User:WhoSaidThat/mw-lib.js

/* * 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 if key does not exist. */		toString: function {

if ( !this.map.exists( this.key ) ) { // Use 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  found, inserting dynamically.' ); $marker = $( ' ' ).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( $( ' ', { 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; };

/**		 * For backwards-compatibility with Squid-cached pages. Loads mw.user */		this.go = function { mw.loader.load( 'mediawiki.user' ); };

/* 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.. * - 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  */		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 += ''; 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; }