                                 if ( typeof dependencies === 'string' ) {
 725                                         dependencies = [dependencies];
 726                                         if ( registry[dependencies[0]] !== undefined ) {
 727                                                 // Cache repetitively accessed deep level object member
 728                                                 regItemDeps = registry[dependencies[0]].dependencies;
 729                                                 // Cache to avoid looped access to length property
 730                                                 regItemDepLen = regItemDeps.length;
 731                                                 for ( n = 0; n < regItemDepLen; n += 1 ) {
 732                                                         dependencies[dependencies.length] = regItemDeps[n];
 733                                                 }
 734                                         }
 735                                 }
 736                                 // Add ready and error callbacks if they were given
 737                                 if ( arguments.length > 1 ) {
 738                                         jobs[jobs.length] = {
 739                                                 'dependencies': filter(
 740                                                         ['registered', 'loading', 'loaded'],
 741                                                         dependencies
 742                                                 ),
 743                                                 'ready': ready,
 744                                                 'error': error
 745                                         };
 746                                 }
 747                                 // Queue up any dependencies that are registered
 748                                 dependencies = filter( ['registered'], dependencies );
 749                                 for ( n = 0; n < dependencies.length; n += 1 ) {
 750                                         if ( $.inArray( dependencies[n], queue ) === -1 ) {
 751                                                 queue[queue.length] = dependencies[n];
 752                                         }
 753                                 }
 754                                 // Work the queue
 755                                 mw.loader.work();
 756                         }
 757
 758                         function sortQuery(o) {
 759                                 var sorted = {}, key, a = [];
 760                                 for ( key in o ) {
 761                                         if ( hasOwn.call( o, key ) ) {
 762                                                 a.push( key );
 763                                         }
 764                                 }
 765                                 a.sort();
 766                                 for ( key = 0; key < a.length; key += 1 ) {
 767                                         sorted[a[key]] = o[a[key]];
 768                                 }
 769                                 return sorted;
 770                         }
 771
 772                         /**
 773                          * Converts a module map of the form { foo: [ 'bar', 'baz' ], bar: [ 'baz, 'quux' ] }
 774                          * to a query string of the form foo.bar,baz|bar.baz,quux
 775                          */
 776                         function buildModulesString( moduleMap ) {
 777                                 var arr = [], p, prefix;
 778                                 for ( prefix in moduleMap ) {
 779                                         p = prefix === '' ? '' : prefix + '.';
 780                                         arr.push( p + moduleMap[prefix].join( ',' ) );
 781                                 }
 782                                 return arr.join( '|' );
 783                         }
 784
 785                         /**
 786                          * Asynchronously append a script tag to the end of the body
 787                          * that invokes load.php
 788                          * @param moduleMap {Object}: Module map, see buildModulesString()
 789                          * @param currReqBase {Object}: Object with other parameters (other than 'modules') to use in the request
 790                          * @param sourceLoadScript {String}: URL of load.php
 791                          */
 792                         function doRequest( moduleMap, currReqBase, sourceLoadScript ) {
 793                                 var request = $.extend(
 794                                         { 'modules': buildModulesString( moduleMap ) },
 795                                         currReqBase
 796                                 );
 797                                 request = sortQuery( request );
 798                                 // Asynchronously append a script tag to the end of the body
 799                                 // Append &* to avoid triggering the IE6 extension check
 800                                 addScript( sourceLoadScript + '?' + $.param( request ) + '&*' );
 801                         }
 802
 803                         /* Public Methods */
 804                         return {
 805                                 /**
 806                                  * Requests dependencies from server, loading and executing when things when ready.
 807                                  */
 808                                 work: function () {
 809                                         var     reqBase, splits, maxQueryLength, q, b, bSource, bGroup, bSourceGroup,
 810                                                 source, group, g, i, modules, maxVersion, sourceLoadScript,
 811                                                 currReqBase, currReqBaseLength, moduleMap, l,
 812                                                 lastDotIndex, prefix, suffix, bytesAdded;
 813
 814                                         // Build a list of request parameters common to all requests.
 815                                         reqBase = {
 816                                                 skin: mw.config.get( 'skin' ),
 817                                                 lang: mw.config.get( 'wgUserLanguage' ),
 818                                                 debug: mw.config.get( 'debug' )
 819                                         };
 820                                         // Split module batch by source and by group.
 821                                         splits = {};
 822                                         maxQueryLength = mw.config.get( 'wgResourceLoaderMaxQueryLength', -1 );
 823
 824                                         // Appends a list of modules from the queue to the batch
 825                                         for ( q = 0; q < queue.length; q += 1 ) {
 826                                                 // Only request modules which are registered
 827                                                 if ( registry[queue[q]] !== undefined && registry[queue[q]].state === 'registered' ) {
 828                                                         // Prevent duplicate entries
 829                                                         if ( $.inArray( queue[q], batch ) === -1 ) {
 830                                                                 batch[batch.length] = queue[q];
 831                                                                 // Mark registered modules as loading
 832                                                                 registry[queue[q]].state = 'loading';
 833                                                         }
 834                                                 }
 835                                         }
 836                                         // Early exit if there's nothing to load...
 837                                         if ( !batch.length ) {
 838                                                 return;
 839                                         }
 840
 841                                         // The queue has been processed into the batch, clear up the queue.
 842                                         queue = [];
 843
 844                                         // Always order modules alphabetically to help reduce cache
 845                                         // misses for otherwise identical content.
 846                                         batch.sort();
 847
 848                                         // Split batch by source and by group.
 849                                         for ( b = 0; b < batch.length; b += 1 ) {
 850                                                 bSource = registry[batch[b]].source;
 851                                                 bGroup = registry[batch[b]].group;
 852                                                 if ( splits[bSource] === undefined ) {
 853                                                         splits[bSource] = {};
 854                                                 }
 855                                                 if ( splits[bSource][bGroup] === undefined ) {
 856                                                         splits[bSource][bGroup] = [];
 857                                                 }
 858                                                 bSourceGroup = splits[bSource][bGroup];
 859                                                 bSourceGroup[bSourceGroup.length] = batch[b];
 860                                         }
 861
 862                                         // Clear the batch - this MUST happen before we append any
 863                                         // script elements to the body or it's possible that a script
 864                                         // will be locally cached, instantly load, and work the batch
 865                                         // again, all before we've cleared it causing each request to
 866                                         // include modules which are already loaded.
 867                                         batch = [];
 868
 869                                         for ( source in splits ) {
 870
 871                                                 sourceLoadScript = sources[source].loadScript;
 872
 873                                                 for ( group in splits[source] ) {
 874
 875                                                         // Cache access to currently selected list of
 876                                                         // modules for this group from this source.
 877                                                         modules = splits[source][group];
 878
 879                                                         // Calculate the highest timestamp
 880                                                         maxVersion = 0;
 881                                                         for ( g = 0; g < modules.length; g += 1 ) {
 882                                                                 if ( registry[modules[g]].version > maxVersion ) {
 883                                                                         maxVersion = registry[modules[g]].version;
 884                                                                 }
 885                                                         }
 886
 887                                                         currReqBase = $.extend( { 'version': formatVersionNumber( maxVersion ) }, reqBase );
 888                                                         currReqBaseLength = $.param( currReqBase ).length;
 889                                                         moduleMap = {};
 890                                                         // We may need to split up the request to honor the query string length limit,
 891                                                         // so build it piece by piece.
 892                                                         l = currReqBaseLength + 9; // '&modules='.length == 9
 893
 894                                                         moduleMap = {}; // { prefix: [ suffixes ] }
 895
 896                                                         for ( i = 0; i < modules.length; i += 1 ) {
 897                                                                 // Determine how many bytes this module would add to the query string
 898                                                                 lastDotIndex = modules[i].lastIndexOf( '.' );
 899                                                                 // Note that these substr() calls work even if lastDotIndex == -1
 900                                                                 prefix = modules[i].substr( 0, lastDotIndex );
 901                                                                 suffix = modules[i].substr( lastDotIndex + 1 );
 902                                                                 bytesAdded = moduleMap[prefix] !== undefined
 903                                                                         ? suffix.length + 3 // '%2C'.length == 3
 904                                                                         : modules[i].length + 3; // '%7C'.length == 3
 905
 906                                                                 // If the request would become too long, create a new one,
 907                                                                 // but don't create empty requests
 908                                                                 if ( maxQueryLength > 0 && !$.isEmptyObject( moduleMap ) && l + bytesAdded > maxQueryLength ) {
 909                                                                         // This request would become too long, create a new one
 910                                                                         // and fire off the old one
 911                                                                         doRequest( moduleMap, currReqBase, sourceLoadScript );
 912                                                                         moduleMap = {};
 913                                                                         l = currReqBaseLength + 9;
 914                                                                 }
 915                                                                 if ( moduleMap[prefix] === undefined ) {
 916                                                                         moduleMap[prefix] = [];
 917                                                                 }
 918                                                                 moduleMap[prefix].push( suffix );
 919                                                                 l += bytesAdded;
 920                                                         }
 921                                                         // If there's anything left in moduleMap, request that too
 922                                                         if ( !$.isEmptyObject( moduleMap ) ) {
 923                                                                 doRequest( moduleMap, currReqBase, sourceLoadScript );
 924                                                         }
 925                                                 }
 926                                         }
 927                                 },
 928
 929                                 /**
 930                                  * Register a source.
 931                                  *
 932                                  * @param id {String}: Short lowercase a-Z string representing a source, only used internally.
 933                                  * @param props {Object}: Object containing only the loadScript property which is a url to
 934                                  * the load.php location of the source.
 935                                  * @return {Boolean}
 936                                  */
 937                                 addSource: function ( id, props ) {
 938                                         var source;
 939                                         // Allow multiple additions
 940                                         if ( typeof id === 'object' ) {
 941                                                 for ( source in id ) {
 942                                                         mw.loader.addSource( source, id[source] );
 943                                                 }
 944                                                 return true;
 945                                         }
 946
 947                                         if ( sources[id] !== undefined ) {
 948                                                 throw new Error( 'source already registered: ' + id );
 949                                         }
 950
 951                                         sources[id] = props;
 952
 953                                         return true;
 954                                 },
 955
 956                                 /**
 957                                  * Registers a module, letting the system know about it and its
 958                                  * properties. Startup modules contain calls to this function.
 959                                  *
 960                                  * @param module {String}: Module name
 961                                  * @param version {Number}: Module version number as a timestamp (falls backs to 0)
 962                                  * @param dependencies {String|Array|Function}: One string or array of strings of module
 963                                  *  names on which this module depends, or a function that returns that array.
 964                                  * @param group {String}: Group which the module is in (optional, defaults to null)
 965                                  * @param source {String}: Name of the source. Defaults to local.
 966                                  */
 967                                 register: function ( module, version, dependencies, group, source ) {
 968                                         var m;
 969                                         // Allow multiple registration
 970                                         if ( typeof module === 'object' ) {
 971                                                 for ( m = 0; m < module.length; m += 1 ) {
 972                                                         // module is an array of module names
 973                                                         if ( typeof module[m] === 'string' ) {
 974                                                                 mw.loader.register( module[m] );
 975                                                         // module is an array of arrays
 976                                                         } else if ( typeof module[m] === 'object' ) {
 977                                                                 mw.loader.register.apply( mw.loader, module[m] );
 978                                                         }
 979                                                 }
 980                                                 return;
 981                                         }
 982                                         // Validate input
 983                                         if ( typeof module !== 'string' ) {
 984                                                 throw new Error( 'module must be a string, not a ' + typeof module );
 985                                         }
 986                                         if ( registry[module] !== undefined ) {
 987                                                 throw new Error( 'module already registered: ' + module );
 988                                         }
 989                                         // List the module as registered
 990                                         registry[module] = {
 991                                                 'version': version !== undefined ? parseInt( version, 10 ) : 0,
 992                                                 'dependencies': [],
 993                                                 'group': typeof group === 'string' ? group : null,
 994                                                 'source': typeof source === 'string' ? source: 'local',
 995                                                 'state': 'registered'
 996                                         };
 997                                         if ( typeof dependencies === 'string' ) {
 998                                                 // Allow dependencies to be given as a single module name
 999                                                 registry[module].dependencies = [dependencies];
1000                                         } else if ( typeof dependencies === 'object' || $.isFunction( dependencies ) ) {
1001                                                 // Allow dependencies to be given as an array of module names
1002                                                 // or a function which returns an array
1003                                                 registry[module].dependencies = dependencies;
1004                                         }
1005                                 },
1006
1007                                 /**
1008                                  * Implements a module, giving the system a course of action to take
1009                                  * upon loading. Results of a request for one or more modules contain
1010                                  * calls to this function.
1011                                  *
1012                                  * All arguments are required.
1013                                  *
1014                                  * @param module String: Name of module
1015                                  * @param script Mixed: Function of module code or String of URL to be used as the src
1016                                  *  attribute when adding a script element to the body
1017                                  * @param style Object: Object of CSS strings keyed by media-type or Object of lists of URLs
1018                                  *  keyed by media-type
1019                                  * @param msgs Object: List of key/value pairs to be passed through mw.messages.set
1020                                  */
1021                                 implement: function ( module, script, style, msgs ) {
1022                                         // Validate input
1023                                         if ( typeof module !== 'string' ) {
1024                                                 throw new Error( 'module must be a string, not a ' + typeof module );
1025                                         }
1026                                         if ( !$.isFunction( script ) && !$.isArray( script ) ) {
1027                                                 throw new Error( 'script must be a function or an array, not a ' + typeof script );
1028                                         }
1029                                         if ( !$.isPlainObject( style ) ) {
1030                                                 throw new Error( 'style must be an object, not a ' + typeof style );
1031                                         }
1032                                         if ( !$.isPlainObject( msgs ) ) {
1033                                                 throw new Error( 'msgs must be an object, not a ' + typeof msgs );
1034                                         }
1035                                         // Automatically register module
1036                                         if ( registry[module] === undefined ) {
1037                                                 mw.loader.register( module );
1038                                         }
1039                                         // Check for duplicate implementation
1040                                         if ( registry[module] !== undefined && registry[module].script !== undefined ) {
1041                                                 throw new Error( 'module already implemented: ' + module );
1042                                         }
1043                                         // Mark module as loaded
1044                                         registry[module].state = 'loaded';
1045                                         // Attach components
1046                                         registry[module].script = script;
1047                                         registry[module].style = style;
1048                                         registry[module].messages = msgs;
1049                                         // Execute or queue callback
1050                                         if ( compare(
1051                                                 filter( ['ready'], registry[module].dependencies ),
1052                                                 registry[module].dependencies ) )
1053                                         {
1054                                                 execute( module );
1055                                         }
1056                                 },
1057
1058                                 /**
1059                                  * Executes a function as soon as one or more required modules are ready
1060                                  *
1061                                  * @param dependencies {String|Array} Module name or array of modules names the callback
1062                                  *  dependends on to be ready before executing
1063                                  * @param ready {Function} callback to execute when all dependencies are ready (optional)
1064                                  * @param error {Function} callback to execute when if dependencies have a errors (optional)
1065                                  */
1066                                 using: function ( dependencies, ready, error ) {
1067                                         var tod = typeof dependencies;
1068                                         // Validate input
1069                                         if ( tod !== 'object' && tod !== 'string' ) {
1070                                                 throw new Error( 'dependencies must be a string or an array, not a ' + tod );
1071                                         }
1072                                         // Allow calling with a single dependency as a string
1073                                         if ( tod === 'string' ) {
1074                                                 dependencies = [dependencies];
1075                                         }
1076                                         // Resolve entire dependency map
1077                                         dependencies = resolve( dependencies );
1078                                         // If all dependencies are met, execute ready immediately
1079                                         if ( compare( filter( ['ready'], dependencies ), dependencies ) ) {
1080                                                 if ( $.isFunction( ready ) ) {
1081                                                         ready();
1082                                                 }
1083                                         }
1084                                         // If any dependencies have errors execute error immediately
1085                                         else if ( filter( ['error'], dependencies ).length ) {
1086                                                 if ( $.isFunction( error ) ) {
1087                                                         error( new Error( 'one or more dependencies have state "error"' ),
1088                                                                 dependencies );
1089                                                 }
1090                                         }
1091                                         // Since some dependencies are not yet ready, queue up a request
1092                                         else {
1093                                                 request( dependencies, ready, error );
1094                                         }
1095                                 },
1096
1097                                 /**
1098                                  * Loads an external script or one or more modules for future use
1099                                  *
1100                                  * @param modules {mixed} Either the name of a module, array of modules,
1101                                  *  or a URL of an external script or style
1102                                  * @param type {String} mime-type to use if calling with a URL of an
1103                                  *  external script or style; acceptable values are "text/css" and
1104                                  *  "text/javascript"; if no type is provided, text/javascript is assumed.
1105                                  */
1106                                 load: function ( modules, type ) {
1107                                         var filtered, m;
1108
1109                                         // Validate input
1110                                         if ( typeof modules !== 'object' && typeof modules !== 'string' ) {
1111                                                 throw new Error( 'modules must be a string or an array, not a ' + typeof modules );
1112                                         }
1113                                         // Allow calling with an external url or single dependency as a string
1114                                         if ( typeof modules === 'string' ) {
1115                                                 // Support adding arbitrary external scripts
1116                                                 if ( /^(https?:)?\/\//.test( modules ) ) {
1117                                                         if ( type === 'text/css' ) {
1118                                                                 $( 'head' ).append( $( '<link>', {
1119                                                                         rel: 'stylesheet',
1120                                                                         type: 'text/css',
1121                                                                         href: modules
1122                                                                 } ) );
1123                                                                 return;
1124                                                         } else if ( type === 'text/javascript' || type === undefined ) {
1125                                                                 addScript( modules );
1126                                                                 return;
1127                                                         }
1128                                                         // Unknown type
1129                                                         throw new Error( 'invalid type for external url, must be text/css or text/javascript. not ' + type );
1130                                                 }
1131                                                 // Called with single module
1132                                                 modules = [modules];
1133                                         }
1134
1135                                         // Filter out undefined modules, otherwise resolve() will throw
1136                                         // an exception for trying to load an undefined module.
1137                                         // Undefined modules are acceptable here in load(), because load() takes
1138                                         // an array of unrelated modules, whereas the modules passed to
1139                                         // using() are related and must all be loaded.
1140                                         for ( filtered = [], m = 0; m < modules.length; m += 1 ) {
1141                                                 if ( registry[modules[m]] !== undefined ) {
1142                                                         filtered[filtered.length] = modules[m];
1143                                                 }
1144                                         }
1145
1146                                         // Resolve entire dependency map
1147                                         filtered = resolve( filtered );
1148                                         // If all modules are ready, nothing dependency be done
1149                                         if ( compare( filter( ['ready'], filtered ), filtered ) ) {
1150                                                 return;
1151                                         }
1152                                         // If any modules have errors
1153                                         else if ( filter( ['error'], filtered ).length ) {
1154                                                 return;
1155                                         }
1156                                         // Since some modules are not yet ready, queue up a request
1157                                         else {
1158                                                 request( filtered );
1159                                                 return;
1160                                         }
1161                                 },
1162
1163                                 /**
1164                                  * Changes the state of a module
1165                                  *
1166                                  * @param module {String|Object} module name or object of module name/state pairs
1167                                  * @param state {String} state name
1168                                  */
1169                                 state: function ( module, state ) {
1170                                         var m;
1171                                         if ( typeof module === 'object' ) {
1172                                                 for ( m in module ) {
1173                                                         mw.loader.state( m, module[m] );
1174                                                 }
1175                                                 return;
1176                                         }
1177                                         if ( registry[module] === undefined ) {
1178                                                 mw.loader.register( module );
1179                                         }
1180                                         registry[module].state = state;
1181                                 },
1182
1183                                 /**
1184                                  * Gets the version of a module
1185                                  *
1186                                  * @param module string name of module to get version for
1187                                  */
1188                                 getVersion: function ( module ) {
1189                                         if ( registry[module] !== undefined && registry[module].version !== undefined ) {
1190                                                 return formatVersionNumber( registry[module].version );
1191                                         }
1192                                         return null;
1193                                 },
1194
1195                                 /**
1196                                  * @deprecated since 1.18 use mw.loader.getVersion() instead
1197                                  */
1198                                 version: function () {
1199                                         return mw.loader.getVersion.apply( mw.loader, arguments );
1200                                 },
1201
1202                                 /**
1203                                  * Gets the state of a module
1204                                  *
1205                                  * @param module string name of module to get state for
1206                                  */
1207                                 getState: function ( module ) {
1208                                         if ( registry[module] !== undefined && registry[module].state !== undefined ) {
1209                                                 return registry[module].state;
1210                                         }
1211                                         return null;
1212                                 },
1213
1214                                 /**
1215                                  * Get names of all registered modules.
1216                                  *
1217                                  * @return {Array}
1218                                  */
1219                                 getModuleNames: function () {
1220                                         return $.map( registry, function ( i, key ) {
1221                                                 return key;
1222                                         } );
1223                                 },
1224
1225                                 /**
1226                                  * For backwards-compatibility with Squid-cached pages. Loads mw.user
1227                                  */
1228                                 go: function () {
1229                                         mw.loader.load( 'mediawiki.user' );
1230                                 }
1231                         };
1232                 }() ),
1233
1234                 /** HTML construction helper functions */
1235                 html: ( function () {
1236                         function escapeCallback( s ) {
1237                                 switch ( s ) {
1238                                         case "'":
1239                                                 return '&#039;';
1240                                         case '"':
1241                                                 return '&quot;';
1242                                         case '<':
1243                                                 return '&lt;';
1244                                         case '>':
1245                                                 return '&gt;';
1246                                         case '&':
1247                                                 return '&amp;';
1248                                 }
1249                         }
1250
1251                         return {
1252                                 /**
1253                                  * Escape a string for HTML. Converts special characters to HTML entities.
1254                                  * @param s The string to escape
1255                                  */
1256                                 escape: function ( s ) {
1257                                         return s.replace( /['"<>&]/g, escapeCallback );
1258                                 },
1259
1260                                 /**
1261                                  * Wrapper object for raw HTML passed to mw.html.element().
1262                                  * @constructor
1263                                  */
1264                                 Raw: function ( value ) {
1265                                         this.value = value;
1266                                 },
1267
1268                                 /**
1269                                  * Wrapper object for CDATA element contents passed to mw.html.element()
1270                                  * @constructor
1271                                  */
1272                                 Cdata: function ( value ) {
1273                                         this.value = value;
1274                                 },
1275
1276                                 /**
1277                                  * Create an HTML element string, with safe escaping.
1278                                  *
1279                                  * @param name The tag name.
1280                                  * @param attrs An object with members mapping element names to values
1281                                  * @param contents The contents of the element. May be either:
1282                                  *  - string: The string is escaped.
1283                                  *  - null or undefined: The short closing form is used, e.g. <br/>.
1284                                  *  - this.Raw: The value attribute is included without escaping.
1285                                  *  - this.Cdata: The value attribute is included, and an exception is
1286                                  *   thrown if it contains an illegal ETAGO delimiter.
1287                                  *   See http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.3.2
1288                                  *
1289                                  * Example:
1290                                  *      var h = mw.html;
1291                                  *      return h.element( 'div', {},
1292                                  *              new h.Raw( h.element( 'img', {src: '<'} ) ) );
1293                                  * Returns <div><img src="&lt;"/></div>
1294                                  */
1295                                 element: function ( name, attrs, contents ) {
1296                                         var v, attrName, s = '<' + name;
1297
1298                                         for ( attrName in attrs ) {
1299                                                 v = attrs[attrName];
1300                                                 // Convert name=true, to name=name
1301                                                 if ( v === true ) {
1302                                                         v = attrName;
1303                                                 // Skip name=false
1304                                                 } else if ( v === false ) {
1305                                                         continue;
1306                                                 }
1307                                                 s += ' ' + attrName + '="' + this.escape( String( v ) ) + '"';
1308                                         }
1309                                         if ( contents === undefined || contents === null ) {
1310                                                 // Self close tag
1311                                                 s += '/>';
1312                                                 return s;
1313                                         }
1314                                         // Regular open tag
1315                                         s += '>';
1316                                         switch ( typeof contents ) {
1317                                                 case 'string':
1318                                                         // Escaped
1319                                                         s += this.escape( contents );
1320                                                         break;
1321                                                 case 'number':
1322                                                 case 'boolean':
1323                                                         // Convert to string
1324                                                         s += String( contents );
1325                                                         break;
1326                                                 default:
1327                                                         if ( contents instanceof this.Raw ) {
1328                                                                 // Raw HTML inclusion
1329                                                                 s += contents.value;
1330                                                         } else if ( contents instanceof this.Cdata ) {
1331                                                                 // CDATA
1332                                                                 if ( /<\/[a-zA-z]/.test( contents.value ) ) {
1333                                                                         throw new Error( 'mw.html.element: Illegal end tag found in CDATA' );
1334                                                                 }
1335                                                                 s += contents.value;
1336                                                         } else {
1337                                                                 throw new Error( 'mw.html.element: Invalid type of contents' );
1338                                                         }
1339                                         }
1340                                         s += '</' + name + '>';
1341                                         return s;
1342                                 }
1343                         };
1344                 })()
1345         };
1346
1347 })( jQuery );
1348
1349 // Alias $j to jQuery for backwards compatibility
1350 window.$j = jQuery;
1351
1352 // Attach to window and globally alias
1353 window.mw = window.mediaWiki = mw;
1354
1355 // Auto-register from pre-loaded startup scripts
1356 if ( typeof startUp !== 'undefined' && jQuery.isFunction( startUp ) ) {
1357         startUp();
1358         startUp = undefined;
1359 }