source: trunk/admin/inc/FCKeditor/editor/_source/internals/fckcodeformatter.js@ 2

/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 *              http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 *              http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fckcodeformatter.js
 *      Format the HTML.
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

var FCKCodeFormatter = new Object() ;

FCKCodeFormatter.Init = function()
{
        var oRegex = this.Regex = new Object() ;

        // Regex for line breaks.
        oRegex.BlocksOpener = /\<(P|DIV|H1|H2|H3|H4|H5|H6|ADDRESS|PRE|OL|UL|LI|TITLE|META|LINK|BASE|SCRIPT|LINK|TD|TH|AREA|OPTION)[^\>]*\>/gi ;
        oRegex.BlocksCloser = /\<\/(P|DIV|H1|H2|H3|H4|H5|H6|ADDRESS|PRE|OL|UL|LI|TITLE|META|LINK|BASE|SCRIPT|LINK|TD|TH|AREA|OPTION)[^\>]*\>/gi ;

        oRegex.NewLineTags      = /\<(BR|HR)[^\>]*\>/gi ;

        oRegex.MainTags = /\<\/?(HTML|HEAD|BODY|FORM|TABLE|TBODY|THEAD|TR)[^\>]*\>/gi ;

        oRegex.LineSplitter = /\s*\n+\s*/g ;

        // Regex for indentation.
        oRegex.IncreaseIndent = /^\<(HTML|HEAD|BODY|FORM|TABLE|TBODY|THEAD|TR|UL|OL)[ \/\>]/i ;
        oRegex.DecreaseIndent = /^\<\/(HTML|HEAD|BODY|FORM|TABLE|TBODY|THEAD|TR|UL|OL)[ \>]/i ;
        oRegex.FormatIndentatorRemove = new RegExp( '^' + FCKConfig.FormatIndentator ) ;

        oRegex.ProtectedTags = /(<PRE[^>]*>)([\s\S]*?)(<\/PRE>)/gi ;
}

FCKCodeFormatter._ProtectData = function( outer, opener, data, closer )
{
        return opener + '___FCKpd___' + FCKCodeFormatter.ProtectedData.AddItem( data ) + closer ;
}

FCKCodeFormatter.Format = function( html )
{
        if ( !this.Regex )
                this.Init() ;

        // Protected content that remain untouched during the
        // process go in the following array.
        FCKCodeFormatter.ProtectedData = new Array() ;
        
        var sFormatted = html.replace( this.Regex.ProtectedTags, FCKCodeFormatter._ProtectData ) ;
        
        // Line breaks.
        sFormatted              = sFormatted.replace( this.Regex.BlocksOpener, '\n$&' ) ; ;
        sFormatted              = sFormatted.replace( this.Regex.BlocksCloser, '$&\n' ) ;
        sFormatted              = sFormatted.replace( this.Regex.NewLineTags, '$&\n' ) ;
        sFormatted              = sFormatted.replace( this.Regex.MainTags, '\n$&\n' ) ;

        // Indentation.
        var sIndentation = '' ;
        
        var asLines = sFormatted.split( this.Regex.LineSplitter ) ;
        sFormatted = '' ;
        
        for ( var i = 0 ; i < asLines.length ; i++ )
        {
                var sLine = asLines[i] ;
                
                if ( sLine.length == 0 )
                        continue ;
                
                if ( this.Regex.DecreaseIndent.test( sLine ) )
                        sIndentation = sIndentation.replace( this.Regex.FormatIndentatorRemove, '' ) ;

                sFormatted += sIndentation + sLine + '\n' ;
                
                if ( this.Regex.IncreaseIndent.test( sLine ) )
                        sIndentation += FCKConfig.FormatIndentator ;
        }
        
        // Now we put back the protected data.
        for ( var i = 0 ; i < FCKCodeFormatter.ProtectedData.length ; i++ )
        {
                var oRegex = new RegExp( '___FCKpd___' + i ) ;
                sFormatted = sFormatted.replace( oRegex, FCKCodeFormatter.ProtectedData[i].replace( /\$/g, '$$$$' ) ) ;
        }

        return sFormatted.trim() ;
}