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 }