?/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2008 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Utility functions.
 */

var FCKTools = new Object() ;

FCKTools.CreateBogusBR = function( targetDocument )
{
	var eBR = targetDocument.createElement( 'br' ) ;
//	eBR.setAttribute( '_moz_editor_bogus_node', 'TRUE' ) ;
	eBR.setAttribute( 'type', '_moz' ) ;
	return eBR ;
}

/**
 * Fixes relative URL entries defined inside CSS styles by appending a prefix
 * to them.
 * @param (String) cssStyles The CSS styles definition possibly containing url()
 *		paths.
 * @param (String) urlFixPrefix The prefix to append to relative URLs.
 */
FCKTools.FixCssUrls = function( urlFixPrefix, cssStyles )
{
	if ( !urlFixPrefix || urlFixPrefix.length == 0 )
		return cssStyles ;

	return cssStyles.replace( /url\s*\(([\s'"]*)(.*?)([\s"']*)\)/g, function( match, opener, path, closer )
		{
			if ( /^\/|^\w?:/.test() )
				return match ;
			else
				return 'url(' + opener + urlFixPrefix + path + closer + ')' ;
		} ) ;
}

FCKTools._GetUrlFixedCss = function( cssStyles, urlFixPrefix )
{
	var match = cssStyles.match( /^([^|]+)\|([\s\S]*)/ ) ;

	if ( match )
		return FCKTools.FixCssUrls( match[1], match[2] ) ;
	else
		return cssStyles ;
}

/**
 * Appends a <link css> or <style> element to the document.
 * @param (Object) documentElement The DOM document object to which append the
 *		stylesheet.
 * @param (Variant) cssFileOrDef A String pointing to the CSS file URL or an
 *		Array with many CSS file URLs or the CSS definitions for the <style>
 *		element.
 * @return {Array} An array containing all elements created in the target
 *		document. It may include <link> or <style> elements, depending on the
 *		value passed with cssFileOrDef.
 */
FCKTools.AppendStyleSheet = function( domDocument, cssFileOrArrayOrDef )
{
	if ( !cssFileOrArrayOrDef )
		return [] ;

	if ( typeof( cssFileOrArrayOrDef ) == 'string' )
	{
		// Test if the passed argument is an URL.
		if ( /[\\\/\.]\w*$/.test( cssFileOrArrayOrDef ) )
		{
			// The string may have several URLs separated by comma.
			return this.AppendStyleSheet( domDocument, cssFileOrArrayOrDef.split(',') ) ;
		}
		else
			return [ this.AppendStyleString( domDocument, FCKTools._GetUrlFixedCss( cssFileOrArrayOrDef ) ) ] ;
	}
	else
	{
		var styles = [] ;
		for ( var i = 0 ; i < cssFileOrArrayOrDef.length ; i++ )
			styles.push( this._AppendStyleSheet( domDocument, cssFileOrArrayOrDef[i] ) ) ;
		return styles ;
	}
}

FCKTools.GetStyleHtml = (function()
{
	var getStyle = function( styleDef, markTemp )
	{
		if ( styleDef.length == 0 )
			return '' ;

		var temp = markTemp ? ' _fcktemp="true"' : '' ;
		return '<' + 'style type="text/css"' + temp + '>' + styleDef + '<' + '/style>' ;
	}

	var getLink = function( cssFileUrl, markTemp )
	{
		if ( cssFileUrl.length == 0 )
			return '' ;

		var temp = markTemp ? ' _fcktemp="true"' : '' ;
		return '<' + 'link href="' + cssFileUrl + '" type="text/css" rel="stylesheet" ' + temp + '/>' ;
	}

	return function( cssFileOrArrayOrDef, markTemp )
	{
		if ( !cssFileOrArrayOrDef )
			return '' ;

		if ( typeof( cssFileOrArrayOrDef ) == 'string' )
		{
			// Test if the passed argument is an URL.
			if ( /[\\\/\.]\w*$/.test( cssFileOrArrayOrDef ) )
			{
				// The string may have several URLs separated by comma.
				return this.GetStyleHtml( cssFileOrArrayOrDef.split(',') ) ;
			}
			else
				return getStyle( this._GetUrlFixedCss( cssFileOrArrayOrDef ), markTemp ) ;
		}
		else
		{
			var html = '' ;

			for ( var i = 0 ; i < cssFileOrArrayOrDef.length ; i++ )
				html += getLink( cssFileOrArrayOrDef[i], markTemp ) ;

			return html ;
		}
	}
})() ;

FCKTools.GetElementDocument = function ( element )
{
	return element.ownerDocument || element.document ;
}

// Get the window object where the element is placed in.
FCKTools.GetElementWindow = function( element )
{
	return this.GetDocumentWindow( this.GetElementDocument( element ) ) ;
}

FCKTools.GetDocumentWindow = function( document )
{
	// With Safari, there is not way to retrieve the window from the document, so we must fix it.
	if ( FCKBrowserInfo.IsSafari && !document.parentWindow )
		this.FixDocumentParentWindow( window.top ) ;

	return document.parentWindow || document.defaultView ;
}

/*
	This is a Safari specific function that fix the reference to the parent
	window from the document object.
*/
FCKTools.FixDocumentParentWindow = function( targetWindow )
{
	if ( targetWindow.document )
		targetWindow.document.parentWindow = targetWindow ;

	for ( var i = 0 ; i < targetWindow.frames.length ; i++ )
		FCKTools.FixDocumentParentWindow( targetWindow.frames[i] ) ;
}

FCKTools.HTMLEncode = function( text )
{
	if ( !text )
		return '' ;

	text = text.replace( /&/g, '&amp;' ) ;
	text = text.replace( /</g, '&lt;' ) ;
	text = text.replace( />/g, '&gt;' ) ;

	return text ;
}

FCKTools.HTMLDecode = function( text )
{
	if ( !text )
		return '' ;

	text = text.replace( /&gt;/g, '>' ) ;
	text = text.replace( /&lt;/g, '<' ) ;
	text = text.replace( /&amp;/g, '&' ) ;

	return text ;
}

FCKTools._ProcessLineBreaksForPMode = function( oEditor, text, liState, node, strArray )
{
	var closeState = 0 ;
	var blockStartTag = "<p>" ;
	var blockEndTag = "</p>" ;
	var lineBreakTag = "<br />" ;
	if ( liState )
	{
		blockStartTag = "<li>" ;
		blockEndTag = "</li>" ;
		closeState = 1 ;
	}

	// Are we currently inside a <p> tag now?
	// If yes, close it at the next double line break.
	while ( node && node != oEditor.FCK.EditorDocument.body )
	{
		if ( node.tagName.toLowerCase() == 'p' )
		{
			closeState = 1 ;
			break;
		}
		node = node.parentNode ;
	}

	for ( var i = 0 ; i < text.length ; i++ )
	{
		var c = text.charAt( i ) ;
		if ( c == '\r' )
			continue ;

		if ( c != '\n' )
		{
			strArray.push( c ) ;
			continue ;
		}

		// Now we have encountered a line break.
		// Check if the next character is also a line break.
		var n = text.charAt( i + 1 ) ;
		if ( n == '\r' )
		{
			i++ ;
			n = text.charAt( i + 1 ) ;
		}
		if ( n == '\n' )
		{
			i++ ;	// ignore next character - we have already processed it.
			if ( closeState )
				strArray.push( blockEndTag ) ;
			strArray.push( blockStartTag ) ;
			closeState = 1 ;
		}
		else
			strArray.push( lineBreakTag ) ;
	}
}

FCKTools._ProcessLineBreaksForDivMode = function( oEditor, text, liState, node, strArray )
{
	var closeState = 0 ;
	var blockStartTag = "<div>" ;
	var blockEndTag = "</div>" ;
	if ( liState )
	{
		blockStartTag = "<li>" ;
		blockEndTag = "</li>" ;
		closeState = 1 ;
	}

	// Are we currently inside a <div> tag now?
	// If yes, close it at the next double line break.
	while ( node && node != oEditor.FCK.EditorDocument.body )
	{
		if ( node.tagName.toLowerCase() == 'div' )
		{
			closeState = 1 ;
			break ;
		}
		node = node.parentNode ;
	}

	for ( var i = 0 ; i < text.length ; i++ )
	{
		var c = text.charAt( i ) ;
		if ( c == '\r' )
			continue ;

		if ( c != '\n' )
		{
			strArray.push( c ) ;
			continue ;
		}

		if ( closeState )
		{
			if ( strArray[ strArray.length - 1 ] == blockStartTag )
			{
				// A div tag must have some contents inside for it to be visible.
				strArray.push( "&nbsp;" ) ;
			}
			strArray.push( blockEndTag ) ;
		}
		strArray.push( blockStartTag ) ;
		closeState = 1 ;
	}
	if ( closeState )
		strArray.push( blockEndTag ) ;
}

FCKTools._ProcessLineBreaksForBrMode = function( oEditor, text, liState, node, strArray )
{
	var closeState = 0 ;
	var blockStartTag = "<br />" ;
	var blockEndTag = "" ;
	if ( liState )
	{
		blockStartTag = "<li>" ;
		blockEndTag = "</li>" ;
		closeState = 1 ;
	}

	for ( var i = 0 ; i < text.length ; i++ )
	{
		var c = text.charAt( i ) ;
		if ( c == '\r' )
			continue ;

		if ( c != '\n' )
		{
			strArray.push( c ) ;
			continue ;
		}

		if ( closeState && blockEndTag.length )
			strArray.push ( blockEndTag ) ;
		strArray.push( blockStartTag ) ;
		closeState = 1 ;
	}
}

FCKTools.ProcessLineBreaks = function( oEditor, oConfig, text )
{
	var enterMode = oConfig.EnterMode.toLowerCase() ;
	var strArray = [] ;

	// Is the caret or selection inside an <li> tag now?
	var liState = 0 ;
	var range = new oEditor.FCKDomRange( oEditor.FCK.EditorWindow ) ;
	range.MoveToSelection() ;
	var node = range._Range.startContainer ;
	while ( node && node.nodeType != 1 )
		node = node.parentNode ;
	if ( node && node.tagName.toLowerCase() == 'li' )
		liState = 1 ;

	if ( enterMode == 'p' )
		this._ProcessLineBreaksForPMode( oEditor, text, liState, node, strArray ) ;
	else if ( enterMode == 'div' )
		this._ProcessLineBreaksForDivMode( oEditor, text, liState, node, strArray ) ;
	else if ( enterMode == 'br' )
		this._ProcessLineBreaksForBrMode( oEditor, text, liState, node, strArray ) ;
	return strArray.join( "" ) ;
}

/**