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/*******************************************************************************
* Copyright (c) 2000, 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
* Wind River Systems - integration with non-standard debug models (Bug 209883)
*******************************************************************************/
package org.eclipse.debug.internal.ui.actions.expressions;
import java.util.Iterator;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IWatchExpression;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
/**
* Ask to re-evaluate one or more watch expressions in the context of the
* currently selected thread.
*/
public class ReevaluateWatchExpressionAction implements IObjectActionDelegate {
@Override
public void setActivePart(IAction action, IWorkbenchPart targetPart) {
}
/**
* Finds the currently selected context in the UI.
* @return the current debug context
*/
protected IDebugElement getContext() {
IAdaptable object = DebugUITools.getDebugContext();
IDebugElement context = null;
if (object instanceof IDebugElement) {
context = (IDebugElement) object;
} else if (object instanceof ILaunch) {
context = ((ILaunch) object).getDebugTarget();
}
return context;
}
protected IStructuredSelection getCurrentSelection() {
IWorkbenchPage page = DebugUIPlugin.getActiveWorkbenchWindow().getActivePage();
if (page != null) {
ISelection selection = page.getSelection();
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
}
return null;
}
/**
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
@Override
public void run(IAction action) {
IDebugElement context = getContext();
for (Iterator<?> iter = getCurrentSelection().iterator(); iter.hasNext();) {
IWatchExpression expression= (IWatchExpression) iter.next();
expression.setExpressionContext(context);
if (!expression.isEnabled()) {
// Force a reevaluation
expression.evaluate();
}
}
}
@Override
public void selectionChanged(IAction action, ISelection selection) {
IDebugElement debugElement = getContext();
if (debugElement == null) {
action.setEnabled(false);
} else {
action.setEnabled(true);
}
}
}
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