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/*******************************************************************************
* Copyright (c) 2005, 2013 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.examples.ui.pda.adapters;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchManager;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IThread;
import org.eclipse.debug.examples.core.pda.model.PDAThread;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ModelDelta;
import org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy;
import org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler;
/**
* @since 3.2
*/
public class PDAThreadEventHandler extends DebugEventHandler {
private IStackFrame fPrev = null;
/**
* Constructs and event handler for a threads in the given viewer.
*
* @param viewer
*/
public PDAThreadEventHandler(AbstractModelProxy proxy) {
super(proxy);
}
protected void handleSuspend(DebugEvent event) {
IThread thread = (IThread) event.getSource();
int extras = IModelDelta.STATE;
if (event.getDetail() == DebugEvent.BREAKPOINT | event.getDetail() == DebugEvent.CLIENT_REQUEST) {
extras = IModelDelta.EXPAND;
}
fireDeltaUpdatingTopFrame(thread, IModelDelta.NO_CHANGE | extras);
}
private boolean isEqual(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null) {
return false;
}
return o1.equals(o2);
}
protected void handleResume(DebugEvent event) {
IThread thread = (IThread) event.getSource();
fireDeltaAndClearTopFrame(thread, IModelDelta.STATE | IModelDelta.CONTENT);
}
protected void handleCreate(DebugEvent event) {
fireDeltaAndClearTopFrame((IThread) event.getSource(), IModelDelta.ADDED);
}
protected void handleTerminate(DebugEvent event) {
fireDeltaAndClearTopFrame((IThread) event.getSource(), IModelDelta.REMOVED);
}
protected void handleChange(DebugEvent event) {
fireDeltaUpdatingTopFrame((IThread) event.getSource(), IModelDelta.STATE);
}
protected void handleLateSuspend(DebugEvent suspend, DebugEvent resume) {
IThread thread = (IThread) suspend.getSource();
fireDeltaUpdatingTopFrame(thread, IModelDelta.CONTENT | IModelDelta.EXPAND);
}
protected void handleSuspendTimeout(DebugEvent event) {
IThread thread = (IThread) event.getSource();
fireDeltaAndClearTopFrame(thread, IModelDelta.CONTENT);
}
private ModelDelta buildRootDelta() {
return new ModelDelta(getLaunchManager(), IModelDelta.NO_CHANGE);
}
private ILaunchManager getLaunchManager() {
return DebugPlugin.getDefault().getLaunchManager();
}
protected ModelDelta addTarget(ModelDelta delta, IThread thread) {
ILaunch launch = thread.getLaunch();
Object[] children = launch.getChildren();
ModelDelta newdelta = delta.addNode(launch, indexOf(getLaunchManager().getLaunches(), launch), IModelDelta.NO_CHANGE, children.length);
IDebugTarget debugTarget = thread.getDebugTarget();
int numFrames = -1;
try {
numFrames = thread.getStackFrames().length;
} catch (DebugException e) {
}
return newdelta.addNode(debugTarget, indexOf(children, debugTarget), IModelDelta.NO_CHANGE, numFrames);
}
/**
* @param thread
* @param flags
*/
private void fireDeltaAndClearTopFrame(IThread thread, int flags) {
ModelDelta delta = buildRootDelta();
addTarget(delta, thread);
synchronized (this) {
fPrev = null;
}
fireDelta(delta);
}
private void fireDeltaUpdatingTopFrame(IThread thread, int flags) {
ModelDelta delta = buildRootDelta();
ModelDelta node = addTarget(delta, thread);
synchronized (this) {
IStackFrame prev = fPrev;
IStackFrame frame = null;
try {
frame = thread.getTopStackFrame();
} catch (DebugException e) {
}
if (isEqual(frame, prev)) {
node.setFlags(flags);
} else {
node.setFlags(flags | IModelDelta.CONTENT);
}
if (frame != null) {
node.addNode(frame, 0, IModelDelta.STATE | IModelDelta.SELECT, 0);
}
fPrev = frame;
}
fireDelta(delta);
}
protected boolean handlesEvent(DebugEvent event) {
return event.getSource() instanceof PDAThread;
}
}
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