/*
 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing.filechooser;

import java.awt.Image;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.UIManager;
import sun.awt.shell.ShellFolder;
import java.io.File;
import java.io.FileNotFoundException;

/**
 * SystemIcon is JFileChooser's gateway to the
 * file system icons.
 *
 * <p>
 *
 * @author shashidhara
 */
public class SystemIcon {

   /**
    * Icon for a file, directory, or folder as it would be displayed in
    * a system file browser for the requested size.
    *
    * The default implementation gets information from the ShellFolder class.
    *
    * @param f a <code>File</code> object
    * @param size width and height of the icon in pixels to be scaled(valid range: 1 to 256)
    * @return an icon as it would be displayed by a native file chooser
    * @see JFileChooser#getIcon
    * @since 12
    */
    static public Icon getSystemIcon(File f, int size) {
       if (f == null) {
           return null;
       }

       if (size > 256 || size < 1) {
           return null;
       }

       ShellFolder sf;
       try {
           sf = ShellFolder.getShellFolder(f);
       } catch (FileNotFoundException e) {
           return null;
       } catch (InternalError e) {
            System.err.println("FileSystemView.getShellFolder: f="+f);
            e.printStackTrace();
            return null;
       }

       Image img = sf.getIcon(size);
       if (img != null) {
           return new ImageIcon(img, sf.getFolderType());
       } else {
           return UIManager.getIcon(f.isDirectory() ? "FileView.directoryIcon" : "FileView.fileIcon");
       }
    }
}