001 /*
002 * Copyright (C) 2010 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020 package org.crsh.telnet.term;
021
022 import net.wimpi.telnetd.io.BasicTerminalIO;
023 import net.wimpi.telnetd.io.TerminalIO;
024 import net.wimpi.telnetd.net.Connection;
025 import net.wimpi.telnetd.net.ConnectionData;
026 import org.crsh.text.Color;
027 import org.crsh.text.Decoration;
028 import org.crsh.text.Style;
029 import org.crsh.term.*;
030 import org.crsh.term.spi.TermIO;
031
032 import java.io.EOFException;
033 import java.io.IOException;
034 import java.net.SocketException;
035 import java.util.HashMap;
036
037 /**
038 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
039 * @version $Revision$
040 */
041 public class TelnetIO implements TermIO {
042
043 /** . */
044 private final Connection conn;
045
046 /** . */
047 private final BasicTerminalIO termIO;
048
049 public TelnetIO(Connection conn) {
050 this.conn = conn;
051 this.termIO = conn.getTerminalIO();
052 }
053
054 public int read() throws IOException {
055 try {
056 return termIO.read();
057 }
058 catch (EOFException e) {
059 return TerminalIO.HANDLED;
060 }
061 catch (SocketException e) {
062 return TerminalIO.HANDLED;
063 }
064 }
065
066 public int getWidth() {
067 return termIO.getColumns();
068 }
069
070 public String getProperty(String name) {
071 ConnectionData data = conn.getConnectionData();
072 if (data != null)
073 {
074 HashMap map = data.getEnvironment();
075 if (map != null) {
076 Object value = map.get(name);
077 if (value != null) {
078 return value.toString();
079 }
080 }
081 }
082 return null;
083 }
084
085 public CodeType decode(int code) {
086 switch (code) {
087 case 3:
088 return CodeType.BREAK;
089 case TerminalIO.TABULATOR:
090 return CodeType.TAB;
091 case TerminalIO.DELETE:
092 case TerminalIO.BACKSPACE:
093 return CodeType.BACKSPACE;
094 case TerminalIO.UP:
095 return CodeType.UP;
096 case TerminalIO.DOWN:
097 return CodeType.DOWN;
098 case TerminalIO.RIGHT:
099 return CodeType.RIGHT;
100 case TerminalIO.LEFT:
101 return CodeType.LEFT;
102 case TerminalIO.HANDLED:
103 return CodeType.CLOSE;
104 default:
105 return CodeType.CHAR;
106 }
107 }
108
109 public void close() {
110 conn.close();
111 }
112
113 public void flush() throws IOException {
114 termIO.flush();
115 }
116
117 public void write(String s) throws IOException {
118 termIO.write(s);
119 }
120
121 public void write(Style style) throws IOException {
122 if (style == Style.reset) {
123 termIO.resetAttributes();
124 termIO.write("");
125 } else {
126 //
127 Decoration decoration = style.getDecoration();
128 termIO.setBlink(Decoration.blink == decoration);
129 termIO.setBold(Decoration.bold == decoration);
130 termIO.setUnderlined(Decoration.underline == decoration);
131
132 //
133 Color fg = style.getForeground();
134 if (fg != null) {
135 termIO.setForegroundColor(fg.code(30));
136 } else {
137 termIO.setForegroundColor(BasicTerminalIO.COLORINIT);
138 }
139
140 //
141 Color bg = style.getBackground();
142 if (bg != null) {
143 termIO.setBackgroundColor(bg.code(30));
144 }
145 else {
146 termIO.setBackgroundColor(BasicTerminalIO.COLORINIT);
147 }
148 }
149 }
150
151 public void write(char c) throws IOException {
152 termIO.write(c);
153 }
154
155 public void writeDel() throws IOException {
156 termIO.moveLeft(1);
157 termIO.write(' ');
158 termIO.moveLeft(1);
159 termIO.flush();
160 }
161
162 public void writeCRLF() throws IOException {
163 termIO.write("\r\n");
164 }
165
166 public boolean moveRight(char c) throws IOException {
167 termIO.moveRight(1);
168 return true;
169 }
170
171 public boolean moveLeft() throws IOException {
172 termIO.moveLeft(1);
173 return true;
174 }
175 }