org.pentaho.ui.xul.util.SwtXulUtil.java Source code

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Here is the source code for org.pentaho.ui.xul.util.SwtXulUtil.java

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.ui.xul.util;

import java.io.InputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.pentaho.ui.xul.XulDomContainer;

public class SwtXulUtil {

    private static Log logger = LogFactory.getLog(SwtXulUtil.class);

    public static Image getCachedImage(String src, XulDomContainer container, Display display) {

        Image img = null;

        if (src == null) {
            return null;
        }

        if (JFaceResources.getImageRegistry().getDescriptor(src) != null) {
            img = JFaceResources.getImageRegistry().get(src);
        }

        if (img == null) {
            InputStream in = null;
            try {
                in = XulUtil.loadResourceAsStream(src, container);
                if (in != null) {
                    img = new Image(display, in);
                    JFaceResources.getImageRegistry().put(src, img);
                }
            } catch (Exception e) {
                logger.error(e);
            } finally {
                try {
                    in.close();
                } catch (Exception ignored) {
                }
            }
        }

        return img;
    }

}