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comparison agent/src/share/classes/sun/jvm/hotspot/ui/CommandProcessorPanel.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2005 Sun Microsystems, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.ui;
26
27 import java.io.*;
28 import java.awt.*;
29 import java.awt.event.*;
30 import javax.swing.*;
31 import javax.swing.event.*;
32 import javax.swing.text.*;
33
34 import sun.jvm.hotspot.CommandProcessor;
35 import sun.jvm.hotspot.debugger.*;
36 import sun.jvm.hotspot.utilities.*;
37
38 /** A JPanel subclass containing a scrollable text area displaying the
39 debugger's console, if it has one. This should not be created for
40 a debugger which does not have a console. */
41
42 public class CommandProcessorPanel extends JPanel {
43 private CommandProcessor commands;
44 private JTextArea editor;
45 private boolean updating;
46 private int mark;
47 private String curText; // handles multi-line input via '\'
48
49 // Don't run the "main" method of this class unless this flag is set to true first
50 private static final boolean DEBUGGING = false;
51
52 ByteArrayOutputStream baos = new ByteArrayOutputStream(10240);
53
54
55 public CommandProcessorPanel(CommandProcessor cp) {
56
57 commands = cp;
58
59 setLayout(new BorderLayout());
60
61 editor = new JTextArea();
62 editor.setDocument(new EditableAtEndDocument());
63 editor.setFont(GraphicsUtilities.lookupFont("Courier"));
64 JScrollPane scroller = new JScrollPane();
65 scroller.getViewport().add(editor);
66 add(scroller, BorderLayout.CENTER);
67
68 // Set up out
69 PrintStream o = new PrintStream(baos, true);
70 cp.setOutput(o);
71 cp.setErr(o);
72
73 editor.getDocument().addDocumentListener(new DocumentListener() {
74 public void changedUpdate(DocumentEvent e) {
75 }
76
77 public void insertUpdate(DocumentEvent e) {
78 if (updating) return;
79 beginUpdate();
80 editor.setCaretPosition(editor.getDocument().getLength());
81 if (insertContains(e, '\n')) {
82 String cmd = getMarkedText();
83 // Handle multi-line input
84 if ((cmd.length() == 0) || (cmd.charAt(cmd.length() - 1) != '\\')) {
85 // Trim "\\n" combinations
86 final String ln = trimContinuations(cmd);
87 SwingUtilities.invokeLater(new Runnable() {
88 public void run() {
89 beginUpdate();
90 try {
91 commands.executeCommand(ln);
92 commands.printPrompt();
93 Document d = editor.getDocument();
94 try {
95 d.insertString(d.getLength(), baos.toString(), null);
96 }
97 catch (BadLocationException ble) {
98 ble.printStackTrace();
99 }
100 baos.reset();
101 editor.setCaretPosition(editor.getDocument().getLength());
102 setMark();
103 } finally {
104 endUpdate();
105 }
106 }
107 });
108 }
109 } else {
110 endUpdate();
111 }
112 }
113
114 public void removeUpdate(DocumentEvent e) {
115 }
116 });
117
118 // This is a bit of a hack but is probably better than relying on
119 // the JEditorPane to update the caret's position precisely the
120 // size of the insertion
121 editor.addCaretListener(new CaretListener() {
122 public void caretUpdate(CaretEvent e) {
123 int len = editor.getDocument().getLength();
124 if (e.getDot() > len) {
125 editor.setCaretPosition(len);
126 }
127 }
128 });
129
130 Box hbox = Box.createHorizontalBox();
131 hbox.add(Box.createGlue());
132 JButton button = new JButton("Clear Saved Text");
133 button.addActionListener(new ActionListener() {
134 public void actionPerformed(ActionEvent e) {
135 clear();
136 }
137 });
138 hbox.add(button);
139 hbox.add(Box.createGlue());
140 add(hbox, BorderLayout.SOUTH);
141
142 clear();
143 }
144
145 public void requestFocus() {
146 editor.requestFocus();
147 }
148
149 public void clear() {
150 EditableAtEndDocument d = (EditableAtEndDocument) editor.getDocument();
151 d.clear();
152 commands.executeCommand("");
153 setMark();
154 editor.requestFocus();
155 }
156
157 public void setMark() {
158 ((EditableAtEndDocument) editor.getDocument()).setMark();
159 }
160
161 public String getMarkedText() {
162 try {
163 String s = ((EditableAtEndDocument) editor.getDocument()).getMarkedText();
164 int i = s.length();
165 while ((i > 0) && (s.charAt(i - 1) == '\n')) {
166 i--;
167 }
168 return s.substring(0, i);
169 }
170 catch (BadLocationException e) {
171 e.printStackTrace();
172 return null;
173 }
174 }
175
176 //--------------------------------------------------------------------------------
177 // Internals only below this point
178 //
179
180 private void beginUpdate() {
181 updating = true;
182 }
183
184 private void endUpdate() {
185 updating = false;
186 }
187
188 private boolean insertContains(DocumentEvent e, char c) {
189 String s = null;
190 try {
191 s = editor.getText(e.getOffset(), e.getLength());
192 for (int i = 0; i < e.getLength(); i++) {
193 if (s.charAt(i) == c) {
194 return true;
195 }
196 }
197 }
198 catch (BadLocationException ex) {
199 ex.printStackTrace();
200 }
201 return false;
202 }
203
204 private String trimContinuations(String text) {
205 int i;
206 while ((i = text.indexOf("\\\n")) >= 0) {
207 text = text.substring(0, i) + text.substring(i+2, text.length());
208 }
209 return text;
210 }
211
212 public static void main(String[] args) {
213 JFrame frame = new JFrame();
214 frame.getContentPane().setLayout(new BorderLayout());
215 CommandProcessorPanel panel = new CommandProcessorPanel(null);
216 frame.getContentPane().add(panel, BorderLayout.CENTER);
217 frame.addWindowListener(new WindowAdapter() {
218 public void windowClosing(WindowEvent e) {
219 System.exit(0);
220 }
221 });
222 frame.setSize(500, 500);
223 frame.show();
224 panel.requestFocus();
225 }
226 }