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/*
 *  soapUI, copyright (C) 2004-2011 smartbear.com 
 *
 *  soapUI is free software; you can redistribute it and/or modify it under the 
 *  terms of version 2.1 of the GNU Lesser General Public License as published by 
 *  the Free Software Foundation.
 *
 *  soapUI is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without 
 *  even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 *  See the GNU Lesser General Public License for more details at gnu.org.
 */

package org.syntax.jedit.tokenmarker;

import javax.swing.text.Segment;

/**
 * Makefile token marker.
 * 
 * @author Slava Pestov
 * @version $Id: MakefileTokenMarker.java,v 1.18 1999/12/13 03:40:30 sp Exp $
 */
public class MakefileTokenMarker extends TokenMarker
{
	// public members
	public byte markTokensImpl( byte token, Segment line, int lineIndex )
	{
		char[] array = line.array;
		int offset = line.offset;
		int lastOffset = offset;
		int length = line.count + offset;
		boolean backslash = false;
		loop : for( int i = offset; i < length; i++ )
		{
			int i1 = ( i + 1 );

			char c = array[i];
			if( c == '\\' )
			{
				backslash = !backslash;
				continue;
			}

			switch( token )
			{
			case Token.NULL :
				switch( c )
				{
				case ':' :
				case '=' :
				case ' ' :
				case '\t' :
					backslash = false;
					if( lastOffset == offset )
					{
						addToken( i1 - lastOffset, Token.KEYWORD1 );
						lastOffset = i1;
					}
					break;
				case '#' :
					if( backslash )
						backslash = false;
					else
					{
						addToken( i - lastOffset, token );
						addToken( length - i, Token.COMMENT1 );
						lastOffset = length;
						break loop;
					}
					break;
				case '$' :
					if( backslash )
						backslash = false;
					else if( lastOffset != offset )
					{
						addToken( i - lastOffset, token );
						lastOffset = i;
						if( length - i > 1 )
						{
							char c1 = array[i1];
							if( c1 == '(' || c1 == '{' )
								token = Token.KEYWORD2;
							else
							{
								addToken( 2, Token.KEYWORD2 );
								lastOffset += 2;
								i++ ;
							}
						}
					}
					break;
				case '"' :
					if( backslash )
						backslash = false;
					else
					{
						addToken( i - lastOffset, token );
						token = Token.LITERAL1;
						lastOffset = i;
					}
					break;
				case '\'' :
					if( backslash )
						backslash = false;
					else
					{
						addToken( i - lastOffset, token );
						token = Token.LITERAL2;
						lastOffset = i;
					}
					break;
				default :
					backslash = false;
					break;
				}
			case Token.KEYWORD2 :
				backslash = false;
				if( c == ')' || c == '}' )
				{
					addToken( i1 - lastOffset, token );
					token = Token.NULL;
					lastOffset = i1;
				}
				break;
			case Token.LITERAL1 :
				if( backslash )
					backslash = false;
				else if( c == '"' )
				{
					addToken( i1 - lastOffset, token );
					token = Token.NULL;
					lastOffset = i1;
				}
				else
					backslash = false;
				break;
			case Token.LITERAL2 :
				if( backslash )
					backslash = false;
				else if( c == '\'' )
				{
					addToken( i1 - lastOffset, Token.LITERAL1 );
					token = Token.NULL;
					lastOffset = i1;
				}
				else
					backslash = false;
				break;
			}
		}
		switch( token )
		{
		case Token.KEYWORD2 :
			addToken( length - lastOffset, Token.INVALID );
			token = Token.NULL;
			break;
		case Token.LITERAL2 :
			addToken( length - lastOffset, Token.LITERAL1 );
			break;
		default :
			addToken( length - lastOffset, token );
			break;
		}
		return token;
	}
}