TagRule.java

/*-
 * Copyright © 2009 Diamond Light Source Ltd.
 *
 * This file is part of GDA.
 *
 * GDA is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License version 3 as published by the Free
 * Software Foundation.
 *
 * GDA 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 GDA. If not, see <http://www.gnu.org/licenses/>.
 */

package uk.ac.gda.richbeans.editors.xml.bean;

import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.MultiLineRule;

/**
 * @author Matthew Gerring
 *
 */
public class TagRule extends MultiLineRule {

	/**
	 * @param token
	 */
	public TagRule(IToken token) {
		super("<", ">", token);
	}
	@Override
	protected boolean sequenceDetected(
		ICharacterScanner scanner,
		char[] sequence,
		boolean eofAllowed) {
		int c = scanner.read();
		if (sequence[0] == '<') {
			if (c == '?') {
				// processing instruction - abort
				scanner.unread();
				return false;
			}
			if (c == '!') {
				scanner.unread();
				// comment - abort
				return false;
			}
		} else if (sequence[0] == '>') {
			scanner.unread();
		}
		return super.sequenceDetected(scanner, sequence, eofAllowed);
	}
}