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/*****************************************************************************
* Copyright (c) 2014 CEA LIST 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:
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.ui.util;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
/**
* @author VL222926
*
*/
public class SelectionHelper {
/**
* Constructor.
*
*/
private SelectionHelper() {
// to avoid instanciation
}
/**
*
* @return
* the selection service or <code>null</code> if not found
*
*/
public static final ISelectionService getSelectionService() {
IWorkbench wb = PlatformUI.getWorkbench();
if (wb != null) {
// don't work
// ISelectionService s1 = (ISelectionService) wb.getService(ISelectionService.class);
IWorkbenchWindow ww = wb.getActiveWorkbenchWindow();
if (ww != null) {
return (ISelectionService) ww.getService(ISelectionService.class);
}
}
return null;
}
/**
*
* @return
* the current selection or an empty selection. can't be <code>null</code>
*/
public static final ISelection getCurrentSelection() {
ISelectionService selectionService = getSelectionService();
if (selectionService != null) {
ISelection currentSelection = selectionService.getSelection();
if (currentSelection != null) {
return currentSelection;
}
}
return StructuredSelection.EMPTY;
}
/**
*
* @param viewId
* the id of the view for which we want the selection
* @return
* the current selection for the view, the returned value can't be <code>null</code>
*/
public static final ISelection getCurrentSelection(String viewId) {
ISelectionService selectionService = getSelectionService();
if (selectionService != null) {
ISelection currentSelection = selectionService.getSelection(viewId);
if (currentSelection != null) {
return currentSelection;
}
}
return StructuredSelection.EMPTY;
}
/**
*
* @return
* a structured selection.
* the returned value can't be <code>null</code>
*/
public static final IStructuredSelection getCurrentStructuredSelection() {
ISelection selection = getCurrentSelection();
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
return StructuredSelection.EMPTY;
}
/**
*
* @param viewId
* the id of the view for which we want the selection
* @return
* the current selection for the view, the returned value can't be <code>null</code>
*/
public static final IStructuredSelection getCurrentStructuredSelection(String viewId) {
ISelection selection = getCurrentSelection(viewId);
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
return StructuredSelection.EMPTY;
}
}
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