content: /*
   * Created on Jun 24, 2008
   * 
   * 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 @2008-2013 the original author or authors.
   */
  package org.fest.swing.input;
  
  import static java.awt.event.WindowEvent.WINDOW_CLOSED;
  import static java.awt.event.WindowEvent.WINDOW_CLOSING;
  import static org.fest.util.Maps.newWeakHashMap;
  
  import java.awt.AWTEvent;
  import java.awt.Window;
  import java.awt.event.WindowEvent;
  import java.util.Map;
  
  /**
   * Verifies that a notification of the disposal of an AWT or Swing {@code Window} is not duplicated.
   * 
   * @author Alex Ruiz
   */
  class DisposedWindowMonitor {
    final Map<Window, Boolean> disposedWindows = newWeakHashMap();
  
    // We want to ignore consecutive event indicating window disposal; it needs to be an intervening SHOWN/OPEN before
    // we're interested again.
    boolean isDuplicateDispose(AWTEvent event) {
      if (!(event instanceof WindowEvent)) {
        return false;
      }
      WindowEvent windowEvent = (WindowEvent) event;
      int eventId = windowEvent.getID();
      if (eventId == WINDOW_CLOSING) {
        return false;
      }
      if (eventId == WINDOW_CLOSED) {
        Window w = windowEvent.getWindow();
        if (disposedWindows.containsKey(w)) {
          return true;
        }
        disposedWindows.put(w, true);
        // execute(addComponentListenerTask(w, new DisposalMonitor(disposedWindows)));
        w.addComponentListener(new DisposalMonitor(disposedWindows));
        return false;
      }
      disposedWindows.remove(windowEvent.getWindow());
      return false;
    }
  }
  