/*
 * MakefileTokenMarker.java - Makefile token marker
 * Copyright (C) 1998, 1999 Slava Pestov
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.gjt.sp.jedit.syntax;

import javax.swing.text.Segment;

/**
 * Makefile token marker.
 *
 * @author Slava Pestov
 * @version $Id: MakefileTokenMarker.java,v 1.2 2002/03/26 18:21:01 tonyj Exp $
 */
public class MakefileTokenMarker extends TokenMarker
{
	// public members
	public byte markTokensImpl(byte token, Segment line, int lineIndex)
	{
		int offset = line.offset;
		int lastOffset = offset;
		int length = line.count + offset;
		boolean backslash = false;
loop:		for(int i = offset; i < length; i++)
		{
			switch(line.array[i])
			{
			case '\\':
				backslash = !backslash;
				break;
			case ':': case '=': case ' ':
				backslash = false;
				if(token == Token.NULL && lastOffset == offset)
				{
					addToken((i+1) - lastOffset,Token.KEYWORD1);
					lastOffset = i + 1;
				}
				break;
			case '\t':
				// silly hack
				backslash = false;
				if(token == Token.NULL && lastOffset == offset)
				{
					addToken((i+1) - lastOffset,Token.NULL);
					lastOffset = i + 1;
				}
				break;
			case '#':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					addToken(i - lastOffset,Token.NULL);
					addToken(length - i,Token.COMMENT1);
					lastOffset = length;
					break loop;
				}
				break;
			case '$':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL && lastOffset != offset)
				{
					addToken(i - lastOffset,Token.NULL);
					lastOffset = i;
					if(length - i > 1)
	 				{
						char c = line.array[i + 1];
				      		if(c == '(' || c == '{')
							token = Token.KEYWORD2;
						else
						{
							addToken(2,Token.KEYWORD2);
							lastOffset += 2;
							i++;
						}
					}
				}
				break;
			case ')': case '}':
				backslash = false;
				if(token == Token.KEYWORD2)
				{
					token = Token.NULL;
					addToken((i+1) - lastOffset,Token.KEYWORD2);
					lastOffset = i + 1;
				}
				break;
			case '"':
				if(backslash)
				{
					backslash = false;
					break;
				}
				if(token == Token.NULL)
				{
					token = Token.LITERAL1;
					addToken(i - lastOffset,Token.NULL);
					lastOffset = i;
				}
				else if(token == Token.LITERAL1)
				{
					token = Token.NULL;
					addToken((i+1) - lastOffset,Token.LITERAL1);
					lastOffset = i + 1;
				}
				break;
			case '\'':
				if(backslash)
				{
					backslash = false;
					break;
				}
				if(token == Token.NULL)
				{
					token = Token.LITERAL2;
					addToken(i - lastOffset,Token.NULL);
					lastOffset = i;
				}
				else if(token == Token.LITERAL2)
				{
					token = Token.NULL;
					addToken((i+1) - lastOffset,Token.LITERAL1);
					lastOffset = i + 1;
				}
				break;
			default:
				backslash = false;
				break;
			}
		}
		if(lastOffset != length)
		{
			if(token != Token.NULL && token != Token.KEYWORD2)
			{
				addToken(length - lastOffset,Token.INVALID);
				token = Token.NULL;
			}
			else
			{
				addToken(length - lastOffset,lastOffset == offset ?
					 Token.KEYWORD1 : token);
			}
		}
		return (token == Token.LITERAL1 || token == Token.LITERAL2 ?
			token : Token.NULL);
	}
}
/*
 * ChangeLog:
 * $Log: MakefileTokenMarker.java,v $
 * Revision 1.2  2002/03/26 18:21:01  tonyj
 * Remove spurious carriage returns
 *
 * Revision 1.1.1.1  1999/10/21 01:48:13  tonyj
 * Initial import from SourceSafe
 *
 * Revision 1.13  1999/04/22 06:03:26  sp
 * Syntax colorizing change
 *
 * Revision 1.12  1999/04/19 05:38:20  sp
 * Syntax API changes
 *
 * Revision 1.11  1999/03/13 00:09:07  sp
 * Console updates, uncomment removed cos it's too buggy, cvs log tags added
 *
 * Revision 1.10  1999/03/12 23:51:00  sp
 * Console updates, uncomment removed cos it's too buggy, cvs log tags added
 *
 */