1 /*
2 * Copyright (c) 2011, 2012, 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 package sun.lwawt;
28
29 import java.awt.Dimension;
30 import java.awt.FontMetrics;
31 import java.awt.Insets;
32 import java.awt.SystemColor;
33 import java.awt.TextComponent;
34 import java.awt.event.TextEvent;
35 import java.awt.event.InputMethodListener;
36 import java.awt.event.InputMethodEvent;
37 import java.awt.im.InputMethodRequests;
38 import java.awt.peer.TextComponentPeer;
39 import sun.awt.AWTAccessor;
40
41 import javax.swing.JComponent;
42 import javax.swing.event.DocumentEvent;
43 import javax.swing.event.DocumentListener;
44 import javax.swing.text.Document;
45 import javax.swing.text.JTextComponent;
46
47 abstract class LWTextComponentPeer<T extends TextComponent, D extends JComponent>
48 extends LWComponentPeer<T, D>
49 implements DocumentListener, TextComponentPeer, InputMethodListener {
50
51
52 private volatile boolean firstChangeSkipped;
53
54 LWTextComponentPeer(final T target,
55 final PlatformComponent platformComponent) {
56 super(target, platformComponent);
57 if (!getTarget().isBackgroundSet()) {
58 getTarget().setBackground(SystemColor.text);
59 }
60 }
61
62 @Override
63 void initializeImpl() {
64 super.initializeImpl();
65 synchronized (getDelegateLock()) {
66 // This listener should be added before setText().
67 getTextComponent().getDocument().addDocumentListener(this);
68 }
69 setEditable(getTarget().isEditable());
70 setText(getTarget().getText());
71 getTarget().addInputMethodListener(this);
72 final int start = getTarget().getSelectionStart();
73 final int end = getTarget().getSelectionEnd();
74 if (end > start) {
75 select(start, end);
76 }
77 setCaretPosition(getTarget().getCaretPosition());
78 firstChangeSkipped = true;
79 }
80
81 @Override
82 protected final void disposeImpl() {
83 synchronized (getDelegateLock()) {
84 // visible caret has a timer thread which must be stopped
85 getTextComponent().getCaret().setVisible(false);
86 }
87 super.disposeImpl();
88 }
89
90 /**
91 * This method should be called under getDelegateLock().
92 */
93 abstract JTextComponent getTextComponent();
94
95 public Dimension getMinimumSize(final int rows, final int columns) {
96 final Insets insets;
97 synchronized (getDelegateLock()) {
98 insets = getTextComponent().getInsets();
99 }
100 final int borderHeight = insets.top + insets.bottom;
101 final int borderWidth = insets.left + insets.right;
102 final FontMetrics fm = getFontMetrics(getFont());
103 return new Dimension(fm.charWidth(WIDE_CHAR) * columns + borderWidth,
104 fm.getHeight() * rows + borderHeight);
105 }
106
107 @Override
108 public final void setEditable(final boolean editable) {
109 synchronized (getDelegateLock()) {
110 getTextComponent().setEditable(editable);
111 }
112 }
113
114 @Override
115 public final String getText() {
116 synchronized (getDelegateLock()) {
117 return getTextComponent().getText();
118 }
119 }
120
121 @Override
122 public final void setText(final String l) {
123 synchronized (getDelegateLock()) {
124 // JTextArea.setText() posts two different events (remove & insert).
125 // Since we make no differences between text events,
126 // the document listener has to be disabled while
127 // JTextArea.setText() is called.
128 final Document document = getTextComponent().getDocument();
129 document.removeDocumentListener(this);
130 getTextComponent().setText(l);
131 revalidate();
132 if (firstChangeSkipped) {
133 postEvent(new TextEvent(getTarget(),
134 TextEvent.TEXT_VALUE_CHANGED));
135 }
136 document.addDocumentListener(this);
137 }
138 repaintPeer();
139 }
140
141 @Override
142 public final int getSelectionStart() {
143 synchronized (getDelegateLock()) {
144 return getTextComponent().getSelectionStart();
145 }
146 }
147
148 @Override
149 public final int getSelectionEnd() {
150 synchronized (getDelegateLock()) {
151 return getTextComponent().getSelectionEnd();
152 }
153 }
154
155 @Override
156 public final void select(final int selStart, final int selEnd) {
157 synchronized (getDelegateLock()) {
158 getTextComponent().select(selStart, selEnd);
159 }
160 repaintPeer();
161 }
162
163 @Override
164 public final void setCaretPosition(final int pos) {
165 synchronized (getDelegateLock()) {
166 getTextComponent().setCaretPosition(pos);
167 }
168 repaintPeer();
169 }
170
171 @Override
172 public final int getCaretPosition() {
173 synchronized (getDelegateLock()) {
174 return getTextComponent().getCaretPosition();
175 }
176 }
177
178 @Override
179 public final InputMethodRequests getInputMethodRequests() {
180 synchronized (getDelegateLock()) {
181 return getTextComponent().getInputMethodRequests();
182 }
183 }
184
185 //TODO IN XAWT we just return true..
186 @Override
187 public final boolean isFocusable() {
188 return getTarget().isFocusable();
189 }
190
191 protected final void revalidate() {
192 synchronized (getDelegateLock()) {
193 getTextComponent().invalidate();
194 getDelegate().validate();
195 }
196 }
197
198 protected final void postTextEvent() {
199 postEvent(new TextEvent(getTarget(), TextEvent.TEXT_VALUE_CHANGED));
200 synchronized (getDelegateLock()) {
201 revalidate();
202 }
203 }
204
205 @Override
206 public final void changedUpdate(final DocumentEvent e) {
207 postTextEvent();
208 }
209
210 @Override
211 public final void insertUpdate(final DocumentEvent e) {
212 postTextEvent();
213 }
214
215 @Override
216 public final void removeUpdate(final DocumentEvent e) {
217 postTextEvent();
218 }
219
220 @Override
221 public void inputMethodTextChanged(InputMethodEvent event) {
222 synchronized (getDelegateLock()) {
223 AWTAccessor.getComponentAccessor().processEvent(getTextComponent(), event);
224 }
225 }
226
227 @Override
228 public void caretPositionChanged(InputMethodEvent event) {
229 synchronized (getDelegateLock()) {
230 AWTAccessor.getComponentAccessor().processEvent(getTextComponent(), event);
231 }
232 }
233 }