2 * Core MediaWiki JavaScript Library
5 var mw
= ( function ( $, undefined ) {
10 var hasOwn
= Object
.prototype.hasOwnProperty
;
12 /* Object constructors */
17 * Creates an object that can be read from or written to from prototype functions
18 * that allow both single and multiple variables at once.
20 * @param global boolean Whether to store the values in the global window
21 * object or a exclusively in the object property 'values'.
24 function Map( global
) {
25 this.values
= global
=== true ? window
: {};
31 * Get the value of one or multiple a keys.
33 * If called with no arguments, all values will be returned.
35 * @param selection mixed String key or array of keys to get values for.
36 * @param fallback mixed Value to use in case key(s) do not exist (optional).
37 * @return mixed If selection was a string returns the value or null,
38 * If selection was an array, returns an object of key/values (value is null if not found),
39 * If selection was not passed or invalid, will return the 'values' object member (be careful as
40 * objects are always passed by reference in JavaScript!).
41 * @return Values as a string or object, null if invalid/inexistant.
43 get: function ( selection
, fallback
) {
46 if ( $.isArray( selection
) ) {
47 selection
= $.makeArray( selection
);
49 for ( i
= 0; i
< selection
.length
; i
+= 1 ) {
50 results
[selection
[i
]] = this.get( selection
[i
], fallback
);
53 } else if ( typeof selection
=== 'string' ) {
54 if ( this.values
[selection
] === undefined ) {
55 if ( fallback
!== undefined ) {
60 return this.values
[selection
];
62 if ( selection
=== undefined ) {
65 return null; // invalid selection key
70 * Sets one or multiple key/value pairs.
72 * @param selection {mixed} String key or array of keys to set values for.
73 * @param value {mixed} Value to set (optional, only in use when key is a string)
74 * @return {Boolean} This returns true on success, false on failure.
76 set: function ( selection
, value
) {
79 if ( $.isPlainObject( selection
) ) {
80 for ( s
in selection
) {
81 this.values
[s
] = selection
[s
];
84 } else if ( typeof selection
=== 'string' && value
!== undefined ) {
85 this.values
[selection
] = value
;
92 * Checks if one or multiple keys exist.
94 * @param selection {mixed} String key or array of keys to check
95 * @return {Boolean} Existence of key(s)
97 exists: function ( selection
) {
100 if ( $.isArray( selection
) ) {
101 for ( s
= 0; s
< selection
.length
; s
+= 1 ) {
102 if ( this.values
[selection
[s
]] === undefined ) {
108 return this.values
[selection
] !== undefined;
116 * Object constructor for messages,
117 * similar to the Message class in MediaWiki PHP.
119 * @param map Map Instance of mw.Map
121 * @param parameters Array
124 function Message( map
, key
, parameters
) {
125 this.format
= 'plain';
128 this.parameters
= parameters
=== undefined ? [] : $.makeArray( parameters
);
132 Message
.prototype = {
134 * Appends (does not replace) parameters for replacement to the .parameters property.
136 * @param parameters Array
139 params: function ( parameters
) {
141 for ( i
= 0; i
< parameters
.length
; i
+= 1 ) {
142 this.parameters
.push( parameters
[i
] );
148 * Converts message object to it's string form based on the state of format.
150 * @return string Message as a string in the current form or <key> if key does not exist.
152 toString: function() {
153 if ( !this.map
.exists( this.key
) ) {
154 // Use <key> as text if key does not exist
155 if ( this.format
!== 'plain' ) {
156 // format 'escape' and 'parse' need to have the brackets and key html escaped
157 return mw
.html
.escape( '<' + this.key
+ '>' );
159 return '<' + this.key
+ '>';
162 var text
= mw
.jqueryMsg
.getMessageFunction( )( this.key
, this.parameters
);
164 if ( this.format
=== 'plain' ) {
167 if ( this.format
=== 'escaped' ) {
168 // According to Message.php this needs {{-transformation, which is
170 return mw
.html
.escape( text
);
173 /* This should be fixed up when we have a parser
174 if ( this.format === 'parse' && 'language' in mw ) {
175 text = mw.language.parse( text );
182 * Changes format to parse and converts message to string
184 * @return {string} String form of parsed message
187 this.format
= 'parse';
188 return this.toString();
192 * Changes format to plain and converts message to string
194 * @return {string} String form of plain message
197 this.format
= 'plain';
198 return this.toString();
202 * Changes the format to html escaped and converts message to string
204 * @return {string} String form of html escaped message
206 escaped: function() {
207 this.format
= 'escaped';
208 return this.toString();
212 * Checks if message exists
214 * @return {string} String form of parsed message
217 return this.map
.exists( this.key
);
225 * Dummy function which in debug mode can be replaced with a function that
226 * emulates console.log in console-less environments.
231 * @var constructor Make the Map constructor publicly available.
236 * List of configuration values
238 * Dummy placeholder. Initiated in startUp module as a new instance of mw.Map().
239 * If $wgLegacyJavaScriptGlobals is true, this Map will have its values
240 * in the global window object.
247 * Empty object that plugins can be installed in.
251 /* Extension points */
256 * Localization system
263 * Gets a message object, similar to wfMessage()
265 * @param key string Key of message to get
266 * @param parameter_1 mixed First argument in a list of variadic arguments,
267 * each a parameter for $N replacement in messages.
270 message: function ( key
, parameter_1
/* [, parameter_2] */ ) {
272 // Support variadic arguments
273 if ( parameter_1
!== undefined ) {
274 parameters
= $.makeArray( arguments
);
279 return new Message( mw
.messages
, key
, parameters
);
283 * Gets a message string, similar to wfMsg()
285 * @param key string Key of message to get
286 * @param parameters mixed First argument in a list of variadic arguments,
287 * each a parameter for $N replacement in messages.
290 msg: function ( key
, parameters
) {
291 return mw
.message
.apply( mw
.message
, arguments
).toString();
295 * Client-side module loader which integrates with the MediaWiki ResourceLoader
297 loader
: ( function() {
299 /* Private Members */
302 * Mapping of registered modules
304 * The jquery module is pre-registered, because it must have already
305 * been provided for this object to have been built, and in debug mode
306 * jquery would have been provided through a unique loader request,
307 * making it impossible to hold back registration of jquery until after
310 * For exact details on support for script, style and messages, look at
311 * mw.loader.implement.
316 * 'version': ############## (unix timestamp),
317 * 'dependencies': ['required.foo', 'bar.also', ...], (or) function() {}
318 * 'group': 'somegroup', (or) null,
319 * 'source': 'local', 'someforeignwiki', (or) null
320 * 'state': 'registered', 'loading', 'loaded', 'ready', or 'error'
323 * 'messages': { 'key': 'value' },
329 * Mapping of sources, keyed by source-id, values are objects.
333 * 'loadScript': 'http://foo.bar/w/load.php'
338 // List of modules which will be loaded as when ready
340 // List of modules to be loaded
342 // List of callback functions waiting for modules to be ready to be called
344 // Flag inidicating that document ready has occured
346 // Selector cache for the marker element. Use getMarker() to get/use the marker!
349 /* Cache document ready status */
351 $(document
).ready( function () {
355 /* Private methods */
357 function getMarker(){
362 $marker
= $( 'meta[name="ResourceLoaderDynamicStyles"]' );
363 if ( $marker
.length
) {
366 mw
.log( 'getMarker> No <meta name="ResourceLoaderDynamicStyles"> found, inserting dynamically.' );
367 $marker
= $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' );
372 function compare( a
, b
) {
374 if ( a
.length
!== b
.length
) {
377 for ( i
= 0; i
< b
.length
; i
+= 1 ) {
378 if ( $.isArray( a
[i
] ) ) {
379 if ( !compare( a
[i
], b
[i
] ) ) {
383 if ( a
[i
] !== b
[i
] ) {
391 * Generates an ISO8601 "basic" string from a UNIX timestamp
393 function formatVersionNumber( timestamp
) {
394 var pad = function ( a
, b
, c
) {
395 return [a
< 10 ? '0' + a
: a
, b
< 10 ? '0' + b
: b
, c
< 10 ? '0' + c
: c
].join( '' );
398 d
.setTime( timestamp
* 1000 );
400 pad( d
.getUTCFullYear(), d
.getUTCMonth() + 1, d
.getUTCDate() ), 'T',
401 pad( d
.getUTCHours(), d
.getUTCMinutes(), d
.getUTCSeconds() ), 'Z'
406 * Recursively resolves dependencies and detects circular references
408 function recurse( module
, resolved
, unresolved
) {
411 if ( registry
[module
] === undefined ) {
412 throw new Error( 'Unknown dependency: ' + module
);
414 // Resolves dynamic loader function and replaces it with its own results
415 if ( $.isFunction( registry
[module
].dependencies
) ) {
416 registry
[module
].dependencies
= registry
[module
].dependencies();
417 // Ensures the module's dependencies are always in an array
418 if ( typeof registry
[module
].dependencies
!== 'object' ) {
419 registry
[module
].dependencies
= [registry
[module
].dependencies
];
422 // Tracks down dependencies
423 deps
= registry
[module
].dependencies
;
425 for ( n
= 0; n
< len
; n
+= 1 ) {
426 if ( $.inArray( deps
[n
], resolved
) === -1 ) {
427 if ( $.inArray( deps
[n
], unresolved
) !== -1 ) {
429 'Circular reference detected: ' + module
+
433 recurse( deps
[n
], resolved
, unresolved
);
436 resolved
[resolved
.length
] = module
;
437 unresolved
.splice( $.inArray( module
, unresolved
), 1 );
441 * Gets a list of module names that a module depends on in their proper dependency order
443 * @param module string module name or array of string module names
444 * @return list of dependencies
445 * @throws Error if circular reference is detected
447 function resolve( module
) {
448 var modules
, m
, deps
, n
, resolved
;
450 // Allow calling with an array of module names
451 if ( $.isArray( module
) ) {
453 for ( m
= 0; m
< module
.length
; m
+= 1 ) {
454 deps
= resolve( module
[m
] );
455 for ( n
= 0; n
< deps
.length
; n
+= 1 ) {
456 modules
[modules
.length
] = deps
[n
];
460 } else if ( typeof module
=== 'string' ) {
461 // Undefined modules have no dependencies
462 if ( registry
[module
] === undefined ) {
466 recurse( module
, resolved
, [] );
469 throw new Error( 'Invalid module argument: ' + module
);
473 * Narrows a list of module names down to those matching a specific
474 * state. Possible states are 'undefined', 'registered', 'loading',
475 * 'loaded', or 'ready'
477 * @param states string or array of strings of module states to filter by
478 * @param modules array list of module names to filter (optional, all modules
479 * will be used by default)
480 * @return array list of filtered module names
482 function filter( states
, modules
) {
483 var list
, module
, s
, m
;
485 // Allow states to be given as a string
486 if ( typeof states
=== 'string' ) {
489 // If called without a list of modules, build and use a list of all modules
491 if ( modules
=== undefined ) {
493 for ( module
in registry
) {
494 modules
[modules
.length
] = module
;
497 // Build a list of modules which are in one of the specified states
498 for ( s
= 0; s
< states
.length
; s
+= 1 ) {
499 for ( m
= 0; m
< modules
.length
; m
+= 1 ) {
500 if ( registry
[modules
[m
]] === undefined ) {
501 // Module does not exist
502 if ( states
[s
] === 'undefined' ) {
504 list
[list
.length
] = modules
[m
];
507 // Module exists, check state
508 if ( registry
[modules
[m
]].state
=== states
[s
] ) {
510 list
[list
.length
] = modules
[m
];
519 * Automatically executes jobs and modules which are pending with satistifed dependencies.
521 * This is used when dependencies are satisfied, such as when a module is executed.
523 function handlePending( module
) {
527 // Run jobs who's dependencies have just been met
528 for ( j
= 0; j
< jobs
.length
; j
+= 1 ) {
530 filter( 'ready', jobs
[j
].dependencies
),
531 jobs
[j
].dependencies
) )
533 if ( $.isFunction( jobs
[j
].ready
) ) {
540 // Execute modules who's dependencies have just been met
541 for ( r
in registry
) {
542 if ( registry
[r
].state
=== 'loaded' ) {
544 filter( ['ready'], registry
[r
].dependencies
),
545 registry
[r
].dependencies
) )
552 // Run error callbacks of jobs affected by this condition
553 for ( j
= 0; j
< jobs
.length
; j
+= 1 ) {
554 if ( $.inArray( module
, jobs
[j
].dependencies
) !== -1 ) {
555 if ( $.isFunction( jobs
[j
].error
) ) {
556 jobs
[j
].error( e
, module
);
566 * Adds a script tag to the body, either using document.write or low-level DOM manipulation,
567 * depending on whether document-ready has occured yet.
569 * @param src String: URL to script, will be used as the src attribute in the script tag
570 * @param callback Function: Optional callback which will be run when the script is done
572 function addScript( src
, callback
) {
573 var done
= false, script
;
575 // jQuery's getScript method is NOT better than doing this the old-fashioned way
576 // because jQuery will eval the script's code, and errors will not have sane
578 script
= document
.createElement( 'script' );
579 script
.setAttribute( 'src', src
);
580 script
.setAttribute( 'type', 'text/javascript' );
581 if ( $.isFunction( callback
) ) {
582 // Attach handlers for all browsers (based on jQuery.ajax)
583 script
.onload
= script
.onreadystatechange = function() {
589 || /loaded|complete/.test( script
.readyState
)
595 // Handle memory leak in IE
596 script
.onload
= script
.onreadystatechange
= null;
600 if ( script
.parentNode
) {
601 script
.parentNode
.removeChild( script
);
604 // Dereference the script
609 document
.body
.appendChild( script
);
611 document
.write( mw
.html
.element(
612 'script', { 'type': 'text/javascript', 'src': src
}, ''
614 if ( $.isFunction( callback
) ) {
615 // Document.write is synchronous, so this is called when it's done
622 * Executes a loaded module, making it ready to use
624 * @param module string module name to execute
626 function execute( module
, callback
) {
627 var style
, media
, i
, script
, markModuleReady
, nestedAddScript
;
629 if ( registry
[module
] === undefined ) {
630 throw new Error( 'Module has not been registered yet: ' + module
);
631 } else if ( registry
[module
].state
=== 'registered' ) {
632 throw new Error( 'Module has not been requested from the server yet: ' + module
);
633 } else if ( registry
[module
].state
=== 'loading' ) {
634 throw new Error( 'Module has not completed loading yet: ' + module
);
635 } else if ( registry
[module
].state
=== 'ready' ) {
636 throw new Error( 'Module has already been loaded: ' + module
);
640 if ( $.isPlainObject( registry
[module
].style
) ) {
641 for ( media
in registry
[module
].style
) {
642 style
= registry
[module
].style
[media
];
643 if ( $.isArray( style
) ) {
644 for ( i
= 0; i
< style
.length
; i
+= 1 ) {
645 getMarker().before( mw
.html
.element( 'link', {
652 } else if ( typeof style
=== 'string' ) {
653 getMarker().before( mw
.html
.element( 'style', {
656 }, new mw
.html
.Cdata( style
) ) );
660 // Add localizations to message system
661 if ( $.isPlainObject( registry
[module
].messages
) ) {
662 mw
.messages
.set( registry
[module
].messages
);
666 script
= registry
[module
].script
;
667 markModuleReady = function() {
668 registry
[module
].state
= 'ready';
669 handlePending( module
);
670 if ( $.isFunction( callback
) ) {
674 nestedAddScript = function ( arr
, callback
, i
) {
675 // Recursively call addScript() in its own callback
676 // for each element of arr.
677 if ( i
>= arr
.length
) {
678 // We're at the end of the array
683 addScript( arr
[i
], function() {
684 nestedAddScript( arr
, callback
, i
+ 1 );
688 if ( $.isArray( script
) ) {
689 registry
[module
].state
= 'loading';
690 nestedAddScript( script
, markModuleReady
, 0 );
691 } else if ( $.isFunction( script
) ) {
696 // This needs to NOT use mw.log because these errors are common in production mode
697 // and not in debug mode, such as when a symbol that should be global isn't exported
698 if ( window
.console
&& typeof window
.console
.log
=== 'function' ) {
699 console
.log( 'mw.loader::execute> Exception thrown by ' + module
+ ': ' + e
.message
);
701 registry
[module
].state
= 'error';
707 * Adds a dependencies to the queue with optional callbacks to be run
708 * when the dependencies are ready or fail
710 * @param dependencies string module name or array of string module names
711 * @param ready function callback to execute when all dependencies are ready
712 * @param error function callback to execute when any dependency fails
714 function request( dependencies
, ready
, error
) {
715 var regItemDeps
, regItemDepLen
, n
;
717 // Allow calling by single module name
718 if ( typeof dependencies
=== 'string' ) {
719 dependencies
= [dependencies
];
720 if ( registry
[dependencies
[0]] !== undefined ) {
721 // Cache repetitively accessed deep level object member
722 regItemDeps
= registry
[dependencies
[0]].dependencies
;
723 // Cache to avoid looped access to length property
724 regItemDepLen
= regItemDeps
.length
;
725 for ( n
= 0; n
< regItemDepLen
; n
+= 1 ) {
726 dependencies
[dependencies
.length
] = regItemDeps
[n
];
730 // Add ready and error callbacks if they were given
731 if ( arguments
.length
> 1 ) {
732 jobs
[jobs
.length
] = {
733 'dependencies': filter(
734 ['undefined', 'registered', 'loading', 'loaded'],
741 // Queue up any dependencies that are undefined or registered
742 dependencies
= filter( ['undefined', 'registered'], dependencies
);
743 for ( n
= 0; n
< dependencies
.length
; n
+= 1 ) {
744 if ( $.inArray( dependencies
[n
], queue
) === -1 ) {
745 queue
[queue
.length
] = dependencies
[n
];
752 function sortQuery(o
) {
753 var sorted
= {}, key
, a
= [];
755 if ( hasOwn
.call( o
, key
) ) {
760 for ( key
= 0; key
< a
.length
; key
+= 1 ) {
761 sorted
[a
[key
]] = o
[a
[key
]];
767 * Converts a module map of the form { foo: [ 'bar', 'baz' ], bar: [ 'baz, 'quux' ] }
768 * to a query string of the form foo.bar,baz|bar.baz,quux
770 function buildModulesString( moduleMap
) {
771 var arr
= [], p
, prefix
;
772 for ( prefix
in moduleMap
) {
773 p
= prefix
=== '' ? '' : prefix
+ '.';
774 arr
.push( p
+ moduleMap
[prefix
].join( ',' ) );
776 return arr
.join( '|' );
780 * Asynchronously append a script tag to the end of the body
781 * that invokes load.php
782 * @param moduleMap {Object}: Module map, see buildModulesString()
783 * @param currReqBase {Object}: Object with other parameters (other than 'modules') to use in the request
784 * @param sourceLoadScript {String}: URL of load.php
786 function doRequest( moduleMap
, currReqBase
, sourceLoadScript
) {
787 var request
= $.extend(
788 { 'modules': buildModulesString( moduleMap
) },
791 request
= sortQuery( request
);
792 // Asynchronously append a script tag to the end of the body
793 // Append &* to avoid triggering the IE6 extension check
794 addScript( sourceLoadScript
+ '?' + $.param( request
) + '&*' );
800 * Requests dependencies from server, loading and executing when things when ready.
803 var reqBase
, splits
, maxQueryLength
, q
, b
, bSource
, bGroup
, bSourceGroup
,
804 source
, group
, g
, i
, modules
, maxVersion
, sourceLoadScript
,
805 currReqBase
, currReqBaseLength
, moduleMap
, l
,
806 lastDotIndex
, prefix
, suffix
, bytesAdded
;
808 // Build a list of request parameters common to all requests.
810 skin
: mw
.config
.get( 'skin' ),
811 lang
: mw
.config
.get( 'wgUserLanguage' ),
812 debug
: mw
.config
.get( 'debug' )
814 // Split module batch by source and by group.
816 maxQueryLength
= mw
.config
.get( 'wgResourceLoaderMaxQueryLength', -1 );
818 // Appends a list of modules from the queue to the batch
819 for ( q
= 0; q
< queue
.length
; q
+= 1 ) {
820 // Only request modules which are undefined or registered
821 if ( registry
[queue
[q
]] === undefined || registry
[queue
[q
]].state
=== 'registered' ) {
822 // Prevent duplicate entries
823 if ( $.inArray( queue
[q
], batch
) === -1 ) {
824 batch
[batch
.length
] = queue
[q
];
825 // Mark registered modules as loading
826 if ( registry
[queue
[q
]] !== undefined ) {
827 registry
[queue
[q
]].state
= 'loading';
832 // Early exit if there's nothing to load...
833 if ( !batch
.length
) {
837 // The queue has been processed into the batch, clear up the queue.
840 // Always order modules alphabetically to help reduce cache
841 // misses for otherwise identical content.
844 // Split batch by source and by group.
845 for ( b
= 0; b
< batch
.length
; b
+= 1 ) {
846 bSource
= registry
[batch
[b
]].source
;
847 bGroup
= registry
[batch
[b
]].group
;
848 if ( splits
[bSource
] === undefined ) {
849 splits
[bSource
] = {};
851 if ( splits
[bSource
][bGroup
] === undefined ) {
852 splits
[bSource
][bGroup
] = [];
854 bSourceGroup
= splits
[bSource
][bGroup
];
855 bSourceGroup
[bSourceGroup
.length
] = batch
[b
];
858 // Clear the batch - this MUST happen before we append any
859 // script elements to the body or it's possible that a script
860 // will be locally cached, instantly load, and work the batch
861 // again, all before we've cleared it causing each request to
862 // include modules which are already loaded.
865 for ( source
in splits
) {
867 sourceLoadScript
= sources
[source
].loadScript
;
869 for ( group
in splits
[source
] ) {
871 // Cache access to currently selected list of
872 // modules for this group from this source.
873 modules
= splits
[source
][group
];
875 // Calculate the highest timestamp
877 for ( g
= 0; g
< modules
.length
; g
+= 1 ) {
878 if ( registry
[modules
[g
]].version
> maxVersion
) {
879 maxVersion
= registry
[modules
[g
]].version
;
883 currReqBase
= $.extend( { 'version': formatVersionNumber( maxVersion
) }, reqBase
);
884 currReqBaseLength
= $.param( currReqBase
).length
;
886 // We may need to split up the request to honor the query string length limit,
887 // so build it piece by piece.
888 l
= currReqBaseLength
+ 9; // '&modules='.length == 9
890 moduleMap
= {}; // { prefix: [ suffixes ] }
892 for ( i
= 0; i
< modules
.length
; i
+= 1 ) {
893 // Determine how many bytes this module would add to the query string
894 lastDotIndex
= modules
[i
].lastIndexOf( '.' );
895 // Note that these substr() calls work even if lastDotIndex == -1
896 prefix
= modules
[i
].substr( 0, lastDotIndex
);
897 suffix
= modules
[i
].substr( lastDotIndex
+ 1 );
898 bytesAdded
= moduleMap
[prefix
] !== undefined
899 ? suffix
.length
+ 3 // '%2C'.length == 3
900 : modules
[i
].length
+ 3; // '%7C'.length == 3
902 // If the request would become too long, create a new one,
903 // but don't create empty requests
904 if ( maxQueryLength
> 0 && !$.isEmptyObject( moduleMap
) && l
+ bytesAdded
> maxQueryLength
) {
905 // This request would become too long, create a new one
906 // and fire off the old one
907 doRequest( moduleMap
, currReqBase
, sourceLoadScript
);
909 l
= currReqBaseLength
+ 9;
911 if ( moduleMap
[prefix
] === undefined ) {
912 moduleMap
[prefix
] = [];
914 moduleMap
[prefix
].push( suffix
);
917 // If there's anything left in moduleMap, request that too
918 if ( !$.isEmptyObject( moduleMap
) ) {
919 doRequest( moduleMap
, currReqBase
, sourceLoadScript
);
928 * @param id {String}: Short lowercase a-Z string representing a source, only used internally.
929 * @param props {Object}: Object containing only the loadScript property which is a url to
930 * the load.php location of the source.
933 addSource: function ( id
, props
) {
935 // Allow multiple additions
936 if ( typeof id
=== 'object' ) {
937 for ( source
in id
) {
938 mw
.loader
.addSource( source
, id
[source
] );
943 if ( sources
[id
] !== undefined ) {
944 throw new Error( 'source already registered: ' + id
);
953 * Registers a module, letting the system know about it and its
954 * properties. Startup modules contain calls to this function.
956 * @param module {String}: Module name
957 * @param version {Number}: Module version number as a timestamp (falls backs to 0)
958 * @param dependencies {String|Array|Function}: One string or array of strings of module
959 * names on which this module depends, or a function that returns that array.
960 * @param group {String}: Group which the module is in (optional, defaults to null)
961 * @param source {String}: Name of the source. Defaults to local.
963 register: function ( module
, version
, dependencies
, group
, source
) {
965 // Allow multiple registration
966 if ( typeof module
=== 'object' ) {
967 for ( m
= 0; m
< module
.length
; m
+= 1 ) {
968 // module is an array of module names
969 if ( typeof module
[m
] === 'string' ) {
970 mw
.loader
.register( module
[m
] );
971 // module is an array of arrays
972 } else if ( typeof module
[m
] === 'object' ) {
973 mw
.loader
.register
.apply( mw
.loader
, module
[m
] );
979 if ( typeof module
!== 'string' ) {
980 throw new Error( 'module must be a string, not a ' + typeof module
);
982 if ( registry
[module
] !== undefined ) {
983 throw new Error( 'module already implemented: ' + module
);
985 // List the module as registered
987 'version': version
!== undefined ? parseInt( version
, 10 ) : 0,
989 'group': typeof group
=== 'string' ? group
: null,
990 'source': typeof source
=== 'string' ? source
: 'local',
991 'state': 'registered'
993 if ( typeof dependencies
=== 'string' ) {
994 // Allow dependencies to be given as a single module name
995 registry
[module
].dependencies
= [dependencies
];
996 } else if ( typeof dependencies
=== 'object' || $.isFunction( dependencies
) ) {
997 // Allow dependencies to be given as an array of module names
998 // or a function which returns an array
999 registry
[module
].dependencies
= dependencies
;
1004 * Implements a module, giving the system a course of action to take
1005 * upon loading. Results of a request for one or more modules contain
1006 * calls to this function.
1008 * All arguments are required.
1010 * @param module String: Name of module
1011 * @param script Mixed: Function of module code or String of URL to be used as the src
1012 * attribute when adding a script element to the body
1013 * @param style Object: Object of CSS strings keyed by media-type or Object of lists of URLs
1014 * keyed by media-type
1015 * @param msgs Object: List of key/value pairs to be passed through mw.messages.set
1017 implement: function ( module
, script
, style
, msgs
) {
1019 if ( typeof module
!== 'string' ) {
1020 throw new Error( 'module must be a string, not a ' + typeof module
);
1022 if ( !$.isFunction( script
) && !$.isArray( script
) ) {
1023 throw new Error( 'script must be a function or an array, not a ' + typeof script
);
1025 if ( !$.isPlainObject( style
) ) {
1026 throw new Error( 'style must be an object, not a ' + typeof style
);
1028 if ( !$.isPlainObject( msgs
) ) {
1029 throw new Error( 'msgs must be an object, not a ' + typeof msgs
);
1031 // Automatically register module
1032 if ( registry
[module
] === undefined ) {
1033 mw
.loader
.register( module
);
1035 // Check for duplicate implementation
1036 if ( registry
[module
] !== undefined && registry
[module
].script
!== undefined ) {
1037 throw new Error( 'module already implemented: ' + module
);
1039 // Mark module as loaded
1040 registry
[module
].state
= 'loaded';
1041 // Attach components
1042 registry
[module
].script
= script
;
1043 registry
[module
].style
= style
;
1044 registry
[module
].messages
= msgs
;
1045 // Execute or queue callback
1047 filter( ['ready'], registry
[module
].dependencies
),
1048 registry
[module
].dependencies
) )
1057 * Executes a function as soon as one or more required modules are ready
1059 * @param dependencies {String|Array} Module name or array of modules names the callback
1060 * dependends on to be ready before executing
1061 * @param ready {Function} callback to execute when all dependencies are ready (optional)
1062 * @param error {Function} callback to execute when if dependencies have a errors (optional)
1064 using: function ( dependencies
, ready
, error
) {
1065 var tod
= typeof dependencies
;
1067 if ( tod
!== 'object' && tod
!== 'string' ) {
1068 throw new Error( 'dependencies must be a string or an array, not a ' + tod
);
1070 // Allow calling with a single dependency as a string
1071 if ( tod
=== 'string' ) {
1072 dependencies
= [dependencies
];
1074 // Resolve entire dependency map
1075 dependencies
= resolve( dependencies
);
1076 // If all dependencies are met, execute ready immediately
1077 if ( compare( filter( ['ready'], dependencies
), dependencies
) ) {
1078 if ( $.isFunction( ready
) ) {
1082 // If any dependencies have errors execute error immediately
1083 else if ( filter( ['error'], dependencies
).length
) {
1084 if ( $.isFunction( error
) ) {
1085 error( new Error( 'one or more dependencies have state "error"' ),
1089 // Since some dependencies are not yet ready, queue up a request
1091 request( dependencies
, ready
, error
);
1096 * Loads an external script or one or more modules for future use
1098 * @param modules {mixed} Either the name of a module, array of modules,
1099 * or a URL of an external script or style
1100 * @param type {String} mime-type to use if calling with a URL of an
1101 * external script or style; acceptable values are "text/css" and
1102 * "text/javascript"; if no type is provided, text/javascript is assumed.
1104 load: function ( modules
, type
) {
1106 if ( typeof modules
!== 'object' && typeof modules
!== 'string' ) {
1107 throw new Error( 'modules must be a string or an array, not a ' + typeof modules
);
1109 // Allow calling with an external script or single dependency as a string
1110 if ( typeof modules
=== 'string' ) {
1111 // Support adding arbitrary external scripts
1112 if ( /^(https?:)?\/\//.test( modules
) ) {
1113 if ( type
=== 'text/css' ) {
1114 $( 'head' ).append( $( '<link/>', {
1120 } else if ( type
=== 'text/javascript' || type
=== undefined ) {
1121 addScript( modules
);
1127 // Called with single module
1128 modules
= [modules
];
1130 // Resolve entire dependency map
1131 modules
= resolve( modules
);
1132 // If all modules are ready, nothing dependency be done
1133 if ( compare( filter( ['ready'], modules
), modules
) ) {
1136 // If any modules have errors return false
1137 else if ( filter( ['error'], modules
).length
) {
1140 // Since some modules are not yet ready, queue up a request
1148 * Changes the state of a module
1150 * @param module {String|Object} module name or object of module name/state pairs
1151 * @param state {String} state name
1153 state: function ( module
, state
) {
1155 if ( typeof module
=== 'object' ) {
1156 for ( m
in module
) {
1157 mw
.loader
.state( m
, module
[m
] );
1161 if ( registry
[module
] === undefined ) {
1162 mw
.loader
.register( module
);
1164 registry
[module
].state
= state
;
1168 * Gets the version of a module
1170 * @param module string name of module to get version for
1172 getVersion: function ( module
) {
1173 if ( registry
[module
] !== undefined && registry
[module
].version
!== undefined ) {
1174 return formatVersionNumber( registry
[module
].version
);
1180 * @deprecated since 1.18 use mw.loader.getVersion() instead
1182 version: function () {
1183 return mw
.loader
.getVersion
.apply( mw
.loader
, arguments
);
1187 * Gets the state of a module
1189 * @param module string name of module to get state for
1191 getState: function ( module
) {
1192 if ( registry
[module
] !== undefined && registry
[module
].state
!== undefined ) {
1193 return registry
[module
].state
;
1199 * Get names of all registered modules.
1203 getModuleNames: function () {
1204 return $.map( registry
, function ( i
, key
) {
1210 * For backwards-compatibility with Squid-cached pages. Loads mw.user
1213 mw
.loader
.load( 'mediawiki.user' );
1218 /** HTML construction helper functions */
1219 html
: ( function () {
1220 function escapeCallback( s
) {
1237 * Escape a string for HTML. Converts special characters to HTML entities.
1238 * @param s The string to escape
1240 escape: function ( s
) {
1241 return s
.replace( /['"<>&]/g, escapeCallback
);
1245 * Wrapper object for raw HTML passed to mw.html.element().
1248 Raw: function ( value
) {
1253 * Wrapper object for CDATA element contents passed to mw.html.element()
1256 Cdata: function ( value
) {
1261 * Create an HTML element string, with safe escaping.
1263 * @param name The tag name.
1264 * @param attrs An object with members mapping element names to values
1265 * @param contents The contents of the element. May be either:
1266 * - string: The string is escaped.
1267 * - null or undefined: The short closing form is used, e.g. <br/>.
1268 * - this.Raw: The value attribute is included without escaping.
1269 * - this.Cdata: The value attribute is included, and an exception is
1270 * thrown if it contains an illegal ETAGO delimiter.
1271 * See http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.3.2
1275 * return h.element( 'div', {},
1276 * new h.Raw( h.element( 'img', {src: '<'} ) ) );
1277 * Returns <div><img src="<"/></div>
1279 element: function ( name
, attrs
, contents
) {
1280 var v
, attrName
, s
= '<' + name
;
1282 for ( attrName
in attrs
) {
1283 v
= attrs
[attrName
];
1284 // Convert name=true, to name=name
1288 } else if ( v
=== false ) {
1291 s
+= ' ' + attrName
+ '="' + this.escape( String( v
) ) + '"';
1293 if ( contents
=== undefined || contents
=== null ) {
1300 switch ( typeof contents
) {
1303 s
+= this.escape( contents
);
1307 // Convert to string
1308 s
+= String( contents
);
1311 if ( contents
instanceof this.Raw
) {
1312 // Raw HTML inclusion
1313 s
+= contents
.value
;
1314 } else if ( contents
instanceof this.Cdata
) {
1316 if ( /<\/[a-zA-z]/.test( contents
.value
) ) {
1317 throw new Error( 'mw.html.element: Illegal end tag found in CDATA' );
1319 s
+= contents
.value
;
1321 throw new Error( 'mw.html.element: Invalid type of contents' );
1324 s
+= '</' + name
+ '>';
1333 // Alias $j to jQuery for backwards compatibility
1336 // Attach to window and globally alias
1337 window
.mw
= window
.mediaWiki
= mw
;
1339 // Auto-register from pre-loaded startup scripts
1340 if ( typeof startUp
!== 'undefined' && jQuery
.isFunction( startUp
) ) {
1342 startUp
= undefined;