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 }