| /******************************************************************************* |
| * Copyright (c) 2016 EclipseSource Muenchen GmbH 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: |
| * Stefan Dirix - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.emf.compare.ide.ui.e4; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.IJobChangeListener; |
| import org.eclipse.emf.compare.ide.ui.internal.treecontentmanager.EMFCompareDeferredTreeContentManager; |
| import org.eclipse.jface.viewers.AbstractTreeViewer; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.ui.internal.progress.ProgressMessages; |
| import org.eclipse.ui.progress.DeferredTreeContentManager; |
| import org.eclipse.ui.progress.PendingUpdateAdapter; |
| import org.eclipse.ui.progress.UIJob; |
| |
| /** |
| * Subclass of {@link DeferredTreeContentManager} which works without a workbench. |
| * |
| * @author Stefan Dirix <sdirix@eclipsesource.com> |
| */ |
| @SuppressWarnings("restriction") |
| public class E4DeferredTreeContentManager extends DeferredTreeContentManager implements EMFCompareDeferredTreeContentManager { |
| |
| /** |
| * The treeviewer whose content is to manage. |
| */ |
| private final AbstractTreeViewer treeViewer; |
| |
| /** |
| * Listener collection. |
| */ |
| private ListenerList updateCompleteListenerList; |
| |
| /** |
| * Constructor. |
| * |
| * @param treeViewer |
| * The treeViewer to update. |
| */ |
| public E4DeferredTreeContentManager(AbstractTreeViewer treeViewer) { |
| super(treeViewer); |
| this.treeViewer = treeViewer; |
| } |
| |
| @Override |
| protected PendingUpdateAdapter createPendingUpdateAdapter() { |
| return new E4PendingUpdateAdapter(); |
| } |
| |
| @Override |
| protected void addChildren(final Object parent, final Object[] children, final IProgressMonitor monitor) { |
| UIJob updateJob = new UIJob(Display.getDefault(), |
| ProgressMessages.DeferredTreeContentManager_AddingChildren) { |
| @Override |
| public IStatus runInUIThread(IProgressMonitor updateMonitor) { |
| // Cancel the job if the tree viewer got closed |
| if (treeViewer.getControl().isDisposed() || updateMonitor.isCanceled()) { |
| return Status.CANCEL_STATUS; |
| } |
| treeViewer.add(parent, children); |
| return Status.OK_STATUS; |
| } |
| }; |
| updateJob.setSystem(true); |
| updateJob.schedule(); |
| } |
| |
| @Override |
| protected void runClearPlaceholderJob(PendingUpdateAdapter placeholder) { |
| final E4PendingUpdateAdapter e4Placeholder = (E4PendingUpdateAdapter)placeholder; |
| if (e4Placeholder.isRemoved()) { |
| return; |
| } |
| // Clear the placeholder if it is still there |
| UIJob clearJob = new UIJob(Display.getDefault(), |
| ProgressMessages.DeferredTreeContentManager_ClearJob) { |
| @Override |
| public IStatus runInUIThread(IProgressMonitor monitor) { |
| if (!e4Placeholder.isRemoved()) { |
| Control control = treeViewer.getControl(); |
| if (control.isDisposed()) { |
| return Status.CANCEL_STATUS; |
| } |
| treeViewer.remove(e4Placeholder); |
| e4Placeholder.setRemoved(true); |
| } |
| return Status.OK_STATUS; |
| } |
| }; |
| clearJob.setSystem(true); |
| |
| if (updateCompleteListenerList != null) { |
| Object[] listeners = updateCompleteListenerList.getListeners(); |
| for (int i = 0; i < listeners.length; i++) { |
| clearJob.addJobChangeListener((IJobChangeListener)listeners[i]); |
| } |
| } |
| clearJob.schedule(); |
| } |
| |
| // XXX Copied from super class since we need access to updateCompleteListenerList within |
| // #runClearPlaceholderJob |
| @Override |
| public void addUpdateCompleteListener(IJobChangeListener listener) { |
| if (listener == null && updateCompleteListenerList != null) { |
| Object[] listeners = updateCompleteListenerList.getListeners(); |
| if (listeners.length == 1) { |
| removeUpdateCompleteListener((IJobChangeListener)listeners[0]); |
| } |
| } else { |
| if (updateCompleteListenerList == null) { |
| updateCompleteListenerList = new ListenerList(); |
| } |
| updateCompleteListenerList.add(listener); |
| } |
| } |
| |
| // XXX Copied from super class since we need access to updateCompleteListenerList within |
| // #runClearPlaceholderJob |
| @Override |
| public void removeUpdateCompleteListener(IJobChangeListener listener) { |
| if (updateCompleteListenerList != null) { |
| updateCompleteListenerList.remove(listener); |
| } |
| } |
| |
| } |