| /******************************************************************************* |
| * Copyright (c) 2006 Sybase, Inc. 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: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.dom; |
| |
| import org.w3c.dom.Node; |
| |
| /** |
| * @author mengbo |
| */ |
| public class DOMRange { |
| IDOMPosition _start; |
| |
| IDOMPosition _end; |
| |
| /** |
| * |
| */ |
| public DOMRange(IDOMPosition p1, IDOMPosition p2) { |
| _start = p1; |
| _end = p2; |
| } |
| |
| public IDOMPosition getStartPosition() { |
| return _start; |
| } |
| |
| public IDOMPosition getEndPosition() { |
| return _end; |
| } |
| |
| /** |
| * @return |
| */ |
| public boolean isEmpty() { |
| return _start.getContainerNode() == _end.getContainerNode() |
| && _start.getOffset() == _end.getOffset(); |
| } |
| |
| public boolean isOrdered() { |
| Node common = DOMUtil.findCommonAncester(_start.getContainerNode(), |
| _end.getContainerNode()); |
| if (common == null) { |
| return true; |
| } |
| IDOMPosition s = moveUp(_start, common); |
| IDOMPosition e = moveUp(_end, common); |
| return e.getOffset() >= s.getOffset(); |
| } |
| |
| private IDOMPosition moveUp(IDOMPosition p, Node ancester) { |
| while (p.getContainerNode() != ancester) { |
| p = new DOMRefPosition(p.getContainerNode(), false); |
| } |
| return p; |
| } |
| } |