FileSystemRefreshAction.java

/**
 * This file Copyright (c) 2005-2010 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.ui.io.navigator.actions;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.actions.BaseSelectionListenerAction;

import com.aptana.ide.ui.io.IOUIPlugin;

/**
 * @author Michael Xia (mxia@aptana.com)
 */
public class FileSystemRefreshAction extends BaseSelectionListenerAction {

    private Object[] fSelectedElements;

    public FileSystemRefreshAction() {
        super(Messages.FileSystemRefreshAction_Text);
        setImageDescriptor(IOUIPlugin
                .getImageDescriptor("/icons/full/etool16/refresh.png")); //$NON-NLS-1$
        setToolTipText(Messages.FileSystemRefreshAction_ToolTip);
    }

    public void run() {
        if (fSelectedElements == null) {
            return;
        }
        for (Object element : fSelectedElements) {
            IOUIPlugin.refreshNavigatorView(element);
        }
    }

    protected boolean updateSelection(IStructuredSelection selection) {
        fSelectedElements = null;
        if (selection != null && !selection.isEmpty()) {
            fSelectedElements = selection.toArray();
        }
        return super.updateSelection(selection) && fSelectedElements != null;
    }
}