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+/*!
+ * OOjs v2.2.0 optimised for jQuery
+ * https://www.mediawiki.org/wiki/OOjs
+ *
+ * Copyright 2011-2018 OOjs Team and other contributors.
+ * Released under the MIT license
+ * https://oojs.mit-license.org
+ *
+ * Date: 2018-04-03T19:45:13Z
+ */
+( function ( global ) {
+
+'use strict';
+
+var
+ /**
+ * Namespace for all classes, static methods and static properties.
+ * @class OO
+ * @singleton
+ */
+ oo = {},
+ // Optimisation: Local reference to Object.prototype.hasOwnProperty
+ hasOwn = oo.hasOwnProperty,
+ // Marking this as "exported" doesn't work when parserOptions.sourceType is module
+ // eslint-disable-next-line no-unused-vars
+ toString = oo.toString;
+
+/* Class Methods */
+
+/**
+ * Utility to initialize a class for OO inheritance.
+ *
+ * Currently this just initializes an empty static object.
+ *
+ * @param {Function} fn
+ */
+oo.initClass = function ( fn ) {
+ fn.static = fn.static || {};
+};
+
+/**
+ * Inherit from prototype to another using Object#create.
+ *
+ * Beware: This redefines the prototype, call before setting your prototypes.
+ *
+ * Beware: This redefines the prototype, can only be called once on a function.
+ * If called multiple times on the same function, the previous prototype is lost.
+ * This is how prototypal inheritance works, it can only be one straight chain
+ * (just like classical inheritance in PHP for example). If you need to work with
+ * multiple constructors consider storing an instance of the other constructor in a
+ * property instead, or perhaps use a mixin (see OO.mixinClass).
+ *
+ * function Thing() {}
+ * Thing.prototype.exists = function () {};
+ *
+ * function Person() {
+ * Person.super.apply( this, arguments );
+ * }
+ * OO.inheritClass( Person, Thing );
+ * Person.static.defaultEyeCount = 2;
+ * Person.prototype.walk = function () {};
+ *
+ * function Jumper() {
+ * Jumper.super.apply( this, arguments );
+ * }
+ * OO.inheritClass( Jumper, Person );
+ * Jumper.prototype.jump = function () {};
+ *
+ * Jumper.static.defaultEyeCount === 2;
+ * var x = new Jumper();
+ * x.jump();
+ * x.walk();
+ * x instanceof Thing && x instanceof Person && x instanceof Jumper;
+ *
+ * @param {Function} targetFn
+ * @param {Function} originFn
+ * @throws {Error} If target already inherits from origin
+ */
+oo.inheritClass = function ( targetFn, originFn ) {
+ var targetConstructor;
+
+ if ( !originFn ) {
+ throw new Error( 'inheritClass: Origin is not a function (actually ' + originFn + ')' );
+ }
+ if ( targetFn.prototype instanceof originFn ) {
+ throw new Error( 'inheritClass: Target already inherits from origin' );
+ }
+
+ targetConstructor = targetFn.prototype.constructor;
+
+ // [DEPRECATED] Provide .parent as alias for code supporting older browsers which
+ // allows people to comply with their style guide.
+ targetFn.super = targetFn.parent = originFn;
+
+ targetFn.prototype = Object.create( originFn.prototype, {
+ // Restore constructor property of targetFn
+ constructor: {
+ value: targetConstructor,
+ enumerable: false,
+ writable: true,
+ configurable: true
+ }
+ } );
+
+ // Extend static properties - always initialize both sides
+ oo.initClass( originFn );
+ targetFn.static = Object.create( originFn.static );
+};
+
+/**
+ * Copy over *own* prototype properties of a mixin.
+ *
+ * The 'constructor' (whether implicit or explicit) is not copied over.
+ *
+ * This does not create inheritance to the origin. If you need inheritance,
+ * use OO.inheritClass instead.
+ *
+ * Beware: This can redefine a prototype property, call before setting your prototypes.
+ *
+ * Beware: Don't call before OO.inheritClass.
+ *
+ * function Foo() {}
+ * function Context() {}
+ *
+ * // Avoid repeating this code
+ * function ContextLazyLoad() {}
+ * ContextLazyLoad.prototype.getContext = function () {
+ * if ( !this.context ) {
+ * this.context = new Context();
+ * }
+ * return this.context;
+ * };
+ *
+ * function FooBar() {}
+ * OO.inheritClass( FooBar, Foo );
+ * OO.mixinClass( FooBar, ContextLazyLoad );
+ *
+ * @param {Function} targetFn
+ * @param {Function} originFn
+ */
+oo.mixinClass = function ( targetFn, originFn ) {
+ var key;
+
+ if ( !originFn ) {
+ throw new Error( 'mixinClass: Origin is not a function (actually ' + originFn + ')' );
+ }
+
+ // Copy prototype properties
+ for ( key in originFn.prototype ) {
+ if ( key !== 'constructor' && hasOwn.call( originFn.prototype, key ) ) {
+ targetFn.prototype[ key ] = originFn.prototype[ key ];
+ }
+ }
+
+ // Copy static properties - always initialize both sides
+ oo.initClass( targetFn );
+ if ( originFn.static ) {
+ for ( key in originFn.static ) {
+ if ( hasOwn.call( originFn.static, key ) ) {
+ targetFn.static[ key ] = originFn.static[ key ];
+ }
+ }
+ } else {
+ oo.initClass( originFn );
+ }
+};
+
+/**
+ * Test whether one class is a subclass of another, without instantiating it.
+ *
+ * Every class is considered a subclass of Object and of itself.
+ *
+ * @param {Function} testFn The class to be tested
+ * @param {Function} baseFn The base class
+ * @return {boolean} Whether testFn is a subclass of baseFn (or equal to it)
+ */
+oo.isSubclass = function ( testFn, baseFn ) {
+ return testFn === baseFn || testFn.prototype instanceof baseFn;
+};
+
+/* Object Methods */
+
+/**
+ * Get a deeply nested property of an object using variadic arguments, protecting against
+ * undefined property errors.
+ *
+ * `quux = OO.getProp( obj, 'foo', 'bar', 'baz' );` is equivalent to `quux = obj.foo.bar.baz;`
+ * except that the former protects against JS errors if one of the intermediate properties
+ * is undefined. Instead of throwing an error, this function will return undefined in
+ * that case.
+ *
+ * @param {Object} obj
+ * @param {...Mixed} [keys]
+ * @return {Object|undefined} obj[arguments[1]][arguments[2]].... or undefined
+ */
+oo.getProp = function ( obj ) {
+ var i,
+ retval = obj;
+ for ( i = 1; i < arguments.length; i++ ) {
+ if ( retval === undefined || retval === null ) {
+ // Trying to access a property of undefined or null causes an error
+ return undefined;
+ }
+ retval = retval[ arguments[ i ] ];
+ }
+ return retval;
+};
+
+/**
+ * Set a deeply nested property of an object using variadic arguments, protecting against
+ * undefined property errors.
+ *
+ * `oo.setProp( obj, 'foo', 'bar', 'baz' );` is equivalent to `obj.foo.bar = baz;` except that
+ * the former protects against JS errors if one of the intermediate properties is
+ * undefined. Instead of throwing an error, undefined intermediate properties will be
+ * initialized to an empty object. If an intermediate property is not an object, or if obj itself
+ * is not an object, this function will silently abort.
+ *
+ * @param {Object} obj
+ * @param {...Mixed} [keys]
+ * @param {Mixed} [value]
+ */
+oo.setProp = function ( obj ) {
+ var i,
+ prop = obj;
+ if ( Object( obj ) !== obj || arguments.length < 2 ) {
+ return;
+ }
+ for ( i = 1; i < arguments.length - 2; i++ ) {
+ if ( prop[ arguments[ i ] ] === undefined ) {
+ prop[ arguments[ i ] ] = {};
+ }
+ if ( Object( prop[ arguments[ i ] ] ) !== prop[ arguments[ i ] ] ) {
+ return;
+ }
+ prop = prop[ arguments[ i ] ];
+ }
+ prop[ arguments[ arguments.length - 2 ] ] = arguments[ arguments.length - 1 ];
+};
+
+/**
+ * Delete a deeply nested property of an object using variadic arguments, protecting against
+ * undefined property errors, and deleting resulting empty objects.
+ *
+ * @param {Object} obj
+ * @param {...Mixed} [keys]
+ */
+oo.deleteProp = function ( obj ) {
+ var i,
+ prop = obj,
+ props = [ prop ];
+ if ( Object( obj ) !== obj || arguments.length < 2 ) {
+ return;
+ }
+ for ( i = 1; i < arguments.length - 1; i++ ) {
+ if ( prop[ arguments[ i ] ] === undefined || Object( prop[ arguments[ i ] ] ) !== prop[ arguments[ i ] ] ) {
+ return;
+ }
+ prop = prop[ arguments[ i ] ];
+ props.push( prop );
+ }
+ delete prop[ arguments[ i ] ];
+ // Walk back through props removing any plain empty objects
+ while ( props.length > 1 && ( prop = props.pop() ) && oo.isPlainObject( prop ) && !Object.keys( prop ).length ) {
+ delete props[ props.length - 1 ][ arguments[ props.length ] ];
+ }
+};
+
+/**
+ * Create a new object that is an instance of the same
+ * constructor as the input, inherits from the same object
+ * and contains the same own properties.
+ *
+ * This makes a shallow non-recursive copy of own properties.
+ * To create a recursive copy of plain objects, use #copy.
+ *
+ * var foo = new Person( mom, dad );
+ * foo.setAge( 21 );
+ * var foo2 = OO.cloneObject( foo );
+ * foo.setAge( 22 );
+ *
+ * // Then
+ * foo2 !== foo; // true
+ * foo2 instanceof Person; // true
+ * foo2.getAge(); // 21
+ * foo.getAge(); // 22
+ *
+ * @param {Object} origin
+ * @return {Object} Clone of origin
+ */
+oo.cloneObject = function ( origin ) {
+ var key, r;
+
+ r = Object.create( origin.constructor.prototype );
+
+ for ( key in origin ) {
+ if ( hasOwn.call( origin, key ) ) {
+ r[ key ] = origin[ key ];
+ }
+ }
+
+ return r;
+};
+
+/**
+ * Get an array of all property values in an object.
+ *
+ * @param {Object} obj Object to get values from
+ * @return {Array} List of object values
+ */
+oo.getObjectValues = function ( obj ) {
+ var key, values;
+
+ if ( obj !== Object( obj ) ) {
+ throw new TypeError( 'Called on non-object' );
+ }
+
+ values = [];
+ for ( key in obj ) {
+ if ( hasOwn.call( obj, key ) ) {
+ values[ values.length ] = obj[ key ];
+ }
+ }
+
+ return values;
+};
+
+/**
+ * Use binary search to locate an element in a sorted array.
+ *
+ * searchFunc is given an element from the array. `searchFunc(elem)` must return a number
+ * above 0 if the element we're searching for is to the right of (has a higher index than) elem,
+ * below 0 if it is to the left of elem, or zero if it's equal to elem.
+ *
+ * To search for a specific value with a comparator function (a `function cmp(a,b)` that returns
+ * above 0 if `a > b`, below 0 if `a < b`, and 0 if `a == b`), you can use
+ * `searchFunc = cmp.bind( null, value )`.
+ *
+ * @param {Array} arr Array to search in
+ * @param {Function} searchFunc Search function
+ * @param {boolean} [forInsertion] If not found, return index where val could be inserted
+ * @return {number|null} Index where val was found, or null if not found
+ */
+oo.binarySearch = function ( arr, searchFunc, forInsertion ) {
+ var mid, cmpResult,
+ left = 0,
+ right = arr.length;
+ while ( left < right ) {
+ // Equivalent to Math.floor( ( left + right ) / 2 ) but much faster
+ // eslint-disable-next-line no-bitwise
+ mid = ( left + right ) >> 1;
+ cmpResult = searchFunc( arr[ mid ] );
+ if ( cmpResult < 0 ) {
+ right = mid;
+ } else if ( cmpResult > 0 ) {
+ left = mid + 1;
+ } else {
+ return mid;
+ }
+ }
+ return forInsertion ? right : null;
+};
+
+/**
+ * Recursively compare properties between two objects.
+ *
+ * A false result may be caused by property inequality or by properties in one object missing from
+ * the other. An asymmetrical test may also be performed, which checks only that properties in the
+ * first object are present in the second object, but not the inverse.
+ *
+ * If either a or b is null or undefined it will be treated as an empty object.
+ *
+ * @param {Object|undefined|null} a First object to compare
+ * @param {Object|undefined|null} b Second object to compare
+ * @param {boolean} [asymmetrical] Whether to check only that a's values are equal to b's
+ * (i.e. a is a subset of b)
+ * @return {boolean} If the objects contain the same values as each other
+ */
+oo.compare = function ( a, b, asymmetrical ) {
+ var aValue, bValue, aType, bType, k;
+
+ if ( a === b ) {
+ return true;
+ }
+
+ a = a || {};
+ b = b || {};
+
+ if ( typeof a.nodeType === 'number' && typeof a.isEqualNode === 'function' ) {
+ return a.isEqualNode( b );
+ }
+
+ for ( k in a ) {
+ if ( !hasOwn.call( a, k ) || a[ k ] === undefined || a[ k ] === b[ k ] ) {
+ // Ignore undefined values, because there is no conceptual difference between
+ // a key that is absent and a key that is present but whose value is undefined.
+ continue;
+ }
+
+ aValue = a[ k ];
+ bValue = b[ k ];
+ aType = typeof aValue;
+ bType = typeof bValue;
+ if ( aType !== bType ||
+ (
+ ( aType === 'string' || aType === 'number' || aType === 'boolean' ) &&
+ aValue !== bValue
+ ) ||
+ ( aValue === Object( aValue ) && !oo.compare( aValue, bValue, true ) ) ) {
+ return false;
+ }
+ }
+ // If the check is not asymmetrical, recursing with the arguments swapped will verify our result
+ return asymmetrical ? true : oo.compare( b, a, true );
+};
+
+/**
+ * Create a plain deep copy of any kind of object.
+ *
+ * Copies are deep, and will either be an object or an array depending on `source`.
+ *
+ * @param {Object} source Object to copy
+ * @param {Function} [leafCallback] Applied to leaf values after they are cloned but before they are added to the clone
+ * @param {Function} [nodeCallback] Applied to all values before they are cloned. If the nodeCallback returns a value other than undefined, the returned value is used instead of attempting to clone.
+ * @return {Object} Copy of source object
+ */
+oo.copy = function ( source, leafCallback, nodeCallback ) {
+ var key, destination;
+
+ if ( nodeCallback ) {
+ // Extensibility: check before attempting to clone source.
+ destination = nodeCallback( source );
+ if ( destination !== undefined ) {
+ return destination;
+ }
+ }
+
+ if ( Array.isArray( source ) ) {
+ // Array (fall through)
+ destination = new Array( source.length );
+ } else if ( source && typeof source.clone === 'function' ) {
+ // Duck type object with custom clone method
+ return leafCallback ? leafCallback( source.clone() ) : source.clone();
+ } else if ( source && typeof source.cloneNode === 'function' ) {
+ // DOM Node
+ return leafCallback ?
+ leafCallback( source.cloneNode( true ) ) :
+ source.cloneNode( true );
+ } else if ( oo.isPlainObject( source ) ) {
+ // Plain objects (fall through)
+ destination = {};
+ } else {
+ // Non-plain objects (incl. functions) and primitive values
+ return leafCallback ? leafCallback( source ) : source;
+ }
+
+ // source is an array or a plain object
+ for ( key in source ) {
+ destination[ key ] = oo.copy( source[ key ], leafCallback, nodeCallback );
+ }
+
+ // This is an internal node, so we don't apply the leafCallback.
+ return destination;
+};
+
+/**
+ * Generate a hash of an object based on its name and data.
+ *
+ * Performance optimization: <http://jsperf.com/ve-gethash-201208#/toJson_fnReplacerIfAoForElse>
+ *
+ * To avoid two objects with the same values generating different hashes, we utilize the replacer
+ * argument of JSON.stringify and sort the object by key as it's being serialized. This may or may
+ * not be the fastest way to do this; we should investigate this further.
+ *
+ * Objects and arrays are hashed recursively. When hashing an object that has a .getHash()
+ * function, we call that function and use its return value rather than hashing the object
+ * ourselves. This allows classes to define custom hashing.
+ *
+ * @param {Object} val Object to generate hash for
+ * @return {string} Hash of object
+ */
+oo.getHash = function ( val ) {
+ return JSON.stringify( val, oo.getHash.keySortReplacer );
+};
+
+/**
+ * Sort objects by key (helper function for OO.getHash).
+ *
+ * This is a callback passed into JSON.stringify.
+ *
+ * @method getHash_keySortReplacer
+ * @param {string} key Property name of value being replaced
+ * @param {Mixed} val Property value to replace
+ * @return {Mixed} Replacement value
+ */
+oo.getHash.keySortReplacer = function ( key, val ) {
+ var normalized, keys, i, len;
+ if ( val && typeof val.getHashObject === 'function' ) {
+ // This object has its own custom hash function, use it
+ val = val.getHashObject();
+ }
+ if ( !Array.isArray( val ) && Object( val ) === val ) {
+ // Only normalize objects when the key-order is ambiguous
+ // (e.g. any object not an array).
+ normalized = {};
+ keys = Object.keys( val ).sort();
+ i = 0;
+ len = keys.length;
+ for ( ; i < len; i += 1 ) {
+ normalized[ keys[ i ] ] = val[ keys[ i ] ];
+ }
+ return normalized;
+ } else {
+ // Primitive values and arrays get stable hashes
+ // by default. Lets those be stringified as-is.
+ return val;
+ }
+};
+
+/**
+ * Get the unique values of an array, removing duplicates
+ *
+ * @param {Array} arr Array
+ * @return {Array} Unique values in array
+ */
+oo.unique = function ( arr ) {
+ return arr.reduce( function ( result, current ) {
+ if ( result.indexOf( current ) === -1 ) {
+ result.push( current );
+ }
+ return result;
+ }, [] );
+};
+
+/**
+ * Compute the union (duplicate-free merge) of a set of arrays.
+ *
+ * Arrays values must be convertable to object keys (strings).
+ *
+ * By building an object (with the values for keys) in parallel with
+ * the array, a new item's existence in the union can be computed faster.
+ *
+ * @param {...Array} arrays Arrays to union
+ * @return {Array} Union of the arrays
+ */
+oo.simpleArrayUnion = function () {
+ var i, ilen, arr, j, jlen,
+ obj = {},
+ result = [];
+
+ for ( i = 0, ilen = arguments.length; i < ilen; i++ ) {
+ arr = arguments[ i ];
+ for ( j = 0, jlen = arr.length; j < jlen; j++ ) {
+ if ( !obj[ arr[ j ] ] ) {
+ obj[ arr[ j ] ] = true;
+ result.push( arr[ j ] );
+ }
+ }
+ }
+
+ return result;
+};
+
+/**
+ * Combine arrays (intersection or difference).
+ *
+ * An intersection checks the item exists in 'b' while difference checks it doesn't.
+ *
+ * Arrays values must be convertable to object keys (strings).
+ *
+ * By building an object (with the values for keys) of 'b' we can
+ * compute the result faster.
+ *
+ * @private
+ * @param {Array} a First array
+ * @param {Array} b Second array
+ * @param {boolean} includeB Whether to items in 'b'
+ * @return {Array} Combination (intersection or difference) of arrays
+ */
+function simpleArrayCombine( a, b, includeB ) {
+ var i, ilen, isInB,
+ bObj = {},
+ result = [];
+
+ for ( i = 0, ilen = b.length; i < ilen; i++ ) {
+ bObj[ b[ i ] ] = true;
+ }
+
+ for ( i = 0, ilen = a.length; i < ilen; i++ ) {
+ isInB = !!bObj[ a[ i ] ];
+ if ( isInB === includeB ) {
+ result.push( a[ i ] );
+ }
+ }
+
+ return result;
+}
+
+/**
+ * Compute the intersection of two arrays (items in both arrays).
+ *
+ * Arrays values must be convertable to object keys (strings).
+ *
+ * @param {Array} a First array
+ * @param {Array} b Second array
+ * @return {Array} Intersection of arrays
+ */
+oo.simpleArrayIntersection = function ( a, b ) {
+ return simpleArrayCombine( a, b, true );
+};
+
+/**
+ * Compute the difference of two arrays (items in 'a' but not 'b').
+ *
+ * Arrays values must be convertable to object keys (strings).
+ *
+ * @param {Array} a First array
+ * @param {Array} b Second array
+ * @return {Array} Intersection of arrays
+ */
+oo.simpleArrayDifference = function ( a, b ) {
+ return simpleArrayCombine( a, b, false );
+};
+
+/* global $ */
+
+oo.isPlainObject = $.isPlainObject;
+
+/* global hasOwn */
+
+( function () {
+
+ /**
+ * @class OO.EventEmitter
+ *
+ * @constructor
+ */
+ oo.EventEmitter = function OoEventEmitter() {
+ // Properties
+
+ /**
+ * Storage of bound event handlers by event name.
+ *
+ * @property
+ */
+ this.bindings = {};
+ };
+
+ oo.initClass( oo.EventEmitter );
+
+ /* Private helper functions */
+
+ /**
+ * Validate a function or method call in a context
+ *
+ * For a method name, check that it names a function in the context object
+ *
+ * @private
+ * @param {Function|string} method Function or method name
+ * @param {Mixed} context The context of the call
+ * @throws {Error} A method name is given but there is no context
+ * @throws {Error} In the context object, no property exists with the given name
+ * @throws {Error} In the context object, the named property is not a function
+ */
+ function validateMethod( method, context ) {
+ // Validate method and context
+ if ( typeof method === 'string' ) {
+ // Validate method
+ if ( context === undefined || context === null ) {
+ throw new Error( 'Method name "' + method + '" has no context.' );
+ }
+ if ( typeof context[ method ] !== 'function' ) {
+ // Technically the property could be replaced by a function before
+ // call time. But this probably signals a typo.
+ throw new Error( 'Property "' + method + '" is not a function' );
+ }
+ } else if ( typeof method !== 'function' ) {
+ throw new Error( 'Invalid callback. Function or method name expected.' );
+ }
+ }
+
+ /**
+ * @private
+ * @param {OO.EventEmitter} eventEmitter Event emitter
+ * @param {string} event Event name
+ * @param {Object} binding
+ */
+ function addBinding( eventEmitter, event, binding ) {
+ var bindings;
+ // Auto-initialize bindings list
+ if ( hasOwn.call( eventEmitter.bindings, event ) ) {
+ bindings = eventEmitter.bindings[ event ];
+ } else {
+ bindings = eventEmitter.bindings[ event ] = [];
+ }
+ // Add binding
+ bindings.push( binding );
+ }
+
+ /* Methods */
+
+ /**
+ * Add a listener to events of a specific event.
+ *
+ * The listener can be a function or the string name of a method; if the latter, then the
+ * name lookup happens at the time the listener is called.
+ *
+ * @param {string} event Type of event to listen to
+ * @param {Function|string} method Function or method name to call when event occurs
+ * @param {Array} [args] Arguments to pass to listener, will be prepended to emitted arguments
+ * @param {Object} [context=null] Context object for function or method call
+ * @chainable
+ * @throws {Error} Listener argument is not a function or a valid method name
+ */
+ oo.EventEmitter.prototype.on = function ( event, method, args, context ) {
+ validateMethod( method, context );
+
+ // Ensure consistent object shape (optimisation)
+ addBinding( this, event, {
+ method: method,
+ args: args,
+ context: ( arguments.length < 4 ) ? null : context,
+ once: false
+ } );
+ return this;
+ };
+
+ /**
+ * Add a one-time listener to a specific event.
+ *
+ * @param {string} event Type of event to listen to
+ * @param {Function} listener Listener to call when event occurs
+ * @chainable
+ */
+ oo.EventEmitter.prototype.once = function ( event, listener ) {
+ validateMethod( listener );
+
+ // Ensure consistent object shape (optimisation)
+ addBinding( this, event, {
+ method: listener,
+ args: undefined,
+ context: null,
+ once: true
+ } );
+ return this;
+ };
+
+ /**
+ * Remove a specific listener from a specific event.
+ *
+ * @param {string} event Type of event to remove listener from
+ * @param {Function|string} [method] Listener to remove. Must be in the same form as was passed
+ * to "on". Omit to remove all listeners.
+ * @param {Object} [context=null] Context object function or method call
+ * @chainable
+ * @throws {Error} Listener argument is not a function or a valid method name
+ */
+ oo.EventEmitter.prototype.off = function ( event, method, context ) {
+ var i, bindings;
+
+ if ( arguments.length === 1 ) {
+ // Remove all bindings for event
+ delete this.bindings[ event ];
+ return this;
+ }
+
+ validateMethod( method, context );
+
+ if ( !hasOwn.call( this.bindings, event ) || !this.bindings[ event ].length ) {
+ // No matching bindings
+ return this;
+ }
+
+ // Default to null context
+ if ( arguments.length < 3 ) {
+ context = null;
+ }
+
+ // Remove matching handlers
+ bindings = this.bindings[ event ];
+ i = bindings.length;
+ while ( i-- ) {
+ if ( bindings[ i ].method === method && bindings[ i ].context === context ) {
+ bindings.splice( i, 1 );
+ }
+ }
+
+ // Cleanup if now empty
+ if ( bindings.length === 0 ) {
+ delete this.bindings[ event ];
+ }
+ return this;
+ };
+
+ /**
+ * Emit an event.
+ *
+ * @param {string} event Type of event
+ * @param {...Mixed} args First in a list of variadic arguments passed to event handler (optional)
+ * @return {boolean} Whether the event was handled by at least one listener
+ */
+ oo.EventEmitter.prototype.emit = function ( event ) {
+ var args = [],
+ i, len, binding, bindings, method;
+
+ if ( hasOwn.call( this.bindings, event ) ) {
+ // Slicing ensures that we don't get tripped up by event handlers that add/remove bindings
+ bindings = this.bindings[ event ].slice();
+ for ( i = 1, len = arguments.length; i < len; i++ ) {
+ args.push( arguments[ i ] );
+ }
+ for ( i = 0, len = bindings.length; i < len; i++ ) {
+ binding = bindings[ i ];
+ if ( typeof binding.method === 'string' ) {
+ // Lookup method by name (late binding)
+ method = binding.context[ binding.method ];
+ } else {
+ method = binding.method;
+ }
+ if ( binding.once ) {
+ // Must unbind before calling method to avoid
+ // any nested triggers.
+ this.off( event, method );
+ }
+ method.apply(
+ binding.context,
+ binding.args ? binding.args.concat( args ) : args
+ );
+ }
+ return true;
+ }
+ return false;
+ };
+
+ /**
+ * Connect event handlers to an object.
+ *
+ * @param {Object} context Object to call methods on when events occur
+ * @param {Object.<string,string>|Object.<string,Function>|Object.<string,Array>} methods List of
+ * event bindings keyed by event name containing either method names, functions or arrays containing
+ * method name or function followed by a list of arguments to be passed to callback before emitted
+ * arguments.
+ * @chainable
+ */
+ oo.EventEmitter.prototype.connect = function ( context, methods ) {
+ var method, args, event;
+
+ for ( event in methods ) {
+ method = methods[ event ];
+ // Allow providing additional args
+ if ( Array.isArray( method ) ) {
+ args = method.slice( 1 );
+ method = method[ 0 ];
+ } else {
+ args = [];
+ }
+ // Add binding
+ this.on( event, method, args, context );
+ }
+ return this;
+ };
+
+ /**
+ * Disconnect event handlers from an object.
+ *
+ * @param {Object} context Object to disconnect methods from
+ * @param {Object.<string,string>|Object.<string,Function>|Object.<string,Array>} [methods] List of
+ * event bindings keyed by event name. Values can be either method names, functions or arrays
+ * containing a method name.
+ * NOTE: To allow matching call sites with connect(), array values are allowed to contain the
+ * parameters as well, but only the method name is used to find bindings. Tt is discouraged to
+ * have multiple bindings for the same event to the same listener, but if used (and only the
+ * parameters vary), disconnecting one variation of (event name, event listener, parameters)
+ * will disconnect other variations as well.
+ * @chainable
+ */
+ oo.EventEmitter.prototype.disconnect = function ( context, methods ) {
+ var i, event, method, bindings;
+
+ if ( methods ) {
+ // Remove specific connections to the context
+ for ( event in methods ) {
+ method = methods[ event ];
+ if ( Array.isArray( method ) ) {
+ method = method[ 0 ];
+ }
+ this.off( event, method, context );
+ }
+ } else {
+ // Remove all connections to the context
+ for ( event in this.bindings ) {
+ bindings = this.bindings[ event ];
+ i = bindings.length;
+ while ( i-- ) {
+ // bindings[i] may have been removed by the previous step's
+ // this.off so check it still exists
+ if ( bindings[ i ] && bindings[ i ].context === context ) {
+ this.off( event, bindings[ i ].method, context );
+ }
+ }
+ }
+ }
+
+ return this;
+ };
+
+}() );
+
+( function () {
+
+ /**
+ * Contain and manage a list of OO.EventEmitter items.
+ *
+ * Aggregates and manages their events collectively.
+ *
+ * This mixin must be used in a class that also mixes in OO.EventEmitter.
+ *
+ * @abstract
+ * @class OO.EmitterList
+ * @constructor
+ */
+ oo.EmitterList = function OoEmitterList() {
+ this.items = [];
+ this.aggregateItemEvents = {};
+ };
+
+ /* Events */
+
+ /**
+ * Item has been added
+ *
+ * @event add
+ * @param {OO.EventEmitter} item Added item
+ * @param {number} index Index items were added at
+ */
+
+ /**
+ * Item has been moved to a new index
+ *
+ * @event move
+ * @param {OO.EventEmitter} item Moved item
+ * @param {number} index Index item was moved to
+ * @param {number} oldIndex The original index the item was in
+ */
+
+ /**
+ * Item has been removed
+ *
+ * @event remove
+ * @param {OO.EventEmitter} item Removed item
+ * @param {number} index Index the item was removed from
+ */
+
+ /**
+ * @event clear The list has been cleared of items
+ */
+
+ /* Methods */
+
+ /**
+ * Normalize requested index to fit into the bounds of the given array.
+ *
+ * @private
+ * @static
+ * @param {Array} arr Given array
+ * @param {number|undefined} index Requested index
+ * @return {number} Normalized index
+ */
+ function normalizeArrayIndex( arr, index ) {
+ return ( index === undefined || index < 0 || index >= arr.length ) ?
+ arr.length :
+ index;
+ }
+
+ /**
+ * Get all items.
+ *
+ * @return {OO.EventEmitter[]} Items in the list
+ */
+ oo.EmitterList.prototype.getItems = function () {
+ return this.items.slice( 0 );
+ };
+
+ /**
+ * Get the index of a specific item.
+ *
+ * @param {OO.EventEmitter} item Requested item
+ * @return {number} Index of the item
+ */
+ oo.EmitterList.prototype.getItemIndex = function ( item ) {
+ return this.items.indexOf( item );
+ };
+
+ /**
+ * Get number of items.
+ *
+ * @return {number} Number of items in the list
+ */
+ oo.EmitterList.prototype.getItemCount = function () {
+ return this.items.length;
+ };
+
+ /**
+ * Check if a list contains no items.
+ *
+ * @return {boolean} Group is empty
+ */
+ oo.EmitterList.prototype.isEmpty = function () {
+ return !this.items.length;
+ };
+
+ /**
+ * Aggregate the events emitted by the group.
+ *
+ * When events are aggregated, the group will listen to all contained items for the event,
+ * and then emit the event under a new name. The new event will contain an additional leading
+ * parameter containing the item that emitted the original event. Other arguments emitted from
+ * the original event are passed through.
+ *
+ * @param {Object.<string,string|null>} events An object keyed by the name of the event that should be
+ * aggregated (e.g., ‘click’) and the value of the new name to use (e.g., ‘groupClick’).
+ * A `null` value will remove aggregated events.
+
+ * @throws {Error} If aggregation already exists
+ */
+ oo.EmitterList.prototype.aggregate = function ( events ) {
+ var i, item, add, remove, itemEvent, groupEvent;
+
+ for ( itemEvent in events ) {
+ groupEvent = events[ itemEvent ];
+
+ // Remove existing aggregated event
+ if ( Object.prototype.hasOwnProperty.call( this.aggregateItemEvents, itemEvent ) ) {
+ // Don't allow duplicate aggregations
+ if ( groupEvent ) {
+ throw new Error( 'Duplicate item event aggregation for ' + itemEvent );
+ }
+ // Remove event aggregation from existing items
+ for ( i = 0; i < this.items.length; i++ ) {
+ item = this.items[ i ];
+ if ( item.connect && item.disconnect ) {
+ remove = {};
+ remove[ itemEvent ] = [ 'emit', this.aggregateItemEvents[ itemEvent ], item ];
+ item.disconnect( this, remove );
+ }
+ }
+ // Prevent future items from aggregating event
+ delete this.aggregateItemEvents[ itemEvent ];
+ }
+
+ // Add new aggregate event
+ if ( groupEvent ) {
+ // Make future items aggregate event
+ this.aggregateItemEvents[ itemEvent ] = groupEvent;
+ // Add event aggregation to existing items
+ for ( i = 0; i < this.items.length; i++ ) {
+ item = this.items[ i ];
+ if ( item.connect && item.disconnect ) {
+ add = {};
+ add[ itemEvent ] = [ 'emit', groupEvent, item ];
+ item.connect( this, add );
+ }
+ }
+ }
+ }
+ };
+
+ /**
+ * Add items to the list.
+ *
+ * @param {OO.EventEmitter|OO.EventEmitter[]} items Item to add or
+ * an array of items to add
+ * @param {number} [index] Index to add items at. If no index is
+ * given, or if the index that is given is invalid, the item
+ * will be added at the end of the list.
+ * @chainable
+ * @fires add
+ * @fires move
+ */
+ oo.EmitterList.prototype.addItems = function ( items, index ) {
+ var i, oldIndex;
+
+ if ( !Array.isArray( items ) ) {
+ items = [ items ];
+ }
+
+ if ( items.length === 0 ) {
+ return this;
+ }
+
+ index = normalizeArrayIndex( this.items, index );
+ for ( i = 0; i < items.length; i++ ) {
+ oldIndex = this.items.indexOf( items[ i ] );
+ if ( oldIndex !== -1 ) {
+ // Move item to new index
+ index = this.moveItem( items[ i ], index );
+ this.emit( 'move', items[ i ], index, oldIndex );
+ } else {
+ // insert item at index
+ index = this.insertItem( items[ i ], index );
+ this.emit( 'add', items[ i ], index );
+ }
+ index++;
+ }
+
+ return this;
+ };
+
+ /**
+ * Move an item from its current position to a new index.
+ *
+ * The item is expected to exist in the list. If it doesn't,
+ * the method will throw an exception.
+ *
+ * @private
+ * @param {OO.EventEmitter} item Items to add
+ * @param {number} newIndex Index to move the item to
+ * @return {number} The index the item was moved to
+ * @throws {Error} If item is not in the list
+ */
+ oo.EmitterList.prototype.moveItem = function ( item, newIndex ) {
+ var existingIndex = this.items.indexOf( item );
+
+ if ( existingIndex === -1 ) {
+ throw new Error( 'Item cannot be moved, because it is not in the list.' );
+ }
+
+ newIndex = normalizeArrayIndex( this.items, newIndex );
+
+ // Remove the item from the current index
+ this.items.splice( existingIndex, 1 );
+
+ // If necessary, adjust new index after removal
+ if ( existingIndex < newIndex ) {
+ newIndex--;
+ }
+
+ // Move the item to the new index
+ this.items.splice( newIndex, 0, item );
+
+ return newIndex;
+ };
+
+ /**
+ * Utility method to insert an item into the list, and
+ * connect it to aggregate events.
+ *
+ * Don't call this directly unless you know what you're doing.
+ * Use #addItems instead.
+ *
+ * This method can be extended in child classes to produce
+ * different behavior when an item is inserted. For example,
+ * inserted items may also be attached to the DOM or may
+ * interact with some other nodes in certain ways. Extending
+ * this method is allowed, but if overriden, the aggregation
+ * of events must be preserved, or behavior of emitted events
+ * will be broken.
+ *
+ * If you are extending this method, please make sure the
+ * parent method is called.
+ *
+ * @protected
+ * @param {OO.EventEmitter} item Items to add
+ * @param {number} index Index to add items at
+ * @return {number} The index the item was added at
+ */
+ oo.EmitterList.prototype.insertItem = function ( item, index ) {
+ var events, event;
+
+ // Add the item to event aggregation
+ if ( item.connect && item.disconnect ) {
+ events = {};
+ for ( event in this.aggregateItemEvents ) {
+ events[ event ] = [ 'emit', this.aggregateItemEvents[ event ], item ];
+ }
+ item.connect( this, events );
+ }
+
+ index = normalizeArrayIndex( this.items, index );
+
+ // Insert into items array
+ this.items.splice( index, 0, item );
+ return index;
+ };
+
+ /**
+ * Remove items.
+ *
+ * @param {OO.EventEmitter[]} items Items to remove
+ * @chainable
+ * @fires remove
+ */
+ oo.EmitterList.prototype.removeItems = function ( items ) {
+ var i, item, index;
+
+ if ( !Array.isArray( items ) ) {
+ items = [ items ];
+ }
+
+ if ( items.length === 0 ) {
+ return this;
+ }
+
+ // Remove specific items
+ for ( i = 0; i < items.length; i++ ) {
+ item = items[ i ];
+ index = this.items.indexOf( item );
+ if ( index !== -1 ) {
+ if ( item.connect && item.disconnect ) {
+ // Disconnect all listeners from the item
+ item.disconnect( this );
+ }
+ this.items.splice( index, 1 );
+ this.emit( 'remove', item, index );
+ }
+ }
+
+ return this;
+ };
+
+ /**
+ * Clear all items
+ *
+ * @chainable
+ * @fires clear
+ */
+ oo.EmitterList.prototype.clearItems = function () {
+ var i, item,
+ cleared = this.items.splice( 0, this.items.length );
+
+ // Disconnect all items
+ for ( i = 0; i < cleared.length; i++ ) {
+ item = cleared[ i ];
+ if ( item.connect && item.disconnect ) {
+ item.disconnect( this );
+ }
+ }
+
+ this.emit( 'clear' );
+
+ return this;
+ };
+
+}() );
+
+/**
+ * Manage a sorted list of OO.EmitterList objects.
+ *
+ * The sort order is based on a callback that compares two items. The return value of
+ * callback( a, b ) must be less than zero if a < b, greater than zero if a > b, and zero
+ * if a is equal to b. The callback should only return zero if the two objects are
+ * considered equal.
+ *
+ * When an item changes in a way that could affect their sorting behavior, it must
+ * emit the itemSortChange event. This will cause it to be re-sorted automatically.
+ *
+ * This mixin must be used in a class that also mixes in OO.EventEmitter.
+ *
+ * @abstract
+ * @class OO.SortedEmitterList
+ * @mixins OO.EmitterList
+ * @constructor
+ * @param {Function} sortingCallback Callback that compares two items.
+ */
+oo.SortedEmitterList = function OoSortedEmitterList( sortingCallback ) {
+ // Mixin constructors
+ oo.EmitterList.call( this );
+
+ this.sortingCallback = sortingCallback;
+
+ // Listen to sortChange event and make sure
+ // we re-sort the changed item when that happens
+ this.aggregate( {
+ sortChange: 'itemSortChange'
+ } );
+
+ this.connect( this, {
+ itemSortChange: 'onItemSortChange'
+ } );
+};
+
+oo.mixinClass( oo.SortedEmitterList, oo.EmitterList );
+
+/* Events */
+
+/**
+ * An item has changed properties that affect its sort positioning
+ * inside the list.
+ *
+ * @private
+ * @event itemSortChange
+ */
+
+/* Methods */
+
+/**
+ * Handle a case where an item changed a property that relates
+ * to its sorted order
+ *
+ * @param {OO.EventEmitter} item Item in the list
+ */
+oo.SortedEmitterList.prototype.onItemSortChange = function ( item ) {
+ // Remove the item
+ this.removeItems( item );
+ // Re-add the item so it is in the correct place
+ this.addItems( item );
+};
+
+/**
+ * Change the sorting callback for this sorted list.
+ *
+ * The callback receives two items. The return value of callback(a, b) must be less than zero
+ * if a < b, greater than zero if a > b, and zero if a is equal to b.
+ *
+ * @param {Function} sortingCallback Sorting callback
+ */
+oo.SortedEmitterList.prototype.setSortingCallback = function ( sortingCallback ) {
+ var items = this.getItems();
+
+ this.sortingCallback = sortingCallback;
+
+ // Empty the list
+ this.clearItems();
+ // Re-add the items in the new order
+ this.addItems( items );
+};
+
+/**
+ * Add items to the sorted list.
+ *
+ * @param {OO.EventEmitter|OO.EventEmitter[]} items Item to add or
+ * an array of items to add
+ * @chainable
+ */
+oo.SortedEmitterList.prototype.addItems = function ( items ) {
+ var index, i, insertionIndex;
+
+ if ( !Array.isArray( items ) ) {
+ items = [ items ];
+ }
+
+ if ( items.length === 0 ) {
+ return this;
+ }
+
+ for ( i = 0; i < items.length; i++ ) {
+ // Find insertion index
+ insertionIndex = this.findInsertionIndex( items[ i ] );
+
+ // Check if the item exists using the sorting callback
+ // and remove it first if it exists
+ if (
+ // First make sure the insertion index is not at the end
+ // of the list (which means it does not point to any actual
+ // items)
+ insertionIndex <= this.items.length &&
+ // Make sure there actually is an item in this index
+ this.items[ insertionIndex ] &&
+ // The callback returns 0 if the items are equal
+ this.sortingCallback( this.items[ insertionIndex ], items[ i ] ) === 0
+ ) {
+ // Remove the existing item
+ this.removeItems( this.items[ insertionIndex ] );
+ }
+
+ // Insert item at the insertion index
+ index = this.insertItem( items[ i ], insertionIndex );
+ this.emit( 'add', items[ i ], index );
+ }
+
+ return this;
+};
+
+/**
+ * Find the index a given item should be inserted at. If the item is already
+ * in the list, this will return the index where the item currently is.
+ *
+ * @param {OO.EventEmitter} item Items to insert
+ * @return {number} The index the item should be inserted at
+ */
+oo.SortedEmitterList.prototype.findInsertionIndex = function ( item ) {
+ var list = this;
+
+ return oo.binarySearch(
+ this.items,
+ // Fake a this.sortingCallback.bind( null, item ) call here
+ // otherwise this doesn't pass tests in phantomJS
+ function ( otherItem ) {
+ return list.sortingCallback( item, otherItem );
+ },
+ true
+ );
+
+};
+
+/* global hasOwn */
+
+/**
+ * A map interface for associating arbitrary data with a symbolic name. Used in
+ * place of a plain object to provide additional {@link #method-register registration}
+ * or {@link #method-lookup lookup} functionality.
+ *
+ * See <https://www.mediawiki.org/wiki/OOjs/Registries_and_factories>.
+ *
+ * @class OO.Registry
+ * @mixins OO.EventEmitter
+ *
+ * @constructor
+ */
+oo.Registry = function OoRegistry() {
+ // Mixin constructors
+ oo.EventEmitter.call( this );
+
+ // Properties
+ this.registry = {};
+};
+
+/* Inheritance */
+
+oo.mixinClass( oo.Registry, oo.EventEmitter );
+
+/* Events */
+
+/**
+ * @event register
+ * @param {string} name
+ * @param {Mixed} data
+ */
+
+/**
+ * @event unregister
+ * @param {string} name
+ * @param {Mixed} data Data removed from registry
+ */
+
+/* Methods */
+
+/**
+ * Associate one or more symbolic names with some data.
+ *
+ * Any existing entry with the same name will be overridden.
+ *
+ * @param {string|string[]} name Symbolic name or list of symbolic names
+ * @param {Mixed} data Data to associate with symbolic name
+ * @fires register
+ * @throws {Error} Name argument must be a string or array
+ */
+oo.Registry.prototype.register = function ( name, data ) {
+ var i, len;
+ if ( typeof name === 'string' ) {
+ this.registry[ name ] = data;
+ this.emit( 'register', name, data );
+ } else if ( Array.isArray( name ) ) {
+ for ( i = 0, len = name.length; i < len; i++ ) {
+ this.register( name[ i ], data );
+ }
+ } else {
+ throw new Error( 'Name must be a string or array, cannot be a ' + typeof name );
+ }
+};
+
+/**
+ * Remove one or more symbolic names from the registry
+ *
+ * @param {string|string[]} name Symbolic name or list of symbolic names
+ * @fires unregister
+ * @throws {Error} Name argument must be a string or array
+ */
+oo.Registry.prototype.unregister = function ( name ) {
+ var i, len, data;
+ if ( typeof name === 'string' ) {
+ data = this.lookup( name );
+ if ( data !== undefined ) {
+ delete this.registry[ name ];
+ this.emit( 'unregister', name, data );
+ }
+ } else if ( Array.isArray( name ) ) {
+ for ( i = 0, len = name.length; i < len; i++ ) {
+ this.unregister( name[ i ] );
+ }
+ } else {
+ throw new Error( 'Name must be a string or array, cannot be a ' + typeof name );
+ }
+};
+
+/**
+ * Get data for a given symbolic name.
+ *
+ * @param {string} name Symbolic name
+ * @return {Mixed|undefined} Data associated with symbolic name
+ */
+oo.Registry.prototype.lookup = function ( name ) {
+ if ( hasOwn.call( this.registry, name ) ) {
+ return this.registry[ name ];
+ }
+};
+
+/**
+ * @class OO.Factory
+ * @extends OO.Registry
+ *
+ * @constructor
+ */
+oo.Factory = function OoFactory() {
+ // Parent constructor
+ oo.Factory.super.call( this );
+};
+
+/* Inheritance */
+
+oo.inheritClass( oo.Factory, oo.Registry );
+
+/* Methods */
+
+/**
+ * Register a constructor with the factory.
+ *
+ * Classes must have a static `name` property to be registered.
+ *
+ * function MyClass() {};
+ * OO.initClass( MyClass );
+ * // Adds a static property to the class defining a symbolic name
+ * MyClass.static.name = 'mine';
+ * // Registers class with factory, available via symbolic name 'mine'
+ * factory.register( MyClass );
+ *
+ * @param {Function} constructor Constructor to use when creating object
+ * @throws {Error} Name must be a string and must not be empty
+ * @throws {Error} Constructor must be a function
+ */
+oo.Factory.prototype.register = function ( constructor ) {
+ var name;
+
+ if ( typeof constructor !== 'function' ) {
+ throw new Error( 'constructor must be a function, cannot be a ' + typeof constructor );
+ }
+ name = constructor.static && constructor.static.name;
+ if ( typeof name !== 'string' || name === '' ) {
+ throw new Error( 'Name must be a string and must not be empty' );
+ }
+
+ // Parent method
+ oo.Factory.super.prototype.register.call( this, name, constructor );
+};
+
+/**
+ * Unregister a constructor from the factory.
+ *
+ * @param {Function} constructor Constructor to unregister
+ * @throws {Error} Name must be a string and must not be empty
+ * @throws {Error} Constructor must be a function
+ */
+oo.Factory.prototype.unregister = function ( constructor ) {
+ var name;
+
+ if ( typeof constructor !== 'function' ) {
+ throw new Error( 'constructor must be a function, cannot be a ' + typeof constructor );
+ }
+ name = constructor.static && constructor.static.name;
+ if ( typeof name !== 'string' || name === '' ) {
+ throw new Error( 'Name must be a string and must not be empty' );
+ }
+
+ // Parent method
+ oo.Factory.super.prototype.unregister.call( this, name );
+};
+
+/**
+ * Create an object based on a name.
+ *
+ * Name is used to look up the constructor to use, while all additional arguments are passed to the
+ * constructor directly, so leaving one out will pass an undefined to the constructor.
+ *
+ * @param {string} name Object name
+ * @param {...Mixed} [args] Arguments to pass to the constructor
+ * @return {Object} The new object
+ * @throws {Error} Unknown object name
+ */
+oo.Factory.prototype.create = function ( name ) {
+ var obj, i,
+ args = [],
+ constructor = this.lookup( name );
+
+ if ( !constructor ) {
+ throw new Error( 'No class registered by that name: ' + name );
+ }
+
+ // Convert arguments to array and shift the first argument (name) off
+ for ( i = 1; i < arguments.length; i++ ) {
+ args.push( arguments[ i ] );
+ }
+
+ // We can't use the "new" operator with .apply directly because apply needs a
+ // context. So instead just do what "new" does: create an object that inherits from
+ // the constructor's prototype (which also makes it an "instanceof" the constructor),
+ // then invoke the constructor with the object as context, and return it (ignoring
+ // the constructor's return value).
+ obj = Object.create( constructor.prototype );
+ constructor.apply( obj, args );
+ return obj;
+};
+
+/* eslint-env node */
+
+/* istanbul ignore next */
+if ( typeof module !== 'undefined' && module.exports ) {
+ module.exports = oo;
+} else {
+ global.OO = oo;
+}
+
+}( this ) );
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-05 06:56:57 +0000