1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.lwawt;
  27 
  28 import java.awt.Component;
  29 import java.awt.KeyboardFocusManager;
  30 import java.awt.Window;
  31 
  32 import java.util.Map;
  33 import java.util.HashMap;
  34 
  35 import sun.awt.AWTAccessor;
  36 import sun.awt.AppContext;
  37 import sun.awt.KeyboardFocusManagerPeerImpl;
  38 
  39 public class LWKeyboardFocusManagerPeer extends KeyboardFocusManagerPeerImpl {
  40 
  41     private Object lock = new Object();
  42     private LWWindowPeer focusedWindow;
  43     private LWComponentPeer focusOwner;
  44 
  45     private static Map<KeyboardFocusManager, LWKeyboardFocusManagerPeer> instances =
  46         new HashMap<KeyboardFocusManager, LWKeyboardFocusManagerPeer>();
  47 
  48     public static synchronized LWKeyboardFocusManagerPeer getInstance(AppContext ctx) {
  49         return getInstance(AWTAccessor.getKeyboardFocusManagerAccessor().
  50                            getCurrentKeyboardFocusManager(ctx));
  51     }
  52 
  53     public static synchronized LWKeyboardFocusManagerPeer getInstance(KeyboardFocusManager manager) {
  54         LWKeyboardFocusManagerPeer instance = instances.get(manager);
  55         if (instance == null) {
  56             instance = new LWKeyboardFocusManagerPeer(manager);
  57             instances.put(manager, instance);
  58         }
  59         return instance;
  60     }
  61 
  62     public LWKeyboardFocusManagerPeer(KeyboardFocusManager manager) {
  63         super(manager);
  64     }
  65 
  66     @Override
  67     public Window getCurrentFocusedWindow() {
  68         synchronized (lock) {
  69             return (focusedWindow != null) ? (Window)focusedWindow.getTarget() : null;
  70         }
  71     }
  72 
  73     @Override
  74     public Component getCurrentFocusOwner() {
  75         synchronized (lock) {
  76             return (focusOwner != null) ? focusOwner.getTarget() : null;
  77         }
  78     }
  79 
  80     @Override
  81     public void setCurrentFocusOwner(Component comp) {
  82         synchronized (lock) {
  83             focusOwner = (comp != null) ? (LWComponentPeer)comp.getPeer() : null;
  84         }
  85     }
  86 
  87     void setFocusedWindow(LWWindowPeer peer) {
  88         synchronized (lock) {
  89             focusedWindow = peer;
  90         }
  91     }
  92 
  93     LWWindowPeer getFocusedWindow() {
  94         synchronized (lock) {
  95             return focusedWindow;
  96         }
  97     }
  98 
  99     void setFocusOwner(LWComponentPeer peer) {
 100         synchronized (lock) {
 101             focusOwner = peer;
 102         }
 103     }
 104 
 105     LWComponentPeer getFocusOwner() {
 106         synchronized (lock) {
 107             return focusOwner;
 108         }
 109     }
 110 }