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/*****************************************************************
* Copyright (c) 2009, 2013 Texas Instruments 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:
* Patrick Chuong (Texas Instruments) - Initial API and implementation (Bug 238956)
* Wind River Systems - ongoing enhancements and bug fixing
* IBM Corporation - bug fixing
*****************************************************************/
package org.eclipse.debug.internal.ui.viewers.update;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.internal.ui.elements.adapters.DefaultBreakpointsViewInput;
import org.eclipse.debug.internal.ui.model.elements.BreakpointManagerContentProvider;
import org.eclipse.debug.internal.ui.viewers.model.ViewerAdapterService;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.ui.progress.WorkbenchJob;
/**
* Breakpoint manager model proxy.
*
* @since 3.6
*/
public class BreakpointManagerProxy extends AbstractModelProxy {
/**
* The breakpoint manager content provider for this model proxy
*/
final private BreakpointManagerContentProvider fProvider;
/**
* The breakpoint manager input for this model proxy
*/
final private DefaultBreakpointsViewInput fInput;
/**
* Job to fire posted deltas.
*/
private Job fFireModelChangedJob;
/**
* Object used for describing a posted delta.
*/
private static class DeltaInfo {
final boolean fSelect;
final IModelDelta fDelta;
DeltaInfo(boolean selectDelta, IModelDelta delta) {
fSelect = selectDelta;
fDelta = delta;
}
}
/**
* List of posted deltas ready to be fired.
*/
private List<DeltaInfo> fPendingDeltas = new LinkedList<DeltaInfo>();
/**
* Constructor.
*
* @param input the breakpoint manager input
* @param context the presentation context for this model proxy
*/
public BreakpointManagerProxy(Object input, IPresentationContext context) {
super();
DefaultBreakpointsViewInput bpmInput = null;
BreakpointManagerContentProvider bpmProvider = null;
if (input instanceof DefaultBreakpointsViewInput) {
bpmInput = (DefaultBreakpointsViewInput) input;
// cache the required data and pass to the provider when this model is installed
IElementContentProvider provider = ViewerAdapterService.getContentProvider(input);
if (provider instanceof BreakpointManagerContentProvider) {
bpmProvider = (BreakpointManagerContentProvider) provider;
}
}
fInput = bpmInput;
fProvider = bpmProvider;
}
/*
* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy#installed(org.eclipse.jface.viewers.Viewer)
*/
@Override
public void installed(Viewer viewer) {
super.installed(viewer);
if (fProvider != null) {
fProvider.registerModelProxy(fInput, this);
}
}
/*
* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy#dispose()
*/
@Override
public void dispose() {
fProvider.unregisterModelProxy(fInput, this);
synchronized(this) {
if (fFireModelChangedJob != null) {
fFireModelChangedJob.cancel();
fFireModelChangedJob = null;
}
fPendingDeltas.clear();
}
super.dispose();
}
/**
* Posts a given delta to be fired by the proxy. Posting a delta places it
* in a queue which is later emptied by a job that fires the deltas.
* <p>
* If the delta is used only to select a breakpiont and does not change the
* viewer content, the caller should set the <code>select</code> parameter
* to <code>true</code>. When a select delta is added to the delta queue,
* any previous select deltas are removed.
*
* @param delta Delta to be posted to the viewer.
* @param select Flag indicating that the delta is only to change the
* viewer selection.
*/
public synchronized void postModelChanged(IModelDelta delta, boolean select) {
// Check for proxy being disposed.
if (isDisposed()) {
return;
}
// Check for viewer being disposed.
Widget viewerControl = getViewer().getControl();
if (viewerControl == null) {
return;
}
// If we are processing a select delta, remove the previous select delta.
if (select) {
for (Iterator<DeltaInfo> itr = fPendingDeltas.iterator(); itr.hasNext();) {
if ( itr.next().fSelect ) {
itr.remove();
}
}
}
fPendingDeltas.add(new DeltaInfo(select, delta));
if (fFireModelChangedJob == null) {
fFireModelChangedJob = new WorkbenchJob(viewerControl.getDisplay(), "Select Breakpoint Job") { //$NON-NLS-1$
{
setSystem(true);
}
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
Object[] deltas;
synchronized(BreakpointManagerProxy.this) {
deltas = fPendingDeltas.toArray();
fPendingDeltas.clear();
fFireModelChangedJob = null;
}
for (int i = 0; i < deltas.length; i++) {
fireModelChanged( ((DeltaInfo)deltas[i]).fDelta );
}
return Status.OK_STATUS;
}
};
fFireModelChangedJob.schedule();
}
}
}
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