frame.c 61.7 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Generic frame functions.
2
   Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation.
Jim Blandy's avatar
Jim Blandy committed
3 4 5 6 7

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
Jim Blandy's avatar
Jim Blandy committed
8
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
9 10 11 12 13 14 15 16 17
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
18 19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Jim Blandy's avatar
Jim Blandy committed
20

21
#include <config.h>
22 23

#include <stdio.h>
24
#include "lisp.h"
Karl Heuer's avatar
Karl Heuer committed
25 26 27 28
#include "charset.h"
#ifdef HAVE_WINDOW_SYSTEM
#include "fontset.h"
#endif
29
#include "frame.h"
30
#include "termhooks.h"
31
#include "window.h"
Morten Welinder's avatar
Morten Welinder committed
32 33 34
#ifdef MSDOS
#include "msdos.h"
#endif
Jim Blandy's avatar
Jim Blandy committed
35

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
/* Evaluate this expression to rebuild the section of syms_of_frame
   that initializes and staticpros the symbols declared below.  Note
   that Emacs 18 has a bug that keeps C-x C-e from being able to
   evaluate this expression.

(progn
  ;; Accumulate a list of the symbols we want to initialize from the
  ;; declarations at the top of the file.
  (goto-char (point-min))
  (search-forward "/\*&&& symbols declared here &&&*\/\n")
  (let (symbol-list)
    (while (looking-at "Lisp_Object \\(Q[a-z_]+\\)")
      (setq symbol-list
	    (cons (buffer-substring (match-beginning 1) (match-end 1))
		  symbol-list))
      (forward-line 1))
    (setq symbol-list (nreverse symbol-list))
    ;; Delete the section of syms_of_... where we initialize the symbols.
    (search-forward "\n  /\*&&& init symbols here &&&*\/\n")
    (let ((start (point)))
      (while (looking-at "^  Q")
	(forward-line 2))
      (kill-region start (point)))
    ;; Write a new symbol initialization section.
    (while symbol-list
      (insert (format "  %s = intern (\"" (car symbol-list)))
      (let ((start (point)))
	(insert (substring (car symbol-list) 1))
	(subst-char-in-region start (point) ?_ ?-))
      (insert (format "\");\n  staticpro (&%s);\n" (car symbol-list)))
      (setq symbol-list (cdr symbol-list)))))
  */        

/*&&& symbols declared here &&&*/
Lisp_Object Qframep;
Jim Blandy's avatar
Jim Blandy committed
71
Lisp_Object Qframe_live_p;
72 73
Lisp_Object Qheight;
Lisp_Object Qicon;
Jim Blandy's avatar
Jim Blandy committed
74
Lisp_Object Qminibuffer;
75 76 77 78
Lisp_Object Qmodeline;
Lisp_Object Qname;
Lisp_Object Qonly;
Lisp_Object Qunsplittable;
79
Lisp_Object Qmenu_bar_lines;
80 81
Lisp_Object Qwidth;
Lisp_Object Qx;
82
Lisp_Object Qw32;
83
Lisp_Object Qpc;
84
Lisp_Object Qvisible;
85
Lisp_Object Qbuffer_predicate;
86
Lisp_Object Qbuffer_list;
87
Lisp_Object Qtitle;
Jim Blandy's avatar
Jim Blandy committed
88

89
Lisp_Object Vterminal_frame;
90
Lisp_Object Vdefault_frame_alist;
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119

static void
syms_of_frame_1 ()
{
  /*&&& init symbols here &&&*/
  Qframep = intern ("framep");
  staticpro (&Qframep);
  Qframe_live_p = intern ("frame-live-p");
  staticpro (&Qframe_live_p);
  Qheight = intern ("height");
  staticpro (&Qheight);
  Qicon = intern ("icon");
  staticpro (&Qicon);
  Qminibuffer = intern ("minibuffer");
  staticpro (&Qminibuffer);
  Qmodeline = intern ("modeline");
  staticpro (&Qmodeline);
  Qname = intern ("name");
  staticpro (&Qname);
  Qonly = intern ("only");
  staticpro (&Qonly);
  Qunsplittable = intern ("unsplittable");
  staticpro (&Qunsplittable);
  Qmenu_bar_lines = intern ("menu-bar-lines");
  staticpro (&Qmenu_bar_lines);
  Qwidth = intern ("width");
  staticpro (&Qwidth);
  Qx = intern ("x");
  staticpro (&Qx);
120 121
  Qw32 = intern ("w32");
  staticpro (&Qw32);
122 123
  Qpc = intern ("pc");
  staticpro (&Qpc);
124 125 126 127
  Qvisible = intern ("visible");
  staticpro (&Qvisible);
  Qbuffer_predicate = intern ("buffer-predicate");
  staticpro (&Qbuffer_predicate);
128 129
  Qbuffer_list = intern ("buffer-list");
  staticpro (&Qbuffer_list);
130 131
  Qtitle = intern ("title");
  staticpro (&Qtitle);
132

133 134 135 136 137 138 139 140 141 142 143 144
  DEFVAR_LISP ("default-frame-alist", &Vdefault_frame_alist,
    "Alist of default values for frame creation.\n\
These may be set in your init file, like this:\n\
  (setq default-frame-alist '((width . 80) (height . 55) (menu-bar-lines . 1))\n\
These override values given in window system configuration data,\n\
 including X Windows' defaults database.\n\
For values specific to the first Emacs frame, see `initial-frame-alist'.\n\
For values specific to the separate minibuffer frame, see\n\
 `minibuffer-frame-alist'.\n\
The `menu-bar-lines' element of the list controls whether new frames\n\
 have menu bars; `menu-bar-mode' works by altering this element.");
  Vdefault_frame_alist = Qnil;
145 146 147 148 149 150 151 152 153
}

static void
set_menu_bar_lines_1 (window, n)
  Lisp_Object window;
  int n;
{
  struct window *w = XWINDOW (window);

154
  XSETFASTINT (w->last_modified, 0);
155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
  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))
    set_menu_bar_lines_1 (w->vchild, n);

  /* Adjust all children in a horizontal split.  */
  for (window = w->hchild; !NILP (window); window = w->next)
    {
      w = XWINDOW (window);
      set_menu_bar_lines_1 (window, n);
    }
}

static void
set_menu_bar_lines (f, value, oldval)
     struct frame *f;
     Lisp_Object value, oldval;
{
  int nlines;
  int olines = FRAME_MENU_BAR_LINES (f);

  /* Right now, menu bars don't work properly in minibuf-only frames;
     most of the commands try to apply themselves to the minibuffer
Karl Heuer's avatar
Karl Heuer committed
180
     frame itself, and get an error because you can't switch buffers
181 182 183 184 185 186 187 188 189
     in or split the minibuffer window.  */
  if (FRAME_MINIBUF_ONLY_P (f))
    return;

  if (INTEGERP (value))
    nlines = XINT (value);
  else
    nlines = 0;

190 191 192 193 194 195 196
  if (nlines != olines)
    {
      windows_or_buffers_changed++;
      FRAME_WINDOW_SIZES_CHANGED (f) = 1;
      FRAME_MENU_BAR_LINES (f) = nlines;
      set_menu_bar_lines_1 (f->root_window, nlines - olines);
    }
197 198 199 200 201 202 203 204 205 206 207
}

#include "buffer.h"

/* These help us bind and responding to switch-frame events.  */
#include "commands.h"
#include "keyboard.h"

Lisp_Object Vemacs_iconified;
Lisp_Object Vframe_list;

Jim Blandy's avatar
Jim Blandy committed
208 209
extern Lisp_Object Vminibuffer_list;
extern Lisp_Object get_minibuffer ();
210 211
extern Lisp_Object Fhandle_switch_frame ();
extern Lisp_Object Fredirect_frame_focus ();
Karl Heuer's avatar
Karl Heuer committed
212
extern Lisp_Object x_get_focus_frame ();
Jim Blandy's avatar
Jim Blandy committed
213

Jim Blandy's avatar
Jim Blandy committed
214 215 216
DEFUN ("framep", Fframep, Sframep, 1, 1, 0,
  "Return non-nil if OBJECT is a frame.\n\
Value is t for a termcap frame (a character-only terminal),\n\
Morten Welinder's avatar
Morten Welinder committed
217 218
`x' for an Emacs frame that is really an X window,\n\
`pc' for a direct-write MS-DOS frame.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
219
See also `frame-live-p'.")
Jim Blandy's avatar
Jim Blandy committed
220 221
  (object)
     Lisp_Object object;
Jim Blandy's avatar
Jim Blandy committed
222
{
223
  if (!FRAMEP (object))
Jim Blandy's avatar
Jim Blandy committed
224
    return Qnil;
Jim Blandy's avatar
Jim Blandy committed
225
  switch (XFRAME (object)->output_method)
Jim Blandy's avatar
Jim Blandy committed
226 227 228 229
    {
    case output_termcap:
      return Qt;
    case output_x_window:
230
      return Qx;
231 232
    case output_w32:
      return Qw32;
233 234
    case output_msdos_raw:
      return Qpc;
Jim Blandy's avatar
Jim Blandy committed
235 236 237 238 239
    default:
      abort ();
    }
}

Jim Blandy's avatar
Jim Blandy committed
240
DEFUN ("frame-live-p", Fframe_live_p, Sframe_live_p, 1, 1, 0,
Jim Blandy's avatar
Jim Blandy committed
241 242 243 244 245
  "Return non-nil if OBJECT is a frame which has not been deleted.\n\
Value is nil if OBJECT is not a live frame.  If object is a live\n\
frame, the return value indicates what sort of output device it is\n\
displayed on.  Value is t for a termcap frame (a character-only\n\
terminal), `x' for an Emacs frame being displayed in an X window.")
Jim Blandy's avatar
Jim Blandy committed
246 247 248
  (object)
     Lisp_Object object;
{
Jim Blandy's avatar
Jim Blandy committed
249 250 251
  return ((FRAMEP (object)
	   && FRAME_LIVE_P (XFRAME (object)))
	  ? Fframep (object)
Jim Blandy's avatar
Jim Blandy committed
252 253 254
	  : Qnil);
}

Jim Blandy's avatar
Jim Blandy committed
255 256
struct frame *
make_frame (mini_p)
Jim Blandy's avatar
Jim Blandy committed
257 258
     int mini_p;
{
Jim Blandy's avatar
Jim Blandy committed
259 260
  Lisp_Object frame;
  register struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
261 262
  register Lisp_Object root_window;
  register Lisp_Object mini_window;
263 264 265 266 267 268 269 270 271
  register struct Lisp_Vector *vec;
  int i;

  vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct frame));
  for (i = 0; i < VECSIZE (struct frame); i++)
    XSETFASTINT (vec->contents[i], 0);
  vec->size = VECSIZE (struct frame);
  f = (struct frame *)vec;
  XSETFRAME (frame, f);
Jim Blandy's avatar
Jim Blandy committed
272 273 274 275 276 277

  f->cursor_x = 0;
  f->cursor_y = 0;
  f->current_glyphs = 0;
  f->desired_glyphs = 0;
  f->visible = 0;
278
  f->async_visible = 0;
279
  f->output_data.nothing = 0;
Jim Blandy's avatar
Jim Blandy committed
280
  f->iconified = 0;
281
  f->async_iconified = 0;
Jim Blandy's avatar
Jim Blandy committed
282 283 284 285 286 287
  f->wants_modeline = 1;
  f->auto_raise = 0;
  f->auto_lower = 0;
  f->no_split = 0;
  f->garbaged = 0;
  f->has_minibuffer = mini_p;
288
  f->focus_frame = Qnil;
289
  f->explicit_name = 0;
290
  f->can_have_scroll_bars = 0;
291
  f->vertical_scroll_bar_type = vertical_scroll_bar_none;
Jim Blandy's avatar
Jim Blandy committed
292
  f->param_alist = Qnil;
293 294
  f->scroll_bars = Qnil;
  f->condemned_scroll_bars = Qnil;
295
  f->face_alist = Qnil;
296
  f->menu_bar_items = Qnil;
297 298
  f->menu_bar_vector = Qnil;
  f->menu_bar_items_used = 0;
299
  f->buffer_predicate = Qnil;
300
  f->buffer_list = Qnil;
301 302 303
#ifdef MULTI_KBOARD
  f->kboard = initial_kboard;
#endif
304
  f->namebuf = 0;
305
  f->title = Qnil;
Jim Blandy's avatar
Jim Blandy committed
306

307
  root_window = make_window ();
Jim Blandy's avatar
Jim Blandy committed
308 309
  if (mini_p)
    {
310
      mini_window = make_window ();
Jim Blandy's avatar
Jim Blandy committed
311 312 313
      XWINDOW (root_window)->next = mini_window;
      XWINDOW (mini_window)->prev = root_window;
      XWINDOW (mini_window)->mini_p = Qt;
Jim Blandy's avatar
Jim Blandy committed
314 315
      XWINDOW (mini_window)->frame = frame;
      f->minibuffer_window = mini_window;
Jim Blandy's avatar
Jim Blandy committed
316 317 318 319 320
    }
  else
    {
      mini_window = Qnil;
      XWINDOW (root_window)->next = Qnil;
Jim Blandy's avatar
Jim Blandy committed
321
      f->minibuffer_window = Qnil;
Jim Blandy's avatar
Jim Blandy committed
322 323
    }

Jim Blandy's avatar
Jim Blandy committed
324
  XWINDOW (root_window)->frame = frame;
Jim Blandy's avatar
Jim Blandy committed
325 326 327

  /* 10 is arbitrary,
     just so that there is "something there."
Jim Blandy's avatar
Jim Blandy committed
328
     Correct size will be set up later with change_frame_size.  */
Jim Blandy's avatar
Jim Blandy committed
329

330
  SET_FRAME_WIDTH (f, 10);
Jim Blandy's avatar
Jim Blandy committed
331
  f->height = 10;
Jim Blandy's avatar
Jim Blandy committed
332

333 334
  XSETFASTINT (XWINDOW (root_window)->width, 10);
  XSETFASTINT (XWINDOW (root_window)->height, (mini_p ? 9 : 10));
Jim Blandy's avatar
Jim Blandy committed
335 336 337

  if (mini_p)
    {
338 339 340
      XSETFASTINT (XWINDOW (mini_window)->width, 10);
      XSETFASTINT (XWINDOW (mini_window)->top, 9);
      XSETFASTINT (XWINDOW (mini_window)->height, 1);
Jim Blandy's avatar
Jim Blandy committed
341 342
    }

Jim Blandy's avatar
Jim Blandy committed
343
  /* Choose a buffer for the frame's root window.  */
Jim Blandy's avatar
Jim Blandy committed
344 345 346 347 348 349 350 351
  {
    Lisp_Object buf;

    XWINDOW (root_window)->buffer = Qt;
    buf = Fcurrent_buffer ();
    /* If buf is a 'hidden' buffer (i.e. one whose name starts with
       a space), try to find another one.  */
    if (XSTRING (Fbuffer_name (buf))->data[0] == ' ')
352
      buf = Fother_buffer (buf, Qnil);
Jim Blandy's avatar
Jim Blandy committed
353
    Fset_window_buffer (root_window, buf);
354 355

    f->buffer_list = Fcons (buf, Qnil);
Jim Blandy's avatar
Jim Blandy committed
356 357
  }

Jim Blandy's avatar
Jim Blandy committed
358 359 360 361
  if (mini_p)
    {
      XWINDOW (mini_window)->buffer = Qt;
      Fset_window_buffer (mini_window,
Jim Blandy's avatar
Jim Blandy committed
362
			  (NILP (Vminibuffer_list)
Jim Blandy's avatar
Jim Blandy committed
363 364 365 366
			   ? get_minibuffer (0)
			   : Fcar (Vminibuffer_list)));
    }

Jim Blandy's avatar
Jim Blandy committed
367 368
  f->root_window = root_window;
  f->selected_window = root_window;
Jim Blandy's avatar
Jim Blandy committed
369 370
  /* Make sure this window seems more recently used than
     a newly-created, never-selected window.  */
371
  XSETFASTINT (XWINDOW (f->selected_window)->use_time, ++window_select_count);
Jim Blandy's avatar
Jim Blandy committed
372

Karl Heuer's avatar
Karl Heuer committed
373 374 375 376
#ifdef HAVE_WINDOW_SYSTEM
  f->fontset_data = alloc_fontset_data ();
#endif

Jim Blandy's avatar
Jim Blandy committed
377
  return f;
Jim Blandy's avatar
Jim Blandy committed
378 379
}

Jim Blandy's avatar
Jim Blandy committed
380
/* Make a frame using a separate minibuffer window on another frame.
Jim Blandy's avatar
Jim Blandy committed
381 382 383
   MINI_WINDOW is the minibuffer window to use.  nil means use the
   default (the global minibuffer).  */

Jim Blandy's avatar
Jim Blandy committed
384
struct frame *
385
make_frame_without_minibuffer (mini_window, kb, display)
Jim Blandy's avatar
Jim Blandy committed
386
     register Lisp_Object mini_window;
387
     KBOARD *kb;
388
     Lisp_Object display;
Jim Blandy's avatar
Jim Blandy committed
389
{
Jim Blandy's avatar
Jim Blandy committed
390
  register struct frame *f;
391
  struct gcpro gcpro1;
Jim Blandy's avatar
Jim Blandy committed
392

393 394
  if (!NILP (mini_window))
    CHECK_LIVE_WINDOW (mini_window, 0);
Jim Blandy's avatar
Jim Blandy committed
395

396
#ifdef MULTI_KBOARD
397 398
  if (!NILP (mini_window)
      && XFRAME (XWINDOW (mini_window)->frame)->kboard != kb)
399 400 401
    error ("frame and minibuffer must be on the same display");
#endif

Jim Blandy's avatar
Jim Blandy committed
402 403
  /* Make a frame containing just a root window.  */
  f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
404

405 406 407 408 409 410
  if (NILP (mini_window))
    {
      /* Use default-minibuffer-frame if possible.  */
      if (!FRAMEP (kb->Vdefault_minibuffer_frame)
	  || ! FRAME_LIVE_P (XFRAME (kb->Vdefault_minibuffer_frame)))
	{
411 412 413 414
          Lisp_Object frame_dummy;

          XSETFRAME (frame_dummy, f);
          GCPRO1 (frame_dummy);
415
	  /* If there's no minibuffer frame to use, create one.  */
416 417 418
	  kb->Vdefault_minibuffer_frame =
	    call1 (intern ("make-initial-minibuffer-frame"), display);
          UNGCPRO;
419
	}
420
   
421 422
      mini_window = XFRAME (kb->Vdefault_minibuffer_frame)->minibuffer_window;
    }
423

Jim Blandy's avatar
Jim Blandy committed
424
  f->minibuffer_window = mini_window;
425 426 427 428 429 430 431 432

  /* Make the chosen minibuffer window display the proper minibuffer,
     unless it is already showing a minibuffer.  */
  if (NILP (Fmemq (XWINDOW (mini_window)->buffer, Vminibuffer_list)))
    Fset_window_buffer (mini_window,
			(NILP (Vminibuffer_list)
			 ? get_minibuffer (0)
			 : Fcar (Vminibuffer_list)));
Jim Blandy's avatar
Jim Blandy committed
433
  return f;
Jim Blandy's avatar
Jim Blandy committed
434 435
}

Jim Blandy's avatar
Jim Blandy committed
436
/* Make a frame containing only a minibuffer window.  */
Jim Blandy's avatar
Jim Blandy committed
437

Jim Blandy's avatar
Jim Blandy committed
438 439
struct frame *
make_minibuffer_frame ()
Jim Blandy's avatar
Jim Blandy committed
440
{
Jim Blandy's avatar
Jim Blandy committed
441
  /* First make a frame containing just a root window, no minibuffer.  */
Jim Blandy's avatar
Jim Blandy committed
442

Jim Blandy's avatar
Jim Blandy committed
443
  register struct frame *f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
444
  register Lisp_Object mini_window;
Jim Blandy's avatar
Jim Blandy committed
445
  register Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
446

447
  XSETFRAME (frame, f);
Jim Blandy's avatar
Jim Blandy committed
448

449
  f->auto_raise = 0;
Jim Blandy's avatar
Jim Blandy committed
450 451 452 453
  f->auto_lower = 0;
  f->no_split = 1;
  f->wants_modeline = 0;
  f->has_minibuffer = 1;
Jim Blandy's avatar
Jim Blandy committed
454 455 456 457 458

  /* Now label the root window as also being the minibuffer.
     Avoid infinite looping on the window chain by marking next pointer
     as nil. */

Jim Blandy's avatar
Jim Blandy committed
459
  mini_window = f->minibuffer_window = f->root_window;
Jim Blandy's avatar
Jim Blandy committed
460 461
  XWINDOW (mini_window)->mini_p = Qt;
  XWINDOW (mini_window)->next = Qnil;
462
  XWINDOW (mini_window)->prev = Qnil;
Jim Blandy's avatar
Jim Blandy committed
463
  XWINDOW (mini_window)->frame = frame;
Jim Blandy's avatar
Jim Blandy committed
464 465 466 467

  /* Put the proper buffer in that window.  */

  Fset_window_buffer (mini_window,
Jim Blandy's avatar
Jim Blandy committed
468
		      (NILP (Vminibuffer_list)
Jim Blandy's avatar
Jim Blandy committed
469 470
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)));
Jim Blandy's avatar
Jim Blandy committed
471
  return f;
Jim Blandy's avatar
Jim Blandy committed
472 473
}

Jim Blandy's avatar
Jim Blandy committed
474
/* Construct a frame that refers to the terminal (stdin and stdout).  */
Jim Blandy's avatar
Jim Blandy committed
475

476 477
static int terminal_frame_count;

Jim Blandy's avatar
Jim Blandy committed
478 479
struct frame *
make_terminal_frame ()
Jim Blandy's avatar
Jim Blandy committed
480
{
Jim Blandy's avatar
Jim Blandy committed
481
  register struct frame *f;
482
  Lisp_Object frame;
483 484
  char name[20];

485 486 487 488 489
#ifdef MULTI_KBOARD
  if (!initial_kboard)
    {
      initial_kboard = (KBOARD *) xmalloc (sizeof (KBOARD));
      init_kboard (initial_kboard);
490 491
      initial_kboard->next_kboard = all_kboards;
      all_kboards = initial_kboard;
492 493 494
    }
#endif

495 496 497
  /* The first call must initialize Vframe_list.  */
  if (! (NILP (Vframe_list) || CONSP (Vframe_list)))
    Vframe_list = Qnil;
Jim Blandy's avatar
Jim Blandy committed
498 499

  f = make_frame (1);
500

501
  XSETFRAME (frame, f);
502 503
  Vframe_list = Fcons (frame, Vframe_list);

504
  terminal_frame_count++;
505 506 507 508 509 510 511 512 513
  if (terminal_frame_count == 1)
    {
      f->name = build_string ("Emacs");
    }
  else
    {
      sprintf (name, "Emacs-%d", terminal_frame_count);
      f->name = build_string (name);
    }
514 515 516

  f->visible = 1;		/* FRAME_SET_VISIBLE wd set frame_garbaged. */
  f->async_visible = 1;		/* Don't let visible be cleared later. */
517 518 519 520 521
#ifdef MSDOS
  f->output_data.x = &the_only_x_display;
  f->output_method = output_msdos_raw;
  init_frame_faces (f);
#else /* not MSDOS */
522
  f->output_data.nothing = 1;	/* Nonzero means frame isn't deleted.  */
523
#endif
Jim Blandy's avatar
Jim Blandy committed
524
  return f;
Jim Blandy's avatar
Jim Blandy committed
525
}
526 527

DEFUN ("make-terminal-frame", Fmake_terminal_frame, Smake_terminal_frame,
528 529 530 531 532 533
       1, 1, 0, "Create an additional terminal frame.\n\
You can create multiple frames on a text-only terminal in this way.\n\
Only the selected terminal frame is actually displayed.\n\
This function takes one argument, an alist specifying frame parameters.\n\
In practice, generally you don't need to specify any parameters.\n\
Note that changing the size of one terminal frame automatically affects all.")
534 535 536 537 538 539
  (parms)
     Lisp_Object parms;
{
  struct frame *f;
  Lisp_Object frame;

540
#ifdef MSDOS
541 542 543
  if (selected_frame->output_method != output_msdos_raw)
    abort ();
#else
544 545
  if (selected_frame->output_method != output_termcap)
    error ("Not using an ASCII terminal now; cannot make a new ASCII frame");
546
#endif
547 548 549 550 551 552 553

  f = make_terminal_frame ();
  change_frame_size (f, FRAME_HEIGHT (selected_frame),
		     FRAME_WIDTH (selected_frame), 0, 0);
  remake_frame_glyphs (f);
  calculate_costs (f);
  XSETFRAME (frame, f);
554
  Fmodify_frame_parameters (frame, Vdefault_frame_alist);
555
  Fmodify_frame_parameters (frame, parms);
556
  f->face_alist = selected_frame->face_alist;
557 558
  return frame;
}
Jim Blandy's avatar
Jim Blandy committed
559

560
Lisp_Object
561
do_switch_frame (frame, no_enter, track)
Jim Blandy's avatar
Jim Blandy committed
562
     Lisp_Object frame, no_enter;
563
     int track;
Jim Blandy's avatar
Jim Blandy committed
564
{
565 566 567 568 569 570 571
  /* If FRAME is a switch-frame event, extract the frame we should
     switch to.  */
  if (CONSP (frame)
      && EQ (XCONS (frame)->car, Qswitch_frame)
      && CONSP (XCONS (frame)->cdr))
    frame = XCONS (XCONS (frame)->cdr)->car;

572 573 574 575 576 577
  /* This used to say CHECK_LIVE_FRAME, but apparently it's possible for
     a switch-frame event to arrive after a frame is no longer live,
     especially when deleting the initial frame during startup.  */
  CHECK_FRAME (frame, 0);
  if (! FRAME_LIVE_P (XFRAME (frame)))
    return Qnil;
Jim Blandy's avatar
Jim Blandy committed
578

Jim Blandy's avatar
Jim Blandy committed
579 580
  if (selected_frame == XFRAME (frame))
    return frame;
Jim Blandy's avatar
Jim Blandy committed
581

582 583 584
  /* This is too greedy; it causes inappropriate focus redirection
     that's hard to get rid of.  */
#if 0
585 586 587 588 589 590 591
  /* If a frame's focus has been redirected toward the currently
     selected frame, we should change the redirection to point to the
     newly selected frame.  This means that if the focus is redirected
     from a minibufferless frame to a surrogate minibuffer frame, we
     can use `other-window' to switch between all the frames using
     that minibuffer frame, and the focus redirection will follow us
     around.  */
592 593 594
  if (track)
    {
      Lisp_Object tail;
595

596 597 598
      for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
	{
	  Lisp_Object focus;
599

600
	  if (!FRAMEP (XCONS (tail)->car))
601
	    abort ();
602

603
	  focus = FRAME_FOCUS_FRAME (XFRAME (XCONS (tail)->car));
604

605
	  if (FRAMEP (focus) && XFRAME (focus) == selected_frame)
606 607 608 609 610
	    Fredirect_frame_focus (XCONS (tail)->car, frame);
	}
    }
#else /* ! 0 */
  /* Instead, apply it only to the frame we're pointing to.  */
611 612
#ifdef HAVE_WINDOW_SYSTEM
  if (track && (FRAME_WINDOW_P (XFRAME (frame))))
613 614 615
    {
      Lisp_Object focus, xfocus;

616
      xfocus = x_get_focus_frame (XFRAME (frame));
617 618 619 620 621 622 623 624 625
      if (FRAMEP (xfocus))
	{
	  focus = FRAME_FOCUS_FRAME (XFRAME (xfocus));
	  if (FRAMEP (focus) && XFRAME (focus) == selected_frame)
	    Fredirect_frame_focus (xfocus, frame);
	}
    }
#endif /* HAVE_X_WINDOWS */
#endif /* ! 0 */
626

Jim Blandy's avatar
Jim Blandy committed
627 628 629
  selected_frame = XFRAME (frame);
  if (! FRAME_MINIBUF_ONLY_P (selected_frame))
    last_nonminibuf_frame = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
630

Jim Blandy's avatar
Jim Blandy committed
631
  Fselect_window (XFRAME (frame)->selected_window);
Jim Blandy's avatar
Jim Blandy committed
632

633
  /* We want to make sure that the next event generates a frame-switch
634
     event to the appropriate frame.  This seems kludgy to me, but
635 636 637 638
     before you take it out, make sure that evaluating something like
     (select-window (frame-root-window (new-frame))) doesn't end up
     with your typing being interpreted in the new frame instead of
     the one you're actually typing in.  */
639
  internal_last_event_frame = Qnil;
640

Jim Blandy's avatar
Jim Blandy committed
641
  return frame;
Jim Blandy's avatar
Jim Blandy committed
642 643
}

644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665
DEFUN ("select-frame", Fselect_frame, Sselect_frame, 1, 2, "e",
  "Select the frame FRAME.\n\
Subsequent editing commands apply to its selected window.\n\
The selection of FRAME lasts until the next time the user does\n\
something to select a different frame, or until the next time this\n\
function is called.")
  (frame, no_enter)
    Lisp_Object frame, no_enter;
{
  return do_switch_frame (frame, no_enter, 1);
}


DEFUN ("handle-switch-frame", Fhandle_switch_frame, Shandle_switch_frame, 1, 2, "e",
  "Handle a switch-frame event EVENT.\n\
Switch-frame events are usually bound to this function.\n\
A switch-frame event tells Emacs that the window manager has requested\n\
that the user's events be directed to the frame mentioned in the event.\n\
This function selects the selected window of the frame of EVENT.\n\
\n\
If EVENT is frame object, handle it as if it were a switch-frame event\n\
to that frame.")
666 667
  (event, no_enter)
     Lisp_Object event, no_enter;
668
{
669 670
  /* Preserve prefix arg that the command loop just cleared.  */
  current_kboard->Vprefix_arg = Vcurrent_prefix_arg;
671
  call1 (Vrun_hooks, Qmouse_leave_buffer_hook);
672
  return do_switch_frame (event, no_enter, 0);
673 674
}

675 676 677 678 679 680 681 682
DEFUN ("ignore-event", Fignore_event, Signore_event, 0, 0, "",
  "Do nothing, but preserve any prefix argument already specified.\n\
This is a suitable binding for iconify-frame and make-frame-visible.")
     ()
{
  current_kboard->Vprefix_arg = Vcurrent_prefix_arg;
  return Qnil;
}
683

Jim Blandy's avatar
Jim Blandy committed
684 685
DEFUN ("selected-frame", Fselected_frame, Sselected_frame, 0, 0, 0,
  "Return the frame that is now selected.")
Jim Blandy's avatar
Jim Blandy committed
686 687 688
  ()
{
  Lisp_Object tem;
689
  XSETFRAME (tem, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
690 691
  return tem;
}
692

Jim Blandy's avatar
Jim Blandy committed
693 694
DEFUN ("window-frame", Fwindow_frame, Swindow_frame, 1, 1, 0,
  "Return the frame object that window WINDOW is on.")
Jim Blandy's avatar
Jim Blandy committed
695 696 697
  (window)
     Lisp_Object window;
{
698
  CHECK_LIVE_WINDOW (window, 0);
Jim Blandy's avatar
Jim Blandy committed
699
  return XWINDOW (window)->frame;
Jim Blandy's avatar
Jim Blandy committed
700 701
}

702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728
DEFUN ("frame-first-window", Fframe_first_window, Sframe_first_window, 0, 1, 0,
  "Returns the topmost, leftmost window of FRAME.\n\
If omitted, FRAME defaults to the currently selected frame.")
  (frame)
     Lisp_Object frame;
{
  Lisp_Object w;

  if (NILP (frame))
    w = selected_frame->root_window;
  else
    {
      CHECK_LIVE_FRAME (frame, 0);
      w = XFRAME (frame)->root_window;
    }
  while (NILP (XWINDOW (w)->buffer))
    {
      if (! NILP (XWINDOW (w)->hchild))
	w = XWINDOW (w)->hchild;
      else if (! NILP (XWINDOW (w)->vchild))
	w = XWINDOW (w)->vchild;
      else
	abort ();
    }
  return w;
}

729 730 731 732 733 734 735 736
DEFUN ("active-minibuffer-window", Factive_minibuffer_window,
       Sactive_minibuffer_window, 0, 0, 0,
       "Return the currently active minibuffer window, or nil if none.")
  ()
{
  return minibuf_level ? minibuf_window : Qnil;
}

Jim Blandy's avatar
Jim Blandy committed
737
DEFUN ("frame-root-window", Fframe_root_window, Sframe_root_window, 0, 1, 0,
738 739
       "Returns the root-window of FRAME.\n\
If omitted, FRAME defaults to the currently selected frame.")
Jim Blandy's avatar
Jim Blandy committed
740 741
  (frame)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
742
{
Jim Blandy's avatar
Jim Blandy committed
743
  if (NILP (frame))
744
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
745
  else
Jim Blandy's avatar
Jim Blandy committed
746
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
747

Jim Blandy's avatar
Jim Blandy committed
748
  return XFRAME (frame)->root_window;
Jim Blandy's avatar
Jim Blandy committed
749 750
}

Jim Blandy's avatar
Jim Blandy committed
751 752
DEFUN ("frame-selected-window", Fframe_selected_window,
       Sframe_selected_window, 0, 1, 0,
753 754
  "Return the selected window of frame object FRAME.\n\
If omitted, FRAME defaults to the currently selected frame.")
Jim Blandy's avatar
Jim Blandy committed
755 756
  (frame)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
757
{
Jim Blandy's avatar
Jim Blandy committed
758
  if (NILP (frame))
759
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
760
  else
Jim Blandy's avatar
Jim Blandy committed
761
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
762

Jim Blandy's avatar
Jim Blandy committed
763
  return XFRAME (frame)->selected_window;
Jim Blandy's avatar
Jim Blandy committed
764 765
}

766 767 768 769 770 771 772 773 774
DEFUN ("set-frame-selected-window", Fset_frame_selected_window,
       Sset_frame_selected_window, 2, 2, 0,
  "Set the selected window of frame object FRAME to WINDOW.\n\
If FRAME is nil, the selected frame is used.\n\
If FRAME is the selected frame, this makes WINDOW the selected window.")
  (frame, window)
     Lisp_Object frame, window;
{
  if (NILP (frame))
775
    XSETFRAME (frame, selected_frame);
776 777 778 779 780 781 782 783 784 785 786 787 788 789
  else
    CHECK_LIVE_FRAME (frame, 0);

  CHECK_LIVE_WINDOW (window, 1);

  if (! EQ (frame, WINDOW_FRAME (XWINDOW (window))))
    error ("In `set-frame-selected-window', WINDOW is not on FRAME");

  if (XFRAME (frame) == selected_frame)
    return Fselect_window (window);

  return XFRAME (frame)->selected_window = window;
}

Jim Blandy's avatar
Jim Blandy committed
790
DEFUN ("frame-list", Fframe_list, Sframe_list,
Jim Blandy's avatar
Jim Blandy committed
791
       0, 0, 0,
Jim Blandy's avatar
Jim Blandy committed
792
       "Return a list of all frames.")
Jim Blandy's avatar
Jim Blandy committed
793 794
  ()
{
Jim Blandy's avatar
Jim Blandy committed
795
  return Fcopy_sequence (Vframe_list);
Jim Blandy's avatar
Jim Blandy committed
796 797
}

Jim Blandy's avatar
Jim Blandy committed
798 799
/* Return the next frame in the frame list after FRAME.
   If MINIBUF is nil, exclude minibuffer-only frames.
800 801
   If MINIBUF is a window, include only its own frame
   and any frame now using that window as the minibuffer.
802
   If MINIBUF is `visible', include all visible frames.
803
   If MINIBUF is 0, include all visible and iconified frames.
804 805
   Otherwise, include all frames.  */

Jim Blandy's avatar
Jim Blandy committed
806
Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
807 808
next_frame (frame, minibuf)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
809
     Lisp_Object minibuf;
Jim Blandy's avatar
Jim Blandy committed
810 811 812 813
{
  Lisp_Object tail;
  int passed = 0;

Jim Blandy's avatar
Jim Blandy committed
814 815
  /* There must always be at least one frame in Vframe_list.  */
  if (! CONSP (Vframe_list))
Jim Blandy's avatar
Jim Blandy committed
816 817
    abort ();

Jim Blandy's avatar
Jim Blandy committed
818 819 820 821
  /* If this frame is dead, it won't be in Vframe_list, and we'll loop
     forever.  Forestall that.  */
  CHECK_LIVE_FRAME (frame, 0);

Jim Blandy's avatar
Jim Blandy committed
822
  while (1)
Jim Blandy's avatar
Jim Blandy committed
823
    for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
Jim Blandy's avatar
Jim Blandy committed
824
      {
825
	Lisp_Object f;
826

827
	f = XCONS (tail)->car;
828 829 830

	if (passed
	    && FRAME_KBOARD (XFRAME (f)) == FRAME_KBOARD (XFRAME (frame)))
Jim Blandy's avatar
Jim Blandy committed
831
	  {
832 833 834 835 836 837 838 839 840 841 842 843 844
	    /* Decide whether this frame is eligible to be returned.  */

	    /* If we've looped all the way around without finding any
	       eligible frames, return the original frame.  */
	    if (EQ (f, frame))
	      return f;

	    /* Let minibuf decide if this frame is acceptable.  */
	    if (NILP (minibuf))
	      {
		if (! FRAME_MINIBUF_ONLY_P (XFRAME (f)))
		  return f;
	      }
845 846 847 848 849 850
	    else if (EQ (minibuf, Qvisible))
	      {
		FRAME_SAMPLE_VISIBILITY (XFRAME (f));
		if (FRAME_VISIBLE_P (XFRAME (f)))
		  return f;
	      }
851 852 853 854 855 856 857
	    else if (XFASTINT (minibuf) == 0)
	      {
		FRAME_SAMPLE_VISIBILITY (XFRAME (f));
		if (FRAME_VISIBLE_P (XFRAME (f))
		    || FRAME_ICONIFIED_P (XFRAME (f)))
		  return f;
	      }
858
	    else if (WINDOWP (minibuf))
859
	      {
860 861 862 863 864 865
		if (EQ (FRAME_MINIBUF_WINDOW (XFRAME (f)), minibuf)
		    /* Check that F either is, or has forwarded its focus to,
		       MINIBUF's frame.  */
		    && (EQ (WINDOW_FRAME (XWINDOW (minibuf)), f)
			|| EQ (WINDOW_FRAME (XWINDOW (minibuf)),
			       FRAME_FOCUS_FRAME (XFRAME (f)))))
866 867 868
		  return f;
	      }
	    else
Jim Blandy's avatar
Jim Blandy committed
869
	      return f;
Jim Blandy's avatar
Jim Blandy committed
870
	  }
Jim Blandy's avatar
Jim Blandy committed
871

872
	if (EQ (frame, f))
Jim Blandy's avatar
Jim Blandy committed
873 874 875 876
	  passed++;
      }
}

Jim Blandy's avatar
Jim Blandy committed
877 878
/* Return the previous frame in the frame list before FRAME.
   If MINIBUF is nil, exclude minibuffer-only frames.
879 880
   If MINIBUF is a window, include only its own frame
   and any frame now using that window as the minibuffer.
881
   If MINIBUF is `visible', include all visible frames.
882
   If MINIBUF is 0, include all visible and iconified frames.
883 884
   Otherwise, include all frames.  */

Jim Blandy's avatar
Jim Blandy committed
885
Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
886 887
prev_frame (frame, minibuf)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
888
     Lisp_Object minibuf;
Jim Blandy's avatar
Jim Blandy committed
889 890 891 892
{
  Lisp_Object tail;
  Lisp_Object prev;

Jim Blandy's avatar
Jim Blandy committed
893 894
  /* There must always be at least one frame in Vframe_list.  */
  if (! CONSP (Vframe_list))
Jim Blandy's avatar
Jim Blandy committed
895 896
    abort ();

Jim Blandy's avatar
Jim Blandy committed
897
  prev = Qnil;
898
  for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
Jim Blandy's avatar
Jim Blandy committed
899
    {
900
      Lisp_Object f;
Jim Blandy's avatar
Jim Blandy committed
901

902
      f = XCONS (tail)->car;
903
      if (!FRAMEP (f))
904
	abort ();
Jim Blandy's avatar
Jim Blandy committed
905

906 907
      if (EQ (frame, f) && !NILP (prev))
	return prev;
Jim Blandy's avatar
Jim Blandy committed
908

909
      if (FRAME_KBOARD (XFRAME (f)) == FRAME_KBOARD (XFRAME (frame)))
910
	{
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941
	  /* Decide whether this frame is eligible to be returned,
	     according to minibuf.  */
	  if (NILP (minibuf))
	    {
	      if (! FRAME_MINIBUF_ONLY_P (XFRAME (f)))
		prev = f;
	    }
	  else if (WINDOWP (minibuf))
	    {
	      if (EQ (FRAME_MINIBUF_WINDOW (XFRAME (f)), minibuf)
		  /* Check that F either is, or has forwarded its focus to,
		     MINIBUF's frame.  */
		  && (EQ (WINDOW_FRAME (XWINDOW (minibuf)), f)
		      || EQ (WINDOW_FRAME (XWINDOW (minibuf)),
			     FRAME_FOCUS_FRAME (XFRAME (f)))))
		prev = f;
	    }
	  else if (EQ (minibuf, Qvisible))
	    {
	      FRAME_SAMPLE_VISIBILITY (XFRAME (f));
	      if (FRAME_VISIBLE_P (XFRAME (f)))
		prev = f;
	    }
	  else if (XFASTINT (minibuf) == 0)
	    {
	      FRAME_SAMPLE_VISIBILITY (XFRAME (f));
	      if (FRAME_VISIBLE_P (XFRAME (f))
		  || FRAME_ICONIFIED_P (XFRAME (f)))
		prev = f;
	    }
	  else
942 943
	    prev = f;
	}
Jim Blandy's avatar
Jim Blandy committed
944
    }
945 946 947 948 949 950 951 952 953 954 955

  /* We've scanned the entire list.  */
  if (NILP (prev))
    /* We went through the whole frame list without finding a single
       acceptable frame.  Return the original frame.  */
    return frame;
  else
    /* There were no acceptable frames in the list before FRAME; otherwise,
       we would have returned directly from the loop.  Since PREV is the last
       acceptable frame in the list, return it.  */
    return prev;
Jim Blandy's avatar
Jim Blandy committed
956 957
}

958

Jim Blandy's avatar
Jim Blandy committed
959 960
DEFUN ("next-frame", Fnext_frame, Snext_frame, 0, 2, 0,
  "Return the next frame in the frame list after FRAME.\n\
961
It considers only frames on the same terminal as FRAME.\n\
962
By default, skip minibuffer-only frames.\n\
963
If omitted, FRAME defaults to the selected frame.\n\
964
If optional argument MINIFRAME is nil, exclude minibuffer-only frames.\n\
965
If MINIFRAME is a window, include only its own frame\n\
966
and any frame now using that window as the minibuffer.\n\
967
If MINIFRAME is `visible', include all visible frames.\n\
968
If MINIFRAME is 0, include all visible and iconified frames.\n\
969
Otherwise, include all frames.")
Jim Blandy's avatar
Jim Blandy committed
970
  (frame, miniframe)
971
     Lisp_Object frame, miniframe;
Jim Blandy's avatar
Jim Blandy committed
972 973 974
{
  Lisp_Object tail;

Jim Blandy's avatar
Jim Blandy committed
975
  if (NILP (frame))
976
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
977
  else
Jim Blandy's avatar
Jim Blandy committed
978
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
979

Jim Blandy's avatar
Jim Blandy committed
980
  return next_frame (frame, miniframe);
Jim Blandy's avatar
Jim Blandy committed
981
}
Jim Blandy's avatar
Jim Blandy committed
982

983 984
DEFUN ("previous-frame", Fprevious_frame, Sprevious_frame, 0, 2, 0,
  "Return the previous frame in the frame list before FRAME.\n\
985
It considers only frames on the same terminal as FRAME.\n\
986 987 988
By default, skip minibuffer-only frames.\n\
If omitted, FRAME defaults to the selected frame.\n\
If optional argument MINIFRAME is nil, exclude minibuffer-only frames.\n\
989
If MINIFRAME is a window, include only its own frame\n\
990
and any frame now using that window as the minibuffer.\n\
991
If MINIFRAME is `visible', include all visible frames.\n\
992
If MINIFRAME is 0, include all visible and iconified frames.\n\
993
Otherwise, include all frames.")
994 995 996 997 998 999
  (frame, miniframe)
     Lisp_Object frame, miniframe;
{
  Lisp_Object tail;

  if (NILP (frame))
1000
    XSETFRAME (frame, selected_frame);
1001 1002 1003 1004 1005
  else
    CHECK_LIVE_FRAME (frame, 0);

  return prev_frame (frame, miniframe);
}
Jim Blandy's avatar
Jim Blandy committed
1006

1007 1008 1009
/* Return 1 if it is ok to delete frame F;
   0 if all frames aside from F are invisible.
   (Exception: if F is the terminal frame, and we are using X, return 1.)  */
Jim Blandy's avatar
Jim Blandy committed
1010

1011
int
1012 1013 1014 1015 1016 1017
other_visible_frames (f)
     FRAME_PTR f;
{
  /* We know the selected frame is visible,
     so if F is some other frame, it can't be the sole visible one.  */
  if (f == selected_frame)
1018 1019 1020 1021 1022 1023 1024 1025
    {
      Lisp_Object frames;
      int count = 0;

      for (frames = Vframe_list;
	   CONSP (frames);
	   frames = XCONS (frames)->cdr)
	{
1026
	  Lisp_Object this;
1027

1028
	  this = XCONS (frames)->car;
1029 1030 1031
	  /* Verify that the frame's window still exists
	     and we can still talk to it.  And note any recent change
	     in visibility.  */