| /******************************************************************************* |
| * Copyright (c) 2005, 2012 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.ui; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.eclipse.bpel.common.ui.tray.AdaptingSelectionProvider; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.EditPartViewer; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| |
| |
| /** |
| * A version of AdaptingSelectionProvider with extra support for also using EditPart-based |
| * selections, which are needed by some of our actions. (Basically some code copied from |
| * MultiViewerSelectionProvider!) |
| */ |
| public class BPELAdaptingSelectionProvider extends AdaptingSelectionProvider { |
| |
| protected IStructuredSelection cachedEditPartSelection; |
| |
| /** |
| * Brand new shiny BPELAdaptingSelectionProvider ... |
| * @param viewer |
| */ |
| |
| public BPELAdaptingSelectionProvider(EditPartViewer viewer) { |
| super(viewer); |
| } |
| |
| |
| /** |
| * Brand new shiny BPELAdaptingSelectionProvider ... |
| */ |
| public BPELAdaptingSelectionProvider() { |
| super(); |
| } |
| |
| /** |
| * @see org.eclipse.bpel.common.ui.tray.MultiViewerSelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection) |
| */ |
| @Override |
| public void setSelection (ISelection selection) { |
| if (selection instanceof IStructuredSelection == false) { |
| return; |
| } |
| |
| cachedSelection = calculateSelection((IStructuredSelection) selection); |
| internalSetSelection(cachedSelection); |
| cachedEditPartSelection = calculateEditPartSelection(); |
| fireSelectionChanged(this, cachedSelection); |
| } |
| |
| |
| protected IStructuredSelection calculateEditPartSelection() { |
| |
| List<EditPart> result = new ArrayList<EditPart>(); |
| Set<Object> modelObjectSet = new HashSet<Object>(); |
| |
| for(EditPartViewer v : viewers ) { |
| List<EditPart> viewerParts = v.getSelectedEditParts(); |
| |
| // NOTE: filter out duplicate edit parts, so that we only return |
| // one edit part per model object. |
| for(EditPart ep : viewerParts) { |
| Object model = ep.getModel(); |
| if (modelObjectSet.add(model)) { |
| result.add(ep); |
| } |
| } |
| } |
| if (result.isEmpty()) { |
| return StructuredSelection.EMPTY; |
| } |
| return new StructuredSelection(result); |
| } |
| |
| /** |
| * This is for the benefit of our actions which require an EditPart-based selection. |
| * @return the selection of edit parts. |
| */ |
| |
| public IStructuredSelection getEditPartSelection() { |
| if (cachedEditPartSelection == null) { |
| cachedEditPartSelection = calculateEditPartSelection(); |
| } |
| return cachedEditPartSelection; |
| } |
| } |