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/*******************************************************************************
* Copyright (c) 2005, 2009 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.viewers.update;
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.IBreakpoint;
import org.eclipse.debug.core.model.IDebugElement;
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.internal.ui.viewers.model.provisional.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ModelDelta;
import org.eclipse.jface.viewers.Viewer;
/**
* Default model proxy for a debug target.
*
* @since 3.2
*/
public class DebugTargetProxy extends EventHandlerModelProxy {
private IDebugTarget fDebugTarget;
public DebugTargetProxy(IDebugTarget target) {
fDebugTarget = target;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#dispose()
*/
@Override
public synchronized void dispose() {
super.dispose();
fDebugTarget = null;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#containsEvent(org.eclipse.debug.core.DebugEvent)
*/
@Override
protected boolean containsEvent(DebugEvent event) {
Object source = event.getSource();
if (source instanceof IDebugElement) {
IDebugTarget debugTarget = ((IDebugElement) source).getDebugTarget();
// an expression can return null for debug target
if (debugTarget != null) {
return debugTarget.equals(fDebugTarget);
}
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#createEventHandlers()
*/
@Override
protected DebugEventHandler[] createEventHandlers() {
ThreadEventHandler threadEventHandler = new ThreadEventHandler(this);
return new DebugEventHandler[] { new DebugTargetEventHandler(this), threadEventHandler,
new StackFrameEventHandler(this, threadEventHandler) };
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.provisional.IModelProxy#installed(org.eclipse.jface.viewers.Viewer)
*/
@Override
public void installed(Viewer viewer) {
// select any thread that is already suspended after installation
IDebugTarget target = fDebugTarget;
if (target != null) {
ModelDelta delta = getNextSuspendedThreadDelta(null, false);
if (delta == null) {
try {
ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
ILaunch launch = target.getLaunch();
int launchIndex = getLaunchIndex(launch);
int targetIndex = getTargetIndex(target);
delta = new ModelDelta(manager, IModelDelta.NO_CHANGE);
ModelDelta node = delta.addNode(launch, launchIndex, IModelDelta.NO_CHANGE, target.getLaunch().getChildren().length);
node = node.addNode(target, targetIndex, IModelDelta.EXPAND | IModelDelta.SELECT, target.getThreads().length);
} catch (DebugException e) {
// In case of exception do not fire delta
return;
}
}
// expand the target if no suspended thread
fireModelChanged(delta);
}
}
protected ModelDelta getNextSuspendedThreadDelta(IThread currentThread, boolean reverse) {
IDebugTarget target = fDebugTarget;
if (target != null) {
try {
IThread[] threads = target.getThreads();
IThread chosen = null;
int threadIndex = -1;
// select the first thread with a breakpoint, or the first suspended thread
// if none have breakpoints
boolean takeNext = currentThread == null;
int startIdx = reverse ? threads.length - 1 : 0;
int endIdx = reverse ? -1 : threads.length;
int increment = reverse ? -1 : 1;
for (int i = startIdx; i != endIdx; i = i + increment) {
IThread thread = threads[i];
if (takeNext && thread.isSuspended()) {
IBreakpoint[] bps = thread.getBreakpoints();
if (bps != null && bps.length > 0) {
chosen = thread;
threadIndex = i;
break;
} else {
if (chosen == null) {
chosen = thread;
threadIndex = i;
}
}
}
takeNext = takeNext || thread.equals(currentThread);
}
if (chosen != null) {
IStackFrame frame = chosen.getTopStackFrame();
if (frame != null) {
ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
ILaunch launch = target.getLaunch();
int launchIndex = getLaunchIndex(launch);
int targetIndex = getTargetIndex(target);
int stackFrameIndex = getStackFrameIndex(frame);
ModelDelta delta = new ModelDelta(manager, IModelDelta.NO_CHANGE);
ModelDelta node = delta.addNode(launch, launchIndex, IModelDelta.NO_CHANGE, target.getLaunch().getChildren().length);
node = node.addNode(target, targetIndex, IModelDelta.NO_CHANGE, threads.length);
node = node.addNode(chosen, threadIndex, IModelDelta.NO_CHANGE | IModelDelta.EXPAND, chosen.getStackFrames().length);
node = node.addNode(frame, stackFrameIndex, IModelDelta.NO_CHANGE | IModelDelta.SELECT, 0);
return delta;
}
}
} catch (DebugException e) {
}
}
return null;
}
/**
* Computes the index of a launch at top level in the {@code Debug View} tree.
*
* @param launch The launch for which to compute the index.
*
* @return The index of the specified launch at top level in the
* {@code Debug View}.
*/
protected int getLaunchIndex(ILaunch launch) {
ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
return indexOf(manager.getLaunches(), launch);
}
/**
* Computes the index of a debug target in its parent launch. The debug target
* index corresponds to the index in {@code Debug View} tree.
*
* @param target The debug target for which to compute the index.
*
* @return The index of the specified debug target in its launch.
*/
protected int getTargetIndex(IDebugTarget target) {
return indexOf(target.getLaunch().getChildren(), target);
}
/**
* Computes the index of a stack frame in the thread suspended at that stack
* frame. The stack frame index corresponds to the index in {@code Debug View}
* tree.
*
* @param stackFrame The stack frame for which to compute the index.
*
* @return The index of the specified stack frame in its parent thread.
*/
protected int getStackFrameIndex(IStackFrame stackFrame) {
return 0;
}
}
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