/* * SQLTokenMarker.java - Generic SQL token marker * Copyright (C) 1999 mike dillon * * You may use and modify this package for any purpose. Redistribution is * permitted, in both source and binary form, provided that this notice * remains intact in all source distributions of this package. */package org.syntax.jedit.tokenmarker;import org.syntax.jedit.*;import javax.swing.text.Segment;/** * SQL token marker. * * @author mike dillon * @version $Id: SQLTokenMarker.java,v 1.6 1999/04/19 05:38:20 sp Exp $ */public class SQLTokenMarker extends TokenMarker{	private int offset, lastOffset, lastKeyword, length;	// public members	public SQLTokenMarker(KeywordMap k)	{		this(k, false);	}	public SQLTokenMarker(KeywordMap k, boolean tsql)	{		keywords = k;		isTSQL = tsql;	}	public byte markTokensImpl(byte token, Segment line, int lineIndex)	{		offset = lastOffset = lastKeyword = line.offset;		length = line.count + offset;loop:		for(int i = offset; i < length; i++)		{			switch(line.array[i])			{			case '*':				if(token == Token.COMMENT1 && length - i >= 1 && line.array[i+1] == '/')				{					token = Token.NULL;					i++;					addToken((i + 1) - lastOffset,Token.COMMENT1);					lastOffset = i + 1;				}				else if (token == Token.NULL)				{					searchBack(line, i);					addToken(1,Token.OPERATOR);					lastOffset = i + 1;				}				break;			case '[':				if(token == Token.NULL)				{					searchBack(line, i);					token = Token.LITERAL1;					literalChar = '[';					lastOffset = i;				}				break;			case ']':				if(token == Token.LITERAL1 && literalChar == '[')				{					token = Token.NULL;					literalChar = 0;					addToken((i + 1) - lastOffset,Token.LITERAL1);					lastOffset = i + 1;				}				break;			case '.': case ',': case '(': case ')':				if (token == Token.NULL) {					searchBack(line, i);					addToken(1, Token.NULL);					lastOffset = i + 1;				}				break;			case '+': case '%': case '&': case '|': case '^':			case '~': case '<': case '>': case '=':				if (token == Token.NULL) {					searchBack(line, i);					addToken(1,Token.OPERATOR);					lastOffset = i + 1;				}				break;			case ' ': case '\t':				if (token == Token.NULL) {					searchBack(line, i, false);				}				break;			case ':':				if(token == Token.NULL)				{					addToken((i+1) - lastOffset,Token.LABEL);					lastOffset = i + 1;				}				break;			case '/':				if(token == Token.NULL)				{					if (length - i >= 2 && line.array[i + 1] == '*')					{						searchBack(line, i);						token = Token.COMMENT1;						lastOffset = i;						i++;					}					else					{						searchBack(line, i);						addToken(1,Token.OPERATOR);						lastOffset = i + 1;					}				}				break;			case '-':				if(token == Token.NULL)				{					if (length - i >= 2 && line.array[i+1] == '-')					{						searchBack(line, i);						addToken(length - i,Token.COMMENT1);						lastOffset = length;						break loop;					}					else					{						searchBack(line, i);						addToken(1,Token.OPERATOR);						lastOffset = i + 1;					}				}				break;			case '!':				if(isTSQL && token == Token.NULL && length - i >= 2 &&				(line.array[i+1] == '=' || line.array[i+1] == '<' || line.array[i+1] == '>'))				{					searchBack(line, i);					addToken(1,Token.OPERATOR);					lastOffset = i + 1;				}				break;			case '"': case '\'':				if(token == Token.NULL)				{					token = Token.LITERAL1;					literalChar = line.array[i];					addToken(i - lastOffset,Token.NULL);					lastOffset = i;				}				else if(token == Token.LITERAL1 && literalChar == line.array[i])				{					token = Token.NULL;					literalChar = 0;					addToken((i + 1) - lastOffset,Token.LITERAL1);					lastOffset = i + 1;				}				break;			default:				break;			}		}		if(token == Token.NULL)			searchBack(line, length, false);		if(lastOffset != length)			addToken(length - lastOffset,token);		return token;	}	// protected members	protected boolean isTSQL = false;	// private members	private KeywordMap keywords;	private char literalChar = 0;	private void searchBack(Segment line, int pos)	{		searchBack(line, pos, true);	}	private void searchBack(Segment line, int pos, boolean padNull)	{		int len = pos - lastKeyword;		byte id = keywords.lookup(line,lastKeyword,len);		if(id != Token.NULL)		{			if(lastKeyword != lastOffset)				addToken(lastKeyword - lastOffset,Token.NULL);			addToken(len,id);			lastOffset = pos;		}		lastKeyword = pos + 1;		if (padNull && lastOffset < pos)			addToken(pos - lastOffset, Token.NULL);	}}