Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/service/TerminalMonitor.java @ 415:885f2bca6032
avoid null pointer
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Mon, 27 Oct 2014 13:55:13 -0700 |
| parents | 057854c77217 |
| children | 4dcc071e1feb |
| rev | line source |
|---|---|
| 0 | 1 package com.five_ten_sg.connectbot.service; |
| 2 | |
| 3 import android.content.ComponentName; | |
| 4 import android.content.Context; | |
| 5 import android.content.Intent; | |
| 6 import android.content.ServiceConnection; | |
| 155 | 7 import android.net.Uri; |
| 0 | 8 import android.os.IBinder; |
| 9 import android.util.Log; | |
| 10 import android.view.View; | |
| 11 import de.mud.terminal.vt320; | |
| 12 import java.io.IOException; | |
| 13 import java.io.InputStream; | |
| 14 import java.io.OutputStream; | |
| 15 import java.net.InetAddress; | |
| 16 import java.net.Socket; | |
| 17 import java.nio.charset.Charset; | |
|
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18 import java.util.Arrays; |
| 0 | 19 import java.util.HashMap; |
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20 import java.util.concurrent.ArrayBlockingQueue; |
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21 import java.util.concurrent.BlockingQueue; |
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22 import java.util.concurrent.ConcurrentHashMap; |
| 0 | 23 |
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24 import com.five_ten_sg.connectbot.ConsoleActivity; |
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25 import com.five_ten_sg.connectbot.bean.HostBean; |
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26 |
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27 |
| 0 | 28 public class TerminalMonitor { |
| 29 public final static String TAG = "ConnectBot.TerminalMonitor"; | |
| 30 | |
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31 public static final char MONITOR_CMD_INIT = 0; |
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32 public static final char MONITOR_CMD_ACTIVATE = 1; |
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33 public static final char MONITOR_CMD_KEYSTATE = 2; |
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34 public static final char MONITOR_CMD_CURSORMOVE = 3; |
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35 public static final char MONITOR_CMD_SCREENCHANGE = 4; |
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36 public static final char MONITOR_CMD_FIELDVALUE = 5; |
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37 public static final char MONITOR_CMD_SETFIELD = 5; |
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38 public static final char MONITOR_CMD_GETFIELD = 6; |
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39 public static final char MONITOR_CMD_SCREENWATCH = 7; |
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40 public static final char MONITOR_CMD_DEPRESS = 8; |
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41 public static final char MONITOR_CMD_SHOWURL = 9; |
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42 public static final char MONITOR_CMD_SWITCHSESSION = 10; |
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43 public static final char MONITOR_CMD_CURSORREQUEST = 11; |
| 0 | 44 |
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45 public static final char CURSOR_REQUESTED = 0; |
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46 public static final char CURSOR_SCREEN_CHANGE = 1; |
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47 public static final char CURSOR_USER_KEY = 2; |
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48 |
| 0 | 49 private static final int MONITORPORT = 6000; |
| 50 private static final String LOCALHOST = "127.0.0.1"; | |
| 51 | |
| 52 private Context parent = null; | |
| 53 private vt320 buffer = null; | |
| 54 private View view = null; | |
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55 private HostBean host = null; |
| 0 | 56 private String init = null; |
| 57 private int start_line = 0; // monitor part of the screen for changes | |
| 58 private int end_line = 500; // "" | |
| 59 private int start_column = 0; // "" | |
| 60 private int end_column = 500; // "" | |
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61 private boolean modified = false; // used to delay screen change notifications |
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62 private boolean moved = false; // used to delay cursor moved notifications |
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63 private int to_line = 0; // "" |
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64 private int to_column = 0; // "" |
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65 private HashMap<Integer, Integer> keymap = null; // map MS VK_ keys to vt320 virtual keys |
| 0 | 66 private IBinder bound = null; |
| 67 private Socket monitor_socket = null; | |
| 68 private InputStream monitor_in = null; | |
| 69 private OutputStream monitor_out = null; | |
| 70 private MyReader monitor_reader = null; | |
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71 private BlockingQueue<char[]> pending_commands = new ArrayBlockingQueue<char[]>(100); |
| 0 | 72 private MyServiceConnection monitor_connection = new MyServiceConnection(); |
| 73 | |
| 74 class MyReader extends Thread { | |
| 75 private InputStream monitor_in; | |
| 76 private byte[] b; | |
| 77 private boolean is_closing = false; | |
| 78 | |
| 79 public MyReader(InputStream monitor_in) { | |
| 80 this.monitor_in = monitor_in; | |
| 81 b = new byte[100]; | |
| 82 Log.i(TAG, "MyReader constructor"); | |
| 83 } | |
| 84 | |
| 85 public void closing() { | |
| 86 is_closing = true; | |
| 87 } | |
| 88 | |
| 89 private char[] forceRead(int len) throws IOException { | |
| 90 int len2 = len * 2; | |
| 91 int off = 0; | |
| 92 | |
| 93 if (b.length < len2) b = new byte[len2]; | |
| 94 | |
| 95 while (off < len2) { | |
| 96 int l = monitor_in.read(b, off, len2 - off); | |
| 97 | |
| 98 if (l < 0) throw new IOException("eof"); | |
| 99 | |
| 100 off += l; | |
| 101 } | |
| 102 | |
| 103 return bytesToChars(b, len2); | |
| 104 } | |
| 105 | |
| 106 public void run() { | |
| 107 while (true) { | |
| 108 try { | |
| 109 char[] len = forceRead(1); | |
| 110 char[] packet = forceRead(len[0]); | |
| 111 char cmd = packet[0]; | |
| 112 Log.i(TAG, String.format("received %d command", (int)cmd)); | |
| 113 | |
| 114 switch (cmd) { | |
| 115 case MONITOR_CMD_SETFIELD: | |
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116 if (packet.length >= 3) |
| 0 | 117 setField(packet[1], packet[2], packet, 3); |
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118 |
| 0 | 119 break; |
| 120 | |
| 121 case MONITOR_CMD_GETFIELD: | |
| 122 if (packet.length == 4) | |
| 123 getField(packet[1], packet[2], packet[3]); | |
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124 |
| 0 | 125 break; |
| 126 | |
| 127 case MONITOR_CMD_SCREENWATCH: | |
| 128 if (packet.length == 4) | |
| 129 screenWatch(packet[1], packet[2], packet[3]); | |
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130 |
| 0 | 131 break; |
| 132 | |
| 133 case MONITOR_CMD_DEPRESS: | |
| 134 if (packet.length == 2) | |
| 135 depress(packet[1]); | |
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136 |
| 0 | 137 break; |
| 138 | |
| 155 | 139 case MONITOR_CMD_SHOWURL: |
| 140 if (packet.length > 1) | |
| 141 showUrl(packet, 1); | |
| 142 | |
| 143 break; | |
| 144 | |
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145 case MONITOR_CMD_SWITCHSESSION: |
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146 if (packet.length == 1) |
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147 switchSession(); |
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148 |
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149 break; |
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150 |
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151 case MONITOR_CMD_CURSORREQUEST: |
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152 if (packet.length == 1) |
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153 cursorRequest(); |
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154 |
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155 break; |
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156 |
| 0 | 157 default: |
| 158 break; | |
| 159 } | |
| 160 } | |
| 161 catch (IOException e) { | |
| 162 if (!is_closing) Log.e(TAG, "exception in MyReader.run()", e); | |
| 163 | |
| 164 break; | |
| 165 } | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 class MyServiceConnection implements ServiceConnection { | |
| 171 public void onServiceConnected(ComponentName className, IBinder service) { | |
| 172 bound = service; | |
| 173 Log.i(TAG, "bound to service"); | |
| 174 | |
| 175 try { | |
| 176 InetAddress serverAddr = InetAddress.getByName(LOCALHOST); | |
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177 int tries = 0; |
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178 while (tries < 10) { |
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179 try { |
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180 Thread.sleep(100); |
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181 monitor_socket = new Socket(serverAddr, MONITORPORT); |
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182 } |
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183 catch (Exception e) { |
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184 Log.e(TAG, "exception connecting to monitor socket", e); |
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185 tries = tries + 1; |
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186 } |
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187 } |
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188 Log.i(TAG, "connected to monitor socket, send init " + init); |
| 0 | 189 monitor_in = monitor_socket.getInputStream(); |
| 190 monitor_out = monitor_socket.getOutputStream(); | |
| 191 monitor_reader = new MyReader(monitor_in); | |
| 192 monitor_reader.start(); | |
| 193 String x = " " + init; | |
| 194 monitorWrite(MONITOR_CMD_INIT, x.toCharArray()); | |
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195 char [] c; |
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196 |
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197 while (true) { |
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198 c = pending_commands.poll(); |
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199 |
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200 if (c == null) break; |
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201 |
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202 monitorWrite(c[1], c); |
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203 } |
| 0 | 204 } |
| 205 catch (IOException e) { | |
| 206 Log.e(TAG, "exception in onServiceConnected()", e); | |
| 207 } | |
| 208 } | |
| 209 public void onServiceDisconnected(ComponentName classNam) { | |
| 210 bound = null; | |
| 211 Log.i(TAG, "unbound from service"); | |
| 212 } | |
| 213 }; | |
| 214 | |
| 215 | |
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216 public TerminalMonitor(Context parent, vt320 buffer, View view, HostBean host, String init) { |
| 0 | 217 this.parent = parent; |
| 218 this.buffer = buffer; | |
| 219 this.view = view; | |
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220 this.host = host; |
| 0 | 221 this.init = init; |
| 222 // setup the windows->android keymapping | |
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223 // http://msdn.microsoft.com/en-us/library/windows/desktop/dd375731 |
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224 keymap = new HashMap<Integer, Integer>(); |
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225 keymap.put(0x08, vt320.KEY_BACK_SPACE); // vk_back |
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226 keymap.put(0x09, vt320.KEY_TAB); // vk_tab |
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227 keymap.put(0x0d, vt320.KEY_ENTER); // vk_return |
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228 keymap.put(0x1b, vt320.KEY_ESCAPE); // vk_escape |
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229 keymap.put(0x21, vt320.KEY_PAGE_UP); // vk_prior |
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230 keymap.put(0x22, vt320.KEY_PAGE_DOWN); // vk_next |
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231 keymap.put(0x23, vt320.KEY_END); // vk_end |
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232 keymap.put(0x24, vt320.KEY_HOME); // vk_home |
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233 keymap.put(0x25, vt320.KEY_LEFT); // vk_left |
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234 keymap.put(0x26, vt320.KEY_UP); // vk_up |
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235 keymap.put(0x27, vt320.KEY_RIGHT); // vk_right |
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236 keymap.put(0x28, vt320.KEY_DOWN); // vk_down |
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237 keymap.put(0x2d, vt320.KEY_INSERT); // vk_insert |
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238 keymap.put(0x2e, vt320.KEY_DELETE); // vk_delete |
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239 keymap.put(0x70, vt320.KEY_F1); // vk_f1 |
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240 keymap.put(0x71, vt320.KEY_F2); // vk_f2 |
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241 keymap.put(0x72, vt320.KEY_F3); // vk_f3 |
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242 keymap.put(0x73, vt320.KEY_F4); // vk_f4 |
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243 keymap.put(0x74, vt320.KEY_F5); // vk_f5 |
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244 keymap.put(0x75, vt320.KEY_F6); // vk_f6 |
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245 keymap.put(0x76, vt320.KEY_F7); // vk_f7 |
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246 keymap.put(0x77, vt320.KEY_F8); // vk_f8 |
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247 keymap.put(0x78, vt320.KEY_F9); // vk_f9 |
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248 keymap.put(0x79, vt320.KEY_F10); // vk_f10 |
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249 keymap.put(0x7a, vt320.KEY_F11); // vk_f11 |
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250 keymap.put(0x7b, vt320.KEY_F12); // vk_f12 |
| 176 | 251 keymap.put(0x7c, vt320.KEY_F13); // vk_f13 |
| 252 keymap.put(0x7d, vt320.KEY_F14); // vk_f14 | |
| 253 keymap.put(0x7e, vt320.KEY_F15); // vk_f15 | |
| 254 keymap.put(0x7f, vt320.KEY_F16); // vk_f16 | |
| 255 keymap.put(0x80, vt320.KEY_F17); // vk_f17 | |
| 256 keymap.put(0x81, vt320.KEY_F18); // vk_f18 | |
| 257 keymap.put(0x82, vt320.KEY_F19); // vk_f19 | |
| 258 keymap.put(0x83, vt320.KEY_F20); // vk_f20 | |
| 259 keymap.put(0x84, vt320.KEY_F21); // vk_f21 | |
| 260 keymap.put(0x85, vt320.KEY_F22); // vk_f22 | |
| 261 keymap.put(0x86, vt320.KEY_F23); // vk_f23 | |
| 262 keymap.put(0x87, vt320.KEY_F24); // vk_f24 | |
| 0 | 263 // bind to the monitor service |
| 264 Intent intent = new Intent("com.five_ten_sg.connectbot.monitor.MonitorService"); | |
| 265 parent.bindService(intent, monitor_connection, Context.BIND_AUTO_CREATE); | |
| 266 Log.i(TAG, "constructor"); | |
| 267 } | |
| 268 | |
| 269 | |
| 270 public void Disconnect() { | |
| 271 if (monitor_reader != null) monitor_reader.closing(); | |
|
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272 |
| 0 | 273 try { |
| 274 if (monitor_out != null) monitor_out.close(); | |
| 275 | |
| 276 if (monitor_in != null) monitor_in.close(); | |
| 277 | |
| 278 if (monitor_socket != null) monitor_socket.close(); | |
| 279 | |
| 280 Log.i(TAG, "disconnected from monitor socket"); | |
| 281 } | |
| 282 catch (IOException e) { | |
| 283 Log.e(TAG, "exception in Disconnect() closing sockets", e); | |
| 284 } | |
| 285 | |
| 286 monitor_reader = null; | |
| 287 monitor_out = null; | |
| 288 monitor_in = null; | |
| 289 monitor_socket = null; | |
| 290 | |
| 291 if (bound != null) parent.unbindService(monitor_connection); | |
| 292 | |
| 293 monitor_connection = null; | |
| 294 } | |
| 295 | |
| 296 | |
| 297 public char[] bytesToChars(byte[] b, int len) { | |
| 298 char[] c = new char[len >> 1]; | |
| 299 int bp = 0; | |
| 300 | |
| 301 for (int i = 0; i < c.length; i++) { | |
| 302 byte b1 = b[bp++]; | |
| 303 byte b2 = b[bp++]; | |
| 304 c[i] = (char)(((b1 & 0x00FF) << 8) + (b2 & 0x00FF)); | |
| 305 } | |
| 306 | |
| 307 return c; | |
| 308 } | |
| 309 | |
| 310 | |
| 311 public byte[] charsToBytes(char[] c) { | |
| 312 byte[] b = new byte[c.length << 1]; | |
| 313 int bp = 0; | |
| 314 | |
| 315 for (int i = 0; i < c.length; i++) { | |
| 316 b[bp++] = (byte)((c[i] & 0xff00) >> 8); | |
| 317 b[bp++] = (byte)(c[i] & 0x00ff); | |
| 318 } | |
| 319 | |
| 320 return b; | |
| 321 } | |
| 322 | |
| 323 | |
|
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324 public synchronized void monitorWrite(char cmd, char[] c) { |
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325 try { |
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326 if (monitor_out != null) { |
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327 c[0] = (char)(c.length - 1); // number of chars following |
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328 c[1] = cmd; |
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329 //Log.i(TAG, String.format("sending %d command", (int)cmd)); |
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330 monitor_out.write(charsToBytes(c)); |
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331 } |
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332 else { |
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333 c[1] = cmd; |
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334 pending_commands.put(c); |
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335 } |
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336 } |
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337 catch (InterruptedException e) { |
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338 Log.e(TAG, "exception in monitorWrite()", e); |
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339 } |
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340 catch (IOException e) { |
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341 Log.i(TAG, "exception in monitorWrite(), monitor died or closed the socket", e); |
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342 |
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343 try { |
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344 monitor_out.close(); |
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345 } |
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346 catch (IOException ee) { |
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347 Log.e(TAG, "exception in monitorWrite() closing output stream", ee); |
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348 } |
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349 |
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350 monitor_out = null; |
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351 } |
| 0 | 352 }; |
| 353 | |
|
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354 public void resetWatch() { |
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355 start_line = 0; |
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356 end_line = 500; |
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357 start_column = 0; |
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358 end_column = 500; |
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359 }; |
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360 |
| 0 | 361 public void sendScreen(char cmd) { |
| 362 char lines = (char)(buffer.height & 0x0000ffff); | |
| 363 char columns = (char)(buffer.width & 0x0000ffff); | |
| 364 char[] arg = new char[4 + lines * columns]; | |
| 365 arg[2] = lines; | |
| 366 arg[3] = columns; | |
| 367 int base = 4; | |
|
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368 |
| 0 | 369 for (int i = 0; i < lines; i++) { |
| 370 System.arraycopy(buffer.charArray[buffer.screenBase + i], 0, arg, base, columns); | |
| 371 base += columns; | |
| 372 } | |
|
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373 |
| 0 | 374 monitorWrite(cmd, arg); |
|
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375 resetWatch(); |
| 0 | 376 } |
| 377 | |
| 378 public synchronized void activate() { | |
| 379 sendScreen(MONITOR_CMD_ACTIVATE); | |
|
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380 cursorMoved(CURSOR_SCREEN_CHANGE); |
| 0 | 381 } |
| 382 | |
|
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383 public synchronized void keyState(boolean down) { |
| 0 | 384 char[] arg = new char[3]; |
|
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385 arg[2] = (char)((down) ? 1 : 0); |
|
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386 monitorWrite(MONITOR_CMD_KEYSTATE, arg); |
| 0 | 387 } |
| 388 | |
| 389 public synchronized void cursorMove(int l, int c) { | |
|
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390 if ((to_line != l) || (to_column != c)) moved = true; |
| 307 | 391 |
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392 to_line = l; |
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393 to_column = c; |
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394 } |
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395 |
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396 public void cursorMoved(char why) { |
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397 char[] arg = new char[5]; |
|
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398 arg[2] = (char)(to_line & 0x0000ffff); |
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399 arg[3] = (char)(to_column & 0x0000ffff); |
|
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400 arg[4] = why; |
| 0 | 401 monitorWrite(MONITOR_CMD_CURSORMOVE, arg); |
|
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402 moved = false; |
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403 } |
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404 |
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405 public void testMoved() { |
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406 if (moved) cursorMoved(CURSOR_USER_KEY); |
| 0 | 407 } |
| 408 | |
| 409 public synchronized void testChanged() { | |
| 410 if (modified) { | |
| 411 modified = false; | |
| 412 sendScreen(MONITOR_CMD_SCREENCHANGE); | |
|
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413 cursorMoved(CURSOR_SCREEN_CHANGE); |
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414 } |
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415 else { |
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416 if (moved) cursorMoved(CURSOR_SCREEN_CHANGE); |
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417 } |
| 0 | 418 } |
| 419 | |
| 420 public synchronized void screenChanged(int llow, int lhigh, int clow, int chigh) { | |
| 421 if ((start_line <= lhigh) && (llow <= end_line) && (start_column <= chigh) && (clow <= end_column)) { | |
| 422 modified = true; | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 public synchronized void screenChanged(int l, int c) { | |
| 427 screenChanged(l, l, c, c); | |
| 428 } | |
| 429 | |
| 430 public synchronized void setField(int l, int c, char[] data, int offset) { | |
| 431 Log.i(TAG, "setField()"); | |
|
250
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432 int len = data.length - offset; |
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433 char[] da = new char[len]; |
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434 System.arraycopy(data, offset, da, 0, len); |
| 307 | 435 |
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436 if ((l > 60000) || (c > 60000)) { |
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437 l = -1; |
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438 c = -1; |
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439 } |
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440 else { |
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441 // ignore setfield outside screen boundaries |
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442 if ((l >= buffer.height) || (c + len > buffer.width)) return; |
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443 } |
| 307 | 444 |
| 100 | 445 buffer.setField(l, c, da); |
| 0 | 446 } |
| 447 | |
| 155 | 448 public synchronized void showUrl(char [] data, int offset) { |
| 449 Log.i(TAG, "setField()"); | |
| 450 char[] da = new char[data.length - offset]; | |
| 307 | 451 System.arraycopy(data, offset, da, 0, data.length - offset); |
| 155 | 452 String url = new String(da); |
| 453 Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); | |
| 454 parent.startActivity(intent); | |
| 455 } | |
| 456 | |
| 0 | 457 public synchronized void getField(int l, int c, int len) { |
| 458 Log.i(TAG, "getField()"); | |
| 459 char[] arg2 = new char[4 + len]; | |
| 460 arg2[2] = (char)(l & 0x0000ffff); | |
| 461 arg2[3] = (char)(c & 0x0000ffff); | |
| 462 int base = 4; | |
| 307 | 463 |
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464 if ((l >= buffer.height) || (c + len > buffer.width)) { |
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465 Arrays.fill(arg2, base, base + len, ' '); |
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466 } |
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467 else { |
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468 System.arraycopy(buffer.charArray[buffer.screenBase + l], c, arg2, base, len); |
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469 } |
| 307 | 470 |
| 0 | 471 monitorWrite(MONITOR_CMD_FIELDVALUE, arg2); |
| 472 } | |
| 473 | |
| 474 public synchronized void screenWatch(int l, int c, int len) { | |
| 475 Log.i(TAG, "screenWatch()"); | |
| 476 start_line = l; | |
| 477 end_line = l; | |
| 478 start_column = c; | |
| 479 end_column = c + len - 1; | |
| 480 } | |
| 481 | |
| 482 public synchronized void depress(int vk_key) { | |
| 483 Log.i(TAG, String.format("depress() %d", vk_key)); | |
| 484 Integer x = keymap.get(new Integer(vk_key)); | |
| 307 | 485 |
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486 if (x != null) buffer.keyDepressed(x, ' ', 0); |
| 0 | 487 } |
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488 |
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489 public synchronized void switchSession() { |
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490 Log.i(TAG, "switchSession()"); |
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491 Intent intent = new Intent(parent, ConsoleActivity.class); |
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492 intent.setAction(Intent.ACTION_VIEW); |
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493 intent.setData(host.getUri()); |
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494 parent.startActivity(intent); |
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495 } |
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496 |
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497 |
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498 public synchronized void cursorRequest() { |
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499 Log.i(TAG, "cursorRequest()"); |
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500 cursorMoved(CURSOR_REQUESTED); |
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501 } |
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502 |
| 0 | 503 } |