resources/mediawiki/mediawiki.js

   1 /*
   2  * JavaScript backwards-compatibility and support
   3  */
   4
   5 // Make calling .indexOf() on an array work on older browsers
   6 if ( typeof Array.prototype.indexOf === 'undefined' ) {
   7         Array.prototype.indexOf = function( needle ) {
   8                 for ( var i = 0; i < this.length; i++ ) {
   9                         if ( this[i] === needle ) {
  10                                 return i;
  11                         }
  12                 }
  13                 return -1;
  14         };
  15 }
  16 // Add array comparison functionality
  17 if ( typeof Array.prototype.compare === 'undefined' ) {
  18         Array.prototype.compare = function( against ) {
  19                 if ( this.length != against.length ) {
  20                         return false;
  21                 }
  22                 for ( var i = 0; i < against.length; i++ ) {
  23                         if ( this[i].compare ) {
  24                                 if ( !this[i].compare( against[i] ) ) {
  25                                         return false;
  26                                 }
  27                         }
  28                         if ( this[i] !== against[i] ) {
  29                                 return false;
  30                         }
  31                 }
  32                 return true;
  33         };
  34 }
  35
  36 /*
  37  * Core MediaWiki JavaScript Library
  38  */
  39 // Attach to window
  40 window.mediaWiki = new ( function( $ ) {
  41
  42         /* Constants */
  43
  44         // This will not change until we are 100% ready to turn off legacy globals
  45         const LEGACY_GLOBALS = true;
  46
  47         /* Members */
  48
  49         this.legacy = LEGACY_GLOBALS ? window : {};
  50
  51         /* Methods */
  52
  53         /*
  54          * Dummy function which in debug mode can be replaced with a function that does something clever
  55          */
  56         this.log = function() { };
  57         /*
  58          * An object which allows single and multiple existence, setting and getting on a list of key / value pairs
  59          */
  60         this.config = new ( function() {
  61
  62                 /* Private Members */
  63
  64                 var that = this;
  65                 // List of configuration values - in legacy mode these configurations were ALL in the global space
  66                 var values = LEGACY_GLOBALS ? window : {};
  67
  68                 /* Public Methods */
  69
  70                 /**
  71                  * Sets one or multiple configuration values using a key and a value or an object of keys and values
  72                  */
  73                 this.set = function( keys, value ) {
  74                         if ( typeof keys === 'object' ) {
  75                                 for ( var k in keys ) {
  76                                         values[k] = keys[k];
  77                                 }
  78                         } else if ( typeof keys === 'string' && typeof value !== 'undefined' ) {
  79                                 values[keys] = value;
  80                         }
  81                 };
  82                 /**
  83                  * Gets one or multiple configuration values using a key and an optional fallback or an array of keys
  84                  */
  85                 this.get = function( keys, fallback ) {
  86                         if ( typeof keys === 'object' ) {
  87                                 var result = {};
  88                                 for ( var k = 0; k < keys.length; k++ ) {
  89                                         if ( typeof values[keys[k]] !== 'undefined' ) {
  90                                                 result[keys[k]] = values[keys[k]];
  91                                         }
  92                                 }
  93                                 return result;
  94                         } else if ( typeof keys === 'string' ) {
  95                                 if ( typeof values[keys] === 'undefined' ) {
  96                                         return typeof fallback !== 'undefined' ? fallback : null;
  97                                 } else {
  98                                         return values[keys];
  99                                 }
 100                         } else {
 101                                 return values;
 102                         }
 103                 };
 104                 /**
 105                  * Checks if one or multiple configuration fields exist
 106                  */
 107                 this.exists = function( keys ) {
 108                         if ( typeof keys === 'object' ) {
 109                                 for ( var k = 0; k < keys.length; k++ ) {
 110                                         if ( !( keys[k] in values ) ) {
 111                                                 return false;
 112                                         }
 113                                 }
 114                                 return true;
 115                         } else {
 116                                 return keys in values;
 117                         }
 118                 };
 119         } )();
 120         /*
 121          * Localization system
 122          */
 123         this.msg = new ( function() {
 124
 125                 /* Private Members */
 126
 127                 var that = this;
 128                 // List of localized messages
 129                 var messages = {};
 130
 131                 /* Public Methods */
 132
 133                 this.set = function( keys, value ) {
 134                         if ( typeof keys === 'object' ) {
 135                                 for ( var k in keys ) {
 136                                         messages[k] = keys[k];
 137                                 }
 138                         } else if ( typeof keys === 'string' && typeof value !== 'undefined' ) {
 139                                 messages[keys] = value;
 140                         }
 141                 };
 142                 this.get = function( key, args ) {
 143                         if ( !( key in messages ) ) {
 144                                 return '<' + key + '>';
 145                         }
 146                         var msg = messages[key];
 147                         if ( typeof args == 'object' || typeof args == 'array' ) {
 148                                 for ( var a = 0; a < args.length; a++ ) {
 149                                         msg = msg.replace( '\$' + ( parseInt( a ) + 1 ), args[a] );
 150                                 }
 151                         } else if ( typeof args == 'string' || typeof args == 'number' ) {
 152                                 msg = msg.replace( '$1', args );
 153                         }
 154                         return msg;
 155                 };
 156         } )();
 157         /*
 158          * Client-side module loader which integrates with the MediaWiki ResourceLoader
 159          */
 160         this.loader = new ( function() {
 161
 162                 /* Private Members */
 163
 164                 var that = this;
 165                 /*
 166                  * Mapping of registered modules
 167                  *
 168                  * The jquery module is pre-registered, because it must have already been provided for this object to have
 169                  * been built, and in debug mode jquery would have been provided through a unique loader request, making it
 170                  * impossible to hold back registration of jquery until after mediawiki.
 171                  *
 172                  * Format:
 173                  *      {
 174                  *              'moduleName': {
 175                  *                      'dependencies': ['required module', 'required module', ...], (or) function() {}
 176                  *                      'state': 'registered', 'loading', 'loaded', 'ready', or 'error'
 177                  *                      'script': function() {},
 178                  *                      'style': 'css code string',
 179                  *                      'messages': { 'key': 'value' },
 180                  *                      'version': ############## (unix timestamp)
 181                  *              }
 182                  *      }
 183                  */
 184                 var registry = {};
 185                 // List of modules which will be loaded as when ready
 186                 var batch = [];
 187                 // List of modules to be loaded
 188                 var queue = [];
 189                 // List of callback functions waiting for modules to be ready to be called
 190                 var jobs = [];
 191                 // Flag indicating that requests should be suspended
 192                 var suspended = true;
 193                 // Flag inidicating that document ready has occured
 194                 var ready = false;
 195
 196                 /* Private Methods */
 197
 198                 /**
 199                  * Generates an ISO8601 string from a UNIX timestamp
 200                  */
 201                 function formatVersionNumber( timestamp ) {
 202                         var date = new Date();
 203                         date.setTime( timestamp * 1000 );
 204                         function pad1( n ) {
 205                                 return n < 10 ? '0' + n : n
 206                         }
 207                         function pad2( n ) {
 208                                 return n < 10 ? '00' + n : ( n < 100 ? '0' + n : n );
 209                         }
 210                         return date.getUTCFullYear() + '-' +
 211                                 pad1( date.getUTCMonth() + 1 ) + '-' +
 212                                 pad1( date.getUTCDate() ) + 'T' +
 213                                 pad1( date.getUTCHours() ) + ':' +
 214                                 pad1( date.getUTCMinutes() ) + ':' +
 215                                 pad1( date.getUTCSeconds() ) +
 216                                 'Z';
 217                 }
 218                 /**
 219                  * Recursively resolves dependencies and detects circular references
 220                  */
 221                 function recurse( module, resolved, unresolved ) {
 222                         unresolved[unresolved.length] = module;
 223                         // Resolves dynamic loader function and replaces it with it's own results
 224                         if ( typeof registry[module].dependencies === 'function' ) {
 225                                 registry[module].dependencies = registry[module].dependencies();
 226                                 // Gaurantees the module's dependencies are always in an array
 227                                 if ( typeof registry[module].dependencies !== 'object' ) {
 228                                         registry[module].dependencies = [registry[module].dependencies];
 229                                 }
 230                         }
 231                         // Tracks down dependencies
 232                         for ( var n = 0; n < registry[module].dependencies.length; n++ ) {
 233                                 if ( resolved.indexOf( registry[module].dependencies[n] ) === -1 ) {
 234                                         if ( unresolved.indexOf( registry[module].dependencies[n] ) !== -1 ) {
 235                                                 throw new Error(
 236                                                         'Circular reference detected: ' + module + ' -> ' + registry[module].dependencies[n]
 237                                                 );
 238                                         }
 239                                         recurse( registry[module].dependencies[n], resolved, unresolved );
 240                                 }
 241                         }
 242                         resolved[resolved.length] = module;
 243                         unresolved.splice( unresolved.indexOf( module ), 1 );
 244                 }
 245                 /**
 246                  * Gets a list of modules names that a module dependencies in their proper dependency order
 247                  *
 248                  * @param mixed string module name or array of string module names
 249                  * @return list of dependencies
 250                  * @throws Error if circular reference is detected
 251                  */
 252                 function resolve( module, resolved, unresolved ) {
 253                         // Allow calling with an array of module names
 254                         if ( typeof module === 'object' ) {
 255                                 var modules = [];
 256                                 for ( var m = 0; m < module.length; m++ ) {
 257                                         var dependencies = resolve( module[m] );
 258                                         for ( var n = 0; n < dependencies.length; n++ ) {
 259                                                 modules[modules.length] = dependencies[n];
 260                                         }
 261                                 }
 262                                 return modules;
 263                         } else if ( typeof module === 'string' ) {
 264                                 // Undefined modules have no dependencies
 265                                 if ( !( module in registry ) ) {
 266                                         return [];
 267                                 }
 268                                 var resolved = [];
 269                                 recurse( module, resolved, [] );
 270                                 return resolved;
 271                         }
 272                         throw new Error( 'Invalid module argument: ' + module );
 273                 };
 274                 /**
 275                  * Narrows a list of module names down to those matching a specific state. Possible states are 'undefined',
 276                  * 'registered', 'loading', 'loaded', or 'ready'
 277                  *
 278                  * @param mixed string or array of strings of module states to filter by
 279                  * @param array list of module names to filter (optional, all modules will be used by default)
 280                  * @return array list of filtered module names
 281                  */
 282                 function filter( states, modules ) {
 283                         // Allow states to be given as a string
 284                         if ( typeof states === 'string' ) {
 285                                 states = [states];
 286                         }
 287                         // If called without a list of modules, build and use a list of all modules
 288                         var list = [];
 289                         if ( typeof modules === 'undefined' ) {
 290                                 modules = [];
 291                                 for ( module in registry ) {
 292                                         modules[modules.length] = module;
 293                                 }
 294                         }
 295                         // Build a list of modules which are in one of the specified states
 296                         for ( var s = 0; s < states.length; s++ ) {
 297                                 for ( var m = 0; m < modules.length; m++ ) {
 298                                         if (
 299                                                 ( states[s] == 'undefined' && typeof registry[modules[m]] === 'undefined' ) ||
 300                                                 ( typeof registry[modules[m]] === 'object' && registry[modules[m]].state === states[s] )
 301                                         ) {
 302                                                 list[list.length] = modules[m];
 303                                         }
 304                                 }
 305                         }
 306                         return list;
 307                 }
 308                 /**
 309                  * Executes a loaded module, making it ready to use
 310                  *
 311                  * @param string module name to execute
 312                  */
 313                 function execute( module ) {
 314                         if ( typeof registry[module] === 'undefined' ) {
 315                                 throw new Error( 'Module has not been registered yet: ' + module );
 316                         } else if ( registry[module].state === 'registered' ) {
 317                                 throw new Error( 'Module has not been requested from the server yet: ' + module );
 318                         } else if ( registry[module].state === 'loading' ) {
 319                                 throw new Error( 'Module has not completed loading yet: ' + module );
 320                         } else if ( registry[module].state === 'ready' ) {
 321                                 throw new Error( 'Module has already been loaded: ' + module );
 322                         }
 323                         // Add style sheet to document
 324                         if ( typeof registry[module].style === 'string' && registry[module].style.length ) {
 325                                 $( 'head' ).append( '<style type="text/css">' + registry[module].style + '</style>' );
 326                         } else if ( typeof registry[module].style === 'object' ) {
 327                                 for ( var media in registry[module].style ) {
 328                                         $( 'head' ).append(
 329                                                 '<style type="text/css" media="' + media + '">' + registry[module].style[media] + '</style>'
 330                                         );
 331                                 }
 332                         }
 333                         // Add localizations to message system
 334                         if ( typeof registry[module].messages === 'object' ) {
 335                                 mediaWiki.msg.set( registry[module].messages );
 336                         }
 337                         // Execute script
 338                         try {
 339                                 registry[module].script();
 340                                 registry[module].state = 'ready';
 341                                 // Run jobs who's dependencies have just been met
 342                                 for ( var j = 0; j < jobs.length; j++ ) {
 343                                         if ( filter( 'ready', jobs[j].dependencies ).compare( jobs[j].dependencies ) ) {
 344                                                 if ( typeof jobs[j].ready === 'function' ) {
 345                                                         jobs[j].ready();
 346                                                 }
 347                                                 jobs.splice( j, 1 );
 348                                                 j--;
 349                                         }
 350                                 }
 351                                 // Execute modules who's dependencies have just been met
 352                                 for ( r in registry ) {
 353                                         if ( registry[r].state == 'loaded' ) {
 354                                                 if ( filter( ['ready'], registry[r].dependencies ).compare( registry[r].dependencies ) ) {
 355                                                         execute( r );
 356                                                 }
 357                                         }
 358                                 }
 359                         } catch ( e ) {
 360                                 mediaWiki.log( 'Exception thrown by ' + module + ': ' + e.message );
 361                                 mediaWiki.log( e );
 362                                 registry[module].state = 'error';
 363                                 // Run error callbacks of jobs affected by this condition
 364                                 for ( var j = 0; j < jobs.length; j++ ) {
 365                                         if ( jobs[j].dependencies.indexOf( module ) !== -1 ) {
 366                                                 if ( typeof jobs[j].error === 'function' ) {
 367                                                         jobs[j].error();
 368                                                 }
 369                                                 jobs.splice( j, 1 );
 370                                                 j--;
 371                                         }
 372                                 }
 373                         }
 374                 }
 375                 /**
 376                  * Adds a dependencies to the queue with optional callbacks to be run when the dependencies are ready or fail
 377                  *
 378                  * @param mixed string moulde name or array of string module names
 379                  * @param function ready callback to execute when all dependencies are ready
 380                  * @param function error callback to execute when any dependency fails
 381                  */
 382                 function request( dependencies, ready, error ) {
 383                         // Allow calling by single module name
 384                         if ( typeof dependencies === 'string' ) {
 385                                 dependencies = [dependencies];
 386                                 if ( dependencies[0] in registry ) {
 387                                         for ( var n = 0; n < registry[dependencies[0]].dependencies.length; n++ ) {
 388                                                 dependencies[dependencies.length] = registry[dependencies[0]].dependencies[n];
 389                                         }
 390                                 }
 391                         }
 392                         // Add ready and error callbacks if they were given
 393                         if ( arguments.length > 1 ) {
 394                                 jobs[jobs.length] = {
 395                                         'dependencies': filter( ['undefined', 'registered', 'loading', 'loaded'], dependencies ),
 396                                         'ready': ready,
 397                                         'error': error
 398                                 };
 399                         }
 400                         // Queue up any dependencies that are undefined or registered
 401                         dependencies = filter( ['undefined', 'registered'], dependencies );
 402                         for ( var n = 0; n < dependencies.length; n++ ) {
 403                                 if ( queue.indexOf( dependencies[n] ) === -1 ) {
 404                                         queue[queue.length] = dependencies[n];
 405                                 }
 406                         }
 407                         // Work the queue
 408                         that.work();
 409                 }
 410
 411                 function sortQuery(o) {
 412                         var sorted = {}, key, a = [];
 413                         for ( key in o ) {
 414                                 if ( o.hasOwnProperty( key ) ) {
 415                                         a.push( key );
 416                                 }
 417                         }
 418                         a.sort();
 419                         for ( key = 0; key < a.length; key++ ) {
 420                                 sorted[a[key]] = o[a[key]];
 421                         }
 422                         return sorted;
 423                 }
 424
 425                 /* Public Methods */
 426
 427                 /**
 428                  * Requests dependencies from server, loading and executing when things when ready.
 429                  */
 430                 this.work = function() {
 431                         // Appends a list of modules to the batch
 432                         for ( var q = 0; q < queue.length; q++ ) {
 433                                 // Only request modules which are undefined or registered
 434                                 if ( !( queue[q] in registry ) || registry[queue[q]].state == 'registered' ) {
 435                                         // Prevent duplicate entries
 436                                         if ( batch.indexOf( queue[q] ) === -1 ) {
 437                                                 batch[batch.length] = queue[q];
 438                                                 // Mark registered modules as loading
 439                                                 if ( queue[q] in registry ) {
 440                                                         registry[queue[q]].state = 'loading';
 441                                                 }
 442                                         }
 443                                 }
 444                         }
 445                         // Clean up the queue
 446                         queue = [];
 447                         // After document ready, handle the batch
 448                         if ( !suspended && batch.length ) {
 449                                 // Always order modules alphabetically to help reduce cache misses for otherwise identical content
 450                                 batch.sort();
 451                                 // Build a list of request parameters
 452                                 var base = {
 453                                         'skin': mediaWiki.config.get( 'skin' ),
 454                                         'lang': mediaWiki.config.get( 'wgUserLanguage' ),
 455                                         'debug': mediaWiki.config.get( 'debug' )
 456                                 };
 457                                 // Extend request parameters with a list of modules in the batch
 458                                 var requests = [];
 459                                 if ( base.debug == '1' ) {
 460                                         for ( var b = 0; b < batch.length; b++ ) {
 461                                                 requests[requests.length] = $.extend(
 462                                                         { 'modules': batch[b], 'version': registry[batch[b]].version }, base
 463                                                 );
 464                                         }
 465                                 } else {
 466                                         // Calculate the highest timestamp
 467                                         var version = 0;
 468                                         for ( var b = 0; b < batch.length; b++ ) {
 469                                                 if ( registry[batch[b]].version > version ) {
 470                                                         version = registry[batch[b]].version;
 471                                                 }
 472                                         }
 473                                         requests[requests.length] = $.extend(
 474                                                 { 'modules': batch.join( '|' ), 'version': formatVersionNumber( version ) }, base
 475                                         );
 476                                 }
 477                                 // Clear the batch - this MUST happen before we append the script element to the body or it's
 478                                 // possible that the script will be locally cached, instantly load, and work the batch again,
 479                                 // all before we've cleared it causing each request to include modules which are already loaded
 480                                 batch = [];
 481                                 // Asynchronously append a script tag to the end of the body
 482                                 function request() {
 483                                         var html = '';
 484                                         for ( var r = 0; r < requests.length; r++ ) {
 485                                                 requests[r] = sortQuery( requests[r] );
 486                                                 // Build out the HTML
 487                                                 var src = mediaWiki.config.get( 'wgLoadScript' ) + '?' + $.param( requests[r] );
 488                                                 html += '<script type="text/javascript" src="' + src + '"></script>';
 489                                         }
 490                                         return html;
 491                                 }
 492                                 // Load asynchronously after doumument ready
 493                                 if ( ready ) {
 494                                         setTimeout(  function() { $( 'body' ).append( request() ); }, 0 )
 495                                 } else {
 496                                         document.write( request() );
 497                                 }
 498                         }
 499                 };
 500                 /**
 501                  * Registers a module, letting the system know about it and it's dependencies. loader.js files contain calls
 502                  * to this function.
 503                  */
 504                 this.register = function( module, version, dependencies, status ) {
 505                         // Allow multiple registration
 506                         if ( typeof module === 'object' ) {
 507                                 for ( var m = 0; m < module.length; m++ ) {
 508                                         if ( typeof module[m] === 'string' ) {
 509                                                 that.register( module[m] );
 510                                         } else if ( typeof module[m] === 'object' ) {
 511                                                 that.register.apply( that, module[m] );
 512                                         }
 513                                 }
 514                                 return;
 515                         }
 516                         // Validate input
 517                         if ( typeof module !== 'string' ) {
 518                                 throw new Error( 'module must be a string, not a ' + typeof module );
 519                         }
 520                         if ( typeof registry[module] !== 'undefined' && typeof status === 'undefined' ) {
 521                                 throw new Error( 'module already implemeneted: ' + module );
 522                         }
 523                         // List the module as registered
 524                         registry[module] = {
 525                                 'state': typeof status === 'string' ? status : 'registered',
 526                                 'dependencies': [],
 527                                 'version': typeof version !== 'undefined' ? parseInt( version ) : 0
 528                         };
 529                         if ( typeof dependencies === 'string' ) {
 530                                 // Allow dependencies to be given as a single module name
 531                                 registry[module].dependencies = [dependencies];
 532                         } else if ( typeof dependencies === 'object' || typeof dependencies === 'function' ) {
 533                                 // Allow dependencies to be given as an array of module names or a function which returns an array
 534                                 registry[module].dependencies = dependencies;
 535                         }
 536                 };
 537                 /**
 538                  * Implements a module, giving the system a course of action to take upon loading. Results of a request for
 539                  * one or more modules contain calls to this function.
 540                  */
 541                 this.implement = function( module, script, style, localization ) {
 542                         // Automaically register module
 543                         if ( typeof registry[module] === 'undefined' ) {
 544                                 that.register( module );
 545                         }
 546                         // Validate input
 547                         if ( typeof script !== 'function' ) {
 548                                 throw new Error( 'script must be a function, not a ' + typeof script );
 549                         }
 550                         if ( typeof style !== 'undefined' && typeof style !== 'string' && typeof style !== 'object' ) {
 551                                 throw new Error( 'style must be a string or object, not a ' + typeof style );
 552                         }
 553                         if ( typeof localization !== 'undefined' && typeof localization !== 'object' ) {
 554                                 throw new Error( 'localization must be an object, not a ' + typeof localization );
 555                         }
 556                         if ( typeof registry[module] !== 'undefined' && typeof registry[module].script !== 'undefined' ) {
 557                                 throw new Error( 'module already implemeneted: ' + module );
 558                         }
 559                         // Mark module as loaded
 560                         registry[module].state = 'loaded';
 561                         // Attach components
 562                         registry[module].script = script;
 563                         if ( typeof style === 'string' || typeof style === 'object' ) {
 564                                 registry[module].style = style;
 565                         }
 566                         if ( typeof localization === 'object' ) {
 567                                 registry[module].messages = localization;
 568                         }
 569                         // Execute or queue callback
 570                         if ( filter( ['ready'], registry[module].dependencies ).compare( registry[module].dependencies ) ) {
 571                                 execute( module );
 572                         } else {
 573                                 request( module );
 574                         }
 575                 };
 576                 /**
 577                  * Executes a function as soon as one or more required modules are ready
 578                  *
 579                  * @param mixed string or array of strings of modules names the callback dependencies to be ready before
 580                  * executing
 581                  * @param function callback to execute when all dependencies are ready (optional)
 582                  * @param function callback to execute when if dependencies have a errors (optional)
 583                  */
 584                 this.using = function( dependencies, ready, error ) {
 585                         // Validate input
 586                         if ( typeof dependencies !== 'object' && typeof dependencies !== 'string' ) {
 587                                 throw new Error( 'dependencies must be a string or an array, not a ' + typeof dependencies )
 588                         }
 589                         // Allow calling with a single dependency as a string
 590                         if ( typeof dependencies === 'string' ) {
 591                                 dependencies = [dependencies];
 592                         }
 593                         // Resolve entire dependency map
 594                         dependencies = resolve( dependencies );
 595                         // If all dependencies are met, execute ready immediately
 596                         if ( filter( ['ready'], dependencies ).compare( dependencies ) ) {
 597                                 if ( typeof ready !== 'function' ) {
 598                                         ready();
 599                                 }
 600                         }
 601                         // If any dependencies have errors execute error immediately
 602                         else if ( filter( ['error'], dependencies ).length ) {
 603                                 if ( typeof error === 'function' ) {
 604                                         error();
 605                                 }
 606                         }
 607                         // Since some dependencies are not yet ready, queue up a request
 608                         else {
 609                                 request( dependencies, ready, error );
 610                         }
 611                 };
 612                 /**
 613                  * Loads one or more modules for future use
 614                  */
 615                 this.load = function( modules ) {
 616                         // Validate input
 617                         if ( typeof modules !== 'object' && typeof modules !== 'string' ) {
 618                                 throw new Error( 'dependencies must be a string or an array, not a ' + typeof dependencies )
 619                         }
 620                         // Allow calling with a single dependency as a string
 621                         if ( typeof modules === 'string' ) {
 622                                 modules = [modules];
 623                         }
 624                         // Resolve entire dependency map
 625                         modules = resolve( modules );
 626                         // If all modules are ready, nothing dependency be done
 627                         if ( filter( ['ready'], modules ).compare( modules ) ) {
 628                                 return true;
 629                         }
 630                         // If any modules have errors return false
 631                         else if ( filter( ['error'], modules ).length ) {
 632                                 return false;
 633                         }
 634                         // Since some modules are not yet ready, queue up a request
 635                         else {
 636                                 request( modules );
 637                                 return true;
 638                         }
 639                 };
 640                 /**
 641                  * Flushes the request queue and begin executing load requests on demand
 642                  */
 643                 this.go = function() {
 644                         suspended = false;
 645                         that.work();
 646                 };
 647                 /**
 648                  * Changes the state of a module
 649                  *
 650                  * @param mixed module string module name or object of module name/state pairs
 651                  * @param string state string state name
 652                  */
 653                 this.state = function( module, state ) {
 654                         if ( typeof module === 'object' ) {
 655                                 for ( var m in module ) {
 656                                         that.state( m, module[m] );
 657                                 }
 658                                 return;
 659                         }
 660                         if ( module in registry ) {
 661                                 registry[module].state = state;
 662                         }
 663                 };
 664
 665                 /* Cache document ready status */
 666
 667                 $(document).ready( function() { ready = true; } );
 668         } )();
 669
 670         /* Extension points */
 671
 672         this.util = {};
 673         this.legacy = {};
 674
 675 } )( jQuery );
 676
 677
 678 /* Auto-register from pre-loaded startup scripts */
 679
 680 if ( typeof window['startUp'] === 'function' ) {
 681         window['startUp']();
 682         delete window['startUp'];
 683 }