1 /*
   2  * Copyright (c) 2003, 2014, 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.awt.X11;
  27 
  28 /**
  29  * This class represents AWT application root window functionality.
  30  * Object of this class is singleton, all window reference it to have
  31  * common logical ancestor
  32  */
  33 class XRootWindow extends XBaseWindow {
  34     private static class LazyHolder {
  35         private static final XRootWindow xawtRootWindow;
  36 
  37         static {
  38             XToolkit.awtLock();
  39             try {
  40                 xawtRootWindow = new XRootWindow();
  41                 xawtRootWindow.init(xawtRootWindow.getDelayedParams().delete(DELAYED));
  42             } finally {
  43                 XToolkit.awtUnlock();
  44             }
  45         }
  46 
  47     }
  48     static XRootWindow getInstance() {
  49         return LazyHolder.xawtRootWindow;
  50     }
  51 
  52     private XRootWindow() {
  53         super(new XCreateWindowParams(new Object[] { DELAYED, Boolean.TRUE,
  54                                                      EVENT_MASK, XConstants.StructureNotifyMask }));
  55     }
  56 
  57     public void postInit(XCreateWindowParams params){
  58         super.postInit(params);
  59         setWMClass(getWMClass());
  60     }
  61 
  62     protected String getWMName() {
  63         return XToolkit.getAWTAppClassName();
  64     }
  65     protected String[] getWMClass() {
  66         return new String[] {XToolkit.getAWTAppClassName(), XToolkit.getAWTAppClassName()};
  67     }
  68 
  69   /* Fix 4976517.  Return awt_root_shell to XToolkit.c */
  70     private static long getXRootWindow() {
  71         return getXAWTRootWindow().getWindow();
  72     }
  73 }