build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/internal/ui/text/makefile/MakefileSimpleMacroRule.java

/**********************************************************************
 * Copyright (c) 2002,2003 QNX Software Systems and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors: 
 * QNX Software Systems - Initial API and implementation
***********************************************************************/
package org.eclipse.cdt.make.internal.ui.text.makefile;

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

public class MakefileSimpleMacroRule extends PatternRule {

	private int nOfBrackets;

	public MakefileSimpleMacroRule(IToken token) {
		super("$(", ")", token, (char) 0, true); //$NON-NLS-1$ //$NON-NLS-2$
	}
	
	protected IToken doEvaluate(ICharacterScanner scanner, boolean resume) {
		nOfBrackets = 1;
		return super.doEvaluate(scanner, resume);
	}

	protected boolean endSequenceDetected(ICharacterScanner scanner) {
		int c;
		char[][] delimiters = scanner.getLegalLineDelimiters();
		while ((c = scanner.read()) != ICharacterScanner.EOF) {
			if ('(' == (char) c)
				++nOfBrackets;

			if (fEndSequence.length > 0 && c == fEndSequence[0]) {
				// Check if the specified end sequence has been found.
				if (sequenceDetected(scanner, fEndSequence, true)) {
					if (0 == --nOfBrackets)
						return true;
				}
			} else if (fBreaksOnEOL) {
				// Check for end of line since it can be used to terminate the pattern.
				for (int i = 0; i < delimiters.length; i++) {
					if (c == delimiters[i][0] && sequenceDetected(scanner, delimiters[i], false))
						return true;
				}
			}
		}
		scanner.unread();
		return true;
	}

}