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redisplay-tty.c

/* Communication module for TTY terminals.
   Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
   Copyright (C) 1995 Sun Microsystems, Inc.
   Copyright (C) 1995, 1996 Ben Wing.
   Copyright (C) 1996 Chuck Thompson.

This file is part of XEmacs.

XEmacs 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, or (at your option) any
later version.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not completely synched with FSF.  Mostly divergent
   from FSF. */

/* This file has been Mule-ized. */

/* Written by Chuck Thompson. */
/* Color support added by Ben Wing. */

#include <config.h>
#include "lisp.h"

#include "buffer.h"
#include "console-tty.h"
#include "events.h"
#include "faces.h"
#include "frame.h"
#include "glyphs.h"
#include "lstream.h"
#include "objects-tty.h"
#include "redisplay.h"
#include "sysdep.h"
#include "window.h"

/* These headers #define all kinds of common words like "columns"...
   What a bunch of losers.  If we were to include them, we'd have to
   include them last to prevent them from messing up our own header
   files (struct slot names, etc.).  But it turns out that there are
   other conflicts as well on some systems, so screw it: we'll just
   re-declare the routines we use and assume the code in this file is
   invoking them correctly. */
/* # include <curses.h> */
/* # include <term.h> */
EXTERN_C int tgetent (const char *, const char *);
EXTERN_C int tgetflag (const char *);
EXTERN_C int tgetnum (const char *);
EXTERN_C char *tgetstr (const char *, char **);
EXTERN_C void tputs (const char *, int, void (*)(int));

#define FORCE_CURSOR_UPDATE(c) send_string_to_tty_console (c, 0, 0)
#define OUTPUTN(c, a, n)                  \
  do {                                    \
    cmputc_console = c;                   \
    FORCE_CURSOR_UPDATE (c);              \
    tputs (a, n, cmputc);                 \
  } while (0)
#define OUTPUT1(c, a) OUTPUTN (c, a, 1)
#define OUTPUTN_IF(c, a, n)               \
  do {                                    \
    cmputc_console = c;                   \
    FORCE_CURSOR_UPDATE (c);              \
    if (a)                          \
      tputs (a, n, cmputc);               \
  } while (0)
#define OUTPUT1_IF(c, a) OUTPUTN_IF (c, a, 1)

static void tty_output_emchar_dynarr (struct window *w,
                              struct display_line *dl,
                              Emchar_dynarr *buf, int xpos,
                              face_index findex,
                              int cursor);
static void tty_output_bufbyte_string (struct window *w,
                               struct display_line *dl,
                               Bufbyte *str, Bytecount len,
                               int xpos, face_index findex,
                               int cursor);
static void tty_turn_on_face (struct window *w, face_index findex);
static void tty_turn_off_face (struct window *w, face_index findex);
static void tty_turn_on_frame_face (struct frame *f, Lisp_Object face);
static void tty_turn_off_frame_face (struct frame *f, Lisp_Object face);

static void term_get_fkeys (Lisp_Object keymap, char **address);

/*****************************************************************************
 tty_text_width

 Non-Mule tty's don't have fonts (that we use at least), so everything
 is considered to be fixed width -- in other words, we return LEN.
 Under Mule, however, a character can still cover more than one
 column, so we use emchar_string_displayed_columns().
 ****************************************************************************/
static int
tty_text_width (struct frame *f, struct face_cachel *cachel, const Emchar *str,
            Charcount len)
{
  return emchar_string_displayed_columns (str, len);
}

/*****************************************************************************
 tty_divider_height

 Return the width of the horizontal divider.  This is a function
 because divider_height is a console method.
 ****************************************************************************/
static int
tty_divider_height (void)
{
  return 1;
}

/*****************************************************************************
 tty_eol_cursor_width

 Return the width of the end-of-line cursor.  This is a function
 because eol_cursor_width is a console method.
 ****************************************************************************/
static int
tty_eol_cursor_width (void)
{
  return 1;
}

/*****************************************************************************
 tty_frame_output_begin

 Perform any necessary initialization prior to an update.
 ****************************************************************************/
#ifdef DEBUG_XEMACS
void tty_frame_output_begin (struct frame *f);
void
#else
static void
#endif
tty_frame_output_begin (struct frame *f)
{
#ifndef HAVE_TERMIOS
  /* Termcap requires `ospeed' to be a global variable so we have to
     always set it for whatever tty console we are actually currently
     working with. */
  ospeed = DEVICE_TTY_DATA (XDEVICE (FRAME_DEVICE (f)))->ospeed;
#endif
}

/*****************************************************************************
 tty_frame_output_end

 Perform any necessary flushing of queues when an update has completed.
 ****************************************************************************/
#ifdef DEBUG_XEMACS
void tty_frame_output_end (struct frame *f);
void
#else
static void
#endif
tty_frame_output_end (struct frame *f)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  CONSOLE_TTY_CURSOR_X (c) = CONSOLE_TTY_FINAL_CURSOR_X (c);
  CONSOLE_TTY_CURSOR_Y (c) = CONSOLE_TTY_FINAL_CURSOR_Y (c);
  FORCE_CURSOR_UPDATE (c);
  Lstream_flush (XLSTREAM (CONSOLE_TTY_DATA (c)->outstream));
}

static void
tty_set_final_cursor_coords (struct frame *f, int y, int x)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  CONSOLE_TTY_FINAL_CURSOR_X (c) = x;
  CONSOLE_TTY_FINAL_CURSOR_Y (c) = y;
}

/*****************************************************************************
 tty_output_display_block

 Given a display line, a block number for that start line, output all
 runes between start and end in the specified display block.
 ****************************************************************************/
static void
tty_output_display_block (struct window *w, struct display_line *dl, int block,
                    int start, int end, int start_pixpos,
                    int cursor_start, int cursor_width,
                    int cursor_height)
{
  struct frame *f = XFRAME (w->frame);
  Emchar_dynarr *buf = Dynarr_new (Emchar);

  struct display_block *db = Dynarr_atp (dl->display_blocks, block);
  rune_dynarr *rba = db->runes;
  struct rune *rb;

  int elt = start;
  face_index findex;
  int xpos;

  rb = Dynarr_atp (rba, elt);

  if (!rb)
    {
      /* Nothing to do so don't do anything. */
      return;
    }
  else
    {
      findex = rb->findex;
      xpos = rb->xpos;
    }

  if (end < 0)
    end = Dynarr_length (rba);

  Dynarr_reset (buf);

  while (elt < end && Dynarr_atp (rba, elt)->xpos < start_pixpos)
    {
      elt++;
      findex = Dynarr_atp (rba, elt)->findex;
      xpos = Dynarr_atp (rba, elt)->xpos;
    }

  while (elt < end)
    {
      rb = Dynarr_atp (rba, elt);

      if (rb->findex == findex && rb->type == RUNE_CHAR
        && rb->object.chr.ch != '\n'
        && (rb->cursor_type != CURSOR_ON
            || NILP (w->text_cursor_visible_p)))
      {
        Dynarr_add (buf, rb->object.chr.ch);
        elt++;
      }
      else
      {
        if (Dynarr_length (buf))
          {
            tty_output_emchar_dynarr (w, dl, buf, xpos, findex, 0);
            xpos = rb->xpos;
          }
        Dynarr_reset (buf);

        if (rb->type == RUNE_CHAR)
          {
            findex = rb->findex;
            xpos = rb->xpos;

            if (rb->object.chr.ch == '\n')
            {
              /* Clear in case a cursor was formerly here. */

              Dynarr_add (buf, ' ');
              tty_output_emchar_dynarr (w, dl, buf, rb->xpos,
                                  DEFAULT_INDEX, 0);
              Dynarr_reset (buf);

              cmgoto (f, dl->ypos - 1, rb->xpos);

              elt++;
            }
            else if (rb->cursor_type == CURSOR_ON)
            {
              /* There is not a distinct eol cursor on tty's. */

              Dynarr_add (buf, rb->object.chr.ch);
              tty_output_emchar_dynarr (w, dl, buf, xpos, findex, 0);
              Dynarr_reset (buf);

              cmgoto (f, dl->ypos - 1, xpos);

              xpos += rb->width;
              elt++;
            }
          }
        /* #### RUNE_HLINE is actually a little more complicated than this
             but at the moment it is only used to draw a turned off
             modeline and this will suffice for that. */
        else if (rb->type == RUNE_BLANK || rb->type == RUNE_HLINE)
          {
            Emchar ch_to_add;
            int size = rb->width;

            if (rb->type == RUNE_BLANK)
            ch_to_add = ' ';
            else
            ch_to_add = '-';

            while (size--)
            Dynarr_add (buf, ch_to_add);
            tty_output_emchar_dynarr (w, dl, buf, rb->xpos, findex, 0);

            if (xpos >= cursor_start
              && cursor_start < xpos + Dynarr_length (buf))
            {
              cmgoto (f, dl->ypos - 1, cursor_start);
            }

            Dynarr_reset (buf);

            elt++;
            if (elt < end)
            {
              rb = Dynarr_atp (rba, elt);

              findex = rb->findex;
              xpos = rb->xpos;
            }
          }
        else if (rb->type == RUNE_DGLYPH)
          {
            Lisp_Object window;
            Lisp_Object instance;

            XSETWINDOW (window, w);
            instance = glyph_image_instance (rb->object.dglyph.glyph,
                                     window, ERROR_ME_NOT, 1);

            if (IMAGE_INSTANCEP (instance))
            {
              switch (XIMAGE_INSTANCE_TYPE (instance))
                {
                case IMAGE_MONO_PIXMAP:
                case IMAGE_COLOR_PIXMAP:
                case IMAGE_SUBWINDOW:
                case IMAGE_WIDGET:
                  /* just do nothing here */
                  break;

                case IMAGE_NOTHING:
                  /* nothing is as nothing does */
                  break;

                case IMAGE_TEXT:
                case IMAGE_POINTER:
                default:
                  ABORT ();
                }
              IMAGE_INSTANCE_OPTIMIZE_OUTPUT
                (XIMAGE_INSTANCE (instance)) = 0;
            }

            xpos += rb->width;
            elt++;
          }
        else
          ABORT ();
      }
    }

  if (Dynarr_length (buf))
    tty_output_emchar_dynarr (w, dl, buf, xpos, findex, 0);
  Dynarr_free (buf);

}



/*****************************************************************************
 tty_output_vertical_divider

 Draw a vertical divider down the right side of the given window.
 ****************************************************************************/
static void
tty_output_vertical_divider (struct window *w, int clear)
{
  /* Divider width can either be 0 or 1 on TTYs */
  if (window_divider_width (w))
    {
      struct frame *f = XFRAME (w->frame);
      struct console *c = XCONSOLE (FRAME_CONSOLE (f));
      int line;
      int y_top = WINDOW_TEXT_TOP (w);
      int y_bot = WINDOW_TEXT_BOTTOM (w);
      unsigned char divv = '|';

      tty_turn_on_face (w, MODELINE_INDEX);
      for (line = y_top; line < y_bot; line++)
      {
        cmgoto (f, line, WINDOW_TEXT_RIGHT (w));
        send_string_to_tty_console (c, &divv, 1);
        TTY_INC_CURSOR_X (c, 1);
      }

      /* Draw the divider in the modeline. */
      cmgoto (f, y_bot, WINDOW_TEXT_RIGHT (w));
      send_string_to_tty_console (c, &divv, 1);
      TTY_INC_CURSOR_X (c, 1);
      tty_turn_off_face (w, MODELINE_INDEX);
    }
}

/****************************************************************************
 tty_clear_region

 Clear the area in the box defined by the given parameters.
 ****************************************************************************/
static void
tty_clear_region (Lisp_Object window, struct device* d, struct frame * f,
              face_index findex, int x, int y,
              int width, int height, Lisp_Object fcolor, Lisp_Object bcolor,
              Lisp_Object background_pixmap)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));
  int line;
  struct window* w = XWINDOW (window);

  tty_turn_on_face (w, findex);
  for (line = y; line < y + height; line++)
    {
      int col;

      cmgoto (f, line, x);

      if (window_is_leftmost (w)
        && window_is_rightmost (w)
        && TTY_SE (c).clr_to_eol)
      {
        OUTPUT1 (c, TTY_SE (c).clr_to_eol);
      }
      else
      {
        unsigned char sp = ' ';
        /* #### Of course, this is all complete and utter crap. */
        for (col = x; col < x + width; col++)
          send_string_to_tty_console (c, &sp, 1);
        TTY_INC_CURSOR_X (c, width);
      }
    }
  tty_turn_off_face (w, findex);
  cmgoto (f, y, x);
}

/*****************************************************************************
 tty_clear_to_window_end

 Clear the area between ypos1 and ypos2.  Each margin area and the
 text area is handled separately since they may each have their own
 background color.
 ****************************************************************************/
static void
tty_clear_to_window_end (struct window *w, int ypos1, int ypos2)
{
  struct frame *f = XFRAME (w->frame);
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));
  int x, width;

  x = WINDOW_TEXT_LEFT (w);
  width = WINDOW_TEXT_WIDTH (w);

  if (window_is_rightmost (w))
    {
      /* #### Optimize to use clr_to_eol function of tty if available, if
       the window is the entire width of the frame. */
      /* #### Is this actually an optimization? */
      int line;
      tty_turn_on_face (w, DEFAULT_INDEX);
      for (line = ypos1; line < ypos2; line++)
      {
        cmgoto (XFRAME (w->frame), line, x);
        OUTPUT1 (c, TTY_SE (c).clr_to_eol);
      }
      tty_turn_off_face (w, DEFAULT_INDEX);
    }
  else
    {
      Lisp_Object window;

      XSETWINDOW (window, w);
      redisplay_clear_region (window, DEFAULT_INDEX, x, ypos1, width, ypos2 - ypos1);
    }
}

/****************************************************************************
 tty_clear_frame

 Clear the entire frame.
 ****************************************************************************/
static void
tty_clear_frame (struct frame *f)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  tty_turn_on_frame_face (f, Vdefault_face);
  if (TTY_SE (c).clr_frame)
    {
      OUTPUT1 (c, TTY_SE (c).clr_frame);
      CONSOLE_TTY_REAL_CURSOR_X (c) = 0;
      CONSOLE_TTY_REAL_CURSOR_Y (c) = 0;
#ifdef NOT_SURE
      FRAME_CURSOR_X (f) = 0;
      FRAME_CURSOR_Y (f) = 0;
#endif
    }
  else
    {
#ifdef NOT_SURE
      internal_cursor_to (f, 0, 0);
      clear_to_end (f);
#else
      /* #### Not implemented. */
      stderr_out ("Not yet.\n");
#endif
    }
  tty_turn_off_frame_face (f, Vdefault_face);
}

static void
tty_output_bufbyte_string (struct window *w, struct display_line *dl,
                     Bufbyte *str, Bytecount len, int xpos,
                     face_index findex, int cursor)
{
  struct frame *f = XFRAME (w->frame);
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  /* First position the cursor. */
  cmgoto (f, dl->ypos - 1, xpos);

  /* Enable any face properties. */
  tty_turn_on_face (w, findex);

  send_string_to_tty_console (c, str, len);
  TTY_INC_CURSOR_X (c, bufbyte_string_displayed_columns (str, len));

  /* Turn the face properties back off. */
  tty_turn_off_face (w, findex);
}

static Bufbyte_dynarr *tty_output_emchar_dynarr_dynarr;

/*****************************************************************************
 tty_output_emchar_dynarr

 Given a string and a starting position, output that string in the
 given face.  If cursor is true, draw a cursor around the string.
 ****************************************************************************/
static void
tty_output_emchar_dynarr (struct window *w, struct display_line *dl,
                    Emchar_dynarr *buf, int xpos, face_index findex,
                    int cursor)
{
  if (!tty_output_emchar_dynarr_dynarr)
    tty_output_emchar_dynarr_dynarr = Dynarr_new (Bufbyte);
  else
    Dynarr_reset (tty_output_emchar_dynarr_dynarr);

  convert_emchar_string_into_bufbyte_dynarr (Dynarr_atp (buf, 0),
                                  Dynarr_length (buf),
                                  tty_output_emchar_dynarr_dynarr);

  tty_output_bufbyte_string (w, dl,
                       Dynarr_atp (tty_output_emchar_dynarr_dynarr, 0),
                       Dynarr_length (tty_output_emchar_dynarr_dynarr),
                       xpos, findex, cursor);
}

#if 0

static Bufbyte_dynarr *sidcs_dynarr;

static void
substitute_in_dynamic_color_string (Lisp_Object spec, Lisp_Object string)
{
  int i;
  Bufbyte *specdata = XSTRING_DATA   (spec);
  Bytecount speclen = XSTRING_LENGTH (spec);

  if (!sidcs_dynarr)
    sidcs_dynarr = Dynarr_new (Bufbyte);
  else
    Dynarr_reset (sidcs_dynarr);

  for (i = 0; i < speclen; i++)
    {
      if (specdata[i] == '%' && specdata[i+1] == '%')
      {
        Dynarr_add (sidcs_dynarr, '%');
        i++;
      }
      else if (specdata[i] == '%' && specdata[i+1] == 's')
      {
        Dynarr_add_many (sidcs_dynarr,
                     XSTRING_DATA   (string),
                     XSTRING_LENGTH (string));
        i++;
      }
      else
      Dynarr_add (sidcs_dynarr, specdata[i]);
    }
}

#endif

static void
set_foreground_to (struct console *c, Lisp_Object sym)
{
  Lisp_Object result;
  Bufbyte *escseq = 0;
  Bytecount escseqlen = 0;

  result = assq_no_quit (sym, Vtty_color_alist);
  if (!NILP (result))
    {
      Lisp_Object esc_seq = XCAR (XCDR (result));
      escseq    = XSTRING_DATA   (esc_seq);
      escseqlen = XSTRING_LENGTH (esc_seq);
    }
#if 0
  else if (STRINGP (Vtty_dynamic_color_fg))
    {
      substitute_in_dynamic_color_string (Vtty_dynamic_color_fg,
                                Fsymbol_name (sym));
      escseq = Dynarr_atp (sidcs_dynarr, 0);
      escseqlen = Dynarr_length (sidcs_dynarr);
    }
#endif

  if (escseq)
    {
      send_string_to_tty_console (c, escseq, escseqlen);
    }
}

static void
set_background_to (struct console *c, Lisp_Object sym)
{
  Lisp_Object result;
  Bufbyte *escseq = 0;
  Bytecount escseqlen = 0;

  result = assq_no_quit (sym, Vtty_color_alist);
  if (!NILP (result))
    {
      Lisp_Object esc_seq = XCDR (XCDR (result));
      escseq    = XSTRING_DATA   (esc_seq);
      escseqlen = XSTRING_LENGTH (esc_seq);
    }
#if 0
  else if (STRINGP (Vtty_dynamic_color_bg))
    {
      substitute_in_dynamic_color_string (Vtty_dynamic_color_bg,
                                Fsymbol_name (sym));
      escseq = Dynarr_atp (sidcs_dynarr, 0);
      escseqlen = Dynarr_length (sidcs_dynarr);
    }
#endif

  if (escseq)
    {
      send_string_to_tty_console (c, escseq, escseqlen);
    }
}

static void
tty_turn_on_face_1 (struct console *c, int highlight_p,
                int blinking_p, int dim_p, int underline_p,
                int reverse_p, Lisp_Object cinst_fore,
                Lisp_Object cinst_back)
{
  if (highlight_p)
    {
      OUTPUT1_IF (c, TTY_SD (c).turn_on_bold);
    }

  if (blinking_p)
    {
      OUTPUT1_IF (c, TTY_SD (c).turn_on_blinking);
    }

  if (dim_p)
    {
      OUTPUT1_IF (c, TTY_SD (c).turn_on_dim);
    }

  if (underline_p)
    {
      /* #### punt for now if underline mode is glitchy */
      if (!TTY_FLAGS (c).underline_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).begin_underline);
      }
    }

  if (reverse_p)
    {
      /* #### punt for now if standout mode is glitchy */
      if (!TTY_FLAGS (c).standout_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).begin_standout);
      }
      else
      reverse_p = 0;
    }

  if (reverse_p)
    {
      Lisp_Object temp = cinst_fore;
      cinst_fore = cinst_back;
      cinst_back = temp;
    }

  if (COLOR_INSTANCEP (cinst_fore)
      && !EQ (cinst_fore, Vthe_null_color_instance))
    set_foreground_to (c, COLOR_INSTANCE_TTY_SYMBOL
                   (XCOLOR_INSTANCE (cinst_fore)));

  if (COLOR_INSTANCEP (cinst_back)
      && !EQ (cinst_back, Vthe_null_color_instance))
    set_background_to (c, COLOR_INSTANCE_TTY_SYMBOL
                   (XCOLOR_INSTANCE (cinst_back)));
}

/*****************************************************************************
 tty_turn_on_face

 Turn on all set properties of the given face.
 ****************************************************************************/
static void
tty_turn_on_face (struct window *w, face_index findex)
{
  struct frame *f = XFRAME (w->frame);
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  tty_turn_on_face_1 (c,
                  WINDOW_FACE_CACHEL_HIGHLIGHT_P (w, findex),
                  WINDOW_FACE_CACHEL_BLINKING_P (w, findex),
                  WINDOW_FACE_CACHEL_DIM_P (w, findex),
                  WINDOW_FACE_CACHEL_UNDERLINE_P (w, findex),
                  WINDOW_FACE_CACHEL_REVERSE_P (w, findex),
                  WINDOW_FACE_CACHEL_FOREGROUND (w, findex),
                  WINDOW_FACE_CACHEL_BACKGROUND (w, findex));
}

/*****************************************************************************
 tty_turn_off_face

 Turn off all set properties of the given face (revert to default
 face).  We assume that tty_turn_on_face has been called for the given
 face so that its properties are actually active.
 ****************************************************************************/
static void
tty_turn_off_face (struct window *w, face_index findex)
{
  struct frame *f = XFRAME (w->frame);
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  if (WINDOW_FACE_CACHEL_REVERSE_P (w, findex))
    {
      /* #### punt for now if standout mode is glitchy */
      if (!TTY_FLAGS (c).standout_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).end_standout);
      }
    }

  if (WINDOW_FACE_CACHEL_UNDERLINE_P (w, findex))
    {
      /* #### punt for now if underline mode is glitchy */
      if (!TTY_FLAGS (c).underline_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).end_underline);
      }
    }

  if (WINDOW_FACE_CACHEL_HIGHLIGHT_P (w, findex) ||
      WINDOW_FACE_CACHEL_BLINKING_P (w, findex) ||
      WINDOW_FACE_CACHEL_DIM_P (w, findex) ||
      !EQ (WINDOW_FACE_CACHEL_FOREGROUND (w, findex),
         Vthe_null_color_instance) ||
      !EQ (WINDOW_FACE_CACHEL_BACKGROUND (w, findex),
           Vthe_null_color_instance))
    {
      OUTPUT1_IF (c, TTY_SD (c).turn_off_attributes);
    }
}

/*****************************************************************************
 tty_turn_on_frame_face

 Turn on all set properties of the given face.
 ****************************************************************************/
static void
tty_turn_on_frame_face (struct frame *f, Lisp_Object face)
{
  Lisp_Object frame;
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  XSETFRAME (frame, f);
  tty_turn_on_face_1 (c,
                  FACE_HIGHLIGHT_P (face, frame),
                  FACE_BLINKING_P (face, frame),
                  FACE_DIM_P (face, frame),
                  FACE_UNDERLINE_P (face, frame),
                  FACE_REVERSE_P (face, frame),
                  FACE_FOREGROUND (face, frame),
                  FACE_BACKGROUND (face, frame));
}

/*****************************************************************************
 tty_turn_off_frame_face

 Turn off all set properties of the given face (revert to default
 face).  We assume that tty_turn_on_face has been called for the given
 face so that its properties are actually active.
 ****************************************************************************/
static void
tty_turn_off_frame_face (struct frame *f, Lisp_Object face)
{
  Lisp_Object frame;
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  XSETFRAME (frame, f);

  if (FACE_REVERSE_P (face, frame))
    {
      /* #### punt for now if standout mode is glitchy */
      if (!TTY_FLAGS (c).standout_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).end_standout);
      }
    }

  if (FACE_UNDERLINE_P (face, frame))
    {
      /* #### punt for now if underline mode is glitchy */
      if (!TTY_FLAGS (c).underline_width)
      {
        OUTPUT1_IF (c, TTY_SD (c).end_underline);
      }
    }

  if (FACE_HIGHLIGHT_P (face, frame) ||
      FACE_BLINKING_P (face, frame) ||
      FACE_DIM_P (face, frame) ||
      !EQ (FACE_FOREGROUND (face, frame), Vthe_null_color_instance) ||
      !EQ (FACE_BACKGROUND (face, frame), Vthe_null_color_instance))
    {
      OUTPUT1_IF (c, TTY_SD (c).turn_off_attributes);
    }
}

/*****************************************************************************
 set_tty_modes

 Sets up various parameters on tty modes.
 ****************************************************************************/
void
set_tty_modes (struct console *c)
{
  if (!CONSOLE_TTY_P (c))
    return;

  OUTPUT1_IF (c, TTY_SD (c).init_motion);
  OUTPUT1_IF (c, TTY_SD (c).cursor_visible);
  OUTPUT1_IF (c, TTY_SD (c).keypad_on);
}

/*****************************************************************************
 reset_tty_modes

 Restore default state of tty.
 ****************************************************************************/
void
reset_tty_modes (struct console *c)
{
  if (!CONSOLE_TTY_P (c))
    return;

  OUTPUT1_IF (c, TTY_SD (c).orig_pair);
  OUTPUT1_IF (c, TTY_SD (c).keypad_off);
  OUTPUT1_IF (c, TTY_SD (c).cursor_normal);
  OUTPUT1_IF (c, TTY_SD (c).end_motion);

  {
    Lisp_Object frm = CONSOLE_SELECTED_FRAME (c);

    if (!NILP (frm))
      tty_frame_output_end (XFRAME (frm));
  }
}

/*****************************************************************************
 tty_redisplay_shutdown

 Clear the frame and position the cursor properly for exiting.
 ****************************************************************************/
void
tty_redisplay_shutdown (struct console *c)
{
  Lisp_Object dev = CONSOLE_SELECTED_DEVICE (c);

  if (!NILP (dev))
    {
      Lisp_Object frm = DEVICE_SELECTED_FRAME (XDEVICE (dev));

      if (!NILP (frm))
      {
        struct frame *f = XFRAME (frm);

        /* Clear the bottom line of the frame. */
        redisplay_clear_region (FRAME_SELECTED_WINDOW (f), DEFAULT_INDEX, 0,
                      f->height, f->width, 1);

        /* And then stick the cursor there. */
        tty_set_final_cursor_coords (f, f->height, 0);
        tty_frame_output_end (f);
      }
    }
}


/* #### Everything below here is old shit.  It should either be moved
   up or removed. */


#ifdef NOT_YET
/* FLAGS - these don't need to be console local since only one console
         can be being updated at a time. */
static int insert_mode_on;          /* nonzero if in insert mode */
static int standout_mode_on;        /* nonzero if in standout mode */
static int underline_mode_on;       /* nonzero if in underline mode */
static int alternate_mode_on;       /* nonzero if in alternate char set */
static int attributes_on;           /* nonzero if any attributes on */

static void
turn_on_insert (struct frame *f)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  if (!insert_mode_on)
    OUTPUT1_IF (c, TTY_SE (c).begin_ins_mode);
  insert_mode_on = 1;
}

static void
turn_off_insert (struct frame *f)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  if (insert_mode_on)
    OUTPUT1 (c, TTY_SE (c).end_ins_mode);
  insert_mode_on = 0;
}

static void
internal_cursor_to (struct frame *f, int row, int col)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  if (!TTY_FLAGS (c).insert_mode_motion)
    turn_off_insert (f);
  if (!TTY_FLAGS (c).standout_motion)
    {
      turn_off_standout (f);
      turn_off_underline (f);
      turn_off_alternate (f);
    }

  cmgoto (f, row, col);
}

static void
clear_to_end (struct frame *f)
{
  struct console *c = XCONSOLE (FRAME_CONSOLE (f));

  /* assumes cursor is already positioned */
  if (TTY_SE (c).clr_from_cursor)
    {
      OUTPUT1 (c, TTY_SE (c).clr_from_cursor);
    }
  else
    {
      int line = FRAME_CURSOR_Y (f);

      while (line < FRAME_HEIGHT (f))
      {
        internal_cursor_to (f, line, 0);
        OUTPUT1 (c, TTY_SE (c).clr_to_eol);
      }
    }
}
#endif /* 0 */

#if 0
/*
 *  clear from last visible line on window to window end (presumably
 *  the line above window's modeline
 */
static void
tty_clear_window_end (struct window *w, int ystart, int yend)
{
  struct console *c = XCONSOLE (WINDOW_CONSOLE (w));
  int line;

  for (line = ystart; line < yend; line++)
    {
      cmgoto (XFRAME (w->frame), line, 0);
      OUTPUT1 (c, TTY_SE (c).clr_to_eol);
    }
}

#endif /* 0 */

static int
tty_flash (struct device *d)
{
  struct console *c = XCONSOLE (DEVICE_CONSOLE (d));
  if (TTY_SD (c).visual_bell)
    {
      OUTPUT1 (c, TTY_SD (c).visual_bell);
      Lstream_flush (XLSTREAM (CONSOLE_TTY_DATA (c)->outstream));
      return 1;
    }
  else
    return 0;
}

/*
 * tty_ring_bell - sound an audio beep.
 */
static void
tty_ring_bell (struct device *d, int volume, int pitch, int duration)
{
  struct console *c = XCONSOLE (DEVICE_CONSOLE (d));

  if (volume)
    {
      OUTPUT1 (c, TTY_SD (c).audio_bell);
      Lstream_flush (XLSTREAM (CONSOLE_TTY_DATA (c)->outstream));
    }
}


int
init_tty_for_redisplay (struct device *d, char *terminal_type)
{
  int status;
  char entry_buffer[2044];
  /* char temp_buffer[2044]; */
  char *bufptr;
  struct console *c = XCONSOLE (DEVICE_CONSOLE (d));

  /* What we should really do is allocate just enough space for
     the actual strings that are stored; but this would require
     doing this after all the tgetstr()s and adjusting all the
     pointers. */
  CONSOLE_TTY_DATA (c)->term_entry_buffer = (char *) xmalloc (2044);
  bufptr = CONSOLE_TTY_DATA (c)->term_entry_buffer;

#ifdef SIGTTOU
  /* SIGTT* don't exist under win32 */
  EMACS_BLOCK_SIGNAL (SIGTTOU);
#endif
  status = tgetent (entry_buffer, terminal_type);
#ifdef SIGTTOU
  EMACS_UNBLOCK_SIGNAL (SIGTTOU);
#endif
#if 0
  if (status < 0)
    return TTY_UNABLE_OPEN_DATABASE;
  else if (status == 0)
    return TTY_TYPE_UNDEFINED;
#endif
  /* Under Linux at least, <0 is returned for TTY_TYPE_UNDEFINED. --ben */
  if (status <= 0)
    return TTY_TYPE_UNDEFINED;

  /*
   * Establish the terminal size.
   */
  /* First try to get the info from the system.  If that fails, check
     the termcap entry. */
  get_tty_device_size (d, &CONSOLE_TTY_DATA (c)->width,
                   &CONSOLE_TTY_DATA (c)->height);

  if (CONSOLE_TTY_DATA (c)->width <= 0)
    CONSOLE_TTY_DATA (c)->width = tgetnum ("co");
  if (CONSOLE_TTY_DATA (c)->height <= 0)
    CONSOLE_TTY_DATA (c)->height = tgetnum ("li");

  if (CONSOLE_TTY_DATA (c)->width <= 0 || CONSOLE_TTY_DATA (c)->height <= 0)
    return TTY_SIZE_UNSPECIFIED;

  /*
   * Initialize cursor motion information.
   */

  /* local cursor movement */
  TTY_CM (c).up = tgetstr ("up", &bufptr);
  TTY_CM (c).down = tgetstr ("do", &bufptr);
  TTY_CM (c).left = tgetstr ("le", &bufptr);
  TTY_CM (c).right = tgetstr ("nd", &bufptr);
  TTY_CM (c).home = tgetstr ("ho", &bufptr);
  TTY_CM (c).low_left = tgetstr ("ll", &bufptr);
  TTY_CM (c).car_return = tgetstr ("cr", &bufptr);

  /* absolute cursor motion */
  TTY_CM (c).abs = tgetstr ("cm", &bufptr);
  TTY_CM (c).hor_abs = tgetstr ("ch", &bufptr);
  TTY_CM (c).ver_abs = tgetstr ("cv", &bufptr);

  /* Verify that the terminal is powerful enough to run Emacs */
  if (!TTY_CM (c).abs)
    {
      if (!TTY_CM (c).up || !TTY_CM (c).down
        || !TTY_CM (c).left || !TTY_CM (c).right)
      return TTY_TYPE_INSUFFICIENT;
    }

  /* parameterized local cursor movement */
  TTY_CM (c).multi_up = tgetstr ("UP", &bufptr);
  TTY_CM (c).multi_down = tgetstr ("DO", &bufptr);
  TTY_CM (c).multi_left = tgetstr ("LE", &bufptr);
  TTY_CM (c).multi_right = tgetstr ("RI", &bufptr);

  /* scrolling */
  TTY_CM (c).scroll_forw = tgetstr ("sf", &bufptr);
  TTY_CM (c).scroll_back = tgetstr ("sr", &bufptr);
  TTY_CM (c).multi_scroll_forw = tgetstr ("SF", &bufptr);
  TTY_CM (c).multi_scroll_back = tgetstr ("SR", &bufptr);
  TTY_CM (c).set_scroll_region = tgetstr ("cs", &bufptr);


  /*
   * Initialize screen editing information.
   */

  /* adding to the screen */
  TTY_SE (c).ins_line = tgetstr ("al", &bufptr);
  TTY_SE (c).multi_ins_line = tgetstr ("AL", &bufptr);
  TTY_SE (c).repeat = tgetstr ("rp", &bufptr);
  TTY_SE (c).begin_ins_mode = tgetstr ("im", &bufptr);
  TTY_SE (c).end_ins_mode = tgetstr ("ei", &bufptr);
  TTY_SE (c).ins_char = tgetstr ("ic", &bufptr);
  TTY_SE (c).multi_ins_char = tgetstr ("IC", &bufptr);
  TTY_SE (c).insert_pad = tgetstr ("ip", &bufptr);

  /* deleting from the screen */
  TTY_SE (c).clr_frame = tgetstr ("cl", &bufptr);
  TTY_SE (c).clr_from_cursor = tgetstr ("cd", &bufptr);
  TTY_SE (c).clr_to_eol = tgetstr ("ce", &bufptr);
  TTY_SE (c).del_line = tgetstr ("dl", &bufptr);
  TTY_SE (c).multi_del_line = tgetstr ("DL", &bufptr);
  TTY_SE (c).del_char = tgetstr ("dc", &bufptr);
  TTY_SE (c).multi_del_char = tgetstr ("DC", &bufptr);
  TTY_SE (c).begin_del_mode = tgetstr ("dm", &bufptr);
  TTY_SE (c).end_del_mode = tgetstr ("ed", &bufptr);
  TTY_SE (c).erase_at_cursor = tgetstr ("ec", &bufptr);


  /*
   * Initialize screen display information.
   */
  TTY_SD (c).begin_standout = tgetstr ("so", &bufptr);
  TTY_SD (c).end_standout = tgetstr ("se", &bufptr);
  TTY_SD (c).begin_underline = tgetstr ("us", &bufptr);
  TTY_SD (c).end_underline = tgetstr ("ue", &bufptr);
  TTY_SD (c).begin_alternate = tgetstr ("as", &bufptr);
  TTY_SD (c).end_alternate = tgetstr ("ae", &bufptr);
  TTY_SD (c).turn_on_reverse = tgetstr ("mr", &bufptr);
  TTY_SD (c).turn_on_blinking = tgetstr ("mb", &bufptr);
  TTY_SD (c).turn_on_bold = tgetstr ("md", &bufptr);
  TTY_SD (c).turn_on_dim = tgetstr ("mh", &bufptr);
  TTY_SD (c).turn_off_attributes = tgetstr ("me", &bufptr);
  TTY_SD (c).orig_pair = tgetstr ("op", &bufptr);

  TTY_SD (c).visual_bell = tgetstr ("vb", &bufptr);
  TTY_SD (c).audio_bell = tgetstr ("bl", &bufptr);
  if (!TTY_SD (c).audio_bell)
    {
      /* If audio_bell doesn't get set, then assume C-g.  This is gross and
         ugly but is what Emacs has done from time immortal. */
      TTY_SD (c).audio_bell = "\07";
    }

  TTY_SD (c).cursor_visible = tgetstr ("ve", &bufptr);
  TTY_SD (c).cursor_normal = tgetstr ("vs", &bufptr);
  TTY_SD (c).init_motion = tgetstr ("ti", &bufptr);
  TTY_SD (c).end_motion = tgetstr ("te", &bufptr);
  TTY_SD (c).keypad_on = tgetstr ("ks", &bufptr);
  TTY_SD (c).keypad_off = tgetstr ("ke", &bufptr);


  /*
   * Initialize additional terminal information.
   */
  TTY_FLAGS (c).must_write_spaces = tgetflag ("in");
  TTY_FLAGS (c).insert_mode_motion = tgetflag ("mi");
  TTY_FLAGS (c).standout_motion = tgetflag ("ms");
  TTY_FLAGS (c).memory_above_frame = tgetflag ("da");
  TTY_FLAGS (c).memory_below_frame = tgetflag ("db");
  TTY_FLAGS (c).standout_width = tgetnum ("sg");
  TTY_FLAGS (c).underline_width = tgetnum ("ug");

  if (TTY_FLAGS (c).standout_width == -1)
    TTY_FLAGS (c).standout_width = 0;
  if (TTY_FLAGS (c).underline_width == -1)
    TTY_FLAGS (c).underline_width = 0;

   TTY_FLAGS (c).meta_key =
     eight_bit_tty (d) ? tgetflag ("km") || tgetflag ("MT") ? 1 : 2 : 0;


  /*
   * Setup the costs tables for this tty console.
   */
  cm_cost_init (c);

#ifdef NOT_YET
  /*
   * Initialize local flags.
   */
  insert_mode_on = 0;
  standout_mode_on = 0;
  underline_mode_on = 0;
  alternate_mode_on = 0;
  attributes_on = 0;
#endif

  /*
   * Attempt to initialize the function_key_map to
   * some kind of sensible value
   */

  term_get_fkeys (c->function_key_map, &bufptr);

  {
    /* check for ANSI set-foreground and set-background strings,
       and assume color if so.

       #### we should support the other (non-ANSI) ways of specifying
       color, too. */
    char foobuf[500];
    char *fooptr = foobuf;
    if ((tgetstr ("AB", &fooptr) && tgetstr ("AF", &fooptr)) ||
        (tgetstr ("Sf", &fooptr) && tgetstr ("Sb", &fooptr)) ||
        ((tgetnum ("Co") > 0) && (tgetnum ("pa") > 0)))
      DEVICE_CLASS (d) = Qcolor;
    else
      DEVICE_CLASS (d) = Qmono;
  }

  return TTY_INIT_SUCCESS;
}

struct fkey_table
{
  const char *cap;
  const char *name;
};

  /* Termcap capability names that correspond directly to X keysyms.
     Some of these (marked "terminfo") aren't supplied by old-style
     (Berkeley) termcap entries.  They're listed in X keysym order;
     except we put the keypad keys first, so that if they clash with
     other keys (as on the IBM PC keyboard) they get overridden.
  */

static struct fkey_table keys[] =
{
  {"kh", "home"}, /* termcap */
  {"kl", "left"}, /* termcap */
  {"ku", "up"},         /* termcap */
  {"kr", "right"},      /* termcap */
  {"kd", "down"}, /* termcap */
  {"%8", "prior"},      /* terminfo */
  {"%5", "next"}, /* terminfo */
  {"@7", "end"},  /* terminfo */
  {"@1", "begin"},      /* terminfo */
  {"*6", "select"},     /* terminfo */
  {"%9", "print"},      /* terminfo */
  {"@4", "execute"},    /* terminfo --- actually the `command' key */
  /*
   * "insert" --- see below
   */
  {"&8", "undo"}, /* terminfo */
  {"%0", "redo"}, /* terminfo */
  {"%7", "menu"}, /* terminfo --- actually the `options' key */
  {"@0", "find"}, /* terminfo */
  {"@2", "cancel"},     /* terminfo */
  {"%1", "help"}, /* terminfo */
  /*
   * "break" goes here, but can't be reliably intercepted with termcap
   */
  {"&4", "reset"},      /* terminfo --- actually `restart' */
  /*
   * "system" and "user" --- no termcaps
   */
  {"kE", "clearline"},  /* terminfo */
  {"kA", "insertline"}, /* terminfo */
  {"kL", "deleteline"}, /* terminfo */
  {"kI", "insertchar"}, /* terminfo */
  {"kD", "delete"},     /* terminfo */
  {"kB", "backtab"},    /* terminfo */
  /*
   * "kp-backtab", "kp-space", "kp-tab" --- no termcaps
   */
  {"@8", "kp-enter"},   /* terminfo */
  /*
   * "kp-f1", "kp-f2", "kp-f3" "kp-f4",
   * "kp-multiply", "kp-add", "kp-separator",
   * "kp-subtract", "kp-decimal", "kp-divide", "kp-0";
   * --- no termcaps for any of these.
   */
  {"K4", "kp-1"}, /* terminfo */
  /*
   * "kp-2" --- no termcap
   */
  {"K5", "kp-3"}, /* terminfo */
  /*
   * "kp-4" --- no termcap
   */
  {"K2", "kp-5"}, /* terminfo */
  /*
   * "kp-6" --- no termcap
   */
  {"K1", "kp-7"}, /* terminfo */
  /*
   * "kp-8" --- no termcap
   */
  {"K3", "kp-9"}, /* terminfo */
  /*
   * "kp-equal" --- no termcap
   */
  {"k1", "f1"},
  {"k2", "f2"},
  {"k3", "f3"},
  {"k4", "f4"},
  {"k5", "f5"},
  {"k6", "f6"},
  {"k7", "f7"},
  {"k8", "f8"},
  {"k9", "f9"},
};

static char **term_get_fkeys_arg;

static Lisp_Object term_get_fkeys_1 (Lisp_Object keymap);
static Lisp_Object term_get_fkeys_error (Lisp_Object err, Lisp_Object arg);

/* Find the escape codes sent by the function keys for Vfunction_key_map.
   This function scans the termcap function key sequence entries, and
   adds entries to Vfunction_key_map for each function key it finds.  */

static void
term_get_fkeys (Lisp_Object keymap, char **address)
{
  /* We run the body of the function (term_get_fkeys_1) and ignore all Lisp
     errors during the call.  The only errors should be from Fdefine_key
     when given a key sequence containing an invalid prefix key.  If the
     termcap defines function keys which use a prefix that is already bound
     to a command by the default bindings, we should silently ignore that
     function key specification, rather than giving the user an error and
     refusing to run at all on such a terminal.  */

  term_get_fkeys_arg = address;

  condition_case_1 (Qerror,
                term_get_fkeys_1, keymap,
                term_get_fkeys_error, Qnil);
}

static Lisp_Object
term_get_fkeys_error (Lisp_Object err, Lisp_Object arg)
{
  return arg;
}

static Lisp_Object
term_get_fkeys_1 (Lisp_Object function_key_map)
{
  int i;

  char **address = term_get_fkeys_arg;

  for (i = 0; i < countof (keys); i++)
    {
      char *sequence = tgetstr (keys[i].cap, address);
      if (sequence)
      Fdefine_key (function_key_map,
                 build_ext_string (sequence, Qbinary),
                 vector1 (intern (keys[i].name)));
    }

  /* The uses of the "k0" capability are inconsistent; sometimes it
     describes F10, whereas othertimes it describes F0 and "k;" describes F10.
     We will attempt to politely accommodate both systems by testing for
     "k;", and if it is present, assuming that "k0" denotes F0, otherwise F10.
  */
  {
    const char *k_semi  = tgetstr ("k;", address);
    const char *k0      = tgetstr ("k0", address);

    if (k_semi)
      Fdefine_key (function_key_map, build_ext_string (k_semi, Qbinary),
               vector1 (intern ("f10")));

    if (k0)
      Fdefine_key (function_key_map, build_ext_string (k0, Qbinary),
               vector1 (intern (k_semi ? "f0" : "f10")));
  }

  /* Set up cookies for numbered function keys above f10. */
  {
    char fcap[3], fkey[4];

    fcap[0] = 'F'; fcap[2] = '\0';
    for (i = 11; i < 64; i++)
      {
      if (i <= 19)
        fcap[1] = '1' + i - 11;
      else if (i <= 45)
        fcap[1] = 'A' + i - 20;
      else
        fcap[1] = 'a' + i - 46;

      {
        char *sequence = tgetstr (fcap, address);
        if (sequence)
          {
            sprintf (fkey, "f%d", i);
            Fdefine_key (function_key_map,
                     build_ext_string (sequence, Qbinary),
                     vector1 (intern (fkey)));
          }
      }
      }
  }

  /*
   * Various mappings to try and get a better fit.
   */
#define CONDITIONAL_REASSIGN(cap1, cap2, keyname) do {            \
    if (!tgetstr (cap1, address))                     \
      {                                               \
      char *sequence = tgetstr (cap2, address);       \
      if (sequence)                                   \
        Fdefine_key (function_key_map,                \
                   build_ext_string (sequence, Qbinary),    \
                   vector1 (intern (keyname)));       \
      }                                               \
  } while (0)

  /* if there's no key_next keycap, map key_npage to `next' keysym */
  CONDITIONAL_REASSIGN ("%5", "kN", "next");
  /* if there's no key_prev keycap, map key_ppage to `previous' keysym */
  CONDITIONAL_REASSIGN ("%8", "kP", "prior");
  /* if there's no key_dc keycap, map key_ic to `insert' keysym */
  CONDITIONAL_REASSIGN ("kD", "kI", "insert");

  /* IBM has their own non-standard dialect of terminfo.
     If the standard name isn't found, try the IBM name.  */
  CONDITIONAL_REASSIGN ("kB", "KO", "backtab");
  CONDITIONAL_REASSIGN ("@4", "kJ", "execute"); /* actually "action" */
  CONDITIONAL_REASSIGN ("@4", "kc", "execute"); /* actually "command" */
  CONDITIONAL_REASSIGN ("%7", "ki", "menu");
  CONDITIONAL_REASSIGN ("@7", "kw", "end");
  CONDITIONAL_REASSIGN ("F1", "k<", "f11");
  CONDITIONAL_REASSIGN ("F2", "k>", "f12");
  CONDITIONAL_REASSIGN ("%1", "kq", "help");
  CONDITIONAL_REASSIGN ("*6", "kU", "select");
#undef CONDITIONAL_REASSIGN

  return Qnil;
}


/************************************************************************/
/*                            initialization                            */
/************************************************************************/

void
console_type_create_redisplay_tty (void)
{
  /* redisplay methods */
  CONSOLE_HAS_METHOD (tty, text_width);
  CONSOLE_HAS_METHOD (tty, output_display_block);
  CONSOLE_HAS_METHOD (tty, output_vertical_divider);
  CONSOLE_HAS_METHOD (tty, divider_height);
  CONSOLE_HAS_METHOD (tty, eol_cursor_width);
  CONSOLE_HAS_METHOD (tty, clear_to_window_end);
  CONSOLE_HAS_METHOD (tty, clear_region);
  CONSOLE_HAS_METHOD (tty, clear_frame);
  CONSOLE_HAS_METHOD (tty, frame_output_begin);
  CONSOLE_HAS_METHOD (tty, frame_output_end);
  CONSOLE_HAS_METHOD (tty, flash);
  CONSOLE_HAS_METHOD (tty, ring_bell);
  CONSOLE_HAS_METHOD (tty, set_final_cursor_coords);
}

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