content: /*
   * Created on Oct 24, 2007
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
   * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
   * specific language governing permissions and limitations under the License.
   *
   * Copyright @2007-2013 the original author or authors.
   */
  package org.fest.swing.hierarchy;
  
  import static org.fest.util.Lists.emptyList;
  import static org.fest.util.Lists.newArrayList;
  
  import java.awt.Component;
  import java.awt.Container;
  import java.util.Collection;
  
  import javax.annotation.Nonnull;
  import javax.swing.JDesktopPane;
  import javax.swing.JInternalFrame;
  import javax.swing.JInternalFrame.JDesktopIcon;
  
  import org.fest.swing.annotation.RunsInCurrentThread;
  
  /**
   * Finds children {@code Component}s in a {@code JDesktopPane}.
   *
   * @author Yvonne Wang
   */
  final class JDesktopPaneChildrenFinder implements ChildrenFinderStrategy {
    @Override
    @RunsInCurrentThread
    public @Nonnull Collection<Component> nonExplicitChildrenOf(@Nonnull Container c) {
      if (!(c instanceof JDesktopPane)) {
        return emptyList();
      }
      return internalFramesFromIcons(c);
    }
  
    // From Abbot: add iconified frames, which are otherwise unreachable. For consistency, they are still considered
    // children of the desktop pane.
    @RunsInCurrentThread
    private @Nonnull Collection<Component> internalFramesFromIcons(@Nonnull Container c) {
      Collection<Component> frames = newArrayList();
      for (Component child : c.getComponents()) {
        if (child instanceof JDesktopIcon) {
          JInternalFrame frame = ((JDesktopIcon) child).getInternalFrame();
          if (frame != null) {
            frames.add(frame);
          }
          continue;
        }
        // OSX puts icons into a dock; handle icon manager situations here
        if (child instanceof Container) {
          frames.addAll(internalFramesFromIcons((Container) child));
        }
      }
      return frames;
    }
  }
  