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         var parser;
  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                 parser = parser || mw.jqueryMsg.getMessageFunction( );
 129                 this.parameters = parameters === undefined ? [] : $.makeArray( parameters );
 130                 return this;
 131         }
 132
 133         Message.prototype = {
 134                 /**
 135                  * Appends (does not replace) parameters for replacement to the .parameters property.
 136                  *
 137                  * @param parameters Array
 138                  * @return Message
 139                  */
 140                 params: function ( parameters ) {
 141                         var i;
 142                         for ( i = 0; i < parameters.length; i += 1 ) {
 143                                 this.parameters.push( parameters[i] );
 144                         }
 145                         return this;
 146                 },
 147
 148                 /**
 149                  * Converts message object to it's string form based on the state of format.
 150                  *
 151                  * @return string Message as a string in the current form or <key> if key does not exist.
 152                  */
 153                 toString: function() {
 154                         if ( !this.exists( ) ) {
 155                                 // Use <key> as text if key does not exist
 156                                 if ( this.format !== 'plain' ) {
 157                                         // format 'escape' and 'parse' need to have the brackets and key html escaped
 158                                         return mw.html.escape( '<' + this.key + '>' );
 159                                 }
 160                                 return '<' + this.key + '>';
 161                         }
 162                         var     text = this.map.get( this.key ),
 163                                 parameters = this.parameters;
 164
 165                         if ( this.format === 'plain' ) {
 166                                 // Do not use parser unless required.
 167                                 if ( text.indexOf( '{{' ) < 0 ) {
 168                                         text = text.replace( /\$(\d+)/g, function ( str, match ) {
 169                                                 var index = parseInt( match, 10 ) - 1;
 170                                                 return parameters[index] !== undefined ? parameters[index] : '$' + match;
 171                                         } );
 172                                 }
 173                                 else{
 174                                         text = parser( this.key, this.parameters );
 175                                 }
 176                         }
 177
 178                         if ( this.format === 'escaped' ) {
 179                                 text = parser( this.key, this.parameters );
 180                                 text = mw.html.escape( text );
 181                         }
 182
 183                         if ( this.format === 'parse' ) {
 184                                 text = parser( this.key, this.parameters );
 185                         }
 186
 187                         return text;
 188                 },
 189
 190                 /**
 191                  * Changes format to parse and converts message to string
 192                  *
 193                  * @return {string} String form of parsed message
 194                  */
 195                 parse: function() {
 196                         this.format = 'parse';
 197                         return this.toString();
 198                 },
 199
 200                 /**
 201                  * Changes format to plain and converts message to string
 202                  *
 203                  * @return {string} String form of plain message
 204                  */
 205                 plain: function() {
 206                         this.format = 'plain';
 207                         return this.toString();
 208                 },
 209
 210                 /**
 211                  * Changes the format to html escaped and converts message to string
 212                  *
 213                  * @return {string} String form of html escaped message
 214                  */
 215                 escaped: function() {
 216                         this.format = 'escaped';
 217                         return this.toString();
 218                 },
 219
 220                 /**
 221                  * Checks if message exists
 222                  *
 223                  * @return {string} String form of parsed message
 224                  */
 225                 exists: function() {
 226                         return this.map.exists( this.key );
 227                 }
 228         };
 229
 230         return {
 231                 /* Public Members */
 232
 233                 /**
 234                  * Dummy function which in debug mode can be replaced with a function that
 235                  * emulates console.log in console-less environments.
 236                  */
 237                 log: function() { },
 238
 239                 /**
 240                  * @var constructor Make the Map constructor publicly available.
 241                  */
 242                 Map: Map,
 243
 244                 /**
 245                  * List of configuration values
 246                  *
 247                  * Dummy placeholder. Initiated in startUp module as a new instance of mw.Map().
 248                  * If $wgLegacyJavaScriptGlobals is true, this Map will have its values
 249                  * in the global window object.
 250                  */
 251                 config: null,
 252
 253                 /**
 254                  * @var object
 255                  *
 256                  * Empty object that plugins can be installed in.
 257                  */
 258                 libs: {},
 259
 260                 /* Extension points */
 261
 262                 legacy: {},
 263
 264                 /**
 265                  * Localization system
 266                  */
 267                 messages: new Map(),
 268
 269                 /* Public Methods */
 270
 271                 /**
 272                  * Gets a message object, similar to wfMessage()
 273                  *
 274                  * @param key string Key of message to get
 275                  * @param parameter_1 mixed First argument in a list of variadic arguments,
 276                  *  each a parameter for $N replacement in messages.
 277                  * @return Message
 278                  */
 279                 message: function ( key, parameter_1 /* [, parameter_2] */ ) {
 280                         var parameters;
 281                         // Support variadic arguments
 282                         if ( parameter_1 !== undefined ) {
 283                                 parameters = $.makeArray( arguments );
 284                                 parameters.shift();
 285                         } else {
 286                                 parameters = [];
 287                         }
 288                         return new Message( mw.messages, key, parameters );
 289                 },
 290
 291                 /**
 292                  * Gets a message string, similar to wfMsg()
 293                  *
 294                  * @param key string Key of message to get
 295                  * @param parameters mixed First argument in a list of variadic arguments,
 296                  *  each a parameter for $N replacement in messages.
 297                  * @return String.
 298                  */
 299                 msg: function ( key, parameters ) {
 300                         return mw.message.apply( mw.message, arguments ).toString();
 301                 },
 302
 303                 /**
 304                  * Client-side module loader which integrates with the MediaWiki ResourceLoader
 305                  */
 306                 loader: ( function() {
 307
 308                         /* Private Members */
 309
 310                         /**
 311                          * Mapping of registered modules
 312                          *
 313                          * The jquery module is pre-registered, because it must have already
 314                          * been provided for this object to have been built, and in debug mode
 315                          * jquery would have been provided through a unique loader request,
 316                          * making it impossible to hold back registration of jquery until after
 317                          * mediawiki.
 318                          *
 319                          * For exact details on support for script, style and messages, look at
 320                          * mw.loader.implement.
 321                          *
 322                          * Format:
 323                          *      {
 324                          *              'moduleName': {
 325                          *                      'version': ############## (unix timestamp),
 326                          *                      'dependencies': ['required.foo', 'bar.also', ...], (or) function() {}
 327                          *                      'group': 'somegroup', (or) null,
 328                          *                      'source': 'local', 'someforeignwiki', (or) null
 329                          *                      'state': 'registered', 'loading', 'loaded', 'ready', 'error' or 'missing'
 330                          *                      'script': ...,
 331                          *                      'style': ...,
 332                          *                      'messages': { 'key': 'value' },
 333                          *              }
 334                          *      }
 335                          */
 336                         var     registry = {},
 337                                 /**
 338                                  * Mapping of sources, keyed by source-id, values are objects.
 339                                  * Format:
 340                                  *      {
 341                                  *              'sourceId': {
 342                                  *                      'loadScript': 'http://foo.bar/w/load.php'
 343                                  *              }
 344                                  *      }
 345                                  */
 346                                 sources = {},
 347                                 // List of modules which will be loaded as when ready
 348                                 batch = [],
 349                                 // List of modules to be loaded
 350                                 queue = [],
 351                                 // List of callback functions waiting for modules to be ready to be called
 352                                 jobs = [],
 353                                 // Flag indicating that document ready has occured
 354                                 ready = false,
 355                                 // Whether we should try to load scripts in a blocking way
 356                                 // Set with setBlocking()
 357                                 blocking = false,
 358                                 // Selector cache for the marker element. Use getMarker() to get/use the marker!
 359                                 $marker = null;
 360
 361                         /* Cache document ready status */
 362
 363                         $(document).ready( function () {
 364                                 ready = true;
 365                         } );
 366
 367                         /* Private methods */
 368
 369                         function getMarker(){
 370                                 // Cached ?
 371                                 if ( $marker ) {
 372                                         return $marker;
 373                                 } else {
 374                                         $marker = $( 'meta[name="ResourceLoaderDynamicStyles"]' );
 375                                         if ( $marker.length ) {
 376                                                 return $marker;
 377                                         }
 378                                         mw.log( 'getMarker> No <meta name="ResourceLoaderDynamicStyles"> found, inserting dynamically.' );
 379                                         $marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' );
 380                                         return $marker;
 381                                 }
 382                         }
 383
 384                         function compare( a, b ) {
 385                                 var i;
 386                                 if ( a.length !== b.length ) {
 387                                         return false;
 388                                 }
 389                                 for ( i = 0; i < b.length; i += 1 ) {
 390                                         if ( $.isArray( a[i] ) ) {
 391                                                 if ( !compare( a[i], b[i] ) ) {
 392                                                         return false;
 393                                                 }
 394                                         }
 395                                         if ( a[i] !== b[i] ) {
 396                                                 return false;
 397                                         }
 398                                 }
 399                                 return true;
 400                         }
 401
 402                         /**
 403                          * Generates an ISO8601 "basic" string from a UNIX timestamp
 404                          */
 405                         function formatVersionNumber( timestamp ) {
 406                                 var     pad = function ( a, b, c ) {
 407                                                 return [a < 10 ? '0' + a : a, b < 10 ? '0' + b : b, c < 10 ? '0' + c : c].join( '' );
 408                                         },
 409                                         d = new Date();
 410                                 d.setTime( timestamp * 1000 );
 411                                 return [
 412                                         pad( d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate() ), 'T',
 413                                         pad( d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds() ), 'Z'
 414                                 ].join( '' );
 415                         }
 416
 417                         /**
 418                          * Recursively resolves dependencies and detects circular references
 419                          */
 420                         function recurse( module, resolved, unresolved ) {
 421                                 var n, deps, len;
 422
 423                                 if ( registry[module] === undefined ) {
 424                                         throw new Error( 'Unknown dependency: ' + module );
 425                                 }
 426                                 // Resolves dynamic loader function and replaces it with its own results
 427                                 if ( $.isFunction( registry[module].dependencies ) ) {
 428                                         registry[module].dependencies = registry[module].dependencies();
 429                                         // Ensures the module's dependencies are always in an array
 430                                         if ( typeof registry[module].dependencies !== 'object' ) {
 431                                                 registry[module].dependencies = [registry[module].dependencies];
 432                                         }
 433                                 }
 434                                 // Tracks down dependencies
 435                                 deps = registry[module].dependencies;
 436                                 len = deps.length;
 437                                 for ( n = 0; n < len; n += 1 ) {
 438                                         if ( $.inArray( deps[n], resolved ) === -1 ) {
 439                                                 if ( $.inArray( deps[n], unresolved ) !== -1 ) {
 440                                                         throw new Error(
 441                                                                 'Circular reference detected: ' + module +
 442                                                                 ' -> ' + deps[n]
 443                                                         );
 444                                                 }
 445
 446                                                 // Add to unresolved
 447                                                 unresolved[unresolved.length] = module;
 448                                                 recurse( deps[n], resolved, unresolved );
 449                                                 // module is at the end of unresolved
 450                                                 unresolved.pop();
 451                                         }
 452                                 }
 453                                 resolved[resolved.length] = module;
 454                         }
 455
 456                         /**
 457                          * Gets a list of module names that a module depends on in their proper dependency order
 458                          *
 459                          * @param module string module name or array of string module names
 460                          * @return list of dependencies, including 'module'.
 461                          * @throws Error if circular reference is detected
 462                          */
 463                         function resolve( module ) {
 464                                 var modules, m, deps, n, resolved;
 465
 466                                 // Allow calling with an array of module names
 467                                 if ( $.isArray( module ) ) {
 468                                         modules = [];
 469                                         for ( m = 0; m < module.length; m += 1 ) {
 470                                                 deps = resolve( module[m] );
 471                                                 for ( n = 0; n < deps.length; n += 1 ) {
 472                                                         modules[modules.length] = deps[n];
 473                                                 }
 474                                         }
 475                                         return modules;
 476                                 } else if ( typeof module === 'string' ) {
 477                                         resolved = [];
 478                                         recurse( module, resolved, [] );
 479                                         return resolved;
 480                                 }
 481                                 throw new Error( 'Invalid module argument: ' + module );
 482                         }
 483
 484                         /**
 485                          * Narrows a list of module names down to those matching a specific
 486                          * state (see comment on top of this scope for a list of valid states).
 487                          * One can also filter for 'unregistered', which will return the
 488                          * modules names that don't have a registry entry.
 489                          *
 490                          * @param states string or array of strings of module states to filter by
 491                          * @param modules array list of module names to filter (optional, by default the entire
 492                          * registry is used)
 493                          * @return array list of filtered module names
 494                          */
 495                         function filter( states, modules ) {
 496                                 var list, module, s, m;
 497
 498                                 // Allow states to be given as a string
 499                                 if ( typeof states === 'string' ) {
 500                                         states = [states];
 501                                 }
 502                                 // If called without a list of modules, build and use a list of all modules
 503                                 list = [];
 504                                 if ( modules === undefined ) {
 505                                         modules = [];
 506                                         for ( module in registry ) {
 507                                                 modules[modules.length] = module;
 508                                         }
 509                                 }
 510                                 // Build a list of modules which are in one of the specified states
 511                                 for ( s = 0; s < states.length; s += 1 ) {
 512                                         for ( m = 0; m < modules.length; m += 1 ) {
 513                                                 if ( registry[modules[m]] === undefined ) {
 514                                                         // Module does not exist
 515                                                         if ( states[s] === 'unregistered' ) {
 516                                                                 // OK, undefined
 517                                                                 list[list.length] = modules[m];
 518                                                         }
 519                                                 } else {
 520                                                         // Module exists, check state
 521                                                         if ( registry[modules[m]].state === states[s] ) {
 522                                                                 // OK, correct state
 523                                                                 list[list.length] = modules[m];
 524                                                         }
 525                                                 }
 526                                         }
 527                                 }
 528                                 return list;
 529                         }
 530
 531                         /**
 532                          * Automatically executes jobs and modules which are pending with satistifed dependencies.
 533                          *
 534                          * This is used when dependencies are satisfied, such as when a module is executed.
 535                          */
 536                         function handlePending( module ) {
 537                                 var j, r;
 538
 539                                 try {
 540                                         // Run jobs who's dependencies have just been met
 541                                         for ( j = 0; j < jobs.length; j += 1 ) {
 542                                                 if ( compare(
 543                                                         filter( 'ready', jobs[j].dependencies ),
 544                                                         jobs[j].dependencies ) )
 545                                                 {
 546                                                         if ( $.isFunction( jobs[j].ready ) ) {
 547                                                                 jobs[j].ready();
 548                                                         }
 549                                                         jobs.splice( j, 1 );
 550                                                         j -= 1;
 551                                                 }
 552                                         }
 553                                         // Execute modules who's dependencies have just been met
 554                                         for ( r in registry ) {
 555                                                 if ( registry[r].state === 'loaded' ) {
 556                                                         if ( compare(
 557                                                                 filter( ['ready'], registry[r].dependencies ),
 558                                                                 registry[r].dependencies ) )
 559                                                         {
 560                                                                 execute( r );
 561                                                         }
 562                                                 }
 563                                         }
 564                                 } catch ( e ) {
 565                                         // Run error callbacks of jobs affected by this condition
 566                                         for ( j = 0; j < jobs.length; j += 1 ) {
 567                                                 if ( $.inArray( module, jobs[j].dependencies ) !== -1 ) {
 568                                                         if ( $.isFunction( jobs[j].error ) ) {
 569                                                                 jobs[j].error( e, module );
 570                                                         }
 571                                                         jobs.splice( j, 1 );
 572                                                         j -= 1;
 573                                                 }
 574                                         }
 575                                 }
 576                         }
 577
 578                         /**
 579                          * Adds a script tag to the DOM, either using document.write or low-level DOM manipulation,
 580                          * depending on whether document-ready has occured yet and whether we are in blocking mode.
 581                          *
 582                          * @param src String: URL to script, will be used as the src attribute in the script tag
 583                          * @param callback Function: Optional callback which will be run when the script is done
 584                          */
 585                         function addScript( src, callback ) {
 586                                 var done = false, script, head;
 587                                 if ( ready || !blocking ) {
 588                                         // jQuery's getScript method is NOT better than doing this the old-fashioned way
 589                                         // because jQuery will eval the script's code, and errors will not have sane
 590                                         // line numbers.
 591                                         script = document.createElement( 'script' );
 592                                         script.setAttribute( 'src', src );
 593                                         script.setAttribute( 'type', 'text/javascript' );
 594                                         if ( $.isFunction( callback ) ) {
 595                                                 // Attach handlers for all browsers (based on jQuery.ajax)
 596                                                 script.onload = script.onreadystatechange = function() {
 597
 598                                                         if (
 599                                                                 !done
 600                                                                 && (
 601                                                                         !script.readyState
 602                                                                         || /loaded|complete/.test( script.readyState )
 603                                                                 )
 604                                                         ) {
 605
 606                                                                 done = true;
 607
 608                                                                 // Handle memory leak in IE
 609                                                                 script.onload = script.onreadystatechange = null;
 610
 611                                                                 callback();
 612
 613                                                                 if ( script.parentNode ) {
 614                                                                         script.parentNode.removeChild( script );
 615                                                                 }
 616
 617                                                                 // Dereference the script
 618                                                                 script = undefined;
 619                                                         }
 620                                                 };
 621                                         }
 622                                         // IE-safe way of getting the <head> . document.documentElement.head doesn't
 623                                         // work in scripts that run in the <head>
 624                                         head = document.getElementsByTagName( 'head' )[0];
 625                                         // Append to the <body> if available, to the <head> otherwise
 626                                         (document.body || head).appendChild( script );
 627                                 } else {
 628                                         document.write( mw.html.element(
 629                                                 'script', { 'type': 'text/javascript', 'src': src }, ''
 630                                         ) );
 631                                         if ( $.isFunction( callback ) ) {
 632                                                 // Document.write is synchronous, so this is called when it's done
 633                                                 // FIXME: that's a lie. doc.write isn't actually synchronous
 634                                                 callback();
 635                                         }
 636                                 }
 637                         }
 638
 639                         /**
 640                          * Executes a loaded module, making it ready to use
 641                          *
 642                          * @param module string module name to execute
 643                          */
 644                         function execute( module, callback ) {
 645                                 var style, media, i, script, markModuleReady, nestedAddScript;
 646
 647                                 if ( registry[module] === undefined ) {
 648                                         throw new Error( 'Module has not been registered yet: ' + module );
 649                                 } else if ( registry[module].state === 'registered' ) {
 650                                         throw new Error( 'Module has not been requested from the server yet: ' + module );
 651                                 } else if ( registry[module].state === 'loading' ) {
 652                                         throw new Error( 'Module has not completed loading yet: ' + module );
 653                                 } else if ( registry[module].state === 'ready' ) {
 654                                         throw new Error( 'Module has already been loaded: ' + module );
 655                                 }
 656
 657                                 // Add styles
 658                                 if ( $.isPlainObject( registry[module].style ) ) {
 659                                         for ( media in registry[module].style ) {
 660                                                 style = registry[module].style[media];
 661                                                 if ( $.isArray( style ) ) {
 662                                                         for ( i = 0; i < style.length; i += 1 ) {
 663                                                                 getMarker().before( mw.html.element( 'link', {
 664                                                                         'type': 'text/css',
 665                                                                         'media': media,
 666                                                                         'rel': 'stylesheet',
 667                                                                         'href': style[i]
 668                                                                 } ) );
 669                                                         }
 670                                                 } else if ( typeof style === 'string' ) {
 671                                                         getMarker().before( mw.html.element( 'style', {
 672                                                                 'type': 'text/css',
 673                                                                 'media': media
 674                                                         }, new mw.html.Cdata( style ) ) );
 675                                                 }
 676                                         }
 677                                 }
 678                                 // Add localizations to message system
 679                                 if ( $.isPlainObject( registry[module].messages ) ) {
 680                                         mw.messages.set( registry[module].messages );
 681                                 }
 682                                 // Execute script
 683                                 try {
 684                                         script = registry[module].script;
 685                                         markModuleReady = function() {
 686                                                 registry[module].state = 'ready';
 687                                                 handlePending( module );
 688                                                 if ( $.isFunction( callback ) ) {
 689                                                         callback();
 690                                                 }
 691                                         };
 692                                         nestedAddScript = function ( arr, callback, i ) {
 693                                                 // Recursively call addScript() in its own callback
 694                                                 // for each element of arr.
 695                                                 if ( i >= arr.length ) {
 696                                                         // We're at the end of the array
 697                                                         callback();
 698                                                         return;
 699                                                 }
 700
 701                                                 addScript( arr[i], function() {
 702                                                         nestedAddScript( arr, callback, i + 1 );
 703                                                 } );
 704                                         };
 705
 706                                         if ( $.isArray( script ) ) {
 707                                                 registry[module].state = 'loading';
 708                                                 nestedAddScript( script, markModuleReady, 0 );
 709                                         } else if ( $.isFunction( script ) ) {
 710                                                 script( $ );
 711                                                 markModuleReady();
 712                                         }
 713                                 } catch ( e ) {
 714                                         // This needs to NOT use mw.log because these errors are common in production mode
 715                                         // and not in debug mode, such as when a symbol that should be global isn't exported
 716                                         if ( window.console && typeof window.console.log === 'function' ) {
 717                                                 console.log( 'mw.loader::execute> Exception thrown by ' + module + ': ' + e.message );
 718                                         }
 719                                         registry[module].state = 'error';
 720                                         throw e;
 721                                 }
 722                         }
 723
 724                         /**
 725                          * Adds a dependencies to the queue with optional callbacks to be run
 726                          * when the dependencies are ready or fail
 727                          *
 728                          * @param dependencies string module name or array of string module names
 729                          * @param ready function callback to execute when all dependencies are ready
 730                          * @param error function callback to execute when any dependency fails
 731                          */
 732                         function request( dependencies, ready, error ) {
 733                                 var regItemDeps, regItemDepLen, n;
 734
 735                                 // Allow calling by single module name
 736                                 if ( typeof dependencies === 'string' ) {
 737                                         dependencies = [dependencies];
 738                                         if ( registry[dependencies[0]] !== undefined ) {
 739                                                 // Cache repetitively accessed deep level object member
 740                                                 regItemDeps = registry[dependencies[0]].dependencies;
 741                                                 // Cache to avoid looped access to length property
 742                                                 regItemDepLen = regItemDeps.length;
 743                                                 for ( n = 0; n < regItemDepLen; n += 1 ) {
 744                                                         dependencies[dependencies.length] = regItemDeps[n];
 745                                                 }
 746                                         }
 747                                 }
 748                                 // Add ready and error callbacks if they were given
 749                                 if ( arguments.length > 1 ) {
 750                                         jobs[jobs.length] = {
 751                                                 'dependencies': filter(
 752                                                         ['registered', 'loading', 'loaded'],
 753                                                         dependencies
 754                                                 ),
 755                                                 'ready': ready,
 756                                                 'error': error
 757                                         };
 758                                 }
 759                                 // Queue up any dependencies that are registered
 760                                 dependencies = filter( ['registered'], dependencies );
 761                                 for ( n = 0; n < dependencies.length; n += 1 ) {
 762                                         if ( $.inArray( dependencies[n], queue ) === -1 ) {
 763                                                 queue[queue.length] = dependencies[n];
 764                                         }
 765                                 }
 766                                 // Work the queue
 767                                 mw.loader.work();
 768                         }
 769
 770                         function sortQuery(o) {
 771                                 var sorted = {}, key, a = [];
 772                                 for ( key in o ) {
 773                                         if ( hasOwn.call( o, key ) ) {
 774                                                 a.push( key );
 775                                         }
 776                                 }
 777                                 a.sort();
 778                                 for ( key = 0; key < a.length; key += 1 ) {
 779                                         sorted[a[key]] = o[a[key]];
 780                                 }
 781                                 return sorted;
 782                         }
 783
 784                         /**
 785                          * Converts a module map of the form { foo: [ 'bar', 'baz' ], bar: [ 'baz, 'quux' ] }
 786                          * to a query string of the form foo.bar,baz|bar.baz,quux
 787                          */
 788                         function buildModulesString( moduleMap ) {
 789                                 var arr = [], p, prefix;
 790                                 for ( prefix in moduleMap ) {
 791                                         p = prefix === '' ? '' : prefix + '.';
 792                                         arr.push( p + moduleMap[prefix].join( ',' ) );
 793                                 }
 794                                 return arr.join( '|' );
 795                         }
 796
 797                         /**
 798                          * Asynchronously append a script tag to the end of the body
 799                          * that invokes load.php
 800                          * @param moduleMap {Object}: Module map, see buildModulesString()
 801                          * @param currReqBase {Object}: Object with other parameters (other than 'modules') to use in the request
 802                          * @param sourceLoadScript {String}: URL of load.php
 803                          */
 804                         function doRequest( moduleMap, currReqBase, sourceLoadScript ) {
 805                                 var request = $.extend(
 806                                         { 'modules': buildModulesString( moduleMap ) },
 807                                         currReqBase
 808                                 );
 809                                 request = sortQuery( request );
 810                                 // Asynchronously append a script tag to the end of the body
 811                                 // Append &* to avoid triggering the IE6 extension check
 812                                 addScript( sourceLoadScript + '?' + $.param( request ) + '&*' );
 813                         }
 814
 815                         /* Public Methods */
 816                         return {
 817                                 /**
 818                                  * Requests dependencies from server, loading and executing when things when ready.
 819                                  */
 820                                 work: function () {
 821                                         var     reqBase, splits, maxQueryLength, q, b, bSource, bGroup, bSourceGroup,
 822                                                 source, group, g, i, modules, maxVersion, sourceLoadScript,
 823                                                 currReqBase, currReqBaseLength, moduleMap, l,
 824                                                 lastDotIndex, prefix, suffix, bytesAdded;
 825
 826                                         // Build a list of request parameters common to all requests.
 827                                         reqBase = {
 828                                                 skin: mw.config.get( 'skin' ),
 829                                                 lang: mw.config.get( 'wgUserLanguage' ),
 830                                                 debug: mw.config.get( 'debug' )
 831                                         };
 832                                         // Split module batch by source and by group.
 833                                         splits = {};
 834                                         maxQueryLength = mw.config.get( 'wgResourceLoaderMaxQueryLength', -1 );
 835
 836                                         // Appends a list of modules from the queue to the batch
 837                                         for ( q = 0; q < queue.length; q += 1 ) {
 838                                                 // Only request modules which are registered
 839                                                 if ( registry[queue[q]] !== undefined && registry[queue[q]].state === 'registered' ) {
 840                                                         // Prevent duplicate entries
 841                                                         if ( $.inArray( queue[q], batch ) === -1 ) {
 842                                                                 batch[batch.length] = queue[q];
 843                                                                 // Mark registered modules as loading
 844                                                                 registry[queue[q]].state = 'loading';
 845                                                         }
 846                                                 }
 847                                         }
 848                                         // Early exit if there's nothing to load...
 849                                         if ( !batch.length ) {
 850                                                 return;
 851                                         }
 852
 853                                         // The queue has been processed into the batch, clear up the queue.
 854                                         queue = [];
 855
 856                                         // Always order modules alphabetically to help reduce cache
 857                                         // misses for otherwise identical content.
 858                                         batch.sort();
 859
 860                                         // Split batch by source and by group.
 861                                         for ( b = 0; b < batch.length; b += 1 ) {
 862                                                 bSource = registry[batch[b]].source;
 863                                                 bGroup = registry[batch[b]].group;
 864                                                 if ( splits[bSource] === undefined ) {
 865                                                         splits[bSource] = {};
 866                                                 }
 867                                                 if ( splits[bSource][bGroup] === undefined ) {
 868                                                         splits[bSource][bGroup] = [];
 869                                                 }
 870                                                 bSourceGroup = splits[bSource][bGroup];
 871                                                 bSourceGroup[bSourceGroup.length] = batch[b];
 872                                         }
 873
 874                                         // Clear the batch - this MUST happen before we append any
 875                                         // script elements to the body or it's possible that a script
 876                                         // will be locally cached, instantly load, and work the batch
 877                                         // again, all before we've cleared it causing each request to
 878                                         // include modules which are already loaded.
 879                                         batch = [];
 880
 881                                         for ( source in splits ) {
 882
 883                                                 sourceLoadScript = sources[source].loadScript;
 884
 885                                                 for ( group in splits[source] ) {
 886
 887                                                         // Cache access to currently selected list of
 888                                                         // modules for this group from this source.
 889                                                         modules = splits[source][group];
 890
 891                                                         // Calculate the highest timestamp
 892                                                         maxVersion = 0;
 893                                                         for ( g = 0; g < modules.length; g += 1 ) {
 894                                                                 if ( registry[modules[g]].version > maxVersion ) {
 895                                                                         maxVersion = registry[modules[g]].version;
 896                                                                 }
 897                                                         }
 898
 899                                                         currReqBase = $.extend( { 'version': formatVersionNumber( maxVersion ) }, reqBase );
 900                                                         currReqBaseLength = $.param( currReqBase ).length;
 901                                                         moduleMap = {};
 902                                                         // We may need to split up the request to honor the query string length limit,
 903                                                         // so build it piece by piece.
 904                                                         l = currReqBaseLength + 9; // '&modules='.length == 9
 905
 906                                                         moduleMap = {}; // { prefix: [ suffixes ] }
 907
 908                                                         for ( i = 0; i < modules.length; i += 1 ) {
 909                                                                 // Determine how many bytes this module would add to the query string
 910                                                                 lastDotIndex = modules[i].lastIndexOf( '.' );
 911                                                                 // Note that these substr() calls work even if lastDotIndex == -1
 912                                                                 prefix = modules[i].substr( 0, lastDotIndex );
 913                                                                 suffix = modules[i].substr( lastDotIndex + 1 );
 914                                                                 bytesAdded = moduleMap[prefix] !== undefined
 915                                                                         ? suffix.length + 3 // '%2C'.length == 3
 916                                                                         : modules[i].length + 3; // '%7C'.length == 3
 917
 918                                                                 // If the request would become too long, create a new one,
 919                                                                 // but don't create empty requests
 920                                                                 if ( maxQueryLength > 0 && !$.isEmptyObject( moduleMap ) && l + bytesAdded > maxQueryLength ) {
 921                                                                         // This request would become too long, create a new one
 922                                                                         // and fire off the old one
 923                                                                         doRequest( moduleMap, currReqBase, sourceLoadScript );
 924                                                                         moduleMap = {};
 925                                                                         l = currReqBaseLength + 9;
 926                                                                 }
 927                                                                 if ( moduleMap[prefix] === undefined ) {
 928                                                                         moduleMap[prefix] = [];
 929                                                                 }
 930                                                                 moduleMap[prefix].push( suffix );
 931                                                                 l += bytesAdded;
 932                                                         }
 933                                                         // If there's anything left in moduleMap, request that too
 934                                                         if ( !$.isEmptyObject( moduleMap ) ) {
 935                                                                 doRequest( moduleMap, currReqBase, sourceLoadScript );
 936                                                         }
 937                                                 }
 938                                         }
 939                                 },
 940
 941                                 /**
 942                                  * Register a source.
 943                                  *
 944                                  * @param id {String}: Short lowercase a-Z string representing a source, only used internally.
 945                                  * @param props {Object}: Object containing only the loadScript property which is a url to
 946                                  * the load.php location of the source.
 947                                  * @return {Boolean}
 948                                  */
 949                                 addSource: function ( id, props ) {
 950                                         var source;
 951                                         // Allow multiple additions
 952                                         if ( typeof id === 'object' ) {
 953                                                 for ( source in id ) {
 954                                                         mw.loader.addSource( source, id[source] );
 955                                                 }
 956                                                 return true;
 957                                         }
 958
 959                                         if ( sources[id] !== undefined ) {
 960                                                 throw new Error( 'source already registered: ' + id );
 961                                         }
 962
 963                                         sources[id] = props;
 964
 965                                         return true;
 966                                 },
 967
 968                                 /**
 969                                  * Registers a module, letting the system know about it and its
 970                                  * properties. Startup modules contain calls to this function.
 971                                  *
 972                                  * @param module {String}: Module name
 973                                  * @param version {Number}: Module version number as a timestamp (falls backs to 0)
 974                                  * @param dependencies {String|Array|Function}: One string or array of strings of module
 975                                  *  names on which this module depends, or a function that returns that array.
 976                                  * @param group {String}: Group which the module is in (optional, defaults to null)
 977                                  * @param source {String}: Name of the source. Defaults to local.
 978                                  */
 979                                 register: function ( module, version, dependencies, group, source ) {
 980                                         var m;
 981                                         // Allow multiple registration
 982                                         if ( typeof module === 'object' ) {
 983                                                 for ( m = 0; m < module.length; m += 1 ) {
 984                                                         // module is an array of module names
 985                                                         if ( typeof module[m] === 'string' ) {
 986                                                                 mw.loader.register( module[m] );
 987                                                         // module is an array of arrays
 988                                                         } else if ( typeof module[m] === 'object' ) {
 989                                                                 mw.loader.register.apply( mw.loader, module[m] );
 990                                                         }
 991                                                 }
 992                                                 return;
 993                                         }
 994                                         // Validate input
 995                                         if ( typeof module !== 'string' ) {
 996                                                 throw new Error( 'module must be a string, not a ' + typeof module );
 997                                         }
 998                                         if ( registry[module] !== undefined ) {
 999                                                 throw new Error( 'module already registered: ' + module );
1000                                         }
1001                                         // List the module as registered
1002                                         registry[module] = {
1003                                                 'version': version !== undefined ? parseInt( version, 10 ) : 0,
1004                                                 'dependencies': [],
1005                                                 'group': typeof group === 'string' ? group : null,
1006                                                 'source': typeof source === 'string' ? source: 'local',
1007                                                 'state': 'registered'
1008                                         };
1009                                         if ( typeof dependencies === 'string' ) {
1010                                                 // Allow dependencies to be given as a single module name
1011                                                 registry[module].dependencies = [dependencies];
1012                                         } else if ( typeof dependencies === 'object' || $.isFunction( dependencies ) ) {
1013                                                 // Allow dependencies to be given as an array of module names
1014                                                 // or a function which returns an array
1015                                                 registry[module].dependencies = dependencies;
1016                                         }
1017                                 },
1018
1019                                 /**
1020                                  * Implements a module, giving the system a course of action to take
1021                                  * upon loading. Results of a request for one or more modules contain
1022                                  * calls to this function.
1023                                  *
1024                                  * All arguments are required.
1025                                  *
1026                                  * @param module String: Name of module
1027                                  * @param script Mixed: Function of module code or String of URL to be used as the src
1028                                  *  attribute when adding a script element to the body
1029                                  * @param style Object: Object of CSS strings keyed by media-type or Object of lists of URLs
1030                                  *  keyed by media-type
1031                                  * @param msgs Object: List of key/value pairs to be passed through mw.messages.set
1032                                  */
1033                                 implement: function ( module, script, style, msgs ) {
1034                                         // Validate input
1035                                         if ( typeof module !== 'string' ) {
1036                                                 throw new Error( 'module must be a string, not a ' + typeof module );
1037                                         }
1038                                         if ( !$.isFunction( script ) && !$.isArray( script ) ) {
1039                                                 throw new Error( 'script must be a function or an array, not a ' + typeof script );
1040                                         }
1041                                         if ( !$.isPlainObject( style ) ) {
1042                                                 throw new Error( 'style must be an object, not a ' + typeof style );
1043                                         }
1044                                         if ( !$.isPlainObject( msgs ) ) {
1045                                                 throw new Error( 'msgs must be an object, not a ' + typeof msgs );
1046                                         }
1047                                         // Automatically register module
1048                                         if ( registry[module] === undefined ) {
1049                                                 mw.loader.register( module );
1050                                         }
1051                                         // Check for duplicate implementation
1052                                         if ( registry[module] !== undefined && registry[module].script !== undefined ) {
1053                                                 throw new Error( 'module already implemented: ' + module );
1054                                         }
1055                                         // Mark module as loaded
1056                                         registry[module].state = 'loaded';
1057                                         // Attach components
1058                                         registry[module].script = script;
1059                                         registry[module].style = style;
1060                                         registry[module].messages = msgs;
1061                                         // Execute or queue callback
1062                                         if ( compare(
1063                                                 filter( ['ready'], registry[module].dependencies ),
1064                                                 registry[module].dependencies ) )
1065                                         {
1066                                                 execute( module );
1067                                         }
1068                                 },
1069
1070                                 /**
1071                                  * Executes a function as soon as one or more required modules are ready
1072                                  *
1073                                  * @param dependencies {String|Array} Module name or array of modules names the callback
1074                                  *  dependends on to be ready before executing
1075                                  * @param ready {Function} callback to execute when all dependencies are ready (optional)
1076                                  * @param error {Function} callback to execute when if dependencies have a errors (optional)
1077                                  */
1078                                 using: function ( dependencies, ready, error ) {
1079                                         var tod = typeof dependencies;
1080                                         // Validate input
1081                                         if ( tod !== 'object' && tod !== 'string' ) {
1082                                                 throw new Error( 'dependencies must be a string or an array, not a ' + tod );
1083                                         }
1084                                         // Allow calling with a single dependency as a string
1085                                         if ( tod === 'string' ) {
1086                                                 dependencies = [dependencies];
1087                                         }
1088                                         // Resolve entire dependency map
1089                                         dependencies = resolve( dependencies );
1090                                         // If all dependencies are met, execute ready immediately
1091                                         if ( compare( filter( ['ready'], dependencies ), dependencies ) ) {
1092                                                 if ( $.isFunction( ready ) ) {
1093                                                         ready();
1094                                                 }
1095                                         }
1096                                         // If any dependencies have errors execute error immediately
1097                                         else if ( filter( ['error'], dependencies ).length ) {
1098                                                 if ( $.isFunction( error ) ) {
1099                                                         error( new Error( 'one or more dependencies have state "error"' ),
1100                                                                 dependencies );
1101                                                 }
1102                                         }
1103                                         // Since some dependencies are not yet ready, queue up a request
1104                                         else {
1105                                                 request( dependencies, ready, error );
1106                                         }
1107                                 },
1108
1109                                 /**
1110                                  * Loads an external script or one or more modules for future use
1111                                  *
1112                                  * @param modules {mixed} Either the name of a module, array of modules,
1113                                  *  or a URL of an external script or style
1114                                  * @param type {String} mime-type to use if calling with a URL of an
1115                                  *  external script or style; acceptable values are "text/css" and
1116                                  *  "text/javascript"; if no type is provided, text/javascript is assumed.
1117                                  */
1118                                 load: function ( modules, type ) {
1119                                         var filtered, m;
1120
1121                                         // Validate input
1122                                         if ( typeof modules !== 'object' && typeof modules !== 'string' ) {
1123                                                 throw new Error( 'modules must be a string or an array, not a ' + typeof modules );
1124                                         }
1125                                         // Allow calling with an external url or single dependency as a string
1126                                         if ( typeof modules === 'string' ) {
1127                                                 // Support adding arbitrary external scripts
1128                                                 if ( /^(https?:)?\/\//.test( modules ) ) {
1129                                                         if ( type === 'text/css' ) {
1130                                                                 $( 'head' ).append( $( '<link>', {
1131                                                                         rel: 'stylesheet',
1132                                                                         type: 'text/css',
1133                                                                         href: modules
1134                                                                 } ) );
1135                                                                 return;
1136                                                         } else if ( type === 'text/javascript' || type === undefined ) {
1137                                                                 addScript( modules );
1138                                                                 return;
1139                                                         }
1140                                                         // Unknown type
1141                                                         throw new Error( 'invalid type for external url, must be text/css or text/javascript. not ' + type );
1142                                                 }
1143                                                 // Called with single module
1144                                                 modules = [modules];
1145                                         }
1146
1147                                         // Filter out undefined modules, otherwise resolve() will throw
1148                                         // an exception for trying to load an undefined module.
1149                                         // Undefined modules are acceptable here in load(), because load() takes
1150                                         // an array of unrelated modules, whereas the modules passed to
1151                                         // using() are related and must all be loaded.
1152                                         for ( filtered = [], m = 0; m < modules.length; m += 1 ) {
1153                                                 if ( registry[modules[m]] !== undefined ) {
1154                                                         filtered[filtered.length] = modules[m];
1155                                                 }
1156                                         }
1157
1158                                         // Resolve entire dependency map
1159                                         filtered = resolve( filtered );
1160                                         // If all modules are ready, nothing dependency be done
1161                                         if ( compare( filter( ['ready'], filtered ), filtered ) ) {
1162                                                 return;
1163                                         }
1164                                         // If any modules have errors
1165                                         else if ( filter( ['error'], filtered ).length ) {
1166                                                 return;
1167                                         }
1168                                         // Since some modules are not yet ready, queue up a request
1169                                         else {
1170                                                 request( filtered );
1171                                                 return;
1172                                         }
1173                                 },
1174
1175                                 /**
1176                                  * Changes the state of a module
1177                                  *
1178                                  * @param module {String|Object} module name or object of module name/state pairs
1179                                  * @param state {String} state name
1180                                  */
1181                                 state: function ( module, state ) {
1182                                         var m;
1183                                         if ( typeof module === 'object' ) {
1184                                                 for ( m in module ) {
1185                                                         mw.loader.state( m, module[m] );
1186                                                 }
1187                                                 return;
1188                                         }
1189                                         if ( registry[module] === undefined ) {
1190                                                 mw.loader.register( module );
1191                                         }
1192                                         registry[module].state = state;
1193                                 },
1194
1195                                 /**
1196                                  * Gets the version of a module
1197                                  *
1198                                  * @param module string name of module to get version for
1199                                  */
1200                                 getVersion: function ( module ) {
1201                                         if ( registry[module] !== undefined && registry[module].version !== undefined ) {
1202                                                 return formatVersionNumber( registry[module].version );
1203                                         }
1204                                         return null;
1205                                 },
1206
1207                                 /**
1208                                  * @deprecated since 1.18 use mw.loader.getVersion() instead
1209                                  */
1210                                 version: function () {
1211                                         return mw.loader.getVersion.apply( mw.loader, arguments );
1212                                 },
1213
1214                                 /**
1215                                  * Gets the state of a module
1216                                  *
1217                                  * @param module string name of module to get state for
1218                                  */
1219                                 getState: function ( module ) {
1220                                         if ( registry[module] !== undefined && registry[module].state !== undefined ) {
1221                                                 return registry[module].state;
1222                                         }
1223                                         return null;
1224                                 },
1225
1226                                 /**
1227                                  * Get names of all registered modules.
1228                                  *
1229                                  * @return {Array}
1230                                  */
1231                                 getModuleNames: function () {
1232                                         return $.map( registry, function ( i, key ) {
1233                                                 return key;
1234                                         } );
1235                                 },
1236
1237                                 /**
1238                                  * Enable or disable blocking. If blocking is enabled and
1239                                  * document ready has not yet occurred, scripts will be loaded
1240                                  * in a blocking way (using document.write) rather than
1241                                  * asynchronously using DOM manipulation
1242                                  *
1243                                  * @param b {Boolean} True to enable blocking, false to disable it
1244                                  */
1245                                 setBlocking: function( b ) {
1246                                         blocking = b;
1247                                 },
1248
1249                                 /**
1250                                  * For backwards-compatibility with Squid-cached pages. Loads mw.user
1251                                  */
1252                                 go: function () {
1253                                         mw.loader.load( 'mediawiki.user' );
1254                                 }
1255                         };
1256                 }() ),
1257
1258                 /** HTML construction helper functions */
1259                 html: ( function () {
1260                         function escapeCallback( s ) {
1261                                 switch ( s ) {
1262                                         case "'":
1263                                                 return '&#039;';
1264                                         case '"':
1265                                                 return '&quot;';
1266                                         case '<':
1267                                                 return '&lt;';
1268                                         case '>':
1269                                                 return '&gt;';
1270                                         case '&':
1271                                                 return '&amp;';
1272                                 }
1273                         }
1274
1275                         return {
1276                                 /**
1277                                  * Escape a string for HTML. Converts special characters to HTML entities.
1278                                  * @param s The string to escape
1279                                  */
1280                                 escape: function ( s ) {
1281                                         return s.replace( /['"<>&]/g, escapeCallback );
1282                                 },
1283
1284                                 /**
1285                                  * Wrapper object for raw HTML passed to mw.html.element().
1286                                  * @constructor
1287                                  */
1288                                 Raw: function ( value ) {
1289                                         this.value = value;
1290                                 },
1291
1292                                 /**
1293                                  * Wrapper object for CDATA element contents passed to mw.html.element()
1294                                  * @constructor
1295                                  */
1296                                 Cdata: function ( value ) {
1297                                         this.value = value;
1298                                 },
1299
1300                                 /**
1301                                  * Create an HTML element string, with safe escaping.
1302                                  *
1303                                  * @param name The tag name.
1304                                  * @param attrs An object with members mapping element names to values
1305                                  * @param contents The contents of the element. May be either:
1306                                  *  - string: The string is escaped.
1307                                  *  - null or undefined: The short closing form is used, e.g. <br/>.
1308                                  *  - this.Raw: The value attribute is included without escaping.
1309                                  *  - this.Cdata: The value attribute is included, and an exception is
1310                                  *   thrown if it contains an illegal ETAGO delimiter.
1311                                  *   See http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.3.2
1312                                  *
1313                                  * Example:
1314                                  *      var h = mw.html;
1315                                  *      return h.element( 'div', {},
1316                                  *              new h.Raw( h.element( 'img', {src: '<'} ) ) );
1317                                  * Returns <div><img src="&lt;"/></div>
1318                                  */
1319                                 element: function ( name, attrs, contents ) {
1320                                         var v, attrName, s = '<' + name;
1321
1322                                         for ( attrName in attrs ) {
1323                                                 v = attrs[attrName];
1324                                                 // Convert name=true, to name=name
1325                                                 if ( v === true ) {
1326                                                         v = attrName;
1327                                                 // Skip name=false
1328                                                 } else if ( v === false ) {
1329                                                         continue;
1330                                                 }
1331                                                 s += ' ' + attrName + '="' + this.escape( String( v ) ) + '"';
1332                                         }
1333                                         if ( contents === undefined || contents === null ) {
1334                                                 // Self close tag
1335                                                 s += '/>';
1336                                                 return s;
1337                                         }
1338                                         // Regular open tag
1339                                         s += '>';
1340                                         switch ( typeof contents ) {
1341                                                 case 'string':
1342                                                         // Escaped
1343                                                         s += this.escape( contents );
1344                                                         break;
1345                                                 case 'number':
1346                                                 case 'boolean':
1347                                                         // Convert to string
1348                                                         s += String( contents );
1349                                                         break;
1350                                                 default:
1351                                                         if ( contents instanceof this.Raw ) {
1352                                                                 // Raw HTML inclusion
1353                                                                 s += contents.value;
1354                                                         } else if ( contents instanceof this.Cdata ) {
1355                                                                 // CDATA
1356                                                                 if ( /<\/[a-zA-z]/.test( contents.value ) ) {
1357                                                                         throw new Error( 'mw.html.element: Illegal end tag found in CDATA' );
1358                                                                 }
1359                                                                 s += contents.value;
1360                                                         } else {
1361                                                                 throw new Error( 'mw.html.element: Invalid type of contents' );
1362                                                         }
1363                                         }
1364                                         s += '</' + name + '>';
1365                                         return s;
1366                                 }
1367                         };
1368                 })()
1369         };
1370
1371 })( jQuery );
1372
1373 // Alias $j to jQuery for backwards compatibility
1374 window.$j = jQuery;
1375
1376 // Attach to window and globally alias
1377 window.mw = window.mediaWiki = mw;
1378
1379 // Auto-register from pre-loaded startup scripts
1380 if ( typeof startUp !== 'undefined' && jQuery.isFunction( startUp ) ) {
1381         startUp();
1382         startUp = undefined;
1383 }