/*

 * Copyright (c) 2011, 2013, 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 sun.lwawt;

import java.awt.Component;

import java.awt.Window;

import sun.awt.KeyboardFocusManagerPeerImpl;

public class LWKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {

    private static final LWKeyboardFocusManagerPeer inst = new LWKeyboardFocusManagerPeer();

    private Window focusedWindow;

    private Component focusOwner;

    public static LWKeyboardFocusManagerPeer getInstance() {

        return inst;

    }

    private LWKeyboardFocusManagerPeer() {

    }

    @Override

    public void setCurrentFocusedWindow(Window win) {

        LWWindowPeer from, to;

        synchronized (this) {

            if (focusedWindow == win) {

                return;

            }

            from = (LWWindowPeer)LWToolkit.targetToPeer(focusedWindow);

            to = (LWWindowPeer)LWToolkit.targetToPeer(win);

            focusedWindow = win;

        }

        if (from != null) {

            from.updateSecurityWarningVisibility();

        }

        if (to != null) {

            to.updateSecurityWarningVisibility();

        }

    }

    @Override

    public Window getCurrentFocusedWindow() {

        synchronized (this) {

            return focusedWindow;

        }

    }

    @Override

    public Component getCurrentFocusOwner() {

        synchronized (this) {

            return focusOwner;

        }

    }

    @Override

    public void setCurrentFocusOwner(Component comp) {

        synchronized (this) {

            focusOwner = comp;

        }

    }

}