/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* QNX Software System
*******************************************************************************/
package org.eclipse.cdt.ui.tests.text;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.EndOfLineRule;
import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IPredicateRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.IWordDetector;
import org.eclipse.jface.text.rules.MultiLineRule;
import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;
import org.eclipse.jface.text.rules.SingleLineRule;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WordRule;
import org.eclipse.cdt.ui.text.ICPartitions;
/**
* This scanner is not actually use in the code it was relace by
* FastCPartitionScanner which was faster. We keep this around
* as a reference.
*/
public class CPartitionScanner extends RuleBasedPartitionScanner implements ICPartitions {
/**
* Detector for empty comments.
*/
static class EmptyCommentDetector implements IWordDetector {
/*
* @see IWordDetector#isWordStart
*/
@Override
public boolean isWordStart(char c) {
return (c == '/');
}
/*
* @see IWordDetector#isWordPart
*/
@Override
public boolean isWordPart(char c) {
return (c == '*' || c == '/');
}
}
/**
* Word rule for empty comments.
*/
static class EmptyCommentRule extends WordRule implements IPredicateRule {
private IToken fSuccessToken;
/**
* Constructor for EmptyCommentRule.
* @param successToken
*/
public EmptyCommentRule(IToken successToken) {
super(new EmptyCommentDetector());
fSuccessToken= successToken;
addWord("/**/", fSuccessToken); //$NON-NLS-1$
}
/*
* @see IPredicateRule#evaluate(ICharacterScanner, boolean)
*/
@Override
public IToken evaluate(ICharacterScanner scanner, boolean resume) {
return evaluate(scanner);
}
/*
* @see IPredicateRule#getSuccessToken()
*/
@Override
public IToken getSuccessToken() {
return fSuccessToken;
}
}
/**
* Creates the partitioner and sets up the appropriate rules.
*/
public CPartitionScanner() {
super();
IToken comment= new Token(C_MULTI_LINE_COMMENT);
IToken single_comment= new Token(C_SINGLE_LINE_COMMENT);
IToken string= new Token(C_STRING);
IToken character = new Token(C_CHARACTER);
List<IPredicateRule> rules= new ArrayList<IPredicateRule>();
// Minimize the number of rules, since we have duplicate rules
// in the CCodeScanner...
// Add rule for single line comments.
rules.add(new EndOfLineRule("//", single_comment, '\\', true)); //$NON-NLS-1$
// Add rule for string constants.
rules.add(new SingleLineRule("\"", "\"", string, '\\', false, true)); //$NON-NLS-1$ //$NON-NLS-2$
// Add rule for character constants
rules.add(new SingleLineRule("'", "'", character, '\\')); //$NON-NLS-1$ //$NON-NLS-2$
// Add special case word rule.
EmptyCommentRule wordRule= new EmptyCommentRule(comment);
rules.add(wordRule);
// Add rules for multi-line comments.
rules.add(new MultiLineRule("/*", "*/", comment)); //$NON-NLS-1$ //$NON-NLS-2$
IPredicateRule[] result= new IPredicateRule[rules.size()];
rules.toArray(result);
setPredicateRules(result);
}
}