1 /*
2 * Copyright (c) 2009, 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.swing;
27
28 import sun.misc.Unsafe;
29
30 import java.awt.Point;
31 import javax.swing.RepaintManager;
32 import javax.swing.Popup;
33 import javax.swing.PopupFactory;
34
35 import javax.swing.text.JTextComponent;
36 import javax.swing.TransferHandler;
37
38 /**
39 * The SwingAccessor utility class.
40 * The main purpose of this class is to enable accessing
41 * private and package-private fields of classes from
42 * different classes/packages. See sun.misc.SharedSecretes
43 * for another example.
44 */
45 public final class SwingAccessor {
46 private static final Unsafe unsafe = Unsafe.getUnsafe();
47
48 /**
49 * We don't need any objects of this class.
50 * It's rather a collection of static methods
51 * and interfaces.
52 */
53 private SwingAccessor() {
54 }
55
56 /**
57 * An accessor for the JTextComponent class.
58 * Note that we intentionally introduce the JTextComponentAccessor,
59 * and not the JComponentAccessor because the needed methods
60 * aren't override methods.
61 */
62 public interface JTextComponentAccessor {
63
64 /**
65 * Calculates a custom drop location for the text component,
66 * representing where a drop at the given point should insert data.
67 */
68 TransferHandler.DropLocation dropLocationForPoint(JTextComponent textComp, Point p);
69
70 /**
71 * Called to set or clear the drop location during a DnD operation.
72 */
73 Object setDropLocation(JTextComponent textComp, TransferHandler.DropLocation location,
74 Object state, boolean forDrop);
75 }
76
77 /**
78 * An accessor for the JLightweightFrame class.
79 */
80 public interface JLightweightFrameAccessor {
81 /**
82 * Notifies the JLightweight frame that it needs to update a cursor
83 */
84 void updateCursor(JLightweightFrame frame);
85 }
86
87 /**
88 * An accessor for the RepaintManager class.
89 */
90 public interface RepaintManagerAccessor {
91 void addRepaintListener(RepaintManager rm, SwingUtilities2.RepaintListener l);
92 void removeRepaintListener(RepaintManager rm, SwingUtilities2.RepaintListener l);
93 }
94
95 /**
96 * An accessor for the PopupFctory class.
97 */
98 public interface PopupFactoryAccessor {
99 /**
100 * Enables or disables HeavyWeightPopup cache. If the popup is not
101 * HeavyWeightPopup, the method does nothing.
102 */
103 void setHeavyWeightPopupCacheEnabled(Popup popup, boolean enable);
104 }
105
106 /**
107 * The javax.swing.text.JTextComponent class accessor object.
108 */
109 private static JTextComponentAccessor jtextComponentAccessor;
110
111 /**
112 * Set an accessor object for the javax.swing.text.JTextComponent class.
113 */
114 public static void setJTextComponentAccessor(JTextComponentAccessor jtca) {
115 jtextComponentAccessor = jtca;
116 }
117
118 /**
119 * Retrieve the accessor object for the javax.swing.text.JTextComponent class.
120 */
121 public static JTextComponentAccessor getJTextComponentAccessor() {
122 if (jtextComponentAccessor == null) {
123 unsafe.ensureClassInitialized(JTextComponent.class);
124 }
125
126 return jtextComponentAccessor;
127 }
128
129 /**
130 * The JLightweightFrame class accessor object
131 */
132 private static JLightweightFrameAccessor jLightweightFrameAccessor;
133
134 /**
135 * Set an accessor object for the JLightweightFrame class.
136 */
137 public static void setJLightweightFrameAccessor(JLightweightFrameAccessor accessor) {
138 jLightweightFrameAccessor = accessor;
139 }
140
141 /**
142 * Retrieve the accessor object for the JLightweightFrame class
143 */
144 public static JLightweightFrameAccessor getJLightweightFrameAccessor() {
145 if (jLightweightFrameAccessor == null) {
146 unsafe.ensureClassInitialized(JLightweightFrame.class);
147 }
148 return jLightweightFrameAccessor;
149 }
150
151 /**
152 * The RepaintManager class accessor object.
153 */
154 private static RepaintManagerAccessor repaintManagerAccessor;
155
156 /**
157 * Set an accessor object for the RepaintManager class.
158 */
159 public static void setRepaintManagerAccessor(RepaintManagerAccessor accessor) {
160 repaintManagerAccessor = accessor;
161 }
162
163 /**
164 * Retrieve the accessor object for the RepaintManager class.
165 */
166 public static RepaintManagerAccessor getRepaintManagerAccessor() {
167 if (repaintManagerAccessor == null) {
168 unsafe.ensureClassInitialized(RepaintManager.class);
169 }
170 return repaintManagerAccessor;
171 }
172
173 /**
174 * The PopupFactory class accessor object.
175 */
176 private static PopupFactoryAccessor popupFactoryAccessor;
177
178 /**
179 * Set an accessor object for the PopupFactory class.
180 */
181 public static void setPopupFactoryAccessor(PopupFactoryAccessor accessor) { popupFactoryAccessor = accessor; }
182
183 /**
184 * Retrive the accessor object for the PopupFactory class.
185 */
186 public static PopupFactoryAccessor getPopupFactoryAccessor() {
187 if (popupFactoryAccessor == null) {
188 unsafe.ensureClassInitialized(PopupFactory.class);
189 }
190 return popupFactoryAccessor;
191 }
192 }