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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;
+		},
+
+		setText : function( text )
+		{
+			this.$.nodeValue = text;
+		},
+
+		/**
+		 * Breaks this text node into two nodes at the specified offset,
+		 * keeping both in the tree as siblings. This node then only contains
+		 * all the content up to the offset point. A new text node, which is
+		 * inserted as the next sibling of this node, contains all the content
+		 * at and after the offset point. When the offset is equal to the
+		 * length of this node, the new node has no data.
+		 * @param {Number} The position at which to split, starting from zero.
+		 * @returns {CKEDITOR.dom.text} The new text node.
+		 */
+		split : function( offset )
+		{
+			// If the offset is after the last char, IE creates the text node
+			// on split, but don't include it into the DOM. So, we have to do
+			// that manually here.
+			if ( CKEDITOR.env.ie && offset == this.getLength() )
+			{
+				var next = this.getDocument().createText( '' );
+				next.insertAfter( this );
+				return next;
+			}
+
+			var doc = this.getDocument();
+			var retval = new CKEDITOR.dom.text( this.$.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 );
+		}
+	});