/*
* JBoss by Red Hat
* Copyright 2006-2009, Red Hat Middleware, LLC, and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ide.eclipse.freemarker.target;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
import org.eclipse.jface.text.rules.IPredicateRule;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.Token;
import org.jboss.ide.eclipse.freemarker.util.RobustStack;
/**
* An implementation of {@link TargetPartitionScanner}.
*
* @author <a href="mailto:ppalaga@redhat.com">Peter Palaga</a>
* @since 1.4.0
*/
public class RuleBasedTargetPartitionScanner extends BufferedRuleBasedScanner implements TargetPartitionScanner {
private RobustStack<String> typeStack = new RobustStack<String>(null);
/**
* @see org.jboss.ide.eclipse.freemarker.target.TargetPartitionScanner#pushPartitionType(java.lang.String)
*/
@Override
public void pushPartitionType(String type) {
typeStack.push(type);
}
/**
* @see org.jboss.ide.eclipse.freemarker.target.TargetPartitionScanner#peekPartitionType()
*/
@Override
public String peekPartitionType() {
return typeStack.peek();
}
/**
* @see org.jboss.ide.eclipse.freemarker.target.TargetPartitionScanner#popPartitionType()
*/
@Override
public String popPartitionType() {
return typeStack.pop();
}
/**
* @see org.eclipse.jface.text.rules.RuleBasedScanner#nextToken()
*/
@Override
public IToken nextToken() {
if (fOffset >= fRangeEnd) {
return Token.EOF;
}
String contentType = peekPartitionType();
if (contentType == null || fRules == null) {
return super.nextToken();
}
fTokenOffset= fOffset;
fColumn= UNDEFINED;
IToken token;
for (IRule r : fRules) {
IPredicateRule rule = (IPredicateRule) r;
token= rule.getSuccessToken();
if (token.getData().equals(contentType)) {
token = rule.evaluate(this, true);
if (token.isEOF() || !token.isUndefined()) {
return token;
}
}
}
return super.nextToken();
}
/**
* @see org.eclipse.jface.text.rules.IPartitionTokenScanner#setPartialRange(org.eclipse.jface.text.IDocument, int, int, java.lang.String, int)
*/
@Override
public void setPartialRange(IDocument document, int offset, int length, String contentType, int partitionOffset) {
super.setRange(document, offset, length);
}
/**
* Sets the rules.
* @param rules the rules
*/
public void setPredicateRules(IPredicateRule[] rules) {
super.setRules(rules);
}
/**
* Always throws an {@link UnsupportedOperationException} use {@link #setPredicateRules(IPredicateRule[])} instead.
*/
@Override
public void setRules(IRule[] rules) {
throw new UnsupportedOperationException("Use setPredicateRules(IPredicateRule[]) rather than setRules(IRule[])."); //$NON-NLS-1$
}
}