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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* 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.
*/
package net.java.sip.communicator.plugin.desktoputil;
import java.awt.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.List;
/**
* Utility class for awt windows management.
*
* @author Yana Stamcheva
*/
public class WindowUtils
{
/**
* The list of all <tt>Window</tt>s owned by this application.
*/
private static final List<Window> WINDOW_LIST;
static
{
/*
* WINDOW_LIST is flawed because there are more calls to addWindow than
* to removeWindow. Java 6 has introduced Window#getWindows so try to
* use it instead.
*/
Method Window_getWindows = null;
try
{
Window_getWindows = Window.class.getMethod("getWindows");
}
catch (NoSuchMethodException nsme)
{
/*
* Ignore the exception because we are just checking whether the
* method exists.
*/
}
catch (SecurityException se)
{
}
WINDOW_LIST
= (Window_getWindows == null) ? new ArrayList<Window>() : null;
}
/**
* Returns an array of all {@code Window}s, both owned and ownerless,
* created by this application.
* If called from an applet, the array includes only the {@code Window}s
* accessible by that applet.
* <p>
* <b>Warning:</b> this method may return system created windows, such
* as a print dialog. Applications should not assume the existence of
* these dialogs, nor should an application assume anything about these
* dialogs such as component positions, <code>LayoutManager</code>s
* or serialization.
*
* @return Returns an array of all {@code Window}s.
*/
public static Window[] getWindows()
{
if (WINDOW_LIST == null)
{
Method Window_getWindows = null;
try
{
Window_getWindows = Window.class.getMethod("getWindows");
}
catch (NoSuchMethodException nsme)
{
/* Ignore it because we cannot really do anything useful. */
}
catch (SecurityException se)
{
}
Object windows = null;
if (Window_getWindows != null)
{
try
{
windows = Window_getWindows.invoke(null);
}
catch (ExceptionInInitializerError eiie)
{
/* Ignore it because we cannot really do anything useful. */
}
catch (IllegalAccessException iae)
{
}
catch (IllegalArgumentException iae)
{
}
catch (InvocationTargetException ite)
{
}
catch (NullPointerException npe)
{
}
}
return
(windows instanceof Window[])
? (Window[]) windows
: new Window[0];
}
else
{
synchronized (WINDOW_LIST)
{
return WINDOW_LIST.toArray(new Window[WINDOW_LIST.size()]);
}
}
}
/**
* Adds a {@link Window} into window list
*
* @param w {@link Window} to be added.
*/
public static void addWindow(Window w)
{
if (WINDOW_LIST != null)
{
synchronized (WINDOW_LIST)
{
if (!WINDOW_LIST.contains(w))
WINDOW_LIST.add(w);
}
}
}
/**
* Removes a {@link Window} into window list
*
* @param w {@link Window} to be removed.
*/
public static void removeWindow(Window w)
{
if (WINDOW_LIST != null)
{
synchronized (WINDOW_LIST)
{
WINDOW_LIST.remove(w);
}
}
}
}
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