frame.c 200 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Generic frame functions.
Glenn Morris's avatar
Glenn Morris committed
2

Paul Eggert's avatar
Paul Eggert committed
3
Copyright (C) 1993-1995, 1997, 1999-2019 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
4 5 6

This file is part of GNU Emacs.

7
GNU Emacs is free software: you can redistribute it and/or modify
Jim Blandy's avatar
Jim Blandy committed
8
it under the terms of the GNU General Public License as published by
9 10
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
Jim Blandy's avatar
Jim Blandy committed
11 12 13 14 15 16 17

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
18
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
Jim Blandy's avatar
Jim Blandy committed
19

20
#include <config.h>
21 22

#include <stdio.h>
Paul Eggert's avatar
Paul Eggert committed
23
#include <stdlib.h>
24 25
#include <errno.h>
#include <limits.h>
26 27 28

#include <c-ctype.h>

29
#include "lisp.h"
30 31 32 33 34

#ifdef HAVE_WINDOW_SYSTEM
#include TERM_HEADER
#endif /* HAVE_WINDOW_SYSTEM */

35 36 37
#include "buffer.h"
/* These help us bind and responding to switch-frame events.  */
#include "keyboard.h"
38
#include "ptr-bounds.h"
39
#include "frame.h"
Kim F. Storm's avatar
Kim F. Storm committed
40
#include "blockinput.h"
41
#include "termchar.h"
42
#include "termhooks.h"
Andreas Schwab's avatar
Andreas Schwab committed
43
#include "dispextern.h"
44
#include "window.h"
Andreas Schwab's avatar
Andreas Schwab committed
45
#ifdef HAVE_WINDOW_SYSTEM
46 47
#include "fontset.h"
#endif
48
#include "cm.h"
Morten Welinder's avatar
Morten Welinder committed
49 50
#ifdef MSDOS
#include "msdos.h"
51
#include "dosfns.h"
Morten Welinder's avatar
Morten Welinder committed
52
#endif
Paul Eggert's avatar
Paul Eggert committed
53 54 55
#ifdef USE_X_TOOLKIT
#include "widget.h"
#endif
Daniel Colascione's avatar
Daniel Colascione committed
56
#include "pdumper.h"
Jim Blandy's avatar
Jim Blandy committed
57

58 59 60
/* The currently selected frame.  */
Lisp_Object selected_frame;

61 62 63
/* The selected frame the last time window change functions were run.  */
Lisp_Object old_selected_frame;

64 65 66 67 68
/* A frame which is not just a mini-buffer, or NULL if there are no such
   frames.  This is usually the most recent such frame that was selected.  */

static struct frame *last_nonminibuf_frame;

69
/* False means there are no visible garbaged frames.  */
70 71
bool frame_garbaged;

72
/* The default tool bar height for future frames.  */
73
#ifdef HAVE_EXT_TOOL_BAR
74 75
enum { frame_default_tool_bar_height = 0 };
#else
76
int frame_default_tool_bar_height;
77
#endif
78

79
#ifdef HAVE_WINDOW_SYSTEM
80
static void gui_report_frame_params (struct frame *, Lisp_Object *);
81 82
#endif

83
/* These setters are used only in this file, so they can be private.  */
84
static void
85 86 87 88
fset_buffer_predicate (struct frame *f, Lisp_Object val)
{
  f->buffer_predicate = val;
}
89
static void
90 91 92 93 94
fset_minibuffer_window (struct frame *f, Lisp_Object val)
{
  f->minibuffer_window = val;
}

95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112
struct frame *
decode_live_frame (register Lisp_Object frame)
{
  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame);
  return XFRAME (frame);
}

struct frame *
decode_any_frame (register Lisp_Object frame)
{
  if (NILP (frame))
    frame = selected_frame;
  CHECK_FRAME (frame);
  return XFRAME (frame);
}

113
#ifdef HAVE_WINDOW_SYSTEM
114
bool
115
display_available (void)
116
{
117
  return x_display_list != NULL;
118
}
119
#endif
120 121 122 123 124

struct frame *
decode_window_system_frame (Lisp_Object frame)
{
  struct frame *f = decode_live_frame (frame);
125 126
  check_window_system (f);
#ifdef HAVE_WINDOW_SYSTEM
127
  return f;
128
#endif
129 130 131 132 133
}

void
check_window_system (struct frame *f)
{
134 135 136 137 138 139
#ifdef HAVE_WINDOW_SYSTEM
  if (window_system_available (f))
    return;
#endif
  error (f ? "Window system frame should be used"
	 : "Window system is not in use or not initialized");
140 141
}

142
/* Return the value of frame parameter PROP in frame FRAME.  */
143

144
Lisp_Object
Paul Eggert's avatar
Paul Eggert committed
145
get_frame_param (struct frame *frame, Lisp_Object prop)
146
{
Paul Eggert's avatar
Paul Eggert committed
147
  return Fcdr (Fassq (prop, frame->param_alist));
148 149
}

150 151 152 153 154 155 156 157 158

void
frame_size_history_add (struct frame *f, Lisp_Object fun_symbol,
			int width, int height, Lisp_Object rest)
{
  Lisp_Object frame;

  XSETFRAME (frame, f);
  if (CONSP (frame_size_history)
159
      && FIXNUMP (XCAR (frame_size_history))
Tom Tromey's avatar
Tom Tromey committed
160
      && 0 < XFIXNUM (XCAR (frame_size_history)))
161
    frame_size_history =
Tom Tromey's avatar
Tom Tromey committed
162
      Fcons (make_fixnum (XFIXNUM (XCAR (frame_size_history)) - 1),
163 164 165
	     Fcons (list4
		    (frame, fun_symbol,
		     ((width > 0)
Paul Eggert's avatar
Paul Eggert committed
166 167
		      ? list4i (FRAME_TEXT_WIDTH (f), FRAME_TEXT_HEIGHT (f),
				width, height)
168 169
		      : Qnil),
		     rest),
170
		    XCDR (frame_size_history)));
171 172 173
}


174 175
/* Return 1 if `frame-inhibit-implied-resize' is non-nil or fullscreen
   state of frame F would be affected by a vertical (horizontal if
176 177
   HORIZONTAL is true) resize.  PARAMETER is the symbol of the frame
   parameter that is changed.  */
178
bool
179
frame_inhibit_resize (struct frame *f, bool horizontal, Lisp_Object parameter)
180
{
181 182
  Lisp_Object fullscreen = get_frame_param (f, Qfullscreen);
  bool inhibit
183 184 185 186 187
    = (f->after_make_frame
       ? (EQ (frame_inhibit_implied_resize, Qt)
	  || (CONSP (frame_inhibit_implied_resize)
	      && !NILP (Fmemq (parameter, frame_inhibit_implied_resize)))
	  || (horizontal
Paul Eggert's avatar
Paul Eggert committed
188
	      && !NILP (fullscreen) && !EQ (fullscreen, Qfullheight))
189
	  || (!horizontal
Paul Eggert's avatar
Paul Eggert committed
190
	      && !NILP (fullscreen) && !EQ (fullscreen, Qfullwidth))
191 192 193
	  || FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
       : ((horizontal && f->inhibit_horizontal_resize)
	  || (!horizontal && f->inhibit_vertical_resize)));
194 195 196 197 198 199 200 201 202
  if (inhibit && !FRAME_TERMCAP_P (f) && !FRAME_MSDOS_P (f))
    frame_size_history_add
      (f, Qframe_inhibit_resize, 0, 0,
       list5 (horizontal ? Qt : Qnil, parameter,
	      f->after_make_frame ? Qt : Qnil,
	      frame_inhibit_implied_resize,
	      fullscreen));

  return inhibit;
203 204
}

205
static void
206
set_menu_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
207 208 209 210 211 212
{
  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
213
     frame itself, and get an error because you can't switch buffers
214 215 216 217
     in or split the minibuffer window.  */
  if (FRAME_MINIBUF_ONLY_P (f))
    return;

218
  if (TYPE_RANGED_FIXNUMP (int, value))
Tom Tromey's avatar
Tom Tromey committed
219
    nlines = XFIXNUM (value);
220 221 222
  else
    nlines = 0;

223 224
  if (nlines != olines)
    {
225
      windows_or_buffers_changed = 14;
226
      FRAME_MENU_BAR_LINES (f) = nlines;
227
      FRAME_MENU_BAR_HEIGHT (f) = nlines * FRAME_LINE_HEIGHT (f);
228 229 230
      change_frame_size (f, FRAME_COLS (f),
			 FRAME_LINES (f) + olines - nlines,
			 0, 1, 0, 0);
231
    }
232 233 234 235
}

Lisp_Object Vframe_list;

Jim Blandy's avatar
Jim Blandy committed
236

Jim Blandy's avatar
Jim Blandy committed
237
DEFUN ("framep", Fframep, Sframep, 1, 1, 0,
238
       doc: /* Return non-nil if OBJECT is a frame.
239 240
Value is:
  t for a termcap frame (a character-only terminal),
241 242 243 244
 `x' for an Emacs frame that is really an X window,
 `w32' for an Emacs frame that is a window on MS-Windows display,
 `ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
 `pc' for a direct-write MS-DOS frame.
245
See also `frame-live-p'.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
246
  (Lisp_Object object)
Jim Blandy's avatar
Jim Blandy committed
247
{
248
  if (!FRAMEP (object))
Jim Blandy's avatar
Jim Blandy committed
249
    return Qnil;
Jim Blandy's avatar
Jim Blandy committed
250
  switch (XFRAME (object)->output_method)
Jim Blandy's avatar
Jim Blandy committed
251
    {
252
    case output_initial: /* The initial frame is like a termcap frame. */
Jim Blandy's avatar
Jim Blandy committed
253 254 255
    case output_termcap:
      return Qt;
    case output_x_window:
256
      return Qx;
257 258
    case output_w32:
      return Qw32;
259 260
    case output_msdos_raw:
      return Qpc;
261 262
    case output_ns:
      return Qns;
Jim Blandy's avatar
Jim Blandy committed
263
    default:
264
      emacs_abort ();
Jim Blandy's avatar
Jim Blandy committed
265 266 267
    }
}

Jim Blandy's avatar
Jim Blandy committed
268
DEFUN ("frame-live-p", Fframe_live_p, Sframe_live_p, 1, 1, 0,
269 270
       doc: /* Return non-nil if OBJECT is a frame which has not been deleted.
Value is nil if OBJECT is not a live frame.  If object is a live
271
frame, the return value indicates what sort of terminal device it is
Pavel Janík's avatar
Pavel Janík committed
272
displayed on.  See the documentation of `framep' for possible
Pavel Janík's avatar
Pavel Janík committed
273
return values.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
274
  (Lisp_Object object)
Jim Blandy's avatar
Jim Blandy committed
275
{
Jim Blandy's avatar
Jim Blandy committed
276 277 278
  return ((FRAMEP (object)
	   && FRAME_LIVE_P (XFRAME (object)))
	  ? Fframep (object)
Jim Blandy's avatar
Jim Blandy committed
279 280 281
	  : Qnil);
}

Paul Eggert's avatar
Paul Eggert committed
282
DEFUN ("window-system", Fwindow_system, Swindow_system, 0, 1, 0,
283
       doc: /* The name of the window system that FRAME is displaying through.
284 285
The value is a symbol:
 nil for a termcap frame (a character-only terminal),
286 287 288 289
 `x' for an Emacs frame that is really an X window,
 `w32' for an Emacs frame that is a window on MS-Windows display,
 `ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
 `pc' for a direct-write MS-DOS frame.
290 291 292 293 294 295

FRAME defaults to the currently selected frame.

Use of this function as a predicate is deprecated.  Instead,
use `display-graphic-p' or any of the other `display-*-p'
predicates which report frame's specific UI-related capabilities.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
296
  (Lisp_Object frame)
297 298 299 300 301 302 303 304 305 306 307 308 309 310
{
  Lisp_Object type;
  if (NILP (frame))
    frame = selected_frame;

  type = Fframep (frame);

  if (NILP (type))
    wrong_type_argument (Qframep, frame);

  if (EQ (type, Qt))
    return Qnil;
  else
    return type;
311
}
312

313 314 315
/* Placeholder used by temacs -nw before window.el is loaded.  */
DEFUN ("frame-windows-min-size", Fframe_windows_min_size,
       Sframe_windows_min_size, 4, 4, 0,
316
       doc: /* SKIP: real doc in window.el.  */
317
       attributes: const)
318 319 320
     (Lisp_Object frame, Lisp_Object horizontal,
      Lisp_Object ignore, Lisp_Object pixelwise)
{
321
  return make_fixnum (0);
322 323
}

324 325 326 327
/**
 * frame_windows_min_size:
 *
 * Return the minimum number of lines (columns if HORIZONTAL is non-nil)
328 329
 * of FRAME.  If PIXELWISE is non-nil, return the minimum inner height
 * (width) of FRAME in pixels.
330 331 332 333 334 335 336
 *
 * This value is calculated by the function `frame-windows-min-size' in
 * window.el unless the `min-height' (`min-width' if HORIZONTAL is
 * non-nil) parameter of FRAME is non-nil thus explicitly specifying the
 * value to be returned.  In that latter case IGNORE is ignored.
 *
 * If `frame-windows-min-size' is called, it will make sure that the
337
 * return value accommodates all windows of FRAME respecting the values
338 339 340
 * of `window-min-height' (`window-min-width' if HORIZONTAL is non-nil).
 * With IGNORE non-nil the values of these variables are ignored.
 *
341 342 343
 * In either case, never return a value less than 1.  For TTY frames,
 * additionally limit the minimum frame height to a value large enough
 * to support the menu bar, the mode line, and the echo area.
344
 */
345
static int
346 347
frame_windows_min_size (Lisp_Object frame, Lisp_Object horizontal,
			Lisp_Object ignore, Lisp_Object pixelwise)
348
{
349 350
  struct frame *f = XFRAME (frame);
  Lisp_Object par_size;
351
  int retval;
352 353

  if ((!NILP (horizontal)
354 355 356
       && RANGED_FIXNUMP (INT_MIN,
			  par_size = get_frame_param (f, Qmin_width),
			  INT_MAX))
357
      || (NILP (horizontal)
358 359 360
	  && RANGED_FIXNUMP (INT_MIN,
			     par_size = get_frame_param (f, Qmin_height),
			     INT_MAX)))
361
    {
Tom Tromey's avatar
Tom Tromey committed
362
      int min_size = XFIXNUM (par_size);
363 364 365 366 367

      /* Don't allow phantom frames.  */
      if (min_size < 1)
	min_size = 1;

368 369 370 371 372
      retval = (NILP (pixelwise)
		? min_size
		: min_size * (NILP (horizontal)
			      ? FRAME_LINE_HEIGHT (f)
			      : FRAME_COLUMN_WIDTH (f)));
373 374
    }
  else
Tom Tromey's avatar
Tom Tromey committed
375
    retval = XFIXNUM (call4 (Qframe_windows_min_size, frame, horizontal,
376 377 378 379 380 381 382 383 384 385 386 387 388
			  ignore, pixelwise));
  /* Don't allow too small height of text-mode frames, or else cm.c
     might abort in cmcheckmagic.  */
  if ((FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) && NILP (horizontal))
    {
      int min_height = (FRAME_MENU_BAR_LINES (f)
			+ FRAME_WANTS_MODELINE_P (f)
			+ 2);	/* one text line and one echo-area line */
      if (retval < min_height)
	retval = min_height;
    }

  return retval;
389 390 391
}


392 393 394 395 396
#ifdef HAVE_WINDOW_SYSTEM
/**
 * keep_ratio:
 *
 * Preserve ratios of frame F which usually happens after its parent
397
 * frame P got resized.  OLD_WIDTH, OLD_HEIGHT specifies the old native
398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421
 * size of F's parent, NEW_WIDTH and NEW_HEIGHT its new size.
 *
 * Adjust F's width if F's 'keep_ratio' parameter is non-nil and, if
 * it is a cons, its car is not 'height-only'.  Adjust F's height if F's
 * 'keep_ratio' parameter is non-nil and, if it is a cons, its car
 * is not 'width-only'.
 *
 * Adjust F's left position if F's 'keep_ratio' parameter is non-nil
 * and, if its is a cons, its cdr is non-nil and not 'top-only'.  Adjust
 * F's top position if F's 'keep_ratio' parameter is non-nil and, if
 * its is a cons, its cdr is non-nil and not 'left-only'.
 *
 * Note that when positional adjustment is requested but the size of F
 * should remain unaltered in the corresponding direction, this routine
 * tries to constrain F to its parent frame - something which usually
 * happens when the parent frame shrinks.  This means, however, that
 * when the parent frame is re-enlarged later, the child's original
 * position will not get restored to its pre-shrinking value.
 *
 * This routine is currently useful for child frames only.  It might be
 * eventually useful when moving non-child frames between monitors with
 * different resolutions.
 */
static void
422 423
keep_ratio (struct frame *f, struct frame *p, int old_width, int old_height,
	    int new_width, int new_height)
424 425
{
  Lisp_Object keep_ratio = get_frame_param (f, Qkeep_ratio);
426 427


428 429 430 431 432
  if (!NILP (keep_ratio))
    {
      double width_factor = (double)new_width / (double)old_width;
      double height_factor = (double)new_height / (double)old_height;
      int pixel_width, pixel_height, pos_x, pos_y;
433

434 435 436 437 438 439 440
      if (!CONSP (keep_ratio) || !NILP (Fcdr (keep_ratio)))
	{
	  if (CONSP (keep_ratio) && EQ (Fcdr (keep_ratio), Qtop_only))
	    pos_x = f->left_pos;
	  else
	    {
	      pos_x = (int)(f->left_pos * width_factor + 0.5);
441

442 443 444 445
	      if (CONSP (keep_ratio)
		  && (NILP (Fcar (keep_ratio))
		      || EQ (Fcar (keep_ratio), Qheight_only))
		  && p->pixel_width - f->pixel_width < pos_x)
446
		{
447
		  int p_f_width = p->pixel_width - f->pixel_width;
448

449 450 451 452
		  if (p_f_width <= 0)
		    pos_x = 0;
		  else
		    pos_x = (int)(p_f_width * width_factor * 0.5 + 0.5);
453 454 455 456 457 458 459 460 461 462 463
		}

	      f->left_pos = pos_x;
	    }

	  if (CONSP (keep_ratio) && EQ (Fcdr (keep_ratio), Qleft_only))
	    pos_y = f->top_pos;
	  else
	    {
	      pos_y = (int)(f->top_pos * height_factor + 0.5);

464 465 466 467
	      if (CONSP (keep_ratio)
		  && (NILP (Fcar (keep_ratio))
		      || EQ (Fcar (keep_ratio), Qwidth_only))
		  && p->pixel_height - f->pixel_height < pos_y)
468 469 470 471 472 473
		/* When positional adjustment was requested and the
		   width of F should remain unaltered, try to constrain
		   F to its parent.  This means that when the parent
		   frame is enlarged later the child's original position
		   won't get restored.  */
		{
474
		  int p_f_height = p->pixel_height - f->pixel_height;
475

476 477 478 479
		  if (p_f_height <= 0)
		    pos_y = 0;
		  else
		    pos_y = (int)(p_f_height * height_factor * 0.5 + 0.5);
480
		}
481

482 483
	      f->top_pos = pos_y;
	    }
484

485 486
          if (FRAME_TERMINAL (f)->set_frame_offset_hook)
            FRAME_TERMINAL (f)->set_frame_offset_hook (f, pos_x, pos_y, -1);
487
	}
488

489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521
      if (!CONSP (keep_ratio) || !NILP (Fcar (keep_ratio)))
	{
	  if (CONSP (keep_ratio) && EQ (Fcar (keep_ratio), Qheight_only))
	    pixel_width = -1;
	  else
	    {
	      pixel_width = (int)(f->pixel_width * width_factor + 0.5);
	      pixel_width = FRAME_PIXEL_TO_TEXT_WIDTH (f, pixel_width);
	    }

	  if (CONSP (keep_ratio) && EQ (Fcar (keep_ratio), Qwidth_only))
	    pixel_height = -1;
	  else
	    {
	      pixel_height = (int)(f->pixel_height * height_factor + 0.5);
	      pixel_height = FRAME_PIXEL_TO_TEXT_HEIGHT (f, pixel_height);
	    }

	  adjust_frame_size (f, pixel_width, pixel_height, 1, 0,
			     Qkeep_ratio);
	}
    }
}
#endif


/**
 * adjust_frame_size:
 *
 * Adjust size of frame F.  NEW_WIDTH and NEW_HEIGHT specify the new
 * text size of F in pixels.  A value of -1 means no change is requested
 * for that direction (but the frame may still have to be resized to
 * accommodate windows with their minimum sizes).  This can either issue
522
 * a request to resize the frame externally (via set_window_size_hook), to
523 524 525 526 527
 * resize the frame internally (via resize_frame_windows) or do nothing
 * at all.
 *
 * The argument INHIBIT can assume the following values:
 *
528
 * 0 means to unconditionally call set_window_size_hook even if sizes
529 530 531
 *   apparently do not change.  Fx_create_frame uses this to pass the
 *   initial size to the window manager.
 *
532
 * 1 means to call set_window_size_hook if the native frame size really
533 534
 *   changes.  Fset_frame_size, Fset_frame_height, ... use this.
 *
535
 * 2 means to call set_window_size_hook provided frame_inhibit_resize
536 537 538 539
 *   allows it.  The menu and tool bar code use this ("3" won't work
 *   here in general because menu and tool bar are often not counted in
 *   the frame's text height).
 *
540 541 542 543
 * 3 means call set_window_size_hook if window minimum sizes must be
 *   preserved or frame_inhibit_resize allows it.
 *   gui_set_left_fringe, gui_set_scroll_bar_width, gui_new_font
 *   ... use (or should use) this.
544
 *
545 546 547
 * 4 means call set_window_size_hook only if window minimum sizes must
 *   be preserved.  x_set_right_divider_width, x_set_border_width and
 *   the code responsible for wrapping the tool bar use this.
548
 *
549
 * 5 means to never call set_window_size_hook.  change_frame_size uses
550 551
 *   this.
 *
552
 * Note that even when set_window_size_hook is not called, individual
553 554 555 556 557 558 559 560
 * windows may have to be resized (via `window--sanitize-window-sizes')
 * in order to support minimum size constraints.
 *
 * PRETEND is as for change_frame_size.  PARAMETER, if non-nil, is the
 * symbol of the parameter changed (like `menu-bar-lines', `font', ...).
 * This is passed on to frame_inhibit_resize to let the latter decide on
 * a case-by-case basis whether the frame may be resized externally.
 */
561
void
562 563
adjust_frame_size (struct frame *f, int new_width, int new_height, int inhibit,
		   bool pretend, Lisp_Object parameter)
564 565 566 567 568
{
  int unit_width = FRAME_COLUMN_WIDTH (f);
  int unit_height = FRAME_LINE_HEIGHT (f);
  int old_pixel_width = FRAME_PIXEL_WIDTH (f);
  int old_pixel_height = FRAME_PIXEL_HEIGHT (f);
569 570
  int old_cols = FRAME_COLS (f);
  int old_lines = FRAME_LINES (f);
571 572 573 574
  int new_pixel_width, new_pixel_height;
  /* The following two values are calculated from the old frame pixel
     sizes and any "new" settings for tool bar, menu bar and internal
     borders.  We do it this way to detect whether we have to call
575
     set_window_size_hook as consequence of the new settings.  */
576 577 578 579 580 581 582 583
  int windows_width = FRAME_WINDOWS_WIDTH (f);
  int windows_height = FRAME_WINDOWS_HEIGHT (f);
  int min_windows_width, min_windows_height;
  /* These are a bit tedious, maybe we should use a macro.  */
  struct window *r = XWINDOW (FRAME_ROOT_WINDOW (f));
  int old_windows_width = WINDOW_PIXEL_WIDTH (r);
  int old_windows_height
    = (WINDOW_PIXEL_HEIGHT (r)
584
       + ((FRAME_HAS_MINIBUF_P (f) && !FRAME_MINIBUF_ONLY_P (f))
585 586 587 588 589 590 591 592 593 594 595 596 597
	  ? WINDOW_PIXEL_HEIGHT (XWINDOW (FRAME_MINIBUF_WINDOW (f)))
	  : 0));
  int new_windows_width, new_windows_height;
  int old_text_width = FRAME_TEXT_WIDTH (f);
  int old_text_height = FRAME_TEXT_HEIGHT (f);
  /* If a size is < 0 use the old value.  */
  int new_text_width = (new_width >= 0) ? new_width : old_text_width;
  int new_text_height = (new_height >= 0) ? new_height : old_text_height;
  int new_cols, new_lines;
  bool inhibit_horizontal, inhibit_vertical;
  Lisp_Object frame;

  XSETFRAME (frame, f);
598

599 600
  frame_size_history_add
    (f, Qadjust_frame_size_1, new_text_width, new_text_height,
601
     list2 (parameter, make_fixnum (inhibit)));
602

603 604 605
  /* The following two values are calculated from the old window body
     sizes and any "new" settings for scroll bars, dividers, fringes and
     margins (though the latter should have been processed already).  */
606 607 608 609
  min_windows_width
    = frame_windows_min_size (frame, Qt, (inhibit == 5) ? Qt : Qnil, Qt);
  min_windows_height
    = frame_windows_min_size (frame, Qnil, (inhibit == 5) ? Qt : Qnil, Qt);
610 611

  if (inhibit >= 2 && inhibit <= 4)
612
    /* When INHIBIT is in [2..4] inhibit if the "old" window sizes stay
613 614
       within the limits and either resizing is inhibited or INHIBIT
       equals 4.  */
615
    {
616 617 618 619 620 621
      inhibit_horizontal = (windows_width >= min_windows_width
                            && (inhibit == 4
                                || frame_inhibit_resize (f, true, parameter)));
      inhibit_vertical = (windows_height >= min_windows_height
                          && (inhibit == 4
                              || frame_inhibit_resize (f, false, parameter)));
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
    }
  else
    /* Otherwise inhibit if INHIBIT equals 5.  */
    inhibit_horizontal = inhibit_vertical = inhibit == 5;

  new_pixel_width = ((inhibit_horizontal && (inhibit < 5))
		     ? old_pixel_width
		     : max (FRAME_TEXT_TO_PIXEL_WIDTH (f, new_text_width),
			    min_windows_width
			    + 2 * FRAME_INTERNAL_BORDER_WIDTH (f)));
  new_windows_width = new_pixel_width - 2 * FRAME_INTERNAL_BORDER_WIDTH (f);
  new_text_width = FRAME_PIXEL_TO_TEXT_WIDTH (f, new_pixel_width);
  new_cols = new_text_width / unit_width;

  new_pixel_height = ((inhibit_vertical && (inhibit < 5))
		      ? old_pixel_height
		      : max (FRAME_TEXT_TO_PIXEL_HEIGHT (f, new_text_height),
			     min_windows_height
			     + FRAME_TOP_MARGIN_HEIGHT (f)
			     + 2 * FRAME_INTERNAL_BORDER_WIDTH (f)));
  new_windows_height = (new_pixel_height
			- FRAME_TOP_MARGIN_HEIGHT (f)
			- 2 * FRAME_INTERNAL_BORDER_WIDTH (f));
  new_text_height = FRAME_PIXEL_TO_TEXT_HEIGHT (f, new_pixel_height);
  new_lines = new_text_height / unit_height;

#ifdef HAVE_WINDOW_SYSTEM
649
  if (FRAME_WINDOW_P (f)
650
      && f->can_set_window_size
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
      && ((!inhibit_horizontal
	   && (new_pixel_width != old_pixel_width
	       || inhibit == 0 || inhibit == 2))
	  || (!inhibit_vertical
	      && (new_pixel_height != old_pixel_height
		  || inhibit == 0 || inhibit == 2))))
    /* We are either allowed to change the frame size or the minimum
       sizes request such a change.  Do not care for fixing minimum
       sizes here, we do that eventually when we're called from
       change_frame_size.  */
    {
      /* Make sure we respect fullheight and fullwidth.  */
      if (inhibit_horizontal)
	new_text_width = old_text_width;
      else if (inhibit_vertical)
	new_text_height = old_text_height;

668 669 670 671
      frame_size_history_add
	(f, Qadjust_frame_size_2, new_text_width, new_text_height,
	 list2 (inhibit_horizontal ? Qt : Qnil,
		inhibit_vertical ? Qt : Qnil));
672

673 674 675 676 677 678
      if (FRAME_TERMINAL (f)->set_window_size_hook)
        FRAME_TERMINAL (f)->set_window_size_hook (f,
                                                  0,
                                                  new_text_width,
                                                  new_text_height,
                                                  1);
679 680 681 682 683 684 685 686 687 688 689
      f->resized_p = true;

      return;
    }
#endif

  if (new_text_width == old_text_width
      && new_text_height == old_text_height
      && new_windows_width == old_windows_width
      && new_windows_height == old_windows_height
      && new_pixel_width == old_pixel_width
690 691 692
      && new_pixel_height == old_pixel_height
      && new_cols == old_cols
      && new_lines == old_lines)
693 694
    /* No change.  Sanitize window sizes and return.  */
    {
695 696
      sanitize_window_sizes (Qt);
      sanitize_window_sizes (Qnil);
697 698 699 700 701 702 703

      return;
    }

  block_input ();

#ifdef MSDOS
Eli Zaretskii's avatar
Eli Zaretskii committed
704 705 706 707 708 709 710
  /* We only can set screen dimensions to certain values supported by
     our video hardware.  Try to find the smallest size greater or
     equal to the requested dimensions, while accounting for the fact
     that the menu-bar lines are not counted in the frame height.  */
  int dos_new_lines = new_lines + FRAME_TOP_MARGIN (f);
  dos_set_window_size (&dos_new_lines, &new_cols);
  new_lines = dos_new_lines - FRAME_TOP_MARGIN (f);
711 712 713 714 715 716 717 718 719 720 721
#endif

  if (new_windows_width != old_windows_width)
    {
      resize_frame_windows (f, new_windows_width, 1, 1);

      /* MSDOS frames cannot PRETEND, as they change frame size by
	 manipulating video hardware.  */
      if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f))
	FrameCols (FRAME_TTY (f)) = new_cols;

722
#if defined (HAVE_WINDOW_SYSTEM) && ! defined (HAVE_EXT_TOOL_BAR)
723 724 725 726 727 728 729 730
      if (WINDOWP (f->tool_bar_window))
	{
	  XWINDOW (f->tool_bar_window)->pixel_width = new_windows_width;
	  XWINDOW (f->tool_bar_window)->total_cols
	    = new_windows_width / unit_width;
	}
#endif
    }
731
  else if (new_cols != old_cols)
732
    call2 (Qwindow__pixel_to_total, frame, Qt);
733 734 735 736 737 738 739 740 741 742 743 744

  if (new_windows_height != old_windows_height
      /* When the top margin has changed we have to recalculate the top
	 edges of all windows.  No such calculation is necessary for the
	 left edges.  */
      || WINDOW_TOP_PIXEL_EDGE (r) != FRAME_TOP_MARGIN_HEIGHT (f))
    {
      resize_frame_windows (f, new_windows_height, 0, 1);

      /* MSDOS frames cannot PRETEND, as they change frame size by
	 manipulating video hardware.  */
      if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f))
745
	FrameRows (FRAME_TTY (f)) = new_lines + FRAME_TOP_MARGIN (f);
746
    }
747
  else if (new_lines != old_lines)
748
    call2 (Qwindow__pixel_to_total, frame, Qnil);
749

750 751
  frame_size_history_add
    (f, Qadjust_frame_size_3, new_text_width, new_text_height,
Paul Eggert's avatar
Paul Eggert committed
752 753
     list4i (old_pixel_width, old_pixel_height,
	     new_pixel_width, new_pixel_height));
754

755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
  /* Assign new sizes.  */
  FRAME_TEXT_WIDTH (f) = new_text_width;
  FRAME_TEXT_HEIGHT (f) = new_text_height;
  FRAME_PIXEL_WIDTH (f) = new_pixel_width;
  FRAME_PIXEL_HEIGHT (f) = new_pixel_height;
  SET_FRAME_COLS (f, new_cols);
  SET_FRAME_LINES (f, new_lines);

  {
    struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f));
    int text_area_x, text_area_y, text_area_width, text_area_height;

    window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width,
		&text_area_height);
    if (w->cursor.x >= text_area_x + text_area_width)
      w->cursor.hpos = w->cursor.x = 0;
    if (w->cursor.y >= text_area_y + text_area_height)
      w->cursor.vpos = w->cursor.y = 0;
  }

  /* Sanitize window sizes.  */
776 777
  sanitize_window_sizes (Qt);
  sanitize_window_sizes (Qnil);
778 779 780 781 782 783 784 785 786 787 788

  adjust_frame_glyphs (f);
  calculate_costs (f);
  SET_FRAME_GARBAGED (f);

  /* A frame was "resized" if one of its pixelsizes changed, even if its
     X window wasn't resized at all.  */
  f->resized_p = (new_pixel_width != old_pixel_width
		  || new_pixel_height != old_pixel_height);

  unblock_input ();
789 790 791 792 793 794 795 796

#ifdef HAVE_WINDOW_SYSTEM
  {
    /* Adjust size of F's child frames.  */
    Lisp_Object frames, frame1;

    FOR_EACH_FRAME (frames, frame1)
      if (FRAME_PARENT_FRAME (XFRAME (frame1)) == f)
797 798
	keep_ratio (XFRAME (frame1), f, old_pixel_width, old_pixel_height,
		    new_pixel_width, new_pixel_height);
799 800
  }
#endif
801 802
}

803 804 805 806 807
/* Allocate basically initialized frame.  */

static struct frame *
allocate_frame (void)
{
808 809
  return ALLOCATE_ZEROED_PSEUDOVECTOR (struct frame, tool_bar_items,
				       PVEC_FRAME);
810
}
811

Jim Blandy's avatar
Jim Blandy committed
812
struct frame *
813
make_frame (bool mini_p)
Jim Blandy's avatar
Jim Blandy committed
814
{
Jim Blandy's avatar
Jim Blandy committed
815
  Lisp_Object frame;
816
  struct frame *f;
Paul Eggert's avatar
Paul Eggert committed
817
  struct window *rw, *mw UNINIT;
818 819
  Lisp_Object root_window;
  Lisp_Object mini_window;
820 821

  f = allocate_frame ();
822
  XSETFRAME (frame, f);
Jim Blandy's avatar
Jim Blandy committed
823

824
#ifdef USE_GTK
825 826
  /* Initialize Lisp data.  Note that allocate_frame initializes all
     Lisp data to nil, so do it only for slots which should not be nil.  */
827
  fset_tool_bar_position (f, Qtop);
828
#endif
829 830 831 832 833

  /* Initialize non-Lisp data.  Note that allocate_frame zeroes out all
     non-Lisp data, so do it only for slots which should not be zero.
     To avoid subtle bugs and for the sake of readability, it's better to
     initialize enum members explicitly even if their values are zero.  */
834 835 836
  f->wants_modeline = true;
  f->redisplay = true;
  f->garbaged = true;
837
  f->can_set_window_size = false;
838
  f->after_make_frame = false;
839 840 841 842
  f->inhibit_horizontal_resize = false;
  f->inhibit_vertical_resize = false;
  f->tool_bar_redisplayed = false;
  f->tool_bar_resized = false;
843 844
  f->column_width = 1;  /* !FRAME_WINDOW_P value.  */
  f->line_height = 1;  /* !FRAME_WINDOW_P value.  */
845
#ifdef HAVE_WINDOW_SYSTEM
846
  f->vertical_scroll_bar_type = vertical_scroll_bar_none;
847
  f->horizontal_scroll_bars = false;
848
  f->want_fullscreen = FULLSCREEN_NONE;
849
  f->undecorated = false;
850
  f->no_special_glyphs = false;
851 852 853 854 855 856 857
#ifndef HAVE_NTGUI
  f->override_redirect = false;
#endif
  f->skip_taskbar = false;
  f->no_focus_on_map = false;
  f->no_accept_focus = false;
  f->z_group = z_group_none;
858
  f->tooltip = false;
859
#ifndef HAVE_EXT_TOOL_BAR
860 861
  f->last_tool_bar_item = -1;
#endif
862 863 864 865
#ifdef NS_IMPL_COCOA
  f->ns_appearance = ns_appearance_aqua;
  f->ns_transparent_titlebar = false;
#endif
866
#endif
867 868
  /* This one should never be zero.  */
  f->change_stamp = 1;
869
  root_window = make_window ();
870
  rw = XWINDOW (root_window);
Jim Blandy's avatar
Jim Blandy committed
871 872
  if (mini_p)
    {
873
      mini_window = make_window ();
874 875 876 877 878
      mw = XWINDOW (mini_window);
      wset_next (rw, mini_window);
      wset_prev (mw, root_window);
      mw->mini = 1;
      wset_frame (mw, frame);
879
      fset_minibuffer_window (f, mini_window);
880
      store_frame_param (f, Qminibuffer, Qt);
Jim Blandy's avatar
Jim Blandy committed
881 882 883 884
    }
  else
    {
      mini_window = Qnil;
885
      wset_next (rw, Qnil);
886
      fset_minibuffer_window (f, Qnil);
Jim Blandy's avatar
Jim Blandy committed
887 888
    }

889
  wset_frame (rw, frame);
Jim Blandy's avatar
Jim Blandy committed
890 891 892

  /* 10 is arbitrary,
     just so that there is "something there."
893
     Correct size will be set up later with adjust_frame_size.  */
Jim Blandy's avatar
Jim Blandy committed
894

895
  SET_FRAME_COLS (f, 10);
896
  SET_FRAME_LINES (f, 10);
897 898
  SET_FRAME_WIDTH (f, FRAME_COLS (f) * FRAME_COLUMN_WIDTH (f));
  SET_FRAME_HEIGHT (f, FRAME_LINES (f) * FRAME_LINE_HEIGHT (f));
Jim Blandy's avatar
Jim Blandy committed
899

900 901 902 903
  rw->total_cols = 10;
  rw->pixel_width = rw->total_cols * FRAME_COLUMN_WIDTH (f);
  rw->total_lines = mini_p ? 9 : 10;
  rw->pixel_height = rw->total_lines * FRAME_LINE_HEIGHT (f);
Jim Blandy's avatar
Jim Blandy committed
904 905 906

  if (mini_p)
    {
907 908 909 910 911 912
      mw->top_line = rw->total_lines;
      mw->pixel_top = rw->pixel_height;
      mw->total_cols = rw->total_cols;
      mw->pixel_width = rw->pixel_width;
      mw->total_lines = 1;
      mw->pixel_height = FRAME_LINE_HEIGHT (f);
Jim Blandy's avatar
Jim Blandy committed
913 914
    }

Jim Blandy's avatar
Jim Blandy committed
915
  /* Choose a buffer for the frame's root window.  */
Jim Blandy's avatar
Jim Blandy committed
916
  {
917
    Lisp_Object buf = Fcurrent_buffer ();
Jim Blandy's avatar
Jim Blandy committed
918

919 920
    /* If current buffer is hidden, try to find another one.  */
    if (BUFFER_HIDDEN_P (XBUFFER (buf)))
921
      buf = other_buffer_safely (buf);
922

923 924
    /* Use set_window_buffer, not Fset_window_buffer, and don't let
       hooks be run by it.  The reason is that the whole frame/window
Juanma Barranquero's avatar
Juanma Barranquero committed
925
       arrangement is not yet fully initialized at this point.  Windows
926 927 928
       don't have the right size, glyph matrices aren't initialized
       etc.  Running Lisp functions at this point surely ends in a
       SEGV.  */
929
    set_window_buffer (root_window, buf, 0, 0);
930
    fset_buffer_list (f, list1 (buf));
Jim Blandy's avatar
Jim Blandy committed
931 932
  }

Jim Blandy's avatar
Jim Blandy committed
933
  if (mini_p)
934 935 936 937 938 939 940 941 942
    {
      set_window_buffer (mini_window,
			 (NILP (Vminibuffer_list)
			  ? get_minibuffer (0)
			  : Fcar (Vminibuffer_list)),
			 0, 0);
      /* No horizontal scroll bars in minibuffers.  */
      wset_horizontal_scroll_bar (mw, Qnil);
    }
Jim Blandy's avatar
Jim Blandy committed
943

944 945
  fset_root_window (f, root_window);
  fset_selected_window (f, root_window);
Jim Blandy's avatar
Jim Blandy committed
946 947
  /* Make sure this window seems more recently used than
     a newly-created, never-selected window.  */
948
  XWINDOW (f->selected_window)->use_time = ++window_select_count;
Jim Blandy's avatar
Jim Blandy committed
949

Jim Blandy's avatar
Jim Blandy committed
950
  return f;
Jim Blandy's avatar
Jim Blandy committed
951 952
}

953
#ifdef HAVE_WINDOW_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
954
/* Make a frame using a separate minibuffer window on another frame.
Jim Blandy's avatar
Jim Blandy committed
955 956 957
   MINI_WINDOW is the minibuffer window to use.  nil means use the
   default (the global minibuffer).  */

Jim Blandy's avatar
Jim Blandy committed
958
struct frame *
959 960
make_frame_without_minibuffer (Lisp_Object mini_window, KBOARD *kb,
			       Lisp_Object display)
Jim Blandy's avatar
Jim Blandy committed
961
{
962
  struct frame *f;
Jim Blandy's avatar
Jim Blandy committed
963

964
  if (!NILP (mini_window))
965
    CHECK_LIVE_WINDOW (mini_window);
Jim Blandy's avatar
Jim Blandy committed
966

967
  if (!NILP (mini_window)
968
      && FRAME_KBOARD (XFRAME (XWINDOW (mini_window)->frame)) != kb)
969
    error ("Frame and minibuffer must be on the same terminal");
970

Jim Blandy's avatar
Jim Blandy committed
971 972
  /* Make a frame containing just a root window.  */
  f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
973

974 975 976
  if (NILP (mini_window))
    {
      /* Use default-minibuffer-frame if possible.  */
977 978
      if (!FRAMEP (KVAR (kb, Vdefault_minibuffer_frame))
	  || ! FRAME_LIVE_P (XFRAME (KVAR (kb, Vdefault_minibuffer_frame))))
979
	{
980 981 982
          Lisp_Object frame_dummy;

          XSETFRAME (frame_dummy, f);
983
	  /* If there's no minibuffer frame to use, create one.  */
Paul Eggert's avatar
Paul Eggert committed
984 985
	  kset_default_minibuffer_frame
	    (kb, call1 (intern ("make-initial-minibuffer-frame"), display));
986
	}
987

988 989
      mini_window
	= XFRAME (KVAR (kb, Vdefault_minibuffer_frame))->minibuffer_window;
990
    }
991

992
  fset_minibuffer_window (f, mini_window);
993
  store_frame_param (f, Qminibuffer, mini_window);
994 995 996

  /* Make the chosen minibuffer window display the proper minibuffer,
     unless it is already showing a minibuffer.  */
997
  if (NILP (Fmemq (XWINDOW (mini_window)->contents, Vminibuffer_list)))
998 999 1000 1001 1002 1003
    /* Use set_window_buffer instead of Fset_window_buffer (see
       discussion of bug#11984, bug#12025, bug#12026).  */
    set_window_buffer (mini_window,
		       (NILP (Vminibuffer_list)
			? get_minibuffer (0)
			: Fcar (Vminibuffer_list)), 0, 0);
Jim Blandy's avatar
Jim Blandy committed
1004
  return f;
Jim Blandy's avatar
Jim Blandy committed
1005 1006
}

Jim Blandy's avatar
Jim Blandy committed
1007
/* Make a frame containing only a minibuffer window.  */
Jim Blandy's avatar
Jim Blandy committed
1008

Jim Blandy's avatar
Jim Blandy committed
1009
struct frame *
1010
make_minibuffer_frame (void)
Jim Blandy's avatar
Jim Blandy committed
1011
{
Jim Blandy's avatar
Jim Blandy committed
1012
  /* First make a frame containing just a root window, no minibuffer.  */
Jim Blandy's avatar
Jim Blandy committed
1013

Jim Blandy's avatar
Jim Blandy committed
1014
  register struct frame *f = make_frame (0);
Jim Blandy's avatar
Jim Blandy committed
1015
  register Lisp_Object mini_window;
Jim Blandy's avatar
Jim Blandy committed
1016
  register Lisp_Object frame;
Jim Blandy's avatar
Jim Blandy committed
1017

1018
  XSETFRAME (frame, f);