1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,1997 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 "blockinput.h"
34 Lisp_Object Qwindowp
, Qwindow_live_p
;
36 static struct window
*decode_window
P_ ((Lisp_Object
));
38 /* This is the window in which the terminal's cursor should
39 be left when nothing is being done with it. This must
40 always be a leaf window, and its buffer is selected by
41 the top level editing loop at the end of each command.
43 This value is always the same as
44 FRAME_SELECTED_WINDOW (selected_frame). */
46 Lisp_Object selected_window
;
48 /* The minibuffer window of the selected frame.
49 Note that you cannot test for minibufferness of an arbitrary window
50 by comparing against this; but you can test for minibufferness of
51 the selected window. */
52 Lisp_Object minibuf_window
;
54 /* Non-nil means it is the window for C-M-v to scroll
55 when the minibuffer is selected. */
56 Lisp_Object Vminibuf_scroll_window
;
58 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
59 Lisp_Object Vother_window_scroll_buffer
;
61 /* Non-nil means it's function to call to display temp buffers. */
62 Lisp_Object Vtemp_buffer_show_function
;
64 /* If a window gets smaller than either of these, it is removed. */
65 int window_min_height
;
68 /* Nonzero implies Fdisplay_buffer should create windows. */
71 /* Nonzero implies make new frames for Fdisplay_buffer. */
74 /* Non-nil means use this function instead of default */
75 Lisp_Object Vpop_up_frame_function
;
77 /* Function to call to handle Fdisplay_buffer. */
78 Lisp_Object Vdisplay_buffer_function
;
80 /* List of buffer *names* for buffers that should have their own frames. */
81 Lisp_Object Vspecial_display_buffer_names
;
83 /* List of regexps for buffer names that should have their own frames. */
84 Lisp_Object Vspecial_display_regexps
;
86 /* Function to pop up a special frame. */
87 Lisp_Object Vspecial_display_function
;
89 /* List of buffer *names* for buffers to appear in selected window. */
90 Lisp_Object Vsame_window_buffer_names
;
92 /* List of regexps for buffer names to appear in selected window. */
93 Lisp_Object Vsame_window_regexps
;
95 /* Hook run at end of temp_output_buffer_show. */
96 Lisp_Object Qtemp_buffer_show_hook
;
98 /* Fdisplay_buffer always splits the largest window
99 if that window is more than this high. */
100 int split_height_threshold
;
102 /* Number of lines of continuity in scrolling by screenfuls. */
103 int next_screen_context_lines
;
105 /* Incremented for each window created. */
106 static int sequence_number
;
108 /* Nonzero after init_window_once has finished. */
109 static int window_initialized
;
111 /* Hook to run when window config changes. */
112 Lisp_Object Qwindow_configuration_change_hook
;
113 Lisp_Object Vwindow_configuration_change_hook
;
115 /* Nonzero means scroll commands try to put point
116 at the same screen height as previously. */
117 static int scroll_preserve_screen_position
;
119 /* Nonzero means we can split a frame even if it is "unsplittable". */
120 static int inhibit_frame_unsplittable
;
122 #define min(a, b) ((a) < (b) ? (a) : (b))
124 extern int scroll_margin
;
126 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
128 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
129 "Returns t if OBJECT is a window.")
133 return WINDOWP (object
) ? Qt
: Qnil
;
136 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
137 "Returns t if OBJECT is a window which is currently visible.")
141 return (WINDOWP (object
) && ! NILP (XWINDOW (object
)->buffer
) ? Qt
: Qnil
);
148 register struct window
*p
;
149 register struct Lisp_Vector
*vec
;
152 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct window
));
153 for (i
= 0; i
< VECSIZE (struct window
); i
++)
154 vec
->contents
[i
] = Qnil
;
155 vec
->size
= VECSIZE (struct window
);
156 p
= (struct window
*)vec
;
157 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
158 XSETFASTINT (p
->left
, 0);
159 XSETFASTINT (p
->top
, 0);
160 XSETFASTINT (p
->height
, 0);
161 XSETFASTINT (p
->width
, 0);
162 XSETFASTINT (p
->hscroll
, 0);
163 XSETFASTINT (p
->last_point_x
, 0);
164 XSETFASTINT (p
->last_point_y
, 0);
165 p
->start
= Fmake_marker ();
166 p
->pointm
= Fmake_marker ();
167 XSETFASTINT (p
->use_time
, 0);
169 p
->display_table
= Qnil
;
175 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
176 "Return the window that the cursor now appears in and commands apply to.")
179 return selected_window
;
182 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
183 "Return the window used now for minibuffers.\n\
184 If the optional argument FRAME is specified, return the minibuffer window\n\
185 used by that frame.")
190 XSETFRAME (frame
, selected_frame
);
192 CHECK_LIVE_FRAME (frame
, 0);
194 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
197 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
198 "Returns non-nil if WINDOW is a minibuffer window.")
202 struct window
*w
= decode_window (window
);
203 return (MINI_WINDOW_P (w
) ? Qt
: Qnil
);
206 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
207 Spos_visible_in_window_p
, 0, 2, 0,
208 "Return t if position POS is currently on the frame in WINDOW.\n\
209 Returns nil if that position is scrolled vertically out of view.\n\
210 POS defaults to point; WINDOW, to the selected window.")
212 Lisp_Object pos
, window
;
214 register struct window
*w
;
218 register struct buffer
*buf
;
219 struct position posval
;
226 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
230 w
= decode_window (window
);
231 top
= marker_position (w
->start
);
232 hscroll
= XINT (w
->hscroll
);
237 height
= XFASTINT (w
->height
) - ! MINI_WINDOW_P (w
);
239 buf
= XBUFFER (w
->buffer
);
240 if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
241 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
))
243 /* If frame is up to date,
244 use the info recorded about how much text fit on it. */
245 if (posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
)
246 || (XFASTINT (w
->window_end_vpos
) < height
))
252 if (posint
> BUF_ZV (buf
))
255 /* w->start can be out of range. If it is, do something reasonable. */
256 if (top
< BUF_BEGV (buf
) || top
> BUF_ZV (buf
))
259 /* If that info is not correct, calculate afresh */
260 /* BUG FIX for the 7th arg (TOHPOS).
262 '0' is harmless, however, ' - (1 << (BITS_PER_SHORT - 1))' is
263 more appropriate here. In case of HSCROLL > 0, this can avoid
264 needless calculation done until (HPOS == 0).
266 We want to determine if the position POSINT is in HEIGHT or
267 not. We don't have to do calculation until (HPOS == 0). We
268 can stop it when VPOS goes beyond HEIGHT. */
269 posval
= *compute_motion (top
, 0, (hscroll
? 1 - hscroll
: 0), 0,
270 posint
, height
, - (1 << (BITS_PER_SHORT
- 1)),
271 window_internal_width (w
) - 1,
274 return posval
.vpos
< height
? Qt
: Qnil
;
278 static struct window
*
279 decode_window (window
)
280 register Lisp_Object window
;
283 return XWINDOW (selected_window
);
285 CHECK_LIVE_WINDOW (window
, 0);
286 return XWINDOW (window
);
289 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
290 "Return the buffer that WINDOW is displaying.")
294 return decode_window (window
)->buffer
;
297 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
298 "Return the number of lines in WINDOW (including its mode line).")
302 return decode_window (window
)->height
;
305 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
306 "Return the number of display columns in WINDOW.\n\
307 This is the width that is usable columns available for text in WINDOW.\n\
308 If you want to find out how many columns WINDOW takes up,\n\
309 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
313 return make_number (window_internal_width (decode_window (window
)));
316 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
317 "Return the number of columns by which WINDOW is scrolled from left margin.")
321 return decode_window (window
)->hscroll
;
324 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
325 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
326 NCOL should be zero or positive.")
328 register Lisp_Object window
, ncol
;
330 register struct window
*w
;
332 CHECK_NUMBER (ncol
, 1);
333 if (XINT (ncol
) < 0) XSETFASTINT (ncol
, 0);
334 w
= decode_window (window
);
335 if (XINT (w
->hscroll
) != XINT (ncol
))
336 XBUFFER (w
->buffer
)->clip_changed
= 1; /* Prevent redisplay shortcuts */
341 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
342 Swindow_redisplay_end_trigger
, 0, 1, 0,
343 "Return WINDOW's redisplay end trigger value.\n\
344 See `set-window-redisplay-end-trigger' for more information.")
348 return decode_window (window
)->redisplay_end_trigger
;
351 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
352 Sset_window_redisplay_end_trigger
, 2, 2, 0,
353 "Set WINDOW's redisplay end trigger value to VALUE.\n\
354 VALUE should be a buffer position (typically a marker) or nil.\n\
355 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
356 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
357 with two arguments: WINDOW, and the end trigger value.\n\
358 Afterwards the end-trigger value is reset to nil.")
360 register Lisp_Object window
, value
;
362 register struct window
*w
;
364 w
= decode_window (window
);
365 w
->redisplay_end_trigger
= value
;
369 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
370 "Return a list of the edge coordinates of WINDOW.\n\
371 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
372 RIGHT is one more than the rightmost column used by WINDOW,\n\
373 and BOTTOM is one more than the bottommost row used by WINDOW\n\
378 register struct window
*w
= decode_window (window
);
380 return Fcons (w
->left
, Fcons (w
->top
,
381 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
382 Fcons (make_number (XFASTINT (w
->top
)
383 + XFASTINT (w
->height
)),
387 /* Test if the character at column *x, row *y is within window *w.
388 If it is not, return 0;
389 if it is in the window's text area,
390 set *x and *y to its location relative to the upper left corner
393 if it is on the window's modeline, return 2;
394 if it is on the border between the window and its right sibling,
397 coordinates_in_window (w
, x
, y
)
398 register struct window
*w
;
401 register int left
= XINT (w
->left
);
402 register int right_edge
= WINDOW_RIGHT_EDGE (w
);
403 register int left_margin
= WINDOW_LEFT_MARGIN (w
);
404 register int right_margin
= WINDOW_RIGHT_MARGIN (w
);
405 register int window_height
= XINT (w
->height
);
406 register int top
= XFASTINT (w
->top
);
408 if ( *x
< left
|| *x
>= right_edge
409 || *y
< top
|| *y
>= top
+ window_height
)
412 if (left_margin
!= left
&& *x
< left_margin
&& *x
>= left
)
415 if (right_margin
!= right_edge
&& *x
>= right_margin
&& *x
< right_edge
)
418 /* Is the character is the mode line? */
419 if (*y
== top
+ window_height
- 1
420 && ! MINI_WINDOW_P (w
))
423 *x
-= WINDOW_LEFT_MARGIN (w
);
428 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
429 Scoordinates_in_window_p
, 2, 2, 0,
430 "Return non-nil if COORDINATES are in WINDOW.\n\
431 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
432 measured in characters from the upper-left corner of the frame.\n\
433 (0 . 0) denotes the character in the upper left corner of the\n\
435 If COORDINATES are in the text portion of WINDOW,\n\
436 the coordinates relative to the window are returned.\n\
437 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
438 If they are on the border between WINDOW and its right sibling,\n\
439 `vertical-line' is returned.")
440 (coordinates
, window
)
441 register Lisp_Object coordinates
, window
;
445 CHECK_LIVE_WINDOW (window
, 0);
446 CHECK_CONS (coordinates
, 1);
447 x
= XINT (Fcar (coordinates
));
448 y
= XINT (Fcdr (coordinates
));
450 switch (coordinates_in_window (XWINDOW (window
), &x
, &y
))
452 case 0: /* NOT in window at all. */
455 case 1: /* In text part of window. */
456 return Fcons (make_number (x
), make_number (y
));
458 case 2: /* In mode line of window. */
461 case 3: /* On right border of window. */
462 return Qvertical_line
;
469 /* Find the window containing column x, row y, and return it as a
470 Lisp_Object. If x, y is on the window's modeline, set *part
471 to 1; if it is on the separating line between the window and its
472 right sibling, set it to 2; otherwise set it to 0. If there is no
473 window under x, y return nil and leave *part unmodified. */
475 window_from_coordinates (frame
, x
, y
, part
)
480 register Lisp_Object tem
, first
;
482 tem
= first
= FRAME_SELECTED_WINDOW (frame
);
486 int found
= coordinates_in_window (XWINDOW (tem
), &x
, &y
);
494 tem
= Fnext_window (tem
, Qt
, Qlambda
);
496 while (! EQ (tem
, first
));
501 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
502 "Return window containing coordinates X and Y on FRAME.\n\
503 If omitted, FRAME defaults to the currently selected frame.\n\
504 The top left corner of the frame is considered to be row 0,\n\
507 Lisp_Object x
, y
, frame
;
512 XSETFRAME (frame
, selected_frame
);
514 CHECK_LIVE_FRAME (frame
, 2);
518 return window_from_coordinates (XFRAME (frame
),
523 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
524 "Return current value of point in WINDOW.\n\
525 For a nonselected window, this is the value point would have\n\
526 if that window were selected.\n\
528 Note that, when WINDOW is the selected window and its buffer\n\
529 is also currently selected, the value returned is the same as (point).\n\
530 It would be more strictly correct to return the `top-level' value\n\
531 of point, outside of any save-excursion forms.\n\
532 But that is hard to define.")
536 register struct window
*w
= decode_window (window
);
538 if (w
== XWINDOW (selected_window
)
539 && current_buffer
== XBUFFER (w
->buffer
))
541 return Fmarker_position (w
->pointm
);
544 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
545 "Return position at which display currently starts in WINDOW.\n\
546 This is updated by redisplay or by calling `set-window-start'.")
550 return Fmarker_position (decode_window (window
)->start
);
553 /* This is text temporarily removed from the doc string below.
555 This function returns nil if the position is not currently known.\n\
556 That happens when redisplay is preempted and doesn't finish.\n\
557 If in that case you want to compute where the end of the window would\n\
558 have been if redisplay had finished, do this:\n\
560 (goto-char (window-start window))\n\
561 (vertical-motion (1- (window-height window)) window)\n\
564 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 1, 0,
565 "Return position at which display currently ends in WINDOW.\n\
566 This is updated by redisplay, when it runs to completion.\n\
567 Simply changing the buffer text or setting `window-start'\n\
568 does not update this value.")
573 struct window
*w
= decode_window (window
);
577 CHECK_BUFFER (buf
, 0);
579 #if 0 /* This change broke some things. We should make it later. */
580 /* If we don't know the end position, return nil.
581 The user can compute it with vertical-motion if he wants to.
582 It would be nicer to do it automatically,
583 but that's so slow that it would probably bother people. */
584 if (NILP (w
->window_end_valid
))
589 BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
594 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
595 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
597 Lisp_Object window
, pos
;
599 register struct window
*w
= decode_window (window
);
601 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
602 if (w
== XWINDOW (selected_window
))
605 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
610 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
611 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
612 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
613 from overriding motion of point in order to display at this exact start.")
614 (window
, pos
, noforce
)
615 Lisp_Object window
, pos
, noforce
;
617 register struct window
*w
= decode_window (window
);
619 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
620 set_marker_restricted (w
->start
, pos
, w
->buffer
);
621 /* this is not right, but much easier than doing what is right. */
622 w
->start_at_line_beg
= Qnil
;
625 w
->update_mode_line
= Qt
;
626 XSETFASTINT (w
->last_modified
, 0);
627 XSETFASTINT (w
->last_overlay_modified
, 0);
628 if (!EQ (window
, selected_window
))
629 windows_or_buffers_changed
++;
633 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
635 "Return WINDOW's dedicated object, usually t or nil.\n\
636 See also `set-window-dedicated-p'.")
640 return decode_window (window
)->dedicated
;
643 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
644 Sset_window_dedicated_p
, 2, 2, 0,
645 "Control whether WINDOW is dedicated to the buffer it displays.\n\
646 If it is dedicated, Emacs will not automatically change\n\
647 which buffer appears in it.\n\
648 The second argument is the new value for the dedication flag;\n\
651 Lisp_Object window
, arg
;
653 register struct window
*w
= decode_window (window
);
663 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
665 "Return the display-table that WINDOW is using.")
669 return decode_window (window
)->display_table
;
672 /* Get the display table for use currently on window W.
673 This is either W's display table or W's buffer's display table.
674 Ignore the specified tables if they are not valid;
675 if no valid table is specified, return 0. */
677 struct Lisp_Char_Table
*
678 window_display_table (w
)
682 tem
= w
->display_table
;
683 if (DISP_TABLE_P (tem
))
684 return XCHAR_TABLE (tem
);
685 tem
= XBUFFER (w
->buffer
)->display_table
;
686 if (DISP_TABLE_P (tem
))
687 return XCHAR_TABLE (tem
);
688 tem
= Vstandard_display_table
;
689 if (DISP_TABLE_P (tem
))
690 return XCHAR_TABLE (tem
);
694 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
695 "Set WINDOW's display-table to TABLE.")
697 register Lisp_Object window
, table
;
699 register struct window
*w
;
700 register Lisp_Object z
; /* Return value. */
702 w
= decode_window (window
);
703 w
->display_table
= table
;
707 /* Record info on buffer window w is displaying
708 when it is about to cease to display that buffer. */
711 register struct window
*w
;
718 if (b
!= XMARKER (w
->pointm
)->buffer
)
721 if (w
== XWINDOW (b
->last_selected_window
))
722 b
->last_selected_window
= Qnil
;
725 if (w
== XWINDOW (selected_window
)
726 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
727 /* Do this except when the selected window's buffer
728 is being removed from some other window. */
730 /* last_window_start records the start position that this buffer
731 had in the last window to be disconnected from it.
732 Now that this statement is unconditional,
733 it is possible for the buffer to be displayed in the
734 selected window, while last_window_start reflects another
735 window which was recently showing the same buffer.
736 Some people might say that might be a good thing. Let's see. */
737 b
->last_window_start
= marker_position (w
->start
);
739 /* Point in the selected window's buffer
740 is actually stored in that buffer, and the window's pointm isn't used.
741 So don't clobber point in that buffer. */
742 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
))
743 temp_set_point_both (b
,
744 clip_to_bounds (BUF_BEGV (b
),
745 XMARKER (w
->pointm
)->charpos
,
747 clip_to_bounds (BUF_BEGV_BYTE (b
),
748 marker_byte_position (w
->pointm
),
752 /* Put replacement into the window structure in place of old. */
754 replace_window (old
, replacement
)
755 Lisp_Object old
, replacement
;
757 register Lisp_Object tem
;
758 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
760 /* If OLD is its frame's root_window, then replacement is the new
761 root_window for that frame. */
763 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
764 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
769 p
->height
= o
->height
;
771 p
->next
= tem
= o
->next
;
773 XWINDOW (tem
)->prev
= replacement
;
775 p
->prev
= tem
= o
->prev
;
777 XWINDOW (tem
)->next
= replacement
;
779 p
->parent
= tem
= o
->parent
;
782 if (EQ (XWINDOW (tem
)->vchild
, old
))
783 XWINDOW (tem
)->vchild
= replacement
;
784 if (EQ (XWINDOW (tem
)->hchild
, old
))
785 XWINDOW (tem
)->hchild
= replacement
;
788 /*** Here, if replacement is a vertical combination
789 and so is its new parent, we should make replacement's
790 children be children of that parent instead. ***/
793 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
794 "Remove WINDOW from the display. Default is selected window.")
796 register Lisp_Object window
;
798 delete_window (window
);
800 if (! NILP (Vwindow_configuration_change_hook
)
801 && ! NILP (Vrun_hooks
))
802 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
808 delete_window (window
)
809 register Lisp_Object window
;
811 register Lisp_Object tem
, parent
, sib
;
812 register struct window
*p
;
813 register struct window
*par
;
815 /* Because this function is called by other C code on non-leaf
816 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
817 so we can't decode_window here. */
819 window
= selected_window
;
821 CHECK_WINDOW (window
, 0);
822 p
= XWINDOW (window
);
824 /* It's okay to delete an already-deleted window. */
832 error ("Attempt to delete minibuffer or sole ordinary window");
833 par
= XWINDOW (parent
);
835 windows_or_buffers_changed
++;
836 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (p
))) = 1;
838 /* Are we trying to delete any frame's selected window? */
840 Lisp_Object frame
, pwindow
;
842 /* See if the frame's selected window is either WINDOW
843 or any subwindow of it, by finding all that window's parents
844 and comparing each one with WINDOW. */
845 frame
= WINDOW_FRAME (XWINDOW (window
));
846 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
848 while (!NILP (pwindow
))
850 if (EQ (window
, pwindow
))
852 pwindow
= XWINDOW (pwindow
)->parent
;
855 if (EQ (window
, pwindow
))
857 Lisp_Object alternative
;
858 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
860 /* If we're about to delete the selected window on the
861 selected frame, then we should use Fselect_window to select
862 the new window. On the other hand, if we're about to
863 delete the selected window on any other frame, we shouldn't do
864 anything but set the frame's selected_window slot. */
865 if (EQ (window
, selected_window
))
866 Fselect_window (alternative
);
868 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
873 /* tem is null for dummy parent windows
874 (which have inferiors but not any contents themselves) */
878 unchain_marker (p
->pointm
);
879 unchain_marker (p
->start
);
884 XWINDOW (tem
)->prev
= p
->prev
;
888 XWINDOW (tem
)->next
= p
->next
;
890 if (EQ (window
, par
->hchild
))
891 par
->hchild
= p
->next
;
892 if (EQ (window
, par
->vchild
))
893 par
->vchild
= p
->next
;
895 /* Find one of our siblings to give our space to. */
899 /* If p gives its space to its next sibling, that sibling needs
900 to have its top/left side pulled back to where p's is.
901 set_window_{height,width} will re-position the sibling's
904 XWINDOW (sib
)->top
= p
->top
;
905 XWINDOW (sib
)->left
= p
->left
;
908 /* Stretch that sibling. */
909 if (!NILP (par
->vchild
))
910 set_window_height (sib
,
911 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
913 if (!NILP (par
->hchild
))
914 set_window_width (sib
,
915 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
918 /* If parent now has only one child,
919 put the child into the parent's place. */
923 if (NILP (XWINDOW (tem
)->next
))
924 replace_window (parent
, tem
);
926 /* Since we may be deleting combination windows, we must make sure that
927 not only p but all its children have been marked as deleted. */
928 if (! NILP (p
->hchild
))
929 delete_all_subwindows (XWINDOW (p
->hchild
));
930 else if (! NILP (p
->vchild
))
931 delete_all_subwindows (XWINDOW (p
->vchild
));
933 /* Mark this window as deleted. */
934 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
938 extern Lisp_Object
next_frame (), prev_frame ();
940 /* This comment supplies the doc string for `next-window',
941 for make-docfile to see. We cannot put this in the real DEFUN
942 due to limits in the Unix cpp.
944 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
945 "Return next window after WINDOW in canonical ordering of windows.\n\
946 If omitted, WINDOW defaults to the selected window.\n\
948 Optional second arg MINIBUF t means count the minibuffer window even\n\
949 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
950 it is active. MINIBUF neither t nor nil means not to count the\n\
951 minibuffer even if it is active.\n\
953 Several frames may share a single minibuffer; if the minibuffer\n\
954 counts, all windows on all frames that share that minibuffer count\n\
955 too. Therefore, `next-window' can be used to iterate through the\n\
956 set of windows even when the minibuffer is on another frame. If the\n\
957 minibuffer does not count, only windows from WINDOW's frame count.\n\
959 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
960 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
961 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
962 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
963 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
964 Anything else means restrict to WINDOW's frame.\n\
966 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
967 `next-window' to iterate through the entire cycle of acceptable\n\
968 windows, eventually ending up back at the window you started with.\n\
969 `previous-window' traverses the same cycle, in the reverse order.")
970 (window, minibuf, all_frames) */
972 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
974 (window
, minibuf
, all_frames
)
975 register Lisp_Object window
, minibuf
, all_frames
;
977 register Lisp_Object tem
;
978 Lisp_Object start_window
;
981 window
= selected_window
;
983 CHECK_LIVE_WINDOW (window
, 0);
985 start_window
= window
;
987 /* minibuf == nil may or may not include minibuffers.
988 Decide if it does. */
990 minibuf
= (minibuf_level
? minibuf_window
: Qlambda
);
991 else if (! EQ (minibuf
, Qt
))
993 /* Now minibuf can be t => count all minibuffer windows,
994 lambda => count none of them,
995 or a specific minibuffer window (the active one) to count. */
997 /* all_frames == nil doesn't specify which frames to include. */
998 if (NILP (all_frames
))
999 all_frames
= (! EQ (minibuf
, Qlambda
)
1000 ? (FRAME_MINIBUF_WINDOW
1003 (XWINDOW (window
)))))
1005 else if (EQ (all_frames
, Qvisible
))
1007 else if (XFASTINT (all_frames
) == 0)
1009 else if (FRAMEP (all_frames
) && ! EQ (all_frames
, Fwindow_frame (window
)))
1010 /* If all_frames is a frame and window arg isn't on that frame, just
1011 return the first window on the frame. */
1012 return Fframe_first_window (all_frames
);
1013 else if (! EQ (all_frames
, Qt
))
1015 /* Now all_frames is t meaning search all frames,
1016 nil meaning search just current frame,
1017 visible meaning search just visible frames,
1018 0 meaning search visible and iconified frames,
1019 or a window, meaning search the frame that window belongs to. */
1021 /* Do this loop at least once, to get the next window, and perhaps
1022 again, if we hit the minibuffer and that is not acceptable. */
1025 /* Find a window that actually has a next one. This loop
1026 climbs up the tree. */
1027 while (tem
= XWINDOW (window
)->next
, NILP (tem
))
1028 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1032 /* We've reached the end of this frame.
1033 Which other frames are acceptable? */
1034 tem
= WINDOW_FRAME (XWINDOW (window
));
1035 if (! NILP (all_frames
))
1040 tem
= next_frame (tem
, all_frames
);
1041 /* In the case where the minibuffer is active,
1042 and we include its frame as well as the selected one,
1043 next_frame may get stuck in that frame.
1044 If that happens, go back to the selected frame
1045 so we can complete the cycle. */
1047 XSETFRAME (tem
, selected_frame
);
1049 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1056 /* If we're in a combination window, find its first child and
1057 recurse on that. Otherwise, we've found the window we want. */
1060 if (!NILP (XWINDOW (window
)->hchild
))
1061 window
= XWINDOW (window
)->hchild
;
1062 else if (!NILP (XWINDOW (window
)->vchild
))
1063 window
= XWINDOW (window
)->vchild
;
1067 /* Which windows are acceptable?
1068 Exit the loop and accept this window if
1069 this isn't a minibuffer window,
1070 or we're accepting all minibuffer windows,
1071 or this is the active minibuffer and we are accepting that one, or
1072 we've come all the way around and we're back at the original window. */
1073 while (MINI_WINDOW_P (XWINDOW (window
))
1074 && ! EQ (minibuf
, Qt
)
1075 && ! EQ (minibuf
, window
)
1076 && ! EQ (window
, start_window
));
1081 /* This comment supplies the doc string for `previous-window',
1082 for make-docfile to see. We cannot put this in the real DEFUN
1083 due to limits in the Unix cpp.
1085 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1086 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1087 If omitted, WINDOW defaults to the selected window.\n\
1089 Optional second arg MINIBUF t means count the minibuffer window even\n\
1090 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1091 it is active. MINIBUF neither t nor nil means not to count the\n\
1092 minibuffer even if it is active.\n\
1094 Several frames may share a single minibuffer; if the minibuffer\n\
1095 counts, all windows on all frames that share that minibuffer count\n\
1096 too. Therefore, `previous-window' can be used to iterate through\n\
1097 the set of windows even when the minibuffer is on another frame. If\n\
1098 the minibuffer does not count, only windows from WINDOW's frame count\n\
1100 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1101 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1102 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1103 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1104 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1105 Anything else means restrict to WINDOW's frame.\n\
1107 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1108 `previous-window' to iterate through the entire cycle of acceptable\n\
1109 windows, eventually ending up back at the window you started with.\n\
1110 `next-window' traverses the same cycle, in the reverse order.")
1111 (window, minibuf, all_frames) */
1114 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1116 (window
, minibuf
, all_frames
)
1117 register Lisp_Object window
, minibuf
, all_frames
;
1119 register Lisp_Object tem
;
1120 Lisp_Object start_window
;
1123 window
= selected_window
;
1125 CHECK_LIVE_WINDOW (window
, 0);
1127 start_window
= window
;
1129 /* minibuf == nil may or may not include minibuffers.
1130 Decide if it does. */
1132 minibuf
= (minibuf_level
? minibuf_window
: Qlambda
);
1133 else if (! EQ (minibuf
, Qt
))
1135 /* Now minibuf can be t => count all minibuffer windows,
1136 lambda => count none of them,
1137 or a specific minibuffer window (the active one) to count. */
1139 /* all_frames == nil doesn't specify which frames to include.
1140 Decide which frames it includes. */
1141 if (NILP (all_frames
))
1142 all_frames
= (! EQ (minibuf
, Qlambda
)
1143 ? (FRAME_MINIBUF_WINDOW
1146 (XWINDOW (window
)))))
1148 else if (EQ (all_frames
, Qvisible
))
1150 else if (XFASTINT (all_frames
) == 0)
1152 else if (FRAMEP (all_frames
) && ! EQ (all_frames
, Fwindow_frame (window
)))
1153 /* If all_frames is a frame and window arg isn't on that frame, just
1154 return the first window on the frame. */
1155 return Fframe_first_window (all_frames
);
1156 else if (! EQ (all_frames
, Qt
))
1158 /* Now all_frames is t meaning search all frames,
1159 nil meaning search just current frame,
1160 visible meaning search just visible frames,
1161 0 meaning search visible and iconified frames,
1162 or a window, meaning search the frame that window belongs to. */
1164 /* Do this loop at least once, to get the previous window, and perhaps
1165 again, if we hit the minibuffer and that is not acceptable. */
1168 /* Find a window that actually has a previous one. This loop
1169 climbs up the tree. */
1170 while (tem
= XWINDOW (window
)->prev
, NILP (tem
))
1171 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1175 /* We have found the top window on the frame.
1176 Which frames are acceptable? */
1177 tem
= WINDOW_FRAME (XWINDOW (window
));
1178 if (! NILP (all_frames
))
1179 /* It's actually important that we use prev_frame here,
1180 rather than next_frame. All the windows acceptable
1181 according to the given parameters should form a ring;
1182 Fnext_window and Fprevious_window should go back and
1183 forth around the ring. If we use next_frame here,
1184 then Fnext_window and Fprevious_window take different
1185 paths through the set of acceptable windows.
1186 window_loop assumes that these `ring' requirement are
1192 tem
= prev_frame (tem
, all_frames
);
1193 /* In the case where the minibuffer is active,
1194 and we include its frame as well as the selected one,
1195 next_frame may get stuck in that frame.
1196 If that happens, go back to the selected frame
1197 so we can complete the cycle. */
1199 XSETFRAME (tem
, selected_frame
);
1201 /* If this frame has a minibuffer, find that window first,
1202 because it is conceptually the last window in that frame. */
1203 if (FRAME_HAS_MINIBUF_P (XFRAME (tem
)))
1204 tem
= FRAME_MINIBUF_WINDOW (XFRAME (tem
));
1206 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1212 /* If we're in a combination window, find its last child and
1213 recurse on that. Otherwise, we've found the window we want. */
1216 if (!NILP (XWINDOW (window
)->hchild
))
1217 window
= XWINDOW (window
)->hchild
;
1218 else if (!NILP (XWINDOW (window
)->vchild
))
1219 window
= XWINDOW (window
)->vchild
;
1221 while (tem
= XWINDOW (window
)->next
, !NILP (tem
))
1225 /* Which windows are acceptable?
1226 Exit the loop and accept this window if
1227 this isn't a minibuffer window,
1228 or we're accepting all minibuffer windows,
1229 or this is the active minibuffer and we are accepting that one, or
1230 we've come all the way around and we're back at the original window. */
1231 while (MINI_WINDOW_P (XWINDOW (window
))
1232 && ! EQ (minibuf
, Qt
)
1233 && ! EQ (minibuf
, window
)
1234 && ! EQ (window
, start_window
));
1239 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1240 "Select the ARG'th different window on this frame.\n\
1241 All windows on current frame are arranged in a cyclic order.\n\
1242 This command selects the window ARG steps away in that order.\n\
1243 A negative ARG moves in the opposite order. If the optional second\n\
1244 argument ALL_FRAMES is non-nil, cycle through all frames.")
1246 register Lisp_Object arg
, all_frames
;
1249 register Lisp_Object w
;
1251 CHECK_NUMBER (arg
, 0);
1252 w
= selected_window
;
1257 w
= Fnext_window (w
, Qnil
, all_frames
);
1262 w
= Fprevious_window (w
, Qnil
, all_frames
);
1269 /* Look at all windows, performing an operation specified by TYPE
1271 If FRAMES is Qt, look at all frames;
1272 Qnil, look at just the selected frame;
1273 Qvisible, look at visible frames;
1274 a frame, just look at windows on that frame.
1275 If MINI is non-zero, perform the operation on minibuffer windows too.
1281 GET_BUFFER_WINDOW
, /* Arg is buffer */
1282 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1283 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1284 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1286 UNSHOW_BUFFER
/* Arg is buffer */
1290 window_loop (type
, obj
, mini
, frames
)
1291 enum window_loop type
;
1292 register Lisp_Object obj
, frames
;
1295 register Lisp_Object w
;
1296 register Lisp_Object best_window
;
1297 register Lisp_Object next_window
;
1298 register Lisp_Object last_window
;
1300 Lisp_Object frame_arg
;
1303 /* If we're only looping through windows on a particular frame,
1304 frame points to that frame. If we're looping through windows
1305 on all frames, frame is 0. */
1306 if (FRAMEP (frames
))
1307 frame
= XFRAME (frames
);
1308 else if (NILP (frames
))
1309 frame
= selected_frame
;
1313 frame_arg
= Qlambda
;
1314 else if (XFASTINT (frames
) == 0)
1316 else if (EQ (frames
, Qvisible
))
1319 /* frame_arg is Qlambda to stick to one frame,
1320 Qvisible to consider all visible frames,
1323 /* Pick a window to start with. */
1327 w
= FRAME_SELECTED_WINDOW (frame
);
1329 w
= FRAME_SELECTED_WINDOW (selected_frame
);
1331 /* Figure out the last window we're going to mess with. Since
1332 Fnext_window, given the same options, is guaranteed to go in a
1333 ring, we can just use Fprevious_window to find the last one.
1335 We can't just wait until we hit the first window again, because
1336 it might be deleted. */
1338 last_window
= Fprevious_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1343 FRAME_PTR w_frame
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1345 /* Pick the next window now, since some operations will delete
1346 the current window. */
1347 next_window
= Fnext_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1349 /* Note that we do not pay attention here to whether
1350 the frame is visible, since Fnext_window skips non-visible frames
1351 if that is desired, under the control of frame_arg. */
1352 if (! MINI_WINDOW_P (XWINDOW (w
))
1353 || (mini
&& minibuf_level
> 0))
1356 case GET_BUFFER_WINDOW
:
1357 if (XBUFFER (XWINDOW (w
)->buffer
) == XBUFFER (obj
)
1358 /* Don't find any minibuffer window
1359 except the one that is currently in use. */
1360 && (MINI_WINDOW_P (XWINDOW (w
))
1361 ? EQ (w
, minibuf_window
) : 1))
1365 case GET_LRU_WINDOW
:
1366 /* t as arg means consider only full-width windows */
1367 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (XWINDOW (w
)))
1369 /* Ignore dedicated windows and minibuffers. */
1370 if (MINI_WINDOW_P (XWINDOW (w
))
1371 || !NILP (XWINDOW (w
)->dedicated
))
1373 if (NILP (best_window
)
1374 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1375 > XFASTINT (XWINDOW (w
)->use_time
)))
1379 case DELETE_OTHER_WINDOWS
:
1380 if (XWINDOW (w
) != XWINDOW (obj
))
1384 case DELETE_BUFFER_WINDOWS
:
1385 if (EQ (XWINDOW (w
)->buffer
, obj
))
1387 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1389 /* If this window is dedicated, and in a frame of its own,
1391 if (EQ (w
, FRAME_ROOT_WINDOW (f
))
1392 && !NILP (XWINDOW (w
)->dedicated
)
1393 && other_visible_frames (f
))
1395 /* Skip the other windows on this frame.
1396 There might be one, the minibuffer! */
1397 if (! EQ (w
, last_window
))
1398 while (f
== XFRAME (WINDOW_FRAME (XWINDOW (next_window
))))
1400 /* As we go, check for the end of the loop.
1401 We mustn't start going around a second time. */
1402 if (EQ (next_window
, last_window
))
1407 next_window
= Fnext_window (next_window
,
1411 /* Now we can safely delete the frame. */
1412 Fdelete_frame (WINDOW_FRAME (XWINDOW (w
)), Qnil
);
1415 /* If we're deleting the buffer displayed in the only window
1416 on the frame, find a new buffer to display there. */
1417 if (NILP (XWINDOW (w
)->parent
))
1419 Lisp_Object new_buffer
;
1420 new_buffer
= Fother_buffer (obj
, Qnil
);
1421 if (NILP (new_buffer
))
1423 = Fget_buffer_create (build_string ("*scratch*"));
1424 Fset_window_buffer (w
, new_buffer
);
1425 if (EQ (w
, selected_window
))
1426 Fset_buffer (XWINDOW (w
)->buffer
);
1433 case GET_LARGEST_WINDOW
:
1434 /* Ignore dedicated windows and minibuffers. */
1435 if (MINI_WINDOW_P (XWINDOW (w
))
1436 || !NILP (XWINDOW (w
)->dedicated
))
1439 struct window
*best_window_ptr
= XWINDOW (best_window
);
1440 struct window
*w_ptr
= XWINDOW (w
);
1441 if (NILP (best_window
)
1442 || (XFASTINT (w_ptr
->height
) * XFASTINT (w_ptr
->width
)
1443 > (XFASTINT (best_window_ptr
->height
)
1444 * XFASTINT (best_window_ptr
->width
))))
1450 if (EQ (XWINDOW (w
)->buffer
, obj
))
1452 /* Find another buffer to show in this window. */
1453 Lisp_Object another_buffer
;
1454 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1455 another_buffer
= Fother_buffer (obj
, Qnil
);
1456 if (NILP (another_buffer
))
1458 = Fget_buffer_create (build_string ("*scratch*"));
1459 /* If this window is dedicated, and in a frame of its own,
1461 if (EQ (w
, FRAME_ROOT_WINDOW (f
))
1462 && !NILP (XWINDOW (w
)->dedicated
)
1463 && other_visible_frames (f
))
1465 /* Skip the other windows on this frame.
1466 There might be one, the minibuffer! */
1467 if (! EQ (w
, last_window
))
1468 while (f
== XFRAME (WINDOW_FRAME (XWINDOW (next_window
))))
1470 /* As we go, check for the end of the loop.
1471 We mustn't start going around a second time. */
1472 if (EQ (next_window
, last_window
))
1477 next_window
= Fnext_window (next_window
,
1481 /* Now we can safely delete the frame. */
1482 Fdelete_frame (WINDOW_FRAME (XWINDOW (w
)), Qnil
);
1486 /* Otherwise show a different buffer in the window. */
1487 XWINDOW (w
)->dedicated
= Qnil
;
1488 Fset_window_buffer (w
, another_buffer
);
1489 if (EQ (w
, selected_window
))
1490 Fset_buffer (XWINDOW (w
)->buffer
);
1496 if (EQ (w
, last_window
))
1505 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1506 "Return the window least recently selected or used for display.\n\
1507 If optional argument FRAME is `visible', search all visible frames.\n\
1508 If FRAME is 0, search all visible and iconified frames.\n\
1509 If FRAME is t, search all frames.\n\
1510 If FRAME is nil, search only the selected frame.\n\
1511 If FRAME is a frame, search only that frame.")
1515 register Lisp_Object w
;
1516 /* First try for a window that is full-width */
1517 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1518 if (!NILP (w
) && !EQ (w
, selected_window
))
1520 /* If none of them, try the rest */
1521 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1524 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1525 "Return the largest window in area.\n\
1526 If optional argument FRAME is `visible', search all visible frames.\n\
1527 If FRAME is 0, search all visible and iconified frames.\n\
1528 If FRAME is t, search all frames.\n\
1529 If FRAME is nil, search only the selected frame.\n\
1530 If FRAME is a frame, search only that frame.")
1534 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1538 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1539 "Return a window currently displaying BUFFER, or nil if none.\n\
1540 If optional argument FRAME is `visible', search all visible frames.\n\
1541 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1542 If FRAME is t, search all frames.\n\
1543 If FRAME is nil, search only the selected frame.\n\
1544 If FRAME is a frame, search only that frame.")
1546 Lisp_Object buffer
, frame
;
1548 buffer
= Fget_buffer (buffer
);
1549 if (BUFFERP (buffer
))
1550 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1555 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1557 "Make WINDOW (or the selected window) fill its frame.\n\
1558 Only the frame WINDOW is on is affected.\n\
1559 This function tries to reduce display jumps\n\
1560 by keeping the text previously visible in WINDOW\n\
1561 in the same place on the frame. Doing this depends on\n\
1562 the value of (window-start WINDOW), so if calling this function\n\
1563 in a program gives strange scrolling, make sure the window-start\n\
1564 value is reasonable when this function is called.")
1573 window
= selected_window
;
1575 CHECK_LIVE_WINDOW (window
, 0);
1577 w
= XWINDOW (window
);
1579 startpos
= marker_position (w
->start
);
1580 top
= XFASTINT (w
->top
) - FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w
)));
1582 if (MINI_WINDOW_P (w
) && top
> 0)
1583 error ("Can't expand minibuffer to full frame");
1585 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1587 /* Try to minimize scrolling, by setting the window start to the point
1588 will cause the text at the old window start to be at the same place
1589 on the frame. But don't try to do this if the window start is
1590 outside the visible portion (as might happen when the display is
1591 not current, due to typeahead). */
1592 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
1593 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
1595 struct position pos
;
1596 struct buffer
*obuf
= current_buffer
;
1598 Fset_buffer (w
->buffer
);
1599 /* This computation used to temporarily move point, but that can
1600 have unwanted side effects due to text properties. */
1601 pos
= *vmotion (startpos
, -top
, w
);
1603 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
1604 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
1605 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
1607 /* We need to do this, so that the window-scroll-functions
1609 w
->optional_new_start
= Qt
;
1611 set_buffer_internal (obuf
);
1616 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1617 1, 2, "bDelete windows on (buffer): ",
1618 "Delete all windows showing BUFFER.\n\
1619 Optional second argument FRAME controls which frames are affected.\n\
1620 If nil or omitted, delete all windows showing BUFFER in any frame.\n\
1621 If t, delete only windows showing BUFFER in the selected frame.\n\
1622 If `visible', delete all windows showing BUFFER in any visible frame.\n\
1623 If a frame, delete only windows showing BUFFER in that frame.")
1625 Lisp_Object buffer
, frame
;
1627 /* FRAME uses t and nil to mean the opposite of what window_loop
1629 if (! FRAMEP (frame
))
1630 frame
= NILP (frame
) ? Qt
: Qnil
;
1634 buffer
= Fget_buffer (buffer
);
1635 CHECK_BUFFER (buffer
, 0);
1636 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1641 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1642 Sreplace_buffer_in_windows
,
1643 1, 1, "bReplace buffer in windows: ",
1644 "Replace BUFFER with some other buffer in all windows showing it.")
1650 buffer
= Fget_buffer (buffer
);
1651 CHECK_BUFFER (buffer
, 0);
1652 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1657 /* Replace BUFFER with some other buffer in all windows
1658 of all frames, even those on other keyboards. */
1661 replace_buffer_in_all_windows (buffer
)
1665 Lisp_Object tail
, frame
;
1667 /* A single call to window_loop won't do the job
1668 because it only considers frames on the current keyboard.
1669 So loop manually over frames, and handle each one. */
1670 FOR_EACH_FRAME (tail
, frame
)
1671 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
1673 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
1677 /* Set the height of WINDOW and all its inferiors. */
1679 /* The smallest acceptable dimensions for a window. Anything smaller
1680 might crash Emacs. */
1681 #define MIN_SAFE_WINDOW_WIDTH (2)
1682 #define MIN_SAFE_WINDOW_HEIGHT (2)
1684 /* Make sure that window_min_height and window_min_width are
1685 not too small; if they are, set them to safe minima. */
1688 check_min_window_sizes ()
1690 /* Smaller values might permit a crash. */
1691 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1692 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1693 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1694 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1697 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1698 minimum allowable size. */
1700 check_frame_size (frame
, rows
, cols
)
1704 /* For height, we have to see:
1705 whether the frame has a minibuffer,
1706 whether it wants a mode line, and
1707 whether it has a menu bar. */
1709 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1710 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1711 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1712 if (FRAME_MENU_BAR_LINES (frame
) > 0)
1713 min_height
+= FRAME_MENU_BAR_LINES (frame
);
1715 if (*rows
< min_height
)
1717 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
1718 *cols
= MIN_SAFE_WINDOW_WIDTH
;
1721 /* Normally the window is deleted if it gets too small.
1722 nodelete nonzero means do not do this.
1723 (The caller should check later and do so if appropriate) */
1726 set_window_height (window
, height
, nodelete
)
1731 register struct window
*w
= XWINDOW (window
);
1732 register struct window
*c
;
1733 int oheight
= XFASTINT (w
->height
);
1734 int top
, pos
, lastbot
, opos
, lastobot
;
1737 check_min_window_sizes ();
1740 && ! NILP (w
->parent
)
1741 && (MINI_WINDOW_P (w
)
1743 : height
< window_min_height
))
1745 delete_window (window
);
1749 XSETFASTINT (w
->last_modified
, 0);
1750 XSETFASTINT (w
->last_overlay_modified
, 0);
1751 windows_or_buffers_changed
++;
1752 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
1754 XSETFASTINT (w
->height
, height
);
1755 if (!NILP (w
->hchild
))
1757 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1759 XWINDOW (child
)->top
= w
->top
;
1760 set_window_height (child
, height
, nodelete
);
1763 else if (!NILP (w
->vchild
))
1765 lastbot
= top
= XFASTINT (w
->top
);
1767 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
1769 c
= XWINDOW (child
);
1771 opos
= lastobot
+ XFASTINT (c
->height
);
1773 XSETFASTINT (c
->top
, lastbot
);
1775 pos
= (((opos
* height
) << 1) + oheight
) / (oheight
<< 1);
1777 /* Avoid confusion: inhibit deletion of child if becomes too small */
1778 set_window_height (child
, pos
+ top
- lastbot
, 1);
1780 /* Now advance child to next window,
1781 and set lastbot if child was not just deleted. */
1782 lastbot
= pos
+ top
;
1785 /* Now delete any children that became too small. */
1787 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1789 set_window_height (child
, XINT (XWINDOW (child
)->height
), 0);
1794 /* Recursively set width of WINDOW and its inferiors. */
1797 set_window_width (window
, width
, nodelete
)
1802 register struct window
*w
= XWINDOW (window
);
1803 register struct window
*c
;
1804 int owidth
= XFASTINT (w
->width
);
1805 int left
, pos
, lastright
, opos
, lastoright
;
1808 if (!nodelete
&& width
< window_min_width
&& !NILP (w
->parent
))
1810 delete_window (window
);
1814 XSETFASTINT (w
->last_modified
, 0);
1815 XSETFASTINT (w
->last_overlay_modified
, 0);
1816 windows_or_buffers_changed
++;
1817 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
1819 XSETFASTINT (w
->width
, width
);
1820 if (!NILP (w
->vchild
))
1822 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1824 XWINDOW (child
)->left
= w
->left
;
1825 set_window_width (child
, width
, nodelete
);
1828 else if (!NILP (w
->hchild
))
1830 lastright
= left
= XFASTINT (w
->left
);
1832 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
1834 c
= XWINDOW (child
);
1836 opos
= lastoright
+ XFASTINT (c
->width
);
1838 XSETFASTINT (c
->left
, lastright
);
1840 pos
= (((opos
* width
) << 1) + owidth
) / (owidth
<< 1);
1842 /* Inhibit deletion for becoming too small */
1843 set_window_width (child
, pos
+ left
- lastright
, 1);
1845 /* Now advance child to next window,
1846 and set lastright if child was not just deleted. */
1847 lastright
= pos
+ left
, lastoright
= opos
;
1849 /* Delete children that became too small */
1851 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1853 set_window_width (child
, XINT (XWINDOW (child
)->width
), 0);
1858 int window_select_count
;
1861 Fset_window_buffer_unwind (obuf
)
1868 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
1869 "Make WINDOW display BUFFER as its contents.\n\
1870 BUFFER can be a buffer or buffer name.")
1872 register Lisp_Object window
, buffer
;
1874 register Lisp_Object tem
;
1875 register struct window
*w
= decode_window (window
);
1876 int count
= specpdl_ptr
- specpdl
;
1878 buffer
= Fget_buffer (buffer
);
1879 CHECK_BUFFER (buffer
, 1);
1881 if (NILP (XBUFFER (buffer
)->name
))
1882 error ("Attempt to display deleted buffer");
1886 error ("Window is deleted");
1887 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
1888 is first being set up. */
1890 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
1891 error ("Window is dedicated to `%s'",
1892 XSTRING (XBUFFER (tem
)->name
)->data
);
1899 if (EQ (window
, selected_window
))
1900 XBUFFER (w
->buffer
)->last_selected_window
= window
;
1901 if (INTEGERP (XBUFFER (buffer
)->display_count
))
1902 XSETINT (XBUFFER (buffer
)->display_count
,
1903 XINT (XBUFFER (buffer
)->display_count
) + 1);
1905 XSETFASTINT (w
->window_end_pos
, 0);
1906 w
->window_end_valid
= Qnil
;
1907 XSETFASTINT (w
->hscroll
, 0);
1908 set_marker_both (w
->pointm
, buffer
,
1909 BUF_PT (XBUFFER (buffer
)), BUF_PT_BYTE (XBUFFER (buffer
)));
1910 set_marker_restricted (w
->start
,
1911 make_number (XBUFFER (buffer
)->last_window_start
),
1913 w
->start_at_line_beg
= Qnil
;
1914 w
->force_start
= Qnil
;
1915 XSETFASTINT (w
->last_modified
, 0);
1916 XSETFASTINT (w
->last_overlay_modified
, 0);
1917 windows_or_buffers_changed
++;
1919 /* We must select BUFFER for running the window-scroll-functions.
1920 If WINDOW is selected, switch permanently.
1921 Otherwise, switch but go back to the ambient buffer afterward. */
1922 if (EQ (window
, selected_window
))
1923 Fset_buffer (buffer
);
1924 /* We can't check ! NILP (Vwindow_scroll_functions) here
1925 because that might itself be a local variable. */
1926 else if (window_initialized
)
1928 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
1929 Fset_buffer (buffer
);
1932 if (! NILP (Vwindow_scroll_functions
))
1933 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1934 Fmarker_position (w
->start
));
1936 if (! NILP (Vwindow_configuration_change_hook
)
1937 && ! NILP (Vrun_hooks
))
1938 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1940 unbind_to (count
, Qnil
);
1945 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
1946 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
1947 The main editor command loop selects the buffer of the selected window\n\
1948 before each command.")
1950 register Lisp_Object window
;
1952 register struct window
*w
;
1953 register struct window
*ow
= XWINDOW (selected_window
);
1955 CHECK_LIVE_WINDOW (window
, 0);
1957 w
= XWINDOW (window
);
1959 if (NILP (w
->buffer
))
1960 error ("Trying to select deleted window or non-leaf window");
1962 XSETFASTINT (w
->use_time
, ++window_select_count
);
1963 if (EQ (window
, selected_window
))
1966 set_marker_both (ow
->pointm
, ow
->buffer
,
1967 BUF_PT (XBUFFER (ow
->buffer
)),
1968 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
1970 selected_window
= window
;
1971 if (XFRAME (WINDOW_FRAME (w
)) != selected_frame
)
1973 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
1974 /* Use this rather than Fhandle_switch_frame
1975 so that FRAME_FOCUS_FRAME is moved appropriately as we
1976 move around in the state where a minibuffer in a separate
1978 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
1981 selected_frame
->selected_window
= window
;
1983 record_buffer (w
->buffer
);
1984 Fset_buffer (w
->buffer
);
1986 XBUFFER (w
->buffer
)->last_selected_window
= window
;
1988 /* Go to the point recorded in the window.
1989 This is important when the buffer is in more
1990 than one window. It also matters when
1991 redisplay_window has altered point after scrolling,
1992 because it makes the change only in the window. */
1994 register int new_point
= marker_position (w
->pointm
);
1995 if (new_point
< BEGV
)
1997 else if (new_point
> ZV
)
2003 windows_or_buffers_changed
++;
2007 /* Deiconify the frame containing the window WINDOW,
2008 unless it is the selected frame;
2011 The reason for the exception for the selected frame
2012 is that it seems better not to change the selected frames visibility
2013 merely because of displaying a different buffer in it.
2014 The deiconification is useful when a buffer gets shown in
2015 another frame that you were not using lately. */
2018 display_buffer_1 (window
)
2021 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
2022 FRAME_SAMPLE_VISIBILITY (f
);
2023 if (f
!= selected_frame
)
2025 if (FRAME_ICONIFIED_P (f
))
2026 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
2027 else if (FRAME_VISIBLE_P (f
))
2028 Fraise_frame (WINDOW_FRAME (XWINDOW (window
)));
2033 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2034 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2035 The value is actually t if the frame should be called with default frame\n\
2036 parameters, and a list of frame parameters if they were specified.\n\
2037 See `special-display-buffer-names', and `special-display-regexps'.")
2039 Lisp_Object buffer_name
;
2043 CHECK_STRING (buffer_name
, 1);
2045 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2049 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2053 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2055 Lisp_Object car
= XCAR (tem
);
2057 && fast_string_match (car
, buffer_name
) >= 0)
2059 else if (CONSP (car
)
2060 && STRINGP (XCAR (car
))
2061 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2067 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2068 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2069 See `same-window-buffer-names' and `same-window-regexps'.")
2071 Lisp_Object buffer_name
;
2075 CHECK_STRING (buffer_name
, 1);
2077 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2081 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2085 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2087 Lisp_Object car
= XCAR (tem
);
2089 && fast_string_match (car
, buffer_name
) >= 0)
2091 else if (CONSP (car
)
2092 && STRINGP (XCAR (car
))
2093 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2099 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 2,
2100 "BDisplay buffer: \nP", /* Use B so the default is (other-buffer). */
2101 "Make BUFFER appear in some window but don't select it.\n\
2102 BUFFER can be a buffer or a buffer name.\n\
2103 If BUFFER is shown already in some window, just use that one,\n\
2104 unless the window is the selected window and the optional second\n\
2105 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2106 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2107 Returns the window displaying BUFFER.\n\
2109 The variables `special-display-buffer-names', `special-display-regexps',\n\
2110 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2111 buffer names are handled.")
2112 (buffer
, not_this_window
)
2113 register Lisp_Object buffer
, not_this_window
;
2115 register Lisp_Object window
, tem
;
2117 buffer
= Fget_buffer (buffer
);
2118 CHECK_BUFFER (buffer
, 0);
2120 if (!NILP (Vdisplay_buffer_function
))
2121 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2123 if (NILP (not_this_window
)
2124 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2125 return display_buffer_1 (selected_window
);
2127 /* See if the user has specified this buffer should appear
2128 in the selected window. */
2129 if (NILP (not_this_window
))
2131 tem
= Fsame_window_p (XBUFFER (buffer
)->name
);
2134 Fswitch_to_buffer (buffer
, Qnil
);
2135 return display_buffer_1 (selected_window
);
2139 /* If pop_up_frames,
2140 look for a window showing BUFFER on any visible or iconified frame.
2141 Otherwise search only the current frame. */
2142 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2143 XSETFASTINT (tem
, 0);
2145 XSETFRAME (tem
, last_nonminibuf_frame
);
2146 window
= Fget_buffer_window (buffer
, tem
);
2148 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2150 return display_buffer_1 (window
);
2153 /* Certain buffer names get special handling. */
2154 if (!NILP (Vspecial_display_function
))
2156 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2158 return call1 (Vspecial_display_function
, buffer
);
2160 return call2 (Vspecial_display_function
, buffer
, tem
);
2163 /* If there are no frames open that have more than a minibuffer,
2164 we need to create a new frame. */
2165 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2167 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2168 Fset_window_buffer (window
, buffer
);
2169 return display_buffer_1 (window
);
2173 || FRAME_MINIBUF_ONLY_P (selected_frame
)
2174 /* If the current frame is a special display frame,
2175 don't try to reuse its windows. */
2176 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->dedicated
)
2182 if (FRAME_MINIBUF_ONLY_P (selected_frame
))
2183 XSETFRAME (frames
, last_nonminibuf_frame
);
2184 /* Don't try to create a window if would get an error */
2185 if (split_height_threshold
< window_min_height
<< 1)
2186 split_height_threshold
= window_min_height
<< 1;
2188 /* Note that both Fget_largest_window and Fget_lru_window
2189 ignore minibuffers and dedicated windows.
2190 This means they can return nil. */
2192 /* If the frame we would try to split cannot be split,
2193 try other frames. */
2194 if (FRAME_NO_SPLIT_P (NILP (frames
) ? selected_frame
2195 : last_nonminibuf_frame
))
2197 /* Try visible frames first. */
2198 window
= Fget_largest_window (Qvisible
);
2199 /* If that didn't work, try iconified frames. */
2201 window
= Fget_largest_window (make_number (0));
2203 window
= Fget_largest_window (Qt
);
2206 window
= Fget_largest_window (frames
);
2208 /* If we got a tall enough full-width window that can be split,
2211 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2212 && window_height (window
) >= split_height_threshold
2213 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2214 window
= Fsplit_window (window
, Qnil
, Qnil
);
2217 Lisp_Object upper
, lower
, other
;
2219 window
= Fget_lru_window (frames
);
2220 /* If the LRU window is selected, and big enough,
2221 and can be split, split it. */
2223 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2224 && (EQ (window
, selected_window
)
2225 || EQ (XWINDOW (window
)->parent
, Qnil
))
2226 && window_height (window
) >= window_min_height
<< 1)
2227 window
= Fsplit_window (window
, Qnil
, Qnil
);
2228 /* If Fget_lru_window returned nil, try other approaches. */
2230 /* Try visible frames first. */
2232 window
= Fget_buffer_window (buffer
, Qvisible
);
2234 window
= Fget_largest_window (Qvisible
);
2235 /* If that didn't work, try iconified frames. */
2237 window
= Fget_buffer_window (buffer
, make_number (0));
2239 window
= Fget_largest_window (make_number (0));
2240 /* Try invisible frames. */
2242 window
= Fget_buffer_window (buffer
, Qt
);
2244 window
= Fget_largest_window (Qt
);
2245 /* As a last resort, make a new frame. */
2247 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2248 /* If window appears above or below another,
2249 even out their heights. */
2250 other
= upper
= lower
= Qnil
;
2251 if (!NILP (XWINDOW (window
)->prev
))
2252 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
2253 if (!NILP (XWINDOW (window
)->next
))
2254 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
2256 /* Check that OTHER and WINDOW are vertically arrayed. */
2257 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
2258 && (XFASTINT (XWINDOW (other
)->height
)
2259 > XFASTINT (XWINDOW (window
)->height
)))
2261 int total
= (XFASTINT (XWINDOW (other
)->height
)
2262 + XFASTINT (XWINDOW (window
)->height
));
2263 Lisp_Object old_selected_window
;
2264 old_selected_window
= selected_window
;
2266 selected_window
= upper
;
2267 change_window_height ((total
/ 2
2268 - XFASTINT (XWINDOW (upper
)->height
)),
2270 selected_window
= old_selected_window
;
2275 window
= Fget_lru_window (Qnil
);
2277 Fset_window_buffer (window
, buffer
);
2278 return display_buffer_1 (window
);
2282 temp_output_buffer_show (buf
)
2283 register Lisp_Object buf
;
2285 register struct buffer
*old
= current_buffer
;
2286 register Lisp_Object window
;
2287 register struct window
*w
;
2289 XBUFFER (buf
)->directory
= current_buffer
->directory
;
2292 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
2296 XBUFFER (buf
)->clip_changed
= 1;
2297 set_buffer_internal (old
);
2299 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
2300 call1 (Vtemp_buffer_show_function
, buf
);
2303 window
= Fdisplay_buffer (buf
, Qnil
);
2305 if (XFRAME (XWINDOW (window
)->frame
) != selected_frame
)
2306 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
2307 Vminibuf_scroll_window
= window
;
2308 w
= XWINDOW (window
);
2309 XSETFASTINT (w
->hscroll
, 0);
2310 set_marker_restricted_both (w
->start
, buf
, 1, 1);
2311 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
2313 /* Run temp-buffer-show-hook, with the chosen window selected. */
2314 if (!NILP (Vrun_hooks
))
2317 tem
= Fboundp (Qtemp_buffer_show_hook
);
2320 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
2323 int count
= specpdl_ptr
- specpdl
;
2325 /* Select the window that was chosen, for running the hook. */
2326 record_unwind_protect (Fset_window_configuration
,
2327 Fcurrent_window_configuration (Qnil
));
2329 Fselect_window (window
);
2330 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
2331 unbind_to (count
, Qnil
);
2339 make_dummy_parent (window
)
2343 register struct window
*o
, *p
;
2344 register struct Lisp_Vector
*vec
;
2347 o
= XWINDOW (window
);
2348 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
2349 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
2350 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
2351 vec
->size
= VECSIZE (struct window
);
2352 p
= (struct window
*)vec
;
2353 XSETWINDOW (new, p
);
2355 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
2357 /* Put new into window structure in place of window */
2358 replace_window (window
, new);
2371 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
2372 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
2373 WINDOW defaults to selected one and SIZE to half its size.\n\
2374 If optional third arg HORFLAG is non-nil, split side by side\n\
2375 and put SIZE columns in the first of the pair.")
2376 (window
, size
, horflag
)
2377 Lisp_Object window
, size
, horflag
;
2379 register Lisp_Object
new;
2380 register struct window
*o
, *p
;
2382 register int size_int
;
2385 window
= selected_window
;
2387 CHECK_LIVE_WINDOW (window
, 0);
2389 o
= XWINDOW (window
);
2390 fo
= XFRAME (WINDOW_FRAME (o
));
2394 if (!NILP (horflag
))
2395 /* Calculate the size of the left-hand window, by dividing
2396 the usable space in columns by two. */
2397 size_int
= XFASTINT (o
->width
) >> 1;
2399 size_int
= XFASTINT (o
->height
) >> 1;
2403 CHECK_NUMBER (size
, 1);
2404 size_int
= XINT (size
);
2407 if (MINI_WINDOW_P (o
))
2408 error ("Attempt to split minibuffer window");
2410 check_min_window_sizes ();
2414 if (size_int
< window_min_height
)
2415 error ("Window height %d too small (after splitting)", size_int
);
2416 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
2417 error ("Window height %d too small (after splitting)",
2418 XFASTINT (o
->height
) - size_int
);
2419 if (NILP (o
->parent
)
2420 || NILP (XWINDOW (o
->parent
)->vchild
))
2422 make_dummy_parent (window
);
2424 XWINDOW (new)->vchild
= window
;
2429 if (size_int
< window_min_width
)
2430 error ("Window width %d too small (after splitting)", size_int
);
2432 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
2433 error ("Window width %d too small (after splitting)",
2434 XFASTINT (o
->width
) - size_int
);
2435 if (NILP (o
->parent
)
2436 || NILP (XWINDOW (o
->parent
)->hchild
))
2438 make_dummy_parent (window
);
2440 XWINDOW (new)->hchild
= window
;
2444 /* Now we know that window's parent is a vertical combination
2445 if we are dividing vertically, or a horizontal combination
2446 if we are making side-by-side windows */
2448 windows_or_buffers_changed
++;
2449 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
2450 new = make_window ();
2453 p
->frame
= o
->frame
;
2455 if (!NILP (p
->next
))
2456 XWINDOW (p
->next
)->prev
= new;
2459 p
->parent
= o
->parent
;
2462 /* Apportion the available frame space among the two new windows */
2464 if (!NILP (horflag
))
2466 p
->height
= o
->height
;
2468 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
2469 XSETFASTINT (o
->width
, size_int
);
2470 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
2475 p
->width
= o
->width
;
2476 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
2477 XSETFASTINT (o
->height
, size_int
);
2478 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
2481 Fset_window_buffer (new, o
->buffer
);
2486 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
2487 "Make current window ARG lines bigger.\n\
2488 From program, optional second arg non-nil means grow sideways ARG columns.")
2490 register Lisp_Object arg
, side
;
2492 CHECK_NUMBER (arg
, 0);
2493 change_window_height (XINT (arg
), !NILP (side
));
2495 if (! NILP (Vwindow_configuration_change_hook
))
2496 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2501 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
2502 "Make current window ARG lines smaller.\n\
2503 From program, optional second arg non-nil means shrink sideways arg columns.")
2505 register Lisp_Object arg
, side
;
2507 CHECK_NUMBER (arg
, 0);
2508 change_window_height (-XINT (arg
), !NILP (side
));
2510 if (! NILP (Vwindow_configuration_change_hook
))
2511 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2517 window_height (window
)
2520 register struct window
*p
= XWINDOW (window
);
2521 return XFASTINT (p
->height
);
2525 window_width (window
)
2528 register struct window
*p
= XWINDOW (window
);
2529 return XFASTINT (p
->width
);
2532 #define MINSIZE(w) \
2534 ? window_min_width \
2535 : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height))
2538 *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top))
2540 #define CURSIZE(w) \
2541 *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height))
2543 /* Unlike set_window_height, this function
2544 also changes the heights of the siblings so as to
2545 keep everything consistent. */
2548 change_window_height (delta
, widthflag
)
2552 register Lisp_Object parent
;
2554 register struct window
*p
;
2556 int (*sizefun
) P_ ((Lisp_Object
))
2557 = widthflag
? window_width
: window_height
;
2558 register void (*setsizefun
) P_ ((Lisp_Object
, int, int))
2559 = (widthflag
? set_window_width
: set_window_height
);
2561 Lisp_Object next
, prev
;
2563 check_min_window_sizes ();
2565 window
= selected_window
;
2568 p
= XWINDOW (window
);
2573 error ("No other window to side of this one");
2576 if (widthflag
? !NILP (XWINDOW (parent
)->hchild
)
2577 : !NILP (XWINDOW (parent
)->vchild
))
2582 sizep
= &CURSIZE (window
);
2585 register int maxdelta
;
2587 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - *sizep
2588 : !NILP (p
->next
) ? (*sizefun
) (p
->next
) - MINSIZE (p
->next
)
2589 : !NILP (p
->prev
) ? (*sizefun
) (p
->prev
) - MINSIZE (p
->prev
)
2590 /* This is a frame with only one window, a minibuffer-only
2591 or a minibufferless frame. */
2594 if (delta
> maxdelta
)
2595 /* This case traps trying to make the minibuffer
2596 the full frame, or make the only window aside from the
2597 minibuffer the full frame. */
2601 if (*sizep
+ delta
< MINSIZE (window
))
2603 delete_window (window
);
2610 /* Find the total we can get from other siblings. */
2612 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
2613 maximum
+= (*sizefun
) (next
) - MINSIZE (next
);
2614 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
2615 maximum
+= (*sizefun
) (prev
) - MINSIZE (prev
);
2617 /* If we can get it all from them, do so. */
2618 if (delta
<= maximum
)
2620 Lisp_Object first_unaffected
;
2621 Lisp_Object first_affected
;
2625 first_affected
= window
;
2626 /* Look at one sibling at a time,
2627 moving away from this window in both directions alternately,
2628 and take as much as we can get without deleting that sibling. */
2635 int this_one
= (*sizefun
) (next
) - MINSIZE (next
);
2636 if (this_one
> delta
)
2639 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
2640 (*setsizefun
) (window
, *sizep
+ this_one
, 0);
2643 next
= XWINDOW (next
)->next
;
2649 int this_one
= (*sizefun
) (prev
) - MINSIZE (prev
);
2650 if (this_one
> delta
)
2653 first_affected
= prev
;
2655 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
2656 (*setsizefun
) (window
, *sizep
+ this_one
, 0);
2659 prev
= XWINDOW (prev
)->prev
;
2663 /* Now recalculate the edge positions of all the windows affected,
2664 based on the new sizes. */
2665 first_unaffected
= next
;
2666 prev
= first_affected
;
2667 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
2668 prev
= next
, next
= XWINDOW (next
)->next
)
2670 CURBEG (next
) = CURBEG (prev
) + (*sizefun
) (prev
);
2671 /* This does not change size of NEXT,
2672 but it propagates the new top edge to its children */
2673 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
2678 register int delta1
;
2679 register int opht
= (*sizefun
) (parent
);
2681 /* If trying to grow this window to or beyond size of the parent,
2682 make delta1 so big that, on shrinking back down,
2683 all the siblings end up with less than one line and are deleted. */
2684 if (opht
<= *sizep
+ delta
)
2685 delta1
= opht
* opht
* 2;
2686 /* Otherwise, make delta1 just right so that if we add delta1
2687 lines to this window and to the parent, and then shrink
2688 the parent back to its original size, the new proportional
2689 size of this window will increase by delta. */
2691 delta1
= (delta
* opht
* 100) / ((opht
- *sizep
- delta
) * 100);
2693 /* Add delta1 lines or columns to this window, and to the parent,
2694 keeping things consistent while not affecting siblings. */
2695 CURSIZE (parent
) = opht
+ delta1
;
2696 (*setsizefun
) (window
, *sizep
+ delta1
, 0);
2698 /* Squeeze out delta1 lines or columns from our parent,
2699 shriking this window and siblings proportionately.
2700 This brings parent back to correct size.
2701 Delta1 was calculated so this makes this window the desired size,
2702 taking it all out of the siblings. */
2703 (*setsizefun
) (parent
, opht
, 0);
2706 XSETFASTINT (p
->last_modified
, 0);
2707 XSETFASTINT (p
->last_overlay_modified
, 0);
2714 /* Return number of lines of text (not counting mode line) in W. */
2717 window_internal_height (w
)
2720 int ht
= XFASTINT (w
->height
);
2722 if (MINI_WINDOW_P (w
))
2725 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
2726 || !NILP (w
->next
) || !NILP (w
->prev
)
2727 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
2734 /* Return the number of columns in W.
2735 Don't count columns occupied by scroll bars or the vertical bar
2736 separating W from the sibling to its right. */
2738 window_internal_width (w
)
2741 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
2742 int width
= XINT (w
->width
);
2744 /* Scroll bars occupy a few columns. */
2745 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2746 return width
- FRAME_SCROLL_BAR_COLS (f
);
2748 /* The column of `|' characters separating side-by-side windows
2749 occupies one column only. */
2750 if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
2757 /* Scroll contents of window WINDOW up N lines.
2758 If WHOLE is nonzero, it means scroll N screenfuls instead. */
2761 window_scroll (window
, n
, whole
, noerror
)
2767 register struct window
*w
= XWINDOW (window
);
2768 register int opoint
= PT
;
2769 register int opoint_byte
= PT
;
2770 register int pos
, pos_byte
;
2771 register int ht
= window_internal_height (w
);
2772 register Lisp_Object tem
;
2774 Lisp_Object bolp
, nmoved
;
2776 struct position posit
;
2779 startpos
= marker_position (w
->start
);
2781 posit
= *compute_motion (startpos
, 0, 0, 0,
2783 window_internal_width (w
), XINT (w
->hscroll
),
2785 original_vpos
= posit
.vpos
;
2787 XSETFASTINT (tem
, PT
);
2788 tem
= Fpos_visible_in_window_p (tem
, window
);
2792 Fvertical_motion (make_number (- (ht
/ 2)), window
);
2797 lose
= n
< 0 && PT
== BEGV
;
2798 Fvertical_motion (make_number (n
), window
);
2802 SET_PT_BOTH (opoint
, opoint_byte
);
2809 Fsignal (Qbeginning_of_buffer
, Qnil
);
2814 int this_scroll_margin
= scroll_margin
;
2816 /* Don't use a scroll margin that is negative or too large. */
2817 if (this_scroll_margin
< 0)
2818 this_scroll_margin
= 0;
2820 if (XINT (w
->height
) < 4 * scroll_margin
)
2821 this_scroll_margin
= XINT (w
->height
) / 4;
2823 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
2824 w
->start_at_line_beg
= bolp
;
2825 w
->update_mode_line
= Qt
;
2826 XSETFASTINT (w
->last_modified
, 0);
2827 XSETFASTINT (w
->last_overlay_modified
, 0);
2828 /* Set force_start so that redisplay_window will run
2829 the window-scroll-functions. */
2830 w
->force_start
= Qt
;
2832 if (whole
&& scroll_preserve_screen_position
)
2834 SET_PT_BOTH (pos
, pos_byte
);
2835 Fvertical_motion (make_number (original_vpos
), window
);
2837 /* If we scrolled forward, put point enough lines down
2838 that it is outside the scroll margin. */
2843 if (this_scroll_margin
> 0)
2845 SET_PT_BOTH (pos
, pos_byte
);
2846 Fvertical_motion (make_number (this_scroll_margin
), window
);
2852 if (top_margin
<= opoint
)
2853 SET_PT_BOTH (opoint
, opoint_byte
);
2854 else if (scroll_preserve_screen_position
)
2856 SET_PT_BOTH (pos
, pos_byte
);
2857 Fvertical_motion (make_number (original_vpos
), window
);
2860 SET_PT (top_margin
);
2866 /* If we scrolled backward, put point near the end of the window
2867 but not within the scroll margin. */
2868 SET_PT_BOTH (pos
, pos_byte
);
2869 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
2870 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
2873 bottom_margin
= PT
+ 1;
2875 if (bottom_margin
> opoint
)
2876 SET_PT_BOTH (opoint
, opoint_byte
);
2879 if (scroll_preserve_screen_position
)
2881 SET_PT_BOTH (pos
, pos_byte
);
2882 Fvertical_motion (make_number (original_vpos
), window
);
2885 Fvertical_motion (make_number (-1), window
);
2894 Fsignal (Qend_of_buffer
, Qnil
);
2898 /* This is the guts of Fscroll_up and Fscroll_down. */
2901 scroll_command (n
, direction
)
2902 register Lisp_Object n
;
2905 register int defalt
;
2906 int count
= specpdl_ptr
- specpdl
;
2908 /* If selected window's buffer isn't current, make it current for the moment.
2909 But don't screw up if window_scroll gets an error. */
2910 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
2912 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2913 Fset_buffer (XWINDOW (selected_window
)->buffer
);
2916 defalt
= (window_internal_height (XWINDOW (selected_window
))
2917 - next_screen_context_lines
);
2918 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
2921 window_scroll (selected_window
, defalt
, 1, 0);
2922 else if (EQ (n
, Qminus
))
2923 window_scroll (selected_window
, - defalt
, 1, 0);
2926 n
= Fprefix_numeric_value (n
);
2927 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
2930 unbind_to (count
, Qnil
);
2933 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
2934 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
2935 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2936 Negative ARG means scroll downward.\n\
2937 When calling from a program, supply a number as argument or nil.")
2941 scroll_command (arg
, 1);
2945 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
2946 "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\
2947 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2948 Negative ARG means scroll upward.\n\
2949 When calling from a program, supply a number as argument or nil.")
2953 scroll_command (arg
, -1);
2957 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
2958 "Return the other window for \"other window scroll\" commands.\n\
2959 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
2960 specifies the window.\n\
2961 If `other-window-scroll-buffer' is non-nil, a window\n\
2962 showing that buffer is used.")
2967 if (MINI_WINDOW_P (XWINDOW (selected_window
))
2968 && !NILP (Vminibuf_scroll_window
))
2969 window
= Vminibuf_scroll_window
;
2970 /* If buffer is specified, scroll that buffer. */
2971 else if (!NILP (Vother_window_scroll_buffer
))
2973 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
2975 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
);
2979 /* Nothing specified; look for a neighboring window on the same
2981 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
2983 if (EQ (window
, selected_window
))
2984 /* That didn't get us anywhere; look for a window on another
2987 window
= Fnext_window (window
, Qnil
, Qt
);
2988 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
2989 && ! EQ (window
, selected_window
));
2992 CHECK_LIVE_WINDOW (window
, 0);
2994 if (EQ (window
, selected_window
))
2995 error ("There is no other window");
3000 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
3001 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
3002 The next window is the one below the current one; or the one at the top\n\
3003 if the current one is at the bottom. Negative ARG means scroll downward.\n\
3004 When calling from a program, supply a number as argument or nil.\n\
3006 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
3007 specifies the window to scroll.\n\
3008 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
3009 showing that buffer, popping the buffer up if necessary.")
3011 register Lisp_Object arg
;
3013 register Lisp_Object window
;
3014 register int defalt
;
3015 register struct window
*w
;
3016 register int count
= specpdl_ptr
- specpdl
;
3018 window
= Fother_window_for_scrolling ();
3020 w
= XWINDOW (window
);
3021 defalt
= window_internal_height (w
) - next_screen_context_lines
;
3022 if (defalt
< 1) defalt
= 1;
3024 /* Don't screw up if window_scroll gets an error. */
3025 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
3027 Fset_buffer (w
->buffer
);
3028 SET_PT (marker_position (w
->pointm
));
3031 window_scroll (window
, defalt
, 1, 1);
3032 else if (EQ (arg
, Qminus
))
3033 window_scroll (window
, -defalt
, 1, 1);
3038 CHECK_NUMBER (arg
, 0);
3039 window_scroll (window
, XINT (arg
), 0, 1);
3042 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
3043 unbind_to (count
, Qnil
);
3048 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
3049 "Scroll selected window display ARG columns left.\n\
3050 Default for ARG is window width minus 2.")
3052 register Lisp_Object arg
;
3056 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
3058 arg
= Fprefix_numeric_value (arg
);
3061 Fset_window_hscroll (selected_window
,
3062 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
3066 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
3067 "Scroll selected window display ARG columns right.\n\
3068 Default for ARG is window width minus 2.")
3070 register Lisp_Object arg
;
3073 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
3075 arg
= Fprefix_numeric_value (arg
);
3078 Fset_window_hscroll (selected_window
,
3079 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
3083 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
3084 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
3085 The desired position of point is always relative to the current window.\n\
3086 Just C-u as prefix means put point in the center of the window.\n\
3087 If ARG is omitted or nil, erases the entire frame and then\n\
3088 redraws with point in the center of the current window.")
3090 register Lisp_Object arg
;
3092 register struct window
*w
= XWINDOW (selected_window
);
3093 register int ht
= window_internal_height (w
);
3094 struct position pos
;
3098 extern int frame_garbaged
;
3100 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
3101 XSETFASTINT (arg
, ht
/ 2);
3103 else if (CONSP (arg
)) /* Just C-u. */
3105 XSETFASTINT (arg
, ht
/ 2);
3109 arg
= Fprefix_numeric_value (arg
);
3110 CHECK_NUMBER (arg
, 0);
3114 XSETINT (arg
, XINT (arg
) + ht
);
3116 pos
= *vmotion (PT
, - XINT (arg
), w
);
3118 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
3119 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
3120 || FETCH_BYTE (pos
.bytepos
- 1) == '\n')
3122 w
->force_start
= Qt
;
3127 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
3129 "Position point relative to window.\n\
3130 With no argument, position point at center of window.\n\
3131 An argument specifies frame line; zero means top of window,\n\
3132 negative means relative to bottom of window.")
3134 register Lisp_Object arg
;
3136 register struct window
*w
= XWINDOW (selected_window
);
3137 register int height
= window_internal_height (w
);
3142 XSETFASTINT (arg
, height
/ 2);
3145 arg
= Fprefix_numeric_value (arg
);
3147 XSETINT (arg
, XINT (arg
) + height
);
3150 start
= marker_position (w
->start
);
3151 XSETWINDOW (window
, w
);
3152 if (start
< BEGV
|| start
> ZV
)
3154 Fvertical_motion (make_number (- (height
/ 2)), window
);
3155 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
3156 w
->start_at_line_beg
= Fbolp ();
3157 w
->force_start
= Qt
;
3160 Fgoto_char (w
->start
);
3162 return Fvertical_motion (arg
, window
);
3165 struct save_window_data
3167 EMACS_INT size_from_Lisp_Vector_struct
;
3168 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
3169 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
3170 Lisp_Object selected_frame
;
3171 Lisp_Object current_window
;
3172 Lisp_Object current_buffer
;
3173 Lisp_Object minibuf_scroll_window
;
3174 Lisp_Object root_window
;
3175 Lisp_Object focus_frame
;
3176 /* Record the values of window-min-width and window-min-height
3177 so that window sizes remain consistent with them. */
3178 Lisp_Object min_width
, min_height
;
3179 /* A vector, interpreted as a struct saved_window */
3180 Lisp_Object saved_windows
;
3183 /* This is saved as a Lisp_Vector */
3186 /* these first two must agree with struct Lisp_Vector in lisp.h */
3187 EMACS_INT size_from_Lisp_Vector_struct
;
3188 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
3191 Lisp_Object buffer
, start
, pointm
, mark
;
3192 Lisp_Object left
, top
, width
, height
, hscroll
;
3193 Lisp_Object parent
, prev
;
3194 Lisp_Object start_at_line_beg
;
3195 Lisp_Object display_table
;
3197 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
3199 #define SAVED_WINDOW_N(swv,n) \
3200 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
3202 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
3203 "T if OBJECT is a window-configuration object.")
3207 if (WINDOW_CONFIGURATIONP (object
))
3213 DEFUN ("set-window-configuration", Fset_window_configuration
,
3214 Sset_window_configuration
, 1, 1, 0,
3215 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
3216 CONFIGURATION must be a value previously returned\n\
3217 by `current-window-configuration' (which see).")
3219 Lisp_Object configuration
;
3221 register struct save_window_data
*data
;
3222 struct Lisp_Vector
*saved_windows
;
3223 Lisp_Object new_current_buffer
;
3228 while (!WINDOW_CONFIGURATIONP (configuration
))
3230 configuration
= wrong_type_argument (intern ("window-configuration-p"),
3234 data
= (struct save_window_data
*) XVECTOR (configuration
);
3235 saved_windows
= XVECTOR (data
->saved_windows
);
3237 new_current_buffer
= data
->current_buffer
;
3238 if (NILP (XBUFFER (new_current_buffer
)->name
))
3239 new_current_buffer
= Qnil
;
3242 if (XBUFFER (new_current_buffer
) == current_buffer
)
3246 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
3249 /* If f is a dead frame, don't bother rebuilding its window tree.
3250 However, there is other stuff we should still try to do below. */
3251 if (FRAME_LIVE_P (f
))
3253 register struct window
*w
;
3254 register struct saved_window
*p
;
3257 /* If the frame has been resized since this window configuration was
3258 made, we change the frame to the size specified in the
3259 configuration, restore the configuration, and then resize it
3260 back. We keep track of the prevailing height in these variables. */
3261 int previous_frame_height
= FRAME_HEIGHT (f
);
3262 int previous_frame_width
= FRAME_WIDTH (f
);
3263 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
3265 /* The mouse highlighting code could get screwed up
3266 if it runs during this. */
3269 if (XFASTINT (data
->frame_height
) != previous_frame_height
3270 || XFASTINT (data
->frame_width
) != previous_frame_width
)
3271 change_frame_size (f
, data
->frame_height
, data
->frame_width
, 0, 0);
3272 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
3273 if (XFASTINT (data
->frame_menu_bar_lines
)
3274 != previous_frame_menu_bar_lines
)
3275 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, 0);
3278 windows_or_buffers_changed
++;
3279 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3281 /* Temporarily avoid any problems with windows that are smaller
3282 than they are supposed to be. */
3283 window_min_height
= 1;
3284 window_min_width
= 1;
3287 Mark all windows now on frame as "deleted".
3288 Restoring the new configuration "undeletes" any that are in it.
3290 Save their current buffers in their height fields, since we may
3291 need it later, if a buffer saved in the configuration is now
3293 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
3295 for (k
= 0; k
< saved_windows
->size
; k
++)
3297 p
= SAVED_WINDOW_N (saved_windows
, k
);
3298 w
= XWINDOW (p
->window
);
3301 if (!NILP (p
->parent
))
3302 w
->parent
= SAVED_WINDOW_N (saved_windows
,
3303 XFASTINT (p
->parent
))->window
;
3307 if (!NILP (p
->prev
))
3309 w
->prev
= SAVED_WINDOW_N (saved_windows
,
3310 XFASTINT (p
->prev
))->window
;
3311 XWINDOW (w
->prev
)->next
= p
->window
;
3316 if (!NILP (w
->parent
))
3318 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
3320 XWINDOW (w
->parent
)->vchild
= p
->window
;
3321 XWINDOW (w
->parent
)->hchild
= Qnil
;
3325 XWINDOW (w
->parent
)->hchild
= p
->window
;
3326 XWINDOW (w
->parent
)->vchild
= Qnil
;
3331 /* If we squirreled away the buffer in the window's height,
3333 if (BUFFERP (w
->height
))
3334 w
->buffer
= w
->height
;
3337 w
->width
= p
->width
;
3338 w
->height
= p
->height
;
3339 w
->hscroll
= p
->hscroll
;
3340 w
->display_table
= p
->display_table
;
3341 XSETFASTINT (w
->last_modified
, 0);
3342 XSETFASTINT (w
->last_overlay_modified
, 0);
3344 /* Reinstall the saved buffer and pointers into it. */
3345 if (NILP (p
->buffer
))
3346 w
->buffer
= p
->buffer
;
3349 if (!NILP (XBUFFER (p
->buffer
)->name
))
3350 /* If saved buffer is alive, install it. */
3352 w
->buffer
= p
->buffer
;
3353 w
->start_at_line_beg
= p
->start_at_line_beg
;
3354 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
3355 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
3356 Fset_marker (XBUFFER (w
->buffer
)->mark
,
3357 p
->mark
, w
->buffer
);
3359 /* As documented in Fcurrent_window_configuration, don't
3360 save the location of point in the buffer which was current
3361 when the window configuration was recorded. */
3362 if (!EQ (p
->buffer
, new_current_buffer
)
3363 && XBUFFER (p
->buffer
) == current_buffer
)
3364 Fgoto_char (w
->pointm
);
3366 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
3367 /* Else unless window has a live buffer, get one. */
3369 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
3370 /* This will set the markers to beginning of visible
3372 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
3373 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
3374 w
->start_at_line_beg
= Qt
;
3377 /* Keeping window's old buffer; make sure the markers
3380 /* Set window markers at start of visible range. */
3381 if (XMARKER (w
->start
)->buffer
== 0)
3382 set_marker_restricted (w
->start
, make_number (0),
3384 if (XMARKER (w
->pointm
)->buffer
== 0)
3385 set_marker_restricted_both (w
->pointm
, w
->buffer
,
3386 BUF_PT (XBUFFER (w
->buffer
)),
3387 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
3388 w
->start_at_line_beg
= Qt
;
3393 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
3394 Fselect_window (data
->current_window
);
3395 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
3398 if (NILP (data
->focus_frame
)
3399 || (FRAMEP (data
->focus_frame
)
3400 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
3401 Fredirect_frame_focus (frame
, data
->focus_frame
);
3403 #if 0 /* I don't understand why this is needed, and it causes problems
3404 when the frame's old selected window has been deleted. */
3405 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
3406 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
3410 /* Set the screen height to the value it had before this function. */
3411 if (previous_frame_height
!= FRAME_HEIGHT (f
)
3412 || previous_frame_width
!= FRAME_WIDTH (f
))
3413 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
3415 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
3416 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
3417 x_set_menu_bar_lines (f
, previous_frame_menu_bar_lines
, 0);
3423 /* Restore the minimum heights recorded in the configuration. */
3424 window_min_height
= XINT (data
->min_height
);
3425 window_min_width
= XINT (data
->min_width
);
3427 /* Fselect_window will have made f the selected frame, so we
3428 reselect the proper frame here. Fhandle_switch_frame will change the
3429 selected window too, but that doesn't make the call to
3430 Fselect_window above totally superfluous; it still sets f's
3432 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
3433 do_switch_frame (data
->selected_frame
, Qnil
, 0);
3435 if (!NILP (new_current_buffer
))
3437 Fset_buffer (new_current_buffer
);
3439 /* If the buffer that is current now is the same
3440 that was current before setting the window configuration,
3441 don't alter its PT. */
3446 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
3448 if (! NILP (Vwindow_configuration_change_hook
)
3449 && ! NILP (Vrun_hooks
))
3450 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3455 /* Mark all windows now on frame as deleted
3456 by setting their buffers to nil. */
3459 delete_all_subwindows (w
)
3460 register struct window
*w
;
3462 if (!NILP (w
->next
))
3463 delete_all_subwindows (XWINDOW (w
->next
));
3464 if (!NILP (w
->vchild
))
3465 delete_all_subwindows (XWINDOW (w
->vchild
));
3466 if (!NILP (w
->hchild
))
3467 delete_all_subwindows (XWINDOW (w
->hchild
));
3469 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
3471 if (!NILP (w
->buffer
))
3474 /* We set all three of these fields to nil, to make sure that we can
3475 distinguish this dead window from any live window. Live leaf
3476 windows will have buffer set, and combination windows will have
3477 vchild or hchild set. */
3484 count_windows (window
)
3485 register struct window
*window
;
3487 register int count
= 1;
3488 if (!NILP (window
->next
))
3489 count
+= count_windows (XWINDOW (window
->next
));
3490 if (!NILP (window
->vchild
))
3491 count
+= count_windows (XWINDOW (window
->vchild
));
3492 if (!NILP (window
->hchild
))
3493 count
+= count_windows (XWINDOW (window
->hchild
));
3498 save_window_save (window
, vector
, i
)
3500 struct Lisp_Vector
*vector
;
3503 register struct saved_window
*p
;
3504 register struct window
*w
;
3505 register Lisp_Object tem
;
3507 for (;!NILP (window
); window
= w
->next
)
3509 p
= SAVED_WINDOW_N (vector
, i
);
3510 w
= XWINDOW (window
);
3512 XSETFASTINT (w
->temslot
, i
++);
3514 p
->buffer
= w
->buffer
;
3517 p
->width
= w
->width
;
3518 p
->height
= w
->height
;
3519 p
->hscroll
= w
->hscroll
;
3520 p
->display_table
= w
->display_table
;
3521 if (!NILP (w
->buffer
))
3523 /* Save w's value of point in the window configuration.
3524 If w is the selected window, then get the value of point
3525 from the buffer; pointm is garbage in the selected window. */
3526 if (EQ (window
, selected_window
))
3528 p
->pointm
= Fmake_marker ();
3529 set_marker_both (p
->pointm
, w
->buffer
,
3530 BUF_PT (XBUFFER (w
->buffer
)),
3531 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
3534 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
3536 p
->start
= Fcopy_marker (w
->start
, Qnil
);
3537 p
->start_at_line_beg
= w
->start_at_line_beg
;
3539 tem
= XBUFFER (w
->buffer
)->mark
;
3540 p
->mark
= Fcopy_marker (tem
, Qnil
);
3547 p
->start_at_line_beg
= Qnil
;
3550 if (NILP (w
->parent
))
3553 p
->parent
= XWINDOW (w
->parent
)->temslot
;
3558 p
->prev
= XWINDOW (w
->prev
)->temslot
;
3560 if (!NILP (w
->vchild
))
3561 i
= save_window_save (w
->vchild
, vector
, i
);
3562 if (!NILP (w
->hchild
))
3563 i
= save_window_save (w
->hchild
, vector
, i
);
3569 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
3570 Scurrent_window_configuration
, 0, 1, 0,
3571 "Return an object representing the current window configuration of FRAME.\n\
3572 If FRAME is nil or omitted, use the selected frame.\n\
3573 This describes the number of windows, their sizes and current buffers,\n\
3574 and for each displayed buffer, where display starts, and the positions of\n\
3575 point and mark. An exception is made for point in the current buffer:\n\
3576 its value is -not- saved.\n\
3577 This also records the currently selected frame, and FRAME's focus\n\
3578 redirection (see `redirect-frame-focus').")
3582 register Lisp_Object tem
;
3583 register int n_windows
;
3584 register struct save_window_data
*data
;
3585 register struct Lisp_Vector
*vec
;
3593 CHECK_LIVE_FRAME (frame
, 0);
3597 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
3598 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
3599 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
3600 vec
->contents
[i
] = Qnil
;
3601 vec
->size
= VECSIZE (struct save_window_data
);
3602 data
= (struct save_window_data
*)vec
;
3604 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
3605 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
3606 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
3607 XSETFRAME (data
->selected_frame
, selected_frame
);
3608 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
3609 XSETBUFFER (data
->current_buffer
, current_buffer
);
3610 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
3611 data
->root_window
= FRAME_ROOT_WINDOW (f
);
3612 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
3613 XSETINT (data
->min_height
, window_min_height
);
3614 XSETINT (data
->min_width
, window_min_width
);
3615 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
3616 data
->saved_windows
= tem
;
3617 for (i
= 0; i
< n_windows
; i
++)
3618 XVECTOR (tem
)->contents
[i
]
3619 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
3620 save_window_save (FRAME_ROOT_WINDOW (f
),
3622 XSETWINDOW_CONFIGURATION (tem
, data
);
3626 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
3628 "Execute body, preserving window sizes and contents.\n\
3629 Restore which buffer appears in which window, where display starts,\n\
3630 and the value of point and mark for each window.\n\
3631 Also restore which buffer is current.\n\
3632 But do not preserve point in the current buffer.\n\
3633 Does not restore the value of point in current buffer.")
3637 register Lisp_Object val
;
3638 register int count
= specpdl_ptr
- specpdl
;
3640 record_unwind_protect (Fset_window_configuration
,
3641 Fcurrent_window_configuration (Qnil
));
3642 val
= Fprogn (args
);
3643 return unbind_to (count
, val
);
3648 selected_frame
= make_terminal_frame ();
3649 XSETFRAME (Vterminal_frame
, selected_frame
);
3650 minibuf_window
= selected_frame
->minibuffer_window
;
3651 selected_window
= selected_frame
->selected_window
;
3652 last_nonminibuf_frame
= selected_frame
;
3654 window_initialized
= 1;
3659 staticpro (&Qwindow_configuration_change_hook
);
3660 Qwindow_configuration_change_hook
3661 = intern ("window-configuration-change-hook");
3663 Qwindowp
= intern ("windowp");
3664 staticpro (&Qwindowp
);
3666 Qwindow_live_p
= intern ("window-live-p");
3667 staticpro (&Qwindow_live_p
);
3669 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
3670 staticpro (&Qtemp_buffer_show_hook
);
3672 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
3673 "Non-nil means call as function to display a help buffer.\n\
3674 The function is called with one argument, the buffer to be displayed.\n\
3675 Used by `with-output-to-temp-buffer'.\n\
3676 If this function is used, then it must do the entire job of showing\n\
3677 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
3678 Vtemp_buffer_show_function
= Qnil
;
3680 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
3681 "If non-nil, function to call to handle `display-buffer'.\n\
3682 It will receive two args, the buffer and a flag which if non-nil means\n\
3683 that the currently selected window is not acceptable.\n\
3684 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
3685 work using this function.");
3686 Vdisplay_buffer_function
= Qnil
;
3688 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
3689 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
3690 Vminibuf_scroll_window
= Qnil
;
3692 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
3693 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
3694 Vother_window_scroll_buffer
= Qnil
;
3696 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
3697 "*Non-nil means `display-buffer' should make a separate frame.");
3700 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
3701 "Function to call to handle automatic new frame creation.\n\
3702 It is called with no arguments and should return a newly created frame.\n\
3704 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
3705 where `pop-up-frame-alist' would hold the default frame parameters.");
3706 Vpop_up_frame_function
= Qnil
;
3708 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
3709 "*List of buffer names that should have their own special frames.\n\
3710 Displaying a buffer whose name is in this list makes a special frame for it\n\
3711 using `special-display-function'. See also `special-display-regexps'.\n\
3713 An element of the list can be a list instead of just a string.\n\
3714 There are two ways to use a list as an element:\n\
3715 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
3716 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
3717 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
3718 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
3719 All this is done by the function found in `special-display-function'.\n\
3721 If this variable appears \"not to work\", because you add a name to it\n\
3722 but that buffer still appears in the selected window, look at the\n\
3723 values of `same-window-buffer-names' and `same-window-regexps'.\n\
3724 Those variables take precedence over this one.");
3725 Vspecial_display_buffer_names
= Qnil
;
3727 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
3728 "*List of regexps saying which buffers should have their own special frames.\n\
3729 If a buffer name matches one of these regexps, it gets its own frame.\n\
3730 Displaying a buffer whose name is in this list makes a special frame for it\n\
3731 using `special-display-function'.\n\
3733 An element of the list can be a list instead of just a string.\n\
3734 There are two ways to use a list as an element:\n\
3735 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
3736 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
3737 In the latter case, FUNCTION is called with the buffer as first argument,\n\
3738 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
3739 All this is done by the function found in `special-display-function'.\n\
3741 If this variable appears \"not to work\", because you add a regexp to it\n\
3742 but the matching buffers still appear in the selected window, look at the\n\
3743 values of `same-window-buffer-names' and `same-window-regexps'.\n\
3744 Those variables take precedence over this one.");
3745 Vspecial_display_regexps
= Qnil
;
3747 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
3748 "Function to call to make a new frame for a special buffer.\n\
3749 It is called with two arguments, the buffer and optional buffer specific\n\
3750 data, and should return a window displaying that buffer.\n\
3751 The default value makes a separate frame for the buffer,\n\
3752 using `special-display-frame-alist' to specify the frame parameters.\n\
3754 A buffer is special if its is listed in `special-display-buffer-names'\n\
3755 or matches a regexp in `special-display-regexps'.");
3756 Vspecial_display_function
= Qnil
;
3758 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
3759 "*List of buffer names that should appear in the selected window.\n\
3760 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
3761 switches to it in the selected window, rather than making it appear\n\
3762 in some other window.\n\
3764 An element of the list can be a cons cell instead of just a string.\n\
3765 Then the car must be a string, which specifies the buffer name.\n\
3766 This is for compatibility with `special-display-buffer-names';\n\
3767 the cdr of the cons cell is ignored.\n\
3769 See also `same-window-regexps'.");
3770 Vsame_window_buffer_names
= Qnil
;
3772 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
3773 "*List of regexps saying which buffers should appear in the selected window.\n\
3774 If a buffer name matches one of these regexps, then displaying it\n\
3775 using `display-buffer' or `pop-to-buffer' switches to it\n\
3776 in the selected window, rather than making it appear in some other window.\n\
3778 An element of the list can be a cons cell instead of just a string.\n\
3779 Then the car must be a string, which specifies the buffer name.\n\
3780 This is for compatibility with `special-display-buffer-names';\n\
3781 the cdr of the cons cell is ignored.\n\
3783 See also `same-window-buffer-names'.");
3784 Vsame_window_regexps
= Qnil
;
3786 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
3787 "*Non-nil means display-buffer should make new windows.");
3790 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
3791 "*Number of lines of continuity when scrolling by screenfuls.");
3792 next_screen_context_lines
= 2;
3794 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
3795 "*display-buffer would prefer to split the largest window if this large.\n\
3796 If there is only one window, it is split regardless of this value.");
3797 split_height_threshold
= 500;
3799 DEFVAR_INT ("window-min-height", &window_min_height
,
3800 "*Delete any window less than this tall (including its mode line).");
3801 window_min_height
= 4;
3803 DEFVAR_INT ("window-min-width", &window_min_width
,
3804 "*Delete any window less than this wide.");
3805 window_min_width
= 10;
3807 DEFVAR_BOOL ("scroll-preserve-screen-position",
3808 &scroll_preserve_screen_position
,
3809 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
3810 scroll_preserve_screen_position
= 0;
3812 DEFVAR_LISP ("window-configuration-change-hook",
3813 &Vwindow_configuration_change_hook
,
3814 "Functions to call when window configuration changes.\n\
3815 The selected frame is the one whose configuration has changed.");
3816 Vwindow_configuration_change_hook
= Qnil
;
3818 defsubr (&Sselected_window
);
3819 defsubr (&Sminibuffer_window
);
3820 defsubr (&Swindow_minibuffer_p
);
3821 defsubr (&Swindowp
);
3822 defsubr (&Swindow_live_p
);
3823 defsubr (&Spos_visible_in_window_p
);
3824 defsubr (&Swindow_buffer
);
3825 defsubr (&Swindow_height
);
3826 defsubr (&Swindow_width
);
3827 defsubr (&Swindow_hscroll
);
3828 defsubr (&Sset_window_hscroll
);
3829 defsubr (&Swindow_redisplay_end_trigger
);
3830 defsubr (&Sset_window_redisplay_end_trigger
);
3831 defsubr (&Swindow_edges
);
3832 defsubr (&Scoordinates_in_window_p
);
3833 defsubr (&Swindow_at
);
3834 defsubr (&Swindow_point
);
3835 defsubr (&Swindow_start
);
3836 defsubr (&Swindow_end
);
3837 defsubr (&Sset_window_point
);
3838 defsubr (&Sset_window_start
);
3839 defsubr (&Swindow_dedicated_p
);
3840 defsubr (&Sset_window_dedicated_p
);
3841 defsubr (&Swindow_display_table
);
3842 defsubr (&Sset_window_display_table
);
3843 defsubr (&Snext_window
);
3844 defsubr (&Sprevious_window
);
3845 defsubr (&Sother_window
);
3846 defsubr (&Sget_lru_window
);
3847 defsubr (&Sget_largest_window
);
3848 defsubr (&Sget_buffer_window
);
3849 defsubr (&Sdelete_other_windows
);
3850 defsubr (&Sdelete_windows_on
);
3851 defsubr (&Sreplace_buffer_in_windows
);
3852 defsubr (&Sdelete_window
);
3853 defsubr (&Sset_window_buffer
);
3854 defsubr (&Sselect_window
);
3855 defsubr (&Sspecial_display_p
);
3856 defsubr (&Ssame_window_p
);
3857 defsubr (&Sdisplay_buffer
);
3858 defsubr (&Ssplit_window
);
3859 defsubr (&Senlarge_window
);
3860 defsubr (&Sshrink_window
);
3861 defsubr (&Sscroll_up
);
3862 defsubr (&Sscroll_down
);
3863 defsubr (&Sscroll_left
);
3864 defsubr (&Sscroll_right
);
3865 defsubr (&Sother_window_for_scrolling
);
3866 defsubr (&Sscroll_other_window
);
3867 defsubr (&Srecenter
);
3868 defsubr (&Smove_to_window_line
);
3869 defsubr (&Swindow_configuration_p
);
3870 defsubr (&Sset_window_configuration
);
3871 defsubr (&Scurrent_window_configuration
);
3872 defsubr (&Ssave_window_excursion
);
3877 initial_define_key (control_x_map
, '1', "delete-other-windows");
3878 initial_define_key (control_x_map
, '2', "split-window");
3879 initial_define_key (control_x_map
, '0', "delete-window");
3880 initial_define_key (control_x_map
, 'o', "other-window");
3881 initial_define_key (control_x_map
, '^', "enlarge-window");
3882 initial_define_key (control_x_map
, '<', "scroll-left");
3883 initial_define_key (control_x_map
, '>', "scroll-right");
3885 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
3886 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
3887 initial_define_key (meta_map
, 'v', "scroll-down");
3889 initial_define_key (global_map
, Ctl('L'), "recenter");
3890 initial_define_key (meta_map
, 'r', "move-to-window-line");