| /******************************************************************************* |
| * 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.propertiesfileeditor; |
| |
| import org.eclipse.jface.text.rules.ICharacterScanner; |
| import org.eclipse.jface.text.rules.IToken; |
| import org.eclipse.jface.text.rules.IWordDetector; |
| import org.eclipse.jface.text.rules.WordPatternRule; |
| |
| |
| /** |
| * A leading white space predicate rule. |
| * |
| * @since 3.1 |
| */ |
| public final class LeadingWhitespacePredicateRule extends WordPatternRule { |
| |
| |
| private static class DummyDetector implements IWordDetector { |
| |
| /* |
| * @see IWordDetector#isWordStart |
| */ |
| public boolean isWordStart(char c) { |
| return false; |
| } |
| |
| /* |
| * @see IWordDetector#isWordPart |
| */ |
| public boolean isWordPart(char c) { |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Creates a white space rule for the given <code>token</code>. |
| * |
| * @param token the token to be returned on success |
| */ |
| public LeadingWhitespacePredicateRule(IToken token, String whitespace) { |
| super(new DummyDetector(), whitespace, "dummy", token); //$NON-NLS-1$ |
| setColumnConstraint(0); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.rules.WordPatternRule#endSequenceDetected(org.eclipse.jface.text.rules.ICharacterScanner) |
| */ |
| @Override |
| protected boolean endSequenceDetected(ICharacterScanner scanner) { |
| int c; |
| do { |
| c= scanner.read(); |
| } while (Character.isWhitespace((char) c)); |
| |
| scanner.unread(); |
| |
| return true; |
| } |
| } |