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MediaWiki 1.17.0
[autoinstallsdev/mediawiki.git] / resources / mediawiki / mediawiki.js
diff --git a/resources/mediawiki/mediawiki.js b/resources/mediawiki/mediawiki.js
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+/*
+ * JavaScript backwards-compatibility alternatives and other convenience functions
+ */
+
+jQuery.extend({
+       trimLeft : function( str ) {
+               return str == null ? '' : str.toString().replace( /^\s+/, '' );
+       },
+       trimRight : function( str ) {
+               return str == null ?
+                               '' : str.toString().replace( /\s+$/, '' );
+       },
+       ucFirst : function( str ) {
+               return str.substr( 0, 1 ).toUpperCase() + str.substr( 1, str.length );
+       },
+       escapeRE : function( str ) {
+               return str.replace ( /([\\{}()\|.?*+-^$\[\]])/g, "\\$1" );
+       },
+       isEmpty : function( v ) {
+               var key;
+               if ( v === "" || v === 0 || v === "0" || v === null
+                       || v === false || typeof v === 'undefined' )
+               {
+                       return true;
+               }
+               // the for-loop could potentially contain prototypes
+               // to avoid that we check it's length first
+               if ( v.length === 0 ) {
+                       return true;
+               }
+               if ( typeof v === 'object' ) {
+                       for ( key in v ) {
+                               return false;
+                       }
+                       return true;
+               }
+               return false;
+       },
+       compareArray : function( arrThis, arrAgainst ) {
+               if ( arrThis.length != arrAgainst.length ) {
+                       return false;
+               }
+               for ( var i = 0; i < arrThis.length; i++ ) {
+                       if ( arrThis[i] instanceof Array ) {
+                               if ( !$.compareArray( arrThis[i], arrAgainst[i] ) ) {
+                                       return false;
+                               }
+                       } else if ( arrThis[i] !== arrAgainst[i] ) {
+                               return false;
+                       }
+               }
+               return true;
+       }
+});
+
+/*
+ * Core MediaWiki JavaScript Library
+ */
+
+// Attach to window
+window.mediaWiki = new ( function( $ ) {
+
+       /* Constants */
+
+       // This will not change until we are 100% ready to turn off legacy globals
+       var LEGACY_GLOBALS = true;
+
+       /* Private Members */
+
+       // List of messages that have been requested to be loaded
+       var messageQueue = {};
+
+       /* Prototypes */
+
+       /**
+        * An object which allows single and multiple get/set/exists functionality
+        * on a list of key / value pairs.
+        *
+        * @param {boolean} global Whether to get/set/exists values on the window
+        *   object or a private object
+        */
+       function Map( global ) {
+               this.values = ( global === true ) ? window : {};
+       };
+
+       /**
+        * Gets the value of a key, or a list of key/value pairs for an array of keys.
+        *
+        * If called with no arguments, all values will be returned.
+        *
+        * @param selection mixed Key or array of keys to get values for
+        * @param fallback mixed Value to use in case key(s) do not exist (optional)
+        */
+       Map.prototype.get = function( selection, fallback ) {
+               if ( typeof selection === 'object' ) {
+                       selection = $.makeArray( selection );
+                       var results = {};
+                       for ( var i = 0; i < selection.length; i++ ) {
+                               results[selection[i]] = this.get( selection[i], fallback );
+                       }
+                       return results;
+               } else if ( typeof selection === 'string' ) {
+                       if ( typeof this.values[selection] === 'undefined' ) {
+                               if ( typeof fallback !== 'undefined' ) {
+                                       return fallback;
+                               }
+                               return null;
+                       }
+                       return this.values[selection];
+               }
+               return this.values;
+       };
+
+       /**
+        * Sets one or multiple key/value pairs.
+        *
+        * @param selection mixed Key or object of key/value pairs to set
+        * @param value mixed Value to set (optional, only in use when key is a string)
+        */
+       Map.prototype.set = function( selection, value ) {
+               if ( typeof selection === 'object' ) {
+                       for ( var s in selection ) {
+                               this.values[s] = selection[s];
+                       }
+               } else if ( typeof selection === 'string' && typeof value !== 'undefined' ) {
+                       this.values[selection] = value;
+               }
+       };
+
+       /**
+        * Checks if one or multiple keys exist.
+        *
+        * @param selection mixed Key or array of keys to check
+        * @return boolean Existence of key(s)
+        */
+       Map.prototype.exists = function( selection ) {
+               if ( typeof keys === 'object' ) {
+                       for ( var s = 0; s < selection.length; s++ ) {
+                               if ( !( selection[s] in this.values ) ) {
+                                       return false;
+                               }
+                       }
+                       return true;
+               } else {
+                       return selection in this.values;
+               }
+       };
+
+       /**
+        * Message object, similar to Message in PHP
+        */
+       function Message( map, key, parameters ) {
+               this.format = 'parse';
+               this.map = map;
+               this.key = key;
+               this.parameters = typeof parameters === 'undefined' ? [] : $.makeArray( parameters );
+       };
+
+       /**
+        * Appends parameters for replacement
+        *
+        * @param parameters mixed First in a list of variadic arguments to append as message parameters
+        */
+       Message.prototype.params = function( parameters ) {
+               for ( var i = 0; i < parameters.length; i++ ) {
+                       this.parameters[this.parameters.length] = parameters[i];
+               }
+               return this;
+       };
+
+       /**
+        * Converts message object to it's string form based on the state of format
+        *
+        * @return {string} String form of message
+        */
+       Message.prototype.toString = function() {
+               if ( !this.map.exists( this.key ) ) {
+                       // Return <key> if key does not exist
+                       return '<' + this.key + '>';
+               }
+               var text = this.map.get( this.key );
+               var parameters = this.parameters;
+               text = text.replace( /\$(\d+)/g, function( string, match ) {
+                       var index = parseInt( match, 10 ) - 1;
+                       return index in parameters ? parameters[index] : '$' + match;
+               } );
+               /* This should be fixed up when we have a parser
+               if ( this.format === 'parse' && 'language' in mediaWiki ) {
+                       text = mediaWiki.language.parse( text );
+               }
+               */
+               return text;
+       };
+
+       /**
+        * Changes format to parse and converts message to string
+        *
+        * @return {string} String form of parsed message
+        */
+       Message.prototype.parse = function() {
+               this.format = 'parse';
+               return this.toString();
+       };
+
+       /**
+        * Changes format to plain and converts message to string
+        *
+        * @return {string} String form of plain message
+        */
+       Message.prototype.plain = function() {
+               this.format = 'plain';
+               return this.toString();
+       };
+
+       /**
+        * Checks if message exists
+        *
+        * @return {string} String form of parsed message
+        */
+       Message.prototype.exists = function() {
+               return this.map.exists( this.key );
+       };
+
+       /**
+        * User object
+        */
+       function User() {
+               this.options = new Map();
+
+               /* Public Methods */
+
+               /*
+                * Generates a random user session ID (32 alpha-numeric characters).
+                * 
+                * This information would potentially be stored in a cookie to identify a user during a
+                * session or series of sessions. It's uniqueness should not be depended on.
+                * 
+                * @return string random set of 32 alpha-numeric characters
+                */
+               function generateId() {
+                       var id = '';
+                       var seed = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz';
+                       for ( var i = 0, r; i < 32; i++ ) {
+                               r = Math.floor( Math.random() * seed.length );
+                               id += seed.substring( r, r + 1 );
+                       }
+                       return id;
+               }
+
+               /*
+                * Gets the current user's name.
+                * 
+                * @return mixed user name string or null if users is anonymous
+                */
+               this.name = function() {
+                       return mediaWiki.config.get( 'wgUserName' );
+               };
+
+               /*
+                * Gets a random session ID automatically generated and kept in a cookie.
+                * 
+                * This ID is ephemeral for everyone, staying in their browser only until they close
+                * their browser.
+                * 
+                * Do not use this method before the first call to mediaWiki.loader.go(), it depends on
+                * jquery.cookie, which is added to the first pay-load just after mediaWiki is defined, but
+                * won't be loaded until the first call to go().
+                * 
+                * @return string user name or random session ID
+                */
+               this.sessionId = function () {
+                       var sessionId = $.cookie( 'mediaWiki.user.sessionId' );
+                       if ( typeof sessionId == 'undefined' || sessionId == null ) {
+                               sessionId = generateId();
+                               $.cookie( 'mediaWiki.user.sessionId', sessionId, { 'expires': null, 'path': '/' } );
+                       }
+                       return sessionId;
+               };
+
+               /*
+                * Gets the current user's name or a random ID automatically generated and kept in a cookie.
+                * 
+                * This ID is persistent for anonymous users, staying in their browser up to 1 year. The
+                * expiration time is reset each time the ID is queried, so in most cases this ID will
+                * persist until the browser's cookies are cleared or the user doesn't visit for 1 year.
+                * 
+                * Do not use this method before the first call to mediaWiki.loader.go(), it depends on
+                * jquery.cookie, which is added to the first pay-load just after mediaWiki is defined, but
+                * won't be loaded until the first call to go().
+                * 
+                * @return string user name or random session ID
+                */
+               this.id = function() {
+                       var name = that.name();
+                       if ( name ) {
+                               return name;
+                       }
+                       var id = $.cookie( 'mediaWiki.user.id' );
+                       if ( typeof id == 'undefined' || id == null ) {
+                               id = generateId();
+                       }
+                       // Set cookie if not set, or renew it if already set
+                       $.cookie( 'mediaWiki.user.id', id, { 'expires': 365, 'path': '/' } );
+                       return id;
+               };
+       }
+
+       /* Public Members */
+
+       /*
+        * Dummy function which in debug mode can be replaced with a function that
+        * does something clever
+        */
+       this.log = function() { };
+
+       /*
+        * List of configuration values
+        *
+        * In legacy mode the values this object wraps will be in the global space
+        */
+       this.config = new Map( LEGACY_GLOBALS );
+
+       /*
+        * Information about the current user
+        */
+       this.user = new User();
+
+       /*
+        * Localization system
+        */
+       this.messages = new Map();
+
+       /* Public Methods */
+
+       /**
+        * Gets a message object, similar to wfMessage()
+        *
+        * @param key string Key of message to get
+        * @param parameters mixed First argument in a list of variadic arguments, each a parameter for $
+        * replacement
+        */
+       this.message = function( key, parameters ) {
+               // Support variadic arguments
+               if ( typeof parameters !== 'undefined' ) {
+                       parameters = $.makeArray( arguments );
+                       parameters.shift();
+               } else {
+                       parameters = [];
+               }
+               return new Message( mediaWiki.messages, key, parameters );
+       };
+
+       /**
+        * Gets a message string, similar to wfMsg()
+        *
+        * @param key string Key of message to get
+        * @param parameters mixed First argument in a list of variadic arguments, each a parameter for $
+        * replacement
+        */
+       this.msg = function( key, parameters ) {
+               return mediaWiki.message.apply( mediaWiki.message, arguments ).toString();
+       };
+
+       /**
+        * Client-side module loader which integrates with the MediaWiki ResourceLoader
+        */
+       this.loader = new ( function() {
+
+               /* Private Members */
+
+               /**
+                * Mapping of registered modules
+                *
+                * The jquery module is pre-registered, because it must have already
+                * been provided for this object to have been built, and in debug mode
+                * jquery would have been provided through a unique loader request,
+                * making it impossible to hold back registration of jquery until after
+                * mediawiki.
+                *
+                * Format:
+                *      {
+                *              'moduleName': {
+                *                      'dependencies': ['required module', 'required module', ...], (or) function() {}
+                *                      'state': 'registered', 'loading', 'loaded', 'ready', or 'error'
+                *                      'script': function() {},
+                *                      'style': 'css code string',
+                *                      'messages': { 'key': 'value' },
+                *                      'version': ############## (unix timestamp)
+                *              }
+                *      }
+                */
+               var registry = {};
+               // List of modules which will be loaded as when ready
+               var batch = [];
+               // List of modules to be loaded
+               var queue = [];
+               // List of callback functions waiting for modules to be ready to be called
+               var jobs = [];
+               // Flag indicating that requests should be suspended
+               var suspended = true;
+               // Flag inidicating that document ready has occured
+               var ready = false;
+               // Marker element for adding dynamic styles
+               var $marker = $( 'head meta[name=ResourceLoaderDynamicStyles]' );
+
+               /* Private Methods */
+
+               function compare( a, b ) {
+                       if ( a.length != b.length ) {
+                               return false;
+                       }
+                       for ( var i = 0; i < b.length; i++ ) {
+                               if ( $.isArray( a[i] ) ) {
+                                       if ( !compare( a[i], b[i] ) ) {
+                                               return false;
+                                       }
+                               }
+                               if ( a[i] !== b[i] ) {
+                                       return false;
+                               }
+                       }
+                       return true;
+               };
+
+               /**
+                * Generates an ISO8601 "basic" string from a UNIX timestamp
+                */
+               function formatVersionNumber( timestamp ) {
+                       function pad( a, b, c ) {
+                               return [a < 10 ? '0' + a : a, b < 10 ? '0' + b : b, c < 10 ? '0' + c : c].join( '' );
+                       }
+                       var d = new Date();
+                       d.setTime( timestamp * 1000 );
+                       return [
+                               pad( d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate() ), 'T',
+                               pad( d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds() ), 'Z'
+                       ].join( '' );
+               }
+
+               /**
+                * Recursively resolves dependencies and detects circular references
+                */
+               function recurse( module, resolved, unresolved ) {
+                       if ( typeof registry[module] === 'undefined' ) {
+                               throw new Error( 'Unknown dependency: ' + module );
+                       }
+                       // Resolves dynamic loader function and replaces it with its own results
+                       if ( typeof registry[module].dependencies === 'function' ) {
+                               registry[module].dependencies = registry[module].dependencies();
+                               // Ensures the module's dependencies are always in an array
+                               if ( typeof registry[module].dependencies !== 'object' ) {
+                                       registry[module].dependencies = [registry[module].dependencies];
+                               }
+                       }
+                       // Tracks down dependencies
+                       for ( var n = 0; n < registry[module].dependencies.length; n++ ) {
+                               if ( $.inArray( registry[module].dependencies[n], resolved ) === -1 ) {
+                                       if ( $.inArray( registry[module].dependencies[n], unresolved ) !== -1 ) {
+                                               throw new Error(
+                                                       'Circular reference detected: ' + module +
+                                                       ' -> ' + registry[module].dependencies[n]
+                                               );
+                                       }
+                                       recurse( registry[module].dependencies[n], resolved, unresolved );
+                               }
+                       }
+                       resolved[resolved.length] = module;
+                       unresolved.splice( $.inArray( module, unresolved ), 1 );
+               }
+
+               /**
+                * Gets a list of module names that a module depends on in their proper dependency order
+                *
+                * @param module string module name or array of string module names
+                * @return list of dependencies
+                * @throws Error if circular reference is detected
+                */
+               function resolve( module, resolved, unresolved ) {
+                       // Allow calling with an array of module names
+                       if ( typeof module === 'object' ) {
+                               var modules = [];
+                               for ( var m = 0; m < module.length; m++ ) {
+                                       var dependencies = resolve( module[m] );
+                                       for ( var n = 0; n < dependencies.length; n++ ) {
+                                               modules[modules.length] = dependencies[n];
+                                       }
+                               }
+                               return modules;
+                       } else if ( typeof module === 'string' ) {
+                               // Undefined modules have no dependencies
+                               if ( !( module in registry ) ) {
+                                       return [];
+                               }
+                               var resolved = [];
+                               recurse( module, resolved, [] );
+                               return resolved;
+                       }
+                       throw new Error( 'Invalid module argument: ' + module );
+               };
+
+               /**
+                * Narrows a list of module names down to those matching a specific
+                * state. Possible states are 'undefined', 'registered', 'loading',
+                * 'loaded', or 'ready'
+                *
+                * @param states string or array of strings of module states to filter by
+                * @param modules array list of module names to filter (optional, all modules
+                *   will be used by default)
+                * @return array list of filtered module names
+                */
+               function filter( states, modules ) {
+                       // Allow states to be given as a string
+                       if ( typeof states === 'string' ) {
+                               states = [states];
+                       }
+                       // If called without a list of modules, build and use a list of all modules
+                       var list = [];
+                       if ( typeof modules === 'undefined' ) {
+                               modules = [];
+                               for ( module in registry ) {
+                                       modules[modules.length] = module;
+                               }
+                       }
+                       // Build a list of modules which are in one of the specified states
+                       for ( var s = 0; s < states.length; s++ ) {
+                               for ( var m = 0; m < modules.length; m++ ) {
+                                       if ( typeof registry[modules[m]] === 'undefined' ) {
+                                               // Module does not exist
+                                               if ( states[s] == 'undefined' ) {
+                                                       // OK, undefined
+                                                       list[list.length] = modules[m];
+                                               }
+                                       } else {
+                                               // Module exists, check state
+                                               if ( registry[modules[m]].state === states[s] ) {
+                                                       // OK, correct state
+                                                       list[list.length] = modules[m];
+                                               }
+                                       }
+                               }
+                       }
+                       return list;
+               }
+
+               /**
+                * Executes a loaded module, making it ready to use
+                *
+                * @param module string module name to execute
+                */
+               function execute( module ) {
+                       if ( typeof registry[module] === 'undefined' ) {
+                               throw new Error( 'Module has not been registered yet: ' + module );
+                       } else if ( registry[module].state === 'registered' ) {
+                               throw new Error( 'Module has not been requested from the server yet: ' + module );
+                       } else if ( registry[module].state === 'loading' ) {
+                               throw new Error( 'Module has not completed loading yet: ' + module );
+                       } else if ( registry[module].state === 'ready' ) {
+                               throw new Error( 'Module has already been loaded: ' + module );
+                       }
+                       // Add style sheet to document
+                       if ( typeof registry[module].style === 'string' && registry[module].style.length ) {
+                               $marker.before( mediaWiki.html.element( 'style',
+                                               { type: 'text/css' },
+                                               new mediaWiki.html.Cdata( registry[module].style )
+                                       ) );
+                       } else if ( typeof registry[module].style === 'object'
+                               && !( registry[module].style instanceof Array ) )
+                       {
+                               for ( var media in registry[module].style ) {
+                                       $marker.before( mediaWiki.html.element( 'style',
+                                               { type: 'text/css', media: media },
+                                               new mediaWiki.html.Cdata( registry[module].style[media] )
+                                       ) );
+                               }
+                       }
+                       // Add localizations to message system
+                       if ( typeof registry[module].messages === 'object' ) {
+                               mediaWiki.messages.set( registry[module].messages );
+                       }
+                       // Execute script
+                       try {
+                               registry[module].script( jQuery, mediaWiki );
+                               registry[module].state = 'ready';
+                               // Run jobs who's dependencies have just been met
+                               for ( var j = 0; j < jobs.length; j++ ) {
+                                       if ( compare(
+                                               filter( 'ready', jobs[j].dependencies ),
+                                               jobs[j].dependencies ) )
+                                       {
+                                               if ( typeof jobs[j].ready === 'function' ) {
+                                                       jobs[j].ready();
+                                               }
+                                               jobs.splice( j, 1 );
+                                               j--;
+                                       }
+                               }
+                               // Execute modules who's dependencies have just been met
+                               for ( r in registry ) {
+                                       if ( registry[r].state == 'loaded' ) {
+                                               if ( compare(
+                                                       filter( ['ready'], registry[r].dependencies ),
+                                                       registry[r].dependencies ) )
+                                               {
+                                                       execute( r );
+                                               }
+                                       }
+                               }
+                       } catch ( e ) {
+                               mediaWiki.log( 'Exception thrown by ' + module + ': ' + e.message );
+                               mediaWiki.log( e );
+                               registry[module].state = 'error';
+                               // Run error callbacks of jobs affected by this condition
+                               for ( var j = 0; j < jobs.length; j++ ) {
+                                       if ( $.inArray( module, jobs[j].dependencies ) !== -1 ) {
+                                               if ( typeof jobs[j].error === 'function' ) {
+                                                       jobs[j].error();
+                                               }
+                                               jobs.splice( j, 1 );
+                                               j--;
+                                       }
+                               }
+                       }
+               }
+
+               /**
+                * Adds a dependencies to the queue with optional callbacks to be run
+                * when the dependencies are ready or fail
+                *
+                * @param dependencies string module name or array of string module names
+                * @param ready function callback to execute when all dependencies are ready
+                * @param error function callback to execute when any dependency fails
+                */
+               function request( dependencies, ready, error ) {
+                       // Allow calling by single module name
+                       if ( typeof dependencies === 'string' ) {
+                               dependencies = [dependencies];
+                               if ( dependencies[0] in registry ) {
+                                       for ( var n = 0; n < registry[dependencies[0]].dependencies.length; n++ ) {
+                                               dependencies[dependencies.length] =
+                                                       registry[dependencies[0]].dependencies[n];
+                                       }
+                               }
+                       }
+                       // Add ready and error callbacks if they were given
+                       if ( arguments.length > 1 ) {
+                               jobs[jobs.length] = {
+                                       'dependencies': filter(
+                                               ['undefined', 'registered', 'loading', 'loaded'],
+                                               dependencies ),
+                                       'ready': ready,
+                                       'error': error
+                               };
+                       }
+                       // Queue up any dependencies that are undefined or registered
+                       dependencies = filter( ['undefined', 'registered'], dependencies );
+                       for ( var n = 0; n < dependencies.length; n++ ) {
+                               if ( $.inArray( dependencies[n], queue ) === -1 ) {
+                                       queue[queue.length] = dependencies[n];
+                               }
+                       }
+                       // Work the queue
+                       mediaWiki.loader.work();
+               }
+
+               function sortQuery(o) {
+                       var sorted = {}, key, a = [];
+                       for ( key in o ) {
+                               if ( o.hasOwnProperty( key ) ) {
+                                       a.push( key );
+                               }
+                       }
+                       a.sort();
+                       for ( key = 0; key < a.length; key++ ) {
+                               sorted[a[key]] = o[a[key]];
+                       }
+                       return sorted;
+               }
+               
+               /**
+                * Converts a module map of the form { foo: [ 'bar', 'baz' ], bar: [ 'baz, 'quux' ] }
+                * to a query string of the form foo.bar,baz|bar.baz,quux
+                */
+               function buildModulesString( moduleMap ) {
+                       var arr = [];
+                       for ( var prefix in moduleMap ) {
+                               var p = prefix === '' ? '' : prefix + '.';
+                               arr.push( p + moduleMap[prefix].join( ',' ) );
+                       }
+                       return arr.join( '|' );
+               }
+               
+
+               /* Public Methods */
+
+               /**
+                * Requests dependencies from server, loading and executing when things when ready.
+                */
+               this.work = function() {
+                       // Appends a list of modules to the batch
+                       for ( var q = 0; q < queue.length; q++ ) {
+                               // Only request modules which are undefined or registered
+                               if ( !( queue[q] in registry ) || registry[queue[q]].state == 'registered' ) {
+                                       // Prevent duplicate entries
+                                       if ( $.inArray( queue[q], batch ) === -1 ) {
+                                               batch[batch.length] = queue[q];
+                                               // Mark registered modules as loading
+                                               if ( queue[q] in registry ) {
+                                                       registry[queue[q]].state = 'loading';
+                                               }
+                                       }
+                               }
+                       }
+                       // Clean up the queue
+                       queue = [];
+                       // After document ready, handle the batch
+                       if ( !suspended && batch.length ) {
+                               // Always order modules alphabetically to help reduce cache
+                               // misses for otherwise identical content
+                               batch.sort();
+                               // Build a list of request parameters
+                               var base = {
+                                       'skin': mediaWiki.config.get( 'skin' ),
+                                       'lang': mediaWiki.config.get( 'wgUserLanguage' ),
+                                       'debug': mediaWiki.config.get( 'debug' )
+                               };
+                               // Extend request parameters with a list of modules in the batch
+                               var requests = [];
+                               // Split into groups
+                               var groups = {};
+                               for ( var b = 0; b < batch.length; b++ ) {
+                                       var group = registry[batch[b]].group;
+                                       if ( !( group in groups ) ) {
+                                               groups[group] = [];
+                                       }
+                                       groups[group][groups[group].length] = batch[b];
+                               }
+                               for ( var group in groups ) {
+                                       // Calculate the highest timestamp
+                                       var version = 0;
+                                       for ( var g = 0; g < groups[group].length; g++ ) {
+                                               if ( registry[groups[group][g]].version > version ) {
+                                                       version = registry[groups[group][g]].version;
+                                               }
+                                       }
+                                       var reqBase = $.extend( { 'version': formatVersionNumber( version ) }, base );
+                                       var reqBaseLength = $.param( reqBase ).length;
+                                       var reqs = [];
+                                       var limit = mw.config.get( 'wgResourceLoaderMaxQueryLength', -1 );
+                                       // We may need to split up the request to honor the query string length limit
+                                       // So build it piece by piece
+                                       var l = reqBaseLength + 9; // '&modules='.length == 9
+                                       var r = 0;
+                                       reqs[0] = {}; // { prefix: [ suffixes ] }
+                                       for ( var i = 0; i < groups[group].length; i++ ) {
+                                               // Determine how many bytes this module would add to the query string
+                                               var lastDotIndex = groups[group][i].lastIndexOf( '.' );
+                                               // Note that these substr() calls work even if lastDotIndex == -1
+                                               var prefix = groups[group][i].substr( 0, lastDotIndex );
+                                               var suffix = groups[group][i].substr( lastDotIndex + 1 );
+                                               var bytesAdded = prefix in reqs[r] ?
+                                                       suffix.length + 3 : // '%2C'.length == 3
+                                                       groups[group][i].length + 3; // '%7C'.length == 3
+                                               
+                                               // If the request would become too long, create a new one,
+                                               // but don't create empty requests
+                                               if ( limit > 0 &&  reqs[r] != {} && l + bytesAdded > limit ) {
+                                                       // This request would become too long, create a new one
+                                                       r++;
+                                                       reqs[r] = {};
+                                                       l = reqBaseLength + 9;
+                                               }
+                                               if ( !( prefix in reqs[r] ) ) {
+                                                       reqs[r][prefix] = [];
+                                               }
+                                               reqs[r][prefix].push( suffix );
+                                               l += bytesAdded;
+                                       }
+                                       for ( var r = 0; r < reqs.length; r++ ) {
+                                               requests[requests.length] = $.extend(
+                                                       { 'modules': buildModulesString( reqs[r] ) }, reqBase
+                                               );
+                                       }
+                               }
+                               // Clear the batch - this MUST happen before we append the
+                               // script element to the body or it's possible that the script
+                               // will be locally cached, instantly load, and work the batch
+                               // again, all before we've cleared it causing each request to
+                               // include modules which are already loaded
+                               batch = [];
+                               // Asynchronously append a script tag to the end of the body
+                               function request() {
+                                       var html = '';
+                                       for ( var r = 0; r < requests.length; r++ ) {
+                                               requests[r] = sortQuery( requests[r] );
+                                               // Build out the HTML
+                                               var src = mediaWiki.config.get( 'wgLoadScript' ) + '?' + $.param( requests[r] );
+                                               html += mediaWiki.html.element( 'script',
+                                                       { type: 'text/javascript', src: src }, '' );
+                                       }
+                                       return html;
+                               }
+                               // Load asynchronously after doumument ready
+                               if ( ready ) {
+                                       setTimeout( function() { $( 'body' ).append( request() ); }, 0 )
+                               } else {
+                                       document.write( request() );
+                               }
+                       }
+               };
+
+               /**
+                * Registers a module, letting the system know about it and its
+                * dependencies. loader.js files contain calls to this function.
+                */
+               this.register = function( module, version, dependencies, group ) {
+                       // Allow multiple registration
+                       if ( typeof module === 'object' ) {
+                               for ( var m = 0; m < module.length; m++ ) {
+                                       if ( typeof module[m] === 'string' ) {
+                                               mediaWiki.loader.register( module[m] );
+                                       } else if ( typeof module[m] === 'object' ) {
+                                               mediaWiki.loader.register.apply( mediaWiki.loader, module[m] );
+                                       }
+                               }
+                               return;
+                       }
+                       // Validate input
+                       if ( typeof module !== 'string' ) {
+                               throw new Error( 'module must be a string, not a ' + typeof module );
+                       }
+                       if ( typeof registry[module] !== 'undefined' ) {
+                               throw new Error( 'module already implemeneted: ' + module );
+                       }
+                       // List the module as registered
+                       registry[module] = {
+                               'state': 'registered',
+                               'group': typeof group === 'string' ? group : null,
+                               'dependencies': [],
+                               'version': typeof version !== 'undefined' ? parseInt( version ) : 0
+                       };
+                       if ( typeof dependencies === 'string' ) {
+                               // Allow dependencies to be given as a single module name
+                               registry[module].dependencies = [dependencies];
+                       } else if ( typeof dependencies === 'object' || typeof dependencies === 'function' ) {
+                               // Allow dependencies to be given as an array of module names
+                               // or a function which returns an array
+                               registry[module].dependencies = dependencies;
+                       }
+               };
+
+               /**
+                * Implements a module, giving the system a course of action to take
+                * upon loading. Results of a request for one or more modules contain
+                * calls to this function.
+                */
+               this.implement = function( module, script, style, localization ) {
+                       // Automatically register module
+                       if ( typeof registry[module] === 'undefined' ) {
+                               mediaWiki.loader.register( module );
+                       }
+                       // Validate input
+                       if ( typeof script !== 'function' ) {
+                               throw new Error( 'script must be a function, not a ' + typeof script );
+                       }
+                       if ( typeof style !== 'undefined'
+                               && typeof style !== 'string'
+                               && typeof style !== 'object' )
+                       {
+                               throw new Error( 'style must be a string or object, not a ' + typeof style );
+                       }
+                       if ( typeof localization !== 'undefined'
+                               && typeof localization !== 'object' )
+                       {
+                               throw new Error( 'localization must be an object, not a ' + typeof localization );
+                       }
+                       if ( typeof registry[module] !== 'undefined'
+                               && typeof registry[module].script !== 'undefined' )
+                       {
+                               throw new Error( 'module already implemeneted: ' + module );
+                       }
+                       // Mark module as loaded
+                       registry[module].state = 'loaded';
+                       // Attach components
+                       registry[module].script = script;
+                       if ( typeof style === 'string'
+                               || typeof style === 'object' && !( style instanceof Array ) )
+                       {
+                               registry[module].style = style;
+                       }
+                       if ( typeof localization === 'object' ) {
+                               registry[module].messages = localization;
+                       }
+                       // Execute or queue callback
+                       if ( compare(
+                               filter( ['ready'], registry[module].dependencies ),
+                               registry[module].dependencies ) )
+                       {
+                               execute( module );
+                       } else {
+                               request( module );
+                       }
+               };
+
+               /**
+                * Executes a function as soon as one or more required modules are ready
+                *
+                * @param dependencies string or array of strings of modules names the callback
+                *   dependencies to be ready before
+                * executing
+                * @param ready function callback to execute when all dependencies are ready (optional)
+                * @param error function callback to execute when if dependencies have a errors (optional)
+                */
+               this.using = function( dependencies, ready, error ) {
+                       // Validate input
+                       if ( typeof dependencies !== 'object' && typeof dependencies !== 'string' ) {
+                               throw new Error( 'dependencies must be a string or an array, not a ' +
+                                       typeof dependencies )
+                       }
+                       // Allow calling with a single dependency as a string
+                       if ( typeof dependencies === 'string' ) {
+                               dependencies = [dependencies];
+                       }
+                       // Resolve entire dependency map
+                       dependencies = resolve( dependencies );
+                       // If all dependencies are met, execute ready immediately
+                       if ( compare( filter( ['ready'], dependencies ), dependencies ) ) {
+                               if ( typeof ready === 'function' ) {
+                                       ready();
+                               }
+                       }
+                       // If any dependencies have errors execute error immediately
+                       else if ( filter( ['error'], dependencies ).length ) {
+                               if ( typeof error === 'function' ) {
+                                       error();
+                               }
+                       }
+                       // Since some dependencies are not yet ready, queue up a request
+                       else {
+                               request( dependencies, ready, error );
+                       }
+               };
+
+               /**
+                * Loads an external script or one or more modules for future use
+                *
+                * @param modules mixed either the name of a module, array of modules,
+                *   or a URL of an external script or style
+                * @param type string mime-type to use if calling with a URL of an
+                *   external script or style; acceptable values are "text/css" and
+                *   "text/javascript"; if no type is provided, text/javascript is
+                *   assumed
+                */
+               this.load = function( modules, type ) {
+                       // Validate input
+                       if ( typeof modules !== 'object' && typeof modules !== 'string' ) {
+                               throw new Error( 'dependencies must be a string or an array, not a ' +
+                                       typeof dependencies )
+                       }
+                       // Allow calling with an external script or single dependency as a string
+                       if ( typeof modules === 'string' ) {
+                               // Support adding arbitrary external scripts
+                               if ( modules.substr( 0, 7 ) == 'http://' || modules.substr( 0, 8 ) == 'https://' ) {
+                                       if ( type === 'text/css' ) {
+                                               $( 'head' )
+                                                       .append( $( '<link rel="stylesheet" type="text/css" />' )
+                                                       .attr( 'href', modules ) );
+                                               return true;
+                                       } else if ( type === 'text/javascript' || typeof type === 'undefined' ) {
+                                               var script = mediaWiki.html.element( 'script',
+                                                       { type: 'text/javascript', src: modules }, '' );
+                                               if ( ready ) {
+                                                       $( 'body' ).append( script );
+                                               } else {
+                                                       document.write( script );
+                                               }
+                                               return true;
+                                       }
+                                       // Unknown type
+                                       return false;
+                               }
+                               // Called with single module
+                               modules = [modules];
+                       }
+                       // Resolve entire dependency map
+                       modules = resolve( modules );
+                       // If all modules are ready, nothing dependency be done
+                       if ( compare( filter( ['ready'], modules ), modules ) ) {
+                               return true;
+                       }
+                       // If any modules have errors return false
+                       else if ( filter( ['error'], modules ).length ) {
+                               return false;
+                       }
+                       // Since some modules are not yet ready, queue up a request
+                       else {
+                               request( modules );
+                               return true;
+                       }
+               };
+
+               /**
+                * Flushes the request queue and begin executing load requests on demand
+                */
+               this.go = function() {
+                       suspended = false;
+                       mediaWiki.loader.work();
+               };
+
+               /**
+                * Changes the state of a module
+                *
+                * @param module string module name or object of module name/state pairs
+                * @param state string state name
+                */
+               this.state = function( module, state ) {
+                       if ( typeof module === 'object' ) {
+                               for ( var m in module ) {
+                                       mediaWiki.loader.state( m, module[m] );
+                               }
+                               return;
+                       }
+                       if ( !( module in registry ) ) {
+                               mediaWiki.loader.register( module );
+                       }
+                       registry[module].state = state;
+               };
+
+               /**
+                * Gets the version of a module
+                *
+                * @param module string name of module to get version for
+                */
+               this.version = function( module ) {
+                       if ( module in registry && 'version' in registry[module] ) {
+                               return formatVersionNumber( registry[module].version );
+                       }
+                       return null;
+               };
+
+               /* Cache document ready status */
+
+               $(document).ready( function() { ready = true; } );
+       } )();
+
+       /** HTML construction helper functions */
+       this.html = new ( function () {
+               function escapeCallback( s ) {
+                       switch ( s ) {
+                               case "'":
+                                       return '&#039;';
+                               case '"':
+                                       return '&quot;';
+                               case '<':
+                                       return '&lt;';
+                               case '>':
+                                       return '&gt;';
+                               case '&':
+                                       return '&amp;';
+                       }
+               }
+
+               /**
+                * Escape a string for HTML. Converts special characters to HTML entities.
+                * @param s The string to escape
+                */
+               this.escape = function( s ) {
+                       return s.replace( /['"<>&]/g, escapeCallback );
+               };
+
+               /**
+                * Wrapper object for raw HTML passed to mediaWiki.html.element().
+                */
+               this.Raw = function( value ) {
+                       this.value = value;
+               };
+
+               /**
+                * Wrapper object for CDATA element contents passed to mediaWiki.html.element()
+                */
+               this.Cdata = function( value ) {
+                       this.value = value;
+               };
+
+               /**
+                * Create an HTML element string, with safe escaping.
+                *
+                * @param name The tag name.
+                * @param attrs An object with members mapping element names to values
+                * @param contents The contents of the element. May be either:
+                *    - string: The string is escaped.
+                *    - null or undefined: The short closing form is used, e.g. <br/>.
+                *    - this.Raw: The value attribute is included without escaping.
+                *    - this.Cdata: The value attribute is included, and an exception is
+                *      thrown if it contains an illegal ETAGO delimiter.
+                *      See http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.3.2
+                *
+                * Example:
+                *    var h = mediaWiki.html;
+                *    return h.element( 'div', {},
+                *        new h.Raw( h.element( 'img', {src: '<'} ) ) );
+                * Returns <div><img src="&lt;"/></div>
+                */
+               this.element = function( name, attrs, contents ) {
+                       var s = '<' + name;
+                       for ( var attrName in attrs ) {
+                               s += ' ' + attrName + '="' + this.escape( attrs[attrName] ) + '"';
+                       }
+                       if ( typeof contents == 'undefined' || contents === null ) {
+                               // Self close tag
+                               s += '/>';
+                               return s;
+                       }
+                       // Regular open tag
+                       s += '>';
+                       if ( typeof contents === 'string') {
+                               // Escaped
+                               s += this.escape( contents );
+                       } else if ( contents instanceof this.Raw ) {
+                               // Raw HTML inclusion
+                               s += contents.value;
+                       } else if ( contents instanceof this.Cdata ) {
+                               // CDATA
+                               if ( /<\/[a-zA-z]/.test( contents.value ) ) {
+                                       throw new Error( 'mw.html.element: Illegal end tag found in CDATA' );
+                               }
+                               s += contents.value;
+                       } else {
+                               throw new Error( 'mw.html.element: Invalid type of contents' );
+                       }
+                       s += '</' + name + '>';
+                       return s;
+               };
+       } )();
+
+
+       /* Extension points */
+
+       this.legacy = {};
+
+} )( jQuery );
+
+/* Auto-register from pre-loaded startup scripts */
+
+if ( typeof startUp === 'function' ) {
+       startUp();
+       delete startUp;
+}
+
+// Add jQuery Cookie to initial payload (used in mediaWiki.user)
+mediaWiki.loader.load( 'jquery.cookie' );
+
+// Alias $j to jQuery for backwards compatibility
+window.$j = jQuery;
+window.mw = mediaWiki;