Scavenger.java

/**
 *  Copyright 2011 Oliver Buchtala
 *
 *	This file is part of ndogen.
 *
 *  ndogen 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  ndogen 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 ndogen.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.ndogen.markdown;

import org.antlr.runtime.CharStream;
import org.antlr.runtime.CommonToken;
import org.antlr.runtime.RecognizerSharedState;

public class Scavenger extends CommonToken {

	private static final long serialVersionUID = 3198794931215932757L;
		
	public Scavenger(int type, CharStream input, RecognizerSharedState state) {
		this(type, input, state.tokenStartCharIndex, state.tokenStartLine, state.tokenStartCharPositionInLine);
	}
	
	public Scavenger(int type, CharStream input, int start, int line, int col) {
		super(input, type, DEFAULT_CHANNEL, start, start);
		super.line = line;
		super.charPositionInLine = col;
	}

	@Override
	public String getText() {
		// HACK: somehow this gets filled once to often
		return super.input.substring(super.start, super.stop-1);
	}
	
	public void append(int c) {
		// TODO: find out why this is called one time to often (i.e., with char that belongs to next token)
		super.stop++;
	}
	
	boolean isActive() {
		int index = input.index();
		return (index-1==getStopIndex());
	}
}