| /******************************************************************************* |
| * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) 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: |
| * Soyatec - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.xwt.tools.ui.designer.commands; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.Request; |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gef.requests.ForwardedRequest; |
| import org.eclipse.xwt.tools.ui.xaml.XamlDocument; |
| import org.eclipse.xwt.tools.ui.xaml.XamlElement; |
| import org.eclipse.xwt.tools.ui.xaml.XamlNode; |
| |
| /** |
| * @author jliu jin.liu@soyatec.com |
| */ |
| public abstract class LayoutCommandsFactory { |
| private EditPart host; |
| |
| public LayoutCommandsFactory(EditPart host) { |
| this.host = host; |
| } |
| |
| public EditPart getHost() { |
| return host; |
| } |
| |
| public XamlNode getModel() { |
| return (XamlNode) host.getModel(); |
| } |
| |
| public Command getDeleteCommand(Request request) { |
| if (!(request instanceof ForwardedRequest)) { |
| return null; |
| } |
| EditPart sender = ((ForwardedRequest) request).getSender(); |
| Object model = sender.getModel(); |
| if (isRoot(model)) { |
| return null; |
| } |
| return getDeleteCommand(Collections.singletonList(sender)); |
| } |
| |
| private boolean isRoot(Object model) { |
| return model != null && model instanceof XamlElement && ((XamlElement) model).eContainer() instanceof XamlDocument; |
| } |
| |
| public Command getDeleteCommand(List deleteObjects) { |
| if (deleteObjects == null || deleteObjects.isEmpty()) { |
| return null; |
| } |
| return new DeleteCommand(deleteObjects); |
| } |
| |
| } |