From: Krinkle <krinkle@users.mediawiki.org>
Date: Sat, 17 Sep 2011 20:15:24 +0000 (+0000)
Subject: [RL] Stand-alone ResourceLoader front-end
X-Git-Tag: 1.31.0-rc.0~27585
X-Git-Url: https://git.cyclocoop.org/%27.%24link.%27?a=commitdiff_plain;h=97e41cb3b68b2dfc41dcda98499b1f512625656c;p=lhc%2Fweb%2Fwiklou.git

[RL] Stand-alone ResourceLoader front-end
* In preparation of this, duplicating the entire file as-is in order to preserve svn history.

(Part of bug 30956)
---

diff --git a/resources/ResourceLoader.js b/resources/ResourceLoader.js
new file mode 100644
index 0000000000..7da282173d
--- /dev/null
+++ b/resources/ResourceLoader.js
@@ -0,0 +1,1304 @@
+/*
+ * Core MediaWiki JavaScript Library
+ */
+
+// Attach to window and globally alias
+window.mw = window.mediaWiki = new ( function( $ ) {
+
+	/* Private Members */
+
+	/**
+	 * @var object List of messages that have been requested to be loaded.
+	 */
+	var messageQueue = {};
+
+	/* Object constructors */
+
+	/**
+	 * Map
+	 *
+	 * Creates an object that can be read from or written to from prototype functions
+	 * that allow both single and multiple variables at once.
+	 *
+	 * @param global boolean Whether to store the values in the global window
+	 *  object or a exclusively in the object property 'values'.
+	 * @return Map
+	 */
+	function Map( global ) {
+		this.values = ( global === true ) ? window : {};
+		return this;
+	}
+
+	Map.prototype = {
+		/**
+		 * Get the value of one or multiple a keys.
+		 *
+		 * If called with no arguments, all values will be returned.
+		 *
+		 * @param selection mixed String key or array of keys to get values for.
+		 * @param fallback mixed Value to use in case key(s) do not exist (optional).
+		 * @return mixed If selection was a string returns the value or null,
+		 *  If selection was an array, returns an object of key/values (value is null if not found),
+		 *  If selection was not passed or invalid, will return the 'values' object member (be careful as
+		 *  objects are always passed by reference in JavaScript!).
+		 * @return Values as a string or object, null if invalid/inexistant.
+		 */
+		get: function( selection, fallback ) {
+			if ( $.isArray( selection ) ) {
+				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 ( this.values[selection] === undefined ) {
+					if ( fallback !== undefined ) {
+						return fallback;
+					}
+					return null;
+				}
+				return this.values[selection];
+			}
+			if ( selection === undefined ) {
+				return this.values;
+			} else {
+				return null; // invalid selection key
+			}
+		},
+
+		/**
+		 * Sets one or multiple key/value pairs.
+		 *
+		 * @param selection mixed String key or array of keys to set values for.
+		 * @param value mixed Value to set (optional, only in use when key is a string)
+		 * @return bool This returns true on success, false on failure.
+		 */
+		set: function( selection, value ) {
+			if ( $.isPlainObject( selection ) ) {
+				for ( var s in selection ) {
+					this.values[s] = selection[s];
+				}
+				return true;
+			} else if ( typeof selection === 'string' && value !== undefined ) {
+				this.values[selection] = value;
+				return true;
+			}
+			return false;
+		},
+
+		/**
+		 * Checks if one or multiple keys exist.
+		 *
+		 * @param selection mixed String key or array of keys to check
+		 * @return boolean Existence of key(s)
+		 */
+		exists: function( selection ) {
+			if ( typeof selection === '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 constructor for messages,
+	 * similar to the Message class in MediaWiki PHP.
+	 *
+	 * @param map Map Instance of mw.Map
+	 * @param key String
+	 * @param parameters Array
+	 * @return Message
+	 */
+	function Message( map, key, parameters ) {
+		this.format = 'plain';
+		this.map = map;
+		this.key = key;
+		this.parameters = parameters === undefined ? [] : $.makeArray( parameters );
+		return this;
+	}
+
+	Message.prototype = {
+		/**
+		 * Appends (does not replace) parameters for replacement to the .parameters property.
+		 *
+		 * @param parameters Array
+		 * @return Message
+		 */
+		params: function( parameters ) {
+			for ( var i = 0; i < parameters.length; i++ ) {
+				this.parameters.push( parameters[i] );
+			}
+			return this;
+		},
+
+		/**
+		 * Converts message object to it's string form based on the state of format.
+		 *
+		 * @return string Message as a string in the current form or <key> if key does not exist.
+		 */
+		toString: function() {
+
+			if ( !this.map.exists( this.key ) ) {
+				// Use <key> as text if key does not exist
+				if ( this.format !== 'plain' ) {
+					// format 'escape' and 'parse' need to have the brackets and key html escaped
+					return mw.html.escape( '<' + this.key + '>' );
+				}
+				return '<' + this.key + '>';
+			}
+			var	text = this.map.get( this.key ),
+				parameters = this.parameters;
+
+			text = text.replace( /\$(\d+)/g, function( string, match ) {
+				var index = parseInt( match, 10 ) - 1;
+				return index in parameters ? parameters[index] : '$' + match;
+			} );
+
+			if ( this.format === 'plain' ) {
+				return text;
+			}
+			if ( this.format === 'escaped' ) {
+				// According to Message.php this needs {{-transformation, which is
+				// still todo
+				return mw.html.escape( text );
+			}
+
+			/* This should be fixed up when we have a parser
+			if ( this.format === 'parse' && 'language' in mw ) {
+				text = mw.language.parse( text );
+			}
+			*/
+			return text;
+		},
+
+		/**
+		 * Changes format to parse and converts message to string
+		 *
+		 * @return {string} String form of parsed message
+		 */
+		parse: function() {
+			this.format = 'parse';
+			return this.toString();
+		},
+
+		/**
+		 * Changes format to plain and converts message to string
+		 *
+		 * @return {string} String form of plain message
+		 */
+		plain: function() {
+			this.format = 'plain';
+			return this.toString();
+		},
+
+		/**
+		 * Changes the format to html escaped and converts message to string
+		 *
+		 * @return {string} String form of html escaped message
+		 */
+		escaped: function() {
+			this.format = 'escaped';
+			return this.toString();
+		},
+
+		/**
+		 * Checks if message exists
+		 *
+		 * @return {string} String form of parsed message
+		 */
+		exists: function() {
+			return this.map.exists( this.key );
+		}
+	};
+
+	/* Public Members */
+
+	/*
+	 * Dummy function which in debug mode can be replaced with a function that
+	 * emulates console.log in console-less environments.
+	 */
+	this.log = function() { };
+
+	/**
+	 * @var constructor Make the Map constructor publicly available.
+	 */
+	this.Map = Map;
+
+	/**
+	 * List of configuration values
+	 *
+	 * Dummy placeholder. Initiated in startUp module as a new instance of mw.Map().
+	 * If $wgLegacyJavaScriptGlobals is true, this Map will have its values
+	 * in the global window object.
+	 */
+	this.config = null;
+
+	/**
+	 * @var object
+	 *
+	 * Empty object that plugins can be installed in.
+	 */
+	this.libs = {};
+
+	/*
+	 * Localization system
+	 */
+	this.messages = new this.Map();
+
+	/* Public Methods */
+
+	/**
+	 * Gets a message object, similar to wfMessage()
+	 *
+	 * @param key string Key of message to get
+	 * @param parameter_1 mixed First argument in a list of variadic arguments,
+	 *  each a parameter for $N replacement in messages.
+	 * @return Message
+	 */
+	this.message = function( key, parameter_1 /* [, parameter_2] */ ) {
+		var parameters;
+		// Support variadic arguments
+		if ( parameter_1 !== undefined ) {
+			parameters = $.makeArray( arguments );
+			parameters.shift();
+		} else {
+			parameters = [];
+		}
+		return new Message( mw.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 $N replacement in messages.
+	 * @return String.
+	 */
+	this.msg = function( key, parameters ) {
+		return mw.message.apply( mw.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.
+		 *
+		 * For exact details on support for script, style and messages, look at
+		 * mw.loader.implement.
+		 *
+		 * Format:
+		 *	{
+		 *		'moduleName': {
+		 *			'version': ############## (unix timestamp),
+		 *			'dependencies': ['required.foo', 'bar.also', ...], (or) function() {}
+		 *			'group': 'somegroup', (or) null,
+		 *			'source': 'local', 'someforeignwiki', (or) null
+		 *			'state': 'registered', 'loading', 'loaded', 'ready', or 'error'
+		 *			'script': ...,
+		 *			'style': ...,
+		 *			'messages': { 'key': 'value' },
+		 *		}
+		 *	}
+		 */
+		var	registry = {},
+			/**
+			 * Mapping of sources, keyed by source-id, values are objects.
+			 * Format:
+			 *	{
+			 *		'sourceId': {
+			 *			'loadScript': 'http://foo.bar/w/load.php'
+			 *		}
+			 *	}
+			 */
+			sources = {},
+			// List of modules which will be loaded as when ready
+			batch = [],
+			// List of modules to be loaded
+			queue = [],
+			// List of callback functions waiting for modules to be ready to be called
+			jobs = [],
+			// Flag inidicating that document ready has occured
+			ready = false,
+			// Selector cache for the marker element. Use getMarker() to get/use the marker!
+			$marker = null;
+
+		/* Private Methods */
+
+		function getMarker(){
+			// Cached ?
+			if ( $marker ) {
+				return $marker;
+			} else {
+				$marker = $( 'meta[name="ResourceLoaderDynamicStyles"]' );
+				if ( $marker.length ) {
+					return $marker;
+				}
+				mw.log( 'getMarker> No <meta name="ResourceLoaderDynamicStyles"> found, inserting dynamically.' );
+				$marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' );
+				return $marker;
+			}
+		}
+
+		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 ) {
+			var	pad = function( a, b, c ) {
+					return [a < 10 ? '0' + a : a, b < 10 ? '0' + b : b, c < 10 ? '0' + c : c].join( '' );
+				},
+				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 ( registry[module] === undefined ) {
+				throw new Error( 'Unknown dependency: ' + module );
+			}
+			// Resolves dynamic loader function and replaces it with its own results
+			if ( $.isFunction( registry[module].dependencies ) ) {
+				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 ) {
+			// 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 = [], module;
+			if ( 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 ( 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, callback ) {
+			if ( 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 styles
+			var style;
+			if ( $.isPlainObject( registry[module].style ) ) {
+				for ( var media in registry[module].style ) {
+					style = registry[module].style[media];
+					if ( $.isArray( style ) ) {
+						for ( var i = 0; i < style.length; i++ ) {
+							getMarker().before( mw.html.element( 'link', {
+								'type': 'text/css',
+								'media': media,
+								'rel': 'stylesheet',
+								'href': style[i]
+							} ) );
+						}
+					} else if ( typeof style === 'string' ) {
+						getMarker().before( mw.html.element( 'style', {
+							'type': 'text/css',
+							'media': media
+						}, new mw.html.Cdata( style ) ) );
+					}
+				}
+			}
+			// Add localizations to message system
+			if ( $.isPlainObject( registry[module].messages ) ) {
+				mw.messages.set( registry[module].messages );
+			}
+			// Execute script
+			try {
+				var	script = registry[module].script,
+					markModuleReady = function() {
+						registry[module].state = 'ready';
+						handlePending( module );
+						if ( $.isFunction( callback ) ) {
+							callback();
+						}
+					},
+					nestedAddScript = function( arr, callback, i ) {
+						// Recursively call addScript() in its own callback
+						// for each element of arr.
+						if ( i >= arr.length ) {
+							// We're at the end of the array
+							callback();
+							return;
+						}
+						
+						addScript( arr[i], function() {
+							nestedAddScript( arr, callback, i + 1 );
+						} );
+					};
+
+				if ( $.isArray( script ) ) {
+					registry[module].state = 'loading';
+					nestedAddScript( script, markModuleReady, 0 );
+				} else if ( $.isFunction( script ) ) {
+					script( $ );
+					markModuleReady();
+				}
+			} catch ( e ) {
+				// This needs to NOT use mw.log because these errors are common in production mode
+				// and not in debug mode, such as when a symbol that should be global isn't exported
+				if ( window.console && typeof window.console.log === 'function' ) {
+					console.log( 'mw.loader::execute> Exception thrown by ' + module + ': ' + e.message );
+				}
+				registry[module].state = 'error';
+				throw e;
+			}
+		}
+
+		/**
+		 * Automatically executes jobs and modules which are pending with satistifed dependencies.
+		 *
+		 * This is used when dependencies are satisfied, such as when a module is executed.
+		 */
+		function handlePending( module ) {
+			try {
+				// 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 ( $.isFunction( jobs[j].ready ) ) {
+							jobs[j].ready();
+						}
+						jobs.splice( j, 1 );
+						j--;
+					}
+				}
+				// Execute modules who's dependencies have just been met
+				for ( var r in registry ) {
+					if ( registry[r].state === 'loaded' ) {
+						if ( compare(
+							filter( ['ready'], registry[r].dependencies ),
+							registry[r].dependencies ) )
+						{
+							execute( r );
+						}
+					}
+				}
+			} catch ( e ) {
+				// 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 ( $.isFunction( jobs[j].error ) ) {
+							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 ) {
+					// Cache repetitively accessed deep level object member
+					var	regItemDeps = registry[dependencies[0]].dependencies,
+						// Cache to avoid looped access to length property
+						regItemDepLen = regItemDeps.length;
+					for ( var n = 0; n < regItemDepLen; n++ ) {
+						dependencies[dependencies.length] = regItemDeps[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
+			mw.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 = [], p;
+			for ( var prefix in moduleMap ) {
+				p = prefix === '' ? '' : prefix + '.';
+				arr.push( p + moduleMap[prefix].join( ',' ) );
+			}
+			return arr.join( '|' );
+		}
+
+		/**
+		 * Adds a script tag to the body, either using document.write or low-level DOM manipulation,
+		 * depending on whether document-ready has occured yet.
+		 *
+		 * @param src String: URL to script, will be used as the src attribute in the script tag
+		 * @param callback Function: Optional callback which will be run when the script is done
+		 */
+		function addScript( src, callback ) {
+			var done = false, script;
+			if ( ready ) {
+				// jQuery's getScript method is NOT better than doing this the old-fashioned way
+				// because jQuery will eval the script's code, and errors will not have sane
+				// line numbers.
+				script = document.createElement( 'script' );
+				script.setAttribute( 'src', src );
+				script.setAttribute( 'type', 'text/javascript' );
+				if ( $.isFunction( callback ) ) {
+					// Attach handlers for all browsers -- this is based on jQuery.ajax
+					script.onload = script.onreadystatechange = function() {
+
+						if (
+							!done
+							&& (
+								!script.readyState
+								|| /loaded|complete/.test( script.readyState )
+							)
+						) {
+
+							done = true;
+
+							// Handle memory leak in IE
+							script.onload = script.onreadystatechange = null;
+
+							callback();
+
+							if ( script.parentNode ) {
+								script.parentNode.removeChild( script );
+							}
+
+							// Dereference the script
+							script = undefined;
+						}
+					};
+				}
+				document.body.appendChild( script );
+			} else {
+				document.write( mw.html.element(
+					'script', { 'type': 'text/javascript', 'src': src }, ''
+				) );
+				if ( $.isFunction( callback ) ) {
+					// Document.write is synchronous, so this is called when it's done
+					callback();
+				}
+			}
+		}
+
+		/**
+		 * Asynchronously append a script tag to the end of the body
+		 * that invokes load.php
+		 * @param moduleMap {Object}: Module map, see buildModulesString()
+		 * @param currReqBase {Object}: Object with other parameters (other than 'modules') to use in the request
+		 * @param sourceLoadScript {String}: URL of load.php
+		 */
+		function doRequest( moduleMap, currReqBase, sourceLoadScript ) {
+			var request = $.extend(
+				{ 'modules': buildModulesString( moduleMap ) },
+				currReqBase
+			);
+			request = sortQuery( request );
+			// Asynchronously append a script tag to the end of the body
+			// Append &* to avoid triggering the IE6 extension check
+			addScript( sourceLoadScript + '?' + $.param( request ) + '&*' );
+		}
+
+		/* Public Methods */
+
+		/**
+		 * Requests dependencies from server, loading and executing when things when ready.
+		 */
+		this.work = function() {
+				// Build a list of request parameters common to all requests.
+			var	reqBase = {
+					skin: mw.config.get( 'skin' ),
+					lang: mw.config.get( 'wgUserLanguage' ),
+					debug: mw.config.get( 'debug' )
+				},
+				// Split module batch by source and by group.
+				splits = {},
+				maxQueryLength = mw.config.get( 'wgResourceLoaderMaxQueryLength', -1 );
+
+			// Appends a list of modules from the queue 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';
+						}
+					}
+				}
+			}
+			// Early exit if there's nothing to load...
+			if ( !batch.length ) {
+				return;
+			}
+
+			// The queue has been processed into the batch, clear up the queue.
+			queue = [];
+
+			// Always order modules alphabetically to help reduce cache
+			// misses for otherwise identical content.
+			batch.sort();
+
+			// Split batch by source and by group.
+			for ( var b = 0; b < batch.length; b++ ) {
+				var	bSource = registry[batch[b]].source,
+					bGroup = registry[batch[b]].group;
+				if ( !( bSource in splits ) ) {
+					splits[bSource] = {};
+				}
+				if ( !( bGroup in splits[bSource] ) ) {
+					splits[bSource][bGroup] = [];
+				}
+				var bSourceGroup = splits[bSource][bGroup];
+				bSourceGroup[bSourceGroup.length] = batch[b];
+			}
+
+			// Clear the batch - this MUST happen before we append any
+			// script elements to the body or it's possible that a 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 = [];
+
+			var source, group, modules, maxVersion, sourceLoadScript;
+
+			for ( source in splits ) {
+
+				sourceLoadScript = sources[source].loadScript;
+
+				for ( group in splits[source] ) {
+
+					// Cache access to currently selected list of
+					// modules for this group from this source.
+					modules = splits[source][group];
+
+					// Calculate the highest timestamp
+					maxVersion = 0;
+					for ( var g = 0; g < modules.length; g++ ) {
+						if ( registry[modules[g]].version > maxVersion ) {
+							maxVersion = registry[modules[g]].version;
+						}
+					}
+
+					var	currReqBase = $.extend( { 'version': formatVersionNumber( maxVersion ) }, reqBase ),
+						currReqBaseLength = $.param( currReqBase ).length,
+						moduleMap = {},
+						// We may need to split up the request to honor the query string length limit,
+						// so build it piece by piece.
+						l = currReqBaseLength + 9; // '&modules='.length == 9
+
+					moduleMap = {}; // { prefix: [ suffixes ] }
+
+					for ( var i = 0; i < modules.length; i++ ) {
+							// Determine how many bytes this module would add to the query string
+						var	lastDotIndex = modules[i].lastIndexOf( '.' ),
+							// Note that these substr() calls work even if lastDotIndex == -1
+							prefix = modules[i].substr( 0, lastDotIndex ),
+							suffix = modules[i].substr( lastDotIndex + 1 ),
+							bytesAdded = prefix in moduleMap
+								? suffix.length + 3 // '%2C'.length == 3
+								: modules[i].length + 3; // '%7C'.length == 3
+
+						// If the request would become too long, create a new one,
+						// but don't create empty requests
+						if ( maxQueryLength > 0 && !$.isEmptyObject( moduleMap ) && l + bytesAdded > maxQueryLength ) {
+							// This request would become too long, create a new one
+							// and fire off the old one
+							doRequest( moduleMap, currReqBase, sourceLoadScript );
+							moduleMap = {};
+							l = currReqBaseLength + 9;
+						}
+						if ( !( prefix in moduleMap ) ) {
+							moduleMap[prefix] = [];
+						}
+						moduleMap[prefix].push( suffix );
+						l += bytesAdded;
+					}
+					// If there's anything left in moduleMap, request that too
+					if ( !$.isEmptyObject( moduleMap ) ) {
+						doRequest( moduleMap, currReqBase, sourceLoadScript );
+					}
+				}
+			}
+		};
+
+		/**
+		 * Register a source.
+		 *
+		 * @param id {String}: Short lowercase a-Z string representing a source, only used internally.
+		 * @param props {Object}: Object containing only the loadScript property which is a url to
+		 * the load.php location of the source.
+		 * @return {Boolean}
+		 */
+		this.addSource = function( id, props ) {
+			// Allow multiple additions
+			if ( typeof id === 'object' ) {
+				for ( var source in id ) {
+					mw.loader.addSource( source, id[source] );
+				}
+				return true;
+			}
+
+			if ( sources[id] !== undefined ) {
+				throw new Error( 'source already registered: ' + id );
+			}
+
+			sources[id] = props;
+
+			return true;
+		};
+
+		/**
+		 * Registers a module, letting the system know about it and its
+		 * properties. Startup modules contain calls to this function.
+		 *
+		 * @param module {String}: Module name
+		 * @param version {Number}: Module version number as a timestamp (falls backs to 0)
+		 * @param dependencies {String|Array|Function}: One string or array of strings of module
+		 *  names on which this module depends, or a function that returns that array.
+		 * @param group {String}: Group which the module is in (optional, defaults to null)
+		 * @param source {String}: Name of the source. Defaults to local.
+		 */
+		this.register = function( module, version, dependencies, group, source ) {
+			// Allow multiple registration
+			if ( typeof module === 'object' ) {
+				for ( var m = 0; m < module.length; m++ ) {
+					// module is an array of module names
+					if ( typeof module[m] === 'string' ) {
+						mw.loader.register( module[m] );
+					// module is an array of arrays
+					} else if ( typeof module[m] === 'object' ) {
+						mw.loader.register.apply( mw.loader, module[m] );
+					}
+				}
+				return;
+			}
+			// Validate input
+			if ( typeof module !== 'string' ) {
+				throw new Error( 'module must be a string, not a ' + typeof module );
+			}
+			if ( registry[module] !== undefined ) {
+				throw new Error( 'module already implemented: ' + module );
+			}
+			// List the module as registered
+			registry[module] = {
+				'version': version !== undefined ? parseInt( version, 10 ) : 0,
+				'dependencies': [],
+				'group': typeof group === 'string' ? group : null,
+				'source': typeof source === 'string' ? source: 'local',
+				'state': 'registered'
+			};
+			if ( typeof dependencies === 'string' ) {
+				// Allow dependencies to be given as a single module name
+				registry[module].dependencies = [dependencies];
+			} else if ( typeof dependencies === 'object' || $.isFunction( dependencies ) ) {
+				// Allow dependencies to be given as an array of module names
+				// or a function which returns an array
+				registry[module].dependencies = dependencies;
+			}
+		};
+
+		/**
+		 * Implements a module, giving the system a course of action to take
+		 * upon loading. Results of a request for one or more modules contain
+		 * calls to this function.
+		 *
+		 * All arguments are required.
+		 *
+		 * @param module String: Name of module
+		 * @param script Mixed: Function of module code or String of URL to be used as the src
+		 *  attribute when adding a script element to the body
+		 * @param style Object: Object of CSS strings keyed by media-type or Object of lists of URLs
+		 *  keyed by media-type
+		 * @param msgs Object: List of key/value pairs to be passed through mw.messages.set
+		 */
+		this.implement = function( module, script, style, msgs ) {
+			// Validate input
+			if ( typeof module !== 'string' ) {
+				throw new Error( 'module must be a string, not a ' + typeof module );
+			}
+			if ( !$.isFunction( script ) && !$.isArray( script ) ) {
+				throw new Error( 'script must be a function or an array, not a ' + typeof script );
+			}
+			if ( !$.isPlainObject( style ) ) {
+				throw new Error( 'style must be an object, not a ' + typeof style );
+			}
+			if ( !$.isPlainObject( msgs ) ) {
+				throw new Error( 'msgs must be an object, not a ' + typeof msgs );
+			}
+			// Automatically register module
+			if ( registry[module] === undefined ) {
+				mw.loader.register( module );
+			}
+			// Check for duplicate implementation
+			if ( registry[module] !== undefined && registry[module].script !== undefined ) {
+				throw new Error( 'module already implemented: ' + module );
+			}
+			// Mark module as loaded
+			registry[module].state = 'loaded';
+			// Attach components
+			registry[module].script = script;
+			registry[module].style = style;
+			registry[module].messages = msgs;
+			// 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 ) {
+			var tod = typeof dependencies;
+			// Validate input
+			if ( tod !== 'object' && tod !== 'string' ) {
+				throw new Error( 'dependencies must be a string or an array, not a ' + tod );
+			}
+			// Allow calling with a single dependency as a string
+			if ( tod === '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 ( $.isFunction( ready ) ) {
+					ready();
+				}
+			}
+			// If any dependencies have errors execute error immediately
+			else if ( filter( ['error'], dependencies ).length ) {
+				if ( $.isFunction( error ) ) {
+					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( 'modules must be a string or an array, not a ' + typeof modules );
+			}
+			// Allow calling with an external script or single dependency as a string
+			if ( typeof modules === 'string' ) {
+				// Support adding arbitrary external scripts
+				if ( /^(https?:)?\/\//.test( modules ) ) {
+					if ( type === 'text/css' ) {
+						$( 'head' ).append( $( '<link/>', {
+							rel: 'stylesheet',
+							type: 'text/css',
+							href: modules
+						} ) );
+						return true;
+					} else if ( type === 'text/javascript' || type === undefined ) {
+						addScript( modules );
+						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;
+			}
+		};
+
+		/**
+		 * 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 ) {
+					mw.loader.state( m, module[m] );
+				}
+				return;
+			}
+			if ( !( module in registry ) ) {
+				mw.loader.register( module );
+			}
+			registry[module].state = state;
+		};
+
+		/**
+		 * Gets the version of a module
+		 *
+		 * @param module string name of module to get version for
+		 */
+		this.getVersion = function( module ) {
+			if ( module in registry && 'version' in registry[module] ) {
+				return formatVersionNumber( registry[module].version );
+			}
+			return null;
+		};
+
+		/**
+		* @deprecated use mw.loader.getVersion() instead
+		*/
+		this.version = function() {
+			return mw.loader.getVersion.apply( mw.loader, arguments );
+		};
+
+		/**
+		 * Gets the state of a module
+		 *
+		 * @param module string name of module to get state for
+		 */
+		this.getState = function( module ) {
+			if ( module in registry && 'state' in registry[module] ) {
+				return registry[module].state;
+			}
+			return null;
+		};
+
+		/**
+		 * Get names of all registered modules.
+		 *
+		 * @return {Array}
+		 */
+		this.getModuleNames = function() {
+			var names = $.map( registry, function( i, key ) {
+				return key;
+			} );
+			return names;
+		};
+
+		/* Cache document ready status */
+
+		$(document).ready( function() { ready = true; } );
+	} )();
+
+	/** HTML construction helper functions */
+	this.html = new ( function () {
+		var escapeCallback = function( 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 mw.html.element().
+		 */
+		this.Raw = function( value ) {
+			this.value = value;
+		};
+
+		/**
+		 * Wrapper object for CDATA element contents passed to mw.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 = mw.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 v, s = '<' + name;
+			for ( var attrName in attrs ) {
+				v = attrs[attrName];
+				// Convert name=true, to name=name
+				if ( v === true ) {
+					v = attrName;
+				// Skip name=false
+				} else if ( v === false ) {
+					continue;
+				}
+				s += ' ' + attrName + '="' + this.escape( '' + v ) + '"';
+			}
+			if ( contents === undefined || contents === null ) {
+				// Self close tag
+				s += '/>';
+				return s;
+			}
+			// Regular open tag
+			s += '>';
+			switch ( typeof contents ) {
+				case 'string':
+					// Escaped
+					s += this.escape( contents );
+					break;
+				case 'number':
+				case 'boolean':
+					// Convert to string
+					s += '' + contents;
+					break;
+				default:
+					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 );
+
+// Alias $j to jQuery for backwards compatibility
+window.$j = jQuery;
+
+// Auto-register from pre-loaded startup scripts
+if ( typeof startUp !== 'undefined' && jQuery.isFunction( startUp ) ) {
+	startUp();
+	delete startUp;
+}