| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.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.jdt.ui.text.IJavaPartitions; |
| |
| |
| /** |
| * This scanner recognizes the JavaDoc comments and Java multi line comments. |
| */ |
| public class JavaPartitionScanner extends RuleBasedPartitionScanner implements IJavaPartitions { |
| |
| /** |
| * 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 JavaPartitionScanner() { |
| super(); |
| |
| IToken string= new Token(JAVA_STRING); |
| IToken character= new Token(JAVA_CHARACTER); |
| IToken javaDoc= new Token(JAVA_DOC); |
| IToken multiLineComment= new Token(JAVA_MULTI_LINE_COMMENT); |
| IToken singleLineComment= new Token(JAVA_SINGLE_LINE_COMMENT); |
| |
| List<IPredicateRule> rules= new ArrayList<>(); |
| |
| // Add rule for single line comments. |
| rules.add(new EndOfLineRule("//", singleLineComment)); //$NON-NLS-1$ |
| |
| // Add rule for strings. |
| rules.add(new SingleLineRule("\"", "\"", string, '\\')); //$NON-NLS-2$ //$NON-NLS-1$ |
| |
| // Add rule for character constants. |
| rules.add(new SingleLineRule("'", "'", character, '\\')); //$NON-NLS-2$ //$NON-NLS-1$ |
| |
| // Add special case word rule. |
| EmptyCommentRule wordRule= new EmptyCommentRule(multiLineComment); |
| rules.add(wordRule); |
| |
| // Add rules for multi-line comments and javadoc. |
| rules.add(new MultiLineRule("/**", "*/", javaDoc)); //$NON-NLS-1$ //$NON-NLS-2$ |
| rules.add(new MultiLineRule("/*", "*/", multiLineComment)); //$NON-NLS-1$ //$NON-NLS-2$ |
| |
| IPredicateRule[] result= new IPredicateRule[rules.size()]; |
| rules.toArray(result); |
| setPredicateRules(result); |
| } |
| } |