| /******************************************************************************* |
| * Copyright (c) 2005 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.bpel.common.ui.tray; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.EditPartViewer; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| |
| /** |
| * The adapting selection provider is used by the BPEL graphical editor |
| * so that it can provide its selection in terms of model objects rather |
| * than in terms of EditPart objects. This class takes care of converting |
| * from model objects to EditParts, and vice versa, when necessary. |
| */ |
| public class AdaptingSelectionProvider extends MultiViewerSelectionProvider { |
| |
| /** |
| * Brand new shiny AdaptingSelectionProvider ... |
| * @param viewer |
| */ |
| public AdaptingSelectionProvider(EditPartViewer viewer) { |
| super(viewer); |
| } |
| |
| /** |
| * Brand new shiny AdaptingSelectionProvider ... |
| */ |
| public AdaptingSelectionProvider() { |
| super(); |
| } |
| |
| |
| @Override |
| protected IStructuredSelection calculateSelection (IStructuredSelection selection) { |
| |
| if (selection == null || selection.isEmpty()) { |
| return StructuredSelection.EMPTY; |
| } |
| |
| List<EObject> list = new ArrayList<EObject>(); |
| Set<EObject> newSet = new HashSet<EObject>(); |
| |
| for (Object model : selection.toArray()) { |
| if (model instanceof EditPart) { |
| model = ((EditPart)model).getModel(); |
| } |
| if (model instanceof EObject) { |
| EObject eObj = (EObject) model; |
| if (newSet.add(eObj)) { |
| list.add(eObj); |
| } |
| } |
| } |
| if (list.isEmpty()) { |
| return StructuredSelection.EMPTY; |
| } |
| return new StructuredSelection( list ); |
| } |
| |
| /** |
| * Set selection to each of the viewers and make sure we ignore callbacks |
| * |
| */ |
| |
| @Override |
| protected void internalSetSelection(IStructuredSelection selection) { |
| |
| if (selection == null || selection.isEmpty() ) { |
| return; |
| } |
| try { |
| changingSelection = true; |
| for(EditPartViewer viewer : viewers ) { |
| List<EditPart> newList = new ArrayList<EditPart>(); |
| Map<Object,EditPart> registry = viewer.getEditPartRegistry(); |
| |
| for(Object o : selection.toArray()) { |
| EditPart editPart = registry.get(o); |
| if (editPart != null) { |
| newList.add(editPart); |
| } |
| } |
| viewer.setSelection(new StructuredSelection(newList)); |
| } |
| } finally { |
| changingSelection = false; |
| } |
| } |
| } |