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
26package 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 */
33class 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}
74