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.term.CodeType;
027 import org.crsh.term.spi.TermIO;
028
029 import java.io.EOFException;
030 import java.io.IOException;
031 import java.net.SocketException;
032 import java.util.HashMap;
033
034 /**
035 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
036 * @version $Revision$
037 */
038 public class TelnetIO implements TermIO {
039
040 /** . */
041 private final Connection conn;
042
043 /** . */
044 private final BasicTerminalIO termIO;
045
046 public TelnetIO(Connection conn) {
047 this.conn = conn;
048 this.termIO = conn.getTerminalIO();
049 }
050
051 public int read() throws IOException {
052 try {
053 return termIO.read();
054 }
055 catch (EOFException e) {
056 return TerminalIO.HANDLED;
057 }
058 catch (SocketException e) {
059 return TerminalIO.HANDLED;
060 }
061 }
062
063 public int getWidth() {
064 return termIO.getColumns();
065 }
066
067 public String getProperty(String name) {
068 ConnectionData data = conn.getConnectionData();
069 if (data != null)
070 {
071 HashMap map = data.getEnvironment();
072 if (map != null) {
073 Object value = map.get(name);
074 if (value != null) {
075 return value.toString();
076 }
077 }
078 }
079 return null;
080 }
081
082 public CodeType decode(int code) {
083 switch (code) {
084 case 3:
085 return CodeType.BREAK;
086 case TerminalIO.TABULATOR:
087 return CodeType.TAB;
088 case TerminalIO.DELETE:
089 case TerminalIO.BACKSPACE:
090 return CodeType.BACKSPACE;
091 case TerminalIO.UP:
092 return CodeType.UP;
093 case TerminalIO.DOWN:
094 return CodeType.DOWN;
095 case TerminalIO.RIGHT:
096 return CodeType.RIGHT;
097 case TerminalIO.LEFT:
098 return CodeType.LEFT;
099 case TerminalIO.HANDLED:
100 return CodeType.CLOSE;
101 default:
102 return CodeType.CHAR;
103 }
104 }
105
106 public void close() {
107 conn.close();
108 }
109
110 public void flush() throws IOException {
111 termIO.flush();
112 }
113
114 public void write(String s) throws IOException {
115 termIO.write(s);
116 }
117
118 public void write(char c) throws IOException {
119 termIO.write(c);
120 }
121
122 public void writeDel() throws IOException {
123 termIO.moveLeft(1);
124 termIO.write(' ');
125 termIO.moveLeft(1);
126 termIO.flush();
127 }
128
129 public void writeCRLF() throws IOException {
130 termIO.write("\r\n");
131 }
132
133 public boolean moveRight(char c) throws IOException {
134 termIO.moveRight(1);
135 return true;
136 }
137
138 public boolean moveLeft() throws IOException {
139 termIO.moveLeft(1);
140 return true;
141 }
142 }