frame.c 66.1 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Generic frame functions.
2
   Copyright (C) 1993, 1994, 1995 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 18 19
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.  */

20
#include <config.h>
21 22

#include <stdio.h>
23 24
#include "lisp.h"
#include "frame.h"
25
#include "termhooks.h"
26
#include "window.h"
Morten Welinder's avatar
Morten Welinder committed
27 28 29
#ifdef MSDOS
#include "msdos.h"
#endif
Jim Blandy's avatar
Jim Blandy committed
30

Jim Blandy's avatar
Jim Blandy committed
31
#ifdef MULTI_FRAME
Jim Blandy's avatar
Jim Blandy committed
32

Jim Blandy's avatar
Jim Blandy committed
33
#include "buffer.h"
Jim Blandy's avatar
Jim Blandy committed
34

35 36 37 38
/* These help us bind and responding to switch-frame events.  */
#include "commands.h"
#include "keyboard.h"

Jim Blandy's avatar
Jim Blandy committed
39
Lisp_Object Vemacs_iconified;
Jim Blandy's avatar
Jim Blandy committed
40 41 42
Lisp_Object Vframe_list;
Lisp_Object Vterminal_frame;
Lisp_Object Vdefault_frame_alist;
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 71 72 73 74 75 76 77 78

/* 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
79
Lisp_Object Qframe_live_p;
80 81
Lisp_Object Qheight;
Lisp_Object Qicon;
Jim Blandy's avatar
Jim Blandy committed
82
Lisp_Object Qminibuffer;
83 84 85 86
Lisp_Object Qmodeline;
Lisp_Object Qname;
Lisp_Object Qonly;
Lisp_Object Qunsplittable;
87
Lisp_Object Qmenu_bar_lines;
88 89
Lisp_Object Qwidth;
Lisp_Object Qx;
90
Lisp_Object Qvisible;
91
Lisp_Object Qbuffer_predicate;
Jim Blandy's avatar
Jim Blandy committed
92 93 94

extern Lisp_Object Vminibuffer_list;
extern Lisp_Object get_minibuffer ();
95 96
extern Lisp_Object Fhandle_switch_frame ();
extern Lisp_Object Fredirect_frame_focus ();
Karl Heuer's avatar
Karl Heuer committed
97
extern Lisp_Object x_get_focus_frame ();
Jim Blandy's avatar
Jim Blandy committed
98

Jim Blandy's avatar
Jim Blandy committed
99 100 101
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
102 103
`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
104
See also `frame-live-p'.")
Jim Blandy's avatar
Jim Blandy committed
105 106
  (object)
     Lisp_Object object;
Jim Blandy's avatar
Jim Blandy committed
107
{
108
  if (!FRAMEP (object))
Jim Blandy's avatar
Jim Blandy committed
109
    return Qnil;
Jim Blandy's avatar
Jim Blandy committed
110
  switch (XFRAME (object)->output_method)
Jim Blandy's avatar
Jim Blandy committed
111 112 113 114
    {
    case output_termcap:
      return Qt;
    case output_x_window:
115
      return Qx;
Morten Welinder's avatar
Morten Welinder committed
116
      /* The `pc' case is in the Fframep below.  */
Jim Blandy's avatar
Jim Blandy committed
117 118 119 120 121
    default:
      abort ();
    }
}

Jim Blandy's avatar
Jim Blandy committed
122
DEFUN ("frame-live-p", Fframe_live_p, Sframe_live_p, 1, 1, 0,
Jim Blandy's avatar
Jim Blandy committed
123 124 125 126 127
  "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
128 129 130
  (object)
     Lisp_Object object;
{
Jim Blandy's avatar
Jim Blandy committed
131 132 133
  return ((FRAMEP (object)
	   && FRAME_LIVE_P (XFRAME (object)))
	  ? Fframep (object)
Jim Blandy's avatar
Jim Blandy committed
134 135 136
	  : Qnil);
}

Jim Blandy's avatar
Jim Blandy committed
137 138
struct frame *
make_frame (mini_p)
Jim Blandy's avatar
Jim Blandy committed
139 140
     int mini_p;
{
Jim Blandy's avatar
Jim Blandy committed
141 142
  Lisp_Object frame;
  register struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
143 144
  register Lisp_Object root_window;
  register Lisp_Object mini_window;
145 146 147 148 149 150 151 152 153
  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
154 155 156 157 158 159

  f->cursor_x = 0;
  f->cursor_y = 0;
  f->current_glyphs = 0;
  f->desired_glyphs = 0;
  f->visible = 0;
160
  f->async_visible = 0;
Jim Blandy's avatar
Jim Blandy committed
161 162
  f->display.nothing = 0;
  f->iconified = 0;
163
  f->async_iconified = 0;
Jim Blandy's avatar
Jim Blandy committed
164 165 166 167 168 169
  f->wants_modeline = 1;
  f->auto_raise = 0;
  f->auto_lower = 0;
  f->no_split = 0;
  f->garbaged = 0;
  f->has_minibuffer = mini_p;
170
  f->focus_frame = Qnil;
171
  f->explicit_name = 0;
172 173
  f->can_have_scroll_bars = 0;
  f->has_vertical_scroll_bars = 0;
Jim Blandy's avatar
Jim Blandy committed
174
  f->param_alist = Qnil;
175 176
  f->scroll_bars = Qnil;
  f->condemned_scroll_bars = Qnil;
177
  f->face_alist = Qnil;
178
  f->menu_bar_items = Qnil;
179 180
  f->menu_bar_vector = Qnil;
  f->menu_bar_items_used = 0;
181
  f->buffer_predicate = Qnil;
182 183 184
#ifdef MULTI_KBOARD
  f->kboard = initial_kboard;
#endif
185
  f->namebuf = 0;
Jim Blandy's avatar
Jim Blandy committed
186

187
  root_window = make_window ();
Jim Blandy's avatar
Jim Blandy committed
188 189
  if (mini_p)
    {
190
      mini_window = make_window ();
Jim Blandy's avatar
Jim Blandy committed
191 192 193
      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
194 195
      XWINDOW (mini_window)->frame = frame;
      f->minibuffer_window = mini_window;
Jim Blandy's avatar
Jim Blandy committed
196 197 198 199 200
    }
  else
    {
      mini_window = Qnil;
      XWINDOW (root_window)->next = Qnil;
Jim Blandy's avatar
Jim Blandy committed
201
      f->minibuffer_window = Qnil;
Jim Blandy's avatar
Jim Blandy committed
202 203
    }

Jim Blandy's avatar
Jim Blandy committed
204
  XWINDOW (root_window)->frame = frame;
Jim Blandy's avatar
Jim Blandy committed
205 206 207

  /* 10 is arbitrary,
     just so that there is "something there."
Jim Blandy's avatar
Jim Blandy committed
208
     Correct size will be set up later with change_frame_size.  */
Jim Blandy's avatar
Jim Blandy committed
209

Jim Blandy's avatar
Jim Blandy committed
210 211
  f->width = 10;
  f->height = 10;
Jim Blandy's avatar
Jim Blandy committed
212

213 214
  XSETFASTINT (XWINDOW (root_window)->width, 10);
  XSETFASTINT (XWINDOW (root_window)->height, (mini_p ? 9 : 10));
Jim Blandy's avatar
Jim Blandy committed
215 216 217

  if (mini_p)
    {
218 219 220
      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
221 222
    }

Jim Blandy's avatar
Jim Blandy committed
223
  /* Choose a buffer for the frame's root window.  */
Jim Blandy's avatar
Jim Blandy committed
224 225 226 227 228 229 230 231
  {
    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] == ' ')
232
      buf = Fother_buffer (buf, Qnil);
Jim Blandy's avatar
Jim Blandy committed
233 234 235
    Fset_window_buffer (root_window, buf);
  }

Jim Blandy's avatar
Jim Blandy committed
236 237 238 239
  if (mini_p)
    {
      XWINDOW (mini_window)->buffer = Qt;
      Fset_window_buffer (mini_window,
Jim Blandy's avatar
Jim Blandy committed
240
			  (NILP (Vminibuffer_list)
Jim Blandy's avatar
Jim Blandy committed
241 242 243 244
			   ? get_minibuffer (0)
			   : Fcar (Vminibuffer_list)));
    }

Jim Blandy's avatar
Jim Blandy committed
245 246
  f->root_window = root_window;
  f->selected_window = root_window;
Jim Blandy's avatar
Jim Blandy committed
247 248
  /* Make sure this window seems more recently used than
     a newly-created, never-selected window.  */
249
  XSETFASTINT (XWINDOW (f->selected_window)->use_time, ++window_select_count);
Jim Blandy's avatar
Jim Blandy committed
250

Jim Blandy's avatar
Jim Blandy committed
251
  return f;
Jim Blandy's avatar
Jim Blandy committed
252 253
}

Jim Blandy's avatar
Jim Blandy committed
254
/* Make a frame using a separate minibuffer window on another frame.
Jim Blandy's avatar
Jim Blandy committed
255 256 257
   MINI_WINDOW is the minibuffer window to use.  nil means use the
   default (the global minibuffer).  */

Jim Blandy's avatar
Jim Blandy committed
258
struct frame *
259
make_frame_without_minibuffer (mini_window, kb, display)
Jim Blandy's avatar
Jim Blandy committed
260
     register Lisp_Object mini_window;
261
     KBOARD *kb;
262
     Lisp_Object display;
Jim Blandy's avatar
Jim Blandy committed
263
{
Jim Blandy's avatar
Jim Blandy committed
264
  register struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
265

266 267
  if (!NILP (mini_window))
    CHECK_LIVE_WINDOW (mini_window, 0);
Jim Blandy's avatar
Jim Blandy committed
268

269
#ifdef MULTI_KBOARD
270 271
  if (!NILP (mini_window)
      && XFRAME (XWINDOW (mini_window)->frame)->kboard != kb)
272 273 274
    error ("frame and minibuffer must be on the same display");
#endif

Jim Blandy's avatar
Jim Blandy committed
275 276
  /* Make a frame containing just a root window.  */
  f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
277

278 279 280 281 282 283 284 285 286 287 288 289
  if (NILP (mini_window))
    {
      /* Use default-minibuffer-frame if possible.  */
      if (!FRAMEP (kb->Vdefault_minibuffer_frame)
	  || ! FRAME_LIVE_P (XFRAME (kb->Vdefault_minibuffer_frame)))
	{
	  /* If there's no minibuffer frame to use, create one.  */
	  kb->Vdefault_minibuffer_frame
	    = call1 (intern ("make-initial-minibuffer-frame"), display);
	}
      mini_window = XFRAME (kb->Vdefault_minibuffer_frame)->minibuffer_window;
    }
Jim Blandy's avatar
Jim Blandy committed
290
  /* Install the chosen minibuffer window, with proper buffer.  */
Jim Blandy's avatar
Jim Blandy committed
291
  f->minibuffer_window = mini_window;
Jim Blandy's avatar
Jim Blandy committed
292
  Fset_window_buffer (mini_window,
Jim Blandy's avatar
Jim Blandy committed
293
		      (NILP (Vminibuffer_list)
Jim Blandy's avatar
Jim Blandy committed
294 295
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)));
Jim Blandy's avatar
Jim Blandy committed
296
  return f;
Jim Blandy's avatar
Jim Blandy committed
297 298
}

Jim Blandy's avatar
Jim Blandy committed
299
/* Make a frame containing only a minibuffer window.  */
Jim Blandy's avatar
Jim Blandy committed
300

Jim Blandy's avatar
Jim Blandy committed
301 302
struct frame *
make_minibuffer_frame ()
Jim Blandy's avatar
Jim Blandy committed
303
{
Jim Blandy's avatar
Jim Blandy committed
304
  /* First make a frame containing just a root window, no minibuffer.  */
Jim Blandy's avatar
Jim Blandy committed
305

Jim Blandy's avatar
Jim Blandy committed
306
  register struct frame *f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
307
  register Lisp_Object mini_window;
Jim Blandy's avatar
Jim Blandy committed
308
  register Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
309

310
  XSETFRAME (frame, f);
Jim Blandy's avatar
Jim Blandy committed
311

312
  f->auto_raise = 0;
Jim Blandy's avatar
Jim Blandy committed
313 314 315 316
  f->auto_lower = 0;
  f->no_split = 1;
  f->wants_modeline = 0;
  f->has_minibuffer = 1;
Jim Blandy's avatar
Jim Blandy committed
317 318 319 320 321

  /* 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
322
  mini_window = f->minibuffer_window = f->root_window;
Jim Blandy's avatar
Jim Blandy committed
323 324
  XWINDOW (mini_window)->mini_p = Qt;
  XWINDOW (mini_window)->next = Qnil;
325
  XWINDOW (mini_window)->prev = Qnil;
Jim Blandy's avatar
Jim Blandy committed
326
  XWINDOW (mini_window)->frame = frame;
Jim Blandy's avatar
Jim Blandy committed
327 328 329 330

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

  Fset_window_buffer (mini_window,
Jim Blandy's avatar
Jim Blandy committed
331
		      (NILP (Vminibuffer_list)
Jim Blandy's avatar
Jim Blandy committed
332 333
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)));
Jim Blandy's avatar
Jim Blandy committed
334
  return f;
Jim Blandy's avatar
Jim Blandy committed
335 336
}

Jim Blandy's avatar
Jim Blandy committed
337
/* Construct a frame that refers to the terminal (stdin and stdout).  */
Jim Blandy's avatar
Jim Blandy committed
338

339 340
static int terminal_frame_count;

Jim Blandy's avatar
Jim Blandy committed
341 342
struct frame *
make_terminal_frame ()
Jim Blandy's avatar
Jim Blandy committed
343
{
Jim Blandy's avatar
Jim Blandy committed
344
  register struct frame *f;
345
  Lisp_Object frame;
346 347
  char name[20];

348 349 350 351 352
#ifdef MULTI_KBOARD
  if (!initial_kboard)
    {
      initial_kboard = (KBOARD *) xmalloc (sizeof (KBOARD));
      init_kboard (initial_kboard);
353 354
      initial_kboard->next_kboard = all_kboards;
      all_kboards = initial_kboard;
355 356 357
    }
#endif

358 359 360
  /* The first call must initialize Vframe_list.  */
  if (! (NILP (Vframe_list) || CONSP (Vframe_list)))
    Vframe_list = Qnil;
Jim Blandy's avatar
Jim Blandy committed
361 362

  f = make_frame (1);
363

364
  XSETFRAME (frame, f);
365 366
  Vframe_list = Fcons (frame, Vframe_list);

367
  terminal_frame_count++;
368 369 370 371 372 373 374 375 376
  if (terminal_frame_count == 1)
    {
      f->name = build_string ("Emacs");
    }
  else
    {
      sprintf (name, "Emacs-%d", terminal_frame_count);
      f->name = build_string (name);
    }
377 378 379 380

  f->visible = 1;		/* FRAME_SET_VISIBLE wd set frame_garbaged. */
  f->async_visible = 1;		/* Don't let visible be cleared later. */
  f->display.nothing = 1;	/* Nonzero means frame isn't deleted.  */
Jim Blandy's avatar
Jim Blandy committed
381
  return f;
Jim Blandy's avatar
Jim Blandy committed
382
}
383 384

DEFUN ("make-terminal-frame", Fmake_terminal_frame, Smake_terminal_frame,
385 386 387 388 389 390
       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.")
391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
  (parms)
     Lisp_Object parms;
{
  struct frame *f;
  Lisp_Object frame;

  if (selected_frame->output_method != output_termcap)
    error ("Not using an ASCII terminal now; cannot make a new ASCII frame");

  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);
  Fmodify_frame_parameters (frame, parms);
  return frame;
}
Jim Blandy's avatar
Jim Blandy committed
409

410 411
static Lisp_Object
do_switch_frame (frame, no_enter, track)
Jim Blandy's avatar
Jim Blandy committed
412
     Lisp_Object frame, no_enter;
413
     int track;
Jim Blandy's avatar
Jim Blandy committed
414
{
415 416 417 418 419 420 421
  /* 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;

422 423 424 425 426 427
  /* 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
428

Jim Blandy's avatar
Jim Blandy committed
429 430
  if (selected_frame == XFRAME (frame))
    return frame;
Jim Blandy's avatar
Jim Blandy committed
431

432 433 434
  /* This is too greedy; it causes inappropriate focus redirection
     that's hard to get rid of.  */
#if 0
435 436 437 438 439 440 441
  /* 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.  */
442 443 444
  if (track)
    {
      Lisp_Object tail;
445

446 447 448
      for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
	{
	  Lisp_Object focus;
449

450
	  if (!FRAMEP (XCONS (tail)->car))
451
	    abort ();
452

453
	  focus = FRAME_FOCUS_FRAME (XFRAME (XCONS (tail)->car));
454

455
	  if (FRAMEP (focus) && XFRAME (focus) == selected_frame)
456 457 458 459 460 461
	    Fredirect_frame_focus (XCONS (tail)->car, frame);
	}
    }
#else /* ! 0 */
  /* Instead, apply it only to the frame we're pointing to.  */
#ifdef HAVE_X_WINDOWS
462
  if (track && FRAME_X_P (XFRAME (frame)))
463 464 465
    {
      Lisp_Object focus, xfocus;

466
      xfocus = x_get_focus_frame (XFRAME (frame));
467 468 469 470 471 472 473 474 475
      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 */
476

477 478 479 480 481 482
  if (FRAME_TERMCAP_P (XFRAME (frame)))
    {
      /* Since frames on an ASCII terminal share the same display area,
	 switching means we must redisplay the whole thing.  */
      windows_or_buffers_changed++;
      SET_FRAME_GARBAGED (XFRAME (frame));
483
      XSETFRAME (Vterminal_frame, frame);
484 485
    }

Jim Blandy's avatar
Jim Blandy committed
486 487 488
  selected_frame = XFRAME (frame);
  if (! FRAME_MINIBUF_ONLY_P (selected_frame))
    last_nonminibuf_frame = selected_frame;
Jim Blandy's avatar
Jim Blandy committed
489

Jim Blandy's avatar
Jim Blandy committed
490 491
  Fselect_window (XFRAME (frame)->selected_window);
  choose_minibuf_frame ();
Jim Blandy's avatar
Jim Blandy committed
492

493
  /* We want to make sure that the next event generates a frame-switch
494
     event to the appropriate frame.  This seems kludgy to me, but
495 496 497 498
     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.  */
499
  internal_last_event_frame = Qnil;
500

Jim Blandy's avatar
Jim Blandy committed
501
  return frame;
Jim Blandy's avatar
Jim Blandy committed
502 503
}

504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
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.")
  (frame, no_enter)
     Lisp_Object frame, no_enter;
{
  return do_switch_frame (frame, no_enter, 0);
}


Jim Blandy's avatar
Jim Blandy committed
533 534
DEFUN ("selected-frame", Fselected_frame, Sselected_frame, 0, 0, 0,
  "Return the frame that is now selected.")
Jim Blandy's avatar
Jim Blandy committed
535 536 537
  ()
{
  Lisp_Object tem;
538
  XSETFRAME (tem, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
539 540
  return tem;
}
541

Jim Blandy's avatar
Jim Blandy committed
542 543
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
544 545 546
  (window)
     Lisp_Object window;
{
547
  CHECK_LIVE_WINDOW (window, 0);
Jim Blandy's avatar
Jim Blandy committed
548
  return XWINDOW (window)->frame;
Jim Blandy's avatar
Jim Blandy committed
549 550
}

551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
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;
}

578 579 580 581 582 583 584 585
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
586
DEFUN ("frame-root-window", Fframe_root_window, Sframe_root_window, 0, 1, 0,
587 588
       "Returns the root-window of FRAME.\n\
If omitted, FRAME defaults to the currently selected frame.")
Jim Blandy's avatar
Jim Blandy committed
589 590
  (frame)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
591
{
Jim Blandy's avatar
Jim Blandy committed
592
  if (NILP (frame))
593
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
594
  else
Jim Blandy's avatar
Jim Blandy committed
595
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
596

Jim Blandy's avatar
Jim Blandy committed
597
  return XFRAME (frame)->root_window;
Jim Blandy's avatar
Jim Blandy committed
598 599
}

Jim Blandy's avatar
Jim Blandy committed
600 601
DEFUN ("frame-selected-window", Fframe_selected_window,
       Sframe_selected_window, 0, 1, 0,
602 603
  "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
604 605
  (frame)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
606
{
Jim Blandy's avatar
Jim Blandy committed
607
  if (NILP (frame))
608
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
609
  else
Jim Blandy's avatar
Jim Blandy committed
610
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
611

Jim Blandy's avatar
Jim Blandy committed
612
  return XFRAME (frame)->selected_window;
Jim Blandy's avatar
Jim Blandy committed
613 614
}

615 616 617 618 619 620 621 622 623
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))
624
    XSETFRAME (frame, selected_frame);
625 626 627 628 629 630 631 632 633 634 635 636 637 638
  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
639
DEFUN ("frame-list", Fframe_list, Sframe_list,
Jim Blandy's avatar
Jim Blandy committed
640
       0, 0, 0,
Jim Blandy's avatar
Jim Blandy committed
641
       "Return a list of all frames.")
Jim Blandy's avatar
Jim Blandy committed
642 643
  ()
{
Jim Blandy's avatar
Jim Blandy committed
644
  return Fcopy_sequence (Vframe_list);
Jim Blandy's avatar
Jim Blandy committed
645 646
}

Jim Blandy's avatar
Jim Blandy committed
647 648
/* Return the next frame in the frame list after FRAME.
   If MINIBUF is nil, exclude minibuffer-only frames.
649 650
   If MINIBUF is a window, include only its own frame
   and any frame now using that window as the minibuffer.
651
   If MINIBUF is `visible', include all visible frames.
652
   If MINIBUF is 0, include all visible and iconified frames.
653 654
   Otherwise, include all frames.  */

Jim Blandy's avatar
Jim Blandy committed
655
Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
656 657
next_frame (frame, minibuf)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
658
     Lisp_Object minibuf;
Jim Blandy's avatar
Jim Blandy committed
659 660 661 662
{
  Lisp_Object tail;
  int passed = 0;

Jim Blandy's avatar
Jim Blandy committed
663 664
  /* There must always be at least one frame in Vframe_list.  */
  if (! CONSP (Vframe_list))
Jim Blandy's avatar
Jim Blandy committed
665 666
    abort ();

Jim Blandy's avatar
Jim Blandy committed
667 668 669 670
  /* 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
671
  while (1)
Jim Blandy's avatar
Jim Blandy committed
672
    for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
Jim Blandy's avatar
Jim Blandy committed
673
      {
674
	Lisp_Object f;
675

676
	f = XCONS (tail)->car;
Jim Blandy's avatar
Jim Blandy committed
677
	if (passed)
Jim Blandy's avatar
Jim Blandy committed
678
	  {
679 680 681 682 683 684 685 686 687 688 689 690 691
	    /* 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;
	      }
692 693 694 695 696 697
	    else if (EQ (minibuf, Qvisible))
	      {
		FRAME_SAMPLE_VISIBILITY (XFRAME (f));
		if (FRAME_VISIBLE_P (XFRAME (f)))
		  return f;
	      }
698 699 700 701 702 703 704
	    else if (XFASTINT (minibuf) == 0)
	      {
		FRAME_SAMPLE_VISIBILITY (XFRAME (f));
		if (FRAME_VISIBLE_P (XFRAME (f))
		    || FRAME_ICONIFIED_P (XFRAME (f)))
		  return f;
	      }
705
	    else if (WINDOWP (minibuf))
706
	      {
707 708 709 710 711 712
		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)))))
713 714 715
		  return f;
	      }
	    else
Jim Blandy's avatar
Jim Blandy committed
716
	      return f;
Jim Blandy's avatar
Jim Blandy committed
717
	  }
Jim Blandy's avatar
Jim Blandy committed
718

719
	if (EQ (frame, f))
Jim Blandy's avatar
Jim Blandy committed
720 721 722 723
	  passed++;
      }
}

Jim Blandy's avatar
Jim Blandy committed
724 725
/* Return the previous frame in the frame list before FRAME.
   If MINIBUF is nil, exclude minibuffer-only frames.
726 727
   If MINIBUF is a window, include only its own frame
   and any frame now using that window as the minibuffer.
728
   If MINIBUF is `visible', include all visible frames.
729
   If MINIBUF is 0, include all visible and iconified frames.
730 731
   Otherwise, include all frames.  */

Jim Blandy's avatar
Jim Blandy committed
732
Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
733 734
prev_frame (frame, minibuf)
     Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
735
     Lisp_Object minibuf;
Jim Blandy's avatar
Jim Blandy committed
736 737 738 739
{
  Lisp_Object tail;
  Lisp_Object prev;

Jim Blandy's avatar
Jim Blandy committed
740 741
  /* There must always be at least one frame in Vframe_list.  */
  if (! CONSP (Vframe_list))
Jim Blandy's avatar
Jim Blandy committed
742 743
    abort ();

Jim Blandy's avatar
Jim Blandy committed
744
  prev = Qnil;
745
  for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr)
Jim Blandy's avatar
Jim Blandy committed
746
    {
747
      Lisp_Object f;
Jim Blandy's avatar
Jim Blandy committed
748

749
      f = XCONS (tail)->car;
750
      if (!FRAMEP (f))
751
	abort ();
Jim Blandy's avatar
Jim Blandy committed
752

753 754
      if (EQ (frame, f) && !NILP (prev))
	return prev;
Jim Blandy's avatar
Jim Blandy committed
755

756 757 758 759 760 761
      /* Decide whether this frame is eligible to be returned,
	 according to minibuf.  */
      if (NILP (minibuf))
	{
	  if (! FRAME_MINIBUF_ONLY_P (XFRAME (f)))
	    prev = f;
Jim Blandy's avatar
Jim Blandy committed
762
	}
Richard M. Stallman's avatar
Richard M. Stallman committed
763
      else if (WINDOWP (minibuf))
764
	{
765 766 767 768 769 770
	  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)))))
771 772
	    prev = f;
	}
773 774 775 776 777 778
      else if (EQ (minibuf, Qvisible))
	{
	  FRAME_SAMPLE_VISIBILITY (XFRAME (f));
	  if (FRAME_VISIBLE_P (XFRAME (f)))
	    prev = f;
	}
Richard M. Stallman's avatar
Richard M. Stallman committed
779
      else if (XFASTINT (minibuf) == 0)
780 781 782 783 784 785
	{
	  FRAME_SAMPLE_VISIBILITY (XFRAME (f));
	  if (FRAME_VISIBLE_P (XFRAME (f))
	      || FRAME_ICONIFIED_P (XFRAME (f)))
	    prev = f;
	}
786 787
      else
	prev = f;
Jim Blandy's avatar
Jim Blandy committed
788
    }
789 790 791 792 793 794 795 796 797 798 799

  /* 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
800 801
}

802

Jim Blandy's avatar
Jim Blandy committed
803 804
DEFUN ("next-frame", Fnext_frame, Snext_frame, 0, 2, 0,
  "Return the next frame in the frame list after FRAME.\n\
805
By default, skip minibuffer-only frames.\n\
806
If omitted, FRAME defaults to the selected frame.\n\
807
If optional argument MINIFRAME is nil, exclude minibuffer-only frames.\n\
808 809
If MINIBUF is a window, include only its own frame\n\
and any frame now using that window as the minibuffer.\n\
810
If MINIFRAME is `visible', include all visible frames.\n\
811
If MINIBUF is 0, include all visible and iconified frames.\n\
812
Otherwise, include all frames.")
Jim Blandy's avatar
Jim Blandy committed
813
  (frame, miniframe)
814
     Lisp_Object frame, miniframe;
Jim Blandy's avatar
Jim Blandy committed
815 816 817
{
  Lisp_Object tail;

Jim Blandy's avatar
Jim Blandy committed
818
  if (NILP (frame))
819
    XSETFRAME (frame, selected_frame);
Jim Blandy's avatar
Jim Blandy committed
820
  else
Jim Blandy's avatar
Jim Blandy committed
821
    CHECK_LIVE_FRAME (frame, 0);
Jim Blandy's avatar
Jim Blandy committed
822

Jim Blandy's avatar
Jim Blandy committed
823
  return next_frame (frame, miniframe);
Jim Blandy's avatar
Jim Blandy committed
824
}
Jim Blandy's avatar
Jim Blandy committed
825

826 827 828 829 830
DEFUN ("previous-frame", Fprevious_frame, Sprevious_frame, 0, 2, 0,
  "Return the previous frame in the frame list before FRAME.\n\
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\
831 832
If MINIBUF is a window, include only its own frame\n\
and any frame now using that window as the minibuffer.\n\
833
If MINIFRAME is `visible', include all visible frames.\n\
834
If MINIBUF is 0, include all visible and iconified frames.\n\
835
Otherwise, include all frames.")
836 837 838 839 840 841
  (frame, miniframe)
     Lisp_Object frame, miniframe;
{
  Lisp_Object tail;

  if (NILP (frame))
842
    XSETFRAME (frame, selected_frame);
843 844 845 846 847
  else
    CHECK_LIVE_FRAME (frame, 0);

  return prev_frame (frame, miniframe);
}
Jim Blandy's avatar
Jim Blandy committed
848

849 850 851
/* 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
852

853
int
854 855 856 857 858 859
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)
860 861 862 863 864 865 866 867
    {
      Lisp_Object frames;
      int count = 0;

      for (frames = Vframe_list;
	   CONSP (frames);
	   frames = XCONS (frames)->cdr)
	{
868
	  Lisp_Object this;
869

870
	  this = XCONS (frames)->car;
871 872 873
	  /* Verify that the frame's window still exists
	     and we can still talk to it.  And note any recent change
	     in visibility.  */
874 875 876
#ifdef HAVE_X_WINDOWS
	  if (FRAME_X_P (XFRAME (this)))
	    {
877
	      x_sync (XFRAME (this));
878 879 880 881
	      FRAME_SAMPLE_VISIBILITY (XFRAME (this));
	    }
#endif

882 883 884 885
	  if (FRAME_VISIBLE_P (XFRAME (this))
	      || FRAME_ICONIFIED_P (XFRAME (this))
	      /* Allow deleting the terminal frame when at least
		 one X frame exists!  */
886
	      || (FRAME_X_P (XFRAME (this)) && !FRAME_X_P (f)))
887 888
	    count++;
	}
889
      return count > 1;
890
    }
891 892 893 894 895 896 897 898 899 900 901 902 903
  return 1;
}

DEFUN ("delete-frame", Fdelete_frame, Sdelete_frame, 0, 2, "",
  "Delete FRAME, permanently eliminating it from use.\n\
If omitted, FRAME defaults to the selected frame.\n\
A frame may not be deleted if its minibuffer is used by other frames.\n\
Normally, you may not delete a frame if all other frames are invisible,\n\
but if the second optional argument FORCE is non-nil, you may do so.")
  (frame, force)
     Lisp_Object frame, force;
{
  struct frame *f;
904
  int minibuffer_selected;
905 906 907 908

  if (EQ (frame, Qnil))
    {
      f = selected_frame;
909
      XSETFRAME (frame, f);
910 911 912 913 914 915 916 917 918 919 920 921
    }
  else
    {
      CHECK_FRAME (frame, 0);
      f = XFRAME (frame);
    }

  if (! FRAME_LIVE_P (f))
    return Qnil;

  if (NILP (force) && !other_visible_frames (f))
    error ("Attempt to delete the sole visible or iconified frame");
Jim Blandy's avatar
Jim Blandy committed
922

Jim Blandy's avatar
Jim Blandy committed
923 924
  /* Does this frame have a minibuffer, and is it the surrogate
     minibuffer for any other frame?  */
925
  if (FRAME_HAS_MINIBUF_P (XFRAME (frame)))
Jim Blandy's avatar
Jim Blandy committed
926
    {
Jim Blandy's avatar
Jim Blandy committed
927
      Lisp_Object frames;
Jim Blandy's avatar
Jim Blandy committed
928

Jim Blandy's avatar
Jim Blandy committed
929 930 931
      for (frames = Vframe_list;
	   CONSP (frames);
	   frames = XCONS (frames)->cdr)
Jim Blandy's avatar
Jim Blandy committed
932
	{
933 934
	  Lisp_Object this;
	  this = XCONS (frames)->car;
Jim Blandy's avatar
Jim Blandy committed
935

Jim Blandy's avatar
Jim Blandy committed
936 937
	  if (! EQ (this, frame)
	      && EQ (frame,
938 939
		     WINDOW_FRAME (XWINDOW
				   (FRAME_MINIBUF_WINDOW (XFRAME (this))))))
Jim Blandy's avatar
Jim Blandy committed
940
	    error ("Attempt to delete a surrogate minibuffer frame");
Jim Blandy's avatar
Jim Blandy committed
941
	}
Jim Blandy's avatar
Jim Blandy committed
942 943
    }

944 945
  minibuffer_selected = EQ (minibuf_window, selected_window);

Jim Blandy's avatar
Jim Blandy committed
946 947
  /* Don't let the frame remain selected.  */
  if (f == selected_frame)
948
    Fhandle_switch_frame (next_frame (frame, Qt), Qnil);
Jim Blandy's avatar
Jim Blandy committed
949

Jim Blandy's avatar
Jim Blandy committed
950 951
  /* Don't allow minibuf_window to remain on a deleted frame.  */
  if (EQ (f->minibuffer_window, minibuf_window))
Jim Blandy's avatar
Jim Blandy committed
952
    {
Jim Blandy's avatar
Jim Blandy committed
953
      Fset_window_buffer (selected_frame->minibuffer_window,
Jim Blandy's avatar
Jim Blandy committed
954
			  XWINDOW (minibuf_window)->buffer);
Jim Blandy's avatar
Jim Blandy committed
955
      minibuf_window = selected_frame->minibuffer_window;
956 957 958 959 960

      /* If the dying minibuffer window was selected,
	 select the new one.  */
      if (minibuffer_selected)
	Fselect_window (minibuf_window);
Jim Blandy's avatar
Jim Blandy committed
961 962
    }

963 964 965 966 967 968
  /* Clear any X selections for this frame.  */
#ifdef HAVE_X_WINDOWS
  if (FRAME_X_P (f))
    x_clear_frame_selections (f);
#endif

969 970 971 972 973
  /* Mark all the windows that used to be on FRAME as deleted, and then
     remove the reference to them.  */
  delete_all_subwindows (XWINDOW (f->root_window));
  f->root_window = Qnil;

Jim Blandy's avatar
Jim Blandy committed
974
  Vframe_list = Fdelq (frame, Vframe_list);
975
  FRAME_SET_VISIBLE (f, 0);
Jim Blandy's avatar
Jim Blandy committed
976

Karl Heuer's avatar
Karl Heuer committed
977 978
  if (f->namebuf)
    free (f->namebuf);
979 980 981 982 983 984 985 986 987
  if (FRAME_CURRENT_GLYPHS (f))
    free_frame_glyphs (f, FRAME_CURRENT_GLYPHS (f));
  if (FRAME_DESIRED_GLYPHS (f))
    free_frame_glyphs (f, FRAME_DESIRED_GLYPHS (f));
  if (FRAME_TEMP_GLYPHS (f))
    free_frame_glyphs (f, FRAME_TEMP_GLYPHS (f));
  if (FRAME_INSERT_COST (f))
    free (FRAME_INSERT_COST (f));
  if (FRAME_DELETEN_COST (f))
988
    free (FRAME_DELETEN_COST (f));
989
  if (FRAME_INSERTN_COST (f))
990
    free (FRAME_INSERTN_COST (f));
991
  if (FRAME_DELETE_COST (f))
992
    free (FRAME_DELETE_COST (f));
993

994 995 996 997 998
  /* Since some events are handled at the interrupt level, we may get
     an event for f at any time; if we zero out the frame's display
     now, then we may trip up the event-handling code.  Instead, we'll
     promise that the display of the frame must be valid until we have
     called the window-system-dependent frame destruction routine.  */
Jim Blandy's avatar
Jim Blandy committed
999 1000

  /* I think this should be done with a hook.  */
Jim Blandy's avatar
Jim Blandy committed
1001
#ifdef HAVE_X_WINDOWS
1002
  if (FRAME_X_P (f))
1003
    x_destroy_window (f);
Jim Blandy's avatar
Jim Blandy committed
1004 1005
#endif

1006 1007
  f->display.nothing = 0;