1 /*
2 * Copyright (c) 2011, 2016, 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.lwawt.macosx;
27
28 import java.awt.Component;
29 import java.beans.PropertyChangeEvent;
30 import java.beans.PropertyChangeListener;
31
32 import javax.accessibility.Accessible;
33 import javax.accessibility.AccessibleContext;
34 import javax.swing.JProgressBar;
35 import javax.swing.JSlider;
36 import javax.swing.event.ChangeEvent;
37 import javax.swing.event.ChangeListener;
38
39 import static javax.accessibility.AccessibleContext.ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY;
40 import static javax.accessibility.AccessibleContext.ACCESSIBLE_CARET_PROPERTY;
41 import static javax.accessibility.AccessibleContext.ACCESSIBLE_SELECTION_PROPERTY;
42 import static javax.accessibility.AccessibleContext.ACCESSIBLE_TEXT_PROPERTY;
43 import sun.awt.AWTAccessor;
44
45
46 class CAccessible extends CFRetainedResource implements Accessible {
47
48 public static CAccessible getCAccessible(final Accessible a) {
49 if (a == null) return null;
50 AccessibleContext context = a.getAccessibleContext();
51 AWTAccessor.AccessibleContextAccessor accessor
52 = AWTAccessor.getAccessibleContextAccessor();
53 final CAccessible cachedCAX = (CAccessible) accessor.getNativeAXResource(context);
54 if (cachedCAX != null) {
55 return cachedCAX;
56 }
57 final CAccessible newCAX = new CAccessible(a);
58 accessor.setNativeAXResource(context, newCAX);
59 return newCAX;
60 }
61
62 private static native void unregisterFromCocoaAXSystem(long ptr);
63 private static native void valueChanged(long ptr);
64 private static native void selectedTextChanged(long ptr);
65 private static native void selectionChanged(long ptr);
66
67 private Accessible accessible;
68
69 private AccessibleContext activeDescendant;
70
71 private CAccessible(final Accessible accessible) {
72 super(0L, true); // real pointer will be poked in by native
73
74 if (accessible == null) throw new NullPointerException();
75 this.accessible = accessible;
76
77 if (accessible instanceof Component) {
78 addNotificationListeners((Component)accessible);
79 }
80 }
81
82 @Override
83 protected synchronized void dispose() {
84 if (ptr != 0) unregisterFromCocoaAXSystem(ptr);
85 super.dispose();
86 }
87
88 @Override
89 public AccessibleContext getAccessibleContext() {
90 return accessible.getAccessibleContext();
91 }
92
93 public void addNotificationListeners(Component c) {
94 if (c instanceof Accessible) {
95 AccessibleContext ac = ((Accessible)c).getAccessibleContext();
96 ac.addPropertyChangeListener(new AXChangeNotifier());
97 }
98 if (c instanceof JProgressBar) {
99 JProgressBar pb = (JProgressBar) c;
100 pb.addChangeListener(new AXProgressChangeNotifier());
101 } else if (c instanceof JSlider) {
102 JSlider slider = (JSlider) c;
103 slider.addChangeListener(new AXProgressChangeNotifier());
104 }
105 }
106
107
108 private class AXChangeNotifier implements PropertyChangeListener {
109
110 @Override
111 public void propertyChange(PropertyChangeEvent e) {
112 String name = e.getPropertyName();
113 if ( ptr != 0 ) {
114 if (name.compareTo(ACCESSIBLE_CARET_PROPERTY) == 0) {
115 selectedTextChanged(ptr);
116 } else if (name.compareTo(ACCESSIBLE_TEXT_PROPERTY) == 0 ) {
117 valueChanged(ptr);
118 } else if (name.compareTo(ACCESSIBLE_SELECTION_PROPERTY) == 0 ) {
119 selectionChanged(ptr);
120 } else if (name.compareTo(ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY) == 0 ) {
121 Object nv = e.getNewValue();
122 if (nv instanceof AccessibleContext) {
123 activeDescendant = (AccessibleContext)nv;
124 }
125 }
126 }
127 }
128 }
129
130 private class AXProgressChangeNotifier implements ChangeListener {
131 @Override
132 public void stateChanged(ChangeEvent e) {
133 if (ptr != 0) valueChanged(ptr);
134 }
135 }
136
137 static Accessible getSwingAccessible(final Accessible a) {
138 return (a instanceof CAccessible) ? ((CAccessible)a).accessible : a;
139 }
140
141 static AccessibleContext getActiveDescendant(final Accessible a) {
142 return (a instanceof CAccessible) ? ((CAccessible)a).activeDescendant : null;
143 }
144
145 }