VelocityStringScanner.java

package com.liferay.ide.velocity.vaulttec.ui.editor.text;

import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IWhitespaceDetector;
import org.eclipse.jface.text.rules.PatternRule;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WhitespaceRule;
import org.eclipse.jface.text.rules.WordPatternRule;

import com.liferay.ide.velocity.vaulttec.ui.IColorConstants;
import com.liferay.ide.velocity.vaulttec.ui.VelocityColorProvider;

/**
 * DOCUMENT ME!
 * 
 * @version $Revision: 7 $
 * @author <a href="mailto:akmal.sarhan@gmail.com">Akmal Sarhan </a>
 */
public class VelocityStringScanner extends RuleBasedScanner
{

    public VelocityStringScanner(VelocityColorProvider manager)
    {
        List rules = new ArrayList();
        // Add generic whitespace rule
        rules.add(new WhitespaceRule(new WhitespaceDetector()));
        // Add pattern rule for formal references
        Token token = (Token) manager.getToken(IColorConstants.STRING_REFERENCE);
        rules.add(new PatternRule("$!{", "}", token, (char) 0, true));
        rules.add(new PatternRule("${", "}", token, (char) 0, true));
        // Add pattern rule for shorthand references
        token = (Token) manager.getToken(IColorConstants.STRING_REFERENCE);
        rules.add(new WordPatternRule(new IdentifierDetector(), "$!", null, token));
        rules.add(new WordPatternRule(new IdentifierDetector(), "$", null, token));
        IRule[] result = new IRule[rules.size()];
        rules.toArray(result);
        setRules(result);
        setDefaultReturnToken(manager.getToken(IColorConstants.STRING));
    }

    private class WhitespaceDetector implements IWhitespaceDetector
    {

        public boolean isWhitespace(char aChar)
        {
            return ((aChar == ' ') || (aChar == '\t'));
        }
    }
}