Mercurial > 510Connectbot

annotate src/com/five_ten_sg/connectbot/transport/AbsTransport.java @ 423:76efe8fa29b9

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more debugging looking for duplicate transmission
author Carl Byington <carl@five-ten-sg.com>
date Fri, 31 Oct 2014 08:58:00 -0700
parents 2a7199ad90be
children
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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 String homeDirectory;
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43 protected HostBean host;
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44 protected vt320 buffer = null;
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45 protected String emulation;
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46
42
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47 class vt320Default extends vt320 {
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48 @Override
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49 public void debug(String s) {
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50 Log.d(TAG, s);
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51 }
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52
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53 // monitor injecting a field
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54 //@Override
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55 //public void setField(int l, int c, char [] data)
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56 // implementation in the base vt320
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57
148
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58 // terminal key listener found special key, send notification to monitor
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59 @Override
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60 public void monitorKey(boolean down) {
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61 if (bridge.monitor != null) bridge.monitor.keyState(down);
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62 }
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63
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64 // terminal key listener sending to the host
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65 @Override
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66 public void write(byte[] b) {
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67 try {
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68 AbsTransport.this.write(b);
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69 }
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70 catch (IOException e) {
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71 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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72 }
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73 }
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74 @Override
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75 public void write(int b) {
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76 try {
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77 AbsTransport.this.write(b);
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78 }
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79 catch (IOException e) {
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80 Log.e(TAG, "Problem writing outgoing data in vt320() thread", e);
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81 }
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82 }
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83
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84 // We don't use telnet sequences.
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85 @Override
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86 public void sendTelnetCommand(byte cmd) {
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87 }
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88 // We don't want remote to resize our window.
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89 @Override
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90 public void setWindowSize(int c, int r) {
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91 }
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92 // play beep noise
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93 @Override
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94 public void beep() {
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95 if ((bridge.parent != null) && (bridge.parent.isShown()))
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96 manager.playBeep();
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97 else
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98 manager.sendActivityNotification(host);
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99 }
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100
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101 // test for changed screen contents
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102 @Override
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103 public void testChanged() {
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104 if (bridge.monitor != null) bridge.monitor.testChanged();
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105 }
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106 // relay socket writing to the screen
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107 // bridge.monitor placement of new characters
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108 @Override
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109 public void putChar(int c, int l, char ch, int attributes) {
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110 if (bridge.monitor != null) bridge.monitor.screenChanged(l, c);
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111
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112 super.putChar(c, l, ch, attributes);
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113 }
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114 @Override
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115 public void insertChar(int c, int l, char ch, int attributes) {
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116 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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117
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118 super.insertChar(c, l, ch, attributes);
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119 }
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120 @Override
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121 public void insertLine(int l, int n, boolean scrollDown) {
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122 if (bridge.monitor != null) {
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123 if (scrollDown) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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124 else bridge.monitor.screenChanged(0, l, 0, width - 1);
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125 }
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126
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127 super.insertLine(l, n, scrollDown);
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128 }
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129 @Override
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130 public void deleteLine(int l) {
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131 if (bridge.monitor != null) bridge.monitor.screenChanged(l, height - 1, 0, width - 1);
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132
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133 super.deleteLine(l);
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134 }
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135 @Override
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136 public void deleteChar(int c, int l) {
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137 if (bridge.monitor != null) bridge.monitor.screenChanged(l, l, c, width - 1);
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138
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139 super.deleteChar(c, l);
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140 }
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141 @Override
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142 public void setCursorPosition(int c, int l) {
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143 if (bridge.monitor != null) bridge.monitor.cursorMove(l, c);
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144
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145 super.setCursorPosition(c, l);
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146 }
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147
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148 };
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149
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150
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151 public AbsTransport() {}
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152
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153 /**
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154 * @return protocol part of the URI
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155 */
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156 public static String getProtocolName() {
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157 return "unknown";
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158 }
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159
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160 /**
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161 * Encode the current transport into a URI that can be passed via intent calls.
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162 * @return URI to host
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163 */
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164 public abstract Uri getUri(String input);
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165
0
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166
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167 /**
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168 * Causes transport to connect to the target host. After connecting but before a
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169 * session is started, must call back to {@link TerminalBridge#onConnected()}.
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170 * After that call a session may be opened.
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171 */
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172 public abstract void connect();
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173
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174 /**
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175 * Checks if read() will block. If there are no bytes remaining in
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176 * the underlying transport, return true.
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177 */
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178 public abstract boolean willBlock();
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179
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180 /**
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181 * Reads from the transport. Transport must support reading into a byte array
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182 * <code>buffer</code> at the start of <code>offset</code> and a maximum of
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183 * <code>length</code> bytes. If the remote host disconnects, throw an
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184 * {@link IOException}.
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185 * @param buffer byte buffer to store read bytes into
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186 * @param offset where to start writing in the buffer
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187 * @param length maximum number of bytes to read
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188 * @return number of bytes read
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189 * @throws IOException when remote host disconnects
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190 */
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191 public abstract int read(byte[] buffer, int offset, int length) throws IOException;
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192
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193 /**
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194 * Writes to the transport. If the host is not yet connected, simply return without
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195 * doing anything. An {@link IOException} should be thrown if there is an error after
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196 * connection.
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197 * @param buffer bytes to write to transport
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198 * @throws IOException when there is a problem writing after connection
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199 */
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200 public abstract void write(byte[] buffer) throws IOException;
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201
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202 /**
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203 * Writes to the transport. See {@link #write(byte[])} for behavior details.
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204 * @param c character to write 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 write(int c) throws IOException;
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208
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209 /**
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210 * Flushes the write commands to the transport.
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211 * @throws IOException when there is a problem writing after connection
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212 */
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213 public abstract void flush() throws IOException;
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214
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215 /**
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216 * Closes the connection to the terminal. Note that the resulting failure to read
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217 * should call {@link TerminalBridge#dispatchDisconnect(boolean)}.
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218 */
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219 public abstract void close();
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220
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221 /**
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222 * Tells the transport what dimensions the display is currently
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223 * @param columns columns of text
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224 * @param rows rows of text
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225 * @param width width in pixels
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226 * @param height height in pixels
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227 */
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228 public abstract void setDimensions(int columns, int rows, int width, int height);
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229
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230 public void setOptions(Map<String, String> options) {
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231 // do nothing
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232 }
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233
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234 public Map<String, String> getOptions() {
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235 return null;
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236 }
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237
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238 public void setCompression(boolean compression) {
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239 // do nothing
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240 }
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241
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242 public void setHttpproxy(String httpproxy) {
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243 // do nothing
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244 }
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245
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246 public void setUseAuthAgent(String useAuthAgent) {
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247 // do nothing
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248 }
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249
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250 public String getEmulation() {
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251 return emulation;
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252 }
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253
47
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254 protected vt320 setupTransportBuffer() {
42
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255 int scrollback = (host.getWantSession()) ? manager.getScrollback() : 0;
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256 buffer.setBufferSize(scrollback);
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257 buffer.setDisplay(bridge);
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258 return buffer;
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259 }
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260
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261 public vt320 getTransportBuffer() {
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262 buffer = new vt320Default();
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263 return setupTransportBuffer();
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264 }
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265
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266 public void setLinks(TerminalManager manager, TerminalBridge bridge, String homeDirectory, HostBean host, String emulation) {
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267 this.manager = manager;
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268 this.bridge = bridge;
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269 this.homeDirectory = homeDirectory;
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270 this.host = host;
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271 this.emulation = emulation;
0
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272 }
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273
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274 /**
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275 * Whether or not this transport type can forward ports.
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276 * @return true on ability to forward ports
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277 */
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278 public boolean canForwardPorts() {
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279 return false;
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280 }
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281
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282 /**
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283 * Adds the {@link PortForwardBean} to the list.
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284 * @param portForward the port forward bean to add
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285 * @return true on successful addition
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286 */
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287 public boolean addPortForward(PortForwardBean portForward) {
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288 return false;
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289 }
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290
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291 /**
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292 * Enables a port forward member. After calling this method, the port forward should
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293 * be operational iff it could be enabled by the transport.
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294 * @param portForward member of our current port forwards list to enable
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295 * @return true on successful port forward setup
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296 */
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297 public boolean enablePortForward(PortForwardBean portForward) {
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298 return false;
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299 }
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300
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301 /**
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302 * Disables a port forward member. After calling this method, the port forward should
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303 * be non-functioning iff it could be disabled by the transport.
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304 * @param portForward member of our current port forwards list to enable
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305 * @return true on successful port forward tear-down
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306 */
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307 public boolean disablePortForward(PortForwardBean portForward) {
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308 return false;
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309 }
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310
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311 /**
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312 * Removes the {@link PortForwardBean} from the available port forwards.
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313 * @param portForward the port forward bean to remove
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314 * @return true on successful removal
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315 */
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316 public boolean removePortForward(PortForwardBean portForward) {
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317 return false;
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318 }
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319
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320 /**
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321 * Gets a list of the {@link PortForwardBean} currently used by this transport.
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322 * @return the list of port forwards
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323 */
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324 public List<PortForwardBean> getPortForwards() {
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325 return null;
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326 }
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327
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328 /**
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329 * Whether or not this transport type can transfer files.
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330 * @return true on ability to transfer files
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331 */
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332 public boolean canTransferFiles() {
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333 return false;
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334 }
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335
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336 /**
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337 * Downloads the specified remote file to a local folder.
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338 * @param remoteFile The path to the remote file to be downloaded. Must be non-null.
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339 * @param localFolder The path to local folder. Null = default external storage folder.
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340 * @return true on success, false on failure
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341 */
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342 public boolean downloadFile(String remoteFile, String localFolder) {
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343 return false;
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344 }
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345
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346 /**
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347 * Uploads the specified local file to the remote host.
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348 * @param localFile The path to the local file to be uploaded. Must be non-null.
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349 * @param remoteFolder The path to the remote directory. Null == default remote directory.
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350 * @return true on success, false on failure
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351 */
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352 public boolean uploadFile(String localFile, String remoteFile,
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353 String remoteFolder, String mode) {
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354 return false;
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355 }
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356
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357
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358 /**
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359 * @return int default port for protocol
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360 */
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361 public abstract int getDefaultPort();
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362 public abstract boolean isConnected();
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363 public abstract boolean isSessionOpen();
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364 public abstract boolean isAuthenticated();
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365
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366 /**
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367 * @param username
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368 * @param hostname
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369 * @param port
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370 * @return
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371 */
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372 public abstract String getDefaultNickname(String username, String hostname, int port);
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373
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374 /**
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375 * @param uri
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376 * @param selectionKeys
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377 * @param selectionValues
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378 */
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379 public abstract void getSelectionArgs(Uri uri, Map<String, String> selection);
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380
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381 /**
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382 * @param uri
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383 * @return
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384 */
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385 public abstract HostBean createHost(Uri uri);
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386
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387 /**
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388 * @param context context containing the correct resources
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389 * @return string that hints at the format for connection
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390 */
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391 public abstract String getFormatHint(Context context);
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392
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393 /**
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394 * @return do we use the network
0
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395 */
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396 public abstract boolean usesNetwork();
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397
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398 /**
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399 * @return do we need a relay object to read from the transport
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400 * and send the data into the vt320 buffer
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401 */
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402 public boolean needsRelay() {
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403 return true;
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404 }
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405
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406 /**
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407 * @return a key listener
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408 */
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409 public TerminalKeyListener getTerminalKeyListener() {
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410 return new TerminalKeyListener(manager, bridge, buffer, host.getEncoding());
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411 }
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412
0
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413 }