735 lines
21 KiB
JavaScript
735 lines
21 KiB
JavaScript
/*
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Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
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For licensing, see LICENSE.html or http://ckeditor.com/license
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*/
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/**
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* @fileOverview Defines the {@link CKEDITOR.tools} object, which contains
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* utility functions.
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*/
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(function()
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{
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var functions = [];
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CKEDITOR.on( 'reset', function()
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{
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functions = [];
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});
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/**
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* Utility functions.
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* @namespace
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* @example
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*/
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CKEDITOR.tools =
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{
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/**
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* Compare the elements of two arrays.
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* @param {Array} arrayA An array to be compared.
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* @param {Array} arrayB The other array to be compared.
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* @returns {Boolean} "true" is the arrays have the same lenght and
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* their elements match.
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* @example
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* var a = [ 1, 'a', 3 ];
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* var b = [ 1, 3, 'a' ];
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* var c = [ 1, 'a', 3 ];
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* var d = [ 1, 'a', 3, 4 ];
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*
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* alert( CKEDITOR.tools.arrayCompare( a, b ) ); // false
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* alert( CKEDITOR.tools.arrayCompare( a, c ) ); // true
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* alert( CKEDITOR.tools.arrayCompare( a, d ) ); // false
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*/
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arrayCompare : function( arrayA, arrayB )
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{
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if ( !arrayA && !arrayB )
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return true;
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if ( !arrayA || !arrayB || arrayA.length != arrayB.length )
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return false;
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for ( var i = 0 ; i < arrayA.length ; i++ )
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{
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if ( arrayA[ i ] != arrayB[ i ] )
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return false;
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}
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return true;
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},
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/**
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* Creates a deep copy of an object.
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* Attention: there is no support for recursive references.
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* @param {Object} object The object to be cloned.
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* @returns {Object} The object clone.
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* @example
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* var obj =
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* {
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* name : 'John',
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* cars :
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* {
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* Mercedes : { color : 'blue' },
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* Porsche : { color : 'red' }
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* }
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* };
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* var clone = CKEDITOR.tools.clone( obj );
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* clone.name = 'Paul';
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* clone.cars.Porsche.color = 'silver';
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* alert( obj.name ); // John
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* alert( clone.name ); // Paul
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* alert( obj.cars.Porsche.color ); // red
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* alert( clone.cars.Porsche.color ); // silver
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*/
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clone : function( obj )
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{
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var clone;
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// Array.
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if ( obj && ( obj instanceof Array ) )
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{
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clone = [];
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for ( var i = 0 ; i < obj.length ; i++ )
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clone[ i ] = this.clone( obj[ i ] );
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return clone;
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}
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// "Static" types.
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if ( obj === null
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|| ( typeof( obj ) != 'object' )
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|| ( obj instanceof String )
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|| ( obj instanceof Number )
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|| ( obj instanceof Boolean )
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|| ( obj instanceof Date )
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|| ( obj instanceof RegExp) )
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{
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return obj;
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}
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// Objects.
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clone = new obj.constructor();
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for ( var propertyName in obj )
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{
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var property = obj[ propertyName ];
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clone[ propertyName ] = this.clone( property );
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}
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return clone;
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},
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/**
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* Turn the first letter of string to upper-case.
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* @param {String} str
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*/
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capitalize: function( str )
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{
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return str.charAt( 0 ).toUpperCase() + str.substring( 1 ).toLowerCase();
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},
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/**
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* Copy the properties from one object to another. By default, properties
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* already present in the target object <strong>are not</strong> overwritten.
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* @param {Object} target The object to be extended.
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* @param {Object} source[,souce(n)] The objects from which copy
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* properties. Any number of objects can be passed to this function.
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* @param {Boolean} [overwrite] If 'true' is specified it indicates that
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* properties already present in the target object could be
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* overwritten by subsequent objects.
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* @param {Object} [properties] Only properties within the specified names
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* list will be received from the source object.
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* @returns {Object} the extended object (target).
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* @example
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* // Create the sample object.
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* var myObject =
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* {
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* prop1 : true
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* };
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*
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* // Extend the above object with two properties.
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* CKEDITOR.tools.extend( myObject,
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* {
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* prop2 : true,
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* prop3 : true
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* } );
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*
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* // Alert "prop1", "prop2" and "prop3".
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* for ( var p in myObject )
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* alert( p );
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*/
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extend : function( target )
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{
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var argsLength = arguments.length,
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overwrite, propertiesList;
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if ( typeof ( overwrite = arguments[ argsLength - 1 ] ) == 'boolean')
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argsLength--;
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else if ( typeof ( overwrite = arguments[ argsLength - 2 ] ) == 'boolean' )
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{
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propertiesList = arguments [ argsLength -1 ];
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argsLength-=2;
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}
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for ( var i = 1 ; i < argsLength ; i++ )
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{
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var source = arguments[ i ];
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for ( var propertyName in source )
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{
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// Only copy existed fields if in overwrite mode.
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if ( overwrite === true || target[ propertyName ] == undefined )
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{
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// Only copy specified fields if list is provided.
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if ( !propertiesList || ( propertyName in propertiesList ) )
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target[ propertyName ] = source[ propertyName ];
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}
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}
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}
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return target;
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},
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/**
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* Creates an object which is an instance of a class which prototype is a
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* predefined object. All properties defined in the source object are
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* automatically inherited by the resulting object, including future
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* changes to it.
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* @param {Object} source The source object to be used as the prototype for
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* the final object.
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* @returns {Object} The resulting copy.
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*/
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prototypedCopy : function( source )
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{
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var copy = function()
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{};
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copy.prototype = source;
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return new copy();
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},
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/**
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* Checks if an object is an Array.
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* @param {Object} object The object to be checked.
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* @type Boolean
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* @returns <i>true</i> if the object is an Array, otherwise <i>false</i>.
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* @example
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* alert( CKEDITOR.tools.isArray( [] ) ); // "true"
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* alert( CKEDITOR.tools.isArray( 'Test' ) ); // "false"
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*/
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isArray : function( object )
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{
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return ( !!object && object instanceof Array );
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},
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/**
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* Whether the object contains no properties of it's own.
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* @param object
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*/
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isEmpty : function ( object )
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{
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for ( var i in object )
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{
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if ( object.hasOwnProperty( i ) )
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return false;
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}
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return true;
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},
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/**
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* Transforms a CSS property name to its relative DOM style name.
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* @param {String} cssName The CSS property name.
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* @returns {String} The transformed name.
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* @example
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* alert( CKEDITOR.tools.cssStyleToDomStyle( 'background-color' ) ); // "backgroundColor"
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* alert( CKEDITOR.tools.cssStyleToDomStyle( 'float' ) ); // "cssFloat"
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*/
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cssStyleToDomStyle : ( function()
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{
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var test = document.createElement( 'div' ).style;
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var cssFloat = ( typeof test.cssFloat != 'undefined' ) ? 'cssFloat'
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: ( typeof test.styleFloat != 'undefined' ) ? 'styleFloat'
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: 'float';
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return function( cssName )
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{
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if ( cssName == 'float' )
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return cssFloat;
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else
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{
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return cssName.replace( /-./g, function( match )
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{
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return match.substr( 1 ).toUpperCase();
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});
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}
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};
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} )(),
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/**
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* Build the HTML snippet of a set of <style>/<link>.
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* @param css {String|Array} Each of which are url (absolute) of a CSS file or
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* a trunk of style text.
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*/
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buildStyleHtml : function ( css )
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{
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css = [].concat( css );
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var item, retval = [];
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for ( var i = 0; i < css.length; i++ )
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{
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item = css[ i ];
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// Is CSS style text ?
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if ( /@import|[{}]/.test(item) )
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retval.push('<style>' + item + '</style>');
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else
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retval.push('<link type="text/css" rel=stylesheet href="' + item + '">');
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}
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return retval.join( '' );
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},
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/**
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* Replace special HTML characters in a string with their relative HTML
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* entity values.
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* @param {String} text The string to be encoded.
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* @returns {String} The encode string.
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* @example
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* alert( CKEDITOR.tools.htmlEncode( 'A > B & C < D' ) ); // "A &gt; B &amp; C &lt; D"
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*/
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htmlEncode : function( text )
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{
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var standard = function( text )
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{
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var span = new CKEDITOR.dom.element( 'span' );
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span.setText( text );
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return span.getHtml();
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};
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var fix1 = ( standard( '\n' ).toLowerCase() == '<br>' ) ?
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function( text )
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{
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// #3874 IE and Safari encode line-break into <br>
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return standard( text ).replace( /<br>/gi, '\n' );
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} :
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standard;
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var fix2 = ( standard( '>' ) == '>' ) ?
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function( text )
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{
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// WebKit does't encode the ">" character, which makes sense, but
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// it's different than other browsers.
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return fix1( text ).replace( />/g, '>' );
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} :
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fix1;
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var fix3 = ( standard( ' ' ) == ' ' ) ?
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function( text )
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{
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// #3785 IE8 changes spaces (>= 2) to
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return fix2( text ).replace( / /g, ' ' );
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} :
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fix2;
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this.htmlEncode = fix3;
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return this.htmlEncode( text );
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},
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/**
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* Replace special HTML characters in HTMLElement's attribute with their relative HTML entity values.
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* @param {String} The attribute's value to be encoded.
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* @returns {String} The encode value.
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* @example
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* element.setAttribute( 'title', '<a " b >' );
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* alert( CKEDITOR.tools.htmlEncodeAttr( element.getAttribute( 'title' ) ); // ">a " b <"
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*/
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htmlEncodeAttr : function( text )
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{
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return text.replace( /"/g, '"' ).replace( /</g, '<' ).replace( />/g, '>' );
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},
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/**
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* Gets a unique number for this CKEDITOR execution session. It returns
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* progressive numbers starting at 1.
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* @function
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* @returns {Number} A unique number.
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* @example
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* alert( CKEDITOR.tools.<b>getNextNumber()</b> ); // "1" (e.g.)
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* alert( CKEDITOR.tools.<b>getNextNumber()</b> ); // "2"
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*/
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getNextNumber : (function()
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{
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var last = 0;
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return function()
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{
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return ++last;
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};
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})(),
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/**
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* Gets a unique ID for CKEditor's interface elements. It returns a
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* string with the "cke_" prefix and a progressive number.
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* @function
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* @returns {String} A unique ID.
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* @example
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* alert( CKEDITOR.tools.<b>getNextId()</b> ); // "cke_1" (e.g.)
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* alert( CKEDITOR.tools.<b>getNextId()</b> ); // "cke_2"
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*/
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getNextId : function()
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{
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return 'cke_' + this.getNextNumber();
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},
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/**
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* Creates a function override.
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* @param {Function} originalFunction The function to be overridden.
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* @param {Function} functionBuilder A function that returns the new
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* function. The original function reference will be passed to this
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* function.
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* @returns {Function} The new function.
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* @example
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* var example =
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* {
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* myFunction : function( name )
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* {
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* alert( 'Name: ' + name );
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* }
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* };
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*
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* example.myFunction = CKEDITOR.tools.override( example.myFunction, function( myFunctionOriginal )
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* {
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* return function( name )
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* {
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* alert( 'Override Name: ' + name );
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* myFunctionOriginal.call( this, name );
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* };
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* });
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*/
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override : function( originalFunction, functionBuilder )
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{
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return functionBuilder( originalFunction );
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},
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/**
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* Executes a function after specified delay.
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* @param {Function} func The function to be executed.
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* @param {Number} [milliseconds] The amount of time (millisecods) to wait
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* to fire the function execution. Defaults to zero.
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* @param {Object} [scope] The object to hold the function execution scope
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* (the "this" object). By default the "window" object.
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* @param {Object|Array} [args] A single object, or an array of objects, to
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* pass as arguments to the function.
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* @param {Object} [ownerWindow] The window that will be used to set the
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* timeout. By default the current "window".
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* @returns {Object} A value that can be used to cancel the function execution.
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* @example
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* CKEDITOR.tools.<b>setTimeout(
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* function()
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* {
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* alert( 'Executed after 2 seconds' );
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* },
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* 2000 )</b>;
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*/
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setTimeout : function( func, milliseconds, scope, args, ownerWindow )
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{
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if ( !ownerWindow )
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ownerWindow = window;
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if ( !scope )
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scope = ownerWindow;
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return ownerWindow.setTimeout(
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function()
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{
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if ( args )
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func.apply( scope, [].concat( args ) ) ;
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else
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func.apply( scope ) ;
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},
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milliseconds || 0 );
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},
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/**
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* Remove spaces from the start and the end of a string. The following
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* characters are removed: space, tab, line break, line feed.
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* @function
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* @param {String} str The text from which remove the spaces.
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* @returns {String} The modified string without the boundary spaces.
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* @example
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* alert( CKEDITOR.tools.trim( ' example ' ); // "example"
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*/
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trim : (function()
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{
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// We are not using \s because we don't want "non-breaking spaces" to be caught.
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var trimRegex = /(?:^[ \t\n\r]+)|(?:[ \t\n\r]+$)/g;
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return function( str )
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{
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return str.replace( trimRegex, '' ) ;
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};
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})(),
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/**
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* Remove spaces from the start (left) of a string. The following
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* characters are removed: space, tab, line break, line feed.
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* @function
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* @param {String} str The text from which remove the spaces.
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* @returns {String} The modified string excluding the removed spaces.
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* @example
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* alert( CKEDITOR.tools.ltrim( ' example ' ); // "example "
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*/
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ltrim : (function()
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{
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// We are not using \s because we don't want "non-breaking spaces" to be caught.
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var trimRegex = /^[ \t\n\r]+/g;
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return function( str )
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{
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return str.replace( trimRegex, '' ) ;
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};
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})(),
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/**
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* Remove spaces from the end (right) of a string. The following
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* characters are removed: space, tab, line break, line feed.
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* @function
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* @param {String} str The text from which remove the spaces.
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* @returns {String} The modified string excluding the removed spaces.
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* @example
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* alert( CKEDITOR.tools.ltrim( ' example ' ); // " example"
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*/
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rtrim : (function()
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{
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// We are not using \s because we don't want "non-breaking spaces" to be caught.
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var trimRegex = /[ \t\n\r]+$/g;
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return function( str )
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{
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return str.replace( trimRegex, '' ) ;
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};
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})(),
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/**
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* Returns the index of an element in an array.
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* @param {Array} array The array to be searched.
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* @param {Object} entry The element to be found.
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* @returns {Number} The (zero based) index of the first entry that matches
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* the entry, or -1 if not found.
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* @example
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* var letters = [ 'a', 'b', 0, 'c', false ];
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* alert( CKEDITOR.tools.indexOf( letters, '0' ) ); "-1" because 0 !== '0'
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* alert( CKEDITOR.tools.indexOf( letters, false ) ); "4" because 0 !== false
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*/
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indexOf :
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// #2514: We should try to use Array.indexOf if it does exist.
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( Array.prototype.indexOf ) ?
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function( array, entry )
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{
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return array.indexOf( entry );
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}
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:
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function( array, entry )
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{
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for ( var i = 0, len = array.length ; i < len ; i++ )
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{
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if ( array[ i ] === entry )
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return i;
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}
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return -1;
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},
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/**
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* Creates a function that will always execute in the context of a
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* specified object.
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* @param {Function} func The function to be executed.
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* @param {Object} obj The object to which bind the execution context.
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* @returns {Function} The function that can be used to execute the
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* "func" function in the context of "obj".
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* @example
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* var obj = { text : 'My Object' };
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*
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* function alertText()
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* {
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* alert( this.text );
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* }
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*
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* var newFunc = <b>CKEDITOR.tools.bind( alertText, obj )</b>;
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* newFunc(); // Alerts "My Object".
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*/
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bind : function( func, obj )
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{
|
|
return function() { return func.apply( obj, arguments ); };
|
|
},
|
|
|
|
/**
|
|
* Class creation based on prototype inheritance, with supports of the
|
|
* following features:
|
|
* <ul>
|
|
* <li> Static fields </li>
|
|
* <li> Private fields </li>
|
|
* <li> Public (prototype) fields </li>
|
|
* <li> Chainable base class constructor </li>
|
|
* </ul>
|
|
* @param {Object} definition The class definition object.
|
|
* @returns {Function} A class-like JavaScript function.
|
|
*/
|
|
createClass : function( definition )
|
|
{
|
|
var $ = definition.$,
|
|
baseClass = definition.base,
|
|
privates = definition.privates || definition._,
|
|
proto = definition.proto,
|
|
statics = definition.statics;
|
|
|
|
if ( privates )
|
|
{
|
|
var originalConstructor = $;
|
|
$ = function()
|
|
{
|
|
// Create (and get) the private namespace.
|
|
var _ = this._ || ( this._ = {} );
|
|
|
|
// Make some magic so "this" will refer to the main
|
|
// instance when coding private functions.
|
|
for ( var privateName in privates )
|
|
{
|
|
var priv = privates[ privateName ];
|
|
|
|
_[ privateName ] =
|
|
( typeof priv == 'function' ) ? CKEDITOR.tools.bind( priv, this ) : priv;
|
|
}
|
|
|
|
originalConstructor.apply( this, arguments );
|
|
};
|
|
}
|
|
|
|
if ( baseClass )
|
|
{
|
|
$.prototype = this.prototypedCopy( baseClass.prototype );
|
|
$.prototype.constructor = $;
|
|
$.prototype.base = function()
|
|
{
|
|
this.base = baseClass.prototype.base;
|
|
baseClass.apply( this, arguments );
|
|
this.base = arguments.callee;
|
|
};
|
|
}
|
|
|
|
if ( proto )
|
|
this.extend( $.prototype, proto, true );
|
|
|
|
if ( statics )
|
|
this.extend( $, statics, true );
|
|
|
|
return $;
|
|
},
|
|
|
|
/**
|
|
* Creates a function reference that can be called later using
|
|
* CKEDITOR.tools.callFunction. This approach is specially useful to
|
|
* make DOM attribute function calls to JavaScript defined functions.
|
|
* @param {Function} fn The function to be executed on call.
|
|
* @param {Object} [scope] The object to have the context on "fn" execution.
|
|
* @returns {Number} A unique reference to be used in conjuction with
|
|
* CKEDITOR.tools.callFunction.
|
|
* @example
|
|
* var ref = <b>CKEDITOR.tools.addFunction</b>(
|
|
* function()
|
|
* {
|
|
* alert( 'Hello!');
|
|
* });
|
|
* CKEDITOR.tools.callFunction( ref ); // Hello!
|
|
*/
|
|
addFunction : function( fn, scope )
|
|
{
|
|
return functions.push( function()
|
|
{
|
|
return fn.apply( scope || this, arguments );
|
|
}) - 1;
|
|
},
|
|
|
|
/**
|
|
* Removes the function reference created with {@see CKEDITOR.tools.addFunction}.
|
|
* @param {Number} ref The function reference created with
|
|
* CKEDITOR.tools.addFunction.
|
|
*/
|
|
removeFunction : function( ref )
|
|
{
|
|
functions[ ref ] = null;
|
|
},
|
|
|
|
/**
|
|
* Executes a function based on the reference created with
|
|
* CKEDITOR.tools.addFunction.
|
|
* @param {Number} ref The function reference created with
|
|
* CKEDITOR.tools.addFunction.
|
|
* @param {[Any,[Any,...]} params Any number of parameters to be passed
|
|
* to the executed function.
|
|
* @returns {Any} The return value of the function.
|
|
* @example
|
|
* var ref = CKEDITOR.tools.addFunction(
|
|
* function()
|
|
* {
|
|
* alert( 'Hello!');
|
|
* });
|
|
* <b>CKEDITOR.tools.callFunction( ref )</b>; // Hello!
|
|
*/
|
|
callFunction : function( ref )
|
|
{
|
|
var fn = functions[ ref ];
|
|
return fn && fn.apply( window, Array.prototype.slice.call( arguments, 1 ) );
|
|
},
|
|
|
|
/**
|
|
* Append the 'px' length unit to the size if it's missing.
|
|
* @param length
|
|
*/
|
|
cssLength : (function()
|
|
{
|
|
var decimalRegex = /^\d+(?:\.\d+)?$/;
|
|
return function( length )
|
|
{
|
|
return length + ( decimalRegex.test( length ) ? 'px' : '' );
|
|
};
|
|
})(),
|
|
|
|
/**
|
|
* String specified by {@param str} repeats {@param times} times.
|
|
* @param str
|
|
* @param times
|
|
*/
|
|
repeat : function( str, times )
|
|
{
|
|
return new Array( times + 1 ).join( str );
|
|
},
|
|
|
|
/**
|
|
* Return the first successfully executed function's return value that
|
|
* doesn't throw any exception.
|
|
*/
|
|
tryThese : function()
|
|
{
|
|
var returnValue;
|
|
for ( var i = 0, length = arguments.length; i < length; i++ )
|
|
{
|
|
var lambda = arguments[i];
|
|
try
|
|
{
|
|
returnValue = lambda();
|
|
break;
|
|
}
|
|
catch (e) {}
|
|
}
|
|
return returnValue;
|
|
},
|
|
|
|
/**
|
|
* Generate a combined key from a series of params.
|
|
* @param {String} subKey One or more string used as sub keys.
|
|
* @example
|
|
* var key = CKEDITOR.tools.genKey( 'key1', 'key2', 'key3' );
|
|
* alert( key ); // "key1-key2-key3".
|
|
*/
|
|
genKey : function()
|
|
{
|
|
return Array.prototype.slice.call( arguments ).join( '-' );
|
|
}
|
|
};
|
|
})();
|
|
|
|
// PACKAGER_RENAME( CKEDITOR.tools )
|