Current File : //www/varak.net/wiki.varak.net/resources/src/mediawiki/mediawiki.js
/**
* Base library for MediaWiki.
*
* Exposed globally as `mediaWiki` with `mw` as shortcut.
*
* @class mw
* @alternateClassName mediaWiki
* @singleton
*/
/*jshint latedef:false */
( function ( $ ) {
'use strict';
var mw,
hasOwn = Object.prototype.hasOwnProperty,
slice = Array.prototype.slice,
trackCallbacks = $.Callbacks( 'memory' ),
trackHandlers = [],
trackQueue = [];
/**
* FNV132 hash function
*
* This function implements the 32-bit version of FNV-1.
* It is equivalent to hash( 'fnv132', ... ) in PHP, except
* its output is base 36 rather than hex.
* See <https://en.wikipedia.org/wiki/FNV_hash_function>
*
* @private
* @param {string} str String to hash
* @return {string} hash as an seven-character base 36 string
*/
function fnv132( str ) {
/*jshint bitwise:false */
var hash = 0x811C9DC5,
i;
for ( i = 0; i < str.length; i++ ) {
hash += ( hash << 1 ) + ( hash << 4 ) + ( hash << 7 ) + ( hash << 8 ) + ( hash << 24 );
hash ^= str.charCodeAt( i );
}
hash = ( hash >>> 0 ).toString( 36 );
while ( hash.length < 7 ) {
hash = '0' + hash;
}
return hash;
}
/**
* Create an object that can be read from or written to from methods that allow
* interaction both with single and multiple properties at once.
*
* @example
*
* var collection, query, results;
*
* // Create your address book
* collection = new mw.Map();
*
* // This data could be coming from an external source (eg. API/AJAX)
* collection.set( {
* 'John Doe': 'john@example.org',
* 'Jane Doe': 'jane@example.org',
* 'George van Halen': 'gvanhalen@example.org'
* } );
*
* wanted = ['John Doe', 'Jane Doe', 'Daniel Jackson'];
*
* // You can detect missing keys first
* if ( !collection.exists( wanted ) ) {
* // One or more are missing (in this case: "Daniel Jackson")
* mw.log( 'One or more names were not found in your address book' );
* }
*
* // Or just let it give you what it can. Optionally fill in from a default.
* results = collection.get( wanted, 'nobody@example.com' );
* mw.log( results['Jane Doe'] ); // "jane@example.org"
* mw.log( results['Daniel Jackson'] ); // "nobody@example.com"
*
* @class mw.Map
*
* @constructor
* @param {Object|boolean} [values] The value-baring object to be mapped. Defaults to an
* empty object.
* For backwards-compatibility with mw.config, this can also be `true` in which case values
* are copied to the Window object as global variables (T72470). Values are copied in
* one direction only. Changes to globals are not reflected in the map.
*/
function Map( values ) {
if ( values === true ) {
this.values = {};
// Override #set to also set the global variable
this.set = function ( selection, value ) {
var s;
if ( $.isPlainObject( selection ) ) {
for ( s in selection ) {
setGlobalMapValue( this, s, selection[ s ] );
}
return true;
}
if ( typeof selection === 'string' && arguments.length ) {
setGlobalMapValue( this, selection, value );
return true;
}
return false;
};
return;
}
this.values = values || {};
}
/**
* Alias property to the global object.
*
* @private
* @static
* @param {mw.Map} map
* @param {string} key
* @param {Mixed} value
*/
function setGlobalMapValue( map, key, value ) {
map.values[ key ] = value;
mw.log.deprecate(
window,
key,
value,
// Deprecation notice for mw.config globals (T58550, T72470)
map === mw.config && 'Use mw.config instead.'
);
}
Map.prototype = {
/**
* Get the value of one or more keys.
*
* If called with no arguments, all values are returned.
*
* @param {string|Array} [selection] Key or array of keys to retrieve values for.
* @param {Mixed} [fallback=null] Value for keys that don't exist.
* @return {Mixed|Object| null} If selection was a string, returns the value,
* If selection was an array, returns an object of key/values.
* If no selection is passed, the 'values' container is returned. (Beware that,
* as is the default in JavaScript, the object is returned by reference.)
*/
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;
},
/**
* Set one or more key/value pairs.
*
* @param {string|Object} selection Key to set value for, or object mapping keys to values
* @param {Mixed} [value] Value to set (optional, only in use when key is a string)
* @return {boolean} 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;
},
/**
* Check if one or more keys exist.
*
* @param {Mixed} selection Key or array of keys to check
* @return {boolean} True if the key(s) exist
*/
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.
*
* Format defaults to 'text'.
*
* @example
*
* var obj, str;
* mw.messages.set( {
* 'hello': 'Hello world',
* 'hello-user': 'Hello, $1!',
* 'welcome-user': 'Welcome back to $2, $1! Last visit by $1: $3'
* } );
*
* obj = new mw.Message( mw.messages, 'hello' );
* mw.log( obj.text() );
* // Hello world
*
* obj = new mw.Message( mw.messages, 'hello-user', [ 'John Doe' ] );
* mw.log( obj.text() );
* // Hello, John Doe!
*
* obj = new mw.Message( mw.messages, 'welcome-user', [ 'John Doe', 'Wikipedia', '2 hours ago' ] );
* mw.log( obj.text() );
* // Welcome back to Wikipedia, John Doe! Last visit by John Doe: 2 hours ago
*
* // Using mw.message shortcut
* obj = mw.message( 'hello-user', 'John Doe' );
* mw.log( obj.text() );
* // Hello, John Doe!
*
* // Using mw.msg shortcut
* str = mw.msg( 'hello-user', 'John Doe' );
* mw.log( str );
* // Hello, John Doe!
*
* // Different formats
* obj = new mw.Message( mw.messages, 'hello-user', [ 'John "Wiki" <3 Doe' ] );
*
* obj.format = 'text';
* str = obj.toString();
* // Same as:
* str = obj.text();
*
* mw.log( str );
* // Hello, John "Wiki" <3 Doe!
*
* mw.log( obj.escaped() );
* // Hello, John "Wiki" <3 Doe!
*
* @class mw.Message
*
* @constructor
* @param {mw.Map} map Message store
* @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 = {
/**
* Get parsed contents of the message.
*
* The default parser does simple $N replacements and nothing else.
* This may be overridden to provide a more complex message parser.
* The primary override is in the mediawiki.jqueryMsg module.
*
* This function will not be called for nonexistent messages.
*
* @return {string} Parsed message
*/
parser: function () {
return mw.format.apply( null, [ this.map.get( this.key ) ].concat( this.parameters ) );
},
/**
* Add (does not replace) parameters for `$N` placeholder values.
*
* @param {Array} parameters
* @chainable
*/
params: function ( parameters ) {
var i;
for ( i = 0; i < parameters.length; i++ ) {
this.parameters.push( parameters[ i ] );
}
return this;
},
/**
* Convert message object to its string form based on current 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;
},
/**
* Change format to 'parse' and convert 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();
},
/**
* Change format to 'plain' and convert 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();
},
/**
* Change format to 'text' and convert message to string
*
* If jqueryMsg is loaded, {{-transformation is done where supported
* (such as {{plural:}}, {{gender:}}, {{int:}}).
*
* Otherwise, it is equivalent to plain
*
* @return {string} String form of text message
*/
text: function () {
this.format = 'text';
return this.toString();
},
/**
* Change the format to 'escaped' and convert message to string
*
* This is equivalent to using the 'text' format (see #text), then
* HTML-escaping the output.
*
* @return {string} String form of html escaped message
*/
escaped: function () {
this.format = 'escaped';
return this.toString();
},
/**
* Check if a message exists
*
* @see mw.Map#exists
* @return {boolean}
*/
exists: function () {
return this.map.exists( this.key );
}
};
/**
* @class mw
*/
mw = {
/**
* Get the current time, measured in milliseconds since January 1, 1970 (UTC).
*
* On browsers that implement the Navigation Timing API, this function will produce floating-point
* values with microsecond precision that are guaranteed to be monotonic. On all other browsers,
* it will fall back to using `Date`.
*
* @return {number} Current time
*/
now: ( function () {
var perf = window.performance,
navStart = perf && perf.timing && perf.timing.navigationStart;
return navStart && typeof perf.now === 'function' ?
function () { return navStart + perf.now(); } :
function () { return +new Date(); };
}() ),
/**
* Format a string. Replace $1, $2 ... $N with positional arguments.
*
* Used by Message#parser().
*
* @since 1.25
* @param {string} formatString Format string
* @param {...Mixed} parameters Values for $N replacements
* @return {string} Formatted string
*/
format: function ( formatString ) {
var parameters = slice.call( arguments, 1 );
return formatString.replace( /\$(\d+)/g, function ( str, match ) {
var index = parseInt( match, 10 ) - 1;
return parameters[ index ] !== undefined ? parameters[ index ] : '$' + match;
} );
},
/**
* Track an analytic event.
*
* This method provides a generic means for MediaWiki JavaScript code to capture state
* information for analysis. Each logged event specifies a string topic name that describes
* the kind of event that it is. Topic names consist of dot-separated path components,
* arranged from most general to most specific. Each path component should have a clear and
* well-defined purpose.
*
* Data handlers are registered via `mw.trackSubscribe`, and receive the full set of
* events that match their subcription, including those that fired before the handler was
* bound.
*
* @param {string} topic Topic name
* @param {Object} [data] Data describing the event, encoded as an object
*/
track: function ( topic, data ) {
trackQueue.push( { topic: topic, timeStamp: mw.now(), data: data } );
trackCallbacks.fire( trackQueue );
},
/**
* Register a handler for subset of analytic events, specified by topic.
*
* Handlers will be called once for each tracked event, including any events that fired before the
* handler was registered; 'this' is set to a plain object with a 'timeStamp' property indicating
* the exact time at which the event fired, a string 'topic' property naming the event, and a
* 'data' property which is an object of event-specific data. The event topic and event data are
* also passed to the callback as the first and second arguments, respectively.
*
* @param {string} topic Handle events whose name starts with this string prefix
* @param {Function} callback Handler to call for each matching tracked event
* @param {string} callback.topic
* @param {Object} [callback.data]
*/
trackSubscribe: function ( topic, callback ) {
var seen = 0;
function handler( trackQueue ) {
var event;
for ( ; seen < trackQueue.length; seen++ ) {
event = trackQueue[ seen ];
if ( event.topic.indexOf( topic ) === 0 ) {
callback.call( event, event.topic, event.data );
}
}
}
trackHandlers.push( [ handler, callback ] );
trackCallbacks.add( handler );
},
/**
* Stop handling events for a particular handler
*
* @param {Function} callback
*/
trackUnsubscribe: function ( callback ) {
trackHandlers = $.grep( trackHandlers, function ( fns ) {
if ( fns[ 1 ] === callback ) {
trackCallbacks.remove( fns[ 0 ] );
// Ensure the tuple is removed to avoid holding on to closures
return false;
}
return true;
} );
},
// Expose Map constructor
Map: Map,
// Expose Message constructor
Message: Message,
/**
* Map of configuration values.
*
* Check out [the complete list of configuration values](https://www.mediawiki.org/wiki/Manual:Interface/JavaScript#mw.config)
* on mediawiki.org.
*
* If `$wgLegacyJavaScriptGlobals` is true, this Map will add its values to the
* global `window` object.
*
* @property {mw.Map} config
*/
// Dummy placeholder later assigned in ResourceLoaderStartUpModule
config: null,
/**
* Empty object for third-party libraries, for cases where you don't
* want to add a new global, or the global is bad and needs containment
* or wrapping.
*
* @property
*/
libs: {},
/**
* Access container for deprecated functionality that can be moved from
* from their legacy location and attached to this object (e.g. a global
* function that is deprecated and as stop-gap can be exposed through here).
*
* This was reserved for future use but never ended up being used.
*
* @deprecated since 1.22 Let deprecated identifiers keep their original name
* and use mw.log#deprecate to create an access container for tracking.
* @property
*/
legacy: {},
/**
* Store for messages.
*
* @property {mw.Map}
*/
messages: new Map(),
/**
* Store for templates associated with a module.
*
* @property {mw.Map}
*/
templates: new Map(),
/**
* Get a message object.
*
* Shortcut for `new mw.Message( mw.messages, key, parameters )`.
*
* @see mw.Message
* @param {string} key Key of message to get
* @param {...Mixed} parameters Values for $N replacements
* @return {mw.Message}
*/
message: function ( key ) {
var parameters = slice.call( arguments, 1 );
return new Message( mw.messages, key, parameters );
},
/**
* Get a message string using the (default) 'text' format.
*
* Shortcut for `mw.message( key, parameters... ).text()`.
*
* @see mw.Message
* @param {string} key Key of message to get
* @param {...Mixed} parameters Values for $N replacements
* @return {string}
*/
msg: function () {
return mw.message.apply( mw.message, arguments ).toString();
},
/**
* Dummy placeholder for {@link mw.log}
*
* @method
*/
log: ( function () {
// Also update the restoration of methods in mediawiki.log.js
// when adding or removing methods here.
var log = function () {},
console = window.console;
/**
* @class mw.log
* @singleton
*/
/**
* Write a message to the console's warning channel.
* Actions not supported by the browser console are silently ignored.
*
* @param {...string} msg Messages to output to console
*/
log.warn = console && console.warn && Function.prototype.bind ?
Function.prototype.bind.call( console.warn, console ) :
$.noop;
/**
* Write a message to the console's error channel.
*
* Most browsers provide a stacktrace by default if the argument
* is a caught Error object.
*
* @since 1.26
* @param {Error|...string} msg Messages to output to console
*/
log.error = console && console.error && Function.prototype.bind ?
Function.prototype.bind.call( console.error, console ) :
$.noop;
/**
* Create a property in a host object that, when accessed, will produce
* a deprecation warning in the console with backtrace.
*
* @param {Object} obj Host object of deprecated property
* @param {string} key Name of property to create in `obj`
* @param {Mixed} val The value this property should return when accessed
* @param {string} [msg] Optional text to include in the deprecation message
*/
log.deprecate = !Object.defineProperty ? function ( obj, key, val ) {
obj[ key ] = val;
} : function ( obj, key, val, msg ) {
/*globals Set */
msg = 'Use of "' + key + '" is deprecated.' + ( msg ? ( ' ' + msg ) : '' );
var logged, loggedIsSet, uniqueTrace;
if ( window.Set ) {
logged = new Set();
loggedIsSet = true;
} else {
logged = {};
loggedIsSet = false;
}
uniqueTrace = function () {
var trace = new Error().stack;
if ( loggedIsSet ) {
if ( logged.has( trace ) ) {
return false;
}
logged.add( trace );
return true;
} else {
if ( logged.hasOwnProperty( trace ) ) {
return false;
}
logged[ trace ] = 1;
return true;
}
};
Object.defineProperty( obj, key, {
configurable: true,
enumerable: true,
get: function () {
if ( uniqueTrace() ) {
mw.track( 'mw.deprecate', key );
mw.log.warn( msg );
}
return val;
},
set: function ( newVal ) {
if ( uniqueTrace() ) {
mw.track( 'mw.deprecate', key );
mw.log.warn( msg );
}
val = newVal;
}
} );
};
return log;
}() ),
/**
* Client for ResourceLoader server end point.
*
* This client is in charge of maintaining the module registry and state
* machine, initiating network (batch) requests for loading modules, as
* well as dependency resolution and execution of source code.
*
* For more information, refer to
* <https://www.mediawiki.org/wiki/ResourceLoader/Features>
*
* @class mw.loader
* @singleton
*/
loader: ( function () {
/**
* Fired via mw.track on various resource loading errors.
*
* @event resourceloader_exception
* @param {Error|Mixed} e The error that was thrown. Almost always an Error
* object, but in theory module code could manually throw something else, and that
* might also end up here.
* @param {string} [module] Name of the module which caused the error. Omitted if the
* error is not module-related or the module cannot be easily identified due to
* batched handling.
* @param {string} source Source of the error. Possible values:
*
* - style: stylesheet error (only affects old IE where a special style loading method
* is used)
* - load-callback: exception thrown by user callback
* - module-execute: exception thrown by module code
* - store-eval: could not evaluate module code cached in localStorage
* - store-localstorage-init: localStorage or JSON parse error in mw.loader.store.init
* - store-localstorage-json: JSON conversion error in mw.loader.store.set
* - store-localstorage-update: localStorage or JSON conversion error in mw.loader.store.update
*/
/**
* Fired via mw.track on resource loading error conditions.
*
* @event resourceloader_assert
* @param {string} source Source of the error. Possible values:
*
* - bug-T59567: failed to cache script due to an Opera function -> string conversion
* bug; see <https://phabricator.wikimedia.org/T59567> for details
*/
/**
* Mapping of registered modules.
*
* See #implement and #execute for exact details on support for script, style and messages.
*
* Format:
*
* {
* 'moduleName': {
* // From mw.loader.register()
* 'version': '########' (hash)
* 'dependencies': ['required.foo', 'bar.also', ...], (or) function () {}
* 'group': 'somegroup', (or) null
* 'source': 'local', (or) 'anotherwiki'
* 'skip': 'return !!window.Example', (or) null
* 'module': export Object
*
* // Set from execute() or mw.loader.state()
* 'state': 'registered', 'loaded', 'loading', 'ready', 'error', or 'missing'
*
* // Optionally added at run-time by mw.loader.implement()
* 'skipped': true
* 'script': closure, array of urls, or string
* 'style': { ... } (see #execute)
* 'messages': { 'key': 'value', ... }
* }
* }
*
* State machine:
*
* - `registered`:
* The module is known to the system but not yet required.
* Meta data is registered via mw.loader#register. Calls to that method are
* generated server-side by the startup module.
* - `loading`:
* The module was required through mw.loader (either directly or as dependency of
* another module). The client will fetch module contents from the server.
* The contents are then stashed in the registry via mw.loader#implement.
* - `loaded`:
* The module has been loaded from the server and stashed via mw.loader#implement.
* If the module has no more dependencies in-flight, the module will be executed
* immediately. Otherwise execution is deferred, controlled via #handlePending.
* - `executing`:
* The module is being executed.
* - `ready`:
* The module has been successfully executed.
* - `error`:
* The module (or one of its dependencies) produced an error during execution.
* - `missing`:
* The module was registered client-side and requested, but the server denied knowledge
* of the module's existence.
*
* @property
* @private
*/
var registry = {},
// Mapping of sources, keyed by source-id, values are strings.
//
// Format:
//
// {
// 'sourceId': 'http://example.org/w/load.php'
// }
//
sources = {},
// For queueModuleScript()
handlingPendingRequests = false,
pendingRequests = [],
// List of modules to be loaded
queue = [],
/**
* List of callback jobs waiting for modules to be ready.
*
* Jobs are created by #enqueue() and run by #handlePending().
*
* Typically when a job is created for a module, the job's dependencies contain
* both the required module and all its recursive dependencies.
*
* Format:
*
* {
* 'dependencies': [ module names ],
* 'ready': Function callback
* 'error': Function callback
* }
*
* @property {Object[]} jobs
* @private
*/
jobs = [],
// For getMarker()
marker = null,
// For addEmbeddedCSS()
cssBuffer = '',
cssBufferTimer = null,
cssCallbacks = $.Callbacks(),
isIE9 = document.documentMode === 9,
rAF = window.requestAnimationFrame || setTimeout;
function getMarker() {
if ( !marker ) {
// Cache
marker = document.querySelector( 'meta[name="ResourceLoaderDynamicStyles"]' );
if ( !marker ) {
mw.log( 'Create <meta name="ResourceLoaderDynamicStyles"> dynamically' );
marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' )[ 0 ];
}
}
return marker;
}
/**
* Create a new style element and add it to the DOM.
*
* @private
* @param {string} text CSS text
* @param {Node} [nextNode] The element where the style tag
* should be inserted before
* @return {HTMLElement} Reference to the created style element
*/
function newStyleTag( text, nextNode ) {
var s = document.createElement( 'style' );
s.appendChild( document.createTextNode( text ) );
if ( nextNode && nextNode.parentNode ) {
nextNode.parentNode.insertBefore( s, nextNode );
} else {
document.getElementsByTagName( 'head' )[ 0 ].appendChild( s );
}
return s;
}
/**
* Add a bit of CSS text to the current browser page.
*
* The CSS will be appended to an existing ResourceLoader-created `<style>` tag
* or create a new one based on whether the given `cssText` is safe for extension.
*
* @private
* @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;
function fireCallbacks() {
var oldCallbacks = cssCallbacks;
// Reset cssCallbacks variable so it's not polluted by any calls to
// addEmbeddedCSS() from one of the callbacks (T105973)
cssCallbacks = $.Callbacks();
oldCallbacks.fire().empty();
}
if ( callback ) {
cssCallbacks.add( callback );
}
// Yield once before creating the <style> tag. This lets multiple stylesheets
// accumulate into one buffer, allowing us to reduce how often new stylesheets
// are inserted in the browser. Appending a stylesheet and waiting for the
// browser to repaint is fairly expensive. (T47810)
if ( cssText ) {
// Don't extend the buffer if the item needs its own stylesheet.
// Keywords like `@import` are only valid at the start of a stylesheet (T37562).
if ( !cssBuffer || cssText.slice( 0, '@import'.length ) !== '@import' ) {
// Linebreak for somewhat distinguishable sections
cssBuffer += '\n' + cssText;
if ( !cssBufferTimer ) {
cssBufferTimer = rAF( function () {
// Wrap in anonymous function that takes no arguments
// Support: Firefox < 13
// Firefox 12 has non-standard behaviour of passing a number
// as first argument to a setTimeout callback.
// http://benalman.com/news/2009/07/the-mysterious-firefox-settime/
addEmbeddedCSS();
} );
}
return;
}
// This is a scheduled flush for the buffer
} else {
cssBufferTimer = null;
cssText = cssBuffer;
cssBuffer = '';
}
// By default, always create a new <style>. Appending text to a <style> tag is
// is a performance anti-pattern as it requires CSS to be reparsed (T47810).
//
// Support: IE 6-9
// Try to re-use existing <style> tags due to the IE stylesheet limit (T33676).
if ( isIE9 ) {
$style = $( getMarker() ).prev();
// Verify that the element before the marker actually is a <style> tag created
// by mw.loader (not some other style tag, or e.g. a <meta> tag).
if ( $style.data( 'ResourceLoaderDynamicStyleTag' ) ) {
styleEl = $style[ 0 ];
styleEl.appendChild( document.createTextNode( cssText ) );
fireCallbacks();
return;
}
// Else: No existing tag to reuse. Continue below and create the first one.
}
$style = $( newStyleTag( cssText, getMarker() ) );
if ( isIE9 ) {
$style.data( 'ResourceLoaderDynamicStyleTag', true );
}
fireCallbacks();
}
/**
* @private
* @param {Array} modules List of module names
* @return {string} Hash of concatenated version hashes.
*/
function getCombinedVersion( modules ) {
var hashes = $.map( modules, function ( module ) {
return registry[ module ].version;
} );
return fnv132( hashes.join( '' ) );
}
/**
* Determine whether all dependencies are in state 'ready', which means we may
* execute the module or job now.
*
* @private
* @param {Array} modules Names of modules to be checked
* @return {boolean} True if all modules are in state 'ready', false otherwise
*/
function allReady( modules ) {
var i;
for ( i = 0; i < modules.length; i++ ) {
if ( mw.loader.getState( modules[ i ] ) !== 'ready' ) {
return false;
}
}
return true;
}
/**
* Determine whether all dependencies are in state 'ready', which means we may
* execute the module or job now.
*
* @private
* @param {Array} modules Names of modules to be checked
* @return {boolean} True if no modules are in state 'error' or 'missing', false otherwise
*/
function anyFailed( modules ) {
var i, state;
for ( i = 0; i < modules.length; i++ ) {
state = mw.loader.getState( modules[ i ] );
if ( state === 'error' || state === 'missing' ) {
return true;
}
}
return false;
}
/**
* 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, go ahead and execute
* all jobs/modules now having their dependencies satisfied.
*
* Jobs that depend on a failed module, will have their error callback ran (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;
if ( registry[ module ].state === 'error' || registry[ module ].state === 'missing' ) {
// 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 ( registry[ m ].state !== 'error' && registry[ m ].state !== 'missing' ) {
if ( anyFailed( registry[ m ].dependencies ) ) {
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++ ) {
hasErrors = anyFailed( jobs[ j ].dependencies );
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 ) {
if ( typeof job.error === 'function' ) {
job.error( new Error( 'Module ' + module + ' has failed dependencies' ), [ module ] );
}
} else {
if ( typeof job.ready === 'function' ) {
job.ready();
}
}
} catch ( e ) {
// A user-defined callback raised an exception.
// Swallow it to protect our state machine!
mw.track( 'resourceloader.exception', { exception: e, module: module, source: 'load-callback' } );
}
}
}
if ( registry[ module ].state === 'ready' ) {
// The current module became 'ready'. Set it in the module store, and recursively execute all
// dependent modules that are loaded and now have all dependencies satisfied.
mw.loader.store.set( module, registry[ module ] );
for ( m in registry ) {
if ( registry[ m ].state === 'loaded' && allReady( registry[ m ].dependencies ) ) {
execute( m );
}
}
}
}
/**
* Resolve dependencies and detect 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 i, deps, skip;
if ( !hasOwn.call( registry, module ) ) {
throw new Error( 'Unknown dependency: ' + module );
}
if ( registry[ module ].skip !== null ) {
/*jshint evil:true */
skip = new Function( registry[ module ].skip );
registry[ module ].skip = null;
if ( skip() ) {
registry[ module ].skipped = true;
registry[ module ].dependencies = [];
registry[ module ].state = 'ready';
handlePending( module );
return;
}
}
// Resolves dynamic loader function and replaces it with its own results
if ( typeof registry[ module ].dependencies === 'function' ) {
registry[ module ].dependencies = registry[ module ].dependencies();
// Ensures the module's dependencies are always in an array
if ( typeof registry[ module ].dependencies !== 'object' ) {
registry[ module ].dependencies = [ registry[ module ].dependencies ];
}
}
if ( $.inArray( module, resolved ) !== -1 ) {
// Module already resolved; nothing to do
return;
}
// Create unresolved if not passed in
if ( !unresolved ) {
unresolved = {};
}
// Tracks down dependencies
deps = registry[ module ].dependencies;
for ( i = 0; i < deps.length; i++ ) {
if ( $.inArray( deps[ i ], resolved ) === -1 ) {
if ( unresolved[ deps[ i ] ] ) {
throw new Error( mw.format(
'Circular reference detected: $1 -> $2',
module,
deps[ i ]
) );
}
// Add to unresolved
unresolved[ module ] = true;
sortDependencies( deps[ i ], resolved, unresolved );
}
}
resolved.push( module );
}
/**
* Get names of module that a module depends on, in their proper dependency order.
*
* @private
* @param {string[]} modules Array of string module names
* @return {Array} List of dependencies, including 'module'.
*/
function resolve( modules ) {
var resolved = [];
$.each( modules, function ( idx, module ) {
sortDependencies( module, resolved );
} );
return resolved;
}
/**
* Load and execute a script.
*
* @private
* @param {string} src URL to script, will be used as the src attribute in the script tag
* @return {jQuery.Promise}
*/
function addScript( src ) {
return $.ajax( {
url: src,
dataType: 'script',
// Force jQuery behaviour to be for crossDomain. Otherwise jQuery would use
// XHR for a same domain request instead of <script>, which changes the request
// headers (potentially missing a cache hit), and reduces caching in general
// since browsers cache XHR much less (if at all). And XHR means we retrieve
// text, so we'd need to $.globalEval, which then messes up line numbers.
crossDomain: true,
cache: true
} );
}
/**
* Queue the loading and execution of a script for a particular module.
*
* @private
* @param {string} src URL of the script
* @param {string} [moduleName] Name of currently executing module
* @return {jQuery.Promise}
*/
function queueModuleScript( src, moduleName ) {
var r = $.Deferred();
pendingRequests.push( function () {
if ( moduleName && hasOwn.call( registry, moduleName ) ) {
window.require = mw.loader.require;
window.module = registry[ moduleName ].module;
}
addScript( src ).always( function () {
// Clear environment
delete window.require;
delete window.module;
r.resolve();
// Start the next one (if any)
if ( pendingRequests[ 0 ] ) {
pendingRequests.shift()();
} else {
handlingPendingRequests = false;
}
} );
} );
if ( !handlingPendingRequests && pendingRequests[ 0 ] ) {
handlingPendingRequests = true;
pendingRequests.shift()();
}
return r.promise();
}
/**
* Utility function for execute()
*
* @ignore
*/
function addLink( media, url ) {
var el = document.createElement( 'link' );
el.rel = 'stylesheet';
if ( media && media !== 'all' ) {
el.media = media;
}
// If you end up here from an IE exception "SCRIPT: Invalid property value.",
// see #addEmbeddedCSS, bug 31676, and bug 47277 for details.
el.href = url;
$( getMarker() ).before( el );
}
/**
* 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, runScript,
cssHandlesRegistered = false;
if ( !hasOwn.call( registry, module ) ) {
throw new Error( 'Module has not been registered yet: ' + module );
}
if ( registry[ module ].state !== 'loaded' ) {
throw new Error( 'Module in state "' + registry[ module ].state + '" may not be executed: ' + module );
}
registry[ module ].state = 'executing';
runScript = function () {
var script, markModuleReady, nestedAddScript, legacyWait, implicitDependencies,
// Expand to include dependencies since we have to exclude both legacy modules
// and their dependencies from the legacyWait (to prevent a circular dependency).
legacyModules = resolve( mw.config.get( 'wgResourceLoaderLegacyModules', [] ) );
script = registry[ module ].script;
markModuleReady = function () {
registry[ module ].state = 'ready';
handlePending( module );
};
nestedAddScript = function ( arr, callback, i ) {
// Recursively call queueModuleScript() in its own callback
// for each element of arr.
if ( i >= arr.length ) {
// We're at the end of the array
callback();
return;
}
queueModuleScript( arr[ i ], module ).always( function () {
nestedAddScript( arr, callback, i + 1 );
} );
};
implicitDependencies = ( $.inArray( module, legacyModules ) !== -1 )
? []
: legacyModules;
if ( module === 'user' ) {
// Implicit dependency on the site module. Not real dependency because
// it should run after 'site' regardless of whether it succeeds or fails.
implicitDependencies.push( 'site' );
}
legacyWait = implicitDependencies.length
? mw.loader.using( implicitDependencies )
: $.Deferred().resolve();
legacyWait.always( function () {
try {
if ( $.isArray( script ) ) {
nestedAddScript( script, markModuleReady, 0 );
} else if ( typeof script === 'function' ) {
// Pass jQuery twice so that the signature of the closure which wraps
// the script can bind both '$' and 'jQuery'.
script( $, $, mw.loader.require, registry[ module ].module );
markModuleReady();
} else if ( typeof script === 'string' ) {
// Site and user modules are legacy scripts that run in the global scope.
// This is transported as a string instead of a function to avoid needing
// to use string manipulation to undo the function wrapper.
$.globalEval( script );
markModuleReady();
} else {
// Module without 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
registry[ module ].state = 'error';
mw.track( 'resourceloader.exception', { exception: e, module: module, source: 'module-execute' } );
handlePending( module );
}
} );
};
// Add localizations to message system
if ( registry[ module ].messages ) {
mw.messages.set( registry[ module ].messages );
}
// Initialise templates
if ( registry[ module ].templates ) {
mw.templates.set( module, registry[ module ].templates );
}
// Make sure we don't run the scripts until all 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 ( 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++ ) {
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++ ) {
addLink( media, urls[ i ] );
}
}
}
}
}
// Kick off.
cssHandlesRegistered = true;
checkCssHandles();
}
/**
* Add one or more modules to the module load queue.
*
* See also #work().
*
* @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
*/
function enqueue( dependencies, ready, error ) {
// 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.push( {
// Narrow down the list to modules that are worth waiting for
dependencies: $.grep( dependencies, function ( module ) {
var state = mw.loader.getState( module );
return state === 'registered' || state === 'loaded' || state === 'loading' || state === 'executing';
} ),
ready: ready,
error: error
} );
}
$.each( dependencies, function ( idx, module ) {
var state = mw.loader.getState( module );
// Only queue modules that are still in the initial 'registered' state
// (not ones already loading, ready or error).
if ( state === 'registered' && $.inArray( module, queue ) === -1 ) {
// Private modules must be embedded in the page. Don't bother queuing
// these as the server will deny them anyway (T101806).
if ( registry[ module ].group === 'private' ) {
registry[ module ].state = 'error';
handlePending( module );
return;
}
queue.push( module );
}
} );
mw.loader.work();
}
function sortQuery( o ) {
var key,
sorted = {},
a = [];
for ( key in o ) {
if ( hasOwn.call( o, 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
*
* @private
*/
function buildModulesString( moduleMap ) {
var p, prefix,
arr = [];
for ( prefix in moduleMap ) {
p = prefix === '' ? '' : prefix + '.';
arr.push( p + moduleMap[ prefix ].join( ',' ) );
}
return arr.join( '|' );
}
/**
* Make a network request to load modules from the server.
*
* @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
*/
function doRequest( moduleMap, currReqBase, sourceLoadScript ) {
var query = $.extend(
{ modules: buildModulesString( moduleMap ) },
currReqBase
);
query = sortQuery( query );
addScript( sourceLoadScript + '?' + $.param( query ) );
}
/**
* Resolve indexed dependencies.
*
* ResourceLoader uses an optimization to save space which replaces module names in
* dependency lists with the index of that module within the array of module
* registration data if it exists. The benefit is a significant reduction in the data
* size of the startup module. This function changes those dependency lists back to
* arrays of strings.
*
* @private
* @param {Array} modules Modules array
*/
function resolveIndexedDependencies( modules ) {
var i, j, deps;
function resolveIndex( dep ) {
return typeof dep === 'number' ? modules[ dep ][ 0 ] : dep;
}
for ( i = 0; i < modules.length; i++ ) {
deps = modules[ i ][ 2 ];
if ( deps ) {
for ( j = 0; j < deps.length; j++ ) {
deps[ j ] = resolveIndex( deps[ j ] );
}
}
}
}
/**
* Create network requests for a batch of modules.
*
* This is an internal method for #work(). This must not be called directly
* unless the modules are already registered, and no request is in progress,
* and the module state has already been set to `loading`.
*
* @private
* @param {string[]} batch
*/
function batchRequest( batch ) {
var reqBase, splits, maxQueryLength, b, bSource, bGroup, bSourceGroup,
source, group, i, modules, sourceLoadScript,
currReqBase, currReqBaseLength, moduleMap, l,
lastDotIndex, prefix, suffix, bytesAdded;
if ( !batch.length ) {
return;
}
// Always order modules alphabetically to help reduce cache
// misses for otherwise identical content.
batch.sort();
// Build a list of query parameters common to all requests
reqBase = {
skin: mw.config.get( 'skin' ),
lang: mw.config.get( 'wgUserLanguage' ),
debug: mw.config.get( 'debug' )
};
maxQueryLength = mw.config.get( 'wgResourceLoaderMaxQueryLength', 2000 );
// Split module list by source and by group.
splits = {};
for ( b = 0; b < batch.length; b++ ) {
bSource = registry[ batch[ b ] ].source;
bGroup = registry[ batch[ b ] ].group;
if ( !hasOwn.call( splits, bSource ) ) {
splits[ bSource ] = {};
}
if ( !hasOwn.call( splits[ bSource ], bGroup ) ) {
splits[ bSource ][ bGroup ] = [];
}
bSourceGroup = splits[ bSource ][ bGroup ];
bSourceGroup.push( batch[ b ] );
}
for ( source in splits ) {
sourceLoadScript = sources[ source ];
for ( group in splits[ source ] ) {
// Cache access to currently selected list of
// modules for this group from this source.
modules = splits[ source ][ group ];
currReqBase = $.extend( {
version: getCombinedVersion( modules )
}, reqBase );
// For user modules append a user name to the query string.
if ( group === 'user' && mw.config.get( 'wgUserName' ) !== null ) {
currReqBase.user = mw.config.get( 'wgUserName' );
}
currReqBaseLength = $.param( currReqBase ).length;
// We may need to split up the request to honor the query string length limit,
// so build it piece by piece.
l = currReqBaseLength + 9; // '&modules='.length == 9
moduleMap = {}; // { prefix: [ suffixes ] }
for ( i = 0; i < modules.length; i++ ) {
// Determine how many bytes this module would add to the query string
lastDotIndex = modules[ i ].lastIndexOf( '.' );
// If lastDotIndex is -1, substr() returns an empty string
prefix = modules[ i ].substr( 0, lastDotIndex );
suffix = modules[ i ].slice( lastDotIndex + 1 );
bytesAdded = hasOwn.call( moduleMap, prefix )
? suffix.length + 3 // '%2C'.length == 3
: modules[ i ].length + 3; // '%7C'.length == 3
// If the url would become too long, create a new one,
// but don't create empty requests
if ( maxQueryLength > 0 && !$.isEmptyObject( moduleMap ) && l + bytesAdded > maxQueryLength ) {
// This url would become too long, create a new one, and start the old one
doRequest( moduleMap, currReqBase, sourceLoadScript );
moduleMap = {};
l = currReqBaseLength + 9;
mw.track( 'resourceloader.splitRequest', { maxQueryLength: maxQueryLength } );
}
if ( !hasOwn.call( moduleMap, prefix ) ) {
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 );
}
}
}
}
/**
* Evaluate a batch of load.php responses retrieved from mw.loader.store.
*
* @private
* @param {string[]} implementations Array containing pieces of JavaScript code in the
* form of calls to mw.loader#implement().
* @param {Function} cb Callback in case of failure
* @param {Error} cb.err
*/
function batchEval( implementations, cb ) {
if ( !implementations.length ) {
return;
}
mw.requestIdleCallback( function iterate( deadline ) {
while ( implementations[ 0 ] && deadline.timeRemaining() > 5 ) {
try {
$.globalEval( implementations.shift() );
} catch ( err ) {
cb( err );
return;
}
}
if ( implementations[ 0 ] ) {
mw.requestIdleCallback( iterate );
}
} );
}
/* Public Members */
return {
/**
* The module registry is exposed as an aid for debugging and inspecting page
* state; it is not a public interface for modifying the registry.
*
* @see #registry
* @property
* @private
*/
moduleRegistry: registry,
/**
* @inheritdoc #newStyleTag
* @method
*/
addStyleTag: newStyleTag,
/**
* Start loading of all queued module dependencies.
*
* @protected
*/
work: function () {
var q, batch, implementations, sourceModules;
batch = [];
// Appends a list of modules from the queue to the batch
for ( q = 0; q < queue.length; q++ ) {
// Only load modules which are registered
if ( hasOwn.call( registry, queue[ q ] ) && registry[ queue[ q ] ].state === 'registered' ) {
// Prevent duplicate entries
if ( $.inArray( queue[ q ], batch ) === -1 ) {
batch.push( queue[ q ] );
// Mark registered modules as loading
registry[ queue[ q ] ].state = 'loading';
}
}
}
// Now that the queue has been processed into a batch, clear the queue.
// This MUST happen before we initiate any eval or network request. Otherwise,
// it is possible for a cached script to instantly trigger the same work queue
// again; all before we've cleared it causing each request to include modules
// which are already loaded.
queue = [];
if ( !batch.length ) {
return;
}
mw.loader.store.init();
if ( mw.loader.store.enabled ) {
implementations = [];
sourceModules = [];
batch = $.grep( batch, function ( module ) {
var implementation = mw.loader.store.get( module );
if ( implementation ) {
implementations.push( implementation );
sourceModules.push( module );
return false;
}
return true;
} );
batchEval( implementations, function ( err ) {
// Not good, the cached mw.loader.implement calls failed! This should
// never happen, barring ResourceLoader bugs, browser bugs and PEBKACs.
// Depending on how corrupt the string is, it is likely that some
// modules' implement() succeeded while the ones after the error will
// never run and leave their modules in the 'loading' state forever.
// Since this is an error not caused by an individual module but by
// something that infected the implement call itself, don't take any
// risks and clear everything in this cache.
mw.loader.store.clear();
mw.track( 'resourceloader.exception', { exception: err, source: 'store-eval' } );
// Re-add the failed ones that are still pending back to the batch
var failed = $.grep( sourceModules, function ( module ) {
return registry[ module ].state === 'loading';
} );
batchRequest( failed );
} );
}
batchRequest( batch );
},
/**
* Register a source.
*
* The #work() method will use this information to split up requests by source.
*
* mw.loader.addSource( 'mediawikiwiki', '//www.mediawiki.org/w/load.php' );
*
* @param {string|Object} id Source ID, or object mapping ids to load urls
* @param {string} loadUrl Url to a load.php end point
* @throws {Error} If source id is already registered
*/
addSource: function ( id, loadUrl ) {
var source;
// Allow multiple additions
if ( typeof id === 'object' ) {
for ( source in id ) {
mw.loader.addSource( source, id[ source ] );
}
return;
}
if ( hasOwn.call( sources, id ) ) {
throw new Error( 'source already registered: ' + id );
}
sources[ id ] = loadUrl;
},
/**
* Register a module, letting the system know about it and its properties.
*
* The startup modules contain calls to this method.
*
* When using multiple module registration by passing an array, dependencies that
* are specified as references to modules within the array will be resolved before
* the modules are registered.
*
* @param {string|Array} module Module name or array of arrays, each containing
* a list of arguments compatible with this method
* @param {string|number} version Module version hash (falls backs to empty string)
* Can also be a number (timestamp) for compatibility with MediaWiki 1.25 and earlier.
* @param {string|Array|Function} dependencies One string or array of strings of module
* names on which this module depends, or a function that returns that array.
* @param {string} [group=null] Group which the module is in
* @param {string} [source='local'] Name of the source
* @param {string} [skip=null] Script body of the skip function
*/
register: function ( module, version, dependencies, group, source, skip ) {
var i, deps;
// Allow multiple registration
if ( typeof module === 'object' ) {
resolveIndexedDependencies( module );
for ( i = 0; i < module.length; i++ ) {
// module is an array of module names
if ( typeof module[ i ] === 'string' ) {
mw.loader.register( module[ i ] );
// module is an array of arrays
} else if ( typeof module[ i ] === 'object' ) {
mw.loader.register.apply( mw.loader, module[ i ] );
}
}
return;
}
if ( hasOwn.call( registry, module ) ) {
throw new Error( 'module already registered: ' + module );
}
if ( typeof dependencies === 'string' ) {
// A single module name
deps = [ dependencies ];
} else if ( typeof dependencies === 'object' || typeof dependencies === 'function' ) {
// Array of module names or a function that returns an array
deps = dependencies;
}
// List the module as registered
registry[ module ] = {
// Exposed to execute() for mw.loader.implement() closures.
// Import happens via require().
module: {
exports: {}
},
version: version !== undefined ? String( version ) : '',
dependencies: deps || [],
group: typeof group === 'string' ? group : null,
source: typeof source === 'string' ? source : 'local',
state: 'registered',
skip: typeof skip === 'string' ? skip : null
};
},
/**
* Implement a module given the components that make up the module.
*
* When #load() or #using() requests one or more modules, the server
* response contain calls to this function.
*
* @param {string} module Name of module
* @param {Function|Array|string} [script] Function with module code, list of URLs
* to load via `<script src>`, or string of module code for `$.globalEval()`.
* @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.
*
* @protected
* @param {Object} [messages] List of key/value pairs to be added to mw#messages.
* @param {Object} [templates] List of key/value pairs to be added to mw#templates.
*/
implement: function ( module, script, style, messages, templates ) {
// Automatically register module
if ( !hasOwn.call( registry, module ) ) {
mw.loader.register( module );
}
// Check for duplicate implementation
if ( hasOwn.call( registry, module ) && registry[ module ].script !== undefined ) {
throw new Error( 'module already implemented: ' + module );
}
// Attach components
registry[ module ].script = script || null;
registry[ module ].style = style || null;
registry[ module ].messages = messages || null;
registry[ module ].templates = templates || null;
// 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 );
}
}
},
/**
* Execute a function as soon as one or more required modules are ready.
*
* Example of inline dependency on OOjs:
*
* mw.loader.using( 'oojs', function () {
* OO.compare( [ 1 ], [ 1 ] );
* } );
*
* Since MediaWiki 1.23 this also returns a promise.
*
* Since MediaWiki 1.28 the promise is resolved with a `require` function.
*
* @param {string|Array} dependencies Module name or array of modules names the
* callback depends on to be ready before executing
* @param {Function} [ready] Callback to execute when all dependencies are ready
* @param {Function} [error] Callback to execute if one or more dependencies failed
* @return {jQuery.Promise} With a `require` function
*/
using: function ( dependencies, ready, error ) {
var deferred = $.Deferred();
// Allow calling with a single dependency as a string
if ( typeof dependencies === 'string' ) {
dependencies = [ dependencies ];
}
if ( ready ) {
deferred.done( ready );
}
if ( error ) {
deferred.fail( error );
}
// Resolve entire dependency map
dependencies = resolve( dependencies );
if ( allReady( dependencies ) ) {
// Run ready immediately
deferred.resolve( mw.loader.require );
} else if ( anyFailed( dependencies ) ) {
// Execute error immediately if any dependencies have errors
deferred.reject(
new Error( 'One or more dependencies failed to load' ),
dependencies
);
} else {
// Not all dependencies are ready, add to the load queue
enqueue( dependencies, function () {
deferred.resolve( mw.loader.require );
}, deferred.reject );
}
return deferred.promise();
},
/**
* Load an external script or one or more modules.
*
* @param {string|Array} modules Either the name of a module, array of modules,
* or a URL of an external script or style
* @param {string} [type='text/javascript'] 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.
*/
load: function ( modules, type ) {
var filtered, l;
// Allow calling with a url or single dependency as a string
if ( typeof modules === 'string' ) {
// "https://example.org/x.js", "http://example.org/x.js", "//example.org/x.js", "/x.js"
if ( /^(https?:)?\/?\//.test( modules ) ) {
if ( type === 'text/css' ) {
// Support: IE 7-8
// Use properties instead of attributes as IE throws security
// warnings when inserting a <link> tag with a protocol-relative
// URL set though attributes - when on HTTPS. See bug 41331.
l = document.createElement( 'link' );
l.rel = 'stylesheet';
l.href = modules;
$( 'head' ).append( l );
return;
}
if ( type === 'text/javascript' || type === undefined ) {
addScript( modules );
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.
filtered = $.grep( modules, function ( module ) {
var state = mw.loader.getState( module );
return state !== null && state !== 'error' && state !== 'missing';
} );
if ( filtered.length === 0 ) {
return;
}
// Resolve entire dependency map
filtered = resolve( filtered );
// If all modules are ready, or if any modules have errors, nothing to be done.
if ( allReady( filtered ) || anyFailed( filtered ) ) {
return;
}
// Some modules are not yet ready, add to module load queue.
enqueue( filtered, undefined, undefined );
},
/**
* Change the state of one or more modules.
*
* @param {string|Object} module Module name or object of module name/state pairs
* @param {string} state State name
*/
state: function ( module, state ) {
var m;
if ( typeof module === 'object' ) {
for ( m in module ) {
mw.loader.state( m, module[ m ] );
}
return;
}
if ( !hasOwn.call( registry, module ) ) {
mw.loader.register( module );
}
registry[ module ].state = state;
if ( $.inArray( state, [ 'ready', 'error', 'missing' ] ) !== -1 ) {
// Make sure pending modules depending on this one get executed if their
// dependencies are now fulfilled!
handlePending( module );
}
},
/**
* Get the version of a module.
*
* @param {string} module Name of module
* @return {string|null} The version, or null if the module (or its version) is not
* in the registry.
*/
getVersion: function ( module ) {
if ( !hasOwn.call( registry, module ) || registry[ module ].version === undefined ) {
return null;
}
return registry[ module ].version;
},
/**
* Get the state of a module.
*
* @param {string} module Name of module
* @return {string|null} The state, or null if the module (or its state) is not
* in the registry.
*/
getState: function ( module ) {
if ( !hasOwn.call( registry, module ) || registry[ module ].state === undefined ) {
return null;
}
return registry[ module ].state;
},
/**
* Get the names of all registered modules.
*
* @return {Array}
*/
getModuleNames: function () {
return $.map( registry, function ( i, key ) {
return key;
} );
},
/**
* Get the exported value of a module.
*
* Modules may provide this via their local `module.exports`.
*
* @protected
* @since 1.27
*/
require: function ( moduleName ) {
var state = mw.loader.getState( moduleName );
// Only ready modules can be required
if ( state !== 'ready' ) {
// Module may've forgotten to declare a dependency
throw new Error( 'Module "' + moduleName + '" is not loaded.' );
}
return registry[ moduleName ].module.exports;
},
/**
* @inheritdoc mw.inspect#runReports
* @method
*/
inspect: function () {
var args = slice.call( arguments );
mw.loader.using( 'mediawiki.inspect', function () {
mw.inspect.runReports.apply( mw.inspect, args );
} );
},
/**
* On browsers that implement the localStorage API, the module store serves as a
* smart complement to the browser cache. Unlike the browser cache, the module store
* can slice a concatenated response from ResourceLoader into its constituent
* modules and cache each of them separately, using each module's versioning scheme
* to determine when the cache should be invalidated.
*
* @singleton
* @class mw.loader.store
*/
store: {
// Whether the store is in use on this page.
enabled: null,
MODULE_SIZE_MAX: 100 * 1000,
// The contents of the store, mapping '[module name]@[version]' keys
// to module implementations.
items: {},
// Cache hit stats
stats: { hits: 0, misses: 0, expired: 0 },
/**
* Construct a JSON-serializable object representing the content of the store.
*
* @return {Object} Module store contents.
*/
toJSON: function () {
return { items: mw.loader.store.items, vary: mw.loader.store.getVary() };
},
/**
* Get the localStorage key for the entire module store. The key references
* $wgDBname to prevent clashes between wikis which share a common host.
*
* @return {string} localStorage item key
*/
getStoreKey: function () {
return 'MediaWikiModuleStore:' + mw.config.get( 'wgDBname' );
},
/**
* Get a key on which to vary the module cache.
*
* @return {string} String of concatenated vary conditions.
*/
getVary: function () {
return [
mw.config.get( 'skin' ),
mw.config.get( 'wgResourceLoaderStorageVersion' ),
mw.config.get( 'wgUserLanguage' )
].join( ':' );
},
/**
* Get a key for a specific module. The key format is '[name]@[version]'.
*
* @param {string} module Module name
* @return {string|null} Module key or null if module does not exist
*/
getModuleKey: function ( module ) {
return hasOwn.call( registry, module ) ?
( module + '@' + registry[ module ].version ) : null;
},
/**
* Initialize the store.
*
* Retrieves store from localStorage and (if successfully retrieved) decoding
* the stored JSON value to a plain object.
*
* The try / catch block is used for JSON & localStorage feature detection.
* See the in-line documentation for Modernizr's localStorage feature detection
* code for a full account of why we need a try / catch:
* <https://github.com/Modernizr/Modernizr/blob/v2.7.1/modernizr.js#L771-L796>.
*/
init: function () {
var raw, data;
if ( mw.loader.store.enabled !== null ) {
// Init already ran
return;
}
if (
// Disabled because localStorage quotas are tight and (in Firefox's case)
// shared by multiple origins.
// See T66721, and <https://bugzilla.mozilla.org/show_bug.cgi?id=1064466>.
/Firefox|Opera/.test( navigator.userAgent ) ||
// Disabled by configuration.
!mw.config.get( 'wgResourceLoaderStorageEnabled' )
) {
// Clear any previous store to free up space. (T66721)
mw.loader.store.clear();
mw.loader.store.enabled = false;
return;
}
if ( mw.config.get( 'debug' ) ) {
// Disable module store in debug mode
mw.loader.store.enabled = false;
return;
}
try {
raw = localStorage.getItem( mw.loader.store.getStoreKey() );
// If we get here, localStorage is available; mark enabled
mw.loader.store.enabled = true;
data = JSON.parse( raw );
if ( data && typeof data.items === 'object' && data.vary === mw.loader.store.getVary() ) {
mw.loader.store.items = data.items;
return;
}
} catch ( e ) {
mw.track( 'resourceloader.exception', { exception: e, source: 'store-localstorage-init' } );
}
if ( raw === undefined ) {
// localStorage failed; disable store
mw.loader.store.enabled = false;
} else {
mw.loader.store.update();
}
},
/**
* Retrieve a module from the store and update cache hit stats.
*
* @param {string} module Module name
* @return {string|boolean} Module implementation or false if unavailable
*/
get: function ( module ) {
var key;
if ( !mw.loader.store.enabled ) {
return false;
}
key = mw.loader.store.getModuleKey( module );
if ( key in mw.loader.store.items ) {
mw.loader.store.stats.hits++;
return mw.loader.store.items[ key ];
}
mw.loader.store.stats.misses++;
return false;
},
/**
* Stringify a module and queue it for storage.
*
* @param {string} module Module name
* @param {Object} descriptor The module's descriptor as set in the registry
*/
set: function ( module, descriptor ) {
var args, key, src;
if ( !mw.loader.store.enabled ) {
return false;
}
key = mw.loader.store.getModuleKey( module );
if (
// Already stored a copy of this exact version
key in mw.loader.store.items ||
// Module failed to load
descriptor.state !== 'ready' ||
// Unversioned, private, or site-/user-specific
( !descriptor.version || $.inArray( descriptor.group, [ 'private', 'user' ] ) !== -1 ) ||
// Partial descriptor
// (e.g. skipped module, or style module with state=ready)
$.inArray( undefined, [ descriptor.script, descriptor.style,
descriptor.messages, descriptor.templates ] ) !== -1
) {
// Decline to store
return false;
}
try {
args = [
JSON.stringify( module ),
typeof descriptor.script === 'function' ?
String( descriptor.script ) :
JSON.stringify( descriptor.script ),
JSON.stringify( descriptor.style ),
JSON.stringify( descriptor.messages ),
JSON.stringify( descriptor.templates )
];
// Attempted workaround for a possible Opera bug (bug T59567).
// This regex should never match under sane conditions.
if ( /^\s*\(/.test( args[ 1 ] ) ) {
args[ 1 ] = 'function' + args[ 1 ];
mw.track( 'resourceloader.assert', { source: 'bug-T59567' } );
}
} catch ( e ) {
mw.track( 'resourceloader.exception', { exception: e, source: 'store-localstorage-json' } );
return;
}
src = 'mw.loader.implement(' + args.join( ',' ) + ');';
if ( src.length > mw.loader.store.MODULE_SIZE_MAX ) {
return false;
}
mw.loader.store.items[ key ] = src;
mw.loader.store.update();
},
/**
* Iterate through the module store, removing any item that does not correspond
* (in name and version) to an item in the module registry.
*/
prune: function () {
var key, module;
if ( !mw.loader.store.enabled ) {
return false;
}
for ( key in mw.loader.store.items ) {
module = key.slice( 0, key.indexOf( '@' ) );
if ( mw.loader.store.getModuleKey( module ) !== key ) {
mw.loader.store.stats.expired++;
delete mw.loader.store.items[ key ];
} else if ( mw.loader.store.items[ key ].length > mw.loader.store.MODULE_SIZE_MAX ) {
// This value predates the enforcement of a size limit on cached modules.
delete mw.loader.store.items[ key ];
}
}
},
/**
* Clear the entire module store right now.
*/
clear: function () {
mw.loader.store.items = {};
try {
localStorage.removeItem( mw.loader.store.getStoreKey() );
} catch ( ignored ) {}
},
/**
* Sync in-memory store back to localStorage.
*
* This function debounces updates. When called with a flush already pending,
* the call is coalesced into the pending update. The call to
* localStorage.setItem will be naturally deferred until the page is quiescent.
*
* Because localStorage is shared by all pages from the same origin, if multiple
* pages are loaded with different module sets, the possibility exists that
* modules saved by one page will be clobbered by another. But the impact would
* be minor and the problem would be corrected by subsequent page views.
*
* @method
*/
update: ( function () {
var hasPendingWrite = false;
function flushWrites() {
var data, key;
if ( !hasPendingWrite || !mw.loader.store.enabled ) {
return;
}
mw.loader.store.prune();
key = mw.loader.store.getStoreKey();
try {
// Replacing the content of the module store might fail if the new
// contents would exceed the browser's localStorage size limit. To
// avoid clogging the browser with stale data, always remove the old
// value before attempting to set the new one.
localStorage.removeItem( key );
data = JSON.stringify( mw.loader.store );
localStorage.setItem( key, data );
} catch ( e ) {
mw.track( 'resourceloader.exception', { exception: e, source: 'store-localstorage-update' } );
}
hasPendingWrite = false;
}
return function () {
if ( !hasPendingWrite ) {
hasPendingWrite = true;
mw.requestIdleCallback( flushWrites );
}
};
}() )
}
};
}() ),
/**
* HTML construction helper functions
*
* @example
*
* var Html, output;
*
* Html = mw.html;
* output = Html.element( 'div', {}, new Html.Raw(
* Html.element( 'img', { src: '<' } )
* ) );
* mw.log( output ); // <div><img src="<"/></div>
*
* @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.
*
* mw.html.escape( '< > \' & "' );
* // Returns < > ' & "
*
* @param {string} s The string to escape
* @return {string} HTML
*/
escape: function ( s ) {
return s.replace( /['"<>&]/g, escapeCallback );
},
/**
* Create an HTML element string, with safe escaping.
*
* @param {string} name The tag name.
* @param {Object} [attrs] An object with members mapping element names to values
* @param {string|mw.html.Raw|mw.html.Cdata|null} [contents=null] The contents of the element.
*
* - string: Text to be escaped.
* - null: The element is treated as void with short closing form, e.g. `<br/>`.
* - this.Raw: The raw value is directly included.
* - this.Cdata: The raw value is directly included. An exception is
* thrown if it contains any illegal ETAGO delimiter.
* See <http://www.w3.org/TR/html401/appendix/notes.html#h-B.3.2>.
* @return {string} HTML
*/
element: function ( name, attrs, contents ) {
var v, attrName, s = '<' + name;
if ( attrs ) {
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;
},
/**
* 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;
}
};
}() ),
// Skeleton user object, extended by the 'mediawiki.user' module.
/**
* @class mw.user
* @singleton
*/
user: {
/**
* @property {mw.Map}
*/
options: new Map(),
/**
* @property {mw.Map}
*/
tokens: new Map()
},
// OOUI widgets specific to MediaWiki
widgets: {},
/**
* Registry and firing of events.
*
* MediaWiki has various interface components that are extended, enhanced
* or manipulated in some other way by extensions, gadgets and even
* in core itself.
*
* This framework helps streamlining the timing of when these other
* code paths fire their plugins (instead of using document-ready,
* which can and should be limited to firing only once).
*
* Features like navigating to other wiki pages, previewing an edit
* and editing itself – without a refresh – can then retrigger these
* hooks accordingly to ensure everything still works as expected.
*
* Example usage:
*
* mw.hook( 'wikipage.content' ).add( fn ).remove( fn );
* mw.hook( 'wikipage.content' ).fire( $content );
*
* Handlers can be added and fired for arbitrary event names at any time. The same
* event can be fired multiple times. The last run of an event is memorized
* (similar to `$(document).ready` and `$.Deferred().done`).
* This means if an event is fired, and a handler added afterwards, the added
* function will be fired right away with the last given event data.
*
* Like Deferreds and Promises, the mw.hook object is both detachable and chainable.
* Thus allowing flexible use and optimal maintainability and authority control.
* You can pass around the `add` and/or `fire` method to another piece of code
* without it having to know the event name (or `mw.hook` for that matter).
*
* var h = mw.hook( 'bar.ready' );
* new mw.Foo( .. ).fetch( { callback: h.fire } );
*
* Note: Events are documented with an underscore instead of a dot in the event
* name due to jsduck not supporting dots in that position.
*
* @class mw.hook
*/
hook: ( function () {
var lists = {};
/**
* Create an instance of mw.hook.
*
* @method hook
* @member mw
* @param {string} name Name of hook.
* @return {mw.hook}
*/
return function ( name ) {
var list = hasOwn.call( lists, name ) ?
lists[ name ] :
lists[ name ] = $.Callbacks( 'memory' );
return {
/**
* Register a hook handler
*
* @param {...Function} handler Function to bind.
* @chainable
*/
add: list.add,
/**
* Unregister a hook handler
*
* @param {...Function} handler Function to unbind.
* @chainable
*/
remove: list.remove,
/**
* Run a hook.
*
* @param {...Mixed} data
* @chainable
*/
fire: function () {
return list.fireWith.call( this, null, slice.call( arguments ) );
}
};
};
}() )
};
// Alias $j to jQuery for backwards compatibility
// @deprecated since 1.23 Use $ or jQuery instead
mw.log.deprecate( window, '$j', $, 'Use $ or jQuery instead.' );
/**
* 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 instead of caching the
* reference, so that debugging tools loaded later are supported (e.g. Firebug Lite in IE).
*
* @private
* @method log_
* @param {string} topic Stream name passed by mw.track
* @param {Object} data Data passed by mw.track
* @param {Error} [data.exception]
* @param {string} data.source Error source
* @param {string} [data.module] Name of module which caused the error
*/
function log( topic, data ) {
var msg,
e = data.exception,
source = data.source,
module = data.module,
console = window.console;
if ( console && console.log ) {
msg = ( e ? 'Exception' : 'Error' ) + ' in ' + source;
if ( module ) {
msg += ' in module ' + module;
}
msg += ( e ? ':' : '.' );
console.log( msg );
// If we have an exception object, log it to the error channel to trigger
// proper stacktraces in browsers that support it. No fallback as we have
// no browsers that don't support error(), but do support log().
if ( e && console.error ) {
console.error( String( e ), e );
}
}
}
// Subscribe to error streams
mw.trackSubscribe( 'resourceloader.exception', log );
mw.trackSubscribe( 'resourceloader.assert', log );
/**
* Fired when all modules associated with the page have finished loading.
*
* @event resourceloader_loadEnd
* @member mw.hook
*/
$( function () {
var loading = $.grep( mw.loader.getModuleNames(), function ( module ) {
return mw.loader.getState( module ) === 'loading';
} );
// We only need a callback, not any actual module. First try a single using()
// for all loading modules. If one fails, fall back to tracking each module
// separately via $.when(), this is expensive.
loading = mw.loader.using( loading ).then( null, function () {
var all = $.map( loading, function ( module ) {
return mw.loader.using( module ).then( null, function () {
return $.Deferred().resolve();
} );
} );
return $.when.apply( $, all );
} );
loading.then( function () {
mwPerformance.mark( 'mwLoadEnd' );
mw.hook( 'resourceloader.loadEnd' ).fire();
} );
} );
// Attach to window and globally alias
window.mw = window.mediaWiki = mw;
}( jQuery ) );
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