/*

 * Copyright 2003-2008 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.awt.X11;

import java.awt.Component;

import java.awt.KeyboardFocusManager;

import java.awt.Window;

import java.awt.event.FocusEvent;

import java.awt.peer.KeyboardFocusManagerPeer;

import java.awt.peer.ComponentPeer;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.logging.Level;

import java.util.logging.Logger;

import sun.awt.CausedFocusEvent;

import sun.awt.SunToolkit;

import sun.awt.KeyboardFocusManagerPeerImpl;

public class XKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {

    private static final Logger focusLog = Logger.getLogger("sun.awt.X11.focus.XKeyboardFocusManagerPeer");

    private static Object lock = new Object() {};

    private static Component currentFocusOwner;

    private static Window currentFocusedWindow;

    XKeyboardFocusManagerPeer(KeyboardFocusManager manager) {

        super(manager);

    }

    @Override

    public void setCurrentFocusOwner(Component comp) {

        setCurrentNativeFocusOwner(comp);

    }

    @Override

    public Component getCurrentFocusOwner() {

        return getCurrentNativeFocusOwner();

    }

    @Override

    public Window getCurrentFocusedWindow() {

        return getCurrentNativeFocusedWindow();

    }

    public static void setCurrentNativeFocusOwner(Component comp) {

        synchronized (lock) {

            currentFocusOwner = comp;

        }

    }

    public static Component getCurrentNativeFocusOwner() {

        synchronized(lock) {

            return currentFocusOwner;

        }

    }

    public static void setCurrentNativeFocusedWindow(Window win) {

        if (focusLog.isLoggable(Level.FINER)) focusLog.finer("Setting current native focused window " + win);

        XWindowPeer from = null, to = null;

        synchronized(lock) {

            if (currentFocusedWindow != null) {

                from = (XWindowPeer)currentFocusedWindow.getPeer();

            }

            currentFocusedWindow = win;

            if (currentFocusedWindow != null) {

                to = (XWindowPeer)currentFocusedWindow.getPeer();

            }

        }

        if (from != null) {

            from.updateSecurityWarningVisibility();

        }

        if (to != null) {

            to.updateSecurityWarningVisibility();

        }

    }

    public static Window getCurrentNativeFocusedWindow() {

        synchronized(lock) {

            return currentFocusedWindow;

        }

    }

    // TODO: do something to eliminate this forwarding

    public static boolean deliverFocus(Component lightweightChild,

                                       Component target,

                                       boolean temporary,

                                       boolean focusedWindowChangeAllowed,

                                       long time,

                                       CausedFocusEvent.Cause cause)

    {

        return KeyboardFocusManagerPeerImpl.deliverFocus(lightweightChild,

                                                         target,

                                                         temporary,

                                                         focusedWindowChangeAllowed,

                                                         time,

                                                         cause,

                                                         getCurrentNativeFocusOwner());

    }

}