Mercurial > 510Connectbot

annotate src/com/five_ten_sg/connectbot/transport/AbsTransport.java @ 48:1e931ef5f776 tn5250

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start tn5250 integration
author Carl Byington <carl@five-ten-sg.com>
date Wed, 11 Jun 2014 10:11:29 -0700
parents a3fd10a8c0de
children 294435151b0c
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1 /*
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2 * ConnectBot: simple, powerful, open-source SSH client for Android
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3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
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4 *
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5 * Licensed under the Apache License, Version 2.0 (the "License");
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6 * you may not use this file except in compliance with the License.
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7 * You may obtain a copy of the License at
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8 *
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9 * http://www.apache.org/licenses/LICENSE-2.0
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10 *
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11 * Unless required by applicable law or agreed to in writing, software
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12 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 * See the License for the specific language governing permissions and
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15 * limitations under the License.
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16 */
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17
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18 package com.five_ten_sg.connectbot.transport;
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19
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20 import java.io.IOException;
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21 import java.util.List;
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22 import java.util.Map;
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23
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24 import com.five_ten_sg.connectbot.bean.HostBean;
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25 import com.five_ten_sg.connectbot.bean.PortForwardBean;
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26 import com.five_ten_sg.connectbot.service.TerminalBridge;
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27 import com.five_ten_sg.connectbot.service.TerminalKeyListener;
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28 import com.five_ten_sg.connectbot.service.TerminalManager;
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29 import android.content.Context;
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30 import android.net.Uri;
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31 import android.util.Log;
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32 import de.mud.terminal.vt320;
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33
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34 /**
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35 * @author Kenny Root
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36 *
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37 */
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38 public abstract class AbsTransport {
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39 protected String TAG;
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40 protected TerminalManager manager;
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41 protected TerminalBridge bridge;
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42 protected HostBean host;
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43 protected vt320 buffer = null;
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44 protected String emulation;
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45
42
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46 class vt320Default extends vt320 {
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47 @Override
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48 public void debug(String s) {
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49 Log.d(TAG, s);
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50 }
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51 @Override
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52 public void write(byte[] b) {
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53 try {
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54 if (bridge.monitor != null) bridge.monitor.hostData(b);
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55
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56 AbsTransport.this.write(b);
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57 }
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58 catch (IOException e) {
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59 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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60 }
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61 }
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62 @Override
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63 public void write(int b) {
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64 try {
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65 if (bridge.monitor != null) bridge.monitor.hostData(b);
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66
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67 AbsTransport.this.write(b);
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68 }
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69 catch (IOException e) {
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70 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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71 }
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72 }
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73 // We don't use telnet sequences.
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74 @Override
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75 public void sendTelnetCommand(byte cmd) {
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76 }
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77 // We don't want remote to resize our window.
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78 @Override
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79 public void setWindowSize(int c, int r) {
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80 }
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81 // test for changed screen contents
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82 @Override
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83 public void testChanged() {
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84 if (bridge.monitor != null) bridge.monitor.testChanged();
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85 }
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86 // play beep noise
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87 @Override
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88 public void beep() {
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89 if ((bridge.parent != null) && (bridge.parent.isShown()))
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90 manager.playBeep();
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91 else
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92 manager.sendActivityNotification(host);
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93 }
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94 // bridge.monitor placement of new characters
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95 @Override
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96 public void putChar(int c, int l, char ch, int attributes) {
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97 if (bridge.monitor != null) bridge.monitor.screenChanged(l, c);
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98
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99 super.putChar(c, l, ch, attributes);
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100 }
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101 @Override
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102 public void insertChar(int c, int l, char ch, int attributes) {
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103 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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104
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105 super.insertChar(c, l, ch, attributes);
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106 }
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107 @Override
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108 public void insertLine(int l, int n, boolean scrollDown) {
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109 if (bridge.monitor != null) {
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110 if (scrollDown) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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111 else bridge.monitor.screenChanged(0, l, 0, width - 1);
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112 }
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113
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114 super.insertLine(l, n, scrollDown);
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115 }
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116 @Override
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117 public void deleteLine(int l) {
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118 if (bridge.monitor != null) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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119
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120 super.deleteLine(l);
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121 }
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122 @Override
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123 public void deleteChar(int c, int l) {
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124 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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125
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126 super.deleteChar(c, l);
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127 }
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128 @Override
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129 public void setCursorPosition(int c, int l) {
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130 if (bridge.monitor != null) bridge.monitor.cursorMove(l, c);
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131
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132 super.setCursorPosition(c, l);
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133 }
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134 };
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135
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136
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137 public AbsTransport() {}
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138
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139 /**
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140 * @return protocol part of the URI
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141 */
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142 public static String getProtocolName() {
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143 return "unknown";
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144 }
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145
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146 /**
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147 * Encode the current transport into a URI that can be passed via intent calls.
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148 * @return URI to host
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149 */
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150 public abstract Uri getUri(String input);
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151
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152
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153 /**
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154 * Causes transport to connect to the target host. After connecting but before a
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155 * session is started, must call back to {@link TerminalBridge#onConnected()}.
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156 * After that call a session may be opened.
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157 */
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158 public abstract void connect();
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159
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160 /**
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161 * Checks if read() will block. If there are no bytes remaining in
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162 * the underlying transport, return true.
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163 */
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164 public abstract boolean willBlock();
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165
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166 /**
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167 * Reads from the transport. Transport must support reading into a byte array
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168 * <code>buffer</code> at the start of <code>offset</code> and a maximum of
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169 * <code>length</code> bytes. If the remote host disconnects, throw an
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170 * {@link IOException}.
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171 * @param buffer byte buffer to store read bytes into
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172 * @param offset where to start writing in the buffer
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173 * @param length maximum number of bytes to read
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174 * @return number of bytes read
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175 * @throws IOException when remote host disconnects
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176 */
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177 public abstract int read(byte[] buffer, int offset, int length) throws IOException;
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178
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179 /**
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180 * Writes to the transport. If the host is not yet connected, simply return without
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181 * doing anything. An {@link IOException} should be thrown if there is an error after
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182 * connection.
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183 * @param buffer bytes to write to transport
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184 * @throws IOException when there is a problem writing after connection
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185 */
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186 public abstract void write(byte[] buffer) throws IOException;
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187
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188 /**
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189 * Writes to the transport. See {@link #write(byte[])} for behavior details.
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190 * @param c character to write to the transport
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191 * @throws IOException when there is a problem writing after connection
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192 */
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193 public abstract void write(int c) throws IOException;
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194
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195 /**
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196 * Flushes the write commands to the transport.
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197 * @throws IOException when there is a problem writing after connection
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198 */
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199 public abstract void flush() throws IOException;
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200
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201 /**
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202 * Closes the connection to the terminal. Note that the resulting failure to read
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203 * should call {@link TerminalBridge#dispatchDisconnect(boolean)}.
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204 */
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205 public abstract void close();
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206
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207 /**
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208 * Tells the transport what dimensions the display is currently
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209 * @param columns columns of text
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210 * @param rows rows of text
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211 * @param width width in pixels
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212 * @param height height in pixels
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213 */
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214 public abstract void setDimensions(int columns, int rows, int width, int height);
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215
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216 public void setOptions(Map<String, String> options) {
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217 // do nothing
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218 }
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219
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220 public Map<String, String> getOptions() {
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221 return null;
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222 }
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223
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224 public void setCompression(boolean compression) {
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225 // do nothing
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226 }
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227
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228 public void setHttpproxy(String httpproxy) {
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229 // do nothing
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230 }
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231
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232 public void setUseAuthAgent(String useAuthAgent) {
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233 // do nothing
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234 }
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235
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236 public String getEmulation() {
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237 return emulation;
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238 }
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239
47
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240 protected vt320 setupTransportBuffer() {
42
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241 int scrollback = (host.getWantSession()) ? manager.getScrollback() : 0;
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242 buffer.setBufferSize(scrollback);
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243 buffer.setDisplay(bridge);
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244 return buffer;
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245 }
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246
47
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247 public vt320 getTransportBuffer() {
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248 buffer = new vt320Default();
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249 return setupTransportBuffer();
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250 }
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251
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252 public void setLinks(TerminalManager manager, TerminalBridge bridge, HostBean host, String emulation) {
31
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253 this.manager = manager;
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254 this.bridge = bridge;
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255 this.host = host;
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256 this.emulation = emulation;
0
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257 }
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258
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259 /**
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260 * Whether or not this transport type can forward ports.
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261 * @return true on ability to forward ports
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262 */
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263 public boolean canForwardPorts() {
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264 return false;
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265 }
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266
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267 /**
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268 * Adds the {@link PortForwardBean} to the list.
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269 * @param portForward the port forward bean to add
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270 * @return true on successful addition
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271 */
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272 public boolean addPortForward(PortForwardBean portForward) {
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273 return false;
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274 }
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275
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276 /**
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277 * Enables a port forward member. After calling this method, the port forward should
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278 * be operational iff it could be enabled by the transport.
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279 * @param portForward member of our current port forwards list to enable
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280 * @return true on successful port forward setup
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281 */
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282 public boolean enablePortForward(PortForwardBean portForward) {
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283 return false;
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284 }
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285
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286 /**
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287 * Disables a port forward member. After calling this method, the port forward should
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288 * be non-functioning iff it could be disabled by the transport.
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289 * @param portForward member of our current port forwards list to enable
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290 * @return true on successful port forward tear-down
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291 */
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292 public boolean disablePortForward(PortForwardBean portForward) {
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293 return false;
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294 }
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295
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296 /**
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297 * Removes the {@link PortForwardBean} from the available port forwards.
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298 * @param portForward the port forward bean to remove
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299 * @return true on successful removal
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300 */
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301 public boolean removePortForward(PortForwardBean portForward) {
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302 return false;
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303 }
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304
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305 /**
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306 * Gets a list of the {@link PortForwardBean} currently used by this transport.
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307 * @return the list of port forwards
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308 */
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309 public List<PortForwardBean> getPortForwards() {
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310 return null;
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311 }
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312
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313 /**
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314 * Whether or not this transport type can transfer files.
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315 * @return true on ability to transfer files
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316 */
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317 public boolean canTransferFiles() {
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318 return false;
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319 }
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320
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321 /**
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322 * Downloads the specified remote file to a local folder.
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323 * @param remoteFile The path to the remote file to be downloaded. Must be non-null.
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324 * @param localFolder The path to local folder. Null = default external storage folder.
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325 * @return true on success, false on failure
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326 */
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327 public boolean downloadFile(String remoteFile, String localFolder) {
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328 return false;
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329 }
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330
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331 /**
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332 * Uploads the specified local file to the remote host.
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333 * @param localFile The path to the local file to be uploaded. Must be non-null.
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334 * @param remoteFolder The path to the remote directory. Null == default remote directory.
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335 * @return true on success, false on failure
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336 */
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337 public boolean uploadFile(String localFile, String remoteFile,
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338 String remoteFolder, String mode) {
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339 return false;
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340 }
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341
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342
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343 /**
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344 * @return int default port for protocol
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345 */
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346 public abstract int getDefaultPort();
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347 public abstract boolean isConnected();
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348 public abstract boolean isSessionOpen();
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349 public abstract boolean isAuthenticated();
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350
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351 /**
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352 * @param username
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353 * @param hostname
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354 * @param port
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355 * @return
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356 */
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357 public abstract String getDefaultNickname(String username, String hostname, int port);
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358
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359 /**
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360 * @param uri
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361 * @param selectionKeys
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362 * @param selectionValues
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363 */
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364 public abstract void getSelectionArgs(Uri uri, Map<String, String> selection);
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365
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366 /**
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367 * @param uri
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368 * @return
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369 */
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370 public abstract HostBean createHost(Uri uri);
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371
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372 /**
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373 * @param context context containing the correct resources
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374 * @return string that hints at the format for connection
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375 */
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376 public abstract String getFormatHint(Context context);
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377
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378 /**
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379 * @return do we use the network
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380 */
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381 public abstract boolean usesNetwork();
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382
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383 /**
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384 * @return do we need a relay object to read from the transport
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385 * and send the data into the vt320 buffer
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386 */
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387 public boolean needsRelay() {
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388 return true;
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389 }
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390
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391 /**
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392 * @return a key listener
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393 */
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394 public TerminalKeyListener getTerminalKeyListener() {
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395 return new TerminalKeyListener(manager, bridge, buffer, host.getEncoding());
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396 }
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397
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398 }