/******************************************************************************* | |
* 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; | |
} | |
} |