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/*******************************************************************************
* Copyright (c) 2010, 2012 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.internal.cdt.ui.hover;
import java.util.Map;
import org.eclipse.cdt.debug.ui.editors.AbstractDebugTextHover;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.text.DefaultInformationControl;
import org.eclipse.jface.text.IInformationControl;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextHoverExtension2;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.tcf.internal.debug.ui.model.TCFChildren;
import org.eclipse.tcf.internal.debug.ui.model.TCFChildrenStackTrace;
import org.eclipse.tcf.internal.debug.ui.model.TCFNode;
import org.eclipse.tcf.internal.debug.ui.model.TCFNodeExecContext;
import org.eclipse.tcf.internal.debug.ui.model.TCFNodeExpression;
import org.eclipse.tcf.internal.debug.ui.model.TCFNodeStackFrame;
import org.eclipse.tcf.internal.debug.ui.model.TCFNumberFormat;
import org.eclipse.tcf.protocol.IChannel;
import org.eclipse.tcf.protocol.IToken;
import org.eclipse.tcf.services.IExpressions;
import org.eclipse.tcf.services.IExpressions.DoneCreate;
import org.eclipse.tcf.services.IExpressions.DoneDispose;
import org.eclipse.tcf.services.IExpressions.DoneEvaluate;
import org.eclipse.tcf.services.IExpressions.Expression;
import org.eclipse.tcf.services.IExpressions.Value;
import org.eclipse.tcf.util.TCFDataCache;
import org.eclipse.tcf.util.TCFTask;
/**
* TCF implementation of debug expression hover for the C/C++ Editor.
*/
public class TCFDebugTextHover extends AbstractDebugTextHover implements ITextHoverExtension2 {
@Override
public IInformationControlCreator getHoverControlCreator() {
if (useExpressionExplorer()) {
return createExpressionInformationControlCreator();
}
else {
return new IInformationControlCreator() {
public IInformationControl createInformationControl(Shell parent) {
return new DefaultInformationControl(parent, false);
}
};
}
}
private IInformationControlCreator createExpressionInformationControlCreator() {
return new ExpressionInformationControlCreator();
}
protected boolean useExpressionExplorer() {
return true;
}
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
if (!useExpressionExplorer()) return getHoverInfo(textViewer, hoverRegion);
final TCFNodeStackFrame activeFrame = getActiveFrame();
if (activeFrame == null) return null;
final String text = getExpressionText(textViewer, hoverRegion);
if (text == null || text.length() == 0) return null;
try {
return new TCFTask<TCFNode>(activeFrame.getChannel()) {
public void run() {
TCFNode evalContext = activeFrame.isEmulated() ? activeFrame.getParent() : activeFrame;
TCFChildren cache = evalContext.getModel().getHoverExpressionCache(evalContext, text);
if (!cache.validate(this)) return;
Map<String,TCFNode> nodes = cache.getData();
if (nodes != null) {
for (TCFNode node : nodes.values()) {
TCFDataCache<IExpressions.Value> value = ((TCFNodeExpression)node).getValue();
if (!value.validate(this)) return;
if (value.getData() != null) {
done(node.getParent());
return;
}
}
}
done(null);
}
}.get();
}
catch (Exception x) {
// Problem in Eclipse 3.7:
// TextViewerHoverManager calls Thread.interrupt(),
// but it fails to handle InterruptedException.
// We have to catch and ignore the exception.
return null;
}
}
@Override
protected boolean canEvaluate() {
return getActiveFrame() != null;
}
private TCFNodeStackFrame getActiveFrame() {
IAdaptable context = getSelectionAdaptable();
if (context instanceof TCFNodeStackFrame) return (TCFNodeStackFrame) context;
if (context instanceof TCFNodeExecContext) {
try {
final TCFNodeExecContext exe = (TCFNodeExecContext) context;
return new TCFTask<TCFNodeStackFrame>(exe.getChannel()) {
public void run() {
TCFChildrenStackTrace stack = exe.getStackTrace();
if (!stack.validate(this)) return;
done(stack.getTopFrame());
}
}.get();
}
catch (Exception x) {
// Problem in Eclipse 3.7:
// TextViewerHoverManager calls Thread.interrupt(),
// but it fails to handle InterruptedException.
// We have to catch and ignore the exception.
return null;
}
}
return null;
}
@Override
protected String evaluateExpression(final String expression) {
final TCFNodeStackFrame activeFrame = getActiveFrame();
if (activeFrame == null) return null;
final IChannel channel = activeFrame.getChannel();
return new TCFTask<String>(channel) {
public void run() {
final IExpressions exprSvc = channel.getRemoteService(IExpressions.class);
if (exprSvc != null) {
TCFNode evalContext = activeFrame.isEmulated() ? activeFrame.getParent() : activeFrame;
exprSvc.create(evalContext.getID(), null, expression, new DoneCreate() {
public void doneCreate(IToken token, Exception error, final Expression context) {
if (error == null) {
exprSvc.evaluate(context.getID(), new DoneEvaluate() {
public void doneEvaluate(IToken token, Exception error, Value value) {
done(error == null && value != null ? getValueText(value) : null);
exprSvc.dispose(context.getID(), new DoneDispose() {
public void doneDispose(IToken token, Exception error) {
// no-op
}
});
}
});
}
else {
done(null);
}
}
});
}
else {
done(null);
}
}
}.getE();
}
private static String getValueText(Value value) {
byte[] data = value.getValue();
if (data == null) return "N/A";
switch(value.getTypeClass()) {
case integer:
return TCFNumberFormat.toBigInteger(data, value.isBigEndian(), true).toString();
case real:
return TCFNumberFormat.toFPString(data, value.isBigEndian());
case complex:
return TCFNumberFormat.toComplexFPString(data, value.isBigEndian());
default:
return "0x" + TCFNumberFormat.toBigInteger(data, value.isBigEndian(), false).toString(16);
}
}
}
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