(font-lock-make-faces): Add special code for ms-dos.

[bpt/emacs.git] / src / msdos.c

/* MS-DOS specific C utilities.
   Copyright (C) 1993, 1994 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs 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.

GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Contributed by Morten Welinder */
/* New display, keyboard, and mouse control by Kim F. Storm */

/* Note: some of the stuff here was taken from end of sysdep.c in demacs. */

#include <config.h>

#ifdef MSDOS
#include "lisp.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/time.h>
#include <dos.h>
#include "dosfns.h"
#include "msdos.h"
#include "systime.h"
#include "termhooks.h"
#include "dispextern.h"
#include "termopts.h"
#include "frame.h"
#include "window.h"
#include <go32.h>
#include <pc.h>
#include <ctype.h>
/* #include <process.h> */
/* Damn that local process.h!  Instead we can define P_WAIT ourselves.  */
#define P_WAIT 1


static unsigned long
event_timestamp ()
{
  struct time t;
  unsigned long s;
  
  gettime (&t);
  s = t.ti_min;
  s *= 60;
  s += t.ti_sec;
  s *= 1000;
  s += t.ti_hund * 10;
  
  return s;
}

\f
/* ------------------------ Mouse control ---------------------------
 *
 * Coordinates are in screen positions and zero based.
 * Mouse buttons are numbered from left to right and also zero based.
 */

int have_mouse;          /* 0: no, 1: enabled, -1: disabled */
static int mouse_visible;

static int mouse_last_x;
static int mouse_last_y;

static int mouse_button_translate[NUM_MOUSE_BUTTONS];
static int mouse_button_count;

void
mouse_on ()
{
  union REGS regs;

  if (have_mouse > 0 && !mouse_visible)
    {
      if (termscript)
	fprintf (termscript, "<M_ON>");
      regs.x.ax = 0x0001;
      int86 (0x33, &regs, &regs);
      mouse_visible = 1;
    }
}

void
mouse_off ()
{
  union REGS regs;

  if (have_mouse > 0 && mouse_visible)
    {
      if (termscript)
	fprintf (termscript, "<M_OFF>");
      regs.x.ax = 0x0002;
      int86 (0x33, &regs, &regs);
      mouse_visible = 0;
    }
}

void
mouse_moveto (x, y)
     int x, y;
{
  union REGS regs;

  if (termscript)
    fprintf (termscript, "<M_XY=%dx%d>", x, y);
  regs.x.ax = 0x0004;
  mouse_last_x = regs.x.cx = x * 8;
  mouse_last_y = regs.x.dx = y * 8;
  int86 (0x33, &regs, &regs);
}

static int
mouse_pressed (b, xp, yp)
     int b, *xp, *yp;
{
  union REGS regs;

  if (b >= mouse_button_count)
    return 0;
  regs.x.ax = 0x0005;
  regs.x.bx = mouse_button_translate[b];
  int86 (0x33, &regs, &regs);
  if (regs.x.bx)
    *xp = regs.x.cx / 8, *yp = regs.x.dx / 8;
  return (regs.x.bx != 0);
}

static int
mouse_released (b, xp, yp)
     int b, *xp, *yp;
{
  union REGS regs;

  if (b >= mouse_button_count)
    return 0;
  regs.x.ax = 0x0006;
  regs.x.bx = mouse_button_translate[b];
  int86 (0x33, &regs, &regs);
  if (regs.x.bx)
    *xp = regs.x.cx / 8, *yp = regs.x.dx / 8;
  return (regs.x.bx != 0);
}

static void
mouse_get_xy (int *x, int *y)
{
  union REGS regs;

  regs.x.ax = 0x0003;
  int86 (0x33, &regs, &regs);
  *x = regs.x.cx / 8;
  *y = regs.x.dx / 8;
}

void
mouse_get_pos (f, insist, bar_window, part, x, y, time)
     FRAME_PTR *f;
     int insist;
     Lisp_Object *bar_window, *x, *y;
     enum scroll_bar_part *part;
     unsigned long *time;
{
  int ix, iy;
  union REGS regs;

  regs.x.ax = 0x0003;
  int86 (0x33, &regs, &regs);
  *f = selected_frame;
  *bar_window = Qnil;
  mouse_get_xy (&ix, &iy);
  selected_frame->mouse_moved = 0;
  *x = make_number (ix);
  *y = make_number (iy);
  *time = event_timestamp ();
}

static void
mouse_check_moved ()
{
  int x, y;

  mouse_get_xy (&x, &y);
  selected_frame->mouse_moved |= (x != mouse_last_x || y != mouse_last_y);
  mouse_last_x = x;
  mouse_last_y = y;
}

void
mouse_init ()
{
  union REGS regs;

  if (termscript)
    fprintf (termscript, "<M_INIT>");

  regs.x.ax = 0x0021;
  int86 (0x33, &regs, &regs);

  regs.x.ax = 0x0007;
  regs.x.cx = 0;
  regs.x.dx = 8 * (ScreenCols () - 1);
  int86 (0x33, &regs, &regs);

  regs.x.ax = 0x0008;
  regs.x.cx = 0;
  regs.x.dx = 8 * (ScreenRows () - 1);
  int86 (0x33, &regs, &regs);

  mouse_moveto (0, 0);
  mouse_visible = 0;
}

/* ------------------------- Screen control ----------------------
 *
 */

static int internal_terminal = 0;

#ifndef HAVE_X_WINDOWS
extern unsigned char ScreenAttrib;
static int screen_face;
static int highlight;

static int screen_size_X;
static int screen_size_Y;
static int screen_size;

static int current_pos_X;
static int current_pos_Y;
static int new_pos_X;
static int new_pos_Y;

static void *startup_screen_buffer;
static int startup_screen_size_X;
static int startup_screen_size_Y;
static int startup_pos_X;
static int startup_pos_Y;

static int term_setup_done;

/* Similar to the_only_frame.  */
struct x_output the_only_x_display;

/* This is never dereferenced.  */
Display *x_current_display;


#define SCREEN_SET_CURSOR() 						\
  if (current_pos_X != new_pos_X || current_pos_Y != new_pos_Y) 	\
    ScreenSetCursor (current_pos_Y = new_pos_Y, current_pos_X = new_pos_X)

static
dos_direct_output (y, x, buf, len)
     int y;
     int x;
     char *buf;
     int len;
{
  int t = (int) ScreenPrimary + 2 * (x + y * screen_size_X);
  
  while (--len >= 0) {
    dosmemput (buf++, 1, t);
    t += 2;
  }
}
#endif

/* Flash the screen as a substitute for BEEPs.  */

#if (__DJGPP__ < 2)
static void
do_visible_bell (xorattr)
     unsigned char xorattr;
{
  asm volatile
    ("  movb   $1,%%dl
visible_bell_0:
	movl   _ScreenPrimary,%%eax
	call   dosmemsetup
	movl   %%eax,%%ebx
	movl   %1,%%ecx
	movb   %0,%%al
	incl   %%ebx
visible_bell_1:
	xorb   %%al,%%gs:(%%ebx)
	addl   $2,%%ebx
	decl   %%ecx
	jne    visible_bell_1
	decb   %%dl
	jne    visible_bell_3
visible_bell_2:
	movzwl %%ax,%%eax
        movzwl %%ax,%%eax
	movzwl %%ax,%%eax
	movzwl %%ax,%%eax
	decw   %%cx
	jne    visible_bell_2
	jmp    visible_bell_0
visible_bell_3:"
     : /* no output */
     : "m" (xorattr), "g" (screen_size)
     : "%eax", "%ebx", /* "%gs",*/ "%ecx", "%edx");
}

static void
ScreenVisualBell (void)
{
  /* This creates an xor-mask that will swap the default fore- and
     background colors.  */
  do_visible_bell (((the_only_x_display.foreground_pixel
		     ^ the_only_x_display.background_pixel)
		    * 0x11) & 0x7f);
}
#endif

#ifndef HAVE_X_WINDOWS

/*
 * If we write a character in the position where the mouse is,
 * the mouse cursor may need to be refreshed.
 */

static void
mouse_off_maybe ()
{
  int x, y;
  
  if (!mouse_visible)
    return;
  
  mouse_get_xy (&x, &y);
  if (y != new_pos_Y || x < new_pos_X)
    return;
  
  mouse_off ();
}

static
IT_ring_bell ()
{
  if (visible_bell)
    {
      mouse_off ();
      ScreenVisualBell ();
    }
  else
    {
      union REGS inregs, outregs;
      inregs.h.ah = 2;
      inregs.h.dl = 7;
      intdos (&inregs, &outregs);
    }
}

static void
IT_set_face (int face)
{
  struct face *fp;
  extern struct face *intern_face (/* FRAME_PTR, struct face * */);

  if (face == 1 || (face == 0 && highlight))
    fp = FRAME_MODE_LINE_FACE (foo);
  else if (face <= 0 || face >= FRAME_N_COMPUTED_FACES (foo))
    fp = FRAME_DEFAULT_FACE (foo);
  else
    fp = intern_face (selected_frame, FRAME_COMPUTED_FACES (foo)[face]);
  if (termscript)
    fprintf (termscript, "<FACE:%d:%d>", FACE_FOREGROUND (fp), FACE_BACKGROUND (fp));
  screen_face = face;
  ScreenAttrib = (FACE_BACKGROUND (fp) << 4) | FACE_FOREGROUND (fp);
}

static
IT_write_glyphs (GLYPH *str, int len)
{
  int newface;
  int ch, l = len;
  unsigned char *buf, *bp;

  if (len == 0) return;
  
  buf = bp = alloca (len * 2);
  
  while (--l >= 0)
    {
      newface = FAST_GLYPH_FACE (*str);
      if (newface != screen_face)
	IT_set_face (newface);
      ch = FAST_GLYPH_CHAR (*str);
      *bp++ = (unsigned char)ch;
      *bp++ = ScreenAttrib;
      
      if (termscript)
	fputc (ch, termscript);
      str++;
    }

  mouse_off_maybe ();
  dosmemput (buf, 2 * len, 
	     (int)ScreenPrimary + 2 * (new_pos_X + screen_size_X * new_pos_Y));
  new_pos_X += len;
}

static
IT_clear_end_of_line (first_unused)
{
  char *spaces, *sp;
  int i, j;

  IT_set_face (0);
  if (termscript)
    fprintf (termscript, "<CLR:EOL>");
  i = (j = screen_size_X - new_pos_X) * 2;
  spaces = sp = alloca (i);
  
  while (--j >= 0)
    {
      *sp++ = ' ';
      *sp++ = ScreenAttrib;
    }

  mouse_off_maybe ();
  dosmemput (spaces, i, 
	     (int)ScreenPrimary + 2 * (new_pos_X + screen_size_X * new_pos_Y));
}

static
IT_clear_screen (void)
{
  if (termscript)
    fprintf (termscript, "<CLR:SCR>");
  IT_set_face (0);
  mouse_off ();
  ScreenClear ();
  new_pos_X = new_pos_Y = 0;
}

static
IT_clear_to_end (void)
{
  if (termscript)
    fprintf (termscript, "<CLR:EOS>");

  while (new_pos_Y < screen_size_Y) {
    new_pos_X = 0;
    IT_clear_end_of_line (0);
    new_pos_Y++;
  }
}

static
IT_cursor_to (int y, int x)
{
  if (termscript)
    fprintf (termscript, "\n<XY=%dx%d>", x, y);
  new_pos_X = x;
  new_pos_Y = y;
}

static
IT_reassert_line_highlight (new, vpos)
     int new, vpos;
{
  highlight = new;
  IT_set_face (0); /* To possibly clear the highlighting.  */
}

static
IT_change_line_highlight (new_highlight, vpos, first_unused_hpos)
{
  highlight = new_highlight;
  IT_set_face (0); /* To possibly clear the highlighting.  */
  IT_cursor_to (vpos, 0);
  IT_clear_end_of_line (first_unused_hpos);
}

static
IT_update_begin ()
{
  highlight = 0;
  IT_set_face (0); /* To possibly clear the highlighting.  */
  screen_face = -1;
}

static
IT_update_end ()
{
}

/* This was more or less copied from xterm.c */
static void
IT_set_menu_bar_lines (window, n)
  Lisp_Object window;
  int n;
{
  struct window *w = XWINDOW (window);

  XSETFASTINT (w->top, XFASTINT (w->top) + n);
  XSETFASTINT (w->height, XFASTINT (w->height) - n);

  /* Handle just the top child in a vertical split.  */
  if (!NILP (w->vchild))
    IT_set_menu_bar_lines (w->vchild, n);

  /* Adjust all children in a horizontal split.  */
  for (window = w->hchild; !NILP (window); window = w->next)
    {
      w = XWINDOW (window);
      IT_set_menu_bar_lines (window, n);
    }
}

/*
 * IT_set_terminal_modes is called when emacs is started,
 * resumed, and whenever the screen is redrawn!
 */

static
IT_set_terminal_modes (void)
{
  char *colors;
  FRAME_PTR f;
  struct face *fp;

  if (termscript)
    fprintf (termscript, "\n<SET_TERM>");
  highlight = 0;

  screen_size_X = ScreenCols ();
  screen_size_Y = ScreenRows ();
  screen_size = screen_size_X * screen_size_Y;
  
  new_pos_X = new_pos_Y = 0;
  current_pos_X = current_pos_Y = -1;

  if (term_setup_done)
    return;
  term_setup_done = 1;
  
  startup_screen_size_X = screen_size_X;
  startup_screen_size_Y = screen_size_Y;

  ScreenGetCursor (&startup_pos_Y, &startup_pos_X);
  ScreenRetrieve (startup_screen_buffer = xmalloc (screen_size * 2));

  if (termscript)
    fprintf (termscript, "<SCREEN SAVED>\n");
}

/*
 * IT_reset_terminal_modes is called when emacs is
 * suspended or killed.
 */

static
IT_reset_terminal_modes (void)
{
  if (termscript)
    fprintf (termscript, "\n<RESET_TERM>");

  highlight = 0;

  if (!term_setup_done)
    return;
  
  ScreenUpdate (startup_screen_buffer);
  ScreenSetCursor (startup_pos_Y, startup_pos_X);
  xfree (startup_screen_buffer);

  if (termscript)
    fprintf (termscript, "<SCREEN RESTORED>\n");

  term_setup_done = 0;
}

static
IT_set_terminal_window (void)
{
}

void
IT_set_frame_parameters (frame, alist)
     FRAME_PTR frame;
     Lisp_Object alist;
{
  Lisp_Object tail;
  int redraw;
  extern unsigned long load_color ();
  FRAME_PTR f = (FRAME_PTR) &the_only_frame;

  redraw = 0;
  for (tail = alist; CONSP (tail); tail = Fcdr (tail))
    {
      Lisp_Object elt, prop, val;

      elt = Fcar (tail);
      prop = Fcar (elt);
      val = Fcdr (elt);
      CHECK_SYMBOL (prop, 1);

      if (EQ (prop, intern ("foreground-color")))
	{
	  unsigned long new_color = load_color (f, val);
	  if (new_color != ~0)
	    {
	      FRAME_FOREGROUND_PIXEL (f) = new_color;
	      redraw = 1;
	    }
	}
      else if (EQ (prop, intern ("background-color")))
	{
	  unsigned long new_color = load_color (f, val);
	  if (new_color != ~0)
	    {
	      FRAME_BACKGROUND_PIXEL (f) = new_color & ~8;
	      redraw = 1;
	    }
	}
      else if (EQ (prop, intern ("menu-bar-lines")))
	{
	  int new;
	  int old = FRAME_MENU_BAR_LINES (the_only_frame);

	  if (INTEGERP (val))
	    new = XINT (val);
	  else
	    new = 0;
	  FRAME_MENU_BAR_LINES (f) = new;
	  IT_set_menu_bar_lines (the_only_frame.root_window, new - old);
	}
    }

  if (redraw)
    {
      recompute_basic_faces (f);
      Fredraw_frame (Fselected_frame ());
    }
}

#endif /* !HAVE_X_WINDOWS */


/* Do we need the internal terminal? */
void
internal_terminal_init ()
{
  char *term = getenv ("TERM");
  char *colors;

#ifdef HAVE_X_WINDOWS
  if (!inhibit_window_system)
    return;
#endif

  internal_terminal
    = (!noninteractive) && term && !strcmp (term, "internal");

  if (getenv ("EMACSTEST"))
    termscript = fopen (getenv ("EMACSTEST"), "wt");
  
#ifndef HAVE_X_WINDOWS
  if (!internal_terminal || inhibit_window_system)
    {
      the_only_frame.output_method = output_termcap;
      return;
    }

  Vwindow_system = intern ("pc");
  Vwindow_system_version = make_number (1);
 
  bzero (&the_only_x_display, sizeof the_only_x_display);
  the_only_x_display.background_pixel = 7; /* White */
  the_only_x_display.foreground_pixel = 0; /* Black */
  colors = getenv ("EMACSCOLORS");
  if (colors && strlen (colors) >= 2)
    {
      the_only_x_display.foreground_pixel = colors[0] & 0x07;
      the_only_x_display.background_pixel = colors[1] & 0x07;
    }
  the_only_x_display.line_height = 1;
  the_only_frame.output_data.x = &the_only_x_display;
  the_only_frame.output_method = output_msdos_raw;
  the_only_x_display.font = (XFontStruct *)1;   /* must *not* be zero */

  init_frame_faces ((FRAME_PTR) &the_only_frame);

  ring_bell_hook = IT_ring_bell;
  write_glyphs_hook = IT_write_glyphs;
  cursor_to_hook = raw_cursor_to_hook = IT_cursor_to;
  clear_to_end_hook = IT_clear_to_end;
  clear_end_of_line_hook = IT_clear_end_of_line;
  clear_frame_hook = IT_clear_screen;
  change_line_highlight_hook = IT_change_line_highlight;
  update_begin_hook = IT_update_begin;
  update_end_hook = IT_update_end;
  reassert_line_highlight_hook = IT_reassert_line_highlight;

  /* These hooks are called by term.c without being checked.  */
  set_terminal_modes_hook = IT_set_terminal_modes;
  reset_terminal_modes_hook = IT_reset_terminal_modes;
  set_terminal_window_hook = IT_set_terminal_window;
#endif
}

dos_get_saved_screen (screen, rows, cols)
     char **screen;
     int *rows;
     int *cols;
{
#ifndef HAVE_X_WINDOWS
  *screen = startup_screen_buffer;
  *cols = startup_screen_size_X;
  *rows = startup_screen_size_Y;
  return 1;
#else
  return 0;
#endif  
}


\f
/* ----------------------- Keyboard control ----------------------
 *
 * Keymaps reflect the following keyboard layout:
 *
 *    0  1  2  3  4  5  6  7  8  9  10 11 12  BS
 *    TAB 15 16 17 18 19 20 21 22 23 24 25 26 (41)
 *    CLOK 30 31 32 33 34 35 36 37 38 39 40 (41) RET
 *    SH () 45 46 47 48 49 50 51 52 53 54  SHIFT
 *                    SPACE
 */

static int extended_kbd; /* 101 (102) keyboard present.	*/

struct dos_keyboard_map
{
  char *unshifted;
  char *shifted;
  char *alt_gr;
};


static struct dos_keyboard_map us_keyboard = {
/* 0         1         2         3         4         5      */
/* 01234567890123456789012345678901234567890 12345678901234 */
  "`1234567890-=  qwertyuiop[]   asdfghjkl;'\\   zxcvbnm,./  ",
/* 0123456789012345678901234567890123456789 012345678901234 */
  "~!@#$%^&*()_+  QWERTYUIOP{}   ASDFGHJKL:\"|   ZXCVBNM<>?  ",
  0				/* no Alt-Gr key */
};

static struct dos_keyboard_map fr_keyboard = {
/* 0         1         2         3         4         5      */
/* 012 3456789012345678901234567890123456789012345678901234 */