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/*
Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
/**
* @fileOverview Defines the {@link CKEDITOR.dom.text} class, which represents
* a DOM text node.
*/
/**
* Represents a DOM text node.
* @constructor
* @augments CKEDITOR.dom.node
* @param {Object|String} text A native DOM text node or a string containing
* the text to use to create a new text node.
* @param {CKEDITOR.dom.document} [ownerDocument] The document that will contain
* the node in case of new node creation. Defaults to the current document.
* @example
* var nativeNode = document.createTextNode( 'Example' );
* var text = CKEDITOR.dom.text( nativeNode );
* @example
* var text = CKEDITOR.dom.text( 'Example' );
*/
CKEDITOR.dom.text = function( text, ownerDocument )
{
if ( typeof text == 'string' )
text = ( ownerDocument ? ownerDocument.$ : document ).createTextNode( text );
// Theoretically, we should call the base constructor here
// (not CKEDITOR.dom.node though). But, IE doesn't support expando
// properties on text node, so the features provided by domObject will not
// work for text nodes (which is not a big issue for us).
//
// CKEDITOR.dom.domObject.call( this, element );
/**
* The native DOM text node represented by this class instance.
* @type Object
* @example
* var element = new CKEDITOR.dom.text( 'Example' );
* alert( element.$.nodeType ); // "3"
*/
this.$ = text;
};
CKEDITOR.dom.text.prototype = new CKEDITOR.dom.node();
CKEDITOR.tools.extend( CKEDITOR.dom.text.prototype,
/** @lends CKEDITOR.dom.text.prototype */
{
/**
* The node type. This is a constant value set to
* {@link CKEDITOR.NODE_TEXT}.
* @type Number
* @example
*/
type : CKEDITOR.NODE_TEXT,
getLength : function()
{
return this.$.nodeValue.length;
},
getText : function()
{
return this.$.nodeValue;
},
/**
* Breaks this text node into two nodes at the specified offset,
* keeping both in the tree as siblings. This node then only contains
* all the content up to the offset point. A new text node, which is
* inserted as the next sibling of this node, contains all the content
* at and after the offset point. When the offset is equal to the
* length of this node, the new node has no data.
* @param {Number} The position at which to split, starting from zero.
* @returns {CKEDITOR.dom.text} The new text node.
*/
split : function( offset )
{
// If the offset is after the last char, IE creates the text node
// on split, but don't include it into the DOM. So, we have to do
// that manually here.
if ( CKEDITOR.env.ie && offset == this.getLength() )
{
var next = this.getDocument().createText( '' );
next.insertAfter( this );
return next;
}
var doc = this.getDocument();
var retval = new CKEDITOR.dom.text( this.$.splitText( offset ), doc );
// IE BUG: IE8 does not update the childNodes array in DOM after splitText(),
// we need to make some DOM changes to make it update. (#3436)
if ( CKEDITOR.env.ie8 )
{
var workaround = new CKEDITOR.dom.text( '', doc );
workaround.insertAfter( retval );
workaround.remove();
}
return retval;
},
/**
* Extracts characters from indexA up to but not including indexB.
* @param {Number} indexA An integer between 0 and one less than the
* length of the text.
* @param {Number} [indexB] An integer between 0 and the length of the
* string. If omitted, extracts characters to the end of the text.
*/
substring : function( indexA, indexB )
{
// We need the following check due to a Firefox bug
// https://bugzilla.mozilla.org/show_bug.cgi?id=458886
if ( typeof indexB != 'number' )
return this.$.nodeValue.substr( indexA );
else
return this.$.nodeValue.substring( indexA, indexB );
}
});