--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/five_ten_sg/connectbot/service/TerminalMonitor.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,366 @@
+package com.five_ten_sg.connectbot.service;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.view.View;
+import de.mud.terminal.vt320;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.nio.charset.Charset;
+import java.util.HashMap;
+
+public class TerminalMonitor {
+    public final static String TAG = "ConnectBot.TerminalMonitor";
+
+    public  static final char MONITOR_CMD_INIT         = 0;
+    public  static final char MONITOR_CMD_ACTIVATE     = 1;
+    public  static final char MONITOR_CMD_HOSTDATA     = 2;
+    public  static final char MONITOR_CMD_CURSORMOVE   = 3;
+    public  static final char MONITOR_CMD_SCREENCHANGE = 4;
+    public  static final char MONITOR_CMD_FIELDVALUE   = 5;
+    public  static final char MONITOR_CMD_SETFIELD     = 5;
+    public  static final char MONITOR_CMD_GETFIELD     = 6;
+    public  static final char MONITOR_CMD_SCREENWATCH  = 7;
+    public  static final char MONITOR_CMD_DEPRESS      = 8;
+
+    private static final int    MONITORPORT       = 6000;
+    private static final String LOCALHOST         = "127.0.0.1";
+
+    private Context             parent       = null;
+    private vt320               buffer       = null;
+    private TerminalKeyListener keyListener  = null;
+    private View                view         = null;
+    private String              init         = null;
+    private int                 start_line   = 0;       // monitor part of the screen for changes
+    private int                 end_line     = 500;     // ""
+    private int                 start_column = 0;       // ""
+    private int                 end_column   = 500;     // ""
+    private boolean             modified     = false;   // ""
+    private HashMap<Integer,Integer>  keymap = null;
+    private IBinder             bound        = null;
+    private Socket              monitor_socket = null;
+    private InputStream         monitor_in     = null;
+    private OutputStream        monitor_out    = null;
+    private MyReader            monitor_reader = null;
+    private MyServiceConnection monitor_connection = new MyServiceConnection();
+
+    class MyReader extends Thread {
+        private InputStream monitor_in;
+        private byte[] b;
+        private boolean is_closing = false;
+
+        public MyReader(InputStream monitor_in) {
+            this.monitor_in = monitor_in;
+            b = new byte[100];
+            Log.i(TAG, "MyReader constructor");
+        }
+
+        public void closing() {
+            is_closing = true;
+        }
+
+        private char[] forceRead(int len) throws IOException {
+            int len2 = len * 2;
+            int off  = 0;
+
+            if (b.length < len2) b = new byte[len2];
+
+            while (off < len2) {
+                int l = monitor_in.read(b, off, len2 - off);
+
+                if (l < 0) throw new IOException("eof");
+
+                off += l;
+            }
+
+            return bytesToChars(b, len2);
+        }
+
+        public void run() {
+            while (true) {
+                try {
+                    char[] len = forceRead(1);
+                    char[] packet = forceRead(len[0]);
+                    char cmd = packet[0];
+                    Log.i(TAG, String.format("received %d command", (int)cmd));
+
+                    switch (cmd) {
+                        case MONITOR_CMD_SETFIELD:
+                            if (packet.length >= 4)
+                                setField(packet[1], packet[2], packet, 3);
+                            break;
+
+                        case MONITOR_CMD_GETFIELD:
+                            if (packet.length == 4)
+                                getField(packet[1], packet[2], packet[3]);
+                            break;
+
+                        case MONITOR_CMD_SCREENWATCH:
+                            if (packet.length == 4)
+                                screenWatch(packet[1], packet[2], packet[3]);
+                            break;
+
+                        case MONITOR_CMD_DEPRESS:
+                            if (packet.length == 2)
+                                depress(packet[1]);
+                            break;
+
+                        default:
+                            break;
+                    }
+                }
+                catch (IOException e) {
+                    if (!is_closing) Log.e(TAG, "exception in MyReader.run()", e);
+
+                    break;
+                }
+            }
+        }
+    }
+
+    class MyServiceConnection implements ServiceConnection {
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            bound = service;
+            Log.i(TAG, "bound to service");
+
+            try {
+                InetAddress serverAddr = InetAddress.getByName(LOCALHOST);
+                monitor_socket = new Socket(serverAddr, MONITORPORT);
+                monitor_in     = monitor_socket.getInputStream();
+                monitor_out    = monitor_socket.getOutputStream();
+                Log.i(TAG, "connected to monitor socket, send init " + init);
+                monitor_reader = new MyReader(monitor_in);
+                monitor_reader.start();
+                String x = "  " + init;
+                monitorWrite(MONITOR_CMD_INIT, x.toCharArray());
+            }
+            catch (IOException e) {
+                Log.e(TAG, "exception in onServiceConnected()", e);
+            }
+        }
+        public void onServiceDisconnected(ComponentName classNam) {
+            bound = null;
+            Log.i(TAG, "unbound from service");
+        }
+    };
+
+
+    public TerminalMonitor(Context parent, vt320 buffer, TerminalKeyListener keyListener, View view, String init) {
+        this.parent      = parent;
+        this.buffer      = buffer;
+        this.keyListener = keyListener;
+        this.view        = view;
+        this.init        = init;
+
+        // setup the windows->android keymapping
+        // http://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx
+        // http://developer.android.com/reference/android/view/KeyEvent.html
+        keymap      = new HashMap<Integer,Integer>();
+        keymap.put(0x08, KeyEvent.KEYCODE_BACK);        // vk_back
+        keymap.put(0x09, KeyEvent.KEYCODE_TAB);         // vk_tab
+        keymap.put(0x0d, KeyEvent.KEYCODE_ENTER);       // vk_return
+        keymap.put(0x1b, KeyEvent.KEYCODE_ESCAPE);      // vk_escape
+        keymap.put(0x21, KeyEvent.KEYCODE_PAGE_UP);     // vk_prior
+        keymap.put(0x22, KeyEvent.KEYCODE_PAGE_DOWN);   // vk_next
+        keymap.put(0x23, KeyEvent.KEYCODE_MOVE_END);    // vk_end
+        keymap.put(0x24, KeyEvent.KEYCODE_MOVE_HOME);   // vk_home
+        keymap.put(0x25, KeyEvent.KEYCODE_DPAD_LEFT);   // vk_left
+        keymap.put(0x26, KeyEvent.KEYCODE_DPAD_UP);     // vk_up
+        keymap.put(0x27, KeyEvent.KEYCODE_DPAD_RIGHT);  // vk_right
+        keymap.put(0x28, KeyEvent.KEYCODE_DPAD_DOWN);   // vk_down
+        keymap.put(0x2d, KeyEvent.KEYCODE_INSERT);      // vk_insert
+        keymap.put(0x2e, KeyEvent.KEYCODE_DEL);         // vk_delete
+        keymap.put(0x70, KeyEvent.KEYCODE_F1);          // vk_f1
+        keymap.put(0x71, KeyEvent.KEYCODE_F2);          // vk_f2
+        keymap.put(0x72, KeyEvent.KEYCODE_F3);          // vk_f3
+        keymap.put(0x73, KeyEvent.KEYCODE_F4);          // vk_f4
+        keymap.put(0x74, KeyEvent.KEYCODE_F5);          // vk_f5
+        keymap.put(0x75, KeyEvent.KEYCODE_F6);          // vk_f6
+        keymap.put(0x76, KeyEvent.KEYCODE_F7);          // vk_f7
+        keymap.put(0x77, KeyEvent.KEYCODE_F8);          // vk_f8
+        keymap.put(0x78, KeyEvent.KEYCODE_F9);          // vk_f9
+        keymap.put(0x79, KeyEvent.KEYCODE_F10);         // vk_f10
+        keymap.put(0x7a, KeyEvent.KEYCODE_F11);         // vk_f11
+        keymap.put(0x7b, KeyEvent.KEYCODE_F12);         // vk_f12
+
+        // bind to the monitor service
+        Intent intent = new Intent("com.five_ten_sg.connectbot.monitor.MonitorService");
+        parent.bindService(intent, monitor_connection, Context.BIND_AUTO_CREATE);
+        Log.i(TAG, "constructor");
+    }
+
+
+    public void Disconnect() {
+        if (monitor_reader != null) monitor_reader.closing();
+
+        try {
+            if (monitor_out    != null) monitor_out.close();
+
+            if (monitor_in     != null) monitor_in.close();
+
+            if (monitor_socket != null) monitor_socket.close();
+
+            Log.i(TAG, "disconnected from monitor socket");
+        }
+        catch (IOException e) {
+            Log.e(TAG, "exception in Disconnect() closing sockets", e);
+        }
+
+        monitor_reader = null;
+        monitor_out    = null;
+        monitor_in     = null;
+        monitor_socket = null;
+
+        if (bound != null) parent.unbindService(monitor_connection);
+
+        monitor_connection = null;
+    }
+
+
+    public char[] bytesToChars(byte[] b, int len) {
+        char[] c = new char[len >> 1];
+        int bp = 0;
+
+        for (int i = 0; i < c.length; i++) {
+            byte b1 = b[bp++];
+            byte b2 = b[bp++];
+            c[i] = (char)(((b1 & 0x00FF) << 8) + (b2 & 0x00FF));
+        }
+
+        return c;
+    }
+
+
+    public byte[] charsToBytes(char[] c) {
+        byte[] b = new byte[c.length << 1];
+        int bp = 0;
+
+        for (int i = 0; i < c.length; i++) {
+            b[bp++] = (byte)((c[i] & 0xff00) >> 8);
+            b[bp++] = (byte)(c[i] & 0x00ff);
+        }
+
+        return b;
+    }
+
+
+    public synchronized void monitorWrite(char cmd, char[] c) {
+        try {
+            if (monitor_out != null) {
+                c[0] = (char)(c.length - 1);    // number of chars following
+                c[1] = cmd;
+                //Log.i(TAG, String.format("sending %d command", (int)cmd));
+                monitor_out.write(charsToBytes(c));
+            }
+        }
+        catch (IOException e) {
+            Log.i(TAG, "exception in monitorWrite(), monitor died or closed the socket", e);
+
+            try {
+                monitor_out.close();
+            }
+            catch (IOException ee) {
+                Log.e(TAG, "exception in monitorWrite() closing output stream", ee);
+            }
+
+            monitor_out = null;
+        }
+    };
+
+    public void sendScreen(char cmd) {
+        char lines   = (char)(buffer.height & 0x0000ffff);
+        char columns = (char)(buffer.width & 0x0000ffff);
+        char[] arg = new char[4 + lines * columns];
+        arg[2] = lines;
+        arg[3] = columns;
+        int base = 4;
+        for (int i = 0; i < lines; i++) {
+            System.arraycopy(buffer.charArray[buffer.screenBase + i], 0, arg, base, columns);
+            base += columns;
+        }
+        monitorWrite(cmd, arg);
+    }
+
+    public synchronized void activate() {
+        sendScreen(MONITOR_CMD_ACTIVATE);
+    }
+
+    public synchronized void hostData(byte[] b) {
+        for (int i = 0; i < b.length; i++) {
+            hostData((int)b[i] & 0xff);
+        }
+    }
+
+    public synchronized void hostData(int b) {
+        char[] arg = new char[3];
+        arg[2] = (char)(b & 0x0000ffff);
+        monitorWrite(MONITOR_CMD_HOSTDATA, arg);
+    }
+
+    public synchronized void cursorMove(int l, int c) {
+        char[] arg = new char[4];
+        arg[2] = (char)(l & 0x0000ffff);
+        arg[3] = (char)(c & 0x0000ffff);
+        monitorWrite(MONITOR_CMD_CURSORMOVE, arg);
+    }
+
+    public synchronized void testChanged() {
+        if (modified) {
+            modified = false;
+            sendScreen(MONITOR_CMD_SCREENCHANGE);
+        }
+    }
+
+    public synchronized void screenChanged(int llow, int lhigh, int clow, int chigh) {
+        if ((start_line <= lhigh) && (llow <= end_line) && (start_column <= chigh) && (clow <= end_column)) {
+            modified = true;
+        }
+    }
+
+    public synchronized void screenChanged(int l, int c) {
+        screenChanged(l, l, c, c);
+    }
+
+    public synchronized void setField(int l, int c, char[] data, int offset) {
+        Log.i(TAG, "setField()");
+        byte[] d = charsToBytes(data);
+        byte[] b = new byte[d.length - offset];
+        System.arraycopy(d, offset, b, 0, d.length - offset);
+        buffer.write(b);
+    }
+
+    public synchronized void getField(int l, int c, int len) {
+        Log.i(TAG, "getField()");
+        char[] arg2 = new char[4 + len];
+        arg2[2] = (char)(l & 0x0000ffff);
+        arg2[3] = (char)(c & 0x0000ffff);
+        int base = 4;
+        System.arraycopy(buffer.charArray[buffer.screenBase + l], c, arg2, base, len);
+        monitorWrite(MONITOR_CMD_FIELDVALUE, arg2);
+    }
+
+    public synchronized void screenWatch(int l, int c, int len) {
+        Log.i(TAG, "screenWatch()");
+        start_line   = l;
+        end_line     = l;
+        start_column = c;
+        end_column   = c + len - 1;
+    }
+
+    public synchronized void depress(int vk_key) {
+        Log.i(TAG, String.format("depress() %d", vk_key));
+        Integer x = keymap.get(new Integer(vk_key));
+        if (x != null) {
+            KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, x.intValue());
+            keyListener.onKey(view, event.getKeyCode(), event);
+        }
+    }
+}