1 /*
2 * Copyright (c) 2003, 2013, 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 /*
27 * This code is ported to XAWT from MAWT based on awt_mgrsel.c
28 * and XSettings.java code written originally by Valeriy Ushakov
29 * Author : Bino George
30 */
31
32
33 package sun.awt.X11;
34
35 import java.util.*;
36 import java.awt.*;
37 import sun.awt.XSettings;
38 import sun.util.logging.PlatformLogger;
39
40
41 class XAWTXSettings extends XSettings implements XMSelectionListener {
42
43 private final XAtom xSettingsPropertyAtom = XAtom.get("_XSETTINGS_SETTINGS");
44
45 private static PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XAWTXSettings");
46
47 /* The maximal length of the property data. */
48 public static final long MAX_LENGTH = 1000000;
49
50 XMSelection settings;
51
52 public XAWTXSettings() {
53 initXSettings();
54
55 }
56
57 void initXSettings() {
58 if (log.isLoggable(PlatformLogger.Level.FINE)) {
59 log.fine("Initializing XAWT XSettings");
60 }
61 settings = new XMSelection("_XSETTINGS");
62 settings.addSelectionListener(this);
63 initPerScreenXSettings();
64 }
65
66 void dispose() {
67 settings.removeSelectionListener(this);
68 }
69
70 public void ownerDeath(int screen, XMSelection sel, long deadOwner) {
71 if (log.isLoggable(PlatformLogger.Level.FINE)) {
72 log.fine("Owner " + deadOwner + " died for selection " + sel + " screen "+ screen);
73 }
74 }
75
76
77 public void ownerChanged(int screen, XMSelection sel, long newOwner, long data, long timestamp) {
78 if (log.isLoggable(PlatformLogger.Level.FINE)) {
79 log.fine("New Owner "+ newOwner + " for selection = " + sel + " screen " +screen );
80 }
81 }
82
83 public void selectionChanged(int screen, XMSelection sel, long owner , XPropertyEvent event) {
84 if (log.isLoggable(PlatformLogger.Level.FINE)) {
85 log.fine("Selection changed on sel " + sel + " screen = " + screen + " owner = " + owner + " event = " + event);
86 }
87 updateXSettings(screen,owner);
88 }
89
90 void initPerScreenXSettings() {
91 if (log.isLoggable(PlatformLogger.Level.FINE)) {
92 log.fine("Updating Per XSettings changes");
93 }
94
95 /*
96 * As toolkit cannot yet cope with per-screen desktop properties,
97 * only report XSETTINGS changes on the default screen. This
98 * should be "good enough" for most cases.
99 */
100
101 Map updatedSettings = null;
102 XToolkit.awtLock();
103 try {
104 long display = XToolkit.getDisplay();
105 int screen = (int) XlibWrapper.DefaultScreen(display);
106 updatedSettings = getUpdatedSettings(settings.getOwner(screen));
107 } finally {
108 XToolkit.awtUnlock();
109 }
110 // we must not invoke this under Awt Lock
111 ((XToolkit)Toolkit.getDefaultToolkit()).parseXSettings(0,updatedSettings);
112 }
113
114 private void updateXSettings(int screen, long owner) {
115 final Map updatedSettings = getUpdatedSettings(owner);
116 // this method is called under awt lock and usually on toolkit thread
117 // but parseXSettings() causes public code execution, so we need to transfer
118 // this to EDT
119 EventQueue.invokeLater( new Runnable() {
120 public void run() {
121 ((XToolkit) Toolkit.getDefaultToolkit()).parseXSettings( 0, updatedSettings);
122 }
123 });
124 }
125
126 private Map getUpdatedSettings(final long owner) {
127 if (log.isLoggable(PlatformLogger.Level.FINE)) {
128 log.fine("owner =" + owner);
129 }
130 if (0 == owner) {
131 return null;
132 }
133
134 Map settings = null;
135 try {
136 WindowPropertyGetter getter =
137 new WindowPropertyGetter(owner, xSettingsPropertyAtom, 0, MAX_LENGTH,
138 false, xSettingsPropertyAtom.getAtom() );
139 try {
140 int status = getter.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
141
142 if (status != XConstants.Success || getter.getData() == 0) {
143 if (log.isLoggable(PlatformLogger.Level.FINE)) {
144 log.fine("OH OH : getter failed status = " + status );
145 }
146 settings = null;
147 }
148
149 long ptr = getter.getData();
150
151 if (log.isLoggable(PlatformLogger.Level.FINE)) {
152 log.fine("noItems = " + getter.getNumberOfItems());
153 }
154 byte array[] = Native.toBytes(ptr,getter.getNumberOfItems());
155 if (array != null) {
156 settings = update(array);
157 }
158 } finally {
159 getter.dispose();
160 }
161 }
162 catch (Exception e) {
163 e.printStackTrace();
164 }
165 return settings;
166 }
167
168
169
170 }