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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.examples.javaeditor;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.*;
/**
* This scanner recognizes the JavaDoc comments and Java multi line comments.
*/
public class JavaPartitionScanner extends RuleBasedPartitionScanner {
public final static String JAVA_MULTILINE_COMMENT= "__java_multiline_comment"; //$NON-NLS-1$
public final static String JAVA_DOC= "__java_javadoc"; //$NON-NLS-1$
public final static String[] JAVA_PARTITION_TYPES= new String[] { JAVA_MULTILINE_COMMENT, JAVA_DOC };
/**
* Detector for empty comments.
*/
static class EmptyCommentDetector implements IWordDetector {
/* (non-Javadoc)
* Method declared on IWordDetector
*/
public boolean isWordStart(char c) {
return (c == '/');
}
/* (non-Javadoc)
* Method declared on IWordDetector
*/
public boolean isWordPart(char c) {
return (c == '*' || c == '/');
}
}
/**
*
*/
static class WordPredicateRule extends WordRule implements IPredicateRule {
private IToken fSuccessToken;
public WordPredicateRule(IToken successToken) {
super(new EmptyCommentDetector());
fSuccessToken= successToken;
addWord("/**/", fSuccessToken); //$NON-NLS-1$
}
/*
* @see org.eclipse.jface.text.rules.IPredicateRule#evaluate(ICharacterScanner, boolean)
*/
public IToken evaluate(ICharacterScanner scanner, boolean resume) {
return super.evaluate(scanner);
}
/*
* @see org.eclipse.jface.text.rules.IPredicateRule#getSuccessToken()
*/
public IToken getSuccessToken() {
return fSuccessToken;
}
}
/**
* Creates the partitioner and sets up the appropriate rules.
*/
public JavaPartitionScanner() {
super();
IToken javaDoc= new Token(JAVA_DOC);
IToken comment= new Token(JAVA_MULTILINE_COMMENT);
List rules= new ArrayList();
// Add rule for single line comments.
rules.add(new EndOfLineRule("//", Token.UNDEFINED)); //$NON-NLS-1$
// Add rule for strings and character constants.
rules.add(new SingleLineRule("\"", "\"", Token.UNDEFINED, '\\')); //$NON-NLS-2$ //$NON-NLS-1$
rules.add(new SingleLineRule("'", "'", Token.UNDEFINED, '\\')); //$NON-NLS-2$ //$NON-NLS-1$
// Add special case word rule.
rules.add(new WordPredicateRule(comment));
// Add rules for multi-line comments and javadoc.
rules.add(new MultiLineRule("/**", "*/", javaDoc, (char) 0, true)); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(new MultiLineRule("/*", "*/", comment, (char) 0, true)); //$NON-NLS-1$ //$NON-NLS-2$
IPredicateRule[] result= new IPredicateRule[rules.size()];
rules.toArray(result);
setPredicateRules(result);
}
}
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