| /******************************************************************************* |
| * Copyright (c) 2004, 2018 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.debug.internal.ui.views.memory.renderings; |
| |
| import org.eclipse.debug.core.DebugEvent; |
| import org.eclipse.debug.core.IDebugEventSetListener; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.widgets.Control; |
| |
| /** |
| * @since 3.0 |
| * |
| */ |
| public abstract class BasicDebugViewContentProvider implements IStructuredContentProvider, IDebugEventSetListener { |
| |
| protected StructuredViewer fViewer; |
| protected boolean fDisposed= false; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| @Override |
| public void dispose() { |
| fDisposed= true; |
| } |
| |
| /** |
| * Returns whether this content provider has already |
| * been disposed. |
| * @return if the provider is disposed |
| */ |
| protected boolean isDisposed() { |
| return fDisposed; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| fViewer= (StructuredViewer) viewer; |
| } |
| |
| protected void asyncExec(Runnable r) { |
| if (fViewer != null) { |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) { |
| ctrl.getDisplay().asyncExec(r); |
| } |
| } |
| } |
| |
| protected void syncExec(Runnable r) { |
| if (fViewer != null) { |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) { |
| ctrl.getDisplay().syncExec(r); |
| } |
| } |
| } |
| |
| /** |
| * Refreshes the viewer - must be called in UI thread. |
| */ |
| protected void refresh() { |
| if (fViewer != null) { |
| fViewer.refresh(); |
| } |
| } |
| |
| /** |
| * Refresh the given element in the viewer - must be called in UI thread. |
| * @param element the element to refresh in the viewer |
| */ |
| protected void refresh(Object element) { |
| if (fViewer != null) { |
| fViewer.refresh(element); |
| } |
| } |
| |
| /** |
| * Handle debug events on the main thread. |
| * @param event the debug event |
| */ |
| public void handleDebugEvent(final DebugEvent event) { |
| if (fViewer == null) { |
| return; |
| } |
| Object element= event.getSource(); |
| if (element == null) { |
| return; |
| } |
| Runnable r = () -> { |
| if (!isDisposed()) { |
| doHandleDebugEvent(event); |
| } |
| }; |
| |
| asyncExec(r); |
| } |
| |
| /* (non-Javadoc) |
| * @see IDebugEventSetListener#handleDebugEvents(DebugEvent[]) |
| */ |
| @Override |
| public void handleDebugEvents(DebugEvent[] events) { |
| for (int i=0; i < events.length; i++) { |
| handleDebugEvent(events[i]); |
| } |
| } |
| |
| /** |
| * Performs an update based on the event |
| * @param event the debug event |
| */ |
| protected abstract void doHandleDebugEvent(DebugEvent event); |
| } |