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 XRootWindow xawtRootWindow = null;
  35     static XRootWindow getInstance() {
  36         XToolkit.awtLock();
  37         try {
  38             if (xawtRootWindow == null) {
  39                 xawtRootWindow = new XRootWindow();
  40                 xawtRootWindow.init(xawtRootWindow.getDelayedParams().delete(DELAYED));
  41             }
  42             return xawtRootWindow;
  43         } finally {
  44             XToolkit.awtUnlock();
  45         }
  46     }
  47 
  48     private XRootWindow() {
  49         super(new XCreateWindowParams(new Object[] { DELAYED, Boolean.TRUE,
  50                                                      EVENT_MASK, XConstants.StructureNotifyMask }));
  51     }
  52 
  53     public void postInit(XCreateWindowParams params){
  54         super.postInit(params);
  55         setWMClass(getWMClass());
  56     }
  57 
  58     protected String getWMName() {
  59         return XToolkit.getAWTAppClassName();
  60     }
  61     protected String[] getWMClass() {
  62         return new String[] {XToolkit.getAWTAppClassName(), XToolkit.getAWTAppClassName()};
  63     }
  64 
  65   /* Fix 4976517.  Return awt_root_shell to XToolkit.c */
  66     private static long getXRootWindow() {
  67         return getXAWTRootWindow().getWindow();
  68     }
  69 }