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/*******************************************************************************
* Copyright (c) 2000, 2015 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
* Wind River Systems - integration with non-standard debug models (Bug 209883)
*******************************************************************************/
package org.eclipse.debug.internal.ui.actions.expressions;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
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.action.IStatusLineManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
/**
* Generic abstract class for the actions associated to the java watch
* expressions.
*/
public abstract class WatchExpressionAction implements IViewActionDelegate {
IWorkbenchPart fPart = null;
private static IWatchExpression[] EMPTY_EXPRESSION_ARRAY = new IWatchExpression[0];
@Override
public void init(IViewPart view) {
fPart = view;
}
/**
* 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 IWatchExpression[] getSelectedExpressions() {
List<Object> list = new LinkedList<>();
IStructuredSelection currentSelection = getCurrentSelection();
if (currentSelection == null) {
return EMPTY_EXPRESSION_ARRAY;
}
for (Iterator<?> iter= currentSelection.iterator(); iter.hasNext();) {
Object element = iter.next();
if (element instanceof IWatchExpression) {
list.add(element);
} else if (element instanceof IAdaptable) {
IWatchExpression expr = ((IAdaptable)element).getAdapter(IWatchExpression.class);
if (expr != null) {
list.add(expr);
} else {
return EMPTY_EXPRESSION_ARRAY;
}
} else {
return EMPTY_EXPRESSION_ARRAY;
}
}
return list.toArray(new IWatchExpression[list.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
*/
@Override
public void selectionChanged(IAction action, ISelection sel) {
}
protected IStructuredSelection getCurrentSelection() {
IWorkbenchPage page = DebugUIPlugin.getActiveWorkbenchWindow().getActivePage();
if (page != null) {
ISelection selection = page.getSelection();
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
}
return null;
}
/**
* Displays the given error message in the status line.
*
* @param message the message to display
*/
protected void showErrorMessage(String message) {
if (fPart instanceof IViewPart) {
IViewSite viewSite = ((IViewPart) fPart).getViewSite();
IStatusLineManager manager = viewSite.getActionBars().getStatusLineManager();
manager.setErrorMessage(message);
}
}
}
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