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/*******************************************************************************
* Copyright (c) 2005, 2013 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
* Bjorn Freeman-Benson - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.examples.ui.pda.editor;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IThread;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.debug.examples.core.pda.model.PDADebugTarget;
import org.eclipse.debug.examples.core.pda.model.PDAStackFrame;
import org.eclipse.debug.examples.core.pda.model.PDAThread;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.ITextViewer;
/**
* Produces debug hover for the PDA debugger.
*/
public class TextHover implements ITextHover {
@Override
public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
String varName = null;
try {
varName = textViewer.getDocument().get(hoverRegion.getOffset(), hoverRegion.getLength());
} catch (BadLocationException e) {
return null;
}
if (varName.startsWith("$") && varName.length() > 1) { //$NON-NLS-1$
varName = varName.substring(1);
}
PDAStackFrame frame = null;
IAdaptable debugContext = DebugUITools.getDebugContext();
if (debugContext instanceof PDAStackFrame) {
frame = (PDAStackFrame) debugContext;
} else if (debugContext instanceof PDAThread) {
PDAThread thread = (PDAThread) debugContext;
try {
frame = (PDAStackFrame) thread.getTopStackFrame();
} catch (DebugException e) {
return null;
}
} else if (debugContext instanceof PDADebugTarget) {
PDADebugTarget target = (PDADebugTarget) debugContext;
try {
IThread[] threads = target.getThreads();
if (threads.length > 0) {
frame = (PDAStackFrame) threads[0].getTopStackFrame();
}
} catch (DebugException e) {
return null;
}
}
if (frame != null) {
try {
IVariable[] variables = frame.getVariables();
for (int i = 0; i < variables.length; i++) {
IVariable variable = variables[i];
if (variable.getName().equals(varName)) {
return varName + " = " + variable.getValue().getValueString(); //$NON-NLS-1$
}
}
} catch (DebugException e) {
}
}
return null;
}
@Override
public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
return WordFinder.findWord(textViewer.getDocument(), offset);
}
}
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