/*
 * ShellScriptTokenMarker.java - Shell script 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;

/**
 * Shell script token marker.
 *
 * @author Slava Pestov
 * @version $Id: ShellScriptTokenMarker.java,v 1.2 2002/03/26 18:21:01 tonyj Exp $
 */
public class ShellScriptTokenMarker extends TokenMarker
{
	// public members
	public static final byte LVARIABLE = Token.INTERNAL_FIRST;

	public byte markTokensImpl(byte token, Segment line, int lineIndex)
	{
		byte cmdState = 0; // 0 = space before command, 1 = inside
				// command, 2 = after command
		int offset = line.offset;
		int lastOffset = offset;
		int length = line.count + offset;

		if(token == Token.LITERAL1 && lineIndex != 0
			&& lineInfo[lineIndex - 1].obj != null)
		{
			String str = (String)lineInfo[lineIndex - 1].obj;
			if(str != null)
				System.out.println(str.length() + ":" + line.count);
			if(str != null && str.length() == line.count
				&& SyntaxUtilities.regionMatches(false,line,
				offset,str))
			{
				addToken(line.count,Token.LITERAL1);
				return Token.NULL;
			}
			else
			{
				addToken(line.count,Token.LITERAL1);
				lineInfo[lineIndex].obj = str;
				return Token.LITERAL1;
			}
		}

		boolean backslash = false;
loop:		for(int i = offset; i < length; i++)
		{
			char c = line.array[i];
			if(token == Token.KEYWORD2)
			{
				backslash = false;
				if(!Character.isLetterOrDigit(c) && c != '_')
				{
					token = Token.NULL;
					if(i != offset && line.array[i-1] == '$')
					{
						addToken((i+1) - lastOffset,
							Token.KEYWORD2);
						lastOffset = i + 1;
						continue;
					}
					else
					{
						addToken(i - lastOffset,
							Token.KEYWORD2);
						lastOffset = i;
					}
				}
			}
			else if(token == LVARIABLE && c == '}')
			{
				backslash = false;
				token = Token.NULL;
				addToken((i+1) - lastOffset,Token.KEYWORD2);
				lastOffset = i + 1;
			}
			switch(c)
			{
			case '\\':
				backslash = !backslash;
				break;
			case ' ': case '\t': case '(': case ')':
				backslash = false;
				if(token == Token.NULL && cmdState == 1/*insideCmd*/)
				{
					addToken(i - lastOffset,Token.KEYWORD1);
					lastOffset = i;
					cmdState = 2; /*afterCmd*/
				}
				break;
			case '=':
				backslash = false;
				if(token == Token.NULL && cmdState == 1/*insideCmd*/)
				{
					addToken(i - lastOffset,Token.NULL);
					lastOffset = i;
					cmdState = 2; /*afterCmd*/
				}
				break;
			case '&': case '|': case ';':
				if(backslash)
					backslash = false;
				else
					cmdState = 0; /*beforeCmd*/
				break;
			case '#':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					addToken(i - lastOffset,Token.NULL);
					addToken(length - i,Token.COMMENT1);
					lastOffset = length;
					break loop;
				}
				break;
			case '$':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					if(length - i >= 2)
					{
						switch(line.array[i+1])
						{
						case '(':
							continue;
						case '{':
							token = LVARIABLE;
							break;
						default:
							token = Token.KEYWORD2;
							break;
						}
					}
					else
						token = Token.KEYWORD2;
					addToken(i - lastOffset,Token.NULL);
					cmdState = 2; /*afterCmd*/
					lastOffset = i;
				}
				break;
			case '"':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					token = Token.LITERAL1;
					addToken(i - lastOffset,Token.NULL);
					cmdState = 2; /*afterCmd*/
					lastOffset = i;
				}
				else if(token == Token.LITERAL1)
				{
					token = Token.NULL;
					addToken((i+1) - lastOffset,Token.LITERAL1);
					cmdState = 2; /*afterCmd*/
					lastOffset = i + 1;
				}
				break;
			case '\'':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					token = Token.LITERAL2;
					addToken(i - lastOffset,Token.NULL);
					cmdState = 2; /*afterCmd*/
					lastOffset = i;
				}
				else if(token == Token.LITERAL2)
				{
					token = Token.NULL;
					addToken((i+1) - lastOffset,Token.LITERAL1);
					cmdState = 2; /*afterCmd*/
					lastOffset = i + 1;
				}
				break;
			case '<':
				if(backslash)
					backslash = false;
				else if(token == Token.NULL)
				{
					if(length - i > 1 && line.array[i+1] == '<')
					{
						addToken(i - lastOffset,
							Token.NULL);
						token = Token.LITERAL1;
						lastOffset = i;
						lineInfo[lineIndex].obj =
							new String(line.array,i + 2,
								length - (i+2));
					}
				}
				break;
			default:
				backslash = false;
				if(Character.isLetter(c))
				{
					if(cmdState == 0 /*beforeCmd*/)
					{
						addToken(i - lastOffset,token);
						lastOffset = i;
						cmdState++; /*insideCmd*/
					}
				}
				break;
			}
		}
		if(lastOffset != length)
		{
			if(token == Token.NULL && cmdState == 1)
				token = Token.KEYWORD1;
			addToken(length - lastOffset,token);
		}
		return (token == Token.LITERAL2 || token == Token.LITERAL1
			? token : Token.NULL);
	}
}

/*
 * ChangeLog:
 * $Log: ShellScriptTokenMarker.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 1.11  1999/04/27 06:53:38  sp
 * JARClassLoader updates, shell script token marker update, token marker compiles
 * now
 *
 * Revision 1.10  1999/04/22 06:03:26  sp
 * Syntax colorizing change
 *
 * Revision 1.9  1999/04/19 05:38:20  sp
 * Syntax API changes
 *
 * Revision 1.8  1999/03/12 23:51:00  sp
 * Console updates, uncomment removed cos it's too buggy, cvs log tags added
 *
 */