vt320.java

The Javatm Telnet Application/Applet 很好用的

/* This file is part of "The Java Telnet Application".
 *
 * (c) Matthias L. Jugel, Marcus Mei\u00dfner 1996-2002. All Rights Reserved.
 *
 * Please visit http://javatelnet.org/ for updates and contact.
 *
 * --LICENSE NOTICE--
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * --LICENSE NOTICE--
 *
 */

package de.mud.terminal;

import java.util.Properties;
import java.awt.event.KeyEvent;

/**
 * Implementation of a VT terminal emulation plus ANSI compatible.
 * <P>
 * <B>Maintainer:</B> Marcus Mei\u00dfner
 *
 * @version $Id: vt320.java,v 2.97 2003/12/09 22:50:49 marcus Exp $
 * @author  Matthias L. Jugel, Marcus Mei\u00dfner
 */
public abstract class vt320 extends VDUBuffer implements VDUInput {
  /** The current version id tag.<P>
   * $Id: vt320.java,v 2.97 2003/12/09 22:50:49 marcus Exp $
   */
  public final static String ID = "$Id: vt320.java,v 2.97 2003/12/09 22:50:49 marcus Exp $";

  /** the debug level */
  private final static int debug = 0;

  /**
   * Write an answer back to the remote host. This is needed to be able to
   * send terminal answers requests like status and type information.
   * @param b the array of bytes to be sent
   */
  public abstract void write(byte[] b);

  /**
   * Play the beep sound ...
   */
  public void beep() { /* do nothing by default */
  }

  /**
   * Put string at current cursor position. Moves cursor
   * according to the String. Does NOT wrap.
   * @param s the string
   */
  public void putString(String s) {
    int len = s.length();
    // System.err.println("'"+s+"'");

    if (len > 0) {
      markLine(R, 1);
      for (int i = 0; i < len; i++) {
        // System.err.print(s.charAt(i)+"("+(int)s.charAt(i)+")");
        putChar(s.charAt(i), false);
      }
      setCursorPosition(C, R);
      redraw();
    }
  }

  protected void sendTelnetCommand(byte cmd) {
  }

  /**
   * Create a new vt320 terminal and intialize it with useful settings.
   */
  public vt320(int width, int height) {
    super(width, height);
    setVMS(false);
    setIBMCharset(false);
    setTerminalID("vt320");
    setBufferSize(100);
    //setBorder(2, false);

    int nw = getColumns();
    if (nw < 132) nw = 132; //catch possible later 132/80 resizes
    Tabs = new byte[nw];
    for (int i = 0; i < nw; i += 8) {
      Tabs[i] = 1;
    }

    /* top row of numpad */
    PF1 = "\u001bOP";
    PF2 = "\u001bOQ";
    PF3 = "\u001bOR";
    PF4 = "\u001bOS";

    /* the 3x2 keyblock on PC keyboards */
    Insert = new String[4];
    Remove = new String[4];
    KeyHome = new String[4];
    KeyEnd = new String[4];
    NextScn = new String[4];
    PrevScn = new String[4];
    Escape = new String[4];
    BackSpace = new String[4];
    TabKey = new String[4];
    Insert[0] = Insert[1] = Insert[2] = Insert[3] = "\u001b[2~";
    Remove[0] = Remove[1] = Remove[2] = Remove[3] = "\u001b[3~";
    PrevScn[0] = PrevScn[1] = PrevScn[2] = PrevScn[3] = "\u001b[5~";
    NextScn[0] = NextScn[1] = NextScn[2] = NextScn[3] = "\u001b[6~";
    KeyHome[0] = KeyHome[1] = KeyHome[2] = KeyHome[3] = "\u001b[H";
    KeyEnd[0] = KeyEnd[1] = KeyEnd[2] = KeyEnd[3] = "\u001b[F";
    Escape[0] = Escape[1] = Escape[2] = Escape[3] = "\u001b";
    if (vms) {
      BackSpace[1] = "" + (char) 10;	//  VMS shift deletes word back
      BackSpace[2] = "\u0018";	//  VMS control deletes line back
      BackSpace[0] = BackSpace[3] = "\u007f";	//  VMS other is delete
    } else {
      BackSpace[0] = BackSpace[1] = BackSpace[2] = BackSpace[3] = "\b";
    }

    /* some more VT100 keys */
    Find = "\u001b[1~";
    Select = "\u001b[4~";
    Help = "\u001b[28~";
    Do = "\u001b[29~";

    FunctionKey = new String[21];
    FunctionKey[0] = "";
    FunctionKey[1] = PF1;
    FunctionKey[2] = PF2;
    FunctionKey[3] = PF3;
    FunctionKey[4] = PF4;
    /* following are defined differently for vt220 / vt132 ... */
    FunctionKey[5] = "\u001b[15~";
    FunctionKey[6] = "\u001b[17~";
    FunctionKey[7] = "\u001b[18~";
    FunctionKey[8] = "\u001b[19~";
    FunctionKey[9] = "\u001b[20~";
    FunctionKey[10] = "\u001b[21~";
    FunctionKey[11] = "\u001b[23~";
    FunctionKey[12] = "\u001b[24~";
    FunctionKey[13] = "\u001b[25~";
    FunctionKey[14] = "\u001b[26~";
    FunctionKey[15] = Help;
    FunctionKey[16] = Do;
    FunctionKey[17] = "\u001b[31~";
    FunctionKey[18] = "\u001b[32~";
    FunctionKey[19] = "\u001b[33~";
    FunctionKey[20] = "\u001b[34~";

    FunctionKeyShift = new String[21];
    FunctionKeyAlt = new String[21];
    FunctionKeyCtrl = new String[21];

    for (int i = 0; i < 20; i++) {
      FunctionKeyShift[i] = "";
      FunctionKeyAlt[i] = "";
      FunctionKeyCtrl[i] = "";
    }
    FunctionKeyShift[15] = Find;
    FunctionKeyShift[16] = Select;


    TabKey[0] = "\u0009";
    TabKey[1] = "\u001bOP\u0009";
    TabKey[2] = TabKey[3] = "";

    KeyUp = new String[4];
    KeyUp[0] = "\u001b[A";
    KeyDown = new String[4];
    KeyDown[0] = "\u001b[B";
    KeyRight = new String[4];
    KeyRight[0] = "\u001b[C";
    KeyLeft = new String[4];
    KeyLeft[0] = "\u001b[D";
    Numpad = new String[10];
    Numpad[0] = "\u001bOp";
    Numpad[1] = "\u001bOq";
    Numpad[2] = "\u001bOr";
    Numpad[3] = "\u001bOs";
    Numpad[4] = "\u001bOt";
    Numpad[5] = "\u001bOu";
    Numpad[6] = "\u001bOv";
    Numpad[7] = "\u001bOw";
    Numpad[8] = "\u001bOx";
    Numpad[9] = "\u001bOy";
    KPMinus = PF4;
    KPComma = "\u001bOl";
    KPPeriod = "\u001bOn";
    KPEnter = "\u001bOM";

    NUMPlus = new String[4];
    NUMPlus[0] = "+";
    NUMDot = new String[4];
    NUMDot[0] = ".";
  }

  /**
   * Create a default vt320 terminal with 80 columns and 24 lines.
   */
  public vt320() {
    this(80, 24);
  }

  /**
   * Terminal is mouse-aware and requires (x,y) coordinates of
   * on the terminal (character coordinates) and the button clicked.
   * @param x
   * @param y
   * @param modifiers
   */
  public void mousePressed(int x, int y, int modifiers) {
    if (mouserpt == 0)
      return;

    int mods = modifiers;
    mousebut = 3;
    if ((mods & 16) == 16) mousebut = 0;
    if ((mods & 8) == 8) mousebut = 1;
    if ((mods & 4) == 4) mousebut = 2;

    int mousecode;
    if (mouserpt == 9)	/* X10 Mouse */
      mousecode = 0x20 | mousebut;
    else			/* normal xterm mouse reporting */
      mousecode = mousebut | 0x20 | ((mods & 7) << 2);

    byte b[] = new byte[6];

    b[0] = 27;
    b[1] = (byte) '[';
    b[2] = (byte) 'M';
    b[3] = (byte) mousecode;
    b[4] = (byte) (0x20 + x + 1);
    b[5] = (byte) (0x20 + y + 1);

    write(b); // FIXME: writeSpecial here
  }

  /**
   * Terminal is mouse-aware and requires the coordinates and button
   * of the release.
   * @param x
   * @param y
   * @param modifiers
   */
  public void mouseReleased(int x, int y, int modifiers) {
    if (mouserpt == 0)
      return;

    /* problem is tht modifiers still have the released button set in them.
    int mods = modifiers;
    mousebut = 3;
    if ((mods & 16)==16) mousebut=0;
    if ((mods &  8)==8 ) mousebut=1;
    if ((mods &  4)==4 ) mousebut=2;
    */

    int mousecode;
    if (mouserpt == 9)
      mousecode = 0x20 + mousebut;	/* same as press? appears so. */
    else
      mousecode = '#';

    byte b[] = new byte[6];
    b[0] = 27;
    b[1] = (byte) '[';
    b[2] = (byte) 'M';
    b[3] = (byte) mousecode;
    b[4] = (byte) (0x20 + x + 1);
    b[5] = (byte) (0x20 + y + 1);
    write(b); // FIXME: writeSpecial here
    mousebut = 0;
  }


  /** we should do localecho (passed from other modules). false is default */
  private boolean localecho = false;

  /**
   * Enable or disable the local echo property of the terminal.
   * @param echo true if the terminal should echo locally
   */
  public void setLocalEcho(boolean echo) {
    localecho = echo;
  }

  /**
   * Enable the VMS mode of the terminal to handle some things differently
   * for VMS hosts.
   * @param vms true for vms mode, false for normal mode
   */
  public void setVMS(boolean vms) {
    this.vms = vms;
  }

  /**
   * Enable the usage of the IBM character set used by some BBS's. Special
   * graphical character are available in this mode.
   * @param ibm true to use the ibm character set
   */
  public void setIBMCharset(boolean ibm) {
    useibmcharset = ibm;
  }

  /**
   * Override the standard key codes used by the terminal emulation.
   * @param codes a properties object containing key code definitions
   */
  public void setKeyCodes(Properties codes) {
    String res, prefixes[] = {"", "S", "C", "A"};
    int i;

    for (i = 0; i < 10; i++) {
      res = codes.getProperty("NUMPAD" + i);
      if (res != null) Numpad[i] = unEscape(res);
    }
    for (i = 1; i < 20; i++) {
      res = codes.getProperty("F" + i);
      if (res != null) FunctionKey[i] = unEscape(res);
      res = codes.getProperty("SF" + i);
      if (res != null) FunctionKeyShift[i] = unEscape(res);
      res = codes.getProperty("CF" + i);
      if (res != null) FunctionKeyCtrl[i] = unEscape(res);
      res = codes.getProperty("AF" + i);
      if (res != null) FunctionKeyAlt[i] = unEscape(res);
    }
    for (i = 0; i < 4; i++) {
      res = codes.getProperty(prefixes[i] + "PGUP");
      if (res != null) PrevScn[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "PGDOWN");
      if (res != null) NextScn[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "END");
      if (res != null) KeyEnd[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "HOME");
      if (res != null) KeyHome[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "INSERT");
      if (res != null) Insert[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "REMOVE");
      if (res != null) Remove[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "UP");
      if (res != null) KeyUp[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "DOWN");
      if (res != null) KeyDown[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "LEFT");
      if (res != null) KeyLeft[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "RIGHT");
      if (res != null) KeyRight[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "ESCAPE");
      if (res != null) Escape[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "BACKSPACE");
      if (res != null) BackSpace[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "TAB");
      if (res != null) TabKey[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "NUMPLUS");
      if (res != null) NUMPlus[i] = unEscape(res);
      res = codes.getProperty(prefixes[i] + "NUMDECIMAL");
      if (res != null) NUMDot[i] = unEscape(res);
    }
  }

  /**
   * Set the terminal id used to identify this terminal.
   * @param terminalID the id string
   */
  public void setTerminalID(String terminalID) {
    this.terminalID = terminalID;

    if (terminalID.equals("scoansi")) {
      FunctionKey[1] = "\u001b[M";  FunctionKey[2] = "\u001b[N";
      FunctionKey[3] = "\u001b[O";  FunctionKey[4] = "\u001b[P";
      FunctionKey[5] = "\u001b[Q";  FunctionKey[6] = "\u001b[R";
      FunctionKey[7] = "\u001b[S";  FunctionKey[8] = "\u001b[T";
      FunctionKey[9] = "\u001b[U";  FunctionKey[10] = "\u001b[V";
      FunctionKey[11] = "\u001b[W"; FunctionKey[12] = "\u001b[X";
      FunctionKey[13] = "\u001b[Y"; FunctionKey[14] = "?";
      FunctionKey[15] = "\u001b[a"; FunctionKey[16] = "\u001b[b";
      FunctionKey[17] = "\u001b[c"; FunctionKey[18] = "\u001b[d";
      FunctionKey[19] = "\u001b[e"; FunctionKey[20] = "\u001b[f";
      // more theoretically.
    }
  }

  public void setAnswerBack(String ab) {
    this.answerBack = unEscape(ab);
  }

  /**
   * Get the terminal id used to identify this terminal.
   */
  public String getTerminalID() {
    return terminalID;
  }

  /**