Content of file RefreshViewerAction.java

/********************************************************************************
 * Copyright (c) 2011 Eike Stepper (Berlin, Germany) and others.
 *
 * All rights reserved. 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:
 * Eike Stepper - initial API and implementation
 ********************************************************************************/
package org.eclipse.emf.ecp.ui.actions;

import org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider;
import org.eclipse.emf.ecp.ui.e3.Messages;
import org.eclipse.emf.ecp.ui.platform.Activator;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;

/**
 * @author Eike Stepper
 */
public class RefreshViewerAction extends Action {
	private final Viewer viewer;

	/**
	 * Action to refresh a viewer.
	 *
	 * @param viewer the {@link Viewer} to be refreshed.
	 */
	public RefreshViewerAction(Viewer viewer) {
		super(Messages.RefreshViewerAction_Title, Activator.getImageDescriptor("icons/refresh.gif")); //$NON-NLS-1$
		setToolTipText(Messages.RefreshViewerAction_Tooltip);
		this.viewer = viewer;
	}

	@Override
	public void run() {
		if (viewer instanceof StructuredViewer) {
			final StructuredViewer structuredViewer = (StructuredViewer) viewer;
			final IContentProvider contentProvider = structuredViewer.getContentProvider();
			if (contentProvider instanceof TreeContentProvider) {
				final TreeContentProvider<?> treeContentProvider = (TreeContentProvider<?>) contentProvider;
				treeContentProvider.refreshViewer();
				return;
			}
		}

		viewer.refresh();
	}
}