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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
* WindRiver - Bug 192028 [Memory View] Memory view does not
* display memory blocks that do not reference IDebugTarget
*
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.update;
import java.util.Iterator;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IMemoryBlockListener;
import org.eclipse.debug.core.model.IMemoryBlock;
import org.eclipse.debug.core.model.IMemoryBlockRetrieval;
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.model.provisional.ModelDelta;
import org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy;
import org.eclipse.debug.internal.ui.views.memory.MemoryViewUtil;
import org.eclipse.debug.ui.memory.IMemoryRendering;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.ui.progress.UIJob;
public class MemoryRetrievalProxy extends AbstractModelProxy implements IMemoryBlockListener {
private IMemoryBlockRetrieval fRetrieval;
public MemoryRetrievalProxy(IMemoryBlockRetrieval retrieval) {
fRetrieval = retrieval;
}
@Override
public void memoryBlocksAdded(IMemoryBlock[] memory) {
IMemoryBlock[] allMB = DebugPlugin.getDefault().getMemoryBlockManager().getMemoryBlocks(fRetrieval);
int lastIndex = allMB.length - memory.length;
ModelDelta delta = new ModelDelta(fRetrieval, 0, IModelDelta.NO_CHANGE, allMB.length);
for (int i = 0; i < memory.length; i++) {
IMemoryBlockRetrieval retrieval = MemoryViewUtil.getMemoryBlockRetrieval(memory[i]);
if (retrieval != null) {
if (retrieval == fRetrieval) {
// select the newly added memory block
delta.addNode(memory[i], lastIndex + i, IModelDelta.ADDED | IModelDelta.SELECT, 0);
}
}
}
fireModelChanged(delta);
}
@Override
public void memoryBlocksRemoved(final IMemoryBlock[] memory) {
UIJob job = new UIJob("memory blocks removed") { //$NON-NLS-1$
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
ModelDelta delta = new ModelDelta(fRetrieval, IModelDelta.NO_CHANGE);
// find a memory block to select
for (int i = 0; i < memory.length; i++) {
IMemoryBlockRetrieval retrieval = MemoryViewUtil.getMemoryBlockRetrieval(memory[i]);
if (retrieval != null) {
if (retrieval == fRetrieval) {
// do not change selection if the memory block
// removed is not
// currently selected
// #getCurrentSelection must be run on the UI thread
if (isMemoryBlockSelected(getCurrentSelection(), memory[i])) {
addSelectDeltaNode(delta);
}
delta.addNode(memory[i], IModelDelta.REMOVED);
}
}
}
fireModelChanged(delta);
return Status.OK_STATUS;
}
};
job.setSystem(true);
job.schedule();
}
@Override
public void init(IPresentationContext context) {
super.init(context);
DebugPlugin.getDefault().getMemoryBlockManager().addListener(this);
}
@Override
public void installed(Viewer viewer) {
super.installed(viewer);
// Set the initial selection when the proxy is installed
// Otherwise, rendering pane cannot be populated.
setInitialSelection();
}
/**
* Set the initial memory block selection when the proxy is installed. This
* is done to ensure that when the memory view is opened, there is an
* initial selection. Otherwise, the Rendering Pane will show up as blank.
*
* @since 3.4
*/
protected void setInitialSelection() {
IMemoryBlock[] allMB = DebugPlugin.getDefault().getMemoryBlockManager().getMemoryBlocks(fRetrieval);
if (allMB.length > 0) {
ModelDelta delta = new ModelDelta(fRetrieval, 0, IModelDelta.NO_CHANGE, allMB.length);
delta.addNode(allMB[0], 0, IModelDelta.SELECT, 0);
fireModelChanged(delta);
}
}
@Override
public synchronized void dispose() {
super.dispose();
DebugPlugin.getDefault().getMemoryBlockManager().removeListener(this);
}
private void addSelectDeltaNode(ModelDelta delta) {
IMemoryBlock[] memoryBlocks = DebugPlugin.getDefault().getMemoryBlockManager().getMemoryBlocks(fRetrieval);
if (memoryBlocks != null && memoryBlocks.length > 0) {
delta.addNode(memoryBlocks[0], IModelDelta.SELECT);
}
}
private IStructuredSelection getCurrentSelection() {
Viewer viewer = getViewer();
if (viewer instanceof StructuredViewer) {
StructuredViewer sv = (StructuredViewer) viewer;
ISelection selection = sv.getSelection();
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
}
return StructuredSelection.EMPTY;
}
private boolean isMemoryBlockSelected(IStructuredSelection selection, IMemoryBlock memoryBlock) {
if (!selection.isEmpty()) {
Iterator<?> iter = selection.iterator();
while (iter.hasNext()) {
Object sel = iter.next();
if (sel == memoryBlock) {
return true;
}
if (sel instanceof IMemoryRendering) {
if (((IMemoryRendering) sel).getMemoryBlock() == memoryBlock) {
return true;
}
}
}
}
return false;
}
}
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