mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 18:39:52 +00:00
637 lines
18 KiB
JavaScript
637 lines
18 KiB
JavaScript
/**
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* VisualEditor namespace.
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*
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* @copyright 2011-2012 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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( function () {
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var ve, hasOwn;
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/**
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* Namespace for all VisualEditor classes, static methods and static properties.
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*/
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ve = {
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// List of instances of ve.Surface
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'instances': []
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};
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/* Utility Functions */
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hasOwn = Object.prototype.hasOwnProperty;
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/* Static Methods */
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/**
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* Create an object that inherits from another object.
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*
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* @static
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* @method
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* @until ES5: Object.create.
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* @source https://github.com/Krinkle/K-js.
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* @param {Object} origin Object to inherit from.
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* @return {Object} Empty object that inherits from origin.
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*/
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ve.createObject = Object.hasOwnProperty( 'create' ) ? Object.create : function ( origin ) {
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function O() {}
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O.prototype = origin;
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var r = new O();
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return r;
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};
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/**
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* Utility for common usage of ve.createObject for inheriting from one
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* prototype to another.
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*
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* Beware: This redefines the prototype, call before setting your prototypes.
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* Beware: This redefines the prototype, can only be called once on a function.
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* If called multiple times on the same function, the previous prototype is lost.
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* This is how prototypal inheritance works, it can only be one straight chain
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* (just like classical inheritance in PHP for example). If you need to work with
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* multiple constructors consider storing an instance of the other constructor in a
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* property instead, or perhaps use a mixin (see ve.mixinClass).
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*
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* @example
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* <code>
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* function Foo() {}
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* Foo.prototype.jump = function () {};
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*
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* function FooBar() {}
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* ve.inheritClass( FooBar, Foo );
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* FooBar.prototype.walk = function () {};
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*
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* var fb = new FooBar();
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* fb.jump();
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* fb.walk();
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* fb instanceof Foo && fb instanceof FooBar;
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* </code>
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*
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* @static
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* @method
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* @source https://github.com/Krinkle/K-js.
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* @param {Function} targetFn
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* @param {Function} originFn
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*/
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ve.inheritClass = function ( targetFn, originFn ) {
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var tmp = targetFn.prototype.constructor;
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targetFn.prototype = ve.createObject( originFn.prototype );
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// Restore original constructor property
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targetFn.prototype.constructor = tmp;
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};
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/**
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* Utility to copy over *own* prototype properties of a mixin.
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* The 'constructor' (whether implicit or explicit) is not copied over.
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*
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* This does not create inheritance to the origin. If inheritance is needed
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* use ve.inheritClass instead.
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*
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* Beware: This can redefine a prototype property, call before setting your prototypes.
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* Beware: Don't call before ve.inheritClass.
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*
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* @example
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* <code>
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* function Foo() {}
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* function Context() {}
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*
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* // Avoid repeating this code
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* function ContextLazyLoad() {}
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* ContextLazyLoad.prototype.getContext = function () {
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* if ( !this.context ) {
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* this.context = new Context();
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* }
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* return this.context;
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* };
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*
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* function FooBar() {}
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* ve.inheritClass( FooBar, Foo );
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* ve.mixinClass( FooBar, ContextLazyLoad );
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* </code>
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*
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* @static
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* @method
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* @source https://github.com/Krinkle/K-js.
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* @param {Function} targetFn
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* @param {Function} originFn
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*/
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ve.mixinClass = function ( targetFn, originFn ) {
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for ( var key in originFn.prototype ) {
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if ( key !== 'constructor' && hasOwn.call( originFn.prototype, key ) ) {
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targetFn.prototype[key] = originFn.prototype[key];
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}
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}
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};
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/**
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* Create a new object that is an instance of the same
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* constructor as the input, inherits from the same object
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* and contains the same own properties.
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*
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* This makes a shallow non-recursive copy of own properties.
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* To create a recursive copy of plain objects, use ve.copyObject.
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*
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* @example
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* <code>
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* var foo = new Person( mom, dad );
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* foo.setAge( 21 );
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* var foo2 = ve.cloneObject( foo );
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* foo.setAge( 22 );
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* // Then
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* foo2 !== foo; // true
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* foo2 instanceof Person; // true
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* foo2.getAge(); // 21
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* foo.getAge(); // 22
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* </code>
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*
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* @static
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* @method
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* @source https://github.com/Krinkle/K-js.
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* @param {Object} origin
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* @return {Object} Clone of origin.
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*/
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ve.cloneObject = function ( origin ) {
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var key, r;
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r = ve.createObject( origin.constructor.prototype );
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for ( key in origin ) {
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if ( hasOwn.call( origin, key ) ) {
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r[key] = origin[key];
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}
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}
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return r;
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};
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ve.isPlainObject = $.isPlainObject;
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ve.isEmptyObject = $.isEmptyObject;
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/**
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* Check whether given variable is an array. Should not use `instanceof` or
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* `constructor` due to the inability to detect arrays from a different
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* scope.
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* @static
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* @method
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* @until ES5: Array.isArray.
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* @param {Mixed} x
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* @return {Boolean}
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*/
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ve.isArray = $.isArray;
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/**
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* Create a function calls the given function in a certain context.
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* If a function does not have an explicit context, it is determined at
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* executin time based on how it is invoked (e.g. object member, call/apply,
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* global scope, etc.).
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* Performance optimization: http://jsperf.com/function-bind-shim-perf
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*
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* @static
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* @method
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* @until ES5: Function.prototype.bind.
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* @param {Function} func Function to bind.
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* @param {Object} context Context for the function.
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* @param {Mixed} [..] Variadic list of arguments to prepend to arguments
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* to the bound function.
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* @return {Function} The bound.
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*/
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ve.bind = $.proxy;
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/**
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* Wrapper for Array.prototype.indexOf.
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*
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* @static
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* @method
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* @until ES5
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* @param {Mixed} value Element to search for.
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* @param {Array} array Array to search in.
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* @param {Number} [fromIndex=0] Index to being searching from.
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* @return {Number} Index of value in array, or -1 if not found.
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* Values are compared without type coersion.
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*/
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ve.indexOf = $.inArray;
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/**
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* Merge properties of one or more objects into another.
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* Preserves original object's inheritance (e.g. Array, Object, whatever).
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* In case of array or array-like objects only the indexed properties
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* are copied over.
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* Beware: If called with only one argument, it will consider
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* 'target' as 'source' and 'this' as 'target'. Which means
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* ve.extendObject( { a: 1 } ); sets ve.a = 1;
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*
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* @static
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* @method
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* @param {Boolean} [recursive=false]
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* @param {Mixed} target Object that will receive the new properties.
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* @param {Mixed} [..] Variadic list of objects containing properties
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* to be merged into the targe.
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* @return {Mixed} Modified version of first or second argument.
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*/
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ve.extendObject = $.extend;
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/**
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* Generates a hash of an object based on its name and data.
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* Performance optimization: http://jsperf.com/ve-gethash-201208#/toJson_fnReplacerIfAoForElse
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*
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* To avoid two objects with the same values generating different hashes, we utilize the replacer
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* argument of JSON.stringify and sort the object by key as it's being serialized. This may or may
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* not be the fastest way to do this; we should investigate this further.
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*
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* @static
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* @method
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* @param {Object} val Object to generate hash for
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* @returns {String} Hash of object
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*/
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ve.getHash = function ( val ) {
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return JSON.stringify( val, ve.getHash.keySortReplacer );
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};
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/**
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* Helper function for ve.getHash which sorts objects by key.
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*
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* This is a callback passed into JSON.stringify.
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*
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* @static
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* @method
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* @param {String} key Property name of value being replaced
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* @param {Mixed} val Property value to replace
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* @returns {Mixed} Replacement value
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*/
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ve.getHash.keySortReplacer = function ( key, val ) {
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var normalized, keys, i, len;
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// Only normalize objects when the key-order is ambiguous
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// (e.g. any object not an array).
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if ( !ve.isArray( val ) && Object( val ) === val ) {
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normalized = {};
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keys = ve.getObjectKeys( val ).sort();
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i = 0;
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len = keys.length;
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for ( ; i < len; i += 1 ) {
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normalized[keys[i]] = val[keys[i]];
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}
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return normalized;
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// Primitive values and arrays get stable hashes
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// by default. Lets those be stringified as-is.
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} else {
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return val;
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}
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};
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/**
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* Gets an array of all property names in an object.
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*
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* This falls back to the native impelentation of Object.keys if available.
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* Performance optimization: http://jsperf.com/object-keys-shim-perf#/fnHasown_fnForIfcallLength
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*
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* @static
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* @method
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* @until ES5
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* @param {Object} Object to get properties from
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* @returns {String[]} List of object keys
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*/
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ve.getObjectKeys = Object.hasOwnProperty( 'keys' ) ? Object.keys : function ( obj ) {
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var key, keys;
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if ( Object( obj ) !== obj ) {
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throw new TypeError( 'Called on non-object' );
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}
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keys = [];
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for ( key in obj ) {
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if ( hasOwn.call( obj, key ) ) {
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keys[keys.length] = key;
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}
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}
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return keys;
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};
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/**
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* Gets an array of all property values in an object.
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*
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* @static
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* @method
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* @param {Object} Object to get values from
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* @returns {Array} List of object values
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*/
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ve.getObjectValues = function ( obj ) {
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var key, values;
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if ( Object( obj ) !== obj ) {
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throw new TypeError( 'Called on non-object' );
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}
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values = [];
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for ( key in obj ) {
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if ( hasOwn.call( obj, key ) ) {
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values[values.length] = obj[key];
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}
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}
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return values;
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};
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/**
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* Recursively compares string and number property between two objects.
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*
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* A false result may be caused by property inequality or by properties in one object missing from
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* the other. An asymmetrical test may also be performed, which checks only that properties in the
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* first object are present in the second object, but not the inverse.
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*
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* @static
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* @method
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* @param {Object} a First object to compare
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* @param {Object} b Second object to compare
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* @param {Boolean} [asymmetrical] Whether to check only that b contains values from a
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* @returns {Boolean} If the objects contain the same values as each other
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*/
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ve.compareObjects = function ( a, b, asymmetrical ) {
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var aValue, bValue, aType, bType, k;
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for ( k in a ) {
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aValue = a[k];
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bValue = b[k];
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aType = typeof aValue;
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bType = typeof bValue;
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if ( aType !== bType ||
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( ( aType === 'string' || aType === 'number' ) && aValue !== bValue ) ||
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( ve.isPlainObject( aValue ) && !ve.compareObjects( aValue, bValue ) ) ) {
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return false;
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}
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}
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// If the check is not asymmetrical, recursing with the arguments swapped will verify our result
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return asymmetrical ? true : ve.compareObjects( b, a, true );
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};
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/**
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* Recursively compare two arrays.
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*
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* @static
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* @method
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* @param {Array} a First array to compare
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* @param {Array} b Second array to compare
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* @param {Boolean} [objectsByValue] Use ve.compareObjects() to compare objects instead of ===
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*/
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ve.compareArrays = function ( a, b, objectsByValue ) {
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var i,
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aValue,
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bValue,
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aType,
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bType;
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if ( a.length !== b.length ) {
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return false;
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}
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for ( i = 0; i < a.length; i++ ) {
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aValue = a[i];
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bValue = b[i];
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aType = typeof aValue;
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bType = typeof bValue;
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if (
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aType !== bType ||
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!(
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(
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ve.isArray( aValue ) &&
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ve.isArray( bValue ) &&
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ve.compareArrays( aValue, bValue )
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) ||
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(
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objectsByValue &&
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ve.isPlainObject( aValue ) &&
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ve.compareObjects( aValue, bValue )
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) ||
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aValue === bValue
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)
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) {
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return false;
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}
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}
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return true;
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};
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/**
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* Gets a deep copy of an array's string, number, array, plain-object and cloneable object contents.
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*
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* @static
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* @method
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* @param {Array} source Array to copy
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* @returns {Array} Copy of source array
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*/
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ve.copyArray = function ( source ) {
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var i, sourceValue, sourceType,
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destination = [];
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for ( i = 0; i < source.length; i++ ) {
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sourceValue = source[i];
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sourceType = typeof sourceValue;
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if ( sourceType === 'string' || sourceType === 'number' || sourceType === 'undefined' ) {
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destination.push( sourceValue );
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} else if ( ve.isPlainObject( sourceValue ) ) {
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destination.push( ve.copyObject( sourceValue ) );
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} else if ( ve.isArray( sourceValue ) ) {
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destination.push( ve.copyArray( sourceValue ) );
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} else if ( sourceValue && typeof sourceValue.clone === 'function' ) {
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destination.push( sourceValue.clone() );
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}
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}
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return destination;
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};
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/**
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* Gets a deep copy of an object's string, number, array and plain-object properties.
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*
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* @static
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* @method
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* @param {Object} source Object to copy
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* @returns {Object} Copy of source object
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*/
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ve.copyObject = function ( source ) {
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var key, sourceValue, sourceType,
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destination = {};
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if ( typeof source.clone === 'function' ) {
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return source.clone();
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}
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for ( key in source ) {
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sourceValue = source[key];
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sourceType = typeof sourceValue;
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if ( sourceType === 'string' || sourceType === 'number' || sourceType === 'undefined' ) {
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destination[key] = sourceValue;
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} else if ( ve.isPlainObject( sourceValue ) ) {
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destination[key] = ve.copyObject( sourceValue );
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} else if ( ve.isArray( sourceValue ) ) {
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destination[key] = ve.copyArray( sourceValue );
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} else if ( sourceValue && typeof sourceValue.clone === 'function' ) {
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destination[key] = sourceValue.clone();
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}
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}
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return destination;
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};
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/**
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* Splice one array into another.
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*
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* This is the equivalent of arr.splice( offset, remove, d1, d2, d3, ... ) except that arguments are
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* specified as an array rather than separate parameters.
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*
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* This method has been proven to be faster than using slice and concat to create a new array, but
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* performance tests should be conducted on each use of this method to verify this is true for the
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* particular use. Also, browsers change fast, never assume anything, always test everything.
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*
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* @static
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* @method
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* @param {Array} arr Array to remove from and insert into. Will be modified
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* @param {Number} offset Offset in arr to splice at. May be negative; see the 'index'
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* parameter for Array.prototype.splice()
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* @param {Number} remove Number of elements to remove at the offset. May be zero
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* @param {Array} data Array of items to insert at the offset
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*/
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ve.batchSplice = function ( arr, offset, remove, data ) {
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// We need to splice insertion in in batches, because of parameter list length limits which vary
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// cross-browser - 1024 seems to be a safe batch size on all browsers
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var index = 0, batchSize = 1024, toRemove = remove;
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if ( data.length === 0 ) {
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// Special case: data is empty, so we're just doing a removal
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// The code below won't handle that properly, so we do it here
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arr.splice( offset, remove );
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return;
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}
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while ( index < data.length ) {
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// Call arr.splice( offset, remove, i0, i1, i2, ..., i1023 );
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// Only set remove on the first call, and set it to zero on subsequent calls
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arr.splice.apply(
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arr, [index + offset, toRemove].concat( data.slice( index, index + batchSize ) )
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);
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index += batchSize;
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toRemove = 0;
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}
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};
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/**
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* Insert one array into another. This just calls ve.batchSplice( dst, offset, 0, src )
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*
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* @static
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* @method
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* @see ve.batchSplice
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*/
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ve.insertIntoArray = function ( dst, offset, src ) {
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ve.batchSplice( dst, offset, 0, src );
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};
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/**
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* Logs data to the console.
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*
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* This implementation does nothing, to add a real implmementation ve.debug needs to be loaded.
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*
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* @static
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* @method
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* @param {Mixed} [...] Data to log
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*/
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ve.log = function () {
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// don't do anything, this is just a stub
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};
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/**
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|
* Logs an object to the console.
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|
*
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* This implementation does nothing, to add a real implmementation ve.debug needs to be loaded.
|
|
*
|
|
* @static
|
|
* @method
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|
* @param {Object} obj Object to log
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|
*/
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|
ve.dir = function () {
|
|
// don't do anything, this is just a stub
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|
};
|
|
|
|
/**
|
|
* Ported from: http://underscorejs.org/underscore.js
|
|
*
|
|
* Returns a function, that, as long as it continues to be invoked, will not
|
|
* be triggered. The function will be called after it stops being called for
|
|
* N milliseconds. If `immediate` is passed, trigger the function on the
|
|
* leading edge, instead of the trailing.
|
|
*
|
|
* @static
|
|
* @method
|
|
* @param func
|
|
* @param wait
|
|
* @param immediate
|
|
*/
|
|
ve.debounce = function ( func, wait, immediate ) {
|
|
var timeout;
|
|
return function () {
|
|
var context = this,
|
|
args = arguments,
|
|
later = function () {
|
|
timeout = null;
|
|
if ( !immediate ) {
|
|
func.apply( context, args );
|
|
}
|
|
};
|
|
if ( immediate && !timeout ) {
|
|
func.apply( context, args );
|
|
}
|
|
clearTimeout( timeout );
|
|
timeout = setTimeout( later, wait );
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Gets a localized message.
|
|
*
|
|
* @static
|
|
* @method
|
|
* @param {String} key Message key
|
|
* @param {Mixed} [...] Message parameters
|
|
*/
|
|
ve.msg = function () {
|
|
return ve.init.platform.getMessage.apply( ve.init.platform, arguments );
|
|
};
|
|
|
|
/**
|
|
* Escapes non-word characters so they can be safely used as HTML attribute values.
|
|
*
|
|
* This method is basically a copy of mw.html.escape.
|
|
*
|
|
* @static
|
|
* @method
|
|
* @param {String} value Attribute value to escape
|
|
* @returns {String} Escaped attribute value
|
|
*/
|
|
ve.escapeHtml = function ( value ) {
|
|
return value.replace( /['"<>&]/g, ve.escapeHtml.escapeHtmlCharacter );
|
|
};
|
|
|
|
/**
|
|
* Helper function for ve.escapeHtml which escapes a character for use in HTML.
|
|
*
|
|
* This is a callback passed into String.prototype.replace.
|
|
*
|
|
* @static
|
|
* @method
|
|
* @param {String} key Property name of value being replaced
|
|
* @returns {String} Escaped charcater
|
|
*/
|
|
ve.escapeHtml.escapeHtmlCharacter = function ( value ) {
|
|
switch ( value ) {
|
|
case '\'':
|
|
return ''';
|
|
case '"':
|
|
return '"';
|
|
case '<':
|
|
return '<';
|
|
case '>':
|
|
return '>';
|
|
case '&':
|
|
return '&';
|
|
default:
|
|
return value;
|
|
}
|
|
};
|
|
|
|
// Expose
|
|
window.ve = ve;
|
|
}() );
|