/*
 * This file is part of "JTA - Telnet/SSH for the JAVA(tm) platform".
 *
 * (c) Matthias L. Jugel, Marcus Meiner 1996-2005. 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 android.text.AndroidCharacter;

import java.util.Properties;

/**
 * Implementation of a VT terminal emulation plus ANSI compatible.
 * <P>
 * <B>Maintainer:</B> Marcus Meißner
 *
 * @version $Id: vt320.java 507 2005-10-25 10:14:52Z marcus $
 * @author  Matthias L. Jugel, Marcus Meißner
 */
public abstract class vt320 extends VDUBuffer implements VDUInput {

    /** the debug level */
    private final static int debug = 0;
    private StringBuilder debugStr;
    public abstract void debug(String notice);

    /**
     * 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);

    /**
     * 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 byte to be sent
     */
    public abstract void write(int b);

    /**
     * No more bytes to read from the transport, hook here to test screen changes
     */
    public void testChanged() {
        /* do nothing by default */
    }

    /**
     * inject field contents as if typed
     */
    public void setField(int l, int c, char [] d) {
        // ignore line and column, just send the bytes to the host.
        int n = d.length;
        byte [] b = new byte [n];

        for (int i = 0; i < n; i++) b[i] = (byte)(d[i] & 0x00ff);

        write(b);
    }

    public void monitorKey(boolean down) {
        // do nothing
    }

    public void keyDepressed(int keyCode, char keyChar, int modifiers) {
        keyPressed(keyCode, keyChar, modifiers);
    }

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

    public void redrawPassthru() {
        redraw();   // VDUBuffer.redraw is protected
    }

    /**
     * Convenience function for putString(char[], int, int)
     */
    public void putString(String s) {
        int len = s.length();
        char[] tmp = new char[len];
        s.getChars(0, len, tmp, 0);
        putString(tmp, null, 0, len);
    }

    /**
     * Put string at current cursor position. Moves cursor
     * according to the String. Does NOT wrap.
     * @param s character array
     * @param start place to start in array
     * @param len number of characters to process
     */
    public void putString(char[] s, byte[] fullwidths, int start, int len) {
        if (len > 0) {
            //markLine(R, 1);
            int lastChar = -1;
            char c;
            boolean isWide = false;

            for (int i = 0; i < len; i++) {
                c = s[start + i];

                // Shortcut for my favorite ASCII
                if (c <= 0x7F) {
                    if (lastChar != -1)
                        putChar((char) lastChar, isWide, false);

                    lastChar = c;
                    isWide = false;
                }
                else if (!Character.isLowSurrogate(c) && !Character.isHighSurrogate(c)) {
                    if (Character.getType(c) == Character.NON_SPACING_MARK) {
                        if (lastChar != -1) {
                            char nc = Precomposer.precompose((char) lastChar, c);
                            putChar(nc, isWide, false);
                            lastChar = -1;
                        }
                    }
                    else {
                        if (lastChar != -1)
                            putChar((char) lastChar, isWide, false);

                        lastChar = c;

                        if (fullwidths != null) {
                            final byte width = fullwidths[i];
                            isWide = (width == AndroidCharacter.EAST_ASIAN_WIDTH_WIDE)
                                     || (width == AndroidCharacter.EAST_ASIAN_WIDTH_FULL_WIDTH);
                        }
                    }
                }
            }

            if (lastChar != -1)
                putChar((char) lastChar, isWide, false);

            setCursorPosition(C, R);
            redraw();
        }
    }

    protected void sendTelnetCommand(byte cmd) {
        /* do nothing by default */
    }

    /**
     * Sent the changed window size from the terminal to all listeners.
     */
    protected void setWindowSize(int c, int r) {
        /* To be overridden by Terminal.java */
    }

    @Override
    public void setScreenSize(int c, int r, boolean broadcast) {
        int oldrows = height;

        if (debug > 2) {
            if (debugStr == null)
                debugStr = new StringBuilder();

            debugStr.append("setscreensize (")
            .append(c)
            .append(',')
            .append(r)
            .append(',')
            .append(broadcast)
            .append(')');
            debug(debugStr.toString());
            debugStr.setLength(0);
        }

        super.setScreenSize(c, r, false);
        boolean cursorChanged = false;

        // Don't let the cursor go off the screen.
        if (C >= c) {
            C = c - 1;
            cursorChanged = true;
        }

        if (R >= r) {
            R = r - 1;
            cursorChanged = true;
        }

        if (cursorChanged) {
            setCursorPosition(C, R);
            redraw();
        }

        if (broadcast) {
            setWindowSize(c, r);  /* broadcast up */
        }
    }


    /**
     * Create a new vt320 terminal and intialize it with useful settings.
     */
    public vt320(int width, int height) {
        super(width, height);
        debugStr = new StringBuilder();
        setVMS(false);
        setIBMCharset(false);
        setTerminalID("vt320");
        setBufferSize(100);
        //setBorder(2, false);
        gx = new char[4];
        reset();
        /* 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";
            // ConnectBot modifications.
            BackSpace[0] = "\b";
            BackSpace[1] = "\u007f";
            BackSpace[2] = "\u001b[3~";
            BackSpace[3] = "\u001b[2~";
        }

        /* 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] = ".";
    }

    public void setBackspace(int type) {
        switch (type) {
            case DELETE_IS_DEL:
                BackSpace[0] = "\u007f";
                BackSpace[1] = "\b";
                break;

            case DELETE_IS_BACKSPACE:
                BackSpace[0] = "\b";
                BackSpace[1] = "\u007f";
                break;
        }
    }

    /**
     * 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";
            PrevScn[0] = PrevScn[1] = PrevScn[2] = PrevScn[3] = "\u001b[I";
            NextScn[0] = NextScn[1] = NextScn[2] = NextScn[3] = "\u001b[G";
            // 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;
    }

    /**
     * A small conveniance method thar converts the string to a byte array
     * for sending.
     * @param s the string to be sent
     */
    private boolean write(String s, boolean doecho) {
        if (debug > 2) {
            debugStr.append("write(|")
            .append(s)
            .append("|,")
            .append(doecho);
            debug(debugStr.toString());
            debugStr.setLength(0);
        }

        if (s == null) // aka the empty string.
            return true;

        /* NOTE: getBytes() honours some locale, it *CONVERTS* the string.
         * However, we output only 7bit stuff towards the target, and *some*
         * 8 bit control codes. We must not mess up the latter, so we do hand
         * by hand copy.
         */
        byte arr[] = new byte[s.length()];

        for (int i = 0; i < s.length(); i++) {
            arr[i] = (byte) s.charAt(i);
        }

        write(arr);

        if (doecho)
            putString(s);

        return true;
    }

    private boolean write(int s, boolean doecho) {
        if (debug > 2) {
            debugStr.append("write(|")
            .append(s)
            .append("|,")
            .append(doecho);
            debug(debugStr.toString());
            debugStr.setLength(0);
        }

        write(s);

        // TODO check if character is wide
        if (doecho)
            putChar((char)s, false, false);

        return true;
    }

    private boolean write(String s) {
        return write(s, localecho);
    }

    // ===================================================================
    // the actual terminal emulation code comes here:
    // ===================================================================

    private String terminalID = "vt320";
    private String answerBack = "Use Terminal.answerback to set ...\n";

    // X - COLUMNS, Y - ROWS
    int R, C;
    int attributes = 0;

    int Sc, Sr, Sa, Stm, Sbm;
    char Sgr, Sgl;
    char Sgx[];

    int insertmode = 0;
    int statusmode = 0;
    boolean vt52mode = false;
    boolean keypadmode = false; /* false - numeric, true - application */
    boolean output8bit = false;
    int normalcursor = 0;
    boolean moveoutsidemargins = true;
    boolean wraparound = true;
    boolean sendcrlf = true;
    boolean capslock = false;
    boolean numlock = false;
    int mouserpt = 0;
    byte mousebut = 0;

    boolean useibmcharset = false;

    int lastwaslf = 0;
    boolean usedcharsets = false;

    private final static char ESC = 27;
    private final static char IND = 132;
    private final static char NEL = 133;
    private final static char RI = 141;
    private final static char SS2 = 142;
    private final static char SS3 = 143;
    private final static char DCS = 144;
    private final static char HTS = 136;
    private final static char CSI = 155;
    private final static char OSC = 157;
    private final static int TSTATE_DATA = 0;
    private final static int TSTATE_ESC = 1; /* ESC */
    private final static int TSTATE_CSI = 2; /* ESC [ */
    private final static int TSTATE_DCS = 3; /* ESC P */
    private final static int TSTATE_DCEQ = 4; /* ESC [? */
    private final static int TSTATE_ESCSQUARE = 5; /* ESC # */
    private final static int TSTATE_OSC = 6;       /* ESC ] */
    private final static int TSTATE_SETG0 = 7;     /* ESC (? */
    private final static int TSTATE_SETG1 = 8;     /* ESC )? */
    private final static int TSTATE_SETG2 = 9;     /* ESC *? */
    private final static int TSTATE_SETG3 = 10;    /* ESC +? */
    private final static int TSTATE_CSI_DOLLAR = 11; /* ESC [ Pn $ */
    private final static int TSTATE_CSI_EX = 12; /* ESC [ ! */
    private final static int TSTATE_ESCSPACE = 13; /* ESC <space> */
    private final static int TSTATE_VT52X = 14;
    private final static int TSTATE_VT52Y = 15;
    private final static int TSTATE_CSI_TICKS = 16;
    private final static int TSTATE_CSI_EQUAL = 17; /* ESC [ = */
    private final static int TSTATE_TITLE = 18; /* xterm title */

    /* Keys we support */
    public final static int KEY_PAUSE      = 1;
    public final static int KEY_F1         = 2;
    public final static int KEY_F2         = 3;
    public final static int KEY_F3         = 4;
    public final static int KEY_F4         = 5;
    public final static int KEY_F5         = 6;
    public final static int KEY_F6         = 7;
    public final static int KEY_F7         = 8;
    public final static int KEY_F8         = 9;
    public final static int KEY_F9         = 10;
    public final static int KEY_F10        = 11;
    public final static int KEY_F11        = 12;
    public final static int KEY_F12        = 13;
    public final static int KEY_F13        = 14;    // only used by tn5250
    public final static int KEY_F14        = 15;    // only used by tn5250
    public final static int KEY_F15        = 16;    // only used by tn5250
    public final static int KEY_F16        = 17;    // only used by tn5250
    public final static int KEY_F17        = 18;    // only used by tn5250
    public final static int KEY_F18        = 19;    // only used by tn5250
    public final static int KEY_F19        = 20;    // only used by tn5250
    public final static int KEY_F20        = 21;    // only used by tn5250
    public final static int KEY_F21        = 22;    // only used by tn5250
    public final static int KEY_F22        = 23;    // only used by tn5250
    public final static int KEY_F23        = 24;    // only used by tn5250
    public final static int KEY_F24        = 25;    // only used by tn5250
    public final static int KEY_UP         = 26;
    public final static int KEY_DOWN       = 27;
    public final static int KEY_LEFT       = 28;
    public final static int KEY_RIGHT      = 29;
    public final static int KEY_PAGE_DOWN  = 30;
    public final static int KEY_PAGE_UP    = 31;
    public final static int KEY_INSERT     = 32;
    public final static int KEY_DELETE     = 33;
    public final static int KEY_BACK_SPACE = 34;
    public final static int KEY_HOME       = 35;
    public final static int KEY_END        = 36;
    public final static int KEY_NUM_LOCK   = 37;
    public final static int KEY_CAPS_LOCK  = 38;
    public final static int KEY_SHIFT      = 39;
    public final static int KEY_CONTROL    = 40;
    public final static int KEY_ALT        = 41;
    public final static int KEY_ENTER      = 42;
    public final static int KEY_NUMPAD0    = 43;
    public final static int KEY_NUMPAD1    = 44;
    public final static int KEY_NUMPAD2    = 45;
    public final static int KEY_NUMPAD3    = 46;
    public final static int KEY_NUMPAD4    = 47;
    public final static int KEY_NUMPAD5    = 48;
    public final static int KEY_NUMPAD6    = 49;
    public final static int KEY_NUMPAD7    = 50;
    public final static int KEY_NUMPAD8    = 51;
    public final static int KEY_NUMPAD9    = 52;
    public final static int KEY_DECIMAL    = 53;
    public final static int KEY_ADD        = 54;
    public final static int KEY_ESCAPE     = 55;
    public final static int KEY_TAB        = 56;
    public final static int KEY_SYSREQ     = 57;    // only used by tn5250

    public final static int DELETE_IS_DEL = 0;
    public final static int DELETE_IS_BACKSPACE = 1;

    /* The graphics charsets
     * B - default ASCII
     * A - ISO Latin 1
     * 0 - DEC SPECIAL
     * < - User defined
     * ....
     */
    char gx[];
    char gl;      // GL (left charset)
    char gr;      // GR (right charset)
    int onegl;    // single shift override for GL.

    // Map from scoansi linedrawing to DEC _and_ unicode (for the stuff which
    // is not in linedrawing). Got from experimenting with scoadmin.
    private final static String scoansi_acs = "Tm7k3x4u?kZl@mYjEnB\u2566DqCtAvM\u2550:\u2551N\u2557I\u2554;\u2557H\u255a0a<\u255d";
    // array to store DEC Special -> Unicode mapping
    //  Unicode   DEC  Unicode name    (DEC name)
    private static char DECSPECIAL[] = {
        '\u0040', //5f blank
        '\u2666', //60 black diamond
        '\u2592', //61 grey square
        '\u2409', //62 Horizontal tab  (ht) pict. for control
        '\u240c', //63 Form Feed       (ff) pict. for control
        '\u240d', //64 Carriage Return (cr) pict. for control
        '\u240a', //65 Line Feed       (lf) pict. for control
        '\u00ba', //66 Masculine ordinal indicator
        '\u00b1', //67 Plus or minus sign
        '\u2424', //68 New Line        (nl) pict. for control
        '\u240b', //69 Vertical Tab    (vt) pict. for control
        '\u2518', //6a Forms light up   and left
        '\u2510', //6b Forms light down and left
        '\u250c', //6c Forms light down and right
        '\u2514', //6d Forms light up   and right
        '\u253c', //6e Forms light vertical and horizontal
        '\u2594', //6f Upper 1/8 block                        (Scan 1)
        '\u2580', //70 Upper 1/2 block                        (Scan 3)
        '\u2500', //71 Forms light horizontal or ?em dash?    (Scan 5)
        '\u25ac', //72 \u25ac black rect. or \u2582 lower 1/4 (Scan 7)
        '\u005f', //73 \u005f underscore  or \u2581 lower 1/8 (Scan 9)
        '\u251c', //74 Forms light vertical and right
        '\u2524', //75 Forms light vertical and left
        '\u2534', //76 Forms light up   and horizontal
        '\u252c', //77 Forms light down and horizontal
        '\u2502', //78 vertical bar
        '\u2264', //79 less than or equal
        '\u2265', //7a greater than or equal
        '\u00b6', //7b paragraph
        '\u2260', //7c not equal
        '\u00a3', //7d Pound Sign (british)
        '\u00b7'  //7e Middle Dot
    };

    /** Strings to send on function key pressing */
    private String Numpad[];
    private String FunctionKey[];
    private String FunctionKeyShift[];
    private String FunctionKeyCtrl[];
    private String FunctionKeyAlt[];
    private String TabKey[];
    private String KeyUp[], KeyDown[], KeyLeft[], KeyRight[];
    private String KPMinus, KPComma, KPPeriod, KPEnter;
    private String PF1, PF2, PF3, PF4;
    private String Help, Do, Find, Select;

    private String KeyHome[], KeyEnd[], Insert[], Remove[], PrevScn[], NextScn[];
    private String Escape[], BackSpace[], NUMDot[], NUMPlus[];

    private String osc, dcs; /* to memorize OSC & DCS control sequence */

    /** vt320 state variable (internal) */
    private int term_state = TSTATE_DATA;
    /** in vms mode, set by Terminal.VMS property */
    private boolean vms = false;
    /** Tabulators */
    private byte[] Tabs;
    /** The list of integers as used by CSI */
    private int[] DCEvars = new int[30];
    private int DCEvar;

    /**
     * Replace escape code characters (backslash + identifier) with their
     * respective codes.
     * @param tmp the string to be parsed
     * @return a unescaped string
     */
    static String unEscape(String tmp) {
        int idx = 0, oldidx = 0;
        String cmd;
        // f.println("unescape("+tmp+")");
        cmd = "";

        while ((idx = tmp.indexOf('\\', oldidx)) >= 0 &&
                ++idx <= tmp.length()) {
            cmd += tmp.substring(oldidx, idx - 1);

            if (idx == tmp.length()) return cmd;

            switch (tmp.charAt(idx)) {
                case 'b':
                    cmd += "\b";
                    break;

                case 'e':
                    cmd += "\u001b";
                    break;

                case 'n':
                    cmd += "\n";
                    break;

                case 'r':
                    cmd += "\r";
                    break;

                case 't':
                    cmd += "\t";
                    break;

                case 'v':
                    cmd += "\u000b";
                    break;

                case 'a':
                    cmd += "\u0012";
                    break;

                default :
                    if ((tmp.charAt(idx) >= '0') && (tmp.charAt(idx) <= '9')) {
                        int i;

                        for (i = idx; i < tmp.length(); i++)
                            if ((tmp.charAt(i) < '0') || (tmp.charAt(i) > '9'))
                                break;

                        cmd += (char) Integer.parseInt(tmp.substring(idx, i));
                        idx = i - 1;
                    }
                    else
                        cmd += tmp.substring(idx, ++idx);

                    break;
            }

            oldidx = ++idx;
        }

        if (oldidx <= tmp.length()) cmd += tmp.substring(oldidx);

        return cmd;
    }

    /**
     * A small conveniance method thar converts a 7bit string to the 8bit
     * version depending on VT52/Output8Bit mode.
     *
     * @param s the string to be sent
     */
    private boolean writeSpecial(String s) {
        if (s == null)
            return true;

        if (((s.length() >= 3) && (s.charAt(0) == 27) && (s.charAt(1) == 'O'))) {
            if (vt52mode) {
                if ((s.charAt(2) >= 'P') && (s.charAt(2) <= 'S')) {
                    s = "\u001b" + s.substring(2);  /* ESC x */
                }
                else {
                    s = "\u001b?" + s.substring(2);  /* ESC ? x */
                }
            }
            else {
                if (output8bit) {
                    s = "\u008f" + s.substring(2);  /* SS3 x */
                } /* else keep string as it is */
            }
        }

        if (((s.length() >= 3) && (s.charAt(0) == 27) && (s.charAt(1) == '['))) {
            if (output8bit) {
                s = "\u009b" + s.substring(2);  /* CSI ... */
            } /* else keep */
        }

        return write(s, false);
    }

    /**
     * main keytyping event handler for all the special function and modifier keys
     * the normal keys are processed by write(byte b);
     */
    public void keyPressed(int keyCode, char keyChar, int modifiers) {
        boolean control = (modifiers & VDUInput.KEY_CONTROL) != 0;
        boolean shift = (modifiers & VDUInput.KEY_SHIFT) != 0;
        boolean alt = (modifiers & VDUInput.KEY_ALT) != 0;

        if (debug > 1) {
            debugStr.append("keyPressed(")
            .append(keyCode)
            .append(", ")
            .append((int)keyChar)
            .append(", ")
            .append(modifiers)
            .append(')');
            debug(debugStr.toString());
            debugStr.setLength(0);
        }

        int xind;
        String fmap[];
        xind = 0;
        fmap = FunctionKey;

        if (shift) {
            fmap = FunctionKeyShift;
            xind = 1;
        }

        if (control) {
            fmap = FunctionKeyCtrl;
            xind = 2;
        }

        if (alt) {
            fmap = FunctionKeyAlt;
            xind = 3;
        }

        switch (keyCode) {
            case KEY_PAUSE:
                if (shift || control)
                    sendTelnetCommand((byte) 243);  // BREAK

                break;

            case KEY_F1:
                writeSpecial(fmap[1]);
                break;

            case KEY_F2:
                writeSpecial(fmap[2]);
                break;

            case KEY_F3:
                writeSpecial(fmap[3]);
                break;

            case KEY_F4:
                writeSpecial(fmap[4]);
                break;

            case KEY_F5:
                writeSpecial(fmap[5]);
                break;

            case KEY_F6:
                writeSpecial(fmap[6]);
                break;

            case KEY_F7:
                writeSpecial(fmap[7]);
                break;

            case KEY_F8:
                writeSpecial(fmap[8]);
                break;

            case KEY_F9:
                writeSpecial(fmap[9]);
                break;

            case KEY_F10:
                writeSpecial(fmap[10]);
                break;

            case KEY_F11:
                writeSpecial(fmap[11]);
                break;

            case KEY_F12:
                writeSpecial(fmap[12]);
                break;

            case KEY_F13:
            case KEY_F14:
            case KEY_F15:
            case KEY_F16:
            case KEY_F17:
            case KEY_F18:
            case KEY_F19:
            case KEY_F20:
            case KEY_F21:
            case KEY_F22:
            case KEY_F23:
            case KEY_F24:
                break;

            case KEY_UP:
                writeSpecial(KeyUp[xind]);
                break;

            case KEY_DOWN:
                writeSpecial(KeyDown[xind]);
                break;

            case KEY_LEFT:
                writeSpecial(KeyLeft[xind]);
                break;

            case KEY_RIGHT:
                writeSpecial(KeyRight[xind]);
                break;

            case KEY_PAGE_DOWN:
                writeSpecial(NextScn[xind]);
                break;

            case KEY_PAGE_UP:
                writeSpecial(PrevScn[xind]);
                break;

            case KEY_INSERT:
                writeSpecial(Insert[xind]);
                break;

            case KEY_DELETE:
                writeSpecial(Remove[xind]);
                break;

            case KEY_BACK_SPACE:
                writeSpecial(BackSpace[xind]);

                if (localecho) {
                    if (BackSpace[xind] == "\b") {
                        putString("\b \b");  // make the last char 'deleted'
                    }
                    else {
                        putString(BackSpace[xind]);  // echo it
                    }
                }

                break;

            case KEY_HOME:
                writeSpecial(KeyHome[xind]);
                break;

            case KEY_END:
                writeSpecial(KeyEnd[xind]);
                break;

            case KEY_NUM_LOCK:
                if (vms && control) {
                    writeSpecial(PF1);
                }

                if (!control)
                    numlock = !numlock;

                break;

            case KEY_CAPS_LOCK:
                capslock = !capslock;
                break;

            case KEY_SHIFT:
            case KEY_CONTROL:
            case KEY_ALT:
                break;

            case KEY_ESCAPE:
                writeSpecial(Escape[xind]);
                break;

            case KEY_ENTER:
                write(0x0d);
                break;

            case KEY_TAB:
                writeSpecial(TabKey[xind]);
                break;

            default:
                break;
        }
    }

    private void handle_dcs(String dcs) {
        debugStr.append("DCS: ")
        .append(dcs);
        debug(debugStr.toString());
        debugStr.setLength(0);
    }

    private void handle_osc(String osc) {
        if (osc.length() > 2 && osc.substring(0, 2).equals("4;")) {
            // Define color palette
            String[] colorData = osc.split(";");

            try {
                int colorIndex = Integer.parseInt(colorData[1]);

                if ("rgb:".equals(colorData[2].substring(0, 4))) {
                    String[] rgb = colorData[2].substring(4).split("/");
                    int red = Integer.parseInt(rgb[0].substring(0, 2), 16) & 0xFF;
                    int green = Integer.parseInt(rgb[1].substring(0, 2), 16) & 0xFF;
                    int blue = Integer.parseInt(rgb[2].substring(0, 2), 16) & 0xFF;
                    display.setColor(colorIndex, red, green, blue);
                }
            }
            catch (Exception e) {
                debugStr.append("OSC: invalid color sequence encountered: ")
                .append(osc);
                debug(debugStr.toString());
                debugStr.setLength(0);
            }
        }
        else
            debug("OSC: " + osc);
    }

    private final static char unimap[] = {
        //#
        //#    Name:     cp437_DOSLatinUS to Unicode table
        //#    Unicode version: 1.1
        //#    Table version: 1.1
        //#    Table format:  Format A
        //#    Date:          03/31/95
        //#    Authors:       Michel Suignard <michelsu@microsoft.com>
        //#                   Lori Hoerth <lorih@microsoft.com>
        //#    General notes: none
        //#
        //#    Format: Three tab-separated columns
        //#        Column #1 is the cp1255_WinHebrew code (in hex)
        //#        Column #2 is the Unicode (in hex as 0xXXXX)
        //#        Column #3 is the Unicode name (follows a comment sign, '#')
        //#
        //#    The entries are in cp437_DOSLatinUS order
        //#

        0x0000, // #NULL
        0x0001, // #START OF HEADING
        0x0002, // #START OF TEXT
        0x0003, // #END OF TEXT
        0x0004, // #END OF TRANSMISSION
        0x0005, // #ENQUIRY
        0x0006, // #ACKNOWLEDGE
        0x0007, // #BELL
        0x0008, // #BACKSPACE
        0x0009, // #HORIZONTAL TABULATION
        0x000a, // #LINE FEED
        0x000b, // #VERTICAL TABULATION
        0x000c, // #FORM FEED
        0x000d, // #CARRIAGE RETURN
        0x000e, // #SHIFT OUT
        0x000f, // #SHIFT IN
        0x0010, // #DATA LINK ESCAPE
        0x0011, // #DEVICE CONTROL ONE
        0x0012, // #DEVICE CONTROL TWO
        0x0013, // #DEVICE CONTROL THREE
        0x0014, // #DEVICE CONTROL FOUR
        0x0015, // #NEGATIVE ACKNOWLEDGE
        0x0016, // #SYNCHRONOUS IDLE
        0x0017, // #END OF TRANSMISSION BLOCK
        0x0018, // #CANCEL
        0x0019, // #END OF MEDIUM
        0x001a, // #SUBSTITUTE
        0x001b, // #ESCAPE
        0x001c, // #FILE SEPARATOR
        0x001d, // #GROUP SEPARATOR
        0x001e, // #RECORD SEPARATOR
        0x001f, // #UNIT SEPARATOR
        0x0020, // #SPACE
        0x0021, // #EXCLAMATION MARK
        0x0022, // #QUOTATION MARK
        0x0023, // #NUMBER SIGN
        0x0024, // #DOLLAR SIGN
        0x0025, // #PERCENT SIGN
        0x0026, // #AMPERSAND
        0x0027, // #APOSTROPHE
        0x0028, // #LEFT PARENTHESIS
        0x0029, // #RIGHT PARENTHESIS
        0x002a, // #ASTERISK
        0x002b, // #PLUS SIGN
        0x002c, // #COMMA
        0x002d, // #HYPHEN-MINUS
        0x002e, // #FULL STOP
        0x002f, // #SOLIDUS
        0x0030, // #DIGIT ZERO
        0x0031, // #DIGIT ONE
        0x0032, // #DIGIT TWO
        0x0033, // #DIGIT THREE
        0x0034, // #DIGIT FOUR
        0x0035, // #DIGIT FIVE
        0x0036, // #DIGIT SIX
        0x0037, // #DIGIT SEVEN
        0x0038, // #DIGIT EIGHT
        0x0039, // #DIGIT NINE
        0x003a, // #COLON
        0x003b, // #SEMICOLON
        0x003c, // #LESS-THAN SIGN
        0x003d, // #EQUALS SIGN
        0x003e, // #GREATER-THAN SIGN
        0x003f, // #QUESTION MARK
        0x0040, // #COMMERCIAL AT
        0x0041, // #LATIN CAPITAL LETTER A
        0x0042, // #LATIN CAPITAL LETTER B
        0x0043, // #LATIN CAPITAL LETTER C
        0x0044, // #LATIN CAPITAL LETTER D
        0x0045, // #LATIN CAPITAL LETTER E
        0x0046, // #LATIN CAPITAL LETTER F
        0x0047, // #LATIN CAPITAL LETTER G
        0x0048, // #LATIN CAPITAL LETTER H
        0x0049, // #LATIN CAPITAL LETTER I
        0x004a, // #LATIN CAPITAL LETTER J
        0x004b, // #LATIN CAPITAL LETTER K
        0x004c, // #LATIN CAPITAL LETTER L
        0x004d, // #LATIN CAPITAL LETTER M
        0x004e, // #LATIN CAPITAL LETTER N
        0x004f, // #LATIN CAPITAL LETTER O
        0x0050, // #LATIN CAPITAL LETTER P
        0x0051, // #LATIN CAPITAL LETTER Q
        0x0052, // #LATIN CAPITAL LETTER R
        0x0053, // #LATIN CAPITAL LETTER S
        0x0054, // #LATIN CAPITAL LETTER T
        0x0055, // #LATIN CAPITAL LETTER U
        0x0056, // #LATIN CAPITAL LETTER V
        0x0057, // #LATIN CAPITAL LETTER W
        0x0058, // #LATIN CAPITAL LETTER X
        0x0059, // #LATIN CAPITAL LETTER Y
        0x005a, // #LATIN CAPITAL LETTER Z
        0x005b, // #LEFT SQUARE BRACKET
        0x005c, // #REVERSE SOLIDUS
        0x005d, // #RIGHT SQUARE BRACKET
        0x005e, // #CIRCUMFLEX ACCENT
        0x005f, // #LOW LINE
        0x0060, // #GRAVE ACCENT
        0x0061, // #LATIN SMALL LETTER A
        0x0062, // #LATIN SMALL LETTER B
        0x0063, // #LATIN SMALL LETTER C
        0x0064, // #LATIN SMALL LETTER D
        0x0065, // #LATIN SMALL LETTER E
        0x0066, // #LATIN SMALL LETTER F
        0x0067, // #LATIN SMALL LETTER G
        0x0068, // #LATIN SMALL LETTER H
        0x0069, // #LATIN SMALL LETTER I
        0x006a, // #LATIN SMALL LETTER J
        0x006b, // #LATIN SMALL LETTER K
        0x006c, // #LATIN SMALL LETTER L
        0x006d, // #LATIN SMALL LETTER M
        0x006e, // #LATIN SMALL LETTER N
        0x006f, // #LATIN SMALL LETTER O
        0x0070, // #LATIN SMALL LETTER P
        0x0071, // #LATIN SMALL LETTER Q
        0x0072, // #LATIN SMALL LETTER R
        0x0073, // #LATIN SMALL LETTER S
        0x0074, // #LATIN SMALL LETTER T
        0x0075, // #LATIN SMALL LETTER U
        0x0076, // #LATIN SMALL LETTER V
        0x0077, // #LATIN SMALL LETTER W
        0x0078, // #LATIN SMALL LETTER X
        0x0079, // #LATIN SMALL LETTER Y
        0x007a, // #LATIN SMALL LETTER Z
        0x007b, // #LEFT CURLY BRACKET
        0x007c, // #VERTICAL LINE
        0x007d, // #RIGHT CURLY BRACKET
        0x007e, // #TILDE
        0x007f, // #DELETE
        0x00c7, // #LATIN CAPITAL LETTER C WITH CEDILLA
        0x00fc, // #LATIN SMALL LETTER U WITH DIAERESIS
        0x00e9, // #LATIN SMALL LETTER E WITH ACUTE
        0x00e2, // #LATIN SMALL LETTER A WITH CIRCUMFLEX
        0x00e4, // #LATIN SMALL LETTER A WITH DIAERESIS
        0x00e0, // #LATIN SMALL LETTER A WITH GRAVE
        0x00e5, // #LATIN SMALL LETTER A WITH RING ABOVE
        0x00e7, // #LATIN SMALL LETTER C WITH CEDILLA
        0x00ea, // #LATIN SMALL LETTER E WITH CIRCUMFLEX
        0x00eb, // #LATIN SMALL LETTER E WITH DIAERESIS
        0x00e8, // #LATIN SMALL LETTER E WITH GRAVE
        0x00ef, // #LATIN SMALL LETTER I WITH DIAERESIS
        0x00ee, // #LATIN SMALL LETTER I WITH CIRCUMFLEX
        0x00ec, // #LATIN SMALL LETTER I WITH GRAVE
        0x00c4, // #LATIN CAPITAL LETTER A WITH DIAERESIS
        0x00c5, // #LATIN CAPITAL LETTER A WITH RING ABOVE
        0x00c9, // #LATIN CAPITAL LETTER E WITH ACUTE
        0x00e6, // #LATIN SMALL LIGATURE AE
        0x00c6, // #LATIN CAPITAL LIGATURE AE
        0x00f4, // #LATIN SMALL LETTER O WITH CIRCUMFLEX
        0x00f6, // #LATIN SMALL LETTER O WITH DIAERESIS
        0x00f2, // #LATIN SMALL LETTER O WITH GRAVE
        0x00fb, // #LATIN SMALL LETTER U WITH CIRCUMFLEX
        0x00f9, // #LATIN SMALL LETTER U WITH GRAVE
        0x00ff, // #LATIN SMALL LETTER Y WITH DIAERESIS
        0x00d6, // #LATIN CAPITAL LETTER O WITH DIAERESIS
        0x00dc, // #LATIN CAPITAL LETTER U WITH DIAERESIS
        0x00a2, // #CENT SIGN
        0x00a3, // #POUND SIGN
        0x00a5, // #YEN SIGN
        0x20a7, // #PESETA SIGN
        0x0192, // #LATIN SMALL LETTER F WITH HOOK
        0x00e1, // #LATIN SMALL LETTER A WITH ACUTE
        0x00ed, // #LATIN SMALL LETTER I WITH ACUTE
        0x00f3, // #LATIN SMALL LETTER O WITH ACUTE
        0x00fa, // #LATIN SMALL LETTER U WITH ACUTE
        0x00f1, // #LATIN SMALL LETTER N WITH TILDE
        0x00d1, // #LATIN CAPITAL LETTER N WITH TILDE
        0x00aa, // #FEMININE ORDINAL INDICATOR
        0x00ba, // #MASCULINE ORDINAL INDICATOR
        0x00bf, // #INVERTED QUESTION MARK
        0x2310, // #REVERSED NOT SIGN
        0x00ac, // #NOT SIGN
        0x00bd, // #VULGAR FRACTION ONE HALF
        0x00bc, // #VULGAR FRACTION ONE QUARTER
        0x00a1, // #INVERTED EXCLAMATION MARK
        0x00ab, // #LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
        0x00bb, // #RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
        0x2591, // #LIGHT SHADE
        0x2592, // #MEDIUM SHADE
        0x2593, // #DARK SHADE
        0x2502, // #BOX DRAWINGS LIGHT VERTICAL
        0x2524, // #BOX DRAWINGS LIGHT VERTICAL AND LEFT
        0x2561, // #BOX DRAWINGS VERTICAL SINGLE AND LEFT DOUBLE
        0x2562, // #BOX DRAWINGS VERTICAL DOUBLE AND LEFT SINGLE
        0x2556, // #BOX DRAWINGS DOWN DOUBLE AND LEFT SINGLE
        0x2555, // #BOX DRAWINGS DOWN SINGLE AND LEFT DOUBLE
        0x2563, // #BOX DRAWINGS DOUBLE VERTICAL AND LEFT
        0x2551, // #BOX DRAWINGS DOUBLE VERTICAL
        0x2557, // #BOX DRAWINGS DOUBLE DOWN AND LEFT
        0x255d, // #BOX DRAWINGS DOUBLE UP AND LEFT
        0x255c, // #BOX DRAWINGS UP DOUBLE AND LEFT SINGLE
        0x255b, // #BOX DRAWINGS UP SINGLE AND LEFT DOUBLE
        0x2510, // #BOX DRAWINGS LIGHT DOWN AND LEFT
        0x2514, // #BOX DRAWINGS LIGHT UP AND RIGHT
        0x2534, // #BOX DRAWINGS LIGHT UP AND HORIZONTAL
        0x252c, // #BOX DRAWINGS LIGHT DOWN AND HORIZONTAL
        0x251c, // #BOX DRAWINGS LIGHT VERTICAL AND RIGHT
        0x2500, // #BOX DRAWINGS LIGHT HORIZONTAL
        0x253c, // #BOX DRAWINGS LIGHT VERTICAL AND HORIZONTAL
        0x255e, // #BOX DRAWINGS VERTICAL SINGLE AND RIGHT DOUBLE
        0x255f, // #BOX DRAWINGS VERTICAL DOUBLE AND RIGHT SINGLE
        0x255a, // #BOX DRAWINGS DOUBLE UP AND RIGHT
        0x2554, // #BOX DRAWINGS DOUBLE DOWN AND RIGHT
        0x2569, // #BOX DRAWINGS DOUBLE UP AND HORIZONTAL
        0x2566, // #BOX DRAWINGS DOUBLE DOWN AND HORIZONTAL
        0x2560, // #BOX DRAWINGS DOUBLE VERTICAL AND RIGHT
        0x2550, // #BOX DRAWINGS DOUBLE HORIZONTAL
        0x256c, // #BOX DRAWINGS DOUBLE VERTICAL AND HORIZONTAL
        0x2567, // #BOX DRAWINGS UP SINGLE AND HORIZONTAL DOUBLE
        0x2568, // #BOX DRAWINGS UP DOUBLE AND HORIZONTAL SINGLE
        0x2564, // #BOX DRAWINGS DOWN SINGLE AND HORIZONTAL DOUBLE
        0x2565, // #BOX DRAWINGS DOWN DOUBLE AND HORIZONTAL SINGLE
        0x2559, // #BOX DRAWINGS UP DOUBLE AND RIGHT SINGLE
        0x2558, // #BOX DRAWINGS UP SINGLE AND RIGHT DOUBLE
        0x2552, // #BOX DRAWINGS DOWN SINGLE AND RIGHT DOUBLE
        0x2553, // #BOX DRAWINGS DOWN DOUBLE AND RIGHT SINGLE
        0x256b, // #BOX DRAWINGS VERTICAL DOUBLE AND HORIZONTAL SINGLE
        0x256a, // #BOX DRAWINGS VERTICAL SINGLE AND HORIZONTAL DOUBLE
        0x2518, // #BOX DRAWINGS LIGHT UP AND LEFT
        0x250c, // #BOX DRAWINGS LIGHT DOWN AND RIGHT
        0x2588, // #FULL BLOCK
        0x2584, // #LOWER HALF BLOCK
        0x258c, // #LEFT HALF BLOCK
        0x2590, // #RIGHT HALF BLOCK
        0x2580, // #UPPER HALF BLOCK
        0x03b1, // #GREEK SMALL LETTER ALPHA
        0x00df, // #LATIN SMALL LETTER SHARP S
        0x0393, // #GREEK CAPITAL LETTER GAMMA
        0x03c0, // #GREEK SMALL LETTER PI
        0x03a3, // #GREEK CAPITAL LETTER SIGMA
        0x03c3, // #GREEK SMALL LETTER SIGMA
        0x00b5, // #MICRO SIGN
        0x03c4, // #GREEK SMALL LETTER TAU
        0x03a6, // #GREEK CAPITAL LETTER PHI
        0x0398, // #GREEK CAPITAL LETTER THETA
        0x03a9, // #GREEK CAPITAL LETTER OMEGA
        0x03b4, // #GREEK SMALL LETTER DELTA
        0x221e, // #INFINITY
        0x03c6, // #GREEK SMALL LETTER PHI
        0x03b5, // #GREEK SMALL LETTER EPSILON
        0x2229, // #INTERSECTION
        0x2261, // #IDENTICAL TO
        0x00b1, // #PLUS-MINUS SIGN
        0x2265, // #GREATER-THAN OR EQUAL TO
        0x2264, // #LESS-THAN OR EQUAL TO
        0x2320, // #TOP HALF INTEGRAL
        0x2321, // #BOTTOM HALF INTEGRAL
        0x00f7, // #DIVISION SIGN
        0x2248, // #ALMOST EQUAL TO
        0x00b0, // #DEGREE SIGN
        0x2219, // #BULLET OPERATOR
        0x00b7, // #MIDDLE DOT
        0x221a, // #SQUARE ROOT
        0x207f, // #SUPERSCRIPT LATIN SMALL LETTER N
        0x00b2, // #SUPERSCRIPT TWO
        0x25a0, // #BLACK SQUARE
        0x00a0, // #NO-BREAK SPACE
    };

    public char map_cp850_unicode(char x) {
        if (x >= 0x100)
            return x;

        return unimap[x];
    }

    private void _SetCursor(int row, int col) {
        int maxr = height - 1;
        int tm = getTopMargin();
        R = (row < 0) ? 0 : row;
        C = (col < 0) ? 0 : (col >= width) ? width - 1 : col;

        if (!moveoutsidemargins) {
            R += tm;
            maxr = getBottomMargin();
        }

        if (R > maxr) R = maxr;
    }

    private void putChar(char c, boolean isWide, boolean doshowcursor) {
        int rows = this.height; //statusline
        int columns = this.width;

        // byte msg[];
//    if (debug > 4) {
//      debugStr.append("putChar(")
//        .append(c)
//        .append(" [")
//        .append((int) c)
//        .append("]) at R=")
//        .append(R)
//        .append(" , C=")
//        .append(C)
//        .append(", columns=")
//        .append(columns)
//        .append(", rows=")
//        .append(rows);
//      debug(debugStr.toString());
//      debugStr.setLength(0);
//    }
//    markLine(R, 1);
//    if (c > 255) {
//      if (debug > 0)
//        debug("char > 255:" + (int) c);
//      //return;
//    }
        switch (term_state) {
            case TSTATE_DATA:

                /* FIXME: we shouldn't use chars with bit 8 set if ibmcharset.
                 * probably... but some BBS do anyway...
                 */
                if (!useibmcharset) {
                    boolean doneflag = true;

                    switch (c) {
                        case OSC:
                            osc = "";
                            term_state = TSTATE_OSC;
                            break;

                        case RI:
                            if (R > getTopMargin())
                                R--;
                            else
                                insertLine(R, 1, SCROLL_DOWN);

                            if (debug > 1)
                                debug("RI");

                            break;

                        case IND:
                            if (debug > 2) {
                                debugStr.append("IND at ")
                                .append(R)
                                .append(", tm is ")
                                .append(getTopMargin())
                                .append(", bm is ")
                                .append(getBottomMargin());
                                debug(debugStr.toString());
                                debugStr.setLength(0);
                            }

                            if (R == getBottomMargin() || R == rows - 1)
                                insertLine(R, 1, SCROLL_UP);
                            else
                                R++;

                            if (debug > 1)
                                debug("IND (at " + R + " )");

                            break;

                        case NEL:
                            if (R == getBottomMargin() || R == rows - 1)
                                insertLine(R, 1, SCROLL_UP);
                            else
                                R++;

                            C = 0;

                            if (debug > 1)
                                debug("NEL (at " + R + " )");

                            break;

                        case HTS:
                            Tabs[C] = 1;

                            if (debug > 1)
                                debug("HTS");

                            break;

                        case DCS:
                            dcs = "";
                            term_state = TSTATE_DCS;
                            break;

                        default:
                            doneflag = false;
                            break;
                    }

                    if (doneflag) break;
                }

                switch (c) {
                    case SS3:
                        onegl = 3;
                        break;

                    case SS2:
                        onegl = 2;
                        break;

                    case CSI: // should be in the 8bit section, but some BBS use this
                        DCEvar = 0;
                        DCEvars[0] = 0;
                        DCEvars[1] = 0;
                        DCEvars[2] = 0;
                        DCEvars[3] = 0;
                        term_state = TSTATE_CSI;
                        break;

                    case ESC:
                        term_state = TSTATE_ESC;
                        lastwaslf = 0;
                        break;

                    case 5: /* ENQ */
                        write(answerBack, false);
                        break;

                    case 12:
                        /* FormFeed, Home for the BBS world */
                        deleteArea(0, 0, columns, rows, attributes);
                        C = R = 0;
                        break;

                    case '\b': /* 8 */
                        C--;

                        if (C < 0)
                            C = 0;

                        lastwaslf = 0;
                        break;

                    case '\t':
                        do {
                            // Don't overwrite or insert! TABS are not destructive, but movement!
                            C++;
                        }
                        while (C < columns && (Tabs[C] == 0));

                        lastwaslf = 0;
                        break;

                    case '\r': // 13 CR
                        C = 0;
                        break;

                    case '\n': // 10 LF
                        if (debug > 3)
                            debug("R= " + R + ", bm " + getBottomMargin() + ", tm=" + getTopMargin() + ", rows=" + rows);

                        if (!vms) {
                            if (lastwaslf != 0 && lastwaslf != c)   //  Ray: I do not understand this logic.
                                break;

                            lastwaslf = c;
                            /*C = 0;*/
                        }

                        if (R == getBottomMargin() || R >= rows - 1)
                            insertLine(R, 1, SCROLL_UP);
                        else
                            R++;

                        break;

                    case 7:
                        beep();
                        break;

                    case '\016': /* SMACS , as */
                        /* ^N, Shift out - Put G1 into GL */
                        gl = 1;
                        usedcharsets = true;
                        break;

                    case '\017': /* RMACS , ae */
                        /* ^O, Shift in - Put G0 into GL */
                        gl = 0;
                        usedcharsets = true;
                        break;

                    default: {
                            int thisgl = gl;

                            if (onegl >= 0) {
                                thisgl = onegl;
                                onegl = -1;
                            }

                            lastwaslf = 0;

                            if (c < 32) {
                                if (c != 0)
                                    if (debug > 0)
                                        debug("TSTATE_DATA char: " + ((int) c));

                                /*break; some BBS really want those characters, like hearst etc. */
                                if (c == 0) /* print 0 ... you bet */
                                    break;
                            }

                            if (C >= columns) {
                                if (wraparound) {
                                    int bot = rows;

                                    // If we're in the scroll region, check against the bottom margin
                                    if (R <= getBottomMargin() && R >= getTopMargin())
                                        bot = getBottomMargin() + 1;

                                    if (R < bot - 1)
                                        R++;
                                    else {
                                        if (debug > 3) debug("scrolling due to wrap at " + R);

                                        insertLine(R, 1, SCROLL_UP);
                                    }

                                    C = 0;
                                }
                                else {
                                    // cursor stays on last character.
                                    C = columns - 1;
                                }
                            }

                            boolean mapped = false;

                            // Mapping if DEC Special is chosen charset
                            if (usedcharsets) {
                                if (c >= '\u0020' && c <= '\u007f') {
                                    switch (gx[thisgl]) {
                                        case '0':

                                            // Remap SCOANSI line drawing to VT100 line drawing chars
                                            // for our SCO using customers.
                                            if (terminalID.equals("scoansi") || terminalID.equals("ansi")) {
                                                for (int i = 0; i < scoansi_acs.length(); i += 2) {
                                                    if (c == scoansi_acs.charAt(i)) {
                                                        c = scoansi_acs.charAt(i + 1);
                                                        break;
                                                    }
                                                }
                                            }

                                            if (c >= '\u005f' && c <= '\u007e') {
                                                c = DECSPECIAL[(short) c - 0x5f];
                                                mapped = true;
                                            }

                                            break;

                                        case '<': // 'user preferred' is currently 'ISO Latin-1 suppl
                                            c = (char)((c & 0x7f) | 0x80);
                                            mapped = true;
                                            break;

                                        case 'A':
                                        case 'B': // Latin-1 , ASCII -> fall through
                                            mapped = true;
                                            break;

                                        default:
                                            debug("Unsupported GL mapping: " + gx[thisgl]);
                                            break;
                                    }
                                }

                                if (!mapped && (c >= '\u0080' && c <= '\u00ff')) {
                                    switch (gx[gr]) {
                                        case '0':
                                            if (c >= '\u00df' && c <= '\u00fe') {
                                                c = DECSPECIAL[c - '\u00df'];
                                                mapped = true;
                                            }

                                            break;

                                        case '<':
                                        case 'A':
                                        case 'B':
                                            mapped = true;
                                            break;

                                        default:
                                            debug("Unsupported GR mapping: " + gx[gr]);
                                            break;
                                    }
                                }
                            }

                            if (!mapped && useibmcharset)
                                c = map_cp850_unicode(c);

                            /*if(true || (statusmode == 0)) { */
                            if (isWide) {
                                if (C >= columns - 1) {
                                    if (wraparound) {
                                        int bot = rows;

                                        // If we're in the scroll region, check against the bottom margin
                                        if (R <= getBottomMargin() && R >= getTopMargin())
                                            bot = getBottomMargin() + 1;

                                        if (R < bot - 1)
                                            R++;
                                        else {
                                            if (debug > 3) debug("scrolling due to wrap at " + R);

                                            insertLine(R, 1, SCROLL_UP);
                                        }

                                        C = 0;
                                    }
                                    else {
                                        // cursor stays on last wide character.
                                        C = columns - 2;
                                    }
                                }
                            }

                            if (insertmode == 1) {
                                if (isWide) {
                                    insertChar(C++, R, c, attributes | FULLWIDTH);
                                    insertChar(C, R, ' ', attributes | FULLWIDTH);
                                }
                                else
                                    insertChar(C, R, c, attributes);
                            }
                            else {
                                if (isWide) {
                                    putChar(C++, R, c, attributes | FULLWIDTH);
                                    putChar(C, R, ' ', attributes | FULLWIDTH);
                                }
                                else
                                    putChar(C, R, c, attributes);
                            }

                            /*
                              } else {
                              if (insertmode==1) {
                              insertChar(C, rows, c, attributes);
                              } else {
                              putChar(C, rows, c, attributes);
                              }
                              }
                            */
                            C++;
                            break;
                        }
                } /* switch(c) */

                break;

            case TSTATE_OSC:
                if ((c < 0x20) && (c != ESC)) {// NP - No printing character
                    handle_osc(osc);
                    term_state = TSTATE_DATA;
                    break;
                }

                //but check for vt102 ESC \
                if (c == '\\' && osc.charAt(osc.length() - 1) == ESC) {
                    handle_osc(osc);
                    term_state = TSTATE_DATA;
                    break;
                }

                osc = osc + c;
                break;

            case TSTATE_ESCSPACE:
                term_state = TSTATE_DATA;

                switch (c) {
                    case 'F': /* S7C1T, Disable output of 8-bit controls, use 7-bit */
                        output8bit = false;
                        break;

                    case 'G': /* S8C1T, Enable output of 8-bit control codes*/
                        output8bit = true;
                        break;

                    default:
                        debug("ESC <space> " + c + " unhandled.");
                }

                break;

            case TSTATE_ESC:
                term_state = TSTATE_DATA;

                switch (c) {
                    case ' ':
                        term_state = TSTATE_ESCSPACE;
                        break;

                    case '#':
                        term_state = TSTATE_ESCSQUARE;
                        break;

                    case 'c':
                        /* Hard terminal reset */
                        reset();
                        break;

                    case '[':
                        DCEvar = 0;
                        DCEvars[0] = 0;
                        DCEvars[1] = 0;
                        DCEvars[2] = 0;
                        DCEvars[3] = 0;
                        term_state = TSTATE_CSI;
                        break;

                    case ']':
                        osc = "";
                        term_state = TSTATE_OSC;
                        break;

                    case 'P':
                        dcs = "";
                        term_state = TSTATE_DCS;
                        break;

                    case 'A': /* CUU */
                        R--;

                        if (R < 0) R = 0;

                        break;

                    case 'B': /* CUD */
                        R++;

                        if (R >= rows) R = rows - 1;

                        break;

                    case 'C':
                        C++;

                        if (C >= columns) C = columns - 1;

                        break;

                    case 'I': // RI
                        insertLine(R, 1, SCROLL_DOWN);
                        break;

                    case 'E': /* NEL */
                        if (R == getBottomMargin() || R == rows - 1)
                            insertLine(R, 1, SCROLL_UP);
                        else
                            R++;

                        C = 0;

                        if (debug > 1)
                            debug("ESC E (at " + R + ")");

                        break;

                    case 'D': /* IND */
                        if (R == getBottomMargin() || R == rows - 1)
                            insertLine(R, 1, SCROLL_UP);
                        else
                            R++;

                        if (debug > 1)
                            debug("ESC D (at " + R + " )");

                        break;

                    case 'J': /* erase to end of screen */
                        if (R < rows - 1)
                            deleteArea(0, R + 1, columns, rows - R - 1, attributes);

                        if (C < columns - 1)
                            deleteArea(C, R, columns - C, 1, attributes);

                        break;

                    case 'K':
                        if (C < columns - 1)
                            deleteArea(C, R, columns - C, 1, attributes);

                        break;

                    case 'M': // RI
                        debug("ESC M : R is " + R + ", tm is " + getTopMargin() + ", bm is " + getBottomMargin());

                        if (R > getTopMargin()) { // just go up 1 line.
                            R--;
                        }
                        else {   // scroll down
                            insertLine(R, 1, SCROLL_DOWN);
                        }

                        /* else do nothing ; */
                        if (debug > 2)
                            debug("ESC M ");

                        break;

                    case 'H':
                        if (debug > 1)
                            debug("ESC H at " + C);

                        /* right border probably ...*/
                        if (C >= columns)
                            C = columns - 1;

                        Tabs[C] = 1;
                        break;

                    case 'N': // SS2
                        onegl = 2;
                        break;

                    case 'O': // SS3
                        onegl = 3;
                        break;

                    case '=':

                        /*application keypad*/
                        if (debug > 0)
                            debug("ESC =");

                        keypadmode = true;
                        break;

                    case '<': /* vt52 mode off */
                        vt52mode = false;
                        break;

                    case '>': /*normal keypad*/
                        if (debug > 0)
                            debug("ESC >");

                        keypadmode = false;
                        break;

                    case '7': /* DECSC: save cursor, attributes */
                        Sc = C;
                        Sr = R;
                        Sgl = gl;
                        Sgr = gr;
                        Sa = attributes;
                        Sgx = new char[4];

                        for (int i = 0; i < 4; i++) Sgx[i] = gx[i];

                        if (debug > 1)
                            debug("ESC 7");

                        break;

                    case '8': /* DECRC: restore cursor, attributes */
                        C = Sc;
                        R = Sr;
                        gl = Sgl;
                        gr = Sgr;

                        if (Sgx != null)
                            for (int i = 0; i < 4; i++) gx[i] = Sgx[i];

                        attributes = Sa;

                        if (debug > 1)
                            debug("ESC 8");

                        break;

                    case '(': /* Designate G0 Character set (ISO 2022) */
                        term_state = TSTATE_SETG0;
                        usedcharsets = true;
                        break;

                    case ')': /* Designate G1 character set (ISO 2022) */
                        term_state = TSTATE_SETG1;
                        usedcharsets = true;
                        break;

                    case '*': /* Designate G2 Character set (ISO 2022) */
                        term_state = TSTATE_SETG2;
                        usedcharsets = true;
                        break;

                    case '+': /* Designate G3 Character set (ISO 2022) */
                        term_state = TSTATE_SETG3;
                        usedcharsets = true;
                        break;

                    case '~': /* Locking Shift 1, right */
                        gr = 1;
                        usedcharsets = true;
                        break;

                    case 'n': /* Locking Shift 2 */
                        gl = 2;
                        usedcharsets = true;
                        break;

                    case '}': /* Locking Shift 2, right */
                        gr = 2;
                        usedcharsets = true;
                        break;

                    case 'o': /* Locking Shift 3 */
                        gl = 3;
                        usedcharsets = true;
                        break;

                    case '|': /* Locking Shift 3, right */
                        gr = 3;
                        usedcharsets = true;
                        break;

                    case 'Y': /* vt52 cursor address mode , next chars are x,y */
                        term_state = TSTATE_VT52Y;
                        break;

                    case '_':
                        term_state = TSTATE_TITLE;
                        break;

                    case '\\':
                        // TODO save title
                        term_state = TSTATE_DATA;
                        break;

                    default:
                        debug("ESC unknown letter: " + c + " (" + ((int) c) + ")");
                        break;
                }

                break;

            case TSTATE_VT52X:
                C = c - 37;

                if (C < 0)
                    C = 0;
                else if (C >= width)
                    C = width - 1;

                term_state = TSTATE_VT52Y;
                break;

            case TSTATE_VT52Y:
                R = c - 37;

                if (R < 0)
                    R = 0;
                else if (R >= height)
                    R = height - 1;

                term_state = TSTATE_DATA;
                break;

            case TSTATE_SETG0:
                if (c != '0' && c != 'A' && c != 'B' && c != '<')
                    debug("ESC ( " + c + ": G0 char set?  (" + ((int) c) + ")");
                else {
                    if (debug > 2) debug("ESC ( : G0 char set  (" + c + " " + ((int) c) + ")");

                    gx[0] = c;
                }

                term_state = TSTATE_DATA;
                break;

            case TSTATE_SETG1:
                if (c != '0' && c != 'A' && c != 'B' && c != '<') {
                    debug("ESC ) " + c + " (" + ((int) c) + ") :G1 char set?");
                }
                else {
                    if (debug > 2) debug("ESC ) :G1 char set  (" + c + " " + ((int) c) + ")");

                    gx[1] = c;
                }

                term_state = TSTATE_DATA;
                break;

            case TSTATE_SETG2:
                if (c != '0' && c != 'A' && c != 'B' && c != '<')
                    debug("ESC*:G2 char set?  (" + ((int) c) + ")");
                else {
                    if (debug > 2) debug("ESC*:G2 char set  (" + c + " " + ((int) c) + ")");

                    gx[2] = c;
                }

                term_state = TSTATE_DATA;
                break;

            case TSTATE_SETG3:
                if (c != '0' && c != 'A' && c != 'B' && c != '<')
                    debug("ESC+:G3 char set?  (" + ((int) c) + ")");
                else {
                    if (debug > 2) debug("ESC+:G3 char set  (" + c + " " + ((int) c) + ")");

                    gx[3] = c;
                }

                term_state = TSTATE_DATA;
                break;

            case TSTATE_ESCSQUARE:
                switch (c) {
                    case '8':
                        for (int i = 0; i < columns; i++)
                            for (int j = 0; j < rows; j++)
                                putChar(i, j, 'E', 0);

                        break;

                    default:
                        debug("ESC # " + c + " not supported.");
                        break;
                }

                term_state = TSTATE_DATA;
                break;

            case TSTATE_DCS:
                if (c == '\\' && dcs.charAt(dcs.length() - 1) == ESC) {
                    handle_dcs(dcs);
                    term_state = TSTATE_DATA;
                    break;
                }

                dcs = dcs + c;
                break;

            case TSTATE_DCEQ:
                term_state = TSTATE_DATA;

                switch (c) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                        DCEvars[DCEvar] = DCEvars[DCEvar] * 10 + (c) - 48;
                        term_state = TSTATE_DCEQ;
                        break;

                    case ';':
                        DCEvar++;
                        DCEvars[DCEvar] = 0;
                        term_state = TSTATE_DCEQ;
                        break;

                    case 's': // XTERM_SAVE missing!
                        if (true || debug > 1)
                            debug("ESC [ ? " + DCEvars[0] + " s unimplemented!");

                        break;

                    case 'r': // XTERM_RESTORE
                        if (true || debug > 1)
                            debug("ESC [ ? " + DCEvars[0] + " r");

                        /* DEC Mode reset */
                        for (int i = 0; i <= DCEvar; i++) {
                            switch (DCEvars[i]) {
                                case 3: /* 80 columns*/
                                    setScreenSize(80, height, true);
                                    break;

                                case 4: /* scrolling mode, smooth */
                                    break;

                                case 5: /* light background */
                                    break;

                                case 6: /* DECOM (Origin Mode) move inside margins. */
                                    moveoutsidemargins = true;
                                    break;

                                case 7: /* DECAWM: Autowrap Mode */
                                    wraparound = false;
                                    break;

                                case 12:/* local echo off */
                                    break;

                                case 9:     /* X10 mouse */
                                case 1000:  /* xterm style mouse report on */
                                case 1001:
                                case 1002:
                                case 1003:
                                    mouserpt = DCEvars[i];
                                    break;

                                default:
                                    debug("ESC [ ? " + DCEvars[0] + " r, unimplemented!");
                            }
                        }

                        break;

                    case 'h': // DECSET
                        if (debug > 0)
                            debug("ESC [ ? " + DCEvars[0] + " h");

                        /* DEC Mode set */
                        for (int i = 0; i <= DCEvar; i++) {
                            switch (DCEvars[i]) {
                                case 1:  /* Application cursor keys */
                                    KeyUp[0] = "\u001bOA";
                                    KeyDown[0] = "\u001bOB";
                                    KeyRight[0] = "\u001bOC";
                                    KeyLeft[0] = "\u001bOD";
                                    break;

                                case 2: /* DECANM */
                                    vt52mode = false;
                                    break;

                                case 3: /* 132 columns*/
                                    setScreenSize(132, height, true);
                                    break;

                                case 6: /* DECOM: move inside margins. */
                                    moveoutsidemargins = false;
                                    break;

                                case 7: /* DECAWM: Autowrap Mode */
                                    wraparound = true;
                                    break;

                                case 25: /* turn cursor on */
                                    showCursor(true);
                                    break;

                                case 9:     /* X10 mouse */
                                case 1000:  /* xterm style mouse report on */
                                case 1001:
                                case 1002:
                                case 1003:
                                    mouserpt = DCEvars[i];
                                    break;

                                /* unimplemented stuff, fall through */
                                /* 4  - scrolling mode, smooth */
                                /* 5  - light background */
                                /* 12 - local echo off */
                                /* 18 - DECPFF - Printer Form Feed Mode -> On */
                                /* 19 - DECPEX - Printer Extent Mode -> Screen */
                                default:
                                    debug("ESC [ ? " + DCEvars[0] + " h, unsupported.");
                                    break;
                            }
                        }

                        break;

                    case 'i': // DEC Printer Control, autoprint, echo screenchars to printer

                        // This is different to CSI i!
                        // Also: "Autoprint prints a final display line only when the
                        // cursor is moved off the line by an autowrap or LF, FF, or
                        // VT (otherwise do not print the line)."
                        switch (DCEvars[0]) {
                            case 1:
                                if (debug > 1)
                                    debug("CSI ? 1 i : Print line containing cursor");

                                break;

                            case 4:
                                if (debug > 1)
                                    debug("CSI ? 4 i : Start passthrough printing");

                                break;

                            case 5:
                                if (debug > 1)
                                    debug("CSI ? 4 i : Stop passthrough printing");

                                break;
                        }

                        break;

                    case 'l': //DECRST

                        /* DEC Mode reset */
                        if (debug > 0)
                            debug("ESC [ ? " + DCEvars[0] + " l");

                        for (int i = 0; i <= DCEvar; i++) {
                            switch (DCEvars[i]) {
                                case 1:  /* Application cursor keys */
                                    KeyUp[0] = "\u001b[A";
                                    KeyDown[0] = "\u001b[B";
                                    KeyRight[0] = "\u001b[C";
                                    KeyLeft[0] = "\u001b[D";
                                    break;

                                case 2: /* DECANM */
                                    vt52mode = true;
                                    break;

                                case 3: /* 80 columns*/
                                    setScreenSize(80, height, true);
                                    break;

                                case 6: /* DECOM: move outside margins. */
                                    moveoutsidemargins = true;
                                    break;

                                case 7: /* DECAWM: Autowrap Mode OFF */
                                    wraparound = false;
                                    break;

                                case 25: /* turn cursor off */
                                    showCursor(false);
                                    break;

                                /* Unimplemented stuff: */
                                /* 4  - scrolling mode, jump */
                                /* 5  - dark background */
                                /* 7  - DECAWM - no wrap around mode */
                                /* 12 - local echo on */
                                /* 18 - DECPFF - Printer Form Feed Mode -> Off*/
                                /* 19 - DECPEX - Printer Extent Mode -> Scrolling Region */
                                case 9:     /* X10 mouse */
                                case 1000:  /* xterm style mouse report OFF */
                                case 1001:
                                case 1002:
                                case 1003:
                                    mouserpt = 0;
                                    break;

                                default:
                                    debug("ESC [ ? " + DCEvars[0] + " l, unsupported.");
                                    break;
                            }
                        }

                        break;

                    case 'n':
                        if (debug > 0)
                            debug("ESC [ ? " + DCEvars[0] + " n");

                        switch (DCEvars[0]) {
                            case 15:
                                /* printer? no printer. */
                                write((ESC) + "[?13n", false);
                                debug("ESC[5n");
                                break;

                            default:
                                debug("ESC [ ? " + DCEvars[0] + " n, unsupported.");
                                break;
                        }

                        break;

                    default:
                        debug("ESC [ ? " + DCEvars[0] + " " + c + ", unsupported.");
                        break;
                }

                break;

            case TSTATE_CSI_EX:
                term_state = TSTATE_DATA;

                switch (c) {
                    case ESC:
                        term_state = TSTATE_ESC;
                        break;

                    default:
                        debug("Unknown character ESC[! character is " + (int) c);
                        break;
                }

                break;

            case TSTATE_CSI_TICKS:
                term_state = TSTATE_DATA;

                switch (c) {
                    case 'p':
                        debug("Conformance level: " + DCEvars[0] + " (unsupported)," + DCEvars[1]);

                        if (DCEvars[0] == 61) {
                            output8bit = false;
                            break;
                        }

                        if (DCEvars[1] == 1) {
                            output8bit = false;
                        }
                        else {
                            output8bit = true; /* 0 or 2 */
                        }

                        break;

                    default:
                        debug("Unknown ESC [...  \"" + c);
                        break;
                }

                break;

            case TSTATE_CSI_EQUAL:
                term_state = TSTATE_DATA;

                switch (c) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                        DCEvars[DCEvar] = DCEvars[DCEvar] * 10 + (c) - 48;
                        term_state = TSTATE_CSI_EQUAL;
                        break;

                    case ';':
                        DCEvar++;
                        DCEvars[DCEvar] = 0;
                        term_state = TSTATE_CSI_EQUAL;
                        break;

                    case 'F': { /* SCO ANSI foreground */
                            int newcolor;
                            debug("ESC [ = " + DCEvars[0] + " F");
                            attributes &= ~COLOR_FG;
                            newcolor = ((DCEvars[0] & 1) << 2) |
                                       (DCEvars[0] & 2)   |
                                       ((DCEvars[0] & 4) >> 2) ;
                            attributes |= (newcolor + 1) << COLOR_FG_SHIFT;
                            break;
                        }

                    case 'G': { /* SCO ANSI background */
                            int newcolor;
                            debug("ESC [ = " + DCEvars[0] + " G");
                            attributes &= ~COLOR_BG;
                            newcolor = ((DCEvars[0] & 1) << 2) |
                                       (DCEvars[0] & 2)   |
                                       ((DCEvars[0] & 4) >> 2) ;
                            attributes |= (newcolor + 1) << COLOR_BG_SHIFT;
                            break;
                        }

                    default:
                        debugStr.append("Unknown ESC [ = ");

                        for (int i = 0; i <= DCEvar; i++) {
                            debugStr.append(DCEvars[i])
                            .append(',');
                        }

                        debugStr.append(c);
                        debug(debugStr.toString());
                        debugStr.setLength(0);
                        break;
                }

                break;

            case TSTATE_CSI_DOLLAR:
                term_state = TSTATE_DATA;

                switch (c) {
                    case '}':
                        debug("Active Status Display now " + DCEvars[0]);
                        statusmode = DCEvars[0];
                        break;

                    /* bad documentation?
                       case '-':
                       debug("Set Status Display now "+DCEvars[0]);
                       break;
                    */
                    case '~':
                        debug("Status Line mode now " + DCEvars[0]);
                        break;

                    default:
                        debug("UNKNOWN Status Display code " + c + ", with Pn=" + DCEvars[0]);
                        break;
                }

                break;

            case TSTATE_CSI:
                term_state = TSTATE_DATA;

                switch (c) {
                    case '"':
                        term_state = TSTATE_CSI_TICKS;
                        break;

                    case '$':
                        term_state = TSTATE_CSI_DOLLAR;
                        break;

                    case '=':
                        term_state = TSTATE_CSI_EQUAL;
                        break;

                    case '!':
                        term_state = TSTATE_CSI_EX;
                        break;

                    case '?':
                        DCEvar = 0;
                        DCEvars[0] = 0;
                        term_state = TSTATE_DCEQ;
                        break;

                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                        DCEvars[DCEvar] = DCEvars[DCEvar] * 10 + (c) - 48;
                        term_state = TSTATE_CSI;
                        break;

                    case ';':
                        DCEvar++;
                        DCEvars[DCEvar] = 0;
                        term_state = TSTATE_CSI;
                        break;

                    case 'c':/* send primary device attributes */
                        /* send (ESC[?61c) */
                        String subcode = "";

                        if (terminalID.equals("vt320")) subcode = "63;";

                        if (terminalID.equals("vt220")) subcode = "62;";

                        if (terminalID.equals("vt100")) subcode = "61;";

                        write((ESC) + "[?" + subcode + "1;2c", false);

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " c");

                        break;

                    case 'q':
                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " q");

                        break;

                    case 'g':

                        /* used for tabsets */
                        switch (DCEvars[0]) {
                            case 3:/* clear them */
                                Tabs = new byte[width];
                                break;

                            case 0:
                                Tabs[C] = 0;
                                break;
                        }

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " g");

                        break;

                    case 'h':
                        switch (DCEvars[0]) {
                            case 4:
                                insertmode = 1;
                                break;

                            case 20:
                                debug("Setting CRLF to TRUE");
                                sendcrlf = true;
                                break;

                            default:
                                debug("unsupported: ESC [ " + DCEvars[0] + " h");
                                break;
                        }

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " h");

                        break;

                    case 'i': // Printer Controller mode.

                        // "Transparent printing sends all output, except the CSI 4 i
                        //  termination string, to the printer and not the screen,
                        //  uses an 8-bit channel if no parity so NUL and DEL will be
                        //  seen by the printer and by the termination recognizer code,
                        //  and all translation and character set selections are
                        //  bypassed."
                        switch (DCEvars[0]) {
                            case 0:
                                if (debug > 1)
                                    debug("CSI 0 i:  Print Screen, not implemented.");

                                break;

                            case 4:
                                if (debug > 1)
                                    debug("CSI 4 i:  Enable Transparent Printing, not implemented.");

                                break;

                            case 5:
                                if (debug > 1)
                                    debug("CSI 4/5 i:  Disable Transparent Printing, not implemented.");

                                break;

                            default:
                                debug("ESC [ " + DCEvars[0] + " i, unimplemented!");
                        }

                        break;

                    case 'l':
                        switch (DCEvars[0]) {
                            case 4:
                                insertmode = 0;
                                break;

                            case 20:
                                debug("Setting CRLF to FALSE");
                                sendcrlf = false;
                                break;

                            default:
                                debug("ESC [ " + DCEvars[0] + " l, unimplemented!");
                                break;
                        }

                        break;

                    case 'A': { // CUU
                            int limit;

                            /* FIXME: xterm only cares about 0 and topmargin */
                            if (R >= getTopMargin()) {
                                limit = getTopMargin();
                            }
                            else
                                limit = 0;

                            if (DCEvars[0] == 0)
                                R--;
                            else
                                R -= DCEvars[0];

                            if (R < limit)
                                R = limit;

                            if (debug > 1)
                                debug("ESC [ " + DCEvars[0] + " A");

                            break;
                        }

                    case 'B': // CUD
                        /* cursor down n (1) times */
                        {
                            int limit;

                            if (R <= getBottomMargin()) {
                                limit = getBottomMargin();
                            }
                            else
                                limit = rows - 1;

                            if (DCEvars[0] == 0)
                                R++;
                            else
                                R += DCEvars[0];

                            if (R > limit)
                                R = limit;
                            else {
                                if (debug > 2) debug("Not limited.");
                            }

                            if (debug > 2) debug("to: " + R);

                            if (debug > 1)
                                debug("ESC [ " + DCEvars[0] + " B (at C=" + C + ")");

                            break;
                        }

                    case 'C':
                        if (DCEvars[0] == 0)
                            DCEvars[0] = 1;

                        while (DCEvars[0]-- > 0) {
                            C++;
                        }

                        if (C >= columns)
                            C = columns - 1;

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " C");

                        break;

                    case 'd': // CVA
                        R = DCEvars[0] - 1;

                        if (R < 0)
                            R = 0;
                        else if (R >= height)
                            R = height - 1;

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " d");

                        break;

                    case 'D':
                        if (DCEvars[0] == 0)
                            DCEvars[0] = 1;

                        while (DCEvars[0]-- > 0) {
                            C--;
                        }

                        if (C < 0) C = 0;

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " D");

                        break;

                    case 'r': // DECSTBM
                        if (DCEvar > 0) { //  Ray:  Any argument is optional
                            R = DCEvars[1] - 1;

                            if (R < 0)
                                R = rows - 1;
                            else if (R >= rows) {
                                R = rows - 1;
                            }
                        }
                        else
                            R = rows - 1;

                        int bot = R;

                        if (R >= DCEvars[0]) {
                            R = DCEvars[0] - 1;

                            if (R < 0)
                                R = 0;
                        }

                        setMargins(R, bot);
                        _SetCursor(0, 0);

                        if (debug > 1)
                            debug("ESC [" + DCEvars[0] + " ; " + DCEvars[1] + " r");

                        break;

                    case 'G':  /* CUP  / cursor absolute column */
                        C = DCEvars[0];

                        if (C < 0)
                            C = 0;
                        else if (C >= width)
                            C = width - 1;

                        if (debug > 1) debug("ESC [ " + DCEvars[0] + " G");

                        break;

                    case 'H':  /* CUP  / cursor position */
                        /* gets 2 arguments */
                        _SetCursor(DCEvars[0] - 1, DCEvars[1] - 1);

                        if (debug > 2) {
                            debug("ESC [ " + DCEvars[0] + ";" + DCEvars[1] + " H, moveoutsidemargins " + moveoutsidemargins);
                            debug("	-> R now " + R + ", C now " + C);
                        }

                        break;

                    case 'f':  /* move cursor 2 */
                        /* gets 2 arguments */
                        R = DCEvars[0] - 1;
                        C = DCEvars[1] - 1;

                        if (C < 0)
                            C = 0;
                        else if (C >= width)
                            C = width - 1;

                        if (R < 0)
                            R = 0;
                        else if (R >= height)
                            R = height - 1;

                        if (debug > 2)
                            debug("ESC [ " + DCEvars[0] + ";" + DCEvars[1] + " f");

                        break;

                    case 'S': /* ind aka 'scroll forward' */
                        if (DCEvars[0] == 0)
                            insertLine(getBottomMargin(), SCROLL_UP);
                        else
                            insertLine(getBottomMargin(), DCEvars[0], SCROLL_UP);

                        break;

                    case 'L':

                        /* insert n lines */
                        if (DCEvars[0] == 0)
                            insertLine(R, SCROLL_DOWN);
                        else
                            insertLine(R, DCEvars[0], SCROLL_DOWN);

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + "" + (c) + " (at R " + R + ")");

                        break;

                    case 'T': /* 'ri' aka scroll backward */
                        if (DCEvars[0] == 0)
                            insertLine(getTopMargin(), SCROLL_DOWN);
                        else
                            insertLine(getTopMargin(), DCEvars[0], SCROLL_DOWN);

                        break;

                    case 'M':
                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + "" + (c) + " at R=" + R);

                        if (DCEvars[0] == 0)
                            deleteLine(R);
                        else
                            for (int i = 0; i < DCEvars[0]; i++)
                                deleteLine(R);

                        break;

                    case 'K':
                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " K");

                        /* clear in line */
                        switch (DCEvars[0]) {
                            case 6: /* 97801 uses ESC[6K for delete to end of line */
                            case 0:/*clear to right*/
                                if (C < columns - 1)
                                    deleteArea(C, R, columns - C, 1, attributes);

                                break;

                            case 1:/*clear to the left, including this */
                                if (C > 0)
                                    deleteArea(0, R, C + 1, 1, attributes);

                                break;

                            case 2:/*clear whole line */
                                deleteArea(0, R, columns, 1, attributes);
                                break;
                        }

                        break;

                    case 'J':

                        /* clear below current line */
                        switch (DCEvars[0]) {
                            case 0:
                                if (R < rows - 1)
                                    deleteArea(0, R + 1, columns, rows - R - 1, attributes);

                                if (C < columns - 1)
                                    deleteArea(C, R, columns - C, 1, attributes);

                                break;

                            case 1:
                                if (R > 0)
                                    deleteArea(0, 0, columns, R, attributes);

                                if (C > 0)
                                    deleteArea(0, R, C + 1, 1, attributes);  // include up to and including current

                                break;

                            case 2:
                                deleteArea(0, 0, columns, rows, attributes);
                                break;
                        }

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " J");

                        break;

                    case '@':
                        if (DCEvars[0] == 0) DCEvars[0] = 1;

                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " @");

                        for (int i = 0; i < DCEvars[0]; i++)
                            insertChar(C, R, ' ', attributes);

                        break;

                    case 'X': {
                            int toerase = DCEvars[0];

                            if (debug > 1)
                                debug("ESC [ " + DCEvars[0] + " X, C=" + C + ",R=" + R);

                            if (toerase == 0)
                                toerase = 1;

                            if (toerase + C > columns)
                                toerase = columns - C;

                            deleteArea(C, R, toerase, 1, attributes);
                            // does not change cursor position
                            break;
                        }

                    case 'P':
                        if (debug > 1)
                            debug("ESC [ " + DCEvars[0] + " P, C=" + C + ",R=" + R);

                        if (DCEvars[0] == 0) DCEvars[0] = 1;

                        for (int i = 0; i < DCEvars[0]; i++)
                            deleteChar(C, R);

                        break;

                    case 'n':
                        switch (DCEvars[0]) {
                            case 5: /* malfunction? No malfunction. */
                                writeSpecial((ESC) + "[0n");

                                if (debug > 1)
                                    debug("ESC[5n");

                                break;

                            case 6:
                                // DO NOT offset R and C by 1! (checked against /usr/X11R6/bin/resize
                                // FIXME check again.
                                // FIXME: but vttest thinks different???
                                writeSpecial((ESC) + "[" + R + ";" + C + "R");

                                if (debug > 1)
                                    debug("ESC[6n");

                                break;

                            default:
                                if (debug > 0)
                                    debug("ESC [ " + DCEvars[0] + " n??");

                                break;
                        }

                        break;

                    case 's':  /* DECSC - save cursor */
                        Sc = C;
                        Sr = R;
                        Sa = attributes;

                        if (debug > 3)
                            debug("ESC[s");

                        break;

                    case 'u': /* DECRC - restore cursor */
                        C = Sc;
                        R = Sr;
                        attributes = Sa;

                        if (debug > 3)
                            debug("ESC[u");

                        break;

                    case 'm':  /* attributes as color, bold , blink,*/
                        if (debug > 3)
                            debug("ESC [ ");

                        if (DCEvar == 0 && DCEvars[0] == 0)
                            attributes = 0;

                        for (int i = 0; i <= DCEvar; i++) {
                            switch (DCEvars[i]) {
                                case 0:
                                    if (DCEvar > 0) {
                                        if (terminalID.equals("scoansi")) {
                                            attributes &= COLOR; /* Keeps color. Strange but true. */
                                        }
                                        else {
                                            attributes = 0;
                                        }
                                    }

                                    break;

                                case 1:
                                    attributes |= BOLD;
                                    attributes &= ~LOW;
                                    break;

                                case 2:

                                    /* SCO color hack mode */
                                    if (terminalID.equals("scoansi") && ((DCEvar - i) >= 2)) {
                                        int ncolor;
                                        attributes &= ~(COLOR | BOLD);
                                        ncolor = DCEvars[i + 1];

                                        if ((ncolor & 8) == 8)
                                            attributes |= BOLD;

                                        ncolor = ((ncolor & 1) << 2) | (ncolor & 2) | ((ncolor & 4) >> 2);
                                        attributes |= ((ncolor) + 1) << COLOR_FG_SHIFT;
                                        ncolor = DCEvars[i + 2];
                                        ncolor = ((ncolor & 1) << 2) | (ncolor & 2) | ((ncolor & 4) >> 2);
                                        attributes |= ((ncolor) + 1) << COLOR_BG_SHIFT;
                                        i += 2;
                                    }
                                    else {
                                        attributes |= LOW;
                                    }

                                    break;

                                case 3: /* italics */
                                    attributes |= INVERT;
                                    break;

                                case 4:
                                    attributes |= UNDERLINE;
                                    break;

                                case 7:
                                    attributes |= INVERT;
                                    break;

                                case 8:
                                    attributes |= INVISIBLE;
                                    break;

                                case 5: /* blink on */
                                    break;

                                /* 10 - ANSI X3.64-1979, select primary font, don't display control
                                 *      chars, don't set bit 8 on output */
                                case 10:
                                    gl = 0;
                                    usedcharsets = true;
                                    break;

                                /* 11 - ANSI X3.64-1979, select second alt. font, display control
                                 *      chars, set bit 8 on output */
                                case 11: /* SMACS , as */
                                case 12:
                                    gl = 1;
                                    usedcharsets = true;
                                    break;

                                case 21: /* normal intensity */
                                    attributes &= ~(LOW | BOLD);
                                    break;

                                case 23: /* italics off */
                                    attributes &= ~INVERT;
                                    break;

                                case 25: /* blinking off */
                                    break;

                                case 27:
                                    attributes &= ~INVERT;
                                    break;

                                case 28:
                                    attributes &= ~INVISIBLE;
                                    break;

                                case 24:
                                    attributes &= ~UNDERLINE;
                                    break;

                                case 22:
                                    attributes &= ~BOLD;
                                    break;

                                case 30:
                                case 31:
                                case 32:
                                case 33:
                                case 34:
                                case 35:
                                case 36:
                                case 37:
                                    attributes &= ~COLOR_FG;
                                    attributes |= ((DCEvars[i] - 30) + 1) << COLOR_FG_SHIFT;
                                    break;

                                case 38:
                                    if (DCEvars[i + 1] == 5) {
                                        attributes &= ~COLOR_FG;
                                        attributes |= ((DCEvars[i + 2]) + 1) << COLOR_FG_SHIFT;
                                        i += 2;
                                    }

                                    break;

                                case 39:
                                    attributes &= ~COLOR_FG;
                                    break;

                                case 40:
                                case 41:
                                case 42:
                                case 43:
                                case 44:
                                case 45:
                                case 46:
                                case 47:
                                    attributes &= ~COLOR_BG;
                                    attributes |= ((DCEvars[i] - 40) + 1) << COLOR_BG_SHIFT;
                                    break;

                                case 48:
                                    if (DCEvars[i + 1] == 5) {
                                        attributes &= ~COLOR_BG;
                                        attributes |= (DCEvars[i + 2] + 1) << COLOR_BG_SHIFT;
                                        i += 2;
                                    }

                                    break;

                                case 49:
                                    attributes &= ~COLOR_BG;
                                    break;

                                case 90:
                                case 91:
                                case 92:
                                case 93:
                                case 94:
                                case 95:
                                case 96:
                                case 97:
                                    attributes &= ~COLOR_FG;
                                    attributes |= ((DCEvars[i] - 82) + 1) << COLOR_FG_SHIFT;
                                    break;

                                case 100:
                                case 101:
                                case 102:
                                case 103:
                                case 104:
                                case 105:
                                case 106:
                                case 107:
                                    attributes &= ~COLOR_BG;
                                    attributes |= ((DCEvars[i] - 92) + 1) << COLOR_BG_SHIFT;
                                    break;

                                default:
                                    debugStr.append("ESC [ ")
                                    .append(DCEvars[i])
                                    .append(" m unknown...");
                                    debug(debugStr.toString());
                                    debugStr.setLength(0);
                                    break;
                            }

                            if (debug > 3) {
                                debugStr.append(DCEvars[i])
                                .append(';');
                                debug(debugStr.toString());
                                debugStr.setLength(0);
                            }
                        }

                        if (debug > 3) {
                            debugStr.append(" (attributes = ")
                            .append(attributes)
                            .append(")m");
                            debug(debugStr.toString());
                            debugStr.setLength(0);
                        }

                        break;

                    default:
                        debugStr.append("ESC [ unknown letter: ")
                        .append(c)
                        .append(" (")
                        .append((int)c)
                        .append(')');
                        debug(debugStr.toString());
                        debugStr.setLength(0);
                        break;
                }

                break;

            case TSTATE_TITLE:
                switch (c) {
                    case ESC:
                        term_state = TSTATE_ESC;
                        break;

                    default:
                        // TODO save title
                        break;
                }

                break;

            default:
                term_state = TSTATE_DATA;
                break;
        }

        setCursorPosition(C, R);
    }

    /* hard reset the terminal */
    public void reset() {
        gx[0] = 'B';
        gx[1] = 'B';
        gx[2] = 'B';
        gx[3] = 'B';
        gl = 0;  // default GL to G0
        gr = 2;  // default GR to G2
        onegl = -1; // Single shift override
        /* reset tabs */
        int nw = width;

        if (nw < 132) nw = 132;

        Tabs = new byte[nw];

        for (int i = 0; i < nw; i += 8) {
            Tabs[i] = 1;
        }

        deleteArea(0, 0, width, height, attributes);
        setMargins(0, height);
        C = R = 0;
        _SetCursor(0, 0);

        if (display != null)
            display.resetColors();

        showCursor(true);
        /*FIXME:*/
        term_state = TSTATE_DATA;
    }
}