| /******************************************************************************* |
| * 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; |
| import org.w3c.dom.NodeList; |
| |
| /** |
| * DOMRefPosition is another way to identify a position in the document tree. It |
| * has the advantage against the DOMPosition, that even something change in the |
| * document, DOMRefPosition may still reference the correct position. |
| * |
| * @author mengbo |
| */ |
| public class DOMRefPosition implements IDOMRefPosition { |
| Node _refNode; |
| |
| boolean _forward; |
| |
| /** |
| * @param refNode |
| * @param forward |
| * true means the position after refNode. false means the |
| * position before refNode |
| */ |
| public DOMRefPosition(Node refNode, boolean forward) { |
| _refNode = refNode; |
| _forward = forward; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#getSibling(boolean) |
| */ |
| public Node getSibling(boolean forward) { |
| if (forward != _forward) |
| { |
| return _refNode; |
| } |
| if (forward) |
| { |
| return _refNode.getNextSibling(); |
| } |
| return _refNode.getPreviousSibling(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#getNextSiblingNode() |
| */ |
| public Node getNextSiblingNode() { |
| return getSibling(true); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#getPreviousSiblingNode() |
| */ |
| public Node getPreviousSiblingNode() { |
| return getSibling(false); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#getContainerNode() |
| */ |
| public Node getContainerNode() { |
| return _refNode.getParentNode(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#getOffset() |
| */ |
| public int getOffset() { |
| Node parent = _refNode.getParentNode(); |
| if (parent == null) { |
| return _forward ? 1 : 0; |
| } |
| NodeList list = parent.getChildNodes(); |
| for (int i = 0, n = list.getLength(); i < n; i++) { |
| if (list.item(i) == _refNode) { |
| return _forward ? (i + 1) : i; |
| } |
| } |
| // should not happen. |
| return -1; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.range.IDOMPosition#isText() |
| */ |
| public boolean isText() { |
| return false; |
| } |
| |
| public IDOMPosition handleReplacement(Node original, Node replacement) { |
| if (this._refNode == original) { |
| return new DOMRefPosition(replacement, this._forward); |
| } |
| return this; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() { |
| return "DOMRefPosition: (" + (_forward ? "after " : "before ") |
| + _refNode + ")"; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jst.pagedesigner.dom.IDOMRefPosition#getReferenceNode() |
| */ |
| public Node getReferenceNode() { |
| return _refNode; |
| } |
| |
| public boolean isForward() { |
| return _forward; |
| } |
| } |