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/*******************************************************************************
* Copyright (c) 2005, 2006 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.elements.adapters;
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.core.DebugEvent;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IDebugEventSetListener;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.ISourceLocator;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IThread;
import org.eclipse.debug.internal.ui.InstructionPointerManager;
import org.eclipse.debug.internal.ui.contexts.provisional.ISourceDisplayAdapter;
import org.eclipse.debug.internal.ui.sourcelookup.SourceLookupResult;
import org.eclipse.debug.internal.ui.views.launch.DecorationManager;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.sourcelookup.ISourceLookupResult;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.progress.UIJob;
/**
* @since 3.2
*/
public class StackFrameSourceDisplayAdapter implements ISourceDisplayAdapter {
private IStackFrame fPrevFrame;
private SourceLookupResult fPrevResult;
/**
* Constructs singleton source display adapter for stack frames.
*/
public StackFrameSourceDisplayAdapter() {
DebugPlugin.getDefault().addDebugEventListener(new IDebugEventSetListener() {
public void handleDebugEvents(DebugEvent[] events) {
for (int i = 0; i < events.length; i++) {
DebugEvent event = events[i];
switch (event.getKind()) {
case DebugEvent.TERMINATE:
clearCachedModel(event.getSource());
// fall through
case DebugEvent.RESUME:
if (!event.isEvaluation()) {
clearSourceSelection(event.getSource());
}
break;
}
}
}
});
}
private SourceLookupJob fSourceLookupJob = new SourceLookupJob();
/**
* A job to perform source lookup on the currently selected stack frame.
*/
class SourceLookupJob extends Job {
private IStackFrame fTarget;
private ISourceLocator fLocator;
private IWorkbenchPage fPage;
/**
* Constructs a new source lookup job.
*/
public SourceLookupJob() {
super("Debug Source Lookup"); //$NON-NLS-1$
setPriority(Job.INTERACTIVE);
setSystem(true);
}
public void setLookupInfo(IStackFrame frame, ISourceLocator locator, IWorkbenchPage page) {
fTarget = frame;
fLocator = locator;
fPage = page;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)
*/
protected IStatus run(IProgressMonitor monitor) {
if (!monitor.isCanceled()) {
IStackFrame lookupFrame = fTarget;
ISourceLocator lookupLocator = fLocator;
if (lookupFrame != null && lookupLocator != null) {
ISourceLookupResult result = null;
result = DebugUITools.lookupSource(lookupFrame, lookupLocator);
synchronized (StackFrameSourceDisplayAdapter.this) {
fPrevResult = (SourceLookupResult)result;
fPrevFrame = lookupFrame;
}
if (!monitor.isCanceled() && fPage != null) {
fSourceDisplayJob.setDisplayInfo(result, fPage);
fSourceDisplayJob.schedule();
}
}
setLookupInfo(null, null, null);
}
return Status.OK_STATUS;
}
}
private SourceDisplayJob fSourceDisplayJob = new SourceDisplayJob();
class SourceDisplayJob extends UIJob {
private ISourceLookupResult fResult;
private IWorkbenchPage fPage;
public SourceDisplayJob() {
super("Debug Source Display"); //$NON-NLS-1$
setSystem(true);
setPriority(Job.INTERACTIVE);
}
/**
* Constructs a new source display job
*/
public synchronized void setDisplayInfo(ISourceLookupResult result, IWorkbenchPage page) {
fResult = result;
fPage = page;
}
/* (non-Javadoc)
* @see org.eclipse.ui.progress.UIJob#runInUIThread(org.eclipse.core.runtime.IProgressMonitor)
*/
public synchronized IStatus runInUIThread(IProgressMonitor monitor) {
if (!monitor.isCanceled() && fResult != null && fPage != null) {
DebugUITools.displaySource(fResult, fPage);
}
setDisplayInfo(null, null);
return Status.OK_STATUS;
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.ISourceDisplayAdapter#displaySource(java.lang.Object, org.eclipse.ui.IWorkbenchPage, boolean)
*/
public synchronized void displaySource(Object context, IWorkbenchPage page, boolean force) {
IStackFrame frame = (IStackFrame)context;
if (!force && frame.equals(fPrevFrame)) {
fPrevResult.updateArtifact(context);
fSourceDisplayJob.setDisplayInfo(fPrevResult, page);
fSourceDisplayJob.schedule();
} else {
fSourceLookupJob.setLookupInfo(frame, frame.getLaunch().getSourceLocator(), page);
fSourceLookupJob.schedule();
}
}
/**
* Clears any source decorations associated with the given thread or
* debug target.
*
* @param source thread or debug target
*/
private void clearSourceSelection(Object source) {
if (source instanceof IThread) {
IThread thread = (IThread)source;
DecorationManager.removeDecorations(thread);
InstructionPointerManager.getDefault().removeAnnotations(thread);
} else if (source instanceof IDebugTarget) {
IDebugTarget target = (IDebugTarget)source;
DecorationManager.removeDecorations(target);
InstructionPointerManager.getDefault().removeAnnotations(target);
}
}
/**
* Clear any cached results associated with the given object.
*
* @param source
*/
private synchronized void clearCachedModel(Object source) {
if (fPrevFrame != null) {
IDebugTarget target = null;
if (source instanceof IDebugElement) {
target = ((IDebugElement)source).getDebugTarget();
}
if (fPrevFrame.getDebugTarget().equals(target)) {
fPrevFrame = null;
fPrevResult = null;
}
}
}
}
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