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/*******************************************************************************
* Copyright (c) 2004, 2018 IBM Corporation and others.
*
* 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:
* 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;
@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;
}
@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);
}
@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);
}
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