mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-29 08:34:54 +00:00
ca98a473c2
On browsers that implement the Navigation Timing API, performance.now() provides values with microsecond precision that are guaranteed to be monotonic (i.e., they are not subject to skew due to changes to the system clock). This patch adds a `ve.now` utility function that will use this API when it is available and fall back gracefully to `Date.now` when it is not. Change-Id: I377025fcb23cb26399b9e437e33c8afa138916af
1031 lines
32 KiB
JavaScript
1031 lines
32 KiB
JavaScript
/*!
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* VisualEditor namespace.
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*
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* @copyright 2011-2013 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 ( oo ) {
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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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* @class
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* @singleton
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*/
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ve = {
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// List of instances of ve.ui.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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* @method
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* @until ES5: Object#create
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* @inheritdoc Object#create
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*/
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ve.createObject = Object.create;
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/**
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* @method
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* @inheritdoc OO#inheritClass
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*/
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ve.inheritClass = oo.inheritClass;
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/**
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* Checks if an object is an instance of one or more classes.
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*
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* @method
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* @param {Object} subject Object to check
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* @param {Function[]} classes Classes to compare with
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* @return {boolean} Object inherits from one or more of the classes
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*/
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ve.isInstanceOfAny = function ( subject, classes ) {
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var i = classes.length;
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while ( classes[--i] ) {
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if ( subject instanceof classes[i] ) {
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return true;
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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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* @method
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* @inheritdoc OO#mixinClass
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*/
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ve.mixinClass = function ( targetFn, originFn ) {
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oo.mixinClass( targetFn, originFn );
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// Track mixins
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targetFn.mixins = targetFn.mixins || [];
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targetFn.mixins.push( originFn );
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};
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/**
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* Check if a constructor or object contains a certain mixin.
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*
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* @param {Function|Object} a Class or object to check
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* @param {Function} mixin Mixin to check for
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* @returns {boolean} Class or object uses mixin
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*/
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ve.isMixedIn = function ( subject, mixin ) {
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// Traverse from instances to the constructor
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if ( $.type( subject ) !== 'function' ) {
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subject = subject.constructor;
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}
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return !!subject.mixins && subject.mixins.indexOf( mixin ) !== -1;
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};
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/**
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* @method
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* @inheritdoc OO#cloneObject
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*/
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ve.cloneObject = oo.cloneObject;
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/**
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* @method
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* @inheritdoc OO#cloneObject
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*/
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ve.getObjectValues = oo.getObjectValues;
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/**
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* @method
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* @until ES5: Object#keys
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* @inheritdoc Object#keys
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*/
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ve.getObjectKeys = Object.keys;
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/**
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* @method
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* @inheritdoc OO#compare
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*/
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ve.compare = oo.compare;
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/**
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* @method
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* @inheritdoc OO#copy
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*/
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ve.copy = oo.copy;
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/**
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* Copy an array of DOM elements, optionally into a different document.
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*
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* @param {HTMLElement[]} domElements DOM elements to copy
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* @param {HTMLDocument} [doc] Document to create the copies in; if unset, simply clone each element
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* @return {HTMLElement[]} Copy of domElements with copies of each element
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*/
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ve.copyDomElements = function ( domElements, doc ) {
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return domElements.map( function ( domElement ) {
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return doc ? doc.importNode( domElement, true ) : domElement.cloneNode( true );
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} );
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};
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/**
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* Check to see if an object is a plain object (created using "{}" or "new Object").
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*
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* @method
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* @source <http://api.jquery.com/jQuery.isPlainObject/>
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* @param {Object} obj The object that will be checked to see if it's a plain object
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* @returns {boolean}
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*/
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ve.isPlainObject = $.isPlainObject;
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/**
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* Check to see if an object is empty (contains no properties).
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*
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* @method
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* @source <http://api.jquery.com/jQuery.isEmptyObject/>
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* @param {Object} obj The object that will be checked to see if it's empty
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* @returns {boolean}
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*/
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ve.isEmptyObject = $.isEmptyObject;
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/**
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* @method
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* @until ES5: Array#isArray
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* @inheritdoc Array#isArray
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*/
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ve.isArray = Array.isArray;
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/**
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* Wrapper for Function#bind.
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*
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* Create a function that 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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* execution time based on how it is invoked (e.g. object member, call/apply,
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* global scope, etc.).
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*
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* Performance optimization: <http://jsperf.com/function-bind-shim-perf>
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*
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* @method
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* @source <http://api.jquery.com/jQuery.proxy/>
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* @until ES5: Function#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...} [args] Variadic list of arguments to prepend to arguments
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* to the bound function
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* @returns {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#indexOf.
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*
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* Values are compared without type coercion.
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*
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* @method
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* @source <http://api.jquery.com/jQuery.inArray/>
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* @until ES5: Array#indexOf
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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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* @returns {number} Index of value in array, or -1 if not found
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*/
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ve.indexOf = $.inArray;
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/**
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* Compute the union (duplicate-free merge) of a set of arrays.
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*
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* Arrays values must be convertable to object keys (strings)
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*
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* By building an object (with the values for keys) in parallel with
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* the array, a new item's existence in the union can be computed faster
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*
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* @param {Array...} arrays Arrays to union
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* @returns {Array} Union of the arrays
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*/
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ve.simpleArrayUnion = function () {
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var i, ilen, j, jlen, arr, obj = {}, result = [];
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for ( i = 0, ilen = arguments.length; i < ilen; i++ ) {
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arr = arguments[i];
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for ( j = 0, jlen = arr.length; j < jlen; j++ ) {
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if ( !obj[arr[j]] ) {
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obj[arr[j]] = true;
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result.push( arr[j] );
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}
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}
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}
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return result;
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};
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/**
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* Compute the intersection of two arrays (items in both arrays).
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*
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* Arrays values must be convertable to object keys (strings)
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*
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* @param {Array} a First array
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* @param {Array} b Second array
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* @returns {Array} Intersection of arrays
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*/
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ve.simpleArrayIntersection = function ( a, b ) {
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return ve.simpleArrayCombine( a, b, true );
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};
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/**
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* Compute the difference of two arrays (items in 'a' but not 'b').
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*
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* Arrays values must be convertable to object keys (strings)
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*
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* @param {Array} a First array
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* @param {Array} b Second array
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* @returns {Array} Intersection of arrays
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*/
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ve.simpleArrayDifference = function ( a, b ) {
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return ve.simpleArrayCombine( a, b, false );
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};
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/**
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* Combine arrays (intersection or difference).
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*
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* An intersection checks the item exists in 'b' while difference checks it doesn't.
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*
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* Arrays values must be convertable to object keys (strings)
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*
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* By building an object (with the values for keys) of 'b' we can
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* compute the result faster
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*
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* @param {Array} a First array
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* @param {Array} b Second array
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* @param {boolean} includeB Include items in 'b'
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* @returns {Array} Combination (intersection or difference) of arrays
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*/
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ve.simpleArrayCombine = function ( a, b, includeB ) {
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var i, ilen, isInB, bObj = {}, result = [];
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for ( i = 0, ilen = b.length; i < ilen; i++ ) {
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bObj[b[i]] = true;
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}
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for ( i = 0, ilen = a.length; i < ilen; i++ ) {
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isInB = !!bObj[a[i]];
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if ( isInB === includeB ) {
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result.push( a[i] );
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}
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}
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return result;
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};
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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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* @method
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* @source <http://api.jquery.com/jQuery.extend/>
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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...} [sources] Variadic list of objects containing properties
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* to be merged into the targe.
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* @returns {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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* Objects and arrays are hashed recursively. When hashing an object that has a .getHash()
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* function, we call that function and use its return value rather than hashing the object
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* ourselves. This allows classes to define custom hashing.
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*
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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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* @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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if ( val && typeof val.getHashObject === 'function' ) {
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// This object has its own custom hash function, use it
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val = val.getHashObject();
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}
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if ( !ve.isArray( val ) && Object( val ) === val ) {
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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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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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* 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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* Includes a replacement for broken implementation of Array.prototype.splice() found in Opera 12.
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*
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* @param {Array|ve.dm.BranchNode} arr Object supporting .splice() to remove from and insert into. Will be modified
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* @param {number} offset Offset in arr to splice at. This may NOT be negative, unlike the
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* 'index' parameter in Array#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. May not be empty if remove=0
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* @returns {Array} Array of items removed
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*/
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ve.batchSplice = ( function () {
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var arraySplice;
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// This yields 'true' on Opera 12.15.
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function isSpliceBroken() {
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var n = 256, a = [];
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a[n] = 'a';
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a.splice( n + 1, 0, 'b' );
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return a[n] !== 'a';
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}
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if ( !isSpliceBroken() ) {
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arraySplice = Array.prototype.splice;
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} else {
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// Standard Array.prototype.splice() function implemented using .slice() and .push().
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arraySplice = function ( offset, remove/*, data... */ ) {
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var data, begin, removed, end;
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data = Array.prototype.slice.call( arguments, 2 );
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begin = this.slice( 0, offset );
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removed = this.slice( offset, remove );
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end = this.slice( offset + remove );
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this.length = 0;
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// This polyfill only been discovered to be necessary on Opera
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// and it seems to handle up to 1048575 function parameters.
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this.push.apply( this, begin );
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this.push.apply( this, data );
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this.push.apply( this, end );
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return removed;
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};
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}
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return 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 splice, index = 0, batchSize = 1024, toRemove = remove, spliced, removed = [];
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splice = ve.isArray( arr ) ? arraySplice : arr.splice;
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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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return splice.call( arr, offset, remove );
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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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spliced = splice.apply(
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arr, [index + offset, toRemove].concat( data.slice( index, index + batchSize ) )
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);
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if ( toRemove > 0 ) {
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removed = spliced;
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}
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index += batchSize;
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toRemove = 0;
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}
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return removed;
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};
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}() );
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/**
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* Insert one array into another.
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*
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* This just a shortcut for `ve.batchSplice( dst, offset, 0, src )`.
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*
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* @see #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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* Get a deeply nested property of an object using variadic arguments, protecting against
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* undefined property errors.
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*
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* `quux = getProp( obj, 'foo', 'bar', 'baz' );` is equivalent to `quux = obj.foo.bar.baz;`
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* except that the former protects against JS errors if one of the intermediate properties
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* is undefined. Instead of throwing an error, this function will return undefined in
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* that case.
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*
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* @param {Object} obj
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* @param {Mixed...} [keys]
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* @returns obj[arguments[1]][arguments[2]].... or undefined
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*/
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ve.getProp = function ( obj ) {
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var i, retval = obj;
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for ( i = 1; i < arguments.length; i++ ) {
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if ( retval === undefined || retval === null ) {
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// Trying to access a property of undefined or null causes an error
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return undefined;
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}
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retval = retval[arguments[i]];
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}
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return retval;
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};
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/**
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* Set a deeply nested property of an object using variadic arguments, protecting against
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* undefined property errors.
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*
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* `ve.setProp( obj, 'foo', 'bar', 'baz' );` is equivalent to `obj.foo.bar = baz;` except that
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* the former protects against JS errors if one of the intermediate properties is
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* undefined. Instead of throwing an error, undefined intermediate properties will be
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* initialized to an empty object. If an intermediate property is null, or if obj itself
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* is undefined or null, this function will silently abort.
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*
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* @param {Object} obj
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* @param {Mixed...} [keys]
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* @param {Mixed} [value]
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*/
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ve.setProp = function ( obj /*, keys ... , value */ ) {
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var i, prop = obj;
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if ( Object( obj ) !== obj ) {
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return;
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}
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for ( i = 1; i < arguments.length - 2; i++ ) {
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if ( prop[arguments[i]] === undefined ) {
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prop[arguments[i]] = {};
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}
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if ( prop[arguments[i]] === null || typeof prop[arguments[i]] !== 'object' ) {
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return;
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}
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prop = prop[arguments[i]];
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}
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prop[arguments[arguments.length - 2]] = arguments[arguments.length - 1];
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};
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/**
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* Log 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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* @param {Mixed...} [args] 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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* Log 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.
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*
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* @param {Object} obj
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*/
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ve.dir = function () {
|
|
// don't do anything, this is just a stub
|
|
};
|
|
|
|
/**
|
|
* Return 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.
|
|
*
|
|
* Ported from: http://underscorejs.org/underscore.js
|
|
*
|
|
* @param {Function} func
|
|
* @param {number} wait
|
|
* @param {boolean} immediate
|
|
* @returns {Function}
|
|
*/
|
|
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 );
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Move the selection to the end of an input.
|
|
*
|
|
* @param {HTMLElement} element Input element
|
|
*/
|
|
ve.selectEnd = function ( element ) {
|
|
element.focus();
|
|
if ( element.selectionStart !== undefined ) {
|
|
element.selectionStart = element.selectionEnd = element.value.length;
|
|
} else if ( element.createTextRange ) {
|
|
var textRange = element.createTextRange();
|
|
textRange.collapse( false );
|
|
textRange.select();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get a localized message.
|
|
*
|
|
* @param {string} key Message key
|
|
* @param {Mixed...} [params] Message parameters
|
|
*/
|
|
ve.msg = function () {
|
|
// Avoid using ve.bind because ve.init.platform doesn't exist yet.
|
|
// TODO: Fix dependency issues between ve.js and ve.init.platform
|
|
return ve.init.platform.getMessage.apply( ve.init.platform, arguments );
|
|
};
|
|
|
|
/**
|
|
* @method
|
|
* @inheritdoc unicodeJS.graphemebreak#splitClusters
|
|
* @see unicodeJS.graphemebreak#splitClusters
|
|
*/
|
|
ve.splitClusters = unicodeJS.graphemebreak.splitClusters;
|
|
|
|
/**
|
|
* Determine if the text consists of only unattached combining marks.
|
|
*
|
|
* @param {string} text Text to test
|
|
* @returns {boolean} The text is unattached combining marks
|
|
*/
|
|
ve.isUnattachedCombiningMark = function ( text ) {
|
|
return ( /^[\u0300-\u036F]+$/ ).test( text );
|
|
};
|
|
|
|
/**
|
|
* Convert a grapheme cluster offset to a byte offset.
|
|
*
|
|
* @param {string} text Text in which to calculate offset
|
|
* @param {number} clusterOffset Grapheme cluster offset
|
|
* @returns {number} Byte offset
|
|
*/
|
|
ve.getByteOffset = function ( text, clusterOffset ) {
|
|
return ve.splitClusters( text ).slice( 0, clusterOffset ).join( '' ).length;
|
|
};
|
|
|
|
/**
|
|
* Convert a byte offset to a grapheme cluster offset.
|
|
*
|
|
* @param {string} text Text in which to calculate offset
|
|
* @param {number} byteOffset Byte offset
|
|
* @returns {number} Grapheme cluster offset
|
|
*/
|
|
ve.getClusterOffset = function ( text, byteOffset ) {
|
|
return ve.splitClusters( text.substring( 0, byteOffset ) ).length;
|
|
};
|
|
|
|
/**
|
|
* Get a text substring, taking care not to split grapheme clusters.
|
|
*
|
|
* @param {string} text Text to take the substring from
|
|
* @param {number} start Start offset
|
|
* @param {number} end End offset
|
|
* @param {boolean} [outer=false] Include graphemes if the offset splits them
|
|
* @returns {string} Substring of text
|
|
*/
|
|
ve.graphemeSafeSubstring = function ( text, start, end, outer ) {
|
|
// TODO: improve performance by incrementally inspecting characters around the offsets
|
|
var unicodeStart = ve.getByteOffset( text, ve.getClusterOffset( text, start ) ),
|
|
unicodeEnd = ve.getByteOffset( text, ve.getClusterOffset( text, end ) );
|
|
|
|
// If the selection collapses and we want an inner, then just return empty
|
|
// otherwise we'll end up crossing over start and end
|
|
if ( unicodeStart === unicodeEnd && !outer ) {
|
|
return '';
|
|
}
|
|
|
|
// The above calculations always move to the right of a multibyte grapheme.
|
|
// Depending on the outer flag, we may want to move to the left:
|
|
if ( unicodeStart > start && outer ) {
|
|
unicodeStart = ve.getByteOffset( text, ve.getClusterOffset( text, start ) - 1 );
|
|
}
|
|
if ( unicodeEnd > end && !outer ) {
|
|
unicodeEnd = ve.getByteOffset( text, ve.getClusterOffset( text, end ) - 1 );
|
|
}
|
|
return text.substring( unicodeStart, unicodeEnd );
|
|
};
|
|
|
|
/**
|
|
* Escape non-word characters so they can be safely used as HTML attribute values.
|
|
*
|
|
* This method is basically a copy of `mw.html.escape`.
|
|
*
|
|
* @see #escapeHtml_escapeHtmlCharacter
|
|
* @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 #escapeHtml to escape a character for use in HTML.
|
|
*
|
|
* This is a callback intended to be passed to String#replace.
|
|
*
|
|
* @method escapeHtml_escapeHtmlCharacter
|
|
* @private
|
|
* @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;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Generate an opening HTML tag.
|
|
*
|
|
* This method copies part of `mw.html.element` from MediaWiki.
|
|
*
|
|
* NOTE: While the values of attributes are escaped, the tag name and the names of
|
|
* attributes (i.e. the keys in the attributes objects) are NOT ESCAPED. The caller is
|
|
* responsible for making sure these are sane tag/attribute names and do not contain
|
|
* unsanitized content from an external source (e.g. from the user or from the web).
|
|
*
|
|
* @param {string} tag HTML tag name
|
|
* @param {Object} attributes Key-value map of attributes for the tag
|
|
* @returns {string} Opening HTML tag
|
|
*/
|
|
ve.getOpeningHtmlTag = function ( tagName, attributes ) {
|
|
var html, attrName, attrValue;
|
|
html = '<' + tagName;
|
|
for ( attrName in attributes ) {
|
|
attrValue = attributes[attrName];
|
|
if ( attrValue === true ) {
|
|
// Convert name=true to name=name
|
|
attrValue = attrName;
|
|
} else if ( attrValue === false ) {
|
|
// Skip name=false
|
|
continue;
|
|
}
|
|
html += ' ' + attrName + '="' + ve.escapeHtml( String( attrValue ) ) + '"';
|
|
}
|
|
html += '>';
|
|
return html;
|
|
};
|
|
|
|
/**
|
|
* Get the attributes of a DOM element as an object with key/value pairs.
|
|
*
|
|
* @param {HTMLElement} element
|
|
* @returns {Object}
|
|
*/
|
|
ve.getDomAttributes = function ( element ) {
|
|
var result = {}, i;
|
|
for ( i = 0; i < element.attributes.length; i++ ) {
|
|
result[element.attributes[i].name] = element.attributes[i].value;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Set the attributes of a DOM element as an object with key/value pairs.
|
|
*
|
|
* @param {HTMLElement} element DOM element to apply attributes to
|
|
* @param {Object} attributes Attributes to apply
|
|
* @param {string[]} [whitelist] List of attributes to exclusively allow (all lower case names)
|
|
*/
|
|
ve.setDomAttributes = function ( element, attributes, whitelist ) {
|
|
var key;
|
|
// Duck-typing for attribute setting
|
|
if ( !element.setAttribute || !element.removeAttribute ) {
|
|
return;
|
|
}
|
|
for ( key in attributes ) {
|
|
if ( attributes[key] === undefined || attributes[key] === null ) {
|
|
element.removeAttribute( key );
|
|
} else {
|
|
if ( whitelist && whitelist.indexOf( key.toLowerCase() ) === -1 ) {
|
|
continue;
|
|
}
|
|
element.setAttribute( key, attributes[key] );
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Build a summary of an HTML element.
|
|
*
|
|
* Summaries include node name, text, attributes and recursive summaries of children.
|
|
* Used for serializing or comparing HTML elements.
|
|
*
|
|
* @private
|
|
* @param {HTMLElement} element Element to summarize
|
|
* @returns {Object} Summary of element.
|
|
*/
|
|
ve.getDomElementSummary = function ( element ) {
|
|
var i,
|
|
$element = $( element ),
|
|
summary = {
|
|
'type': element.nodeName.toLowerCase(),
|
|
'text': $element.text(),
|
|
'attributes': {},
|
|
'children': []
|
|
};
|
|
|
|
// Gather attributes
|
|
if ( element.attributes ) {
|
|
for ( i = 0; i < element.attributes.length; i++ ) {
|
|
summary.attributes[element.attributes[i].name] = element.attributes[i].value;
|
|
}
|
|
}
|
|
// Summarize children
|
|
if ( element.childNodes ) {
|
|
for ( i = 0; i < element.childNodes.length; i++ ) {
|
|
if ( element.childNodes[i].nodeType !== Node.TEXT_NODE ) {
|
|
summary.children.push( ve.getDomElementSummary( element.childNodes[i] ) );
|
|
}
|
|
}
|
|
}
|
|
return summary;
|
|
};
|
|
|
|
/**
|
|
* Callback for #copy to convert nodes to a comparable summary.
|
|
*
|
|
* @private
|
|
* @param {Object} value Value in the object/array
|
|
* @returns {Object} DOM element summary if value is a node, otherwise just the value
|
|
*/
|
|
ve.convertDomElements = function ( value ) {
|
|
// Use duck typing rather than instanceof Node; the latter doesn't always work correctly
|
|
if ( value && value.nodeType ) {
|
|
return ve.getDomElementSummary( value );
|
|
}
|
|
return value;
|
|
};
|
|
|
|
/**
|
|
* Check whether a given DOM element is of a block or inline type.
|
|
*
|
|
* @param {HTMLElement} element
|
|
* @returns {boolean} True if element is block, false if it is inline
|
|
*/
|
|
ve.isBlockElement = function ( element ) {
|
|
return ve.isBlockElementType( element.nodeName.toLowerCase() );
|
|
};
|
|
|
|
/**
|
|
* Check whether a given tag name is a block or inline tag.
|
|
*
|
|
* @param {string} nodeName All-lowercase HTML tag name
|
|
* @returns {boolean} True if block, false if inline
|
|
*/
|
|
ve.isBlockElementType = function ( nodeName ) {
|
|
return ve.indexOf( nodeName, ve.isBlockElementType.blockTypes ) !== -1;
|
|
};
|
|
|
|
/**
|
|
* Private data for #isBlockElementType.
|
|
*
|
|
*/
|
|
ve.isBlockElementType.blockTypes = [
|
|
'div', 'p',
|
|
// tables
|
|
'table', 'tbody', 'thead', 'tfoot', 'caption', 'th', 'tr', 'td',
|
|
// lists
|
|
'ul', 'ol', 'li', 'dl', 'dt', 'dd',
|
|
// HTML5 heading content
|
|
'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hgroup',
|
|
// HTML5 sectioning content
|
|
'article', 'aside', 'body', 'nav', 'section', 'footer', 'header', 'figure',
|
|
'figcaption', 'fieldset', 'details', 'blockquote',
|
|
// other
|
|
'hr', 'button', 'canvas', 'center', 'col', 'colgroup', 'embed',
|
|
'map', 'object', 'pre', 'progress', 'video'
|
|
];
|
|
|
|
/**
|
|
* Create an HTMLDocument from an HTML string.
|
|
*
|
|
* The html parameter is supposed to be a full HTML document with a doctype and an `<html>` tag.
|
|
* If you pass a document fragment, it may or may not work, this is at the mercy of the browser.
|
|
*
|
|
* To create an empty document, pass the empty string.
|
|
*
|
|
* @param {string} html HTML string
|
|
* @returns {HTMLDocument} Document constructed from the HTML string
|
|
*/
|
|
ve.createDocumentFromHtml = function ( html ) {
|
|
// Here's how this function should look:
|
|
//
|
|
// var newDocument = document.implementation.createHtmlDocument( '' );
|
|
// newDocument.open();
|
|
// newDocument.write( html );
|
|
// newDocument.close();
|
|
// return newDocument;
|
|
//
|
|
// (Or possibly something involving DOMParser.prototype.parseFromString, but that's Firefox-only
|
|
// for now.)
|
|
//
|
|
// Sadly, it's impossible:
|
|
// * On IE 9, calling open()/write() on such a document throws an "Unspecified error" (sic).
|
|
// * On Firefox 20, calling open()/write() doesn't actually do anything, including writing.
|
|
// This is reported as Firefox bug 867102.
|
|
// * On Opera 12, calling open()/write() behaves as if called on window.document, replacing the
|
|
// entire contents of the page with new HTML. This is reported as Opera bug DSK-384486.
|
|
//
|
|
// Funnily, in all of those browsers it's apparently perfectly legal and possible to access the
|
|
// newly created document's DOM itself, including modifying documentElement's innerHTML, which
|
|
// would achieve our goal. But that requires some nasty magic to strip off the <html></html> tag
|
|
// itself, so we're not doing that. (We can't use .outerHTML, either, as the spec disallows
|
|
// assigning to it for the root element.)
|
|
//
|
|
// There is one more way - create an <iframe>, append it to current document, and access its
|
|
// contentDocument. The only browser having issues with that is Opera (sometimes the accessible
|
|
// value is not actually a Document, but something which behaves just like an empty regular
|
|
// object...), so we're detecting that and using the innerHTML hack described above.
|
|
|
|
// Create an invisible iframe
|
|
var newDocument, $iframe = $( '<iframe frameborder="0" width="0" height="0" />'),
|
|
iframe = $iframe.get( 0 );
|
|
// Attach it to the document. We have to do this to get a new document out of it
|
|
document.documentElement.appendChild( iframe );
|
|
// Write the HTML to it
|
|
newDocument = ( iframe.contentWindow && iframe.contentWindow.document ) || iframe.contentDocument;
|
|
newDocument.open();
|
|
newDocument.write( html ); // Party like it's 1995!
|
|
newDocument.close();
|
|
// Detach the iframe
|
|
// FIXME detaching breaks access to newDocument in IE
|
|
iframe.parentNode.removeChild( iframe );
|
|
|
|
if ( !newDocument.documentElement || newDocument.documentElement.cloneNode() === undefined ) {
|
|
// Surprise! The document is not a document! Only happens on Opera.
|
|
// (Or its nodes are not actually nodes, while the document
|
|
// *is* a document. This only happens when debugging with Dragonfly.)
|
|
newDocument = document.implementation.createHTMLDocument( '' );
|
|
// Carefully unwrap the HTML out of the root node (and doctype, if any).
|
|
// <html> might have some arguments here, but they're apparently not important.
|
|
html = html.replace(/^\s*(?:<!doctype[^>]*>)?\s*<html[^>]*>/i, '' );
|
|
html = html.replace(/<\/html>\s*$/i, '' );
|
|
newDocument.documentElement.innerHTML = html;
|
|
}
|
|
|
|
return newDocument;
|
|
};
|
|
|
|
/**
|
|
* Get the actual inner HTML of a DOM node.
|
|
*
|
|
* In most browsers, .innerHTML is broken and eats newlines in `<pre>` elements, see
|
|
* https://bugzilla.mozilla.org/show_bug.cgi?id=838954 . This function detects this behavior
|
|
* and works around it, to the extent possible. `<pre>\nFoo</pre>` will become `<pre>Foo</pre>`
|
|
* if the browser is broken, but newlines are preserved in all other cases.
|
|
*
|
|
* @param {HTMLElement} element HTML element to get inner HTML of
|
|
* @returns {string} Inner HTML
|
|
*/
|
|
ve.properInnerHtml = function ( element ) {
|
|
return ve.fixupPreBug( element ).innerHTML;
|
|
};
|
|
|
|
/**
|
|
* Get the actual outer HTML of a DOM node.
|
|
*
|
|
* @see ve#properInnerHtml
|
|
* @param {HTMLElement} element HTML element to get outer HTML of
|
|
* @returns {string} Outer HTML
|
|
*/
|
|
ve.properOuterHtml = function ( element ) {
|
|
return ve.fixupPreBug( element ).outerHTML;
|
|
};
|
|
|
|
/**
|
|
* Helper function for ve#properInnerHtml and #properOuterHtml.
|
|
*
|
|
* Detect whether the browser has broken `<pre>` serialization, and if so return a clone
|
|
* of the node with extra newlines added to make it serialize properly. If the browser is not
|
|
* broken, just return the original node.
|
|
*
|
|
* @param {HTMLElement} element HTML element to fix up
|
|
* @returns {HTMLElement} Either element, or a fixed-up clone of it
|
|
*/
|
|
ve.fixupPreBug = function ( element ) {
|
|
var div, $element;
|
|
if ( ve.isPreInnerHtmlBroken === undefined ) {
|
|
// Test whether newlines in `<pre>` are serialized back correctly
|
|
div = document.createElement( 'div' );
|
|
div.innerHTML = '<pre>\n\n</pre>';
|
|
ve.isPreInnerHtmlBroken = div.innerHTML === '<pre>\n</pre>';
|
|
}
|
|
|
|
if ( !ve.isPreInnerHtmlBroken ) {
|
|
return element;
|
|
}
|
|
|
|
// Workaround for bug 42469: if a `<pre>` starts with a newline, that means .innerHTML will
|
|
// screw up and stringify it with one fewer newline. Work around this by adding a newline.
|
|
// If we don't see a leading newline, we still don't know if the original HTML was
|
|
// `<pre>Foo</pre>` or `<pre>\nFoo</pre>` , but that's a syntactic difference, not a
|
|
// semantic one, and handling that is Parsoid's job.
|
|
$element = $( element ).clone();
|
|
$element.find( 'pre, textarea, listing' ).each( function () {
|
|
var matches;
|
|
if ( this.firstChild && this.firstChild.nodeType === Node.TEXT_NODE ) {
|
|
matches = this.firstChild.data.match( /^(\r\n|\r|\n)/ );
|
|
if ( matches && matches[1] ) {
|
|
// Prepend a newline exactly like the one we saw
|
|
this.firstChild.insertData( 0, matches[1] );
|
|
}
|
|
}
|
|
} );
|
|
return $element.get( 0 );
|
|
};
|
|
|
|
/**
|
|
* 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.now`.
|
|
*
|
|
* @returns {number} Current time
|
|
*/
|
|
ve.now = ( function () {
|
|
var perf = window.performance,
|
|
navStart = perf && perf.timing && perf.timing.navigationStart;
|
|
return navStart && typeof perf.now === 'function' ?
|
|
function () { return navStart + perf.now(); } : Date.now;
|
|
}() );
|
|
|
|
// Add more as you need
|
|
ve.Keys = {
|
|
'UNDEFINED': 0,
|
|
'BACKSPACE': 8,
|
|
'DELETE': 46,
|
|
'LEFT': 37,
|
|
'RIGHT': 39,
|
|
'UP': 38,
|
|
'DOWN': 40,
|
|
'ENTER': 13,
|
|
'END': 35,
|
|
'HOME': 36,
|
|
'TAB': 9,
|
|
'PAGEUP': 33,
|
|
'PAGEDOWN': 34,
|
|
'ESCAPE': 27,
|
|
'SHIFT': 16,
|
|
'SPACE': 32
|
|
};
|
|
|
|
// Expose
|
|
window.ve = ve;
|
|
}( OO ) );
|