src/w32console.c

   1 /* Terminal hooks for GNU Emacs on the Microsoft W32 API.
   2    Copyright (C) 1992, 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.
  20
  21    Tim Fleehart (apollo@online.com)             1-17-92
  22    Geoff Voelker (voelker@cs.washington.edu)    9-12-93
  23 */
  24
  25
  26 #include <config.h>
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <windows.h>
  31 #include <string.h>
  32
  33 #include "lisp.h"
  34 #include "charset.h"
  35 #include "coding.h"
  36 #include "disptab.h"
  37 #include "termhooks.h"
  38 #include "dispextern.h"
  39 /* Disable features in frame.h that require a Window System.  */
  40 #undef HAVE_WINDOW_SYSTEM
  41 #include "frame.h"
  42 #include "w32inevt.h"
  43
  44 /* from window.c */
  45 extern Lisp_Object Frecenter ();
  46
  47 /* from keyboard.c */
  48 extern int detect_input_pending ();
  49
  50 /* from sysdep.c */
  51 extern int read_input_pending ();
  52
  53 extern struct frame * updating_frame;
  54 extern int meta_key;
  55
  56 static void move_cursor (int row, int col);
  57 static void clear_to_end (void);
  58 static void clear_frame (void);
  59 static void clear_end_of_line (int);
  60 static void ins_del_lines (int vpos, int n);
  61 static void insert_glyphs (struct glyph *start, int len);
  62 static void write_glyphs (struct glyph *string, int len);
  63 static void delete_glyphs (int n);
  64 void w32_sys_ring_bell (void);
  65 static void reset_terminal_modes (void);
  66 static void set_terminal_modes (void);
  67 static void set_terminal_window (int size);
  68 static void update_begin (struct frame * f);
  69 static void update_end (struct frame * f);
  70 static WORD w32_face_attributes (struct frame *f, int face_id);
  71
  72 static COORD    cursor_coords;
  73 static HANDLE   prev_screen, cur_screen;
  74 static WORD     char_attr_normal;
  75 static DWORD   prev_console_mode;
  76
  77 #ifndef USE_SEPARATE_SCREEN
  78 static CONSOLE_CURSOR_INFO prev_console_cursor;
  79 #endif
  80
  81 /* Determine whether to make frame dimensions match the screen buffer,
  82    or the current window size.  The former is desirable when running
  83    over telnet, while the latter is more useful when working directly at
  84    the console with a large scroll-back buffer.  */
  85 int w32_use_full_screen_buffer;
  86 HANDLE  keyboard_handle;
  87
  88
  89 /* Setting this as the ctrl handler prevents emacs from being killed when
  90    someone hits ^C in a 'suspended' session (child shell).
  91    Also ignore Ctrl-Break signals.  */
  92
  93 BOOL
  94 ctrl_c_handler (unsigned long type)
  95 {
  96   /* Only ignore "interrupt" events when running interactively.  */
  97   return (!noninteractive
  98           && (type == CTRL_C_EVENT || type == CTRL_BREAK_EVENT));
  99 }
 100
 101 /* If we're updating a frame, use it as the current frame
 102    Otherwise, use the selected frame.  */
 103 #define PICK_FRAME() (updating_frame ? updating_frame : SELECTED_FRAME ())
 104
 105 /* Move the cursor to (row, col).  */
 106 void
 107 move_cursor (int row, int col)
 108 {
 109   cursor_coords.X = col;
 110   cursor_coords.Y = row;
 111
 112   if (updating_frame == (struct frame *) NULL)
 113     {
 114       SetConsoleCursorPosition (cur_screen, cursor_coords);
 115     }
 116 }
 117
 118 /* Clear from cursor to end of screen.  */
 119 void
 120 clear_to_end (void)
 121 {
 122   struct frame * f = PICK_FRAME ();
 123
 124   clear_end_of_line (FRAME_COLS (f) - 1);
 125   ins_del_lines (cursor_coords.Y, FRAME_LINES (f) - cursor_coords.Y - 1);
 126 }
 127
 128 /* Clear the frame.  */
 129 void
 130 clear_frame (void)
 131 {
 132   struct frame *  f = PICK_FRAME ();
 133   COORD      dest;
 134   int        n;
 135   DWORD      r;
 136   CONSOLE_SCREEN_BUFFER_INFO info;
 137
 138   GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info);
 139
 140   /* Remember that the screen buffer might be wider than the window.  */
 141   n = FRAME_LINES (f) * info.dwSize.X;
 142   dest.X = dest.Y = 0;
 143
 144   FillConsoleOutputAttribute (cur_screen, char_attr_normal, n, dest, &r);
 145   FillConsoleOutputCharacter (cur_screen, ' ', n, dest, &r);
 146
 147   move_cursor (0, 0);
 148 }
 149
 150
 151 static struct glyph glyph_base[256];
 152 static BOOL  ceol_initialized = FALSE;
 153
 154 /* Clear from Cursor to end (what's "standout marker"?).  */
 155 void
 156 clear_end_of_line (int end)
 157 {
 158   if (!ceol_initialized)
 159     {
 160       int i;
 161       for (i = 0; i < 256; i++)
 162         {
 163           memcpy (&glyph_base[i], &space_glyph, sizeof (struct glyph));
 164         }
 165       ceol_initialized = TRUE;
 166     }
 167   write_glyphs (glyph_base, end - cursor_coords.X);     /* fencepost ?  */
 168 }
 169
 170 /* Insert n lines at vpos. if n is negative delete -n lines.  */
 171 void
 172 ins_del_lines (int vpos, int n)
 173 {
 174   int        i, nb;
 175   SMALL_RECT scroll;
 176   COORD      dest;
 177   CHAR_INFO  fill;
 178   struct frame *  f = PICK_FRAME ();
 179
 180   if (n < 0)
 181     {
 182       scroll.Top = vpos - n;
 183       scroll.Bottom = FRAME_LINES (f);
 184       dest.Y = vpos;
 185     }
 186   else
 187     {
 188       scroll.Top = vpos;
 189       scroll.Bottom = FRAME_LINES (f) - n;
 190       dest.Y = vpos + n;
 191     }
 192   scroll.Left = 0;
 193   scroll.Right = FRAME_COLS (f);
 194
 195   dest.X = 0;
 196
 197   fill.Char.AsciiChar = 0x20;
 198   fill.Attributes = char_attr_normal;
 199
 200   ScrollConsoleScreenBuffer (cur_screen, &scroll, NULL, dest, &fill);
 201
 202   /* Here we have to deal with a w32 console flake: If the scroll
 203      region looks like abc and we scroll c to a and fill with d we get
 204      cbd... if we scroll block c one line at a time to a, we get cdd...
 205      Emacs expects cdd consistently... So we have to deal with that
 206      here... (this also occurs scrolling the same way in the other
 207      direction.  */
 208
 209   if (n > 0)
 210     {
 211       if (scroll.Bottom < dest.Y)
 212         {
 213           for (i = scroll.Bottom; i < dest.Y; i++)
 214             {
 215               move_cursor (i, 0);
 216               clear_end_of_line (FRAME_COLS (f));
 217             }
 218         }
 219     }
 220   else
 221     {
 222       nb = dest.Y + (scroll.Bottom - scroll.Top) + 1;
 223
 224       if (nb < scroll.Top)
 225         {
 226           for (i = nb; i < scroll.Top; i++)
 227             {
 228               move_cursor (i, 0);
 229               clear_end_of_line (FRAME_COLS (f));
 230             }
 231         }
 232     }
 233
 234   cursor_coords.X = 0;
 235   cursor_coords.Y = vpos;
 236 }
 237
 238 #undef  LEFT
 239 #undef  RIGHT
 240 #define LEFT    1
 241 #define RIGHT   0
 242
 243 void
 244 scroll_line (int dist, int direction)
 245 {
 246   /* The idea here is to implement a horizontal scroll in one line to
 247      implement delete and half of insert.  */
 248   SMALL_RECT scroll;
 249   COORD      dest;
 250   CHAR_INFO  fill;
 251   struct frame *  f = PICK_FRAME ();
 252
 253   scroll.Top = cursor_coords.Y;
 254   scroll.Bottom = cursor_coords.Y;
 255
 256   if (direction == LEFT)
 257     {
 258       scroll.Left = cursor_coords.X + dist;
 259       scroll.Right = FRAME_COLS (f) - 1;
 260     }
 261   else
 262     {
 263       scroll.Left = cursor_coords.X;
 264       scroll.Right = FRAME_COLS (f) - dist - 1;
 265     }
 266
 267   dest.X = cursor_coords.X;
 268   dest.Y = cursor_coords.Y;
 269
 270   fill.Char.AsciiChar = 0x20;
 271   fill.Attributes = char_attr_normal;
 272
 273   ScrollConsoleScreenBuffer (cur_screen, &scroll, NULL, dest, &fill);
 274 }
 275
 276
 277 /* If start is zero insert blanks instead of a string at start ?. */
 278 void
 279 insert_glyphs (register struct glyph *start, register int len)
 280 {
 281   scroll_line (len, RIGHT);
 282
 283   /* Move len chars to the right starting at cursor_coords, fill with blanks */
 284   if (start)
 285     {
 286       /* Print the first len characters of start, cursor_coords.X adjusted
 287          by write_glyphs.  */
 288
 289       write_glyphs (start, len);
 290     }
 291   else
 292     {
 293       clear_end_of_line (cursor_coords.X + len);
 294     }
 295 }
 296
 297 void
 298 write_glyphs (register struct glyph *string, register int len)
 299 {
 300   int produced, consumed;
 301   DWORD r;
 302   struct frame * f = PICK_FRAME ();
 303   WORD char_attr;
 304   unsigned char conversion_buffer[1024];
 305   int conversion_buffer_size = sizeof conversion_buffer;
 306
 307   if (len <= 0)
 308     return;
 309
 310   /* The mode bit CODING_MODE_LAST_BLOCK should be set to 1 only at
 311      the tail.  */
 312   terminal_coding.mode &= ~CODING_MODE_LAST_BLOCK;
 313
 314   while (len > 0)
 315     {
 316       /* Identify a run of glyphs with the same face.  */
 317       int face_id = string->face_id;
 318       int n;
 319
 320       for (n = 1; n < len; ++n)
 321         if (string[n].face_id != face_id)
 322           break;
 323
 324       /* Turn appearance modes of the face of the run on.  */
 325       char_attr = w32_face_attributes (f, face_id);
 326
 327       while (n > 0)
 328         {
 329           /* We use a fixed size (1024 bytes) of conversion buffer.
 330              Usually it is sufficient, but if not, we just repeat the
 331              loop.  */
 332           produced = encode_terminal_code (string, conversion_buffer,
 333                                            n, conversion_buffer_size,
 334                                            &consumed);
 335           if (produced > 0)
 336             {
 337               /* Set the attribute for these characters.  */
 338               if (!FillConsoleOutputAttribute (cur_screen, char_attr,
 339                                                produced, cursor_coords, &r))
 340                 {
 341                   printf ("Failed writing console attributes: %d\n",
 342                           GetLastError ());
 343                   fflush (stdout);
 344                 }
 345
 346               /* Write the characters.  */
 347               if (!WriteConsoleOutputCharacter (cur_screen, conversion_buffer,
 348                                                 produced, cursor_coords, &r))
 349                 {
 350                   printf ("Failed writing console characters: %d\n",
 351                           GetLastError ());
 352                   fflush (stdout);
 353                 }
 354
 355               cursor_coords.X += produced;
 356               move_cursor (cursor_coords.Y, cursor_coords.X);
 357             }
 358           len -= consumed;
 359           n -= consumed;
 360           string += consumed;
 361         }
 362     }
 363
 364   /* We may have to output some codes to terminate the writing.  */
 365   if (CODING_REQUIRE_FLUSHING (&terminal_coding))
 366     {
 367       terminal_coding.mode |= CODING_MODE_LAST_BLOCK;
 368       encode_coding (&terminal_coding, "", conversion_buffer,
 369                      0, conversion_buffer_size);
 370       if (terminal_coding.produced > 0)
 371         {
 372           if (!FillConsoleOutputAttribute (cur_screen, char_attr_normal,
 373                                            terminal_coding.produced,
 374                                            cursor_coords, &r))
 375             {
 376               printf ("Failed writing console attributes: %d\n",
 377                       GetLastError ());
 378               fflush (stdout);
 379             }
 380
 381           /* Write the characters.  */
 382           if (!WriteConsoleOutputCharacter (cur_screen, conversion_buffer,
 383                                             produced, cursor_coords, &r))
 384             {
 385               printf ("Failed writing console characters: %d\n",
 386                       GetLastError ());
 387               fflush (stdout);
 388             }
 389         }
 390     }
 391 }
 392
 393
 394 void
 395 delete_glyphs (int n)
 396 {
 397   /* delete chars means scroll chars from cursor_coords.X + n to
 398      cursor_coords.X, anything beyond the edge of the screen should
 399      come out empty...  */
 400
 401   scroll_line (n, LEFT);
 402 }
 403
 404 static unsigned int sound_type = 0xFFFFFFFF;
 405 #define MB_EMACS_SILENT (0xFFFFFFFF - 1)
 406
 407 void
 408 w32_sys_ring_bell (void)
 409 {
 410   if (sound_type == 0xFFFFFFFF)
 411     {
 412       Beep (666, 100);
 413     }
 414   else if (sound_type == MB_EMACS_SILENT)
 415     {
 416       /* Do nothing.  */
 417     }
 418   else
 419     MessageBeep (sound_type);
 420 }
 421
 422 DEFUN ("set-message-beep", Fset_message_beep, Sset_message_beep, 1, 1, 0,
 423        doc: /* Set the sound generated when the bell is rung.
 424 SOUND is 'asterisk, 'exclamation, 'hand, 'question, 'ok, or 'silent
 425 to use the corresponding system sound for the bell.  The 'silent sound
 426 prevents Emacs from making any sound at all.
 427 SOUND is nil to use the normal beep.  */)
 428      (sound)
 429      Lisp_Object sound;
 430 {
 431   CHECK_SYMBOL (sound);
 432
 433   if (NILP (sound))
 434       sound_type = 0xFFFFFFFF;
 435   else if (EQ (sound, intern ("asterisk")))
 436       sound_type = MB_ICONASTERISK;
 437   else if (EQ (sound, intern ("exclamation")))
 438       sound_type = MB_ICONEXCLAMATION;
 439   else if (EQ (sound, intern ("hand")))
 440       sound_type = MB_ICONHAND;
 441   else if (EQ (sound, intern ("question")))
 442       sound_type = MB_ICONQUESTION;
 443   else if (EQ (sound, intern ("ok")))
 444       sound_type = MB_OK;
 445   else if (EQ (sound, intern ("silent")))
 446       sound_type = MB_EMACS_SILENT;
 447   else
 448       sound_type = 0xFFFFFFFF;
 449
 450   return sound;
 451 }
 452
 453 void
 454 reset_terminal_modes (void)
 455 {
 456 #ifdef USE_SEPARATE_SCREEN
 457   SetConsoleActiveScreenBuffer (prev_screen);
 458 #else
 459   SetConsoleCursorInfo (prev_screen, &prev_console_cursor);
 460 #endif
 461   SetConsoleMode (keyboard_handle, prev_console_mode);
 462 }
 463
 464 void
 465 set_terminal_modes (void)
 466 {
 467   CONSOLE_CURSOR_INFO cci;
 468
 469   /* make cursor big and visible (100 on Win95 makes it disappear)  */
 470   cci.dwSize = 99;
 471   cci.bVisible = TRUE;
 472   (void) SetConsoleCursorInfo (cur_screen, &cci);
 473
 474   SetConsoleActiveScreenBuffer (cur_screen);
 475
 476   SetConsoleMode (keyboard_handle, ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT);
 477
 478   /* Initialize input mode: interrupt_input off, no flow control, allow
 479      8 bit character input, standard quit char.  */
 480   Fset_input_mode (Qnil, Qnil, make_number (2), Qnil);
 481 }
 482
 483 /* hmmm... perhaps these let us bracket screen changes so that we can flush
 484    clumps rather than one-character-at-a-time...
 485
 486    we'll start with not moving the cursor while an update is in progress.  */
 487 void
 488 update_begin (struct frame * f)
 489 {
 490 }
 491
 492 void
 493 update_end (struct frame * f)
 494 {
 495   SetConsoleCursorPosition (cur_screen, cursor_coords);
 496 }
 497
 498 void
 499 set_terminal_window (int size)
 500 {
 501 }
 502
 503 /***********************************************************************
 504                                 Faces
 505  ***********************************************************************/
 506
 507
 508 /* Turn appearances of face FACE_ID on tty frame F on.  */
 509
 510 static WORD
 511 w32_face_attributes (f, face_id)
 512      struct frame *f;
 513      int face_id;
 514 {
 515   WORD char_attr;
 516   struct face *face = FACE_FROM_ID (f, face_id);
 517
 518   xassert (face != NULL);
 519
 520   char_attr = char_attr_normal;
 521
 522   if (face->foreground != FACE_TTY_DEFAULT_FG_COLOR
 523       && face->foreground != FACE_TTY_DEFAULT_COLOR)
 524     char_attr = (char_attr & 0xfff0) + (face->foreground % 16);
 525
 526   if (face->background != FACE_TTY_DEFAULT_BG_COLOR
 527       && face->background != FACE_TTY_DEFAULT_COLOR)
 528     char_attr = (char_attr & 0xff0f) + ((face->background % 16) << 4);
 529
 530
 531   /* NTEMACS_TODO: Faces defined during startup get both foreground
 532      and background of 0. Need a better way around this - for now detect
 533      the problem and invert one of the faces to make the text readable. */
 534   if (((char_attr & 0x00f0) >> 4) == (char_attr & 0x000f))
 535     char_attr ^= 0x0007;
 536
 537   if (face->tty_reverse_p)
 538     char_attr = (char_attr & 0xff00) + ((char_attr & 0x000f) << 4)
 539       + ((char_attr & 0x00f0) >> 4);
 540
 541   return char_attr;
 542 }
 543
 544
 545 /* Emulation of some X window features from xfns.c and xfaces.c.  */
 546
 547 extern char unspecified_fg[], unspecified_bg[];
 548
 549
 550 /* Given a color index, return its standard name.  */
 551 Lisp_Object
 552 vga_stdcolor_name (int idx)
 553 {
 554   /* Standard VGA colors, in the order of their standard numbering
 555      in the default VGA palette.  */
 556   static char *vga_colors[16] = {
 557     "black", "blue", "green", "cyan", "red", "magenta", "brown",
 558     "lightgray", "darkgray", "lightblue", "lightgreen", "lightcyan",
 559     "lightred", "lightmagenta", "yellow", "white"
 560   };
 561
 562   extern Lisp_Object Qunspecified;
 563
 564   if (idx >= 0 && idx < sizeof (vga_colors) / sizeof (vga_colors[0]))
 565     return build_string (vga_colors[idx]);
 566   else
 567     return Qunspecified;        /* meaning the default */
 568 }
 569
 570 typedef int (*term_hook) ();
 571
 572 void
 573 initialize_w32_display (void)
 574 {
 575   CONSOLE_SCREEN_BUFFER_INFO    info;
 576
 577   cursor_to_hook                = move_cursor;
 578   raw_cursor_to_hook            = move_cursor;
 579   clear_to_end_hook             = clear_to_end;
 580   clear_frame_hook              = clear_frame;
 581   clear_end_of_line_hook        = clear_end_of_line;
 582   ins_del_lines_hook            = ins_del_lines;
 583   insert_glyphs_hook            = insert_glyphs;
 584   write_glyphs_hook             = write_glyphs;
 585   delete_glyphs_hook            = delete_glyphs;
 586   ring_bell_hook                = w32_sys_ring_bell;
 587   reset_terminal_modes_hook     = reset_terminal_modes;
 588   set_terminal_modes_hook       = set_terminal_modes;
 589   set_terminal_window_hook      = set_terminal_window;
 590   update_begin_hook             = update_begin;
 591   update_end_hook               = update_end;
 592
 593   read_socket_hook = w32_console_read_socket;
 594   mouse_position_hook = w32_console_mouse_position;
 595
 596   /* Initialize interrupt_handle.  */
 597   init_crit ();
 598
 599   /* Remember original console settings.  */
 600   keyboard_handle = GetStdHandle (STD_INPUT_HANDLE);
 601   GetConsoleMode (keyboard_handle, &prev_console_mode);
 602
 603   prev_screen = GetStdHandle (STD_OUTPUT_HANDLE);
 604
 605 #ifdef USE_SEPARATE_SCREEN
 606   cur_screen = CreateConsoleScreenBuffer (GENERIC_READ | GENERIC_WRITE,
 607                                           0, NULL,
 608                                           CONSOLE_TEXTMODE_BUFFER,
 609                                           NULL);
 610
 611   if (cur_screen == INVALID_HANDLE_VALUE)
 612     {
 613       printf ("CreateConsoleScreenBuffer failed in ResetTerm\n");
 614       printf ("LastError = 0x%lx\n", GetLastError ());
 615       fflush (stdout);
 616       exit (0);
 617     }
 618 #else
 619   cur_screen = prev_screen;
 620   GetConsoleCursorInfo (prev_screen, &prev_console_cursor);
 621 #endif
 622
 623   /* Respect setting of LINES and COLUMNS environment variables.  */
 624   {
 625     char * lines = getenv("LINES");
 626     char * columns = getenv("COLUMNS");
 627
 628     if (lines != NULL && columns != NULL)
 629       {
 630         SMALL_RECT new_win_dims;
 631         COORD new_size;
 632
 633         new_size.X = atoi (columns);
 634         new_size.Y = atoi (lines);
 635
 636         GetConsoleScreenBufferInfo (cur_screen, &info);
 637
 638         /* Shrink the window first, so the buffer dimensions can be
 639            reduced if necessary.  */
 640         new_win_dims.Top = 0;
 641         new_win_dims.Left = 0;
 642         new_win_dims.Bottom = min (new_size.Y, info.dwSize.Y) - 1;
 643         new_win_dims.Right = min (new_size.X, info.dwSize.X) - 1;
 644         SetConsoleWindowInfo (cur_screen, TRUE, &new_win_dims);
 645
 646         SetConsoleScreenBufferSize (cur_screen, new_size);
 647
 648         /* Set the window size to match the buffer dimension.  */
 649         new_win_dims.Top = 0;
 650         new_win_dims.Left = 0;
 651         new_win_dims.Bottom = new_size.Y - 1;
 652         new_win_dims.Right = new_size.X - 1;
 653         SetConsoleWindowInfo (cur_screen, TRUE, &new_win_dims);
 654       }
 655   }
 656
 657   GetConsoleScreenBufferInfo (cur_screen, &info);
 658
 659   meta_key = 1;
 660   char_attr_normal = info.wAttributes;
 661
 662   if (w32_use_full_screen_buffer)
 663     {
 664       FRAME_LINES (SELECTED_FRAME ()) = info.dwSize.Y;  /* lines per page */
 665       SET_FRAME_COLS (SELECTED_FRAME (), info.dwSize.X);  /* characters per line */
 666     }
 667   else
 668     {
 669       /* Lines per page.  Use buffer coords instead of buffer size.  */
 670       FRAME_LINES (SELECTED_FRAME ()) = 1 + info.srWindow.Bottom -
 671         info.srWindow.Top;
 672       /* Characters per line.  Use buffer coords instead of buffer size.  */
 673       SET_FRAME_COLS (SELECTED_FRAME (), 1 + info.srWindow.Right -
 674                        info.srWindow.Left);
 675     }
 676
 677   /* Setup w32_display_info structure for this frame. */
 678
 679   w32_initialize_display_info (build_string ("Console"));
 680
 681 }
 682
 683 DEFUN ("set-screen-color", Fset_screen_color, Sset_screen_color, 2, 2, 0,
 684        doc: /* Set screen colors.  */)
 685     (foreground, background)
 686     Lisp_Object foreground;
 687     Lisp_Object background;
 688 {
 689   char_attr_normal = XFASTINT (foreground) + (XFASTINT (background) << 4);
 690
 691   Frecenter (Qnil);
 692   return Qt;
 693 }
 694
 695 DEFUN ("set-cursor-size", Fset_cursor_size, Sset_cursor_size, 1, 1, 0,
 696        doc: /* Set cursor size.  */)
 697     (size)
 698     Lisp_Object size;
 699 {
 700   CONSOLE_CURSOR_INFO cci;
 701   cci.dwSize = XFASTINT (size);
 702   cci.bVisible = TRUE;
 703   (void) SetConsoleCursorInfo (cur_screen, &cci);
 704
 705   return Qt;
 706 }
 707
 708 void
 709 syms_of_ntterm ()
 710 {
 711   DEFVAR_BOOL ("w32-use-full-screen-buffer",
 712                &w32_use_full_screen_buffer,
 713                doc: /* Non-nil means make terminal frames use the full screen buffer dimensions.
 714 This is desirable when running Emacs over telnet, and is the default.
 715 A value of nil means use the current console window dimensions; this
 716 may be preferrable when working directly at the console with a large
 717 scroll-back buffer.  */);
 718   w32_use_full_screen_buffer = 1;
 719
 720   defsubr (&Sset_screen_color);
 721   defsubr (&Sset_cursor_size);
 722   defsubr (&Sset_message_beep);
 723 }
 724
 725 /* arch-tag: a390a07f-f661-42bc-aeb4-e6d8bf860337
 726    (do not change this comment) */