| /******************************************************************************* |
| * Copyright (c) 2007, 2010 BMW Car IT, Technische Universitaet Muenchen, and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * BMW Car IT - Initial API and implementation |
| * Technische Universitaet Muenchen - Major refactoring and extension |
| *******************************************************************************/ |
| package org.eclipse.emf.edapt.history.presentation; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.resource.Resource; |
| import org.eclipse.emf.edapt.common.ui.ModelSash; |
| import org.eclipse.emf.edapt.common.ui.SyncedMetamodelEditorViewBase; |
| import org.eclipse.emf.edapt.history.util.HistoryUtils; |
| import org.eclipse.emf.edapt.spi.history.Change; |
| import org.eclipse.emf.edapt.spi.history.Delete; |
| import org.eclipse.emf.edapt.spi.history.History; |
| import org.eclipse.emf.edapt.spi.history.NonDelete; |
| import org.eclipse.emf.edapt.spi.history.ValueChange; |
| import org.eclipse.jface.viewers.DoubleClickEvent; |
| import org.eclipse.jface.viewers.IDoubleClickListener; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| |
| /** |
| * View to show related changes |
| * |
| * @author herrmama |
| * @author $Author$ |
| * @version $Rev$ |
| * @levd.rating RED Rev: |
| */ |
| public class ElementChangesView extends SyncedMetamodelEditorViewBase { |
| |
| /** |
| * Identifier of the view like in the plugin.xml |
| */ |
| public static final String ID = ElementChangesView.class.getName(); |
| |
| /** |
| * Sash to show the history reduced to the related changes |
| */ |
| private ModelSash sash; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void createContents(Composite parent) { |
| |
| sash = new ModelSash(parent, SWT.None); |
| |
| sash.getStructureViewer().setSorter(null); |
| sash.getStructureViewer().addDoubleClickListener(new IDoubleClickListener() { |
| |
| @Override |
| public void doubleClick(DoubleClickEvent event) { |
| final IStructuredSelection selection = (IStructuredSelection) event.getSelection(); |
| getEditor().getViewer().setSelection(new StructuredSelection(selection.getFirstElement()), true); |
| } |
| |
| }); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void setFocus() { |
| sash.getStructureViewer().getTree().setFocus(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void selectionChanged(IStructuredSelection structuredSelection) { |
| if (structuredSelection.size() == 1) { |
| final Object firstElement = structuredSelection.getFirstElement(); |
| if (firstElement instanceof EObject) { |
| update((EObject) firstElement); |
| } |
| } |
| } |
| |
| /** |
| * Update the view |
| */ |
| private void update(EObject element) { |
| |
| final History history = getHistory(); |
| if (history != null) { |
| sash.getStructureViewer().setInput(history); |
| |
| final List<Change> changes = getChanges(element); |
| final Set<EObject> elements = enrich(changes); |
| |
| sash.getStructureViewer().setFilters(new ViewerFilter[] { new ViewerFilter() { |
| |
| @Override |
| public boolean select(Viewer viewer, Object parentElement, |
| Object element) { |
| return elements.contains(element); |
| } |
| |
| } }); |
| |
| sash.getStructureViewer().expandToLevel(2); |
| } |
| } |
| |
| /** |
| * Enrich changes to paths leading to them |
| */ |
| private Set<EObject> enrich(List<Change> changes) { |
| final Set<EObject> elements = new HashSet<EObject>(); |
| |
| for (final Change change : changes) { |
| EObject element = change; |
| while (element != null) { |
| elements.add(element); |
| element = element.eContainer(); |
| } |
| } |
| |
| return elements; |
| } |
| |
| /** |
| * Get the changes related to an element |
| */ |
| private List<Change> getChanges(EObject element) { |
| if (element instanceof Change && getElement((Change) element) != null) { |
| element = getElement((Change) element); |
| } |
| final List<Change> changes = new ArrayList<Change>(); |
| final History history = getHistory(); |
| if (history != null) { |
| for (final Iterator<EObject> i = history.eAllContents(); i.hasNext();) { |
| final EObject historyElement = i.next(); |
| if (historyElement instanceof Change) { |
| final Change change = (Change) historyElement; |
| if (getElement(change) == element) { |
| changes.add(change); |
| } |
| } |
| } |
| } |
| return changes; |
| } |
| |
| /** |
| * Get the history |
| */ |
| private History getHistory() { |
| final Resource resource = HistoryUtils.getHistoryResource(getEditor().getEditingDomain().getResourceSet()); |
| return resource != null ? (History) resource.getContents().get(0) : null; |
| } |
| |
| /** |
| * Get the element of a change |
| */ |
| private EObject getElement(Change change) { |
| if (change instanceof NonDelete) { |
| return ((NonDelete) change).getElement(); |
| } else if (change instanceof Delete) { |
| return ((Delete) change).getElement(); |
| } else if (change instanceof ValueChange) { |
| return ((ValueChange) change).getElement(); |
| } |
| return null; |
| } |
| } |