/*******************************************************************************
* 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.commands;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jst.pagedesigner.dom.DOMPosition;
import org.eclipse.jst.pagedesigner.dom.DOMUtil;
import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Move a node from one place to another place.
*
* @author mengbo
* @version 1.5
*/
public class MoveNodeCommand extends DesignerCommand {
private IDOMPosition insertPosition;
private Node originalNode;
/**
* @param viewer
* @param insertionPoint
* @param originalNode
*/
public MoveNodeCommand(IHTMLGraphicalViewer viewer,
IDOMPosition insertionPoint, Node originalNode) {
super(
CommandResources.getString("MoveNodeCommand.Label.MoveNode"), viewer); //$NON-NLS-1$
this.insertPosition = insertionPoint;
this.originalNode = originalNode;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.commands.DesignerCommand#doExecute()
*/
protected void doExecute() {
getModel().beginRecording(this);
try {
Node originalParent = originalNode.getParentNode();
if (originalParent == null) {
return;
}
// when remove the _originalNode, may affect the insertionPosition.
if (originalParent == insertPosition.getContainerNode()) {
// under same parent, may affect it.
int insertIndex = insertPosition.getOffset();
int nodeIndex = -1;
NodeList list = originalParent.getChildNodes();
for (int i = 0, length = list.getLength(); i < length; i++) {
if (originalNode == list.item(i)) {
nodeIndex = i;
}
}
if (nodeIndex == -1) {
return; // should not happen.
}
if (insertIndex < nodeIndex) {
insertPosition = new DOMPosition(originalParent,
insertIndex);
} else if (insertIndex == nodeIndex
|| insertIndex == nodeIndex + 1) {
// move to same position, do nothing.
return;
} else {
insertPosition = new DOMPosition(originalParent,
insertIndex - 1);
}
}
originalParent.removeChild(originalNode);
DOMUtil.insertNode(insertPosition, originalNode);
} finally {
getModel().endRecording(this);
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.commands.DesignerCommand#getAfterCommandDesignerSelection()
*/
protected ISelection getAfterCommandDesignerSelection() {
return toDesignSelection(originalNode);
}
}