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annotate src/com/five_ten_sg/connectbot/transport/AbsTransport.java @ 69:294435151b0c tn5250

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use 5250 encryption config entry
author Carl Byington <carl@five-ten-sg.com>
date Fri, 13 Jun 2014 19:06:01 -0700
parents a3fd10a8c0de
children 33eb63352be5
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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
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52 // terminal key listener sending to the host
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53 @Override
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54 public void write(byte[] b) {
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55 try {
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56 if (bridge.monitor != null) bridge.monitor.hostData(b);
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57
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58 AbsTransport.this.write(b);
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59 }
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60 catch (IOException e) {
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61 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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62 }
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63 }
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64 @Override
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65 public void write(int b) {
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66 try {
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67 if (bridge.monitor != null) bridge.monitor.hostData(b);
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68
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69 AbsTransport.this.write(b);
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70 }
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71 catch (IOException e) {
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72 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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73 }
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74 }
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75
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76 // We don't use telnet sequences.
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77 @Override
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78 public void sendTelnetCommand(byte cmd) {
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79 }
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80 // We don't want remote to resize our window.
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81 @Override
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82 public void setWindowSize(int c, int r) {
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83 }
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84 // play beep noise
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85 @Override
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86 public void beep() {
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87 if ((bridge.parent != null) && (bridge.parent.isShown()))
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88 manager.playBeep();
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89 else
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90 manager.sendActivityNotification(host);
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91 }
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92
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93 // test for changed screen contents
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94 @Override
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95 public void testChanged() {
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96 if (bridge.monitor != null) bridge.monitor.testChanged();
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97 }
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98 // relay socket writing to the screen
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99 // bridge.monitor placement of new characters
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100 @Override
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101 public void putChar(int c, int l, char ch, int attributes) {
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102 if (bridge.monitor != null) bridge.monitor.screenChanged(l, c);
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103
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104 super.putChar(c, l, ch, attributes);
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105 }
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106 @Override
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107 public void insertChar(int c, int l, char ch, int attributes) {
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108 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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109
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110 super.insertChar(c, l, ch, attributes);
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111 }
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112 @Override
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113 public void insertLine(int l, int n, boolean scrollDown) {
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114 if (bridge.monitor != null) {
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115 if (scrollDown) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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116 else bridge.monitor.screenChanged(0, l, 0, width - 1);
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117 }
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118
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119 super.insertLine(l, n, scrollDown);
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120 }
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121 @Override
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122 public void deleteLine(int l) {
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123 if (bridge.monitor != null) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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124
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125 super.deleteLine(l);
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126 }
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127 @Override
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128 public void deleteChar(int c, int l) {
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129 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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130
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131 super.deleteChar(c, l);
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132 }
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133 @Override
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134 public void setCursorPosition(int c, int l) {
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135 if (bridge.monitor != null) bridge.monitor.cursorMove(l, c);
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136
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137 super.setCursorPosition(c, l);
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138 }
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139
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140 // monitor setField()
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141
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142 };
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143
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144
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145 public AbsTransport() {}
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146
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147 /**
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148 * @return protocol part of the URI
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149 */
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150 public static String getProtocolName() {
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151 return "unknown";
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152 }
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153
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154 /**
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155 * Encode the current transport into a URI that can be passed via intent calls.
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156 * @return URI to host
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157 */
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158 public abstract Uri getUri(String input);
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159
0
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160
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161 /**
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162 * Causes transport to connect to the target host. After connecting but before a
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163 * session is started, must call back to {@link TerminalBridge#onConnected()}.
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164 * After that call a session may be opened.
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165 */
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166 public abstract void connect();
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167
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168 /**
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169 * Checks if read() will block. If there are no bytes remaining in
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170 * the underlying transport, return true.
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171 */
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172 public abstract boolean willBlock();
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173
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174 /**
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175 * Reads from the transport. Transport must support reading into a byte array
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176 * <code>buffer</code> at the start of <code>offset</code> and a maximum of
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177 * <code>length</code> bytes. If the remote host disconnects, throw an
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178 * {@link IOException}.
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179 * @param buffer byte buffer to store read bytes into
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180 * @param offset where to start writing in the buffer
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181 * @param length maximum number of bytes to read
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182 * @return number of bytes read
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183 * @throws IOException when remote host disconnects
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184 */
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185 public abstract int read(byte[] buffer, int offset, int length) throws IOException;
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186
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187 /**
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188 * Writes to the transport. If the host is not yet connected, simply return without
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189 * doing anything. An {@link IOException} should be thrown if there is an error after
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190 * connection.
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191 * @param buffer bytes to write to transport
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192 * @throws IOException when there is a problem writing after connection
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193 */
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194 public abstract void write(byte[] buffer) throws IOException;
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195
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196 /**
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197 * Writes to the transport. See {@link #write(byte[])} for behavior details.
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198 * @param c character to write to the transport
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199 * @throws IOException when there is a problem writing after connection
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200 */
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201 public abstract void write(int c) throws IOException;
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202
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203 /**
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204 * Flushes the write commands to the transport.
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205 * @throws IOException when there is a problem writing after connection
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206 */
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207 public abstract void flush() throws IOException;
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208
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209 /**
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210 * Closes the connection to the terminal. Note that the resulting failure to read
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211 * should call {@link TerminalBridge#dispatchDisconnect(boolean)}.
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212 */
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213 public abstract void close();
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214
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215 /**
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216 * Tells the transport what dimensions the display is currently
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217 * @param columns columns of text
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218 * @param rows rows of text
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219 * @param width width in pixels
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220 * @param height height in pixels
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221 */
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222 public abstract void setDimensions(int columns, int rows, int width, int height);
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223
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224 public void setOptions(Map<String, String> options) {
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225 // do nothing
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226 }
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227
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228 public Map<String, String> getOptions() {
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229 return null;
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230 }
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231
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232 public void setCompression(boolean compression) {
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233 // do nothing
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234 }
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235
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236 public void setHttpproxy(String httpproxy) {
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237 // do nothing
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238 }
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239
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240 public void setUseAuthAgent(String useAuthAgent) {
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241 // do nothing
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242 }
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243
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244 public String getEmulation() {
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245 return emulation;
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246 }
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247
47
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248 protected vt320 setupTransportBuffer() {
42
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249 int scrollback = (host.getWantSession()) ? manager.getScrollback() : 0;
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250 buffer.setBufferSize(scrollback);
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251 buffer.setDisplay(bridge);
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252 return buffer;
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253 }
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254
47
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255 public vt320 getTransportBuffer() {
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256 buffer = new vt320Default();
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257 return setupTransportBuffer();
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258 }
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259
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260 public void setLinks(TerminalManager manager, TerminalBridge bridge, HostBean host, String emulation) {
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261 this.manager = manager;
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262 this.bridge = bridge;
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263 this.host = host;
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264 this.emulation = emulation;
0
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265 }
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266
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267 /**
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268 * Whether or not this transport type can forward ports.
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269 * @return true on ability to forward ports
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270 */
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271 public boolean canForwardPorts() {
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272 return false;
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273 }
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274
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275 /**
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276 * Adds the {@link PortForwardBean} to the list.
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277 * @param portForward the port forward bean to add
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278 * @return true on successful addition
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279 */
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280 public boolean addPortForward(PortForwardBean portForward) {
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281 return false;
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282 }
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283
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284 /**
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285 * Enables a port forward member. After calling this method, the port forward should
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286 * be operational iff it could be enabled by the transport.
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287 * @param portForward member of our current port forwards list to enable
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288 * @return true on successful port forward setup
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289 */
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290 public boolean enablePortForward(PortForwardBean portForward) {
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291 return false;
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292 }
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293
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294 /**
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295 * Disables a port forward member. After calling this method, the port forward should
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296 * be non-functioning iff it could be disabled by the transport.
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297 * @param portForward member of our current port forwards list to enable
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298 * @return true on successful port forward tear-down
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299 */
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300 public boolean disablePortForward(PortForwardBean portForward) {
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301 return false;
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302 }
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303
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304 /**
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305 * Removes the {@link PortForwardBean} from the available port forwards.
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306 * @param portForward the port forward bean to remove
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307 * @return true on successful removal
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308 */
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309 public boolean removePortForward(PortForwardBean portForward) {
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310 return false;
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311 }
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312
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313 /**
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314 * Gets a list of the {@link PortForwardBean} currently used by this transport.
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315 * @return the list of port forwards
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316 */
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317 public List<PortForwardBean> getPortForwards() {
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318 return null;
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319 }
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320
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321 /**
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322 * Whether or not this transport type can transfer files.
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323 * @return true on ability to transfer files
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324 */
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325 public boolean canTransferFiles() {
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326 return false;
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327 }
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328
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329 /**
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330 * Downloads the specified remote file to a local folder.
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331 * @param remoteFile The path to the remote file to be downloaded. Must be non-null.
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332 * @param localFolder The path to local folder. Null = default external storage folder.
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333 * @return true on success, false on failure
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334 */
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335 public boolean downloadFile(String remoteFile, String localFolder) {
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336 return false;
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337 }
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338
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339 /**
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340 * Uploads the specified local file to the remote host.
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341 * @param localFile The path to the local file to be uploaded. Must be non-null.
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342 * @param remoteFolder The path to the remote directory. Null == default remote directory.
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343 * @return true on success, false on failure
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344 */
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345 public boolean uploadFile(String localFile, String remoteFile,
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346 String remoteFolder, String mode) {
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347 return false;
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348 }
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349
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350
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351 /**
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352 * @return int default port for protocol
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353 */
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354 public abstract int getDefaultPort();
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355 public abstract boolean isConnected();
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356 public abstract boolean isSessionOpen();
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357 public abstract boolean isAuthenticated();
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358
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359 /**
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360 * @param username
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361 * @param hostname
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362 * @param port
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363 * @return
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364 */
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365 public abstract String getDefaultNickname(String username, String hostname, int port);
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366
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367 /**
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368 * @param uri
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369 * @param selectionKeys
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370 * @param selectionValues
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371 */
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372 public abstract void getSelectionArgs(Uri uri, Map<String, String> selection);
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373
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374 /**
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375 * @param uri
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376 * @return
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377 */
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378 public abstract HostBean createHost(Uri uri);
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379
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380 /**
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381 * @param context context containing the correct resources
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382 * @return string that hints at the format for connection
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383 */
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384 public abstract String getFormatHint(Context context);
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385
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386 /**
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387 * @return do we use the network
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388 */
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389 public abstract boolean usesNetwork();
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390
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391 /**
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392 * @return do we need a relay object to read from the transport
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393 * and send the data into the vt320 buffer
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394 */
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395 public boolean needsRelay() {
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396 return true;
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397 }
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398
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399 /**
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400 * @return a key listener
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401 */
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402 public TerminalKeyListener getTerminalKeyListener() {
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403 return new TerminalKeyListener(manager, bridge, buffer, host.getEncoding());
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404 }
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405
0
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406 }