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/*
* Core MediaWiki JavaScript Library
*/
var mw = ( function ( $, undefined ) {
'use strict';
/* Private Members */
var hasOwn = Object.prototype.hasOwnProperty,
slice = Array.prototype.slice;
/* Object constructors */
/**
* Creates an object that can be read from or written to from prototype functions
* that allow both single and multiple variables at once.
* @class mw.Map
*
* @constructor
* @param {boolean} global Whether to store the values in the global window
* object or a exclusively in the object property 'values'.
*/
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 {string|Object|null} Values as a string or object, null if invalid/inexistant.
*/
get: function ( selection, fallback ) {
var results, i;
// If we only do this in the `return` block, it'll fail for the
// call to get() from the mutli-selection block.
fallback = arguments.length > 1 ? fallback : null;
if ( $.isArray( selection ) ) {
selection = slice.call( selection );
results = {};
for ( i = 0; i < selection.length; i++ ) {
results[selection[i]] = this.get( selection[i], fallback );
}
return results;
}
if ( typeof selection === 'string' ) {
if ( !hasOwn.call( this.values, selection ) ) {
return fallback;
}
return this.values[selection];
}
if ( selection === undefined ) {
return this.values;
}
// invalid selection key
return null;
},
/**
* 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 {Boolean} This returns true on success, false on failure.
*/
set: function ( selection, value ) {
var s;
if ( $.isPlainObject( selection ) ) {
for ( s in selection ) {
this.values[s] = selection[s];
}
return true;
}
if ( typeof selection === 'string' && arguments.length > 1 ) {
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 ) {
var s;
if ( $.isArray( selection ) ) {
for ( s = 0; s < selection.length; s++ ) {
if ( typeof selection[s] !== 'string' || !hasOwn.call( this.values, selection[s] ) ) {
return false;
}
}
return true;
}
return typeof selection === 'string' && hasOwn.call( this.values, selection );
}
};
/**
* Object constructor for messages,
* similar to the Message class in MediaWiki PHP.
* @class mw.Message
*
* @constructor
* @param {mw.Map} map Message storage
* @param {string} key
* @param {Array} [parameters]
*/
function Message( map, key, parameters ) {
this.format = 'text';
this.map = map;
this.key = key;
this.parameters = parameters === undefined ? [] : slice.call( parameters );
return this;
}
Message.prototype = {
/**
* Simple message parser, does $N replacement, HTML-escaping (only for
* 'escaped' format), and nothing else.
*
* This may be overridden to provide a more complex message parser.
*
* The primary override is in mediawiki.jqueryMsg.
*
* This function will not be called for nonexistent messages.
*/
parser: function () {
var parameters = this.parameters;
return this.map.get( this.key ).replace( /\$(\d+)/g, function ( str, match ) {
var index = parseInt( match, 10 ) - 1;
return parameters[index] !== undefined ? parameters[index] : '$' + match;
} );
},
/**
* Appends (does not replace) parameters for replacement to the .parameters property.
*
* @param {Array} parameters
* @chainable
*/
params: function ( parameters ) {
var i;
for ( i = 0; i < parameters.length; i += 1 ) {
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 () {
var text;
if ( !this.exists() ) {
// Use <key> as text if key does not exist
if ( this.format === 'escaped' || this.format === 'parse' ) {
// format 'escaped' and 'parse' need to have the brackets and key html escaped
return mw.html.escape( '<' + this.key + '>' );
}
return '<' + this.key + '>';
}
if ( this.format === 'plain' || this.format === 'text' || this.format === 'parse' ) {
text = this.parser();
}
if ( this.format === 'escaped' ) {
text = this.parser();
text = mw.html.escape( text );
}
return text;
},
/**
* Changes format to 'parse' and converts message to string
*
* If jqueryMsg is loaded, this parses the message text from wikitext
* (where supported) to HTML
*
* Otherwise, it is equivalent to plain.
*
* @return {string} String form of parsed message
*/
parse: function () {
this.format = 'parse';
return this.toString();
},
/**
* Changes format to 'plain' and converts message to string
*
* This substitutes parameters, but otherwise does not change the
* message text.
*
* @return {string} String form of plain message
*/
plain: function () {
this.format = 'plain';
return this.toString();
},
/**
* Changes format to 'text' and converts message to string
*
* If jqueryMsg is loaded, {{-transformation is done where supported
* (such as {{plural:}}, {{gender:}}, {{int:}}).
*
* Otherwise, it is equivalent to plain.
*/
text: function () {
this.format = 'text';
return this.toString();
},
/**
* Changes the format to 'escaped' and converts message to string
*
* This is equivalent to using the 'text' format (see text method), then
* HTML-escaping the output.
*
* @return {string} String form of html escaped message
*/
escaped: function () {
this.format = 'escaped';
return this.toString();
},
/**
* Checks if message exists
*
* @see mw.Map#exists
* @return {boolean}
*/
exists: function () {
return this.map.exists( this.key );
}
};
/**
* @class mw
* @alternateClassName mediaWiki
* @singleton
*/
return {
/* Public Members */
/**
* Dummy function which in debug mode can be replaced with a function that
* emulates console.log in console-less environments.
*/
log: function () { },
// Make the Map constructor publicly available.
Map: Map,
// Make the Message constructor publicly available.
Message: Message,
/**
* 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.
* @property
*/
config: null,
/**
* Empty object that plugins can be installed in.
* @property
*/
libs: {},
/* Extension points */
/**
* @property
*/
legacy: {},
/**
* Localization system
* @property {mw.Map}
*/
messages: new Map(),
/* Public Methods */
/**
* Gets a message object, similar to wfMessage().
*
* @param {string} key Key of message to get
* @param {Mixed...} parameters Parameters for the $N replacements in messages.
* @return {mw.Message}
*/
message: function ( key ) {
// Variadic arguments
var parameters = slice.call( arguments, 1 );
return new Message( mw.messages, key, parameters );
},
/**
* Gets a message string, similar to wfMessage()
*
* @see mw.Message#toString
* @param {string} key Key of message to get
* @param {Mixed...} parameters Parameters for the $N replacements in messages.
* @return {string}
*/
msg: function ( /* key, parameters... */ ) {
return mw.message.apply( mw.message, arguments ).toString();
},
/**
* Client-side module loader which integrates with the MediaWiki ResourceLoader
* @class mw.loader
* @singleton
*/
loader: ( 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', 'loaded', 'loading', 'ready', 'error' or 'missing'
* 'script': ...,
* 'style': ...,
* 'messages': { 'key': 'value' },
* }
* }
*
* @property
* @private
*/
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 = [],
// Selector cache for the marker element. Use getMarker() to get/use the marker!
$marker = null,
// Buffer for addEmbeddedCSS.
cssBuffer = '',
// Callbacks for addEmbeddedCSS.
cssCallbacks = $.Callbacks();
/* Private methods */
function getMarker() {
// Cached ?
if ( $marker ) {
return $marker;
}
$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;
}
/**
* Create a new style tag and add it to the DOM.
*
* @private
* @param {string} text CSS text
* @param {Mixed} [nextnode] An Element or jQuery object for an element where
* the style tag should be inserted before. Otherwise appended to the `<head>`.
* @return {HTMLElement} Node reference to the created `<style>` tag.
*/
function addStyleTag( text, nextnode ) {
var s = document.createElement( 'style' );
// Insert into document before setting cssText (bug 33305)
if ( nextnode ) {
// Must be inserted with native insertBefore, not $.fn.before.
// When using jQuery to insert it, like $nextnode.before( s ),
// then IE6 will throw "Access is denied" when trying to append
// to .cssText later. Some kind of weird security measure.
// http://stackoverflow.com/q/12586482/319266
// Works: jsfiddle.net/zJzMy/1
// Fails: jsfiddle.net/uJTQz
// Works again: http://jsfiddle.net/Azr4w/ (diff: the next 3 lines)
if ( nextnode.jquery ) {
nextnode = nextnode.get( 0 );
}
nextnode.parentNode.insertBefore( s, nextnode );
} else {
document.getElementsByTagName( 'head' )[0].appendChild( s );
}
if ( s.styleSheet ) {
// IE
s.styleSheet.cssText = text;
} else {
// Other browsers.
// (Safari sometimes borks on non-string values,
// play safe by casting to a string, just in case.)
s.appendChild( document.createTextNode( String( text ) ) );
}
return s;
}
/**
* Checks whether it is safe to add this css to a stylesheet.
*
* @private
* @param {string} cssText
* @return {boolean} False if a new one must be created.
*/
function canExpandStylesheetWith( cssText ) {
// Makes sure that cssText containing `@import`
// rules will end up in a new stylesheet (as those only work when
// placed at the start of a stylesheet; bug 35562).
return cssText.indexOf( '@import' ) === -1;
}
/**
* @param {string} [cssText=cssBuffer] If called without cssText,
* the internal buffer will be inserted instead.
* @param {Function} [callback]
*/
function addEmbeddedCSS( cssText, callback ) {
var $style, styleEl;
if ( callback ) {
cssCallbacks.add( callback );
}
// Yield once before inserting the <style> tag. There are likely
// more calls coming up which we can combine this way.
// Appending a stylesheet and waiting for the browser to repaint
// is fairly expensive, this reduces it (bug 45810)
if ( cssText ) {
// Be careful not to extend the buffer with css that needs a new stylesheet
if ( !cssBuffer || canExpandStylesheetWith( cssText ) ) {
// Linebreak for somewhat distinguishable sections
// (the rl-cachekey comment separating each)
cssBuffer += '\n' + cssText;
// TODO: Use requestAnimationFrame in the future which will
// perform even better by not injecting styles while the browser
// is paiting.
setTimeout( function () {
// Can't pass addEmbeddedCSS to setTimeout directly because Firefox
// (below version 13) has the non-standard behaviour of passing a
// numerical "lateness" value as first argument to this callback
// http://benalman.com/news/2009/07/the-mysterious-firefox-settime/
addEmbeddedCSS();
} );
return;
}
// This is a delayed call and we got a buffer still
} else if ( cssBuffer ) {
cssText = cssBuffer;
cssBuffer = '';
} else {
// This is a delayed call, but buffer is already cleared by
// another delayed call.
return;
}
// By default, always create a new <style>. Appending text
// to a <style> tag means the contents have to be re-parsed (bug 45810).
// Except, of course, in IE below 9, in there we default to
// re-using and appending to a <style> tag due to the
// IE stylesheet limit (bug 31676).
if ( 'documentMode' in document && document.documentMode <= 9 ) {
$style = getMarker().prev();
// Verify that the the element before Marker actually is a
// <style> tag and one that came from ResourceLoader
// (not some other style tag or even a `<meta>` or `<script>`).
if ( $style.data( 'ResourceLoaderDynamicStyleTag' ) === true ) {
// There's already a dynamic <style> tag present and
// canExpandStylesheetWith() gave a green light to append more to it.
styleEl = $style.get( 0 );
if ( styleEl.styleSheet ) {
try {
styleEl.styleSheet.cssText += cssText; // IE
} catch ( e ) {
log( 'addEmbeddedCSS fail\ne.message: ' + e.message, e );
}
} else {
styleEl.appendChild( document.createTextNode( String( cssText ) ) );
}
cssCallbacks.fire().empty();
return;
}
}
$( addStyleTag( cssText, getMarker() ) ).data( 'ResourceLoaderDynamicStyleTag', true );
cssCallbacks.fire().empty();
}
/**
* Generates an ISO8601 "basic" string from a UNIX timestamp
* @private
*/
function formatVersionNumber( timestamp ) {
var d = new Date();
function pad( a, b, c ) {
return [a < 10 ? '0' + a : a, b < 10 ? '0' + b : b, c < 10 ? '0' + c : c].join( '' );
}
d.setTime( timestamp * 1000 );
return [
pad( d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate() ), 'T',
pad( d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds() ), 'Z'
].join( '' );
}
/**
* Resolves dependencies and detects circular references.
*
* @private
* @param {string} module Name of the top-level module whose dependencies shall be
* resolved and sorted.
* @param {Array} resolved Returns a topological sort of the given module and its
* dependencies, such that later modules depend on earlier modules. The array
* contains the module names. If the array contains already some module names,
* this function appends its result to the pre-existing array.
* @param {Object} [unresolved] Hash used to track the current dependency
* chain; used to report loops in the dependency graph.
* @throws {Error} If any unregistered module or a dependency loop is encountered
*/
function sortDependencies( module, resolved, unresolved ) {
var n, deps, len;
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];
}
}
if ( $.inArray( module, resolved ) !== -1 ) {
// Module already resolved; nothing to do.
return;
}
// unresolved is optional, supply it if not passed in
if ( !unresolved ) {
unresolved = {};
}
// Tracks down dependencies
deps = registry[module].dependencies;
len = deps.length;
for ( n = 0; n < len; n += 1 ) {
if ( $.inArray( deps[n], resolved ) === -1 ) {
if ( unresolved[deps[n]] ) {
throw new Error(
'Circular reference detected: ' + module +
' -> ' + deps[n]
);
}
// Add to unresolved
unresolved[module] = true;
sortDependencies( deps[n], resolved, unresolved );
delete unresolved[module];
}
}
resolved[resolved.length] = module;
}
/**
* Gets a list of module names that a module depends on in their proper dependency
* order.
*
* @private
* @param {string} module Module name or array of string module names
* @return {Array} list of dependencies, including 'module'.
* @throws {Error} If circular reference is detected
*/
function resolve( module ) {
var m, resolved;
// Allow calling with an array of module names
if ( $.isArray( module ) ) {
resolved = [];
for ( m = 0; m < module.length; m += 1 ) {
sortDependencies( module[m], resolved );
}
return resolved;
}
if ( typeof module === 'string' ) {
resolved = [];
sortDependencies( module, resolved );
return resolved;
}
throw new Error( 'Invalid module argument: ' + module );
}
/**
* Narrows a list of module names down to those matching a specific
* state (see comment on top of this scope for a list of valid states).
* One can also filter for 'unregistered', which will return the
* modules names that don't have a registry entry.
*
* @private
* @param {string|string[]} states Module states to filter by
* @param {Array} modules List of module names to filter (optional, by default the entire
* registry is used)
* @return {Array} List of filtered module names
*/
function filter( states, modules ) {
var list, module, s, m;
// 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
list = [];
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 ( s = 0; s < states.length; s += 1 ) {
for ( m = 0; m < modules.length; m += 1 ) {
if ( registry[modules[m]] === undefined ) {
// Module does not exist
if ( states[s] === 'unregistered' ) {
// 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;
}
/**
* Determine whether all dependencies are in state 'ready', which means we may
* execute the module or job now.
*
* @private
* @param {Array} dependencies Dependencies (module names) to be checked.
* @return {boolean} True if all dependencies are in state 'ready', false otherwise
*/
function allReady( dependencies ) {
return filter( 'ready', dependencies ).length === dependencies.length;
}
/**
* Log a message to window.console, if possible. Useful to force logging of some
* errors that are otherwise hard to detect (I.e., this logs also in production mode).
* Gets console references in each invocation, so that delayed debugging tools work
* fine. No need for optimization here, which would only result in losing logs.
*
* @private
* @param {string} msg text for the log entry.
* @param {Error} [e]
*/
function log( msg, e ) {
var console = window.console;
if ( console && console.log ) {
console.log( msg );
// If we have an exception object, log it through .error() to trigger
// proper stacktraces in browsers that support it. There are no (known)
// browsers that don't support .error(), that do support .log() and
// have useful exception handling through .log().
if ( e && console.error ) {
console.error( e );
}
}
}
/**
* A module has entered state 'ready', 'error', or 'missing'. Automatically update pending jobs
* and modules that depend upon this module. if the given module failed, propagate the 'error'
* state up the dependency tree; otherwise, execute all jobs/modules that now have all their
* dependencies satisfied. On jobs depending on a failed module, run the error callback, if any.
*
* @private
* @param {string} module Name of module that entered one of the states 'ready', 'error', or 'missing'.
*/
function handlePending( module ) {
var j, job, hasErrors, m, stateChange;
// Modules.
if ( $.inArray( registry[module].state, ['error', 'missing'] ) !== -1 ) {
// If the current module failed, mark all dependent modules also as failed.
// Iterate until steady-state to propagate the error state upwards in the
// dependency tree.
do {
stateChange = false;
for ( m in registry ) {
if ( $.inArray( registry[m].state, ['error', 'missing'] ) === -1 ) {
if ( filter( ['error', 'missing'], registry[m].dependencies ).length > 0 ) {
registry[m].state = 'error';
stateChange = true;
}
}
}
} while ( stateChange );
}
// Execute all jobs whose dependencies are either all satisfied or contain at least one failed module.
for ( j = 0; j < jobs.length; j += 1 ) {
hasErrors = filter( ['error', 'missing'], jobs[j].dependencies ).length > 0;
if ( hasErrors || allReady( jobs[j].dependencies ) ) {
// All dependencies satisfied, or some have errors
job = jobs[j];
jobs.splice( j, 1 );
j -= 1;
try {
if ( hasErrors ) {
throw new Error( 'Module ' + module + ' failed.');
} else {
if ( $.isFunction( job.ready ) ) {
job.ready();
}
}
} catch ( e ) {
if ( $.isFunction( job.error ) ) {
try {
job.error( e, [module] );
} catch ( ex ) {
// A user-defined operation raised an exception. Swallow to protect
// our state machine!
log( 'Exception thrown by job.error()', ex );
}
}
}
}
}
if ( registry[module].state === 'ready' ) {
// The current module became 'ready'. Recursively execute all dependent modules that are loaded
// and now have all dependencies satisfied.
for ( m in registry ) {
if ( registry[m].state === 'loaded' && allReady( registry[m].dependencies ) ) {
execute( m );
}
}
}
}
/**
* Adds a script tag to the DOM, either using document.write or low-level DOM manipulation,
* depending on whether document-ready has occurred yet and whether we are in async mode.
*
* @private
* @param {string} src URL to script, will be used as the src attribute in the script tag
* @param {Function} [callback] Callback which will be run when the script is done
*/
function addScript( src, callback, async ) {
/*jshint evil:true */
var script, head,
done = false;
// Using isReady directly instead of storing it locally from
// a $.fn.ready callback (bug 31895).
if ( $.isReady || async ) {
// Can't use jQuery.getScript because that only uses <script> for cross-domain,
// it uses XHR and eval for same-domain scripts, which we don't want because it
// messes up line numbers.
// The below is based on jQuery ([jquery@1.8.2]/src/ajax/script.js)
// IE-safe way of getting the <head>. document.head isn't supported
// in old IE, and doesn't work when in the <head>.
head = document.getElementsByTagName( 'head' )[0] || document.body;
script = document.createElement( 'script' );
script.async = true;
script.src = src;
if ( $.isFunction( callback ) ) {
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;
// Remove the script
if ( script.parentNode ) {
script.parentNode.removeChild( script );
}
// Dereference the script
script = undefined;
callback();
}
};
}
if ( window.opera ) {
// Appending to the <head> blocks rendering completely in Opera,
// so append to the <body> after document ready. This means the
// scripts only start loading after the document has been rendered,
// but so be it. Opera users don't deserve faster web pages if their
// browser makes it impossible.
$( function () {
document.body.appendChild( script );
} );
} else {
head.appendChild( script );
}
} else {
document.write( mw.html.element( 'script', { 'src': src }, '' ) );
if ( $.isFunction( callback ) ) {
// Document.write is synchronous, so this is called when it's done
// FIXME: that's a lie. doc.write isn't actually synchronous
callback();
}
}
}
/**
* Executes a loaded module, making it ready to use
*
* @private
* @param {string} module Module name to execute
*/
function execute( module ) {
var key, value, media, i, urls, cssHandle, checkCssHandles,
cssHandlesRegistered = false;
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 executed: ' + module );
}
/**
* Define loop-function here for efficiency
* and to avoid re-using badly scoped variables.
* @ignore
*/
function addLink( media, url ) {
var el = document.createElement( 'link' );
getMarker().before( el ); // IE: Insert in dom before setting href
el.rel = 'stylesheet';
if ( media && media !== 'all' ) {
el.media = media;
}
el.href = url;
}
function runScript() {
var script, markModuleReady, nestedAddScript;
try {
script = registry[module].script;
markModuleReady = function () {
registry[module].state = 'ready';
handlePending( module );
};
nestedAddScript = function ( arr, callback, async, 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, async, i + 1 );
}, async );
};
if ( $.isArray( script ) ) {
nestedAddScript( script, markModuleReady, registry[module].async, 0 );
} else if ( $.isFunction( script ) ) {
registry[module].state = 'ready';
script( $ );
handlePending( module );
}
} 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
log( 'Exception thrown by ' + module + ': ' + e.message, e );
registry[module].state = 'error';
handlePending( module );
}
}
// This used to be inside runScript, but since that is now fired asychronously
// (after CSS is loaded) we need to set it here right away. It is crucial that
// when execute() is called this is set synchronously, otherwise modules will get
// executed multiple times as the registry will state that it isn't loading yet.
registry[module].state = 'loading';
// Add localizations to message system
if ( $.isPlainObject( registry[module].messages ) ) {
mw.messages.set( registry[module].messages );
}
// Make sure we don't run the scripts until all (potentially asynchronous)
// stylesheet insertions have completed.
( function () {
var pending = 0;
checkCssHandles = function () {
// cssHandlesRegistered ensures we don't take off too soon, e.g. when
// one of the cssHandles is fired while we're still creating more handles.
if ( cssHandlesRegistered && pending === 0 && runScript ) {
runScript();
runScript = undefined; // Revoke
}
};
cssHandle = function () {
var check = checkCssHandles;
pending++;
return function () {
if (check) {
pending--;
check();
check = undefined; // Revoke
}
};
};
}() );
// Process styles (see also mw.loader.implement)
// * back-compat: { <media>: css }
// * back-compat: { <media>: [url, ..] }
// * { "css": [css, ..] }
// * { "url": { <media>: [url, ..] } }
if ( $.isPlainObject( registry[module].style ) ) {
for ( key in registry[module].style ) {
value = registry[module].style[key];
media = undefined;
if ( key !== 'url' && key !== 'css' ) {
// Backwards compatibility, key is a media-type
if ( typeof value === 'string' ) {
// back-compat: { <media>: css }
// Ignore 'media' because it isn't supported (nor was it used).
// Strings are pre-wrapped in "@media". The media-type was just ""
// (because it had to be set to something).
// This is one of the reasons why this format is no longer used.
addEmbeddedCSS( value, cssHandle() );
} else {
// back-compat: { <media>: [url, ..] }
media = key;
key = 'bc-url';
}
}
// Array of css strings in key 'css',
// or back-compat array of urls from media-type
if ( $.isArray( value ) ) {
for ( i = 0; i < value.length; i += 1 ) {
if ( key === 'bc-url' ) {
// back-compat: { <media>: [url, ..] }
addLink( media, value[i] );
} else if ( key === 'css' ) {
// { "css": [css, ..] }
addEmbeddedCSS( value[i], cssHandle() );
}
}
// Not an array, but a regular object
// Array of urls inside media-type key
} else if ( typeof value === 'object' ) {
// { "url": { <media>: [url, ..] } }
for ( media in value ) {
urls = value[media];
for ( i = 0; i < urls.length; i += 1 ) {
addLink( media, urls[i] );
}
}
}
}
}
// Kick off.
cssHandlesRegistered = true;
checkCssHandles();
}
/**
* Adds a dependencies to the queue with optional callbacks to be run
* when the dependencies are ready or fail
*
* @private
* @param {string|string[]} dependencies Module name or array of string module names
* @param {Function} [ready] Callback to execute when all dependencies are ready
* @param {Function} [error] Callback to execute when any dependency fails
* @param {boolean} [async] If true, load modules asynchronously even if
* document ready has not yet occurred.
*/
function request( dependencies, ready, error, async ) {
var n;
// Allow calling by single module name
if ( typeof dependencies === 'string' ) {
dependencies = [dependencies];
}
// Add ready and error callbacks if they were given
if ( ready !== undefined || error !== undefined ) {
jobs[jobs.length] = {
'dependencies': filter(
['registered', 'loading', 'loaded'],
dependencies
),
'ready': ready,
'error': error
};
}
// Queue up any dependencies that are registered
dependencies = filter( ['registered'], dependencies );
for ( n = 0; n < dependencies.length; n += 1 ) {
if ( $.inArray( dependencies[n], queue ) === -1 ) {
queue[queue.length] = dependencies[n];
if ( async ) {
// Mark this module as async in the registry
registry[dependencies[n]].async = true;
}
}
}
// Work the queue
mw.loader.work();
}
function sortQuery(o) {
var sorted = {}, key, a = [];
for ( key in o ) {
if ( hasOwn.call( o, key ) ) {
a.push( key );
}
}
a.sort();
for ( key = 0; key < a.length; key += 1 ) {
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
* @private
*/
function buildModulesString( moduleMap ) {
var arr = [], p, prefix;
for ( prefix in moduleMap ) {
p = prefix === '' ? '' : prefix + '.';
arr.push( p + moduleMap[prefix].join( ',' ) );
}
return arr.join( '|' );
}
/**
* Asynchronously append a script tag to the end of the body
* that invokes load.php
* @private
* @param {Object} moduleMap Module map, see #buildModulesString
* @param {Object} currReqBase Object with other parameters (other than 'modules') to use in the request
* @param {string} sourceLoadScript URL of load.php
* @param {boolean} async If true, use an asynchrounous request even if document ready has not yet occurred
*/
function doRequest( moduleMap, currReqBase, sourceLoadScript, async ) {
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 ) + '&*', null, async );
}
/* Public Methods */
return {
addStyleTag: addStyleTag,
/**
* Requests dependencies from server, loading and executing when things when ready.
*/
work: function () {
var reqBase, splits, maxQueryLength, q, b, bSource, bGroup, bSourceGroup,
source, group, g, i, modules, maxVersion, sourceLoadScript,
currReqBase, currReqBaseLength, moduleMap, l,
lastDotIndex, prefix, suffix, bytesAdded, async;
// Build a list of request parameters common to all requests.
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 ( q = 0; q < queue.length; q += 1 ) {
// Only request modules which are registered
if ( registry[queue[q]] !== undefined && registry[queue[q]].state === 'registered' ) {
// Prevent duplicate entries
if ( $.inArray( queue[q], batch ) === -1 ) {
batch[batch.length] = queue[q];
// Mark registered modules as loading
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 ( b = 0; b < batch.length; b += 1 ) {
bSource = registry[batch[b]].source;
bGroup = registry[batch[b]].group;
if ( splits[bSource] === undefined ) {
splits[bSource] = {};
}
if ( splits[bSource][bGroup] === undefined ) {
splits[bSource][bGroup] = [];
}
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 = [];
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 ( g = 0; g < modules.length; g += 1 ) {
if ( registry[modules[g]].version > maxVersion ) {
maxVersion = registry[modules[g]].version;
}
}
currReqBase = $.extend( { version: formatVersionNumber( maxVersion ) }, reqBase );
// For user modules append a user name to the request.
if ( group === 'user' && mw.config.get( 'wgUserName' ) !== null ) {
currReqBase.user = mw.config.get( 'wgUserName' );
}
currReqBaseLength = $.param( currReqBase ).length;
async = true;
// We may need to split up the request to honor the query string length limit,
// so build it piece by piece.
l = currReqBaseLength + 9; // '&modules='.length == 9
moduleMap = {}; // { prefix: [ suffixes ] }
for ( i = 0; i < modules.length; i += 1 ) {
// Determine how many bytes this module would add to the query string
lastDotIndex = modules[i].lastIndexOf( '.' );
// Note that these substr() calls work even if lastDotIndex == -1
prefix = modules[i].substr( 0, lastDotIndex );
suffix = modules[i].substr( lastDotIndex + 1 );
bytesAdded = moduleMap[prefix] !== undefined
? suffix.length + 3 // '%2C'.length == 3
: modules[i].length + 3; // '%7C'.length == 3
// If the request would become too long, create a new one,
// but don't create empty requests
if ( maxQueryLength > 0 && !$.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, async );
moduleMap = {};
async = true;
l = currReqBaseLength + 9;
}
if ( moduleMap[prefix] === undefined ) {
moduleMap[prefix] = [];
}
moduleMap[prefix].push( suffix );
if ( !registry[modules[i]].async ) {
// If this module is blocking, make the entire request blocking
// This is slightly suboptimal, but in practice mixing of blocking
// and async modules will only occur in debug mode.
async = false;
}
l += bytesAdded;
}
// If there's anything left in moduleMap, request that too
if ( !$.isEmptyObject( moduleMap ) ) {
doRequest( moduleMap, currReqBase, sourceLoadScript, async );
}
}
}
},
/**
* Register a source.
*
* @param {string} id Short lowercase a-Z string representing a source, only used internally.
* @param {Object} props Object containing only the loadScript property which is a url to
* the load.php location of the source.
* @return {boolean}
*/
addSource: function ( id, props ) {
var source;
// Allow multiple additions
if ( typeof id === 'object' ) {
for ( 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.
*/
register: function ( module, version, dependencies, group, source ) {
var m;
// Allow multiple registration
if ( typeof module === 'object' ) {
for ( m = 0; m < module.length; m += 1 ) {
// 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 registered: ' + 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' || $.isFunction( dependencies ) ) {
// Allow dependencies to be given as an array of module names
// or a function which returns an array
registry[module].dependencies = dependencies;
}
},
/**
* Implements a module, giving the system a course of action to take
* upon loading. Results of a request for one or more modules contain
* calls to this function.
*
* All arguments are required.
*
* @param {string} module Name of module
* @param {Function|Array} script Function with module code or Array of URLs to
* be used as the src attribute of a new `<script>` tag.
* @param {Object} style Should follow one of the following patterns:
* { "css": [css, ..] }
* { "url": { <media>: [url, ..] } }
* And for backwards compatibility (needs to be supported forever due to caching):
* { <media>: css }
* { <media>: [url, ..] }
*
* The reason css strings are not concatenated anymore is bug 31676. We now check
* whether it's safe to extend the stylesheet (see #canExpandStylesheetWith).
*
* @param {Object} msgs List of key/value pairs to be added to {@link mw#messages}.
*/
implement: function ( module, script, style, msgs ) {
// Validate input
if ( typeof module !== 'string' ) {
throw new Error( 'module must be a string, not a ' + typeof module );
}
if ( !$.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 );
}
// Attach components
registry[module].script = script;
registry[module].style = style;
registry[module].messages = msgs;
// The module may already have been marked as erroneous
if ( $.inArray( registry[module].state, ['error', 'missing'] ) === -1 ) {
registry[module].state = 'loaded';
if ( allReady( registry[module].dependencies ) ) {
execute( module );
}
}
},
/**
* Executes a function as soon as one or more required modules are ready
*
* @param dependencies {String|Array} Module name or array of modules names the callback
* dependends on 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)
*/
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 ( allReady( dependencies ) ) {
// Run ready immediately
if ( $.isFunction( ready ) ) {
ready();
}
} else if ( filter( ['error', 'missing'], dependencies ).length ) {
// Execute error immediately if any dependencies have errors
if ( $.isFunction( error ) ) {
error( new Error( 'one or more dependencies have state "error" or "missing"' ),
dependencies );
}
} else {
// Not all dependencies are ready: queue up a request
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.
* @param async {Boolean} (optional) If true, load modules asynchronously
* even if document ready has not yet occurred. If false (default),
* block before document ready and load async after. If not set, true will
* be assumed if loading a URL, and false will be assumed otherwise.
*/
load: function ( modules, type, async ) {
var filtered, m, module, l;
// 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 url or single dependency as a string
if ( typeof modules === 'string' ) {
// Support adding arbitrary external scripts
if ( /^(https?:)?\/\//.test( modules ) ) {
if ( async === undefined ) {
// Assume async for bug 34542
async = true;
}
if ( type === 'text/css' ) {
// IE7-8 throws security warnings when inserting a <link> tag
// with a protocol-relative URL set though attributes (instead of
// properties) - when on HTTPS. See also bug #.
l = document.createElement( 'link' );
l.rel = 'stylesheet';
l.href = modules;
$( 'head' ).append( l );
return;
}
if ( type === 'text/javascript' || type === undefined ) {
addScript( modules, null, async );
return;
}
// Unknown type
throw new Error( 'invalid type for external url, must be text/css or text/javascript. not ' + type );
}
// Called with single module
modules = [ modules ];
}
// Filter out undefined modules, otherwise resolve() will throw
// an exception for trying to load an undefined module.
// Undefined modules are acceptable here in load(), because load() takes
// an array of unrelated modules, whereas the modules passed to
// using() are related and must all be loaded.
for ( filtered = [], m = 0; m < modules.length; m += 1 ) {
module = registry[modules[m]];
if ( module !== undefined ) {
if ( $.inArray( module.state, ['error', 'missing'] ) === -1 ) {
filtered[filtered.length] = modules[m];
}
}
}
if ( filtered.length === 0 ) {
return;
}
// Resolve entire dependency map
filtered = resolve( filtered );
// If all modules are ready, nothing to be done
if ( allReady( filtered ) ) {
return;
}
// If any modules have errors: also quit.
if ( filter( ['error', 'missing'], filtered ).length ) {
return;
}
// Since some modules are not yet ready, queue up a request.
request( filtered, undefined, undefined, async );
},
/**
* Changes the state of a module
*
* @param module {String|Object} module name or object of module name/state pairs
* @param state {String} state name
*/
state: function ( module, state ) {
var m;
if ( typeof module === 'object' ) {
for ( m in module ) {
mw.loader.state( m, module[m] );
}
return;
}
if ( registry[module] === undefined ) {
mw.loader.register( module );
}
if ( $.inArray( state, ['ready', 'error', 'missing'] ) !== -1
&& registry[module].state !== state ) {
// Make sure pending modules depending on this one get executed if their
// dependencies are now fulfilled!
registry[module].state = state;
handlePending( module );
} else {
registry[module].state = state;
}
},
/**
* Gets the version of a module
*
* @param module string name of module to get version for
*/
getVersion: function ( module ) {
if ( registry[module] !== undefined && registry[module].version !== undefined ) {
return formatVersionNumber( registry[module].version );
}
return null;
},
/**
* @deprecated since 1.18 use mw.loader.getVersion() instead
*/
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
*/
getState: function ( module ) {
if ( registry[module] !== undefined && registry[module].state !== undefined ) {
return registry[module].state;
}
return null;
},
/**
* Get names of all registered modules.
*
* @return {Array}
*/
getModuleNames: function () {
return $.map( registry, function ( i, key ) {
return key;
} );
},
/**
* For backwards-compatibility with Squid-cached pages. Loads mw.user
*/
go: function () {
mw.loader.load( 'mediawiki.user' );
}
};
}() ),
/**
* HTML construction helper functions
* @class mw.html
* @singleton
*/
html: ( function () {
function escapeCallback( s ) {
switch ( s ) {
case '\'':
return ''';
case '"':
return '"';
case '<':
return '<';
case '>':
return '>';
case '&':
return '&';
}
}
return {
/**
* Escape a string for HTML. Converts special characters to HTML entities.
* @param {string} s The string to escape
*/
escape: function ( s ) {
return s.replace( /['"<>&]/g, escapeCallback );
},
/**
* Wrapper object for raw HTML passed to mw.html.element().
* @class mw.html.Raw
*/
Raw: function ( value ) {
this.value = value;
},
/**
* Wrapper object for CDATA element contents passed to mw.html.element()
* @class mw.html.Cdata
*/
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="<"/></div>
*/
element: function ( name, attrs, contents ) {
var v, attrName, s = '<' + name;
for ( 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( String( 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 += String( 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;
}
};
}() ),
// Skeleton user object. mediawiki.user.js extends this
user: {
options: new Map(),
tokens: new Map()
}
};
}( jQuery ) );
// Alias $j to jQuery for backwards compatibility
window.$j = jQuery;
// Attach to window and globally alias
window.mw = window.mediaWiki = mw;
// Auto-register from pre-loaded startup scripts
if ( jQuery.isFunction( window.startUp ) ) {
window.startUp();
window.startUp = undefined;
}