/*******************************************************************************
* Copyright (c) 2000, 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
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.util;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
public class SelectionUtil {
/**
* Returns the selected element if the selection consists of a single element only.
*
* @param s the selection
* @return the selected first element or null
*/
public static Object getSingleElement(ISelection s) {
if (!(s instanceof IStructuredSelection))
return null;
IStructuredSelection selection= (IStructuredSelection) s;
if (selection.size() != 1)
return null;
return selection.getFirstElement();
}
/**
* Returns the selection in the currently active workbench window part.
* If the no selection exists or no selection exists in the active part <code>null</code> is returned.
*
* @return the current selection in the active workbench window part or null
*/
public static ISelection getActiveSelection() {
ISelection selection = null;
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window != null) {
IWorkbenchPage activePage = window.getActivePage();
if (activePage != null) {
IWorkbenchPart activePart = activePage.getActivePart();
if (activePart != null) {
selection = window.getSelectionService().getSelection(activePart.getSite().getId());
}
}
}
return selection;
}
}