1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,97,1998 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "dispextern.h"
33 #include "blockinput.h"
34 #include "intervals.h"
38 #endif /* HAVE_X_WINDOWS */
47 #define max(a, b) ((a) < (b) ? (b) : (a))
51 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
52 Lisp_Object Qwindow_size_fixed
, Qleft_bitmap_area
, Qright_bitmap_area
;
53 extern Lisp_Object Qheight
, Qwidth
;
55 static struct window
*decode_window
P_ ((Lisp_Object
));
56 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
57 static int count_windows
P_ ((struct window
*));
58 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
59 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
60 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
61 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
62 static int window_min_size_1
P_ ((struct window
*, int));
63 static int window_min_size
P_ ((struct window
*, int, int, int *));
64 static void size_window
P_ ((Lisp_Object
, int, int, int));
65 static int freeze_window_start
P_ ((struct window
*, void *));
66 static int window_fixed_size_p
P_ ((struct window
*, int, int));
67 static void enlarge_window
P_ ((Lisp_Object
, int, int));
68 static Lisp_Object window_list
P_ ((void));
69 static int add_window_to_list
P_ ((struct window
*, void *));
70 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
72 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
74 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
76 static int foreach_window_1
P_ ((struct window
*,
77 int (* fn
) (struct window
*, void *),
80 /* This is the window in which the terminal's cursor should
81 be left when nothing is being done with it. This must
82 always be a leaf window, and its buffer is selected by
83 the top level editing loop at the end of each command.
85 This value is always the same as
86 FRAME_SELECTED_WINDOW (selected_frame). */
88 Lisp_Object selected_window
;
90 /* A list of all windows for use by next_window and Fwindow_list.
91 Functions creating or deleting windows should invalidate this cache
92 by setting it to nil. */
94 Lisp_Object Vwindow_list
;
96 /* The mini-buffer window of the selected frame.
97 Note that you cannot test for mini-bufferness of an arbitrary window
98 by comparing against this; but you can test for mini-bufferness of
99 the selected window. */
101 Lisp_Object minibuf_window
;
103 /* Non-nil means it is the window for C-M-v to scroll
104 when the mini-buffer is selected. */
106 Lisp_Object Vminibuf_scroll_window
;
108 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
110 Lisp_Object Vother_window_scroll_buffer
;
112 /* Non-nil means it's function to call to display temp buffers. */
114 Lisp_Object Vtemp_buffer_show_function
;
116 /* If a window gets smaller than either of these, it is removed. */
118 int window_min_height
;
119 int window_min_width
;
121 /* Nonzero implies Fdisplay_buffer should create windows. */
125 /* Nonzero implies make new frames for Fdisplay_buffer. */
129 /* Non-nil means use this function instead of default */
131 Lisp_Object Vpop_up_frame_function
;
133 /* Function to call to handle Fdisplay_buffer. */
135 Lisp_Object Vdisplay_buffer_function
;
137 /* List of buffer *names* for buffers that should have their own frames. */
139 Lisp_Object Vspecial_display_buffer_names
;
141 /* List of regexps for buffer names that should have their own frames. */
143 Lisp_Object Vspecial_display_regexps
;
145 /* Function to pop up a special frame. */
147 Lisp_Object Vspecial_display_function
;
149 /* List of buffer *names* for buffers to appear in selected window. */
151 Lisp_Object Vsame_window_buffer_names
;
153 /* List of regexps for buffer names to appear in selected window. */
155 Lisp_Object Vsame_window_regexps
;
157 /* Hook run at end of temp_output_buffer_show. */
159 Lisp_Object Qtemp_buffer_show_hook
;
161 /* Fdisplay_buffer always splits the largest window
162 if that window is more than this high. */
164 int split_height_threshold
;
166 /* Number of lines of continuity in scrolling by screenfuls. */
168 int next_screen_context_lines
;
170 /* Incremented for each window created. */
172 static int sequence_number
;
174 /* Nonzero after init_window_once has finished. */
176 static int window_initialized
;
178 /* Hook to run when window config changes. */
180 Lisp_Object Qwindow_configuration_change_hook
;
181 Lisp_Object Vwindow_configuration_change_hook
;
183 /* Nonzero means scroll commands try to put point
184 at the same screen height as previously. */
186 Lisp_Object Vscroll_preserve_screen_position
;
188 #if 0 /* This isn't used anywhere. */
189 /* Nonzero means we can split a frame even if it is "unsplittable". */
190 static int inhibit_frame_unsplittable
;
193 #define min(a, b) ((a) < (b) ? (a) : (b))
195 extern int scroll_margin
;
197 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
199 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
200 "Returns t if OBJECT is a window.")
204 return WINDOWP (object
) ? Qt
: Qnil
;
207 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
208 "Returns t if OBJECT is a window which is currently visible.")
212 return (WINDOWP (object
) && ! NILP (XWINDOW (object
)->buffer
) ? Qt
: Qnil
);
219 register struct window
*p
;
220 register struct Lisp_Vector
*vec
;
223 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct window
));
224 for (i
= 0; i
< VECSIZE (struct window
); i
++)
225 vec
->contents
[i
] = Qnil
;
226 vec
->size
= VECSIZE (struct window
);
227 p
= (struct window
*) vec
;
228 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
229 XSETFASTINT (p
->left
, 0);
230 XSETFASTINT (p
->top
, 0);
231 XSETFASTINT (p
->height
, 0);
232 XSETFASTINT (p
->width
, 0);
233 XSETFASTINT (p
->hscroll
, 0);
234 p
->orig_top
= p
->orig_height
= Qnil
;
235 p
->start
= Fmake_marker ();
236 p
->pointm
= Fmake_marker ();
237 XSETFASTINT (p
->use_time
, 0);
239 p
->display_table
= Qnil
;
241 p
->pseudo_window_p
= 0;
242 bzero (&p
->cursor
, sizeof (p
->cursor
));
243 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
244 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
245 p
->desired_matrix
= p
->current_matrix
= 0;
246 p
->phys_cursor_type
= -1;
247 p
->must_be_updated_p
= 0;
248 XSETFASTINT (p
->window_end_vpos
, 0);
249 XSETFASTINT (p
->window_end_pos
, 0);
250 p
->window_end_valid
= Qnil
;
253 XSETFASTINT (p
->last_point
, 0);
254 p
->frozen_window_start_p
= 0;
260 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
261 "Return the window that the cursor now appears in and commands apply to.")
264 return selected_window
;
267 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
268 "Return the window used now for minibuffers.\n\
269 If the optional argument FRAME is specified, return the minibuffer window\n\
270 used by that frame.")
275 frame
= selected_frame
;
276 CHECK_LIVE_FRAME (frame
, 0);
277 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
280 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
281 "Returns non-nil if WINDOW is a minibuffer window.")
285 struct window
*w
= decode_window (window
);
286 return (MINI_WINDOW_P (w
) ? Qt
: Qnil
);
289 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
290 Spos_visible_in_window_p
, 0, 2, 0,
291 "Return t if position POS is currently on the frame in WINDOW.\n\
292 Returns nil if that position is scrolled vertically out of view.\n\
293 POS defaults to point; WINDOW, to the selected window.")
295 Lisp_Object pos
, window
;
297 register struct window
*w
;
299 register struct buffer
*buf
;
301 Lisp_Object in_window
;
307 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
311 w
= decode_window (window
);
312 buf
= XBUFFER (w
->buffer
);
313 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
315 /* If position above window, it's not visible. */
316 if (posint
< CHARPOS (top
))
318 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
319 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
320 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
321 /* If frame is up to date, and POSINT is < window end pos, use
322 that info. This doesn't work for POSINT == end pos, because
323 the window end pos is actually the position _after_ the last
324 char in the window. */
326 else if (posint
> BUF_ZV (buf
))
328 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
329 /* If window start is out of range, do something reasonable. */
334 start_display (&it
, w
, top
);
335 move_it_to (&it
, posint
, 0, it
.last_visible_y
, -1,
336 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
337 in_window
= IT_CHARPOS (it
) == posint
? Qt
: Qnil
;
343 static struct window
*
344 decode_window (window
)
345 register Lisp_Object window
;
348 return XWINDOW (selected_window
);
350 CHECK_LIVE_WINDOW (window
, 0);
351 return XWINDOW (window
);
354 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
355 "Return the buffer that WINDOW is displaying.")
359 return decode_window (window
)->buffer
;
362 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
363 "Return the number of lines in WINDOW (including its mode line).")
367 return decode_window (window
)->height
;
370 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
371 "Return the number of display columns in WINDOW.\n\
372 This is the width that is usable columns available for text in WINDOW.\n\
373 If you want to find out how many columns WINDOW takes up,\n\
374 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
378 return make_number (window_internal_width (decode_window (window
)));
381 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
382 "Return the number of columns by which WINDOW is scrolled from left margin.")
386 return decode_window (window
)->hscroll
;
389 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
390 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
391 NCOL should be zero or positive.")
393 register Lisp_Object window
, ncol
;
395 register struct window
*w
;
397 CHECK_NUMBER (ncol
, 1);
398 if (XINT (ncol
) < 0) XSETFASTINT (ncol
, 0);
399 w
= decode_window (window
);
400 if (XINT (w
->hscroll
) != XINT (ncol
))
401 /* Prevent redisplay shortcuts */
402 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
407 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
408 Swindow_redisplay_end_trigger
, 0, 1, 0,
409 "Return WINDOW's redisplay end trigger value.\n\
410 See `set-window-redisplay-end-trigger' for more information.")
414 return decode_window (window
)->redisplay_end_trigger
;
417 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
418 Sset_window_redisplay_end_trigger
, 2, 2, 0,
419 "Set WINDOW's redisplay end trigger value to VALUE.\n\
420 VALUE should be a buffer position (typically a marker) or nil.\n\
421 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
422 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
423 with two arguments: WINDOW, and the end trigger value.\n\
424 Afterwards the end-trigger value is reset to nil.")
426 register Lisp_Object window
, value
;
428 register struct window
*w
;
430 w
= decode_window (window
);
431 w
->redisplay_end_trigger
= value
;
435 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
436 "Return a list of the edge coordinates of WINDOW.\n\
437 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
438 RIGHT is one more than the rightmost column used by WINDOW,\n\
439 and BOTTOM is one more than the bottommost row used by WINDOW\n\
444 register struct window
*w
= decode_window (window
);
446 return Fcons (w
->left
, Fcons (w
->top
,
447 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
448 Fcons (make_number (XFASTINT (w
->top
)
449 + XFASTINT (w
->height
)),
453 /* Test if the character at column *X, row *Y is within window W.
454 If it is not, return 0;
455 if it is in the window's text area,
456 set *x and *y to its location relative to the upper left corner
459 if it is on the window's modeline, return 2;
460 if it is on the border between the window and its right sibling,
462 if it is on the window's top line, return 4;
463 if it is in the bitmap area to the left/right of the window,
464 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
466 X and Y are frame relative pixel coordinates. */
469 coordinates_in_window (w
, x
, y
)
470 register struct window
*w
;
473 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
474 int left_x
, right_x
, top_y
, bottom_y
;
475 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
477 /* In what's below, we subtract 1 when computing right_x because we
478 want the rightmost pixel, which is given by left_pixel+width-1. */
479 if (w
->pseudo_window_p
)
482 right_x
= XFASTINT (w
->width
) * CANON_Y_UNIT (f
) - 1;
483 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
484 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
488 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
489 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
490 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
491 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
492 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
493 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
500 - (FRAME_LEFT_SCROLL_BAR_WIDTH (f
)
502 || *x
> right_x
+ flags_area_width
)
503 /* Completely outside anything interesting. */
505 else if (WINDOW_WANTS_MODELINE_P (w
)
506 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
507 /* On the mode line. */
509 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
510 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
511 /* On the top line. */
513 else if (*x
< left_x
|| *x
>= right_x
)
515 /* Other lines than the mode line don't include flags areas and
516 scroll bars on the left. */
518 /* Convert X and Y to window-relative pixel coordinates. */
521 return *x
< left_x
? 5 : 6;
523 else if (!w
->pseudo_window_p
524 && !WINDOW_RIGHTMOST_P (w
)
525 && *x
>= right_x
- CANON_X_UNIT (f
))
526 /* On the border on the right side of the window? Assume that
527 this area begins at RIGHT_X minus a canonical char width. */
531 /* Convert X and Y to window-relative pixel coordinates. */
538 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
539 Scoordinates_in_window_p
, 2, 2, 0,
540 "Return non-nil if COORDINATES are in WINDOW.\n\
541 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
542 measured in characters from the upper-left corner of the frame.\n\
543 (0 . 0) denotes the character in the upper left corner of the\n\
545 If COORDINATES are in the text portion of WINDOW,\n\
546 the coordinates relative to the window are returned.\n\
547 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
548 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
549 If they are in the bitmap-area to the left of the window,\n\
550 `left-bitmap-area' is returned, if they are in the area on the right of\n\
551 the window, `right-bitmap-area' is returned.\n\
552 If they are on the border between WINDOW and its right sibling,\n\
553 `vertical-line' is returned.")
554 (coordinates
, window
)
555 register Lisp_Object coordinates
, window
;
562 CHECK_LIVE_WINDOW (window
, 0);
563 w
= XWINDOW (window
);
564 f
= XFRAME (w
->frame
);
565 CHECK_CONS (coordinates
, 1);
566 lx
= Fcar (coordinates
);
567 ly
= Fcdr (coordinates
);
568 CHECK_NUMBER_OR_FLOAT (lx
, 1);
569 CHECK_NUMBER_OR_FLOAT (ly
, 1);
570 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
571 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
573 switch (coordinates_in_window (w
, &x
, &y
))
575 case 0: /* NOT in window at all. */
578 case 1: /* In text part of window. */
579 /* X and Y are now window relative pixel coordinates.
580 Convert them to canonical char units before returning
582 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
583 CANON_Y_FROM_PIXEL_Y (f
, y
));
585 case 2: /* In mode line of window. */
588 case 3: /* On right border of window. */
589 return Qvertical_line
;
595 return Qleft_bitmap_area
;
598 return Qright_bitmap_area
;
606 /* Callback for foreach_window, used in window_from_coordinates.
607 Check if window W contains coordinates specified by USER_DATA which
608 is actually a pointer to a struct check_window_data CW.
610 Check if window W contains coordinates *CW->x and *CW->y. If it
611 does, return W in *CW->window, as Lisp_Object, and return in
612 *CW->part the part of the window under coordinates *X/*Y. Return
613 zero from this function to stop iterating over windows. */
615 struct check_window_data
622 check_window_containing (w
, user_data
)
626 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
629 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
632 *cw
->part
= found
- 1;
633 XSETWINDOW (*cw
->window
, w
);
640 /* Find the window containing frame-relative pixel position X/Y and
641 return it as a Lisp_Object. If X, Y is on the window's modeline,
642 set *PART to 1; if it is on the separating line between the window
643 and its right sibling, set it to 2; otherwise set it to 0. If
644 there is no window under X, Y return nil and leave *PART
645 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
647 This function was previously implemented with a loop cycling over
648 windows with Fnext_window, and starting with the frame's selected
649 window. It turned out that this doesn't work with an
650 implementation of next_window using Vwindow_list, because
651 FRAME_SELECTED_WINDOW (F) is not always contained in the window
652 tree of F when this function is called asynchronously from
653 note_mouse_highlight. The original loop didn't terminate in this
657 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
664 struct check_window_data cw
;
667 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
668 foreach_window (f
, check_window_containing
, &cw
);
670 /* If not found above, see if it's in the tool bar window, if a tool
674 && WINDOWP (f
->tool_bar_window
)
675 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
676 && coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
))
679 window
= f
->tool_bar_window
;
685 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
686 "Return window containing coordinates X and Y on FRAME.\n\
687 If omitted, FRAME defaults to the currently selected frame.\n\
688 The top left corner of the frame is considered to be row 0,\n\
691 Lisp_Object x
, y
, frame
;
697 frame
= selected_frame
;
698 CHECK_LIVE_FRAME (frame
, 2);
701 /* Check that arguments are integers or floats. */
702 CHECK_NUMBER_OR_FLOAT (x
, 0);
703 CHECK_NUMBER_OR_FLOAT (y
, 1);
705 return window_from_coordinates (f
,
706 PIXEL_X_FROM_CANON_X (f
, x
),
707 PIXEL_Y_FROM_CANON_Y (f
, y
),
711 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
712 "Return current value of point in WINDOW.\n\
713 For a nonselected window, this is the value point would have\n\
714 if that window were selected.\n\
716 Note that, when WINDOW is the selected window and its buffer\n\
717 is also currently selected, the value returned is the same as (point).\n\
718 It would be more strictly correct to return the `top-level' value\n\
719 of point, outside of any save-excursion forms.\n\
720 But that is hard to define.")
724 register struct window
*w
= decode_window (window
);
726 if (w
== XWINDOW (selected_window
)
727 && current_buffer
== XBUFFER (w
->buffer
))
729 return Fmarker_position (w
->pointm
);
732 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
733 "Return position at which display currently starts in WINDOW.\n\
734 This is updated by redisplay or by calling `set-window-start'.")
738 return Fmarker_position (decode_window (window
)->start
);
741 /* This is text temporarily removed from the doc string below.
743 This function returns nil if the position is not currently known.\n\
744 That happens when redisplay is preempted and doesn't finish.\n\
745 If in that case you want to compute where the end of the window would\n\
746 have been if redisplay had finished, do this:\n\
748 (goto-char (window-start window))\n\
749 (vertical-motion (1- (window-height window)) window)\n\
752 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
753 "Return position at which display currently ends in WINDOW.\n\
754 This is updated by redisplay, when it runs to completion.\n\
755 Simply changing the buffer text or setting `window-start'\n\
756 does not update this value.\n\
757 If UP-TO-DATE is non-nil, compute the up-to-date position\n\
758 if it isn't already recorded.")
760 Lisp_Object window
, update
;
763 struct window
*w
= decode_window (window
);
767 CHECK_BUFFER (buf
, 0);
769 #if 0 /* This change broke some things. We should make it later. */
770 /* If we don't know the end position, return nil.
771 The user can compute it with vertical-motion if he wants to.
772 It would be nicer to do it automatically,
773 but that's so slow that it would probably bother people. */
774 if (NILP (w
->window_end_valid
))
779 && ! (! NILP (w
->window_end_valid
)
780 && XFASTINT (w
->last_modified
) >= MODIFF
))
782 int opoint
= PT
, opoint_byte
= PT_BYTE
;
784 /* In case W->start is out of the range, use something
785 reasonable. This situation occured when loading a file with
786 `-l' containing a call to `rmail' with subsequent other
787 commands. At the end, W->start happened to be BEG, while
788 rmail had already narrowed the buffer. This leads to an
789 abort in temp_set_pt_both. */
790 if (XMARKER (w
->start
)->charpos
< BEGV
)
791 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
792 else if (XMARKER (w
->start
)->charpos
> ZV
)
793 TEMP_SET_PT_BOTH (ZV
, ZV_BYTE
);
795 TEMP_SET_PT_BOTH (XMARKER (w
->start
)->charpos
,
796 XMARKER (w
->start
)->bytepos
);
798 Fvertical_motion (make_number (window_internal_height (w
)), Qnil
);
800 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
804 BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
809 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
810 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
812 Lisp_Object window
, pos
;
814 register struct window
*w
= decode_window (window
);
816 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
817 if (w
== XWINDOW (selected_window
)
818 && XBUFFER (w
->buffer
) == current_buffer
)
821 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
826 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
827 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
828 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
829 from overriding motion of point in order to display at this exact start.")
830 (window
, pos
, noforce
)
831 Lisp_Object window
, pos
, noforce
;
833 register struct window
*w
= decode_window (window
);
835 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
836 set_marker_restricted (w
->start
, pos
, w
->buffer
);
837 /* this is not right, but much easier than doing what is right. */
838 w
->start_at_line_beg
= Qnil
;
841 w
->update_mode_line
= Qt
;
842 XSETFASTINT (w
->last_modified
, 0);
843 XSETFASTINT (w
->last_overlay_modified
, 0);
844 if (!EQ (window
, selected_window
))
845 windows_or_buffers_changed
++;
850 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
852 "Return WINDOW's dedicated object, usually t or nil.\n\
853 See also `set-window-dedicated-p'.")
857 return decode_window (window
)->dedicated
;
860 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
861 Sset_window_dedicated_p
, 2, 2, 0,
862 "Control whether WINDOW is dedicated to the buffer it displays.\n\
863 If it is dedicated, Emacs will not automatically change\n\
864 which buffer appears in it.\n\
865 The second argument is the new value for the dedication flag;\n\
868 Lisp_Object window
, arg
;
870 register struct window
*w
= decode_window (window
);
880 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
882 "Return the display-table that WINDOW is using.")
886 return decode_window (window
)->display_table
;
889 /* Get the display table for use on window W. This is either W's
890 display table or W's buffer's display table. Ignore the specified
891 tables if they are not valid; if no valid table is specified,
894 struct Lisp_Char_Table
*
895 window_display_table (w
)
899 tem
= w
->display_table
;
900 if (DISP_TABLE_P (tem
))
901 return XCHAR_TABLE (tem
);
902 if (NILP (w
->buffer
))
905 tem
= XBUFFER (w
->buffer
)->display_table
;
906 if (DISP_TABLE_P (tem
))
907 return XCHAR_TABLE (tem
);
908 tem
= Vstandard_display_table
;
909 if (DISP_TABLE_P (tem
))
910 return XCHAR_TABLE (tem
);
914 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
915 "Set WINDOW's display-table to TABLE.")
917 register Lisp_Object window
, table
;
919 register struct window
*w
;
921 w
= decode_window (window
);
922 w
->display_table
= table
;
926 /* Record info on buffer window w is displaying
927 when it is about to cease to display that buffer. */
930 register struct window
*w
;
937 if (b
!= XMARKER (w
->pointm
)->buffer
)
941 if (w
== XWINDOW (selected_window
)
942 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
943 /* Do this except when the selected window's buffer
944 is being removed from some other window. */
946 /* last_window_start records the start position that this buffer
947 had in the last window to be disconnected from it.
948 Now that this statement is unconditional,
949 it is possible for the buffer to be displayed in the
950 selected window, while last_window_start reflects another
951 window which was recently showing the same buffer.
952 Some people might say that might be a good thing. Let's see. */
953 b
->last_window_start
= marker_position (w
->start
);
955 /* Point in the selected window's buffer
956 is actually stored in that buffer, and the window's pointm isn't used.
957 So don't clobber point in that buffer. */
958 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
959 /* This line helps to fix Horsley's testbug.el bug. */
960 && !(WINDOWP (b
->last_selected_window
)
961 && w
!= XWINDOW (b
->last_selected_window
)
962 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
963 temp_set_point_both (b
,
964 clip_to_bounds (BUF_BEGV (b
),
965 XMARKER (w
->pointm
)->charpos
,
967 clip_to_bounds (BUF_BEGV_BYTE (b
),
968 marker_byte_position (w
->pointm
),
971 if (WINDOWP (b
->last_selected_window
)
972 && w
== XWINDOW (b
->last_selected_window
))
973 b
->last_selected_window
= Qnil
;
976 /* Put replacement into the window structure in place of old. */
978 replace_window (old
, replacement
)
979 Lisp_Object old
, replacement
;
981 register Lisp_Object tem
;
982 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
984 /* If OLD is its frame's root_window, then replacement is the new
985 root_window for that frame. */
987 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
988 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
993 p
->height
= o
->height
;
994 p
->desired_matrix
= p
->current_matrix
= 0;
996 bzero (&p
->cursor
, sizeof (p
->cursor
));
997 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
998 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
999 p
->phys_cursor_type
= -1;
1000 p
->must_be_updated_p
= 0;
1001 p
->pseudo_window_p
= 0;
1002 XSETFASTINT (p
->window_end_vpos
, 0);
1003 XSETFASTINT (p
->window_end_pos
, 0);
1004 p
->window_end_valid
= Qnil
;
1005 p
->frozen_window_start_p
= 0;
1006 p
->orig_top
= p
->orig_height
= Qnil
;
1008 p
->next
= tem
= o
->next
;
1010 XWINDOW (tem
)->prev
= replacement
;
1012 p
->prev
= tem
= o
->prev
;
1014 XWINDOW (tem
)->next
= replacement
;
1016 p
->parent
= tem
= o
->parent
;
1019 if (EQ (XWINDOW (tem
)->vchild
, old
))
1020 XWINDOW (tem
)->vchild
= replacement
;
1021 if (EQ (XWINDOW (tem
)->hchild
, old
))
1022 XWINDOW (tem
)->hchild
= replacement
;
1025 /*** Here, if replacement is a vertical combination
1026 and so is its new parent, we should make replacement's
1027 children be children of that parent instead. ***/
1030 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1031 "Remove WINDOW from the display. Default is selected window.")
1033 register Lisp_Object window
;
1035 delete_window (window
);
1037 if (! NILP (Vwindow_configuration_change_hook
)
1038 && ! NILP (Vrun_hooks
))
1039 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1045 delete_window (window
)
1046 register Lisp_Object window
;
1048 register Lisp_Object tem
, parent
, sib
;
1049 register struct window
*p
;
1050 register struct window
*par
;
1053 /* Because this function is called by other C code on non-leaf
1054 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1055 so we can't decode_window here. */
1057 window
= selected_window
;
1059 CHECK_WINDOW (window
, 0);
1060 p
= XWINDOW (window
);
1062 /* It's okay to delete an already-deleted window. */
1063 if (NILP (p
->buffer
)
1065 && NILP (p
->vchild
))
1070 error ("Attempt to delete minibuffer or sole ordinary window");
1071 par
= XWINDOW (parent
);
1073 windows_or_buffers_changed
++;
1074 Vwindow_list
= Qnil
;
1075 frame
= XFRAME (WINDOW_FRAME (p
));
1076 FRAME_WINDOW_SIZES_CHANGED (frame
) = 1;
1078 /* Are we trying to delete any frame's selected window? */
1080 Lisp_Object frame
, pwindow
;
1082 /* See if the frame's selected window is either WINDOW
1083 or any subwindow of it, by finding all that window's parents
1084 and comparing each one with WINDOW. */
1085 frame
= WINDOW_FRAME (XWINDOW (window
));
1086 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
1088 while (!NILP (pwindow
))
1090 if (EQ (window
, pwindow
))
1092 pwindow
= XWINDOW (pwindow
)->parent
;
1095 if (EQ (window
, pwindow
))
1097 Lisp_Object alternative
;
1098 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1100 /* If we're about to delete the selected window on the
1101 selected frame, then we should use Fselect_window to select
1102 the new window. On the other hand, if we're about to
1103 delete the selected window on any other frame, we shouldn't do
1104 anything but set the frame's selected_window slot. */
1105 if (EQ (window
, selected_window
))
1106 Fselect_window (alternative
);
1108 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
1113 /* tem is null for dummy parent windows
1114 (which have inferiors but not any contents themselves) */
1118 unchain_marker (p
->pointm
);
1119 unchain_marker (p
->start
);
1122 /* Free window glyph matrices. It is sure that they are allocated
1123 again when ADJUST_GLYPHS is called. Block input so that expose
1124 events and other events that access glyph matrices are not
1125 processed while we are changing them. */
1127 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame
)));
1131 XWINDOW (tem
)->prev
= p
->prev
;
1135 XWINDOW (tem
)->next
= p
->next
;
1137 if (EQ (window
, par
->hchild
))
1138 par
->hchild
= p
->next
;
1139 if (EQ (window
, par
->vchild
))
1140 par
->vchild
= p
->next
;
1142 /* Find one of our siblings to give our space to. */
1146 /* If p gives its space to its next sibling, that sibling needs
1147 to have its top/left side pulled back to where p's is.
1148 set_window_{height,width} will re-position the sibling's
1151 XWINDOW (sib
)->top
= p
->top
;
1152 XWINDOW (sib
)->left
= p
->left
;
1155 /* Stretch that sibling. */
1156 if (!NILP (par
->vchild
))
1157 set_window_height (sib
,
1158 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1160 if (!NILP (par
->hchild
))
1161 set_window_width (sib
,
1162 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1165 /* If parent now has only one child,
1166 put the child into the parent's place. */
1170 if (NILP (XWINDOW (tem
)->next
))
1171 replace_window (parent
, tem
);
1173 /* Since we may be deleting combination windows, we must make sure that
1174 not only p but all its children have been marked as deleted. */
1175 if (! NILP (p
->hchild
))
1176 delete_all_subwindows (XWINDOW (p
->hchild
));
1177 else if (! NILP (p
->vchild
))
1178 delete_all_subwindows (XWINDOW (p
->vchild
));
1180 /* Mark this window as deleted. */
1181 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1183 /* Adjust glyph matrices. */
1184 adjust_glyphs (frame
);
1190 /***********************************************************************
1192 ***********************************************************************/
1194 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1195 pointer. This is a callback function for foreach_window, used in
1196 function window_list. */
1199 add_window_to_list (w
, user_data
)
1203 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1205 XSETWINDOW (window
, w
);
1206 *list
= Fcons (window
, *list
);
1211 /* Return a list of all windows, for use by next_window. If
1212 Vwindow_list is a list, return that list. Otherwise, build a new
1213 list, cache it in Vwindow_list, and return that. */
1218 if (!CONSP (Vwindow_list
))
1222 Vwindow_list
= Qnil
;
1223 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1225 Lisp_Object args
[2];
1227 /* We are visiting windows in canonical order, and add
1228 new windows at the front of args[1], which means we
1229 have to reverse this list at the end. */
1231 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1232 args
[0] = Vwindow_list
;
1233 args
[1] = Fnreverse (args
[1]);
1234 Vwindow_list
= Fnconc (2, args
);
1238 return Vwindow_list
;
1242 /* Value is non-zero if WINDOW satisfies the constraints given by
1243 OWINDOW, MINIBUF and ALL_FRAMES.
1245 MINIBUF t means WINDOW may be minibuffer windows.
1246 `lambda' means WINDOW may not be a minibuffer window.
1247 a window means a specific minibuffer window
1249 ALL_FRAMES t means search all frames,
1250 nil means search just current frame,
1251 `visible' means search just visible frames,
1252 0 means search visible and iconified frames,
1253 a window means search the frame that window belongs to,
1254 a frame means consider windows on that frame, only. */
1257 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1258 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1260 struct window
*w
= XWINDOW (window
);
1261 struct frame
*f
= XFRAME (w
->frame
);
1262 int candidate_p
= 1;
1264 if (!BUFFERP (w
->buffer
))
1266 else if (MINI_WINDOW_P (w
)
1267 && (EQ (minibuf
, Qlambda
)
1268 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1270 /* If MINIBUF is `lambda' don't consider any mini-windows.
1271 If it is a window, consider only that one. */
1274 else if (EQ (all_frames
, Qt
))
1276 else if (NILP (all_frames
))
1278 xassert (WINDOWP (owindow
));
1279 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1281 else if (EQ (all_frames
, Qvisible
))
1283 FRAME_SAMPLE_VISIBILITY (f
);
1284 candidate_p
= FRAME_VISIBLE_P (f
);
1286 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1288 FRAME_SAMPLE_VISIBILITY (f
);
1289 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1291 else if (WINDOWP (all_frames
))
1292 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1293 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1294 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1295 else if (FRAMEP (all_frames
))
1296 candidate_p
= EQ (all_frames
, w
->frame
);
1302 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1303 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1307 decode_next_window_args (window
, minibuf
, all_frames
)
1308 Lisp_Object
*window
, *minibuf
, *all_frames
;
1311 *window
= selected_window
;
1313 CHECK_LIVE_WINDOW (*window
, 0);
1315 /* MINIBUF nil may or may not include minibuffers. Decide if it
1317 if (NILP (*minibuf
))
1318 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1319 else if (!EQ (*minibuf
, Qt
))
1322 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1323 => count none of them, or a specific minibuffer window (the
1324 active one) to count. */
1326 /* ALL_FRAMES nil doesn't specify which frames to include. */
1327 if (NILP (*all_frames
))
1328 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1329 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1331 else if (EQ (*all_frames
, Qvisible
))
1333 else if (XFASTINT (*all_frames
) == 0)
1335 else if (FRAMEP (*all_frames
))
1337 else if (!EQ (*all_frames
, Qt
))
1340 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1341 search just current frame, `visible' meaning search just visible
1342 frames, 0 meaning search visible and iconified frames, or a
1343 window, meaning search the frame that window belongs to, or a
1344 frame, meaning consider windows on that frame, only. */
1348 /* Return the next or previous window of WINDOW in canonical ordering
1349 of windows. NEXT_P non-zero means return the next window. See the
1350 documentation string of next-window for the meaning of MINIBUF and
1354 next_window (window
, minibuf
, all_frames
, next_p
)
1355 Lisp_Object window
, minibuf
, all_frames
;
1358 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1360 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1361 return the first window on the frame. */
1362 if (FRAMEP (all_frames
)
1363 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1364 return Fframe_first_window (all_frames
);
1370 /* Find WINDOW in the list of all windows. */
1371 list
= Fmemq (window
, window_list ());
1373 /* Scan forward from WINDOW to the end of the window list. */
1375 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1376 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1379 /* Scan from the start of the window list up to WINDOW. */
1381 for (list
= Vwindow_list
;
1382 CONSP (list
) && !EQ (XCAR (list
), window
);
1384 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1388 window
= XCAR (list
);
1392 Lisp_Object candidate
, list
;
1394 /* Scan through the list of windows for candidates. If there are
1395 candidate windows in front of WINDOW, the last one of these
1396 is the one we want. If there are candidates following WINDOW
1397 in the list, again the last one of these is the one we want. */
1399 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1401 if (EQ (XCAR (list
), window
))
1403 if (WINDOWP (candidate
))
1406 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1408 candidate
= XCAR (list
);
1411 if (WINDOWP (candidate
))
1419 /* This comment supplies the doc string for `next-window',
1420 for make-docfile to see. We cannot put this in the real DEFUN
1421 due to limits in the Unix cpp.
1423 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1424 "Return next window after WINDOW in canonical ordering of windows.\n\
1425 If omitted, WINDOW defaults to the selected window.\n\
1427 Optional second arg MINIBUF t means count the minibuffer window even\n\
1428 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1429 it is active. MINIBUF neither t nor nil means not to count the\n\
1430 minibuffer even if it is active.\n\
1432 Several frames may share a single minibuffer; if the minibuffer\n\
1433 counts, all windows on all frames that share that minibuffer count\n\
1434 too. Therefore, `next-window' can be used to iterate through the\n\
1435 set of windows even when the minibuffer is on another frame. If the\n\
1436 minibuffer does not count, only windows from WINDOW's frame count.\n\
1438 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1439 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1440 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1441 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1442 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1443 Anything else means restrict to WINDOW's frame.\n\
1445 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1446 `next-window' to iterate through the entire cycle of acceptable\n\
1447 windows, eventually ending up back at the window you started with.\n\
1448 `previous-window' traverses the same cycle, in the reverse order.")
1449 (window, minibuf, all_frames) */
1451 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1453 (window
, minibuf
, all_frames
)
1454 Lisp_Object window
, minibuf
, all_frames
;
1456 return next_window (window
, minibuf
, all_frames
, 1);
1460 /* This comment supplies the doc string for `previous-window',
1461 for make-docfile to see. We cannot put this in the real DEFUN
1462 due to limits in the Unix cpp.
1464 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1465 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1466 If omitted, WINDOW defaults to the selected window.\n\
1468 Optional second arg MINIBUF t means count the minibuffer window even\n\
1469 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1470 it is active. MINIBUF neither t nor nil means not to count the\n\
1471 minibuffer even if it is active.\n\
1473 Several frames may share a single minibuffer; if the minibuffer\n\
1474 counts, all windows on all frames that share that minibuffer count\n\
1475 too. Therefore, `previous-window' can be used to iterate through\n\
1476 the set of windows even when the minibuffer is on another frame. If\n\
1477 the minibuffer does not count, only windows from WINDOW's frame count\n\
1479 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1480 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1481 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1482 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1483 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1484 Anything else means restrict to WINDOW's frame.\n\
1486 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1487 `previous-window' to iterate through the entire cycle of acceptable\n\
1488 windows, eventually ending up back at the window you started with.\n\
1489 `next-window' traverses the same cycle, in the reverse order.")
1490 (window, minibuf, all_frames) */
1493 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1495 (window
, minibuf
, all_frames
)
1496 Lisp_Object window
, minibuf
, all_frames
;
1498 return next_window (window
, minibuf
, all_frames
, 0);
1502 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1503 "Select the ARG'th different window on this frame.\n\
1504 All windows on current frame are arranged in a cyclic order.\n\
1505 This command selects the window ARG steps away in that order.\n\
1506 A negative ARG moves in the opposite order. If the optional second\n\
1507 argument ALL_FRAMES is non-nil, cycle through all frames.")
1509 Lisp_Object arg
, all_frames
;
1514 CHECK_NUMBER (arg
, 0);
1515 window
= selected_window
;
1517 for (i
= XINT (arg
); i
> 0; --i
)
1518 window
= Fnext_window (window
, Qnil
, all_frames
);
1520 window
= Fprevious_window (window
, Qnil
, all_frames
);
1522 Fselect_window (window
);
1527 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1528 "Return a list of windows in canonical ordering.\n\
1529 Arguments are like for `next-window'.")
1530 (window
, minibuf
, all_frames
)
1531 Lisp_Object window
, minibuf
, all_frames
;
1533 Lisp_Object tail
, list
;
1535 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1538 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1539 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1540 list
= Fcons (XCAR (tail
), list
);
1542 return Fnreverse (list
);
1547 /* Look at all windows, performing an operation specified by TYPE
1549 If FRAMES is Qt, look at all frames;
1550 Qnil, look at just the selected frame;
1551 Qvisible, look at visible frames;
1552 a frame, just look at windows on that frame.
1553 If MINI is non-zero, perform the operation on minibuffer windows too.
1559 GET_BUFFER_WINDOW
, /* Arg is buffer */
1560 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1561 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1562 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1564 UNSHOW_BUFFER
, /* Arg is buffer */
1569 window_loop (type
, obj
, mini
, frames
)
1570 enum window_loop type
;
1571 Lisp_Object obj
, frames
;
1574 Lisp_Object window
, windows
, best_window
, frame_arg
;
1576 struct gcpro gcpro1
;
1578 /* If we're only looping through windows on a particular frame,
1579 frame points to that frame. If we're looping through windows
1580 on all frames, frame is 0. */
1581 if (FRAMEP (frames
))
1582 f
= XFRAME (frames
);
1583 else if (NILP (frames
))
1584 f
= SELECTED_FRAME ();
1589 frame_arg
= Qlambda
;
1590 else if (XFASTINT (frames
) == 0)
1592 else if (EQ (frames
, Qvisible
))
1597 /* frame_arg is Qlambda to stick to one frame,
1598 Qvisible to consider all visible frames,
1601 /* Pick a window to start with. */
1605 window
= FRAME_SELECTED_WINDOW (f
);
1607 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1609 /* Figure out the last window we're going to mess with. Since
1610 Fnext_window, given the same options, is guaranteed to go in a
1611 ring, we can just use Fprevious_window to find the last one.
1613 We can't just wait until we hit the first window again, because
1614 it might be deleted. */
1616 windows
= Fwindow_list (window
, mini
? Qt
: Qnil
, frame_arg
);
1620 for (; CONSP (windows
); windows
= CDR (windows
))
1624 window
= XCAR (windows
);
1625 w
= XWINDOW (window
);
1627 /* Note that we do not pay attention here to whether the frame
1628 is visible, since Fwindow_list skips non-visible frames if
1629 that is desired, under the control of frame_arg. */
1630 if (!MINI_WINDOW_P (w
)
1631 /* For UNSHOW_BUFFER, we must always consider all windows. */
1632 || type
== UNSHOW_BUFFER
1633 || (mini
&& minibuf_level
> 0))
1636 case GET_BUFFER_WINDOW
:
1637 if (EQ (w
->buffer
, obj
)
1638 /* Don't find any minibuffer window
1639 except the one that is currently in use. */
1640 && (MINI_WINDOW_P (w
)
1641 ? EQ (window
, minibuf_window
)
1649 case GET_LRU_WINDOW
:
1650 /* t as arg means consider only full-width windows */
1651 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1653 /* Ignore dedicated windows and minibuffers. */
1654 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1656 if (NILP (best_window
)
1657 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1658 > XFASTINT (w
->use_time
)))
1659 best_window
= window
;
1662 case DELETE_OTHER_WINDOWS
:
1663 if (!EQ (window
, obj
))
1664 Fdelete_window (window
);
1667 case DELETE_BUFFER_WINDOWS
:
1668 if (EQ (w
->buffer
, obj
))
1670 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1672 /* If this window is dedicated, and in a frame of its own,
1674 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1675 && !NILP (w
->dedicated
)
1676 && other_visible_frames (f
))
1678 /* Skip the other windows on this frame.
1679 There might be one, the minibuffer! */
1680 while (CONSP (XCDR (windows
))
1681 && EQ (XWINDOW (XCAR (windows
))->frame
,
1682 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1683 windows
= XCDR (windows
);
1685 /* Now we can safely delete the frame. */
1686 Fdelete_frame (w
->frame
, Qnil
);
1688 else if (NILP (w
->parent
))
1690 /* If we're deleting the buffer displayed in the
1691 only window on the frame, find a new buffer to
1694 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1696 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1697 Fset_window_buffer (window
, buffer
);
1698 if (EQ (window
, selected_window
))
1699 Fset_buffer (w
->buffer
);
1702 Fdelete_window (window
);
1706 case GET_LARGEST_WINDOW
:
1710 /* Ignore dedicated windows and minibuffers. */
1711 if (MINI_WINDOW_P (w
)
1712 || !NILP (w
->dedicated
)
1713 || NILP (best_window
))
1716 b
= XWINDOW (best_window
);
1717 if (NILP (best_window
)
1718 || (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1719 > (XFASTINT (b
->height
) * XFASTINT (b
->width
))))
1720 best_window
= window
;
1725 if (EQ (w
->buffer
, obj
))
1728 struct frame
*f
= XFRAME (w
->frame
);
1730 /* Find another buffer to show in this window. */
1731 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1733 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1735 /* If this window is dedicated, and in a frame of its own,
1737 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1738 && !NILP (w
->dedicated
)
1739 && other_visible_frames (f
))
1741 /* Skip the other windows on this frame.
1742 There might be one, the minibuffer! */
1743 while (CONSP (XCDR (windows
))
1744 && EQ (XWINDOW (XCAR (windows
))->frame
,
1745 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1746 windows
= XCDR (windows
);
1748 /* Now we can safely delete the frame. */
1749 Fdelete_frame (w
->frame
, Qnil
);
1753 /* Otherwise show a different buffer in the window. */
1754 w
->dedicated
= Qnil
;
1755 Fset_window_buffer (window
, buffer
);
1756 if (EQ (window
, selected_window
))
1757 Fset_buffer (w
->buffer
);
1762 /* Check for a window that has a killed buffer. */
1763 case CHECK_ALL_WINDOWS
:
1764 if (! NILP (w
->buffer
)
1765 && NILP (XBUFFER (w
->buffer
)->name
))
1775 /* Used for debugging. Abort if any window has a dead buffer. */
1778 check_all_windows ()
1780 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1783 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1784 "Return the window least recently selected or used for display.\n\
1785 If optional argument FRAME is `visible', search all visible frames.\n\
1786 If FRAME is 0, search all visible and iconified frames.\n\
1787 If FRAME is t, search all frames.\n\
1788 If FRAME is nil, search only the selected frame.\n\
1789 If FRAME is a frame, search only that frame.")
1793 register Lisp_Object w
;
1794 /* First try for a window that is full-width */
1795 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1796 if (!NILP (w
) && !EQ (w
, selected_window
))
1798 /* If none of them, try the rest */
1799 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1802 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1803 "Return the largest window in area.\n\
1804 If optional argument FRAME is `visible', search all visible frames.\n\
1805 If FRAME is 0, search all visible and iconified frames.\n\
1806 If FRAME is t, search all frames.\n\
1807 If FRAME is nil, search only the selected frame.\n\
1808 If FRAME is a frame, search only that frame.")
1812 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1816 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1817 "Return a window currently displaying BUFFER, or nil if none.\n\
1818 If optional argument FRAME is `visible', search all visible frames.\n\
1819 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1820 If FRAME is t, search all frames.\n\
1821 If FRAME is nil, search only the selected frame.\n\
1822 If FRAME is a frame, search only that frame.")
1824 Lisp_Object buffer
, frame
;
1826 buffer
= Fget_buffer (buffer
);
1827 if (BUFFERP (buffer
))
1828 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1833 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1835 "Make WINDOW (or the selected window) fill its frame.\n\
1836 Only the frame WINDOW is on is affected.\n\
1837 This function tries to reduce display jumps\n\
1838 by keeping the text previously visible in WINDOW\n\
1839 in the same place on the frame. Doing this depends on\n\
1840 the value of (window-start WINDOW), so if calling this function\n\
1841 in a program gives strange scrolling, make sure the window-start\n\
1842 value is reasonable when this function is called.")
1851 window
= selected_window
;
1853 CHECK_LIVE_WINDOW (window
, 0);
1855 w
= XWINDOW (window
);
1857 startpos
= marker_position (w
->start
);
1858 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
1860 if (MINI_WINDOW_P (w
) && top
> 0)
1861 error ("Can't expand minibuffer to full frame");
1863 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1865 /* Try to minimize scrolling, by setting the window start to the point
1866 will cause the text at the old window start to be at the same place
1867 on the frame. But don't try to do this if the window start is
1868 outside the visible portion (as might happen when the display is
1869 not current, due to typeahead). */
1870 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
1871 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
1873 struct position pos
;
1874 struct buffer
*obuf
= current_buffer
;
1876 Fset_buffer (w
->buffer
);
1877 /* This computation used to temporarily move point, but that can
1878 have unwanted side effects due to text properties. */
1879 pos
= *vmotion (startpos
, -top
, w
);
1881 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
1882 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
1883 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
1885 /* We need to do this, so that the window-scroll-functions
1887 w
->optional_new_start
= Qt
;
1889 set_buffer_internal (obuf
);
1895 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1896 1, 2, "bDelete windows on (buffer): ",
1897 "Delete all windows showing BUFFER.\n\
1898 Optional second argument FRAME controls which frames are affected.\n\
1899 If optional argument FRAME is `visible', search all visible frames.\n\
1900 If FRAME is 0, search all visible and iconified frames.\n\
1901 If FRAME is nil, search all frames.\n\
1902 If FRAME is t, search only the selected frame.\n\
1903 If FRAME is a frame, search only that frame.")
1905 Lisp_Object buffer
, frame
;
1907 /* FRAME uses t and nil to mean the opposite of what window_loop
1911 else if (EQ (frame
, Qt
))
1916 buffer
= Fget_buffer (buffer
);
1917 CHECK_BUFFER (buffer
, 0);
1918 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1924 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1925 Sreplace_buffer_in_windows
,
1926 1, 1, "bReplace buffer in windows: ",
1927 "Replace BUFFER with some other buffer in all windows showing it.")
1933 buffer
= Fget_buffer (buffer
);
1934 CHECK_BUFFER (buffer
, 0);
1935 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1940 /* Replace BUFFER with some other buffer in all windows
1941 of all frames, even those on other keyboards. */
1944 replace_buffer_in_all_windows (buffer
)
1948 Lisp_Object tail
, frame
;
1950 /* A single call to window_loop won't do the job
1951 because it only considers frames on the current keyboard.
1952 So loop manually over frames, and handle each one. */
1953 FOR_EACH_FRAME (tail
, frame
)
1954 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
1956 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
1960 /* Set the height of WINDOW and all its inferiors. */
1962 /* The smallest acceptable dimensions for a window. Anything smaller
1963 might crash Emacs. */
1965 #define MIN_SAFE_WINDOW_WIDTH (2)
1966 #define MIN_SAFE_WINDOW_HEIGHT (2)
1968 /* Make sure that window_min_height and window_min_width are
1969 not too small; if they are, set them to safe minima. */
1972 check_min_window_sizes ()
1974 /* Smaller values might permit a crash. */
1975 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1976 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1977 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1978 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1981 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1982 minimum allowable size. */
1985 check_frame_size (frame
, rows
, cols
)
1989 /* For height, we have to see:
1990 whether the frame has a minibuffer,
1991 whether it wants a mode line, and
1992 whether it has a menu bar. */
1994 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1995 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1996 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1998 if (FRAME_TOP_MARGIN (frame
) > 0)
1999 min_height
+= FRAME_TOP_MARGIN (frame
);
2001 if (*rows
< min_height
)
2003 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2004 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2008 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2009 check if W's width can be changed, otherwise check W's height.
2010 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2011 siblings, too. If none of the siblings is resizable, WINDOW isn't
2015 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2017 int width_p
, check_siblings_p
;
2022 if (!NILP (w
->hchild
))
2024 c
= XWINDOW (w
->hchild
);
2028 /* A horiz. combination is fixed-width if all of if its
2030 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2031 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2032 fixed_p
= c
== NULL
;
2036 /* A horiz. combination is fixed-height if one of if its
2038 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2039 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2040 fixed_p
= c
!= NULL
;
2043 else if (!NILP (w
->vchild
))
2045 c
= XWINDOW (w
->vchild
);
2049 /* A vert. combination is fixed-width if one of if its
2051 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2052 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2053 fixed_p
= c
!= NULL
;
2057 /* A vert. combination is fixed-height if all of if its
2059 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2060 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2061 fixed_p
= c
== NULL
;
2064 else if (BUFFERP (w
->buffer
))
2066 if (w
->height_fixed_p
&& !width_p
)
2070 struct buffer
*old
= current_buffer
;
2073 current_buffer
= XBUFFER (w
->buffer
);
2074 val
= find_symbol_value (Qwindow_size_fixed
);
2075 current_buffer
= old
;
2078 if (!EQ (val
, Qunbound
))
2080 fixed_p
= !NILP (val
);
2083 && ((EQ (val
, Qheight
) && width_p
)
2084 || (EQ (val
, Qwidth
) && !width_p
)))
2089 /* Can't tell if this one is resizable without looking at
2090 siblings. If all siblings are fixed-size this one is too. */
2091 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2095 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2096 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2100 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2101 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2115 /* Return the minimum size of window W, not taking fixed-width windows
2116 into account. WIDTH_P non-zero means return the minimum width,
2117 otherwise return the minimum height. If W is a combination window,
2118 compute the minimum size from the minimum sizes of W's children. */
2121 window_min_size_1 (w
, width_p
)
2128 if (!NILP (w
->hchild
))
2130 c
= XWINDOW (w
->hchild
);
2135 /* The min width of a horizontal combination is
2136 the sum of the min widths of its children. */
2139 size
+= window_min_size_1 (c
, width_p
);
2140 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2145 /* The min height a horizontal combination equals
2146 the maximum of all min height of its children. */
2149 int min_size
= window_min_size_1 (c
, width_p
);
2150 size
= max (min_size
, size
);
2151 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2155 else if (!NILP (w
->vchild
))
2157 c
= XWINDOW (w
->vchild
);
2162 /* The min width of a vertical combination is
2163 the maximum of the min widths of its children. */
2166 int min_size
= window_min_size_1 (c
, width_p
);
2167 size
= max (min_size
, size
);
2168 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2173 /* The min height of a vertical combination equals
2174 the sum of the min height of its children. */
2177 size
+= window_min_size_1 (c
, width_p
);
2178 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2185 size
= window_min_width
;
2188 if (MINI_WINDOW_P (w
)
2189 || (!WINDOW_WANTS_MODELINE_P (w
)
2190 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2193 size
= window_min_height
;
2201 /* Return the minimum size of window W, taking fixed-size windows into
2202 account. WIDTH_P non-zero means return the minimum width,
2203 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2204 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2205 unless FIXED is null. */
2208 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2210 int width_p
, ignore_fixed_p
, *fixed
;
2217 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2223 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2225 size
= window_min_size_1 (w
, width_p
);
2231 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2232 WINDOW's width. Resize WINDOW's children, if any, so that they
2233 keep their proportionate size relative to WINDOW. Propagate
2234 WINDOW's top or left edge position to children. Delete windows
2235 that become too small unless NODELETE_P is non-zero. */
2238 size_window (window
, size
, width_p
, nodelete_p
)
2240 int size
, width_p
, nodelete_p
;
2242 struct window
*w
= XWINDOW (window
);
2244 Lisp_Object child
, *forward
, *sideward
;
2245 int old_size
, min_size
;
2247 check_min_window_sizes ();
2249 /* If the window has been "too small" at one point,
2250 don't delete it for being "too small" in the future.
2251 Preserve it as long as that is at all possible. */
2254 old_size
= XFASTINT (w
->width
);
2255 min_size
= window_min_width
;
2259 old_size
= XFASTINT (w
->height
);
2260 min_size
= window_min_height
;
2263 if (old_size
< window_min_width
)
2264 w
->too_small_ok
= Qt
;
2266 /* Maybe delete WINDOW if it's too small. */
2267 if (!nodelete_p
&& !NILP (w
->parent
))
2271 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2272 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2274 min_size
= width_p
? window_min_width
: window_min_height
;
2276 if (size
< min_size
)
2278 delete_window (window
);
2283 /* Set redisplay hints. */
2284 XSETFASTINT (w
->last_modified
, 0);
2285 XSETFASTINT (w
->last_overlay_modified
, 0);
2286 windows_or_buffers_changed
++;
2287 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
2291 sideward
= &w
->vchild
;
2292 forward
= &w
->hchild
;
2293 XSETFASTINT (w
->width
, size
);
2297 sideward
= &w
->hchild
;
2298 forward
= &w
->vchild
;
2299 XSETFASTINT (w
->height
, size
);
2302 if (!NILP (*sideward
))
2304 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2306 c
= XWINDOW (child
);
2311 size_window (child
, size
, width_p
, nodelete_p
);
2314 else if (!NILP (*forward
))
2316 int fixed_size
, each
, extra
, n
;
2317 int resize_fixed_p
, nfixed
;
2318 int last_pos
, first_pos
, nchildren
;
2320 /* Determine the fixed-size portion of the this window, and the
2321 number of child windows. */
2322 fixed_size
= nchildren
= nfixed
= 0;
2323 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2325 c
= XWINDOW (child
);
2326 if (window_fixed_size_p (c
, width_p
, 0))
2328 fixed_size
+= (width_p
2329 ? XFASTINT (c
->width
) : XFASTINT (c
->height
));
2334 /* If the new size is smaller than fixed_size, or if there
2335 aren't any resizable windows, allow resizing fixed-size
2337 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2339 /* Compute how many lines/columns to add to each child. The
2340 value of extra takes care of rounding errors. */
2341 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2342 each
= (size
- old_size
) / n
;
2343 extra
= (size
- old_size
) - n
* each
;
2345 /* Compute new children heights and edge positions. */
2346 first_pos
= width_p
? XFASTINT (w
->left
) : XFASTINT (w
->top
);
2347 last_pos
= first_pos
;
2348 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2350 int new_size
, old_size
;
2352 c
= XWINDOW (child
);
2353 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2354 new_size
= old_size
;
2356 /* The top or left edge position of this child equals the
2357 bottom or right edge of its predecessor. */
2359 c
->left
= make_number (last_pos
);
2361 c
->top
= make_number (last_pos
);
2363 /* If this child can be resized, do it. */
2364 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2366 new_size
= old_size
+ each
+ extra
;
2370 /* Set new height. Note that size_window also propagates
2371 edge positions to children, so it's not a no-op if we
2372 didn't change the child's size. */
2373 size_window (child
, new_size
, width_p
, 1);
2375 /* Remember the bottom/right edge position of this child; it
2376 will be used to set the top/left edge of the next child. */
2377 last_pos
+= new_size
;
2380 /* We should have covered the parent exactly with child windows. */
2381 xassert (size
== last_pos
- first_pos
);
2383 /* Now delete any children that became too small. */
2385 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2388 c
= XWINDOW (child
);
2389 child_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2390 size_window (child
, child_size
, width_p
, 0);
2395 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2396 WINDOW's children. NODELETE non-zero means don't delete windows
2397 that become too small in the process. (The caller should check
2398 later and do so if appropriate.) */
2401 set_window_height (window
, height
, nodelete
)
2406 size_window (window
, height
, 0, nodelete
);
2410 /* Set WINDOW's width to WIDTH, and recursively change the width of
2411 WINDOW's children. NODELETE non-zero means don't delete windows
2412 that become too small in the process. (The caller should check
2413 later and do so if appropriate.) */
2416 set_window_width (window
, width
, nodelete
)
2421 size_window (window
, width
, 1, nodelete
);
2425 int window_select_count
;
2428 Fset_window_buffer_unwind (obuf
)
2436 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2437 means it's allowed to run hooks. See make_frame for a case where
2438 it's not allowed. */
2441 set_window_buffer (window
, buffer
, run_hooks_p
)
2442 Lisp_Object window
, buffer
;
2445 struct window
*w
= XWINDOW (window
);
2446 struct buffer
*b
= XBUFFER (buffer
);
2447 int count
= specpdl_ptr
- specpdl
;
2451 if (EQ (window
, selected_window
))
2452 b
->last_selected_window
= window
;
2454 /* Update time stamps of buffer display. */
2455 if (INTEGERP (b
->display_count
))
2456 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2457 b
->display_time
= Fcurrent_time ();
2459 XSETFASTINT (w
->window_end_pos
, 0);
2460 XSETFASTINT (w
->window_end_vpos
, 0);
2461 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2462 w
->window_end_valid
= Qnil
;
2463 XSETFASTINT (w
->hscroll
, 0);
2464 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2465 set_marker_restricted (w
->start
,
2466 make_number (b
->last_window_start
),
2468 w
->start_at_line_beg
= Qnil
;
2469 w
->force_start
= Qnil
;
2470 XSETFASTINT (w
->last_modified
, 0);
2471 XSETFASTINT (w
->last_overlay_modified
, 0);
2472 windows_or_buffers_changed
++;
2474 /* We must select BUFFER for running the window-scroll-functions.
2475 If WINDOW is selected, switch permanently.
2476 Otherwise, switch but go back to the ambient buffer afterward. */
2477 if (EQ (window
, selected_window
))
2478 Fset_buffer (buffer
);
2479 /* We can't check ! NILP (Vwindow_scroll_functions) here
2480 because that might itself be a local variable. */
2481 else if (window_initialized
)
2483 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2484 Fset_buffer (buffer
);
2487 /* Set left and right marginal area width from buffer. */
2488 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2492 if (! NILP (Vwindow_scroll_functions
))
2493 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2494 Fmarker_position (w
->start
));
2496 if (! NILP (Vwindow_configuration_change_hook
)
2497 && ! NILP (Vrun_hooks
))
2498 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2501 unbind_to (count
, Qnil
);
2505 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2506 "Make WINDOW display BUFFER as its contents.\n\
2507 BUFFER can be a buffer or buffer name.")
2509 register Lisp_Object window
, buffer
;
2511 register Lisp_Object tem
;
2512 register struct window
*w
= decode_window (window
);
2514 XSETWINDOW (window
, w
);
2515 buffer
= Fget_buffer (buffer
);
2516 CHECK_BUFFER (buffer
, 1);
2518 if (NILP (XBUFFER (buffer
)->name
))
2519 error ("Attempt to display deleted buffer");
2523 error ("Window is deleted");
2524 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2525 is first being set up. */
2527 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2528 error ("Window is dedicated to `%s'",
2529 XSTRING (XBUFFER (tem
)->name
)->data
);
2534 set_window_buffer (window
, buffer
, 1);
2538 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2539 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2540 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2541 Note that the main editor command loop\n\
2542 selects the buffer of the selected window before each command.")
2544 register Lisp_Object window
;
2546 return select_window_1 (window
, 1);
2549 /* Note that selected_window can be nil
2550 when this is called from Fset_window_configuration. */
2553 select_window_1 (window
, recordflag
)
2554 register Lisp_Object window
;
2557 register struct window
*w
;
2558 register struct window
*ow
;
2561 CHECK_LIVE_WINDOW (window
, 0);
2563 w
= XWINDOW (window
);
2565 if (NILP (w
->buffer
))
2566 error ("Trying to select deleted window or non-leaf window");
2568 XSETFASTINT (w
->use_time
, ++window_select_count
);
2569 if (EQ (window
, selected_window
))
2572 if (!NILP (selected_window
))
2574 ow
= XWINDOW (selected_window
);
2575 if (! NILP (ow
->buffer
))
2576 set_marker_both (ow
->pointm
, ow
->buffer
,
2577 BUF_PT (XBUFFER (ow
->buffer
)),
2578 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2581 selected_window
= window
;
2582 sf
= SELECTED_FRAME ();
2583 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2585 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2586 /* Use this rather than Fhandle_switch_frame
2587 so that FRAME_FOCUS_FRAME is moved appropriately as we
2588 move around in the state where a minibuffer in a separate
2590 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2593 sf
->selected_window
= window
;
2596 record_buffer (w
->buffer
);
2597 Fset_buffer (w
->buffer
);
2599 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2601 /* Go to the point recorded in the window.
2602 This is important when the buffer is in more
2603 than one window. It also matters when
2604 redisplay_window has altered point after scrolling,
2605 because it makes the change only in the window. */
2607 register int new_point
= marker_position (w
->pointm
);
2608 if (new_point
< BEGV
)
2610 else if (new_point
> ZV
)
2616 windows_or_buffers_changed
++;
2620 /* Deiconify the frame containing the window WINDOW,
2621 unless it is the selected frame;
2624 The reason for the exception for the selected frame
2625 is that it seems better not to change the selected frames visibility
2626 merely because of displaying a different buffer in it.
2627 The deiconification is useful when a buffer gets shown in
2628 another frame that you were not using lately. */
2631 display_buffer_1 (window
)
2634 Lisp_Object frame
= XWINDOW (window
)->frame
;
2635 FRAME_PTR f
= XFRAME (frame
);
2637 FRAME_SAMPLE_VISIBILITY (f
);
2639 if (!EQ (frame
, selected_frame
))
2641 if (FRAME_ICONIFIED_P (f
))
2642 Fmake_frame_visible (frame
);
2643 else if (FRAME_VISIBLE_P (f
))
2644 Fraise_frame (frame
);
2650 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2651 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2652 The value is actually t if the frame should be called with default frame\n\
2653 parameters, and a list of frame parameters if they were specified.\n\
2654 See `special-display-buffer-names', and `special-display-regexps'.")
2656 Lisp_Object buffer_name
;
2660 CHECK_STRING (buffer_name
, 1);
2662 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2666 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2670 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2672 Lisp_Object car
= XCAR (tem
);
2674 && fast_string_match (car
, buffer_name
) >= 0)
2676 else if (CONSP (car
)
2677 && STRINGP (XCAR (car
))
2678 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2684 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2685 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2686 See `same-window-buffer-names' and `same-window-regexps'.")
2688 Lisp_Object buffer_name
;
2692 CHECK_STRING (buffer_name
, 1);
2694 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2698 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2702 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2704 Lisp_Object car
= XCAR (tem
);
2706 && fast_string_match (car
, buffer_name
) >= 0)
2708 else if (CONSP (car
)
2709 && STRINGP (XCAR (car
))
2710 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2716 /* Use B so the default is (other-buffer). */
2717 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2718 "BDisplay buffer: \nP",
2719 "Make BUFFER appear in some window but don't select it.\n\
2720 BUFFER can be a buffer or a buffer name.\n\
2721 If BUFFER is shown already in some window, just use that one,\n\
2722 unless the window is the selected window and the optional second\n\
2723 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2724 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2725 Returns the window displaying BUFFER.\n\
2727 The variables `special-display-buffer-names', `special-display-regexps',\n\
2728 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2729 buffer names are handled.\n\
2731 If optional argument FRAME is `visible', search all visible frames.\n\
2732 If FRAME is 0, search all visible and iconified frames.\n\
2733 If FRAME is t, search all frames.\n\
2734 If FRAME is a frame, search only that frame.\n\
2735 If FRAME is nil, search only the selected frame\n\
2736 (actually the last nonminibuffer frame),\n\
2737 unless `pop-up-frames' is non-nil,\n\
2738 which means search visible and iconified frames.")
2739 (buffer
, not_this_window
, frame
)
2740 register Lisp_Object buffer
, not_this_window
, frame
;
2742 register Lisp_Object window
, tem
, swp
;
2746 buffer
= Fget_buffer (buffer
);
2747 CHECK_BUFFER (buffer
, 0);
2749 if (!NILP (Vdisplay_buffer_function
))
2750 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2752 if (NILP (not_this_window
)
2753 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2754 return display_buffer_1 (selected_window
);
2756 /* See if the user has specified this buffer should appear
2757 in the selected window. */
2758 if (NILP (not_this_window
))
2760 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2761 if (!NILP (swp
) && !no_switch_window (selected_window
))
2763 Fswitch_to_buffer (buffer
, Qnil
);
2764 return display_buffer_1 (selected_window
);
2768 /* If pop_up_frames,
2769 look for a window showing BUFFER on any visible or iconified frame.
2770 Otherwise search only the current frame. */
2773 else if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2774 XSETFASTINT (tem
, 0);
2776 XSETFRAME (tem
, last_nonminibuf_frame
);
2777 window
= Fget_buffer_window (buffer
, tem
);
2779 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2781 return display_buffer_1 (window
);
2784 /* Certain buffer names get special handling. */
2785 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2787 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2789 return call1 (Vspecial_display_function
, buffer
);
2791 return call2 (Vspecial_display_function
, buffer
, tem
);
2794 /* If there are no frames open that have more than a minibuffer,
2795 we need to create a new frame. */
2796 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2798 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2799 Fset_window_buffer (window
, buffer
);
2800 return display_buffer_1 (window
);
2803 f
= SELECTED_FRAME ();
2805 || FRAME_MINIBUF_ONLY_P (f
)
2806 /* If the current frame is a special display frame,
2807 don't try to reuse its windows. */
2808 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2813 if (FRAME_MINIBUF_ONLY_P (f
))
2814 XSETFRAME (frames
, last_nonminibuf_frame
);
2815 /* Don't try to create a window if would get an error */
2816 if (split_height_threshold
< window_min_height
<< 1)
2817 split_height_threshold
= window_min_height
<< 1;
2819 /* Note that both Fget_largest_window and Fget_lru_window
2820 ignore minibuffers and dedicated windows.
2821 This means they can return nil. */
2823 /* If the frame we would try to split cannot be split,
2824 try other frames. */
2825 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2827 /* Try visible frames first. */
2828 window
= Fget_largest_window (Qvisible
);
2829 /* If that didn't work, try iconified frames. */
2831 window
= Fget_largest_window (make_number (0));
2833 window
= Fget_largest_window (Qt
);
2836 window
= Fget_largest_window (frames
);
2838 /* If we got a tall enough full-width window that can be split,
2841 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2842 && window_height (window
) >= split_height_threshold
2843 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2844 window
= Fsplit_window (window
, Qnil
, Qnil
);
2847 Lisp_Object upper
, lower
, other
;
2849 window
= Fget_lru_window (frames
);
2850 /* If the LRU window is selected, and big enough,
2851 and can be split, split it. */
2853 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2854 && (EQ (window
, selected_window
)
2855 || EQ (XWINDOW (window
)->parent
, Qnil
))
2856 && window_height (window
) >= window_min_height
<< 1)
2857 window
= Fsplit_window (window
, Qnil
, Qnil
);
2858 /* If Fget_lru_window returned nil, try other approaches. */
2860 /* Try visible frames first. */
2862 window
= Fget_buffer_window (buffer
, Qvisible
);
2864 window
= Fget_largest_window (Qvisible
);
2865 /* If that didn't work, try iconified frames. */
2867 window
= Fget_buffer_window (buffer
, make_number (0));
2869 window
= Fget_largest_window (make_number (0));
2870 /* Try invisible frames. */
2872 window
= Fget_buffer_window (buffer
, Qt
);
2874 window
= Fget_largest_window (Qt
);
2875 /* As a last resort, make a new frame. */
2877 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2878 /* If window appears above or below another,
2879 even out their heights. */
2880 other
= upper
= lower
= Qnil
;
2881 if (!NILP (XWINDOW (window
)->prev
))
2882 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
2883 if (!NILP (XWINDOW (window
)->next
))
2884 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
2886 /* Check that OTHER and WINDOW are vertically arrayed. */
2887 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
2888 && (XFASTINT (XWINDOW (other
)->height
)
2889 > XFASTINT (XWINDOW (window
)->height
)))
2891 int total
= (XFASTINT (XWINDOW (other
)->height
)
2892 + XFASTINT (XWINDOW (window
)->height
));
2893 enlarge_window (upper
,
2894 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
2900 window
= Fget_lru_window (Qnil
);
2902 Fset_window_buffer (window
, buffer
);
2903 return display_buffer_1 (window
);
2907 temp_output_buffer_show (buf
)
2908 register Lisp_Object buf
;
2910 register struct buffer
*old
= current_buffer
;
2911 register Lisp_Object window
;
2912 register struct window
*w
;
2914 XBUFFER (buf
)->directory
= current_buffer
->directory
;
2917 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
2921 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
2922 set_buffer_internal (old
);
2924 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
2925 call1 (Vtemp_buffer_show_function
, buf
);
2928 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
2930 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
2931 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
2932 Vminibuf_scroll_window
= window
;
2933 w
= XWINDOW (window
);
2934 XSETFASTINT (w
->hscroll
, 0);
2935 set_marker_restricted_both (w
->start
, buf
, 1, 1);
2936 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
2938 /* Run temp-buffer-show-hook, with the chosen window selected
2939 and it sbuffer current. */
2940 if (!NILP (Vrun_hooks
))
2943 tem
= Fboundp (Qtemp_buffer_show_hook
);
2946 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
2949 int count
= specpdl_ptr
- specpdl
;
2950 Lisp_Object prev_window
;
2951 prev_window
= selected_window
;
2953 /* Select the window that was chosen, for running the hook. */
2954 record_unwind_protect (Fselect_window
, prev_window
);
2955 select_window_1 (window
, 0);
2956 Fset_buffer (w
->buffer
);
2957 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
2958 select_window_1 (prev_window
, 0);
2959 unbind_to (count
, Qnil
);
2967 make_dummy_parent (window
)
2971 register struct window
*o
, *p
;
2972 register struct Lisp_Vector
*vec
;
2975 o
= XWINDOW (window
);
2976 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
2977 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
2978 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
2979 vec
->size
= VECSIZE (struct window
);
2980 p
= (struct window
*)vec
;
2981 XSETWINDOW (new, p
);
2983 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
2985 /* Put new into window structure in place of window */
2986 replace_window (window
, new);
2999 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3000 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3001 WINDOW defaults to selected one and SIZE to half its size.\n\
3002 If optional third arg HORFLAG is non-nil, split side by side\n\
3003 and put SIZE columns in the first of the pair. In that case,\n\
3004 SIZE includes that window's scroll bar, or the divider column to its right.")
3005 (window
, size
, horflag
)
3006 Lisp_Object window
, size
, horflag
;
3008 register Lisp_Object
new;
3009 register struct window
*o
, *p
;
3011 register int size_int
;
3014 window
= selected_window
;
3016 CHECK_LIVE_WINDOW (window
, 0);
3018 o
= XWINDOW (window
);
3019 fo
= XFRAME (WINDOW_FRAME (o
));
3023 if (!NILP (horflag
))
3024 /* Calculate the size of the left-hand window, by dividing
3025 the usable space in columns by two.
3026 We round up, since the left-hand window may include
3027 a dividing line, while the right-hand may not. */
3028 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3030 size_int
= XFASTINT (o
->height
) >> 1;
3034 CHECK_NUMBER (size
, 1);
3035 size_int
= XINT (size
);
3038 if (MINI_WINDOW_P (o
))
3039 error ("Attempt to split minibuffer window");
3040 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3041 error ("Attempt to split fixed-size window");
3043 check_min_window_sizes ();
3047 if (size_int
< window_min_height
)
3048 error ("Window height %d too small (after splitting)", size_int
);
3049 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3050 error ("Window height %d too small (after splitting)",
3051 XFASTINT (o
->height
) - size_int
);
3052 if (NILP (o
->parent
)
3053 || NILP (XWINDOW (o
->parent
)->vchild
))
3055 make_dummy_parent (window
);
3057 XWINDOW (new)->vchild
= window
;
3062 if (size_int
< window_min_width
)
3063 error ("Window width %d too small (after splitting)", size_int
);
3065 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3066 error ("Window width %d too small (after splitting)",
3067 XFASTINT (o
->width
) - size_int
);
3068 if (NILP (o
->parent
)
3069 || NILP (XWINDOW (o
->parent
)->hchild
))
3071 make_dummy_parent (window
);
3073 XWINDOW (new)->hchild
= window
;
3077 /* Now we know that window's parent is a vertical combination
3078 if we are dividing vertically, or a horizontal combination
3079 if we are making side-by-side windows */
3081 windows_or_buffers_changed
++;
3082 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3083 new = make_window ();
3086 p
->frame
= o
->frame
;
3088 if (!NILP (p
->next
))
3089 XWINDOW (p
->next
)->prev
= new;
3092 p
->parent
= o
->parent
;
3094 p
->window_end_valid
= Qnil
;
3095 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3097 /* Apportion the available frame space among the two new windows */
3099 if (!NILP (horflag
))
3101 p
->height
= o
->height
;
3103 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3104 XSETFASTINT (o
->width
, size_int
);
3105 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3110 p
->width
= o
->width
;
3111 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3112 XSETFASTINT (o
->height
, size_int
);
3113 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3116 /* Adjust glyph matrices. */
3118 Fset_window_buffer (new, o
->buffer
);
3122 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3123 "Make current window ARG lines bigger.\n\
3124 From program, optional second arg non-nil means grow sideways ARG columns.")
3126 register Lisp_Object arg
, side
;
3128 CHECK_NUMBER (arg
, 0);
3129 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3131 if (! NILP (Vwindow_configuration_change_hook
))
3132 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3137 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3138 "Make current window ARG lines smaller.\n\
3139 From program, optional second arg non-nil means shrink sideways arg columns.")
3141 register Lisp_Object arg
, side
;
3143 CHECK_NUMBER (arg
, 0);
3144 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3146 if (! NILP (Vwindow_configuration_change_hook
))
3147 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3153 window_height (window
)
3156 register struct window
*p
= XWINDOW (window
);
3157 return XFASTINT (p
->height
);
3161 window_width (window
)
3164 register struct window
*p
= XWINDOW (window
);
3165 return XFASTINT (p
->width
);
3170 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3172 #define CURSIZE(w) \
3173 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3176 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3177 increase its width. Siblings of the selected window are resized to
3178 fullfil the size request. If they become too small in the process,
3179 they will be deleted. */
3182 enlarge_window (window
, delta
, widthflag
)
3184 int delta
, widthflag
;
3186 Lisp_Object parent
, next
, prev
;
3190 int (*sizefun
) P_ ((Lisp_Object
))
3191 = widthflag
? window_width
: window_height
;
3192 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3193 = (widthflag
? set_window_width
: set_window_height
);
3195 /* Check values of window_min_width and window_min_height for
3197 check_min_window_sizes ();
3199 /* Give up if this window cannot be resized. */
3200 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3201 error ("Window is not resizable");
3203 /* Find the parent of the selected window. */
3206 p
= XWINDOW (window
);
3212 error ("No other window to side of this one");
3217 ? !NILP (XWINDOW (parent
)->hchild
)
3218 : !NILP (XWINDOW (parent
)->vchild
))
3224 sizep
= &CURSIZE (window
);
3227 register int maxdelta
;
3229 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3230 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3231 - window_min_size (XWINDOW (p
->next
),
3233 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3234 - window_min_size (XWINDOW (p
->prev
),
3236 /* This is a frame with only one window, a minibuffer-only
3237 or a minibufferless frame. */
3240 if (delta
> maxdelta
)
3241 /* This case traps trying to make the minibuffer
3242 the full frame, or make the only window aside from the
3243 minibuffer the full frame. */
3247 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3249 delete_window (window
);
3256 /* Find the total we can get from other siblings. */
3258 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3259 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3261 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3262 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3265 /* If we can get it all from them, do so. */
3266 if (delta
<= maximum
)
3268 Lisp_Object first_unaffected
;
3269 Lisp_Object first_affected
;
3274 first_affected
= window
;
3275 /* Look at one sibling at a time,
3276 moving away from this window in both directions alternately,
3277 and take as much as we can get without deleting that sibling. */
3278 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3282 int this_one
= ((*sizefun
) (next
)
3283 - window_min_size (XWINDOW (next
),
3284 widthflag
, 0, &fixed_p
));
3287 if (this_one
> delta
)
3290 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3291 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3296 next
= XWINDOW (next
)->next
;
3304 int this_one
= ((*sizefun
) (prev
)
3305 - window_min_size (XWINDOW (prev
),
3306 widthflag
, 0, &fixed_p
));
3309 if (this_one
> delta
)
3312 first_affected
= prev
;
3314 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3315 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3320 prev
= XWINDOW (prev
)->prev
;
3324 xassert (delta
== 0);
3326 /* Now recalculate the edge positions of all the windows affected,
3327 based on the new sizes. */
3328 first_unaffected
= next
;
3329 prev
= first_affected
;
3330 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3331 prev
= next
, next
= XWINDOW (next
)->next
)
3333 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3334 /* This does not change size of NEXT,
3335 but it propagates the new top edge to its children */
3336 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3341 register int delta1
;
3342 register int opht
= (*sizefun
) (parent
);
3344 /* If trying to grow this window to or beyond size of the parent,
3345 make delta1 so big that, on shrinking back down,
3346 all the siblings end up with less than one line and are deleted. */
3347 if (opht
<= XINT (*sizep
) + delta
)
3348 delta1
= opht
* opht
* 2;
3351 /* Otherwise, make delta1 just right so that if we add
3352 delta1 lines to this window and to the parent, and then
3353 shrink the parent back to its original size, the new
3354 proportional size of this window will increase by delta.
3356 The function size_window will compute the new height h'
3357 of the window from delta1 as:
3360 x = delta1 - delta1/n * n for the 1st resizable child
3363 where n is the number of children that can be resized.
3364 We can ignore x by choosing a delta1 that is a multiple of
3365 n. We want the height of this window to come out as
3375 The number of children n rquals the number of resizable
3376 children of this window + 1 because we know window itself
3377 is resizable (otherwise we would have signalled an error. */
3379 struct window
*w
= XWINDOW (window
);
3383 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3384 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3386 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3387 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3393 /* Add delta1 lines or columns to this window, and to the parent,
3394 keeping things consistent while not affecting siblings. */
3395 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3396 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3398 /* Squeeze out delta1 lines or columns from our parent,
3399 shriking this window and siblings proportionately.
3400 This brings parent back to correct size.
3401 Delta1 was calculated so this makes this window the desired size,
3402 taking it all out of the siblings. */
3403 (*setsizefun
) (parent
, opht
, 0);
3406 XSETFASTINT (p
->last_modified
, 0);
3407 XSETFASTINT (p
->last_overlay_modified
, 0);
3409 /* Adjust glyph matrices. */
3410 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3418 /***********************************************************************
3419 Resizing Mini-Windows
3420 ***********************************************************************/
3422 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3424 enum save_restore_action
3431 static int save_restore_orig_size
P_ ((struct window
*,
3432 enum save_restore_action
));
3434 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3435 from lowest windows first. */
3438 shrink_window_lowest_first (w
, height
)
3446 xassert (!MINI_WINDOW_P (w
));
3448 /* Set redisplay hints. */
3449 XSETFASTINT (w
->last_modified
, 0);
3450 XSETFASTINT (w
->last_overlay_modified
, 0);
3451 windows_or_buffers_changed
++;
3452 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3454 old_height
= XFASTINT (w
->height
);
3455 XSETFASTINT (w
->height
, height
);
3457 if (!NILP (w
->hchild
))
3459 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3461 c
= XWINDOW (child
);
3463 shrink_window_lowest_first (c
, height
);
3466 else if (!NILP (w
->vchild
))
3468 Lisp_Object last_child
;
3469 int delta
= old_height
- height
;
3472 /* Find the last child. We are taking space from lowest windows
3473 first, so we iterate over children from the last child
3475 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3478 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3479 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3483 c
= XWINDOW (child
);
3484 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3486 if (this_one
> delta
)
3489 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3493 /* Compute new positions. */
3494 last_top
= XINT (w
->top
);
3495 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3497 c
= XWINDOW (child
);
3498 c
->top
= make_number (last_top
);
3499 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3500 last_top
+= XFASTINT (c
->height
);
3506 /* Save, restore, or check positions and sizes in the window tree
3507 rooted at W. ACTION says what to do.
3509 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3510 members are valid for all windows in the window tree. Value is
3511 non-zero if they are valid.
3513 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3514 orig_top and orig_height for all windows in the tree.
3516 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3517 values stored in orig_top and orig_height for all windows. */
3520 save_restore_orig_size (w
, action
)
3522 enum save_restore_action action
;
3528 if (!NILP (w
->hchild
))
3530 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3533 else if (!NILP (w
->vchild
))
3535 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3541 case CHECK_ORIG_SIZES
:
3542 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3546 case SAVE_ORIG_SIZES
:
3547 w
->orig_top
= w
->top
;
3548 w
->orig_height
= w
->height
;
3549 XSETFASTINT (w
->last_modified
, 0);
3550 XSETFASTINT (w
->last_overlay_modified
, 0);
3553 case RESTORE_ORIG_SIZES
:
3554 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3555 w
->top
= w
->orig_top
;
3556 w
->height
= w
->orig_height
;
3557 w
->orig_height
= w
->orig_top
= Qnil
;
3558 XSETFASTINT (w
->last_modified
, 0);
3559 XSETFASTINT (w
->last_overlay_modified
, 0);
3566 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3573 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3574 without deleting other windows. */
3577 grow_mini_window (w
, delta
)
3581 struct frame
*f
= XFRAME (w
->frame
);
3582 struct window
*root
;
3584 xassert (MINI_WINDOW_P (w
));
3585 xassert (delta
>= 0);
3587 /* Check values of window_min_width and window_min_height for
3589 check_min_window_sizes ();
3591 /* Compute how much we can enlarge the mini-window without deleting
3593 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3596 int min_height
= window_min_size (root
, 0, 0, 0);
3597 if (XFASTINT (root
->height
) - delta
< min_height
)
3598 delta
= XFASTINT (root
->height
) - min_height
;
3603 /* Save original window sizes and positions, if not already done. */
3604 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3605 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3607 /* Shrink other windows. */
3608 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3610 /* Grow the mini-window. */
3611 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3612 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3613 XSETFASTINT (w
->last_modified
, 0);
3614 XSETFASTINT (w
->last_overlay_modified
, 0);
3621 /* Shrink mini-window W. If there is recorded info about window sizes
3622 before a call to grow_mini_window, restore recorded window sizes.
3623 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3627 shrink_mini_window (w
)
3630 struct frame
*f
= XFRAME (w
->frame
);
3631 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3633 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3635 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3637 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3638 windows_or_buffers_changed
= 1;
3640 else if (XFASTINT (w
->height
) > 1)
3643 XSETWINDOW (window
, w
);
3644 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3650 /* Mark window cursors off for all windows in the window tree rooted
3651 at W by setting their phys_cursor_on_p flag to zero. Called from
3652 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3653 the frame are cleared. */
3656 mark_window_cursors_off (w
)
3661 if (!NILP (w
->hchild
))
3662 mark_window_cursors_off (XWINDOW (w
->hchild
));
3663 else if (!NILP (w
->vchild
))
3664 mark_window_cursors_off (XWINDOW (w
->vchild
));
3666 w
->phys_cursor_on_p
= 0;
3668 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3673 /* Return number of lines of text (not counting mode line) in W. */
3676 window_internal_height (w
)
3679 int ht
= XFASTINT (w
->height
);
3681 if (MINI_WINDOW_P (w
))
3684 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3685 || !NILP (w
->next
) || !NILP (w
->prev
)
3686 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3693 /* Return the number of columns in W.
3694 Don't count columns occupied by scroll bars or the vertical bar
3695 separating W from the sibling to its right. */
3698 window_internal_width (w
)
3701 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3702 int width
= XINT (w
->width
);
3704 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3705 /* Scroll bars occupy a few columns. */
3706 width
-= FRAME_SCROLL_BAR_COLS (f
);
3707 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3708 /* The column of `|' characters separating side-by-side windows
3709 occupies one column only. */
3712 /* On window-systems, areas to the left and right of the window
3713 are used to display bitmaps there. */
3714 if (FRAME_WINDOW_P (f
))
3715 width
-= FRAME_FLAGS_AREA_COLS (f
);
3721 /************************************************************************
3723 ***********************************************************************/
3725 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3726 one screen-full, which is defined as the height of the window minus
3727 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3728 instead. Negative values of N mean scroll down. NOERROR non-zero
3729 means don't signal an error if we try to move over BEGV or ZV,
3733 window_scroll (window
, n
, whole
, noerror
)
3739 /* If we must, use the pixel-based version which is much slower than
3740 the line-based one but can handle varying line heights. */
3741 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3742 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3744 window_scroll_line_based (window
, n
, whole
, noerror
);
3748 /* Implementation of window_scroll that works based on pixel line
3749 heights. See the comment of window_scroll for parameter
3753 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3760 struct window
*w
= XWINDOW (window
);
3761 struct text_pos start
;
3763 int this_scroll_margin
;
3766 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3768 /* If PT is not visible in WINDOW, move back one half of
3770 XSETFASTINT (tem
, PT
);
3771 tem
= Fpos_visible_in_window_p (tem
, window
);
3774 /* Move backward half the height of the window. Performance note:
3775 vmotion used here is about 10% faster, but would give wrong
3776 results for variable height lines. */
3777 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3778 it
.current_y
= it
.last_visible_y
;
3779 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3781 /* The function move_iterator_vertically may move over more than
3782 the specified y-distance. If it->w is small, e.g. a
3783 mini-buffer window, we may end up in front of the window's
3784 display area. This is the case when Start displaying at the
3785 start of the line containing PT in this case. */
3786 if (it
.current_y
<= 0)
3788 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3789 move_it_vertically (&it
, 0);
3793 start
= it
.current
.pos
;
3796 /* If scroll_preserve_screen_position is non-zero, we try to set
3797 point in the same window line as it is now, so get that line. */
3798 if (!NILP (Vscroll_preserve_screen_position
))
3800 start_display (&it
, w
, start
);
3801 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3802 preserve_y
= it
.current_y
;
3807 /* Move iterator it from start the specified distance forward or
3808 backward. The result is the new window start. */
3809 start_display (&it
, w
, start
);
3812 int screen_full
= (it
.last_visible_y
3813 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3814 int direction
= n
< 0 ? -1 : 1;
3815 move_it_vertically (&it
, direction
* screen_full
);
3818 move_it_by_lines (&it
, n
, 1);
3820 /* End if we end up at ZV or BEGV. */
3821 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3822 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3826 else if (IT_CHARPOS (it
) == ZV
)
3827 Fsignal (Qend_of_buffer
, Qnil
);
3829 Fsignal (Qbeginning_of_buffer
, Qnil
);
3832 /* Set the window start, and set up the window for redisplay. */
3833 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)), w
->buffer
);
3834 w
->start_at_line_beg
= Fbolp ();
3835 w
->update_mode_line
= Qt
;
3836 XSETFASTINT (w
->last_modified
, 0);
3837 XSETFASTINT (w
->last_overlay_modified
, 0);
3838 /* Set force_start so that redisplay_window will run the
3839 window-scroll-functions. */
3840 w
->force_start
= Qt
;
3842 it
.current_y
= it
.vpos
= 0;
3844 /* Preserve the screen position if we must. */
3845 if (preserve_y
>= 0)
3847 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
3848 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
3852 /* Move PT out of scroll margins. */
3853 this_scroll_margin
= max (0, scroll_margin
);
3854 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
3855 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
3859 /* We moved the window start towards ZV, so PT may be now
3860 in the scroll margin at the top. */
3861 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3862 while (it
.current_y
< this_scroll_margin
)
3863 move_it_by_lines (&it
, 1, 1);
3864 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
3868 /* We moved the window start towards BEGV, so PT may be now
3869 in the scroll margin at the bottom. */
3870 move_it_to (&it
, PT
, -1,
3871 it
.last_visible_y
- this_scroll_margin
- 1, -1,
3872 MOVE_TO_POS
| MOVE_TO_Y
);
3874 /* Don't put point on a partially visible line at the end. */
3875 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
3876 > it
.last_visible_y
)
3877 move_it_by_lines (&it
, -1, 0);
3879 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
3885 /* Implementation of window_scroll that works based on screen lines.
3886 See the comment of window_scroll for parameter descriptions. */
3889 window_scroll_line_based (window
, n
, whole
, noerror
)
3895 register struct window
*w
= XWINDOW (window
);
3896 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
3897 register int pos
, pos_byte
;
3898 register int ht
= window_internal_height (w
);
3899 register Lisp_Object tem
;
3903 struct position posit
;
3906 startpos
= marker_position (w
->start
);
3908 posit
= *compute_motion (startpos
, 0, 0, 0,
3910 window_internal_width (w
), XINT (w
->hscroll
),
3912 original_vpos
= posit
.vpos
;
3914 XSETFASTINT (tem
, PT
);
3915 tem
= Fpos_visible_in_window_p (tem
, window
);
3919 Fvertical_motion (make_number (- (ht
/ 2)), window
);
3924 lose
= n
< 0 && PT
== BEGV
;
3925 Fvertical_motion (make_number (n
), window
);
3929 SET_PT_BOTH (opoint
, opoint_byte
);
3936 Fsignal (Qbeginning_of_buffer
, Qnil
);
3941 int this_scroll_margin
= scroll_margin
;
3943 /* Don't use a scroll margin that is negative or too large. */
3944 if (this_scroll_margin
< 0)
3945 this_scroll_margin
= 0;
3947 if (XINT (w
->height
) < 4 * scroll_margin
)
3948 this_scroll_margin
= XINT (w
->height
) / 4;
3950 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
3951 w
->start_at_line_beg
= bolp
;
3952 w
->update_mode_line
= Qt
;
3953 XSETFASTINT (w
->last_modified
, 0);
3954 XSETFASTINT (w
->last_overlay_modified
, 0);
3955 /* Set force_start so that redisplay_window will run
3956 the window-scroll-functions. */
3957 w
->force_start
= Qt
;
3959 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
3961 SET_PT_BOTH (pos
, pos_byte
);
3962 Fvertical_motion (make_number (original_vpos
), window
);
3964 /* If we scrolled forward, put point enough lines down
3965 that it is outside the scroll margin. */
3970 if (this_scroll_margin
> 0)
3972 SET_PT_BOTH (pos
, pos_byte
);
3973 Fvertical_motion (make_number (this_scroll_margin
), window
);
3979 if (top_margin
<= opoint
)
3980 SET_PT_BOTH (opoint
, opoint_byte
);
3981 else if (!NILP (Vscroll_preserve_screen_position
))
3983 SET_PT_BOTH (pos
, pos_byte
);
3984 Fvertical_motion (make_number (original_vpos
), window
);
3987 SET_PT (top_margin
);
3993 /* If we scrolled backward, put point near the end of the window
3994 but not within the scroll margin. */
3995 SET_PT_BOTH (pos
, pos_byte
);
3996 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
3997 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4000 bottom_margin
= PT
+ 1;
4002 if (bottom_margin
> opoint
)
4003 SET_PT_BOTH (opoint
, opoint_byte
);
4006 if (!NILP (Vscroll_preserve_screen_position
))
4008 SET_PT_BOTH (pos
, pos_byte
);
4009 Fvertical_motion (make_number (original_vpos
), window
);
4012 Fvertical_motion (make_number (-1), window
);
4021 Fsignal (Qend_of_buffer
, Qnil
);
4026 /* Scroll selected_window up or down. If N is nil, scroll a
4027 screen-full which is defined as the height of the window minus
4028 next_screen_context_lines. If N is the symbol `-', scroll.
4029 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4030 up. This is the guts of Fscroll_up and Fscroll_down. */
4033 scroll_command (n
, direction
)
4037 register int defalt
;
4038 int count
= specpdl_ptr
- specpdl
;
4040 xassert (abs (direction
) == 1);
4042 /* If selected window's buffer isn't current, make it current for
4043 the moment. But don't screw up if window_scroll gets an error. */
4044 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4046 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4047 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4049 /* Make redisplay consider other windows than just selected_window. */
4050 ++windows_or_buffers_changed
;
4053 defalt
= (window_internal_height (XWINDOW (selected_window
))
4054 - next_screen_context_lines
);
4055 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4058 window_scroll (selected_window
, defalt
, 1, 0);
4059 else if (EQ (n
, Qminus
))
4060 window_scroll (selected_window
, - defalt
, 1, 0);
4063 n
= Fprefix_numeric_value (n
);
4064 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4067 unbind_to (count
, Qnil
);
4070 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4071 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4072 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4073 Negative ARG means scroll downward.\n\
4074 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4075 When calling from a program, supply as argument a number, nil, or `-'.")
4079 scroll_command (arg
, 1);
4083 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4084 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4085 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4086 Negative ARG means scroll upward.\n\
4087 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4088 When calling from a program, supply as argument a number, nil, or `-'.")
4092 scroll_command (arg
, -1);
4096 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4097 "Return the other window for \"other window scroll\" commands.\n\
4098 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4099 specifies the window.\n\
4100 If `other-window-scroll-buffer' is non-nil, a window\n\
4101 showing that buffer is used.")
4106 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4107 && !NILP (Vminibuf_scroll_window
))
4108 window
= Vminibuf_scroll_window
;
4109 /* If buffer is specified, scroll that buffer. */
4110 else if (!NILP (Vother_window_scroll_buffer
))
4112 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4114 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4118 /* Nothing specified; look for a neighboring window on the same
4120 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4122 if (EQ (window
, selected_window
))
4123 /* That didn't get us anywhere; look for a window on another
4126 window
= Fnext_window (window
, Qnil
, Qt
);
4127 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4128 && ! EQ (window
, selected_window
));
4131 CHECK_LIVE_WINDOW (window
, 0);
4133 if (EQ (window
, selected_window
))
4134 error ("There is no other window");
4139 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4140 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4141 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4142 The next window is the one below the current one; or the one at the top\n\
4143 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4144 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4145 When calling from a program, supply as argument a number, nil, or `-'.\n\
4147 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4148 specifies the window to scroll.\n\
4149 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4150 showing that buffer, popping the buffer up if necessary.")
4152 register Lisp_Object arg
;
4154 register Lisp_Object window
;
4155 register int defalt
;
4156 register struct window
*w
;
4157 register int count
= specpdl_ptr
- specpdl
;
4159 window
= Fother_window_for_scrolling ();
4161 w
= XWINDOW (window
);
4162 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4163 if (defalt
< 1) defalt
= 1;
4165 /* Don't screw up if window_scroll gets an error. */
4166 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4167 ++windows_or_buffers_changed
;
4169 Fset_buffer (w
->buffer
);
4170 SET_PT (marker_position (w
->pointm
));
4173 window_scroll (window
, defalt
, 1, 1);
4174 else if (EQ (arg
, Qminus
))
4175 window_scroll (window
, -defalt
, 1, 1);
4180 CHECK_NUMBER (arg
, 0);
4181 window_scroll (window
, XINT (arg
), 0, 1);
4184 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4185 unbind_to (count
, Qnil
);
4190 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4191 "Scroll selected window display ARG columns left.\n\
4192 Default for ARG is window width minus 2.")
4194 register Lisp_Object arg
;
4198 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4200 arg
= Fprefix_numeric_value (arg
);
4203 Fset_window_hscroll (selected_window
,
4204 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4208 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4209 "Scroll selected window display ARG columns right.\n\
4210 Default for ARG is window width minus 2.")
4212 register Lisp_Object arg
;
4215 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4217 arg
= Fprefix_numeric_value (arg
);
4220 Fset_window_hscroll (selected_window
,
4221 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4225 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4226 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
4227 The desired position of point is always relative to the current window.\n\
4228 Just C-u as prefix means put point in the center of the window.\n\
4229 If ARG is omitted or nil, erases the entire frame and then\n\
4230 redraws with point in the center of the current window.")
4232 register Lisp_Object arg
;
4234 register struct window
*w
= XWINDOW (selected_window
);
4235 register int ht
= window_internal_height (w
);
4236 struct position pos
;
4237 struct buffer
*buf
= XBUFFER (w
->buffer
);
4238 struct buffer
*obuf
= current_buffer
;
4242 extern int frame_garbaged
;
4245 /* Invalidate pixel data calculated for all compositions. */
4246 for (i
= 0; i
< n_compositions
; i
++)
4247 composition_table
[i
]->font
= NULL
;
4249 Fredraw_frame (w
->frame
);
4250 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4251 XSETFASTINT (arg
, ht
/ 2);
4253 else if (CONSP (arg
)) /* Just C-u. */
4255 XSETFASTINT (arg
, ht
/ 2);
4259 arg
= Fprefix_numeric_value (arg
);
4260 CHECK_NUMBER (arg
, 0);
4264 XSETINT (arg
, XINT (arg
) + ht
);
4266 set_buffer_internal (buf
);
4267 pos
= *vmotion (PT
, - XINT (arg
), w
);
4269 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
4270 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
4271 || FETCH_BYTE (pos
.bytepos
- 1) == '\n')
4273 w
->force_start
= Qt
;
4274 set_buffer_internal (obuf
);
4280 /* Value is the number of lines actually displayed in window W,
4281 as opposed to its height. */
4284 displayed_window_lines (w
)
4288 struct text_pos start
;
4289 int height
= window_box_height (w
);
4291 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4292 start_display (&it
, w
, start
);
4293 move_it_vertically (&it
, height
);
4295 /* Add in empty lines at the bottom of the window. */
4296 if (it
.current_y
< height
)
4298 struct frame
*f
= XFRAME (w
->frame
);
4299 int rest
= height
- it
.current_y
;
4300 int lines
= (rest
+ CANON_Y_UNIT (f
) - 1) / CANON_Y_UNIT (f
);
4309 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4311 "Position point relative to window.\n\
4312 With no argument, position point at center of window.\n\
4313 An argument specifies vertical position within the window;\n\
4314 zero means top of window, negative means relative to bottom of window.")
4318 struct window
*w
= XWINDOW (selected_window
);
4322 window
= selected_window
;
4323 start
= marker_position (w
->start
);
4324 if (start
< BEGV
|| start
> ZV
)
4326 int height
= window_internal_height (w
);
4327 Fvertical_motion (make_number (- (height
/ 2)), window
);
4328 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4329 w
->start_at_line_beg
= Fbolp ();
4330 w
->force_start
= Qt
;
4333 Fgoto_char (w
->start
);
4335 lines
= displayed_window_lines (w
);
4337 XSETFASTINT (arg
, lines
/ 2);
4340 arg
= Fprefix_numeric_value (arg
);
4342 XSETINT (arg
, XINT (arg
) + lines
);
4345 return Fvertical_motion (arg
, window
);
4350 /***********************************************************************
4351 Window Configuration
4352 ***********************************************************************/
4354 struct save_window_data
4356 EMACS_INT size_from_Lisp_Vector_struct
;
4357 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4358 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4359 Lisp_Object frame_tool_bar_lines
;
4360 Lisp_Object selected_frame
;
4361 Lisp_Object current_window
;
4362 Lisp_Object current_buffer
;
4363 Lisp_Object minibuf_scroll_window
;
4364 Lisp_Object root_window
;
4365 Lisp_Object focus_frame
;
4366 /* Record the values of window-min-width and window-min-height
4367 so that window sizes remain consistent with them. */
4368 Lisp_Object min_width
, min_height
;
4369 /* A vector, each of whose elements is a struct saved_window
4371 Lisp_Object saved_windows
;
4374 /* This is saved as a Lisp_Vector */
4377 /* these first two must agree with struct Lisp_Vector in lisp.h */
4378 EMACS_INT size_from_Lisp_Vector_struct
;
4379 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4382 Lisp_Object buffer
, start
, pointm
, mark
;
4383 Lisp_Object left
, top
, width
, height
, hscroll
;
4384 Lisp_Object parent
, prev
;
4385 Lisp_Object start_at_line_beg
;
4386 Lisp_Object display_table
;
4388 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
4390 #define SAVED_WINDOW_N(swv,n) \
4391 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4393 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4394 "Return t if OBJECT is a window-configuration object.")
4398 if (WINDOW_CONFIGURATIONP (object
))
4403 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4404 "Return the frame that CONFIG, a window-configuration object, is about.")
4408 register struct save_window_data
*data
;
4409 struct Lisp_Vector
*saved_windows
;
4411 if (! WINDOW_CONFIGURATIONP (config
))
4412 wrong_type_argument (Qwindow_configuration_p
, config
);
4414 data
= (struct save_window_data
*) XVECTOR (config
);
4415 saved_windows
= XVECTOR (data
->saved_windows
);
4416 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4419 DEFUN ("set-window-configuration", Fset_window_configuration
,
4420 Sset_window_configuration
, 1, 1, 0,
4421 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4422 CONFIGURATION must be a value previously returned\n\
4423 by `current-window-configuration' (which see).\n\
4424 If CONFIGURATION was made from a frame that is now deleted,\n\
4425 only frame-independent values can be restored. In this case,\n\
4426 the return value is nil. Otherwise the value is t.")
4428 Lisp_Object configuration
;
4430 register struct save_window_data
*data
;
4431 struct Lisp_Vector
*saved_windows
;
4432 Lisp_Object new_current_buffer
;
4437 while (!WINDOW_CONFIGURATIONP (configuration
))
4438 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4440 data
= (struct save_window_data
*) XVECTOR (configuration
);
4441 saved_windows
= XVECTOR (data
->saved_windows
);
4443 new_current_buffer
= data
->current_buffer
;
4444 if (NILP (XBUFFER (new_current_buffer
)->name
))
4445 new_current_buffer
= Qnil
;
4448 if (XBUFFER (new_current_buffer
) == current_buffer
)
4453 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4456 /* If f is a dead frame, don't bother rebuilding its window tree.
4457 However, there is other stuff we should still try to do below. */
4458 if (FRAME_LIVE_P (f
))
4460 register struct window
*w
;
4461 register struct saved_window
*p
;
4462 struct window
*root_window
;
4463 struct window
**leaf_windows
;
4467 /* If the frame has been resized since this window configuration was
4468 made, we change the frame to the size specified in the
4469 configuration, restore the configuration, and then resize it
4470 back. We keep track of the prevailing height in these variables. */
4471 int previous_frame_height
= FRAME_HEIGHT (f
);
4472 int previous_frame_width
= FRAME_WIDTH (f
);
4473 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4474 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4476 /* The mouse highlighting code could get screwed up
4477 if it runs during this. */
4480 if (XFASTINT (data
->frame_height
) != previous_frame_height
4481 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4482 change_frame_size (f
, XFASTINT (data
->frame_height
),
4483 XFASTINT (data
->frame_width
), 0, 0, 0);
4484 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4485 if (XFASTINT (data
->frame_menu_bar_lines
)
4486 != previous_frame_menu_bar_lines
)
4487 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4488 #ifdef HAVE_WINDOW_SYSTEM
4489 if (XFASTINT (data
->frame_tool_bar_lines
)
4490 != previous_frame_tool_bar_lines
)
4491 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4495 /* "Swap out" point from the selected window
4496 into its buffer. We do this now, before
4497 restoring the window contents, and prevent it from
4498 being done later on when we select a new window. */
4499 if (! NILP (XWINDOW (selected_window
)->buffer
))
4501 w
= XWINDOW (selected_window
);
4502 set_marker_both (w
->pointm
,
4504 BUF_PT (XBUFFER (w
->buffer
)),
4505 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4508 windows_or_buffers_changed
++;
4509 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4511 /* Problem: Freeing all matrices and later allocating them again
4512 is a serious redisplay flickering problem. What we would
4513 really like to do is to free only those matrices not reused
4515 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4517 = (struct window
**) alloca (count_windows (root_window
)
4518 * sizeof (struct window
*));
4519 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4521 /* Temporarily avoid any problems with windows that are smaller
4522 than they are supposed to be. */
4523 window_min_height
= 1;
4524 window_min_width
= 1;
4527 Mark all windows now on frame as "deleted".
4528 Restoring the new configuration "undeletes" any that are in it.
4530 Save their current buffers in their height fields, since we may
4531 need it later, if a buffer saved in the configuration is now
4533 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4535 for (k
= 0; k
< saved_windows
->size
; k
++)
4537 p
= SAVED_WINDOW_N (saved_windows
, k
);
4538 w
= XWINDOW (p
->window
);
4541 if (!NILP (p
->parent
))
4542 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4543 XFASTINT (p
->parent
))->window
;
4547 if (!NILP (p
->prev
))
4549 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4550 XFASTINT (p
->prev
))->window
;
4551 XWINDOW (w
->prev
)->next
= p
->window
;
4556 if (!NILP (w
->parent
))
4558 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4560 XWINDOW (w
->parent
)->vchild
= p
->window
;
4561 XWINDOW (w
->parent
)->hchild
= Qnil
;
4565 XWINDOW (w
->parent
)->hchild
= p
->window
;
4566 XWINDOW (w
->parent
)->vchild
= Qnil
;
4571 /* If we squirreled away the buffer in the window's height,
4573 if (BUFFERP (w
->height
))
4574 w
->buffer
= w
->height
;
4577 w
->width
= p
->width
;
4578 w
->height
= p
->height
;
4579 w
->hscroll
= p
->hscroll
;
4580 w
->display_table
= p
->display_table
;
4581 XSETFASTINT (w
->last_modified
, 0);
4582 XSETFASTINT (w
->last_overlay_modified
, 0);
4584 /* Reinstall the saved buffer and pointers into it. */
4585 if (NILP (p
->buffer
))
4586 w
->buffer
= p
->buffer
;
4589 if (!NILP (XBUFFER (p
->buffer
)->name
))
4590 /* If saved buffer is alive, install it. */
4592 w
->buffer
= p
->buffer
;
4593 w
->start_at_line_beg
= p
->start_at_line_beg
;
4594 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4595 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4596 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4597 p
->mark
, w
->buffer
);
4599 /* As documented in Fcurrent_window_configuration, don't
4600 save the location of point in the buffer which was current
4601 when the window configuration was recorded. */
4602 if (!EQ (p
->buffer
, new_current_buffer
)
4603 && XBUFFER (p
->buffer
) == current_buffer
)
4604 Fgoto_char (w
->pointm
);
4606 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4607 /* Else unless window has a live buffer, get one. */
4609 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4610 /* This will set the markers to beginning of visible
4612 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4613 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4614 w
->start_at_line_beg
= Qt
;
4617 /* Keeping window's old buffer; make sure the markers
4620 /* Set window markers at start of visible range. */
4621 if (XMARKER (w
->start
)->buffer
== 0)
4622 set_marker_restricted (w
->start
, make_number (0),
4624 if (XMARKER (w
->pointm
)->buffer
== 0)
4625 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4626 BUF_PT (XBUFFER (w
->buffer
)),
4627 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4628 w
->start_at_line_beg
= Qt
;
4633 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4634 /* Prevent "swapping out point" in the old selected window
4635 using the buffer that has been restored into it.
4636 That swapping out has already been done,
4637 near the beginning of this function. */
4638 selected_window
= Qnil
;
4639 Fselect_window (data
->current_window
);
4640 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4643 if (NILP (data
->focus_frame
)
4644 || (FRAMEP (data
->focus_frame
)
4645 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4646 Fredirect_frame_focus (frame
, data
->focus_frame
);
4648 #if 0 /* I don't understand why this is needed, and it causes problems
4649 when the frame's old selected window has been deleted. */
4650 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4651 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4655 /* Set the screen height to the value it had before this function. */
4656 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4657 || previous_frame_width
!= FRAME_WIDTH (f
))
4658 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4660 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4661 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4662 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4664 #ifdef HAVE_WINDOW_SYSTEM
4665 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4666 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4671 /* Now, free glyph matrices in windows that were not reused. */
4672 for (i
= 0; i
< n_leaf_windows
; ++i
)
4673 if (NILP (leaf_windows
[i
]->buffer
))
4675 /* Assert it's not reused as a combination. */
4676 xassert (NILP (leaf_windows
[i
]->hchild
)
4677 && NILP (leaf_windows
[i
]->vchild
));
4678 free_window_matrices (leaf_windows
[i
]);
4679 SET_FRAME_GARBAGED (f
);
4686 /* Fselect_window will have made f the selected frame, so we
4687 reselect the proper frame here. Fhandle_switch_frame will change the
4688 selected window too, but that doesn't make the call to
4689 Fselect_window above totally superfluous; it still sets f's
4691 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
4692 do_switch_frame (data
->selected_frame
, Qnil
, 0);
4694 if (! NILP (Vwindow_configuration_change_hook
)
4695 && ! NILP (Vrun_hooks
))
4696 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4699 if (!NILP (new_current_buffer
))
4701 Fset_buffer (new_current_buffer
);
4703 /* If the buffer that is current now is the same
4704 that was current before setting the window configuration,
4705 don't alter its PT. */
4710 /* Restore the minimum heights recorded in the configuration. */
4711 window_min_height
= XINT (data
->min_height
);
4712 window_min_width
= XINT (data
->min_width
);
4714 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
4716 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
4719 /* Mark all windows now on frame as deleted
4720 by setting their buffers to nil. */
4723 delete_all_subwindows (w
)
4724 register struct window
*w
;
4726 if (!NILP (w
->next
))
4727 delete_all_subwindows (XWINDOW (w
->next
));
4728 if (!NILP (w
->vchild
))
4729 delete_all_subwindows (XWINDOW (w
->vchild
));
4730 if (!NILP (w
->hchild
))
4731 delete_all_subwindows (XWINDOW (w
->hchild
));
4733 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
4735 if (!NILP (w
->buffer
))
4738 /* We set all three of these fields to nil, to make sure that we can
4739 distinguish this dead window from any live window. Live leaf
4740 windows will have buffer set, and combination windows will have
4741 vchild or hchild set. */
4746 Vwindow_list
= Qnil
;
4750 count_windows (window
)
4751 register struct window
*window
;
4753 register int count
= 1;
4754 if (!NILP (window
->next
))
4755 count
+= count_windows (XWINDOW (window
->next
));
4756 if (!NILP (window
->vchild
))
4757 count
+= count_windows (XWINDOW (window
->vchild
));
4758 if (!NILP (window
->hchild
))
4759 count
+= count_windows (XWINDOW (window
->hchild
));
4764 /* Fill vector FLAT with leaf windows under W, starting at index I.
4765 Value is last index + 1. */
4768 get_leaf_windows (w
, flat
, i
)
4770 struct window
**flat
;
4775 if (!NILP (w
->hchild
))
4776 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
4777 else if (!NILP (w
->vchild
))
4778 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
4782 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4789 /* Return a pointer to the glyph W's physical cursor is on. Value is
4790 null if W's current matrix is invalid, so that no meaningfull glyph
4794 get_phys_cursor_glyph (w
)
4797 struct glyph_row
*row
;
4798 struct glyph
*glyph
;
4800 if (w
->phys_cursor
.vpos
>= 0
4801 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
4802 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
4804 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
4805 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
4814 save_window_save (window
, vector
, i
)
4816 struct Lisp_Vector
*vector
;
4819 register struct saved_window
*p
;
4820 register struct window
*w
;
4821 register Lisp_Object tem
;
4823 for (;!NILP (window
); window
= w
->next
)
4825 p
= SAVED_WINDOW_N (vector
, i
);
4826 w
= XWINDOW (window
);
4828 XSETFASTINT (w
->temslot
, i
++);
4830 p
->buffer
= w
->buffer
;
4833 p
->width
= w
->width
;
4834 p
->height
= w
->height
;
4835 p
->hscroll
= w
->hscroll
;
4836 p
->display_table
= w
->display_table
;
4837 if (!NILP (w
->buffer
))
4839 /* Save w's value of point in the window configuration.
4840 If w is the selected window, then get the value of point
4841 from the buffer; pointm is garbage in the selected window. */
4842 if (EQ (window
, selected_window
))
4844 p
->pointm
= Fmake_marker ();
4845 set_marker_both (p
->pointm
, w
->buffer
,
4846 BUF_PT (XBUFFER (w
->buffer
)),
4847 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4850 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
4852 p
->start
= Fcopy_marker (w
->start
, Qnil
);
4853 p
->start_at_line_beg
= w
->start_at_line_beg
;
4855 tem
= XBUFFER (w
->buffer
)->mark
;
4856 p
->mark
= Fcopy_marker (tem
, Qnil
);
4863 p
->start_at_line_beg
= Qnil
;
4866 if (NILP (w
->parent
))
4869 p
->parent
= XWINDOW (w
->parent
)->temslot
;
4874 p
->prev
= XWINDOW (w
->prev
)->temslot
;
4876 if (!NILP (w
->vchild
))
4877 i
= save_window_save (w
->vchild
, vector
, i
);
4878 if (!NILP (w
->hchild
))
4879 i
= save_window_save (w
->hchild
, vector
, i
);
4885 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
4886 Scurrent_window_configuration
, 0, 1, 0,
4887 "Return an object representing the current window configuration of FRAME.\n\
4888 If FRAME is nil or omitted, use the selected frame.\n\
4889 This describes the number of windows, their sizes and current buffers,\n\
4890 and for each displayed buffer, where display starts, and the positions of\n\
4891 point and mark. An exception is made for point in the current buffer:\n\
4892 its value is -not- saved.\n\
4893 This also records the currently selected frame, and FRAME's focus\n\
4894 redirection (see `redirect-frame-focus').")
4898 register Lisp_Object tem
;
4899 register int n_windows
;
4900 register struct save_window_data
*data
;
4901 register struct Lisp_Vector
*vec
;
4906 frame
= selected_frame
;
4907 CHECK_LIVE_FRAME (frame
, 0);
4910 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4911 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
4912 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
4913 vec
->contents
[i
] = Qnil
;
4914 vec
->size
= VECSIZE (struct save_window_data
);
4915 data
= (struct save_window_data
*)vec
;
4917 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
4918 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
4919 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
4920 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
4921 data
->selected_frame
= selected_frame
;
4922 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
4923 XSETBUFFER (data
->current_buffer
, current_buffer
);
4924 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
4925 data
->root_window
= FRAME_ROOT_WINDOW (f
);
4926 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
4927 XSETINT (data
->min_height
, window_min_height
);
4928 XSETINT (data
->min_width
, window_min_width
);
4929 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
4930 data
->saved_windows
= tem
;
4931 for (i
= 0; i
< n_windows
; i
++)
4932 XVECTOR (tem
)->contents
[i
]
4933 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
4934 save_window_save (FRAME_ROOT_WINDOW (f
),
4936 XSETWINDOW_CONFIGURATION (tem
, data
);
4940 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
4942 "Execute body, preserving window sizes and contents.\n\
4943 Restore which buffer appears in which window, where display starts,\n\
4944 and the value of point and mark for each window.\n\
4945 Also restore the choice of selected window.\n\
4946 Also restore which buffer is current.\n\
4947 Does not restore the value of point in current buffer.")
4951 register Lisp_Object val
;
4952 register int count
= specpdl_ptr
- specpdl
;
4954 record_unwind_protect (Fset_window_configuration
,
4955 Fcurrent_window_configuration (Qnil
));
4956 val
= Fprogn (args
);
4957 return unbind_to (count
, val
);
4961 /***********************************************************************
4963 ***********************************************************************/
4965 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
4967 "Set width of marginal areas of window WINDOW.\n\
4968 If window is nil, set margins of the currently selected window.\n\
4969 First parameter LEFT-WIDTH specifies the number of character\n\
4970 cells to reserve for the left marginal area. Second parameter\n\
4971 RIGHT-WIDTH does the same for the right marginal area.\n\
4972 A nil width parameter means no margin.")
4973 (window
, left
, right
)
4974 Lisp_Object window
, left
, right
;
4976 struct window
*w
= decode_window (window
);
4979 CHECK_NUMBER_OR_FLOAT (left
, 1);
4981 CHECK_NUMBER_OR_FLOAT (right
, 2);
4983 /* Check widths < 0 and translate a zero width to nil.
4984 Margins that are too wide have to be checked elsewhere. */
4985 if ((INTEGERP (left
) && XINT (left
) < 0)
4986 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
4987 XSETFASTINT (left
, 0);
4988 if (INTEGERP (left
) && XFASTINT (left
) == 0)
4991 if ((INTEGERP (right
) && XINT (right
) < 0)
4992 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
4993 XSETFASTINT (right
, 0);
4994 if (INTEGERP (right
) && XFASTINT (right
) == 0)
4997 w
->left_margin_width
= left
;
4998 w
->right_margin_width
= right
;
5000 ++windows_or_buffers_changed
;
5001 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5006 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5008 "Get width of marginal areas of window WINDOW.\n\
5009 If WINDOW is omitted or nil, use the currently selected window.\n\
5010 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5011 If a marginal area does not exist, its width will be returned\n\
5016 struct window
*w
= decode_window (window
);
5017 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5022 /***********************************************************************
5024 ***********************************************************************/
5026 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5027 "Return the amount by which WINDOW is scrolled vertically.\n\
5028 Use the selected window if WINDOW is nil or omitted.\n\
5029 Value is a multiple of the canonical character height of WINDOW.")
5038 window
= selected_window
;
5040 CHECK_WINDOW (window
, 0);
5041 w
= XWINDOW (window
);
5042 f
= XFRAME (w
->frame
);
5044 if (FRAME_WINDOW_P (f
))
5045 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5047 result
= make_number (0);
5052 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5054 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5055 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5056 non-negative multiple of the canonical character height of WINDOW.")
5058 Lisp_Object window
, vscroll
;
5064 window
= selected_window
;
5066 CHECK_WINDOW (window
, 0);
5067 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5069 w
= XWINDOW (window
);
5070 f
= XFRAME (w
->frame
);
5072 if (FRAME_WINDOW_P (f
))
5074 int old_dy
= w
->vscroll
;
5076 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5077 w
->vscroll
= min (w
->vscroll
, 0);
5079 /* Adjust glyph matrix of the frame if the virtual display
5080 area becomes larger than before. */
5081 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5084 /* Prevent redisplay shortcuts. */
5085 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5088 return Fwindow_vscroll (window
);
5092 /* Call FN for all leaf windows on frame F. FN is called with the
5093 first argument being a pointer to the leaf window, and with
5094 additional argument USER_DATA. Stops when FN returns 0. */
5097 foreach_window (f
, fn
, user_data
)
5099 int (* fn
) P_ ((struct window
*, void *));
5102 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5106 /* Helper function for foreach_window. Call FN for all leaf windows
5107 reachable from W. FN is called with the first argument being a
5108 pointer to the leaf window, and with additional argument USER_DATA.
5109 Stop when FN returns 0. Value is 0 if stopped by FN. */
5112 foreach_window_1 (w
, fn
, user_data
)
5114 int (* fn
) P_ ((struct window
*, void *));
5119 for (cont
= 1; w
&& cont
;)
5121 if (!NILP (w
->hchild
))
5122 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5123 else if (!NILP (w
->vchild
))
5124 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5126 cont
= fn (w
, user_data
);
5128 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5135 /* Freeze or unfreeze the window start of W if unless it is a
5136 mini-window or the selected window. FREEZE_P non-null means freeze
5137 the window start. */
5140 freeze_window_start (w
, freeze_p
)
5144 if (w
== XWINDOW (selected_window
)
5145 || MINI_WINDOW_P (w
)
5146 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5147 && ! NILP (Vminibuf_scroll_window
)
5148 && w
== XWINDOW (Vminibuf_scroll_window
)))
5151 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5156 /* Freeze or unfreeze the window starts of all leaf windows on frame
5157 F, except the selected window and a mini-window. FREEZE_P non-zero
5158 means freeze the window start. */
5161 freeze_window_starts (f
, freeze_p
)
5165 foreach_window (f
, freeze_window_start
, (void *) freeze_p
);
5169 /***********************************************************************
5171 ***********************************************************************/
5173 /* Return 1 if window configurations C1 and C2
5174 describe the same state of affairs. This is used by Fequal. */
5177 compare_window_configurations (c1
, c2
, ignore_positions
)
5179 int ignore_positions
;
5181 register struct save_window_data
*d1
, *d2
;
5182 struct Lisp_Vector
*sw1
, *sw2
;
5185 if (!WINDOW_CONFIGURATIONP (c1
))
5186 wrong_type_argument (Qwindow_configuration_p
, c1
);
5187 if (!WINDOW_CONFIGURATIONP (c2
))
5188 wrong_type_argument (Qwindow_configuration_p
, c2
);
5190 d1
= (struct save_window_data
*) XVECTOR (c1
);
5191 d2
= (struct save_window_data
*) XVECTOR (c2
);
5192 sw1
= XVECTOR (d1
->saved_windows
);
5193 sw2
= XVECTOR (d2
->saved_windows
);
5195 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5197 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5199 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5201 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5203 /* Don't compare the current_window field directly.
5204 Instead see w1_is_current and w2_is_current, below. */
5205 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5207 if (! ignore_positions
)
5208 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5210 /* Don't compare the root_window field.
5211 We don't require the two configurations
5212 to use the same window object,
5213 and the two root windows must be equivalent
5214 if everything else compares equal. */
5215 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5217 if (! EQ (d1
->min_width
, d2
->min_width
))
5219 if (! EQ (d1
->min_height
, d2
->min_height
))
5222 /* Verify that the two confis have the same number of windows. */
5223 if (sw1
->size
!= sw2
->size
)
5226 for (i
= 0; i
< sw1
->size
; i
++)
5228 struct saved_window
*p1
, *p2
;
5229 int w1_is_current
, w2_is_current
;
5231 p1
= SAVED_WINDOW_N (sw1
, i
);
5232 p2
= SAVED_WINDOW_N (sw2
, i
);
5234 /* Verify that the current windows in the two
5235 configurations correspond to each other. */
5236 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5237 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5239 if (w1_is_current
!= w2_is_current
)
5242 /* Verify that the corresponding windows do match. */
5243 if (! EQ (p1
->buffer
, p2
->buffer
))
5245 if (! EQ (p1
->left
, p2
->left
))
5247 if (! EQ (p1
->top
, p2
->top
))
5249 if (! EQ (p1
->width
, p2
->width
))
5251 if (! EQ (p1
->height
, p2
->height
))
5253 if (! EQ (p1
->display_table
, p2
->display_table
))
5255 if (! EQ (p1
->parent
, p2
->parent
))
5257 if (! EQ (p1
->prev
, p2
->prev
))
5259 if (! ignore_positions
)
5261 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5263 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5265 if (NILP (Fequal (p1
->start
, p2
->start
)))
5267 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5269 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5277 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5278 Scompare_window_configurations
, 2, 2, 0,
5279 "Compare two window configurations as regards the structure of windows.\n\
5280 This function ignores details such as the values of point and mark\n\
5281 and scrolling positions.")
5285 if (compare_window_configurations (x
, y
, 1))
5293 struct frame
*f
= make_terminal_frame ();
5294 XSETFRAME (selected_frame
, f
);
5295 Vterminal_frame
= selected_frame
;
5296 minibuf_window
= f
->minibuffer_window
;
5297 selected_window
= f
->selected_window
;
5298 last_nonminibuf_frame
= f
;
5300 window_initialized
= 1;
5306 Vwindow_list
= Qnil
;
5312 Qleft_bitmap_area
= intern ("left-bitmap-area");
5313 staticpro (&Qleft_bitmap_area
);
5314 Qright_bitmap_area
= intern ("right-bitmap-area");
5315 staticpro (&Qright_bitmap_area
);
5317 Qwindow_size_fixed
= intern ("window-size-fixed");
5318 staticpro (&Qwindow_size_fixed
);
5320 staticpro (&Qwindow_configuration_change_hook
);
5321 Qwindow_configuration_change_hook
5322 = intern ("window-configuration-change-hook");
5324 Qwindowp
= intern ("windowp");
5325 staticpro (&Qwindowp
);
5327 Qwindow_configuration_p
= intern ("window-configuration-p");
5328 staticpro (&Qwindow_configuration_p
);
5330 Qwindow_live_p
= intern ("window-live-p");
5331 staticpro (&Qwindow_live_p
);
5333 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5334 staticpro (&Qtemp_buffer_show_hook
);
5336 staticpro (&Vwindow_list
);
5338 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5339 "Non-nil means call as function to display a help buffer.\n\
5340 The function is called with one argument, the buffer to be displayed.\n\
5341 Used by `with-output-to-temp-buffer'.\n\
5342 If this function is used, then it must do the entire job of showing\n\
5343 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5344 Vtemp_buffer_show_function
= Qnil
;
5346 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5347 "If non-nil, function to call to handle `display-buffer'.\n\
5348 It will receive two args, the buffer and a flag which if non-nil means\n\
5349 that the currently selected window is not acceptable.\n\
5350 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5351 work using this function.");
5352 Vdisplay_buffer_function
= Qnil
;
5354 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5355 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5356 Vminibuf_scroll_window
= Qnil
;
5358 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5359 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5360 Vother_window_scroll_buffer
= Qnil
;
5362 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5363 "*Non-nil means `display-buffer' should make a separate frame.");
5366 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5367 "Function to call to handle automatic new frame creation.\n\
5368 It is called with no arguments and should return a newly created frame.\n\
5370 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5371 where `pop-up-frame-alist' would hold the default frame parameters.");
5372 Vpop_up_frame_function
= Qnil
;
5374 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5375 "*List of buffer names that should have their own special frames.\n\
5376 Displaying a buffer whose name is in this list makes a special frame for it\n\
5377 using `special-display-function'. See also `special-display-regexps'.\n\
5379 An element of the list can be a list instead of just a string.\n\
5380 There are two ways to use a list as an element:\n\
5381 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5382 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5383 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5384 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5385 All this is done by the function found in `special-display-function'.\n\
5387 If this variable appears \"not to work\", because you add a name to it\n\
5388 but that buffer still appears in the selected window, look at the\n\
5389 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5390 Those variables take precedence over this one.");
5391 Vspecial_display_buffer_names
= Qnil
;
5393 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5394 "*List of regexps saying which buffers should have their own special frames.\n\
5395 If a buffer name matches one of these regexps, it gets its own frame.\n\
5396 Displaying a buffer whose name is in this list makes a special frame for it\n\
5397 using `special-display-function'.\n\
5399 An element of the list can be a list instead of just a string.\n\
5400 There are two ways to use a list as an element:\n\
5401 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5402 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5403 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5404 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5405 All this is done by the function found in `special-display-function'.\n\
5407 If this variable appears \"not to work\", because you add a regexp to it\n\
5408 but the matching buffers still appear in the selected window, look at the\n\
5409 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5410 Those variables take precedence over this one.");
5411 Vspecial_display_regexps
= Qnil
;
5413 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5414 "Function to call to make a new frame for a special buffer.\n\
5415 It is called with two arguments, the buffer and optional buffer specific\n\
5416 data, and should return a window displaying that buffer.\n\
5417 The default value makes a separate frame for the buffer,\n\
5418 using `special-display-frame-alist' to specify the frame parameters.\n\
5420 A buffer is special if its is listed in `special-display-buffer-names'\n\
5421 or matches a regexp in `special-display-regexps'.");
5422 Vspecial_display_function
= Qnil
;
5424 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5425 "*List of buffer names that should appear in the selected window.\n\
5426 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5427 switches to it in the selected window, rather than making it appear\n\
5428 in some other window.\n\
5430 An element of the list can be a cons cell instead of just a string.\n\
5431 Then the car must be a string, which specifies the buffer name.\n\
5432 This is for compatibility with `special-display-buffer-names';\n\
5433 the cdr of the cons cell is ignored.\n\
5435 See also `same-window-regexps'.");
5436 Vsame_window_buffer_names
= Qnil
;
5438 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5439 "*List of regexps saying which buffers should appear in the selected window.\n\
5440 If a buffer name matches one of these regexps, then displaying it\n\
5441 using `display-buffer' or `pop-to-buffer' switches to it\n\
5442 in the selected window, rather than making it appear in some other window.\n\
5444 An element of the list can be a cons cell instead of just a string.\n\
5445 Then the car must be a string, which specifies the buffer name.\n\
5446 This is for compatibility with `special-display-buffer-names';\n\
5447 the cdr of the cons cell is ignored.\n\
5449 See also `same-window-buffer-names'.");
5450 Vsame_window_regexps
= Qnil
;
5452 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5453 "*Non-nil means display-buffer should make new windows.");
5456 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5457 "*Number of lines of continuity when scrolling by screenfuls.");
5458 next_screen_context_lines
= 2;
5460 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5461 "*display-buffer would prefer to split the largest window if this large.\n\
5462 If there is only one window, it is split regardless of this value.");
5463 split_height_threshold
= 500;
5465 DEFVAR_INT ("window-min-height", &window_min_height
,
5466 "*Delete any window less than this tall (including its mode line).");
5467 window_min_height
= 4;
5469 DEFVAR_INT ("window-min-width", &window_min_width
,
5470 "*Delete any window less than this wide.");
5471 window_min_width
= 10;
5473 DEFVAR_LISP ("scroll-preserve-screen-position",
5474 &Vscroll_preserve_screen_position
,
5475 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
5476 Vscroll_preserve_screen_position
= Qnil
;
5478 DEFVAR_LISP ("window-configuration-change-hook",
5479 &Vwindow_configuration_change_hook
,
5480 "Functions to call when window configuration changes.\n\
5481 The selected frame is the one whose configuration has changed.");
5482 Vwindow_configuration_change_hook
= Qnil
;
5484 defsubr (&Sselected_window
);
5485 defsubr (&Sminibuffer_window
);
5486 defsubr (&Swindow_minibuffer_p
);
5487 defsubr (&Swindowp
);
5488 defsubr (&Swindow_live_p
);
5489 defsubr (&Spos_visible_in_window_p
);
5490 defsubr (&Swindow_buffer
);
5491 defsubr (&Swindow_height
);
5492 defsubr (&Swindow_width
);
5493 defsubr (&Swindow_hscroll
);
5494 defsubr (&Sset_window_hscroll
);
5495 defsubr (&Swindow_redisplay_end_trigger
);
5496 defsubr (&Sset_window_redisplay_end_trigger
);
5497 defsubr (&Swindow_edges
);
5498 defsubr (&Scoordinates_in_window_p
);
5499 defsubr (&Swindow_at
);
5500 defsubr (&Swindow_point
);
5501 defsubr (&Swindow_start
);
5502 defsubr (&Swindow_end
);
5503 defsubr (&Sset_window_point
);
5504 defsubr (&Sset_window_start
);
5505 defsubr (&Swindow_dedicated_p
);
5506 defsubr (&Sset_window_dedicated_p
);
5507 defsubr (&Swindow_display_table
);
5508 defsubr (&Sset_window_display_table
);
5509 defsubr (&Snext_window
);
5510 defsubr (&Sprevious_window
);
5511 defsubr (&Sother_window
);
5512 defsubr (&Sget_lru_window
);
5513 defsubr (&Sget_largest_window
);
5514 defsubr (&Sget_buffer_window
);
5515 defsubr (&Sdelete_other_windows
);
5516 defsubr (&Sdelete_windows_on
);
5517 defsubr (&Sreplace_buffer_in_windows
);
5518 defsubr (&Sdelete_window
);
5519 defsubr (&Sset_window_buffer
);
5520 defsubr (&Sselect_window
);
5521 defsubr (&Sspecial_display_p
);
5522 defsubr (&Ssame_window_p
);
5523 defsubr (&Sdisplay_buffer
);
5524 defsubr (&Ssplit_window
);
5525 defsubr (&Senlarge_window
);
5526 defsubr (&Sshrink_window
);
5527 defsubr (&Sscroll_up
);
5528 defsubr (&Sscroll_down
);
5529 defsubr (&Sscroll_left
);
5530 defsubr (&Sscroll_right
);
5531 defsubr (&Sother_window_for_scrolling
);
5532 defsubr (&Sscroll_other_window
);
5533 defsubr (&Srecenter
);
5534 defsubr (&Smove_to_window_line
);
5535 defsubr (&Swindow_configuration_p
);
5536 defsubr (&Swindow_configuration_frame
);
5537 defsubr (&Sset_window_configuration
);
5538 defsubr (&Scurrent_window_configuration
);
5539 defsubr (&Ssave_window_excursion
);
5540 defsubr (&Sset_window_margins
);
5541 defsubr (&Swindow_margins
);
5542 defsubr (&Swindow_vscroll
);
5543 defsubr (&Sset_window_vscroll
);
5544 defsubr (&Scompare_window_configurations
);
5545 defsubr (&Swindow_list
);
5551 initial_define_key (control_x_map
, '1', "delete-other-windows");
5552 initial_define_key (control_x_map
, '2', "split-window");
5553 initial_define_key (control_x_map
, '0', "delete-window");
5554 initial_define_key (control_x_map
, 'o', "other-window");
5555 initial_define_key (control_x_map
, '^', "enlarge-window");
5556 initial_define_key (control_x_map
, '<', "scroll-left");
5557 initial_define_key (control_x_map
, '>', "scroll-right");
5559 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5560 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5561 initial_define_key (meta_map
, 'v', "scroll-down");
5563 initial_define_key (global_map
, Ctl('L'), "recenter");
5564 initial_define_key (meta_map
, 'r', "move-to-window-line");