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
;
716 if (XBUFFER (buf
) != XMARKER (w
->pointm
)->buffer
)
719 if (w
== XWINDOW (XBUFFER (buf
)->last_selected_window
))
720 XBUFFER (buf
)->last_selected_window
= Qnil
;
723 if (w
== XWINDOW (selected_window
)
724 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
725 /* Do this except when the selected window's buffer
726 is being removed from some other window. */
728 /* last_window_start records the start position that this buffer
729 had in the last window to be disconnected from it.
730 Now that this statement is unconditional,
731 it is possible for the buffer to be displayed in the
732 selected window, while last_window_start reflects another
733 window which was recently showing the same buffer.
734 Some people might say that might be a good thing. Let's see. */
735 XBUFFER (buf
)->last_window_start
= marker_position (w
->start
);
737 /* Point in the selected window's buffer
738 is actually stored in that buffer, and the window's pointm isn't used.
739 So don't clobber point in that buffer. */
740 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
))
741 BUF_PT (XBUFFER (buf
))
742 = clip_to_bounds (BUF_BEGV (XBUFFER (buf
)),
743 marker_position (w
->pointm
),
744 BUF_ZV (XBUFFER (buf
)));
747 /* Put replacement into the window structure in place of old. */
749 replace_window (old
, replacement
)
750 Lisp_Object old
, replacement
;
752 register Lisp_Object tem
;
753 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
755 /* If OLD is its frame's root_window, then replacement is the new
756 root_window for that frame. */
758 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
759 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
764 p
->height
= o
->height
;
766 p
->next
= tem
= o
->next
;
768 XWINDOW (tem
)->prev
= replacement
;
770 p
->prev
= tem
= o
->prev
;
772 XWINDOW (tem
)->next
= replacement
;
774 p
->parent
= tem
= o
->parent
;
777 if (EQ (XWINDOW (tem
)->vchild
, old
))
778 XWINDOW (tem
)->vchild
= replacement
;
779 if (EQ (XWINDOW (tem
)->hchild
, old
))
780 XWINDOW (tem
)->hchild
= replacement
;
783 /*** Here, if replacement is a vertical combination
784 and so is its new parent, we should make replacement's
785 children be children of that parent instead. ***/
788 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
789 "Remove WINDOW from the display. Default is selected window.")
791 register Lisp_Object window
;
793 delete_window (window
);
795 if (! NILP (Vwindow_configuration_change_hook
)
796 && ! NILP (Vrun_hooks
))
797 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
803 delete_window (window
)
804 register Lisp_Object window
;
806 register Lisp_Object tem
, parent
, sib
;
807 register struct window
*p
;
808 register struct window
*par
;
810 /* Because this function is called by other C code on non-leaf
811 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
812 so we can't decode_window here. */
814 window
= selected_window
;
816 CHECK_WINDOW (window
, 0);
817 p
= XWINDOW (window
);
819 /* It's okay to delete an already-deleted window. */
827 error ("Attempt to delete minibuffer or sole ordinary window");
828 par
= XWINDOW (parent
);
830 windows_or_buffers_changed
++;
831 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (p
))) = 1;
833 /* Are we trying to delete any frame's selected window? */
835 Lisp_Object frame
, pwindow
;
837 /* See if the frame's selected window is either WINDOW
838 or any subwindow of it, by finding all that window's parents
839 and comparing each one with WINDOW. */
840 frame
= WINDOW_FRAME (XWINDOW (window
));
841 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
843 while (!NILP (pwindow
))
845 if (EQ (window
, pwindow
))
847 pwindow
= XWINDOW (pwindow
)->parent
;
850 if (EQ (window
, pwindow
))
852 Lisp_Object alternative
;
853 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
855 /* If we're about to delete the selected window on the
856 selected frame, then we should use Fselect_window to select
857 the new window. On the other hand, if we're about to
858 delete the selected window on any other frame, we shouldn't do
859 anything but set the frame's selected_window slot. */
860 if (EQ (window
, selected_window
))
861 Fselect_window (alternative
);
863 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
868 /* tem is null for dummy parent windows
869 (which have inferiors but not any contents themselves) */
873 unchain_marker (p
->pointm
);
874 unchain_marker (p
->start
);
879 XWINDOW (tem
)->prev
= p
->prev
;
883 XWINDOW (tem
)->next
= p
->next
;
885 if (EQ (window
, par
->hchild
))
886 par
->hchild
= p
->next
;
887 if (EQ (window
, par
->vchild
))
888 par
->vchild
= p
->next
;
890 /* Find one of our siblings to give our space to. */
894 /* If p gives its space to its next sibling, that sibling needs
895 to have its top/left side pulled back to where p's is.
896 set_window_{height,width} will re-position the sibling's
899 XWINDOW (sib
)->top
= p
->top
;
900 XWINDOW (sib
)->left
= p
->left
;
903 /* Stretch that sibling. */
904 if (!NILP (par
->vchild
))
905 set_window_height (sib
,
906 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
908 if (!NILP (par
->hchild
))
909 set_window_width (sib
,
910 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
913 /* If parent now has only one child,
914 put the child into the parent's place. */
918 if (NILP (XWINDOW (tem
)->next
))
919 replace_window (parent
, tem
);
921 /* Since we may be deleting combination windows, we must make sure that
922 not only p but all its children have been marked as deleted. */
923 if (! NILP (p
->hchild
))
924 delete_all_subwindows (XWINDOW (p
->hchild
));
925 else if (! NILP (p
->vchild
))
926 delete_all_subwindows (XWINDOW (p
->vchild
));
928 /* Mark this window as deleted. */
929 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
933 extern Lisp_Object
next_frame (), prev_frame ();
935 /* This comment supplies the doc string for `next-window',
936 for make-docfile to see. We cannot put this in the real DEFUN
937 due to limits in the Unix cpp.
939 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
940 "Return next window after WINDOW in canonical ordering of windows.\n\
941 If omitted, WINDOW defaults to the selected window.\n\
943 Optional second arg MINIBUF t means count the minibuffer window even\n\
944 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
945 it is active. MINIBUF neither t nor nil means not to count the\n\
946 minibuffer even if it is active.\n\
948 Several frames may share a single minibuffer; if the minibuffer\n\
949 counts, all windows on all frames that share that minibuffer count\n\
950 too. Therefore, `next-window' can be used to iterate through the\n\
951 set of windows even when the minibuffer is on another frame. If the\n\
952 minibuffer does not count, only windows from WINDOW's frame count.\n\
954 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
955 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
956 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
957 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
958 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
959 Anything else means restrict to WINDOW's frame.\n\
961 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
962 `next-window' to iterate through the entire cycle of acceptable\n\
963 windows, eventually ending up back at the window you started with.\n\
964 `previous-window' traverses the same cycle, in the reverse order.")
965 (window, minibuf, all_frames) */
967 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
969 (window
, minibuf
, all_frames
)
970 register Lisp_Object window
, minibuf
, all_frames
;
972 register Lisp_Object tem
;
973 Lisp_Object start_window
;
976 window
= selected_window
;
978 CHECK_LIVE_WINDOW (window
, 0);
980 start_window
= window
;
982 /* minibuf == nil may or may not include minibuffers.
983 Decide if it does. */
985 minibuf
= (minibuf_level
? minibuf_window
: Qlambda
);
986 else if (! EQ (minibuf
, Qt
))
988 /* Now minibuf can be t => count all minibuffer windows,
989 lambda => count none of them,
990 or a specific minibuffer window (the active one) to count. */
992 /* all_frames == nil doesn't specify which frames to include. */
993 if (NILP (all_frames
))
994 all_frames
= (! EQ (minibuf
, Qlambda
)
995 ? (FRAME_MINIBUF_WINDOW
998 (XWINDOW (window
)))))
1000 else if (EQ (all_frames
, Qvisible
))
1002 else if (XFASTINT (all_frames
) == 0)
1004 else if (FRAMEP (all_frames
) && ! EQ (all_frames
, Fwindow_frame (window
)))
1005 /* If all_frames is a frame and window arg isn't on that frame, just
1006 return the first window on the frame. */
1007 return Fframe_first_window (all_frames
);
1008 else if (! EQ (all_frames
, Qt
))
1010 /* Now all_frames is t meaning search all frames,
1011 nil meaning search just current frame,
1012 visible meaning search just visible frames,
1013 0 meaning search visible and iconified frames,
1014 or a window, meaning search the frame that window belongs to. */
1016 /* Do this loop at least once, to get the next window, and perhaps
1017 again, if we hit the minibuffer and that is not acceptable. */
1020 /* Find a window that actually has a next one. This loop
1021 climbs up the tree. */
1022 while (tem
= XWINDOW (window
)->next
, NILP (tem
))
1023 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1027 /* We've reached the end of this frame.
1028 Which other frames are acceptable? */
1029 tem
= WINDOW_FRAME (XWINDOW (window
));
1030 if (! NILP (all_frames
))
1035 tem
= next_frame (tem
, all_frames
);
1036 /* In the case where the minibuffer is active,
1037 and we include its frame as well as the selected one,
1038 next_frame may get stuck in that frame.
1039 If that happens, go back to the selected frame
1040 so we can complete the cycle. */
1042 XSETFRAME (tem
, selected_frame
);
1044 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1051 /* If we're in a combination window, find its first child and
1052 recurse on that. Otherwise, we've found the window we want. */
1055 if (!NILP (XWINDOW (window
)->hchild
))
1056 window
= XWINDOW (window
)->hchild
;
1057 else if (!NILP (XWINDOW (window
)->vchild
))
1058 window
= XWINDOW (window
)->vchild
;
1062 /* Which windows are acceptable?
1063 Exit the loop and accept this window if
1064 this isn't a minibuffer window,
1065 or we're accepting all minibuffer windows,
1066 or this is the active minibuffer and we are accepting that one, or
1067 we've come all the way around and we're back at the original window. */
1068 while (MINI_WINDOW_P (XWINDOW (window
))
1069 && ! EQ (minibuf
, Qt
)
1070 && ! EQ (minibuf
, window
)
1071 && ! EQ (window
, start_window
));
1076 /* This comment supplies the doc string for `previous-window',
1077 for make-docfile to see. We cannot put this in the real DEFUN
1078 due to limits in the Unix cpp.
1080 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1081 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1082 If omitted, WINDOW defaults to the selected window.\n\
1084 Optional second arg MINIBUF t means count the minibuffer window even\n\
1085 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1086 it is active. MINIBUF neither t nor nil means not to count the\n\
1087 minibuffer even if it is active.\n\
1089 Several frames may share a single minibuffer; if the minibuffer\n\
1090 counts, all windows on all frames that share that minibuffer count\n\
1091 too. Therefore, `previous-window' can be used to iterate through\n\
1092 the set of windows even when the minibuffer is on another frame. If\n\
1093 the minibuffer does not count, only windows from WINDOW's frame count\n\
1095 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1096 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1097 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1098 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1099 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1100 Anything else means restrict to WINDOW's frame.\n\
1102 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1103 `previous-window' to iterate through the entire cycle of acceptable\n\
1104 windows, eventually ending up back at the window you started with.\n\
1105 `next-window' traverses the same cycle, in the reverse order.")
1106 (window, minibuf, all_frames) */
1109 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1111 (window
, minibuf
, all_frames
)
1112 register Lisp_Object window
, minibuf
, all_frames
;
1114 register Lisp_Object tem
;
1115 Lisp_Object start_window
;
1118 window
= selected_window
;
1120 CHECK_LIVE_WINDOW (window
, 0);
1122 start_window
= window
;
1124 /* minibuf == nil may or may not include minibuffers.
1125 Decide if it does. */
1127 minibuf
= (minibuf_level
? minibuf_window
: Qlambda
);
1128 else if (! EQ (minibuf
, Qt
))
1130 /* Now minibuf can be t => count all minibuffer windows,
1131 lambda => count none of them,
1132 or a specific minibuffer window (the active one) to count. */
1134 /* all_frames == nil doesn't specify which frames to include.
1135 Decide which frames it includes. */
1136 if (NILP (all_frames
))
1137 all_frames
= (! EQ (minibuf
, Qlambda
)
1138 ? (FRAME_MINIBUF_WINDOW
1141 (XWINDOW (window
)))))
1143 else if (EQ (all_frames
, Qvisible
))
1145 else if (XFASTINT (all_frames
) == 0)
1147 else if (FRAMEP (all_frames
) && ! EQ (all_frames
, Fwindow_frame (window
)))
1148 /* If all_frames is a frame and window arg isn't on that frame, just
1149 return the first window on the frame. */
1150 return Fframe_first_window (all_frames
);
1151 else if (! EQ (all_frames
, Qt
))
1153 /* Now all_frames is t meaning search all frames,
1154 nil meaning search just current frame,
1155 visible meaning search just visible frames,
1156 0 meaning search visible and iconified frames,
1157 or a window, meaning search the frame that window belongs to. */
1159 /* Do this loop at least once, to get the previous window, and perhaps
1160 again, if we hit the minibuffer and that is not acceptable. */
1163 /* Find a window that actually has a previous one. This loop
1164 climbs up the tree. */
1165 while (tem
= XWINDOW (window
)->prev
, NILP (tem
))
1166 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1170 /* We have found the top window on the frame.
1171 Which frames are acceptable? */
1172 tem
= WINDOW_FRAME (XWINDOW (window
));
1173 if (! NILP (all_frames
))
1174 /* It's actually important that we use prev_frame here,
1175 rather than next_frame. All the windows acceptable
1176 according to the given parameters should form a ring;
1177 Fnext_window and Fprevious_window should go back and
1178 forth around the ring. If we use next_frame here,
1179 then Fnext_window and Fprevious_window take different
1180 paths through the set of acceptable windows.
1181 window_loop assumes that these `ring' requirement are
1187 tem
= prev_frame (tem
, all_frames
);
1188 /* In the case where the minibuffer is active,
1189 and we include its frame as well as the selected one,
1190 next_frame may get stuck in that frame.
1191 If that happens, go back to the selected frame
1192 so we can complete the cycle. */
1194 XSETFRAME (tem
, selected_frame
);
1196 /* If this frame has a minibuffer, find that window first,
1197 because it is conceptually the last window in that frame. */
1198 if (FRAME_HAS_MINIBUF_P (XFRAME (tem
)))
1199 tem
= FRAME_MINIBUF_WINDOW (XFRAME (tem
));
1201 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1207 /* If we're in a combination window, find its last child and
1208 recurse on that. Otherwise, we've found the window we want. */
1211 if (!NILP (XWINDOW (window
)->hchild
))
1212 window
= XWINDOW (window
)->hchild
;
1213 else if (!NILP (XWINDOW (window
)->vchild
))
1214 window
= XWINDOW (window
)->vchild
;
1216 while (tem
= XWINDOW (window
)->next
, !NILP (tem
))
1220 /* Which windows are acceptable?
1221 Exit the loop and accept this window if
1222 this isn't a minibuffer window,
1223 or we're accepting all minibuffer windows,
1224 or this is the active minibuffer and we are accepting that one, or
1225 we've come all the way around and we're back at the original window. */
1226 while (MINI_WINDOW_P (XWINDOW (window
))
1227 && ! EQ (minibuf
, Qt
)
1228 && ! EQ (minibuf
, window
)
1229 && ! EQ (window
, start_window
));
1234 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1235 "Select the ARG'th different window on this frame.\n\
1236 All windows on current frame are arranged in a cyclic order.\n\
1237 This command selects the window ARG steps away in that order.\n\
1238 A negative ARG moves in the opposite order. If the optional second\n\
1239 argument ALL_FRAMES is non-nil, cycle through all frames.")
1241 register Lisp_Object arg
, all_frames
;
1244 register Lisp_Object w
;
1246 CHECK_NUMBER (arg
, 0);
1247 w
= selected_window
;
1252 w
= Fnext_window (w
, Qnil
, all_frames
);
1257 w
= Fprevious_window (w
, Qnil
, all_frames
);
1264 /* Look at all windows, performing an operation specified by TYPE
1266 If FRAMES is Qt, look at all frames;
1267 Qnil, look at just the selected frame;
1268 Qvisible, look at visible frames;
1269 a frame, just look at windows on that frame.
1270 If MINI is non-zero, perform the operation on minibuffer windows too.
1276 GET_BUFFER_WINDOW
, /* Arg is buffer */
1277 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1278 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1279 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1281 UNSHOW_BUFFER
/* Arg is buffer */
1285 window_loop (type
, obj
, mini
, frames
)
1286 enum window_loop type
;
1287 register Lisp_Object obj
, frames
;
1290 register Lisp_Object w
;
1291 register Lisp_Object best_window
;
1292 register Lisp_Object next_window
;
1293 register Lisp_Object last_window
;
1295 Lisp_Object frame_arg
;
1298 /* If we're only looping through windows on a particular frame,
1299 frame points to that frame. If we're looping through windows
1300 on all frames, frame is 0. */
1301 if (FRAMEP (frames
))
1302 frame
= XFRAME (frames
);
1303 else if (NILP (frames
))
1304 frame
= selected_frame
;
1308 frame_arg
= Qlambda
;
1309 else if (XFASTINT (frames
) == 0)
1311 else if (EQ (frames
, Qvisible
))
1314 /* frame_arg is Qlambda to stick to one frame,
1315 Qvisible to consider all visible frames,
1318 /* Pick a window to start with. */
1322 w
= FRAME_SELECTED_WINDOW (frame
);
1324 w
= FRAME_SELECTED_WINDOW (selected_frame
);
1326 /* Figure out the last window we're going to mess with. Since
1327 Fnext_window, given the same options, is guaranteed to go in a
1328 ring, we can just use Fprevious_window to find the last one.
1330 We can't just wait until we hit the first window again, because
1331 it might be deleted. */
1333 last_window
= Fprevious_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1338 FRAME_PTR w_frame
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1340 /* Pick the next window now, since some operations will delete
1341 the current window. */
1342 next_window
= Fnext_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1344 /* Note that we do not pay attention here to whether
1345 the frame is visible, since Fnext_window skips non-visible frames
1346 if that is desired, under the control of frame_arg. */
1347 if (! MINI_WINDOW_P (XWINDOW (w
))
1348 || (mini
&& minibuf_level
> 0))
1351 case GET_BUFFER_WINDOW
:
1352 if (XBUFFER (XWINDOW (w
)->buffer
) == XBUFFER (obj
)
1353 /* Don't find any minibuffer window
1354 except the one that is currently in use. */
1355 && (MINI_WINDOW_P (XWINDOW (w
))
1356 ? EQ (w
, minibuf_window
) : 1))
1360 case GET_LRU_WINDOW
:
1361 /* t as arg means consider only full-width windows */
1362 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (XWINDOW (w
)))
1364 /* Ignore dedicated windows and minibuffers. */
1365 if (MINI_WINDOW_P (XWINDOW (w
))
1366 || !NILP (XWINDOW (w
)->dedicated
))
1368 if (NILP (best_window
)
1369 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1370 > XFASTINT (XWINDOW (w
)->use_time
)))
1374 case DELETE_OTHER_WINDOWS
:
1375 if (XWINDOW (w
) != XWINDOW (obj
))
1379 case DELETE_BUFFER_WINDOWS
:
1380 if (EQ (XWINDOW (w
)->buffer
, obj
))
1382 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1384 /* If this window is dedicated, and in a frame of its own,
1386 if (EQ (w
, FRAME_ROOT_WINDOW (f
))
1387 && !NILP (XWINDOW (w
)->dedicated
)
1388 && other_visible_frames (f
))
1390 /* Skip the other windows on this frame.
1391 There might be one, the minibuffer! */
1392 if (! EQ (w
, last_window
))
1393 while (f
== XFRAME (WINDOW_FRAME (XWINDOW (next_window
))))
1395 /* As we go, check for the end of the loop.
1396 We mustn't start going around a second time. */
1397 if (EQ (next_window
, last_window
))
1402 next_window
= Fnext_window (next_window
,
1406 /* Now we can safely delete the frame. */
1407 Fdelete_frame (WINDOW_FRAME (XWINDOW (w
)), Qnil
);
1410 /* If we're deleting the buffer displayed in the only window
1411 on the frame, find a new buffer to display there. */
1412 if (NILP (XWINDOW (w
)->parent
))
1414 Lisp_Object new_buffer
;
1415 new_buffer
= Fother_buffer (obj
, Qnil
);
1416 if (NILP (new_buffer
))
1418 = Fget_buffer_create (build_string ("*scratch*"));
1419 Fset_window_buffer (w
, new_buffer
);
1420 if (EQ (w
, selected_window
))
1421 Fset_buffer (XWINDOW (w
)->buffer
);
1428 case GET_LARGEST_WINDOW
:
1429 /* Ignore dedicated windows and minibuffers. */
1430 if (MINI_WINDOW_P (XWINDOW (w
))
1431 || !NILP (XWINDOW (w
)->dedicated
))
1434 struct window
*best_window_ptr
= XWINDOW (best_window
);
1435 struct window
*w_ptr
= XWINDOW (w
);
1436 if (NILP (best_window
)
1437 || (XFASTINT (w_ptr
->height
) * XFASTINT (w_ptr
->width
)
1438 > (XFASTINT (best_window_ptr
->height
)
1439 * XFASTINT (best_window_ptr
->width
))))
1445 if (EQ (XWINDOW (w
)->buffer
, obj
))
1447 /* Find another buffer to show in this window. */
1448 Lisp_Object another_buffer
;
1449 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1450 another_buffer
= Fother_buffer (obj
, Qnil
);
1451 if (NILP (another_buffer
))
1453 = Fget_buffer_create (build_string ("*scratch*"));
1454 /* If this window is dedicated, and in a frame of its own,
1456 if (EQ (w
, FRAME_ROOT_WINDOW (f
))
1457 && !NILP (XWINDOW (w
)->dedicated
)
1458 && other_visible_frames (f
))
1460 /* Skip the other windows on this frame.
1461 There might be one, the minibuffer! */
1462 if (! EQ (w
, last_window
))
1463 while (f
== XFRAME (WINDOW_FRAME (XWINDOW (next_window
))))
1465 /* As we go, check for the end of the loop.
1466 We mustn't start going around a second time. */
1467 if (EQ (next_window
, last_window
))
1472 next_window
= Fnext_window (next_window
,
1476 /* Now we can safely delete the frame. */
1477 Fdelete_frame (WINDOW_FRAME (XWINDOW (w
)), Qnil
);
1481 /* Otherwise show a different buffer in the window. */
1482 XWINDOW (w
)->dedicated
= Qnil
;
1483 Fset_window_buffer (w
, another_buffer
);
1484 if (EQ (w
, selected_window
))
1485 Fset_buffer (XWINDOW (w
)->buffer
);
1491 if (EQ (w
, last_window
))
1500 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1501 "Return the window least recently selected or used for display.\n\
1502 If optional argument FRAME is `visible', search all visible frames.\n\
1503 If FRAME is 0, search all visible and iconified frames.\n\
1504 If FRAME is t, search all frames.\n\
1505 If FRAME is nil, search only the selected frame.\n\
1506 If FRAME is a frame, search only that frame.")
1510 register Lisp_Object w
;
1511 /* First try for a window that is full-width */
1512 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1513 if (!NILP (w
) && !EQ (w
, selected_window
))
1515 /* If none of them, try the rest */
1516 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1519 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1520 "Return the largest window in area.\n\
1521 If optional argument FRAME is `visible', search all visible frames.\n\
1522 If FRAME is 0, search all visible and iconified frames.\n\
1523 If FRAME is t, search all frames.\n\
1524 If FRAME is nil, search only the selected frame.\n\
1525 If FRAME is a frame, search only that frame.")
1529 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1533 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1534 "Return a window currently displaying BUFFER, or nil if none.\n\
1535 If optional argument FRAME is `visible', search all visible frames.\n\
1536 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1537 If FRAME is t, search all frames.\n\
1538 If FRAME is nil, search only the selected frame.\n\
1539 If FRAME is a frame, search only that frame.")
1541 Lisp_Object buffer
, frame
;
1543 buffer
= Fget_buffer (buffer
);
1544 if (BUFFERP (buffer
))
1545 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1550 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1552 "Make WINDOW (or the selected window) fill its frame.\n\
1553 Only the frame WINDOW is on is affected.\n\
1554 This function tries to reduce display jumps\n\
1555 by keeping the text previously visible in WINDOW\n\
1556 in the same place on the frame. Doing this depends on\n\
1557 the value of (window-start WINDOW), so if calling this function\n\
1558 in a program gives strange scrolling, make sure the window-start\n\
1559 value is reasonable when this function is called.")
1568 window
= selected_window
;
1570 CHECK_LIVE_WINDOW (window
, 0);
1572 w
= XWINDOW (window
);
1574 startpos
= marker_position (w
->start
);
1575 top
= XFASTINT (w
->top
) - FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w
)));
1577 if (MINI_WINDOW_P (w
) && top
> 0)
1578 error ("Can't expand minibuffer to full frame");
1580 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1582 /* Try to minimize scrolling, by setting the window start to the point
1583 will cause the text at the old window start to be at the same place
1584 on the frame. But don't try to do this if the window start is
1585 outside the visible portion (as might happen when the display is
1586 not current, due to typeahead). */
1587 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
1588 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
1590 struct position pos
;
1591 struct buffer
*obuf
= current_buffer
;
1593 Fset_buffer (w
->buffer
);
1594 /* This computation used to temporarily move point, but that can
1595 have unwanted side effects due to text properties. */
1596 pos
= *vmotion (startpos
, -top
, w
);
1598 Fset_marker (w
->start
, make_number (pos
.bufpos
), w
->buffer
);
1599 w
->start_at_line_beg
= ((pos
.bufpos
== BEGV
1600 || FETCH_BYTE (pos
.bufpos
- 1) == '\n') ? Qt
1602 /* We need to do this, so that the window-scroll-functions
1604 w
->optional_new_start
= Qt
;
1606 set_buffer_internal (obuf
);
1611 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1612 1, 2, "bDelete windows on (buffer): ",
1613 "Delete all windows showing BUFFER.\n\
1614 Optional second argument FRAME controls which frames are affected.\n\
1615 If nil or omitted, delete all windows showing BUFFER in any frame.\n\
1616 If t, delete only windows showing BUFFER in the selected frame.\n\
1617 If `visible', delete all windows showing BUFFER in any visible frame.\n\
1618 If a frame, delete only windows showing BUFFER in that frame.")
1620 Lisp_Object buffer
, frame
;
1622 /* FRAME uses t and nil to mean the opposite of what window_loop
1624 if (! FRAMEP (frame
))
1625 frame
= NILP (frame
) ? Qt
: Qnil
;
1629 buffer
= Fget_buffer (buffer
);
1630 CHECK_BUFFER (buffer
, 0);
1631 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1636 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1637 Sreplace_buffer_in_windows
,
1638 1, 1, "bReplace buffer in windows: ",
1639 "Replace BUFFER with some other buffer in all windows showing it.")
1645 buffer
= Fget_buffer (buffer
);
1646 CHECK_BUFFER (buffer
, 0);
1647 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1652 /* Replace BUFFER with some other buffer in all windows
1653 of all frames, even those on other keyboards. */
1656 replace_buffer_in_all_windows (buffer
)
1660 Lisp_Object tail
, frame
;
1662 /* A single call to window_loop won't do the job
1663 because it only considers frames on the current keyboard.
1664 So loop manually over frames, and handle each one. */
1665 FOR_EACH_FRAME (tail
, frame
)
1666 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
1668 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
1672 /* Set the height of WINDOW and all its inferiors. */
1674 /* The smallest acceptable dimensions for a window. Anything smaller
1675 might crash Emacs. */
1676 #define MIN_SAFE_WINDOW_WIDTH (2)
1677 #define MIN_SAFE_WINDOW_HEIGHT (2)
1679 /* Make sure that window_min_height and window_min_width are
1680 not too small; if they are, set them to safe minima. */
1683 check_min_window_sizes ()
1685 /* Smaller values might permit a crash. */
1686 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1687 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1688 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1689 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1692 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1693 minimum allowable size. */
1695 check_frame_size (frame
, rows
, cols
)
1699 /* For height, we have to see:
1700 whether the frame has a minibuffer,
1701 whether it wants a mode line, and
1702 whether it has a menu bar. */
1704 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1705 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1706 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1707 if (FRAME_MENU_BAR_LINES (frame
) > 0)
1708 min_height
+= FRAME_MENU_BAR_LINES (frame
);
1710 if (*rows
< min_height
)
1712 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
1713 *cols
= MIN_SAFE_WINDOW_WIDTH
;
1716 /* Normally the window is deleted if it gets too small.
1717 nodelete nonzero means do not do this.
1718 (The caller should check later and do so if appropriate) */
1721 set_window_height (window
, height
, nodelete
)
1726 register struct window
*w
= XWINDOW (window
);
1727 register struct window
*c
;
1728 int oheight
= XFASTINT (w
->height
);
1729 int top
, pos
, lastbot
, opos
, lastobot
;
1732 check_min_window_sizes ();
1735 && ! NILP (w
->parent
)
1736 && (MINI_WINDOW_P (w
)
1738 : height
< window_min_height
))
1740 delete_window (window
);
1744 XSETFASTINT (w
->last_modified
, 0);
1745 XSETFASTINT (w
->last_overlay_modified
, 0);
1746 windows_or_buffers_changed
++;
1747 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
1749 XSETFASTINT (w
->height
, height
);
1750 if (!NILP (w
->hchild
))
1752 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1754 XWINDOW (child
)->top
= w
->top
;
1755 set_window_height (child
, height
, nodelete
);
1758 else if (!NILP (w
->vchild
))
1760 lastbot
= top
= XFASTINT (w
->top
);
1762 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
1764 c
= XWINDOW (child
);
1766 opos
= lastobot
+ XFASTINT (c
->height
);
1768 XSETFASTINT (c
->top
, lastbot
);
1770 pos
= (((opos
* height
) << 1) + oheight
) / (oheight
<< 1);
1772 /* Avoid confusion: inhibit deletion of child if becomes too small */
1773 set_window_height (child
, pos
+ top
- lastbot
, 1);
1775 /* Now advance child to next window,
1776 and set lastbot if child was not just deleted. */
1777 lastbot
= pos
+ top
;
1780 /* Now delete any children that became too small. */
1782 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1784 set_window_height (child
, XINT (XWINDOW (child
)->height
), 0);
1789 /* Recursively set width of WINDOW and its inferiors. */
1792 set_window_width (window
, width
, nodelete
)
1797 register struct window
*w
= XWINDOW (window
);
1798 register struct window
*c
;
1799 int owidth
= XFASTINT (w
->width
);
1800 int left
, pos
, lastright
, opos
, lastoright
;
1803 if (!nodelete
&& width
< window_min_width
&& !NILP (w
->parent
))
1805 delete_window (window
);
1809 XSETFASTINT (w
->last_modified
, 0);
1810 XSETFASTINT (w
->last_overlay_modified
, 0);
1811 windows_or_buffers_changed
++;
1812 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
1814 XSETFASTINT (w
->width
, width
);
1815 if (!NILP (w
->vchild
))
1817 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1819 XWINDOW (child
)->left
= w
->left
;
1820 set_window_width (child
, width
, nodelete
);
1823 else if (!NILP (w
->hchild
))
1825 lastright
= left
= XFASTINT (w
->left
);
1827 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
1829 c
= XWINDOW (child
);
1831 opos
= lastoright
+ XFASTINT (c
->width
);
1833 XSETFASTINT (c
->left
, lastright
);
1835 pos
= (((opos
* width
) << 1) + owidth
) / (owidth
<< 1);
1837 /* Inhibit deletion for becoming too small */
1838 set_window_width (child
, pos
+ left
- lastright
, 1);
1840 /* Now advance child to next window,
1841 and set lastright if child was not just deleted. */
1842 lastright
= pos
+ left
, lastoright
= opos
;
1844 /* Delete children that became too small */
1846 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1848 set_window_width (child
, XINT (XWINDOW (child
)->width
), 0);
1853 int window_select_count
;
1856 Fset_window_buffer_unwind (obuf
)
1863 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
1864 "Make WINDOW display BUFFER as its contents.\n\
1865 BUFFER can be a buffer or buffer name.")
1867 register Lisp_Object window
, buffer
;
1869 register Lisp_Object tem
;
1870 register struct window
*w
= decode_window (window
);
1871 int count
= specpdl_ptr
- specpdl
;
1873 buffer
= Fget_buffer (buffer
);
1874 CHECK_BUFFER (buffer
, 1);
1876 if (NILP (XBUFFER (buffer
)->name
))
1877 error ("Attempt to display deleted buffer");
1881 error ("Window is deleted");
1882 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
1883 is first being set up. */
1885 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
1886 error ("Window is dedicated to `%s'",
1887 XSTRING (XBUFFER (tem
)->name
)->data
);
1894 if (EQ (window
, selected_window
))
1895 XBUFFER (w
->buffer
)->last_selected_window
= window
;
1896 if (INTEGERP (XBUFFER (buffer
)->display_count
))
1897 XSETINT (XBUFFER (buffer
)->display_count
,
1898 XINT (XBUFFER (buffer
)->display_count
) + 1);
1900 XSETFASTINT (w
->window_end_pos
, 0);
1901 w
->window_end_valid
= Qnil
;
1902 XSETFASTINT (w
->hscroll
, 0);
1903 Fset_marker (w
->pointm
,
1904 make_number (BUF_PT (XBUFFER (buffer
))),
1906 set_marker_restricted (w
->start
,
1907 make_number (XBUFFER (buffer
)->last_window_start
),
1909 w
->start_at_line_beg
= Qnil
;
1910 w
->force_start
= Qnil
;
1911 XSETFASTINT (w
->last_modified
, 0);
1912 XSETFASTINT (w
->last_overlay_modified
, 0);
1913 windows_or_buffers_changed
++;
1915 /* We must select BUFFER for running the window-scroll-functions.
1916 If WINDOW is selected, switch permanently.
1917 Otherwise, switch but go back to the ambient buffer afterward. */
1918 if (EQ (window
, selected_window
))
1919 Fset_buffer (buffer
);
1920 /* We can't check ! NILP (Vwindow_scroll_functions) here
1921 because that might itself be a local variable. */
1922 else if (window_initialized
)
1924 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
1925 Fset_buffer (buffer
);
1928 if (! NILP (Vwindow_scroll_functions
))
1929 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1930 Fmarker_position (w
->start
));
1932 if (! NILP (Vwindow_configuration_change_hook
)
1933 && ! NILP (Vrun_hooks
))
1934 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1936 unbind_to (count
, Qnil
);
1941 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
1942 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
1943 The main editor command loop selects the buffer of the selected window\n\
1944 before each command.")
1946 register Lisp_Object window
;
1948 register struct window
*w
;
1949 register struct window
*ow
= XWINDOW (selected_window
);
1951 CHECK_LIVE_WINDOW (window
, 0);
1953 w
= XWINDOW (window
);
1955 if (NILP (w
->buffer
))
1956 error ("Trying to select deleted window or non-leaf window");
1958 XSETFASTINT (w
->use_time
, ++window_select_count
);
1959 if (EQ (window
, selected_window
))
1962 Fset_marker (ow
->pointm
, make_number (BUF_PT (XBUFFER (ow
->buffer
))),
1965 selected_window
= window
;
1966 if (XFRAME (WINDOW_FRAME (w
)) != selected_frame
)
1968 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
1969 /* Use this rather than Fhandle_switch_frame
1970 so that FRAME_FOCUS_FRAME is moved appropriately as we
1971 move around in the state where a minibuffer in a separate
1973 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
1976 selected_frame
->selected_window
= window
;
1978 record_buffer (w
->buffer
);
1979 Fset_buffer (w
->buffer
);
1981 XBUFFER (w
->buffer
)->last_selected_window
= window
;
1983 /* Go to the point recorded in the window.
1984 This is important when the buffer is in more
1985 than one window. It also matters when
1986 redisplay_window has altered point after scrolling,
1987 because it makes the change only in the window. */
1989 register int new_point
= marker_position (w
->pointm
);
1990 if (new_point
< BEGV
)
1992 else if (new_point
> ZV
)
1998 windows_or_buffers_changed
++;
2002 /* Deiconify the frame containing the window WINDOW,
2003 unless it is the selected frame;
2006 The reason for the exception for the selected frame
2007 is that it seems better not to change the selected frames visibility
2008 merely because of displaying a different buffer in it.
2009 The deiconification is useful when a buffer gets shown in
2010 another frame that you were not using lately. */
2013 display_buffer_1 (window
)
2016 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
2017 FRAME_SAMPLE_VISIBILITY (f
);
2018 if (f
!= selected_frame
)
2020 if (FRAME_ICONIFIED_P (f
))
2021 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
2022 else if (FRAME_VISIBLE_P (f
))
2023 Fraise_frame (WINDOW_FRAME (XWINDOW (window
)));
2028 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2029 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2030 The value is actually t if the frame should be called with default frame\n\
2031 parameters, and a list of frame parameters if they were specified.\n\
2032 See `special-display-buffer-names', and `special-display-regexps'.")
2034 Lisp_Object buffer_name
;
2038 CHECK_STRING (buffer_name
, 1);
2040 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2044 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2048 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2050 Lisp_Object car
= XCAR (tem
);
2052 && fast_string_match (car
, buffer_name
) >= 0)
2054 else if (CONSP (car
)
2055 && STRINGP (XCAR (car
))
2056 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2062 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2063 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2064 See `same-window-buffer-names' and `same-window-regexps'.")
2066 Lisp_Object buffer_name
;
2070 CHECK_STRING (buffer_name
, 1);
2072 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2076 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2080 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2082 Lisp_Object car
= XCAR (tem
);
2084 && fast_string_match (car
, buffer_name
) >= 0)
2086 else if (CONSP (car
)
2087 && STRINGP (XCAR (car
))
2088 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2094 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 2,
2095 "BDisplay buffer: \nP", /* Use B so the default is (other-buffer). */
2096 "Make BUFFER appear in some window but don't select it.\n\
2097 BUFFER can be a buffer or a buffer name.\n\
2098 If BUFFER is shown already in some window, just use that one,\n\
2099 unless the window is the selected window and the optional second\n\
2100 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2101 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2102 Returns the window displaying BUFFER.\n\
2104 The variables `special-display-buffer-names', `special-display-regexps',\n\
2105 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2106 buffer names are handled.")
2107 (buffer
, not_this_window
)
2108 register Lisp_Object buffer
, not_this_window
;
2110 register Lisp_Object window
, tem
;
2112 buffer
= Fget_buffer (buffer
);
2113 CHECK_BUFFER (buffer
, 0);
2115 if (!NILP (Vdisplay_buffer_function
))
2116 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2118 if (NILP (not_this_window
)
2119 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2120 return display_buffer_1 (selected_window
);
2122 /* See if the user has specified this buffer should appear
2123 in the selected window. */
2124 if (NILP (not_this_window
))
2126 tem
= Fsame_window_p (XBUFFER (buffer
)->name
);
2129 Fswitch_to_buffer (buffer
, Qnil
);
2130 return display_buffer_1 (selected_window
);
2134 /* If pop_up_frames,
2135 look for a window showing BUFFER on any visible or iconified frame.
2136 Otherwise search only the current frame. */
2137 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2138 XSETFASTINT (tem
, 0);
2140 XSETFRAME (tem
, last_nonminibuf_frame
);
2141 window
= Fget_buffer_window (buffer
, tem
);
2143 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2145 return display_buffer_1 (window
);
2148 /* Certain buffer names get special handling. */
2149 if (!NILP (Vspecial_display_function
))
2151 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2153 return call1 (Vspecial_display_function
, buffer
);
2155 return call2 (Vspecial_display_function
, buffer
, tem
);
2158 /* If there are no frames open that have more than a minibuffer,
2159 we need to create a new frame. */
2160 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2162 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2163 Fset_window_buffer (window
, buffer
);
2164 return display_buffer_1 (window
);
2168 || FRAME_MINIBUF_ONLY_P (selected_frame
)
2169 /* If the current frame is a special display frame,
2170 don't try to reuse its windows. */
2171 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->dedicated
)
2177 if (FRAME_MINIBUF_ONLY_P (selected_frame
))
2178 XSETFRAME (frames
, last_nonminibuf_frame
);
2179 /* Don't try to create a window if would get an error */
2180 if (split_height_threshold
< window_min_height
<< 1)
2181 split_height_threshold
= window_min_height
<< 1;
2183 /* Note that both Fget_largest_window and Fget_lru_window
2184 ignore minibuffers and dedicated windows.
2185 This means they can return nil. */
2187 /* If the frame we would try to split cannot be split,
2188 try other frames. */
2189 if (FRAME_NO_SPLIT_P (NILP (frames
) ? selected_frame
2190 : last_nonminibuf_frame
))
2192 /* Try visible frames first. */
2193 window
= Fget_largest_window (Qvisible
);
2194 /* If that didn't work, try iconified frames. */
2196 window
= Fget_largest_window (make_number (0));
2198 window
= Fget_largest_window (Qt
);
2201 window
= Fget_largest_window (frames
);
2203 /* If we got a tall enough full-width window that can be split,
2206 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2207 && window_height (window
) >= split_height_threshold
2208 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2209 window
= Fsplit_window (window
, Qnil
, Qnil
);
2212 Lisp_Object upper
, lower
, other
;
2214 window
= Fget_lru_window (frames
);
2215 /* If the LRU window is selected, and big enough,
2216 and can be split, split it. */
2218 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2219 && (EQ (window
, selected_window
)
2220 || EQ (XWINDOW (window
)->parent
, Qnil
))
2221 && window_height (window
) >= window_min_height
<< 1)
2222 window
= Fsplit_window (window
, Qnil
, Qnil
);
2223 /* If Fget_lru_window returned nil, try other approaches. */
2225 /* Try visible frames first. */
2227 window
= Fget_buffer_window (buffer
, Qvisible
);
2229 window
= Fget_largest_window (Qvisible
);
2230 /* If that didn't work, try iconified frames. */
2232 window
= Fget_buffer_window (buffer
, make_number (0));
2234 window
= Fget_largest_window (make_number (0));
2235 /* Try invisible frames. */
2237 window
= Fget_buffer_window (buffer
, Qt
);
2239 window
= Fget_largest_window (Qt
);
2240 /* As a last resort, make a new frame. */
2242 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2243 /* If window appears above or below another,
2244 even out their heights. */
2245 other
= upper
= lower
= Qnil
;
2246 if (!NILP (XWINDOW (window
)->prev
))
2247 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
2248 if (!NILP (XWINDOW (window
)->next
))
2249 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
2251 /* Check that OTHER and WINDOW are vertically arrayed. */
2252 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
2253 && (XFASTINT (XWINDOW (other
)->height
)
2254 > XFASTINT (XWINDOW (window
)->height
)))
2256 int total
= (XFASTINT (XWINDOW (other
)->height
)
2257 + XFASTINT (XWINDOW (window
)->height
));
2258 Lisp_Object old_selected_window
;
2259 old_selected_window
= selected_window
;
2261 selected_window
= upper
;
2262 change_window_height ((total
/ 2
2263 - XFASTINT (XWINDOW (upper
)->height
)),
2265 selected_window
= old_selected_window
;
2270 window
= Fget_lru_window (Qnil
);
2272 Fset_window_buffer (window
, buffer
);
2273 return display_buffer_1 (window
);
2277 temp_output_buffer_show (buf
)
2278 register Lisp_Object buf
;
2280 register struct buffer
*old
= current_buffer
;
2281 register Lisp_Object window
;
2282 register struct window
*w
;
2284 XBUFFER (buf
)->directory
= current_buffer
->directory
;
2287 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
2291 XBUFFER (buf
)->clip_changed
= 1;
2292 set_buffer_internal (old
);
2294 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
2295 call1 (Vtemp_buffer_show_function
, buf
);
2298 window
= Fdisplay_buffer (buf
, Qnil
);
2300 if (XFRAME (XWINDOW (window
)->frame
) != selected_frame
)
2301 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
2302 Vminibuf_scroll_window
= window
;
2303 w
= XWINDOW (window
);
2304 XSETFASTINT (w
->hscroll
, 0);
2305 set_marker_restricted (w
->start
, make_number (1), buf
);
2306 set_marker_restricted (w
->pointm
, make_number (1), buf
);
2308 /* Run temp-buffer-show-hook, with the chosen window selected. */
2309 if (!NILP (Vrun_hooks
))
2312 tem
= Fboundp (Qtemp_buffer_show_hook
);
2315 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
2318 int count
= specpdl_ptr
- specpdl
;
2320 /* Select the window that was chosen, for running the hook. */
2321 record_unwind_protect (Fset_window_configuration
,
2322 Fcurrent_window_configuration (Qnil
));
2324 Fselect_window (window
);
2325 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
2326 unbind_to (count
, Qnil
);
2334 make_dummy_parent (window
)
2338 register struct window
*o
, *p
;
2339 register struct Lisp_Vector
*vec
;
2342 o
= XWINDOW (window
);
2343 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
2344 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
2345 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
2346 vec
->size
= VECSIZE (struct window
);
2347 p
= (struct window
*)vec
;
2348 XSETWINDOW (new, p
);
2350 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
2352 /* Put new into window structure in place of window */
2353 replace_window (window
, new);
2366 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
2367 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
2368 WINDOW defaults to selected one and SIZE to half its size.\n\
2369 If optional third arg HORFLAG is non-nil, split side by side\n\
2370 and put SIZE columns in the first of the pair.")
2371 (window
, size
, horflag
)
2372 Lisp_Object window
, size
, horflag
;
2374 register Lisp_Object
new;
2375 register struct window
*o
, *p
;
2377 register int size_int
;
2380 window
= selected_window
;
2382 CHECK_LIVE_WINDOW (window
, 0);
2384 o
= XWINDOW (window
);
2385 fo
= XFRAME (WINDOW_FRAME (o
));
2389 if (!NILP (horflag
))
2390 /* Calculate the size of the left-hand window, by dividing
2391 the usable space in columns by two. */
2392 size_int
= XFASTINT (o
->width
) >> 1;
2394 size_int
= XFASTINT (o
->height
) >> 1;
2398 CHECK_NUMBER (size
, 1);
2399 size_int
= XINT (size
);
2402 if (MINI_WINDOW_P (o
))
2403 error ("Attempt to split minibuffer window");
2405 check_min_window_sizes ();
2409 if (size_int
< window_min_height
)
2410 error ("Window height %d too small (after splitting)", size_int
);
2411 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
2412 error ("Window height %d too small (after splitting)",
2413 XFASTINT (o
->height
) - size_int
);
2414 if (NILP (o
->parent
)
2415 || NILP (XWINDOW (o
->parent
)->vchild
))
2417 make_dummy_parent (window
);
2419 XWINDOW (new)->vchild
= window
;
2424 if (size_int
< window_min_width
)
2425 error ("Window width %d too small (after splitting)", size_int
);
2427 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
2428 error ("Window width %d too small (after splitting)",
2429 XFASTINT (o
->width
) - size_int
);
2430 if (NILP (o
->parent
)
2431 || NILP (XWINDOW (o
->parent
)->hchild
))
2433 make_dummy_parent (window
);
2435 XWINDOW (new)->hchild
= window
;
2439 /* Now we know that window's parent is a vertical combination
2440 if we are dividing vertically, or a horizontal combination
2441 if we are making side-by-side windows */
2443 windows_or_buffers_changed
++;
2444 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
2445 new = make_window ();
2448 p
->frame
= o
->frame
;
2450 if (!NILP (p
->next
))
2451 XWINDOW (p
->next
)->prev
= new;
2454 p
->parent
= o
->parent
;
2457 /* Apportion the available frame space among the two new windows */
2459 if (!NILP (horflag
))
2461 p
->height
= o
->height
;
2463 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
2464 XSETFASTINT (o
->width
, size_int
);
2465 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
2470 p
->width
= o
->width
;
2471 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
2472 XSETFASTINT (o
->height
, size_int
);
2473 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
2476 Fset_window_buffer (new, o
->buffer
);
2481 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
2482 "Make current window ARG lines bigger.\n\
2483 From program, optional second arg non-nil means grow sideways ARG columns.")
2485 register Lisp_Object arg
, side
;
2487 CHECK_NUMBER (arg
, 0);
2488 change_window_height (XINT (arg
), !NILP (side
));
2490 if (! NILP (Vwindow_configuration_change_hook
))
2491 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2496 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
2497 "Make current window ARG lines smaller.\n\
2498 From program, optional second arg non-nil means shrink sideways arg columns.")
2500 register Lisp_Object arg
, side
;
2502 CHECK_NUMBER (arg
, 0);
2503 change_window_height (-XINT (arg
), !NILP (side
));
2505 if (! NILP (Vwindow_configuration_change_hook
))
2506 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2512 window_height (window
)
2515 register struct window
*p
= XWINDOW (window
);
2516 return XFASTINT (p
->height
);
2520 window_width (window
)
2523 register struct window
*p
= XWINDOW (window
);
2524 return XFASTINT (p
->width
);
2527 #define MINSIZE(w) \
2529 ? window_min_width \
2530 : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height))
2533 *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top))
2535 #define CURSIZE(w) \
2536 *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height))
2538 /* Unlike set_window_height, this function
2539 also changes the heights of the siblings so as to
2540 keep everything consistent. */
2543 change_window_height (delta
, widthflag
)
2547 register Lisp_Object parent
;
2549 register struct window
*p
;
2551 int (*sizefun
) P_ ((Lisp_Object
))
2552 = widthflag
? window_width
: window_height
;
2553 register void (*setsizefun
) P_ ((Lisp_Object
, int, int))
2554 = (widthflag
? set_window_width
: set_window_height
);
2556 Lisp_Object next
, prev
;
2558 check_min_window_sizes ();
2560 window
= selected_window
;
2563 p
= XWINDOW (window
);
2568 error ("No other window to side of this one");
2571 if (widthflag
? !NILP (XWINDOW (parent
)->hchild
)
2572 : !NILP (XWINDOW (parent
)->vchild
))
2577 sizep
= &CURSIZE (window
);
2580 register int maxdelta
;
2582 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - *sizep
2583 : !NILP (p
->next
) ? (*sizefun
) (p
->next
) - MINSIZE (p
->next
)
2584 : !NILP (p
->prev
) ? (*sizefun
) (p
->prev
) - MINSIZE (p
->prev
)
2585 /* This is a frame with only one window, a minibuffer-only
2586 or a minibufferless frame. */
2589 if (delta
> maxdelta
)
2590 /* This case traps trying to make the minibuffer
2591 the full frame, or make the only window aside from the
2592 minibuffer the full frame. */
2596 if (*sizep
+ delta
< MINSIZE (window
))
2598 delete_window (window
);
2605 /* Find the total we can get from other siblings. */
2607 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
2608 maximum
+= (*sizefun
) (next
) - MINSIZE (next
);
2609 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
2610 maximum
+= (*sizefun
) (prev
) - MINSIZE (prev
);
2612 /* If we can get it all from them, do so. */
2613 if (delta
<= maximum
)
2615 Lisp_Object first_unaffected
;
2616 Lisp_Object first_affected
;
2620 first_affected
= window
;
2621 /* Look at one sibling at a time,
2622 moving away from this window in both directions alternately,
2623 and take as much as we can get without deleting that sibling. */
2630 int this_one
= (*sizefun
) (next
) - MINSIZE (next
);
2631 if (this_one
> delta
)
2634 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
2635 (*setsizefun
) (window
, *sizep
+ this_one
, 0);
2638 next
= XWINDOW (next
)->next
;
2644 int this_one
= (*sizefun
) (prev
) - MINSIZE (prev
);
2645 if (this_one
> delta
)
2648 first_affected
= prev
;
2650 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
2651 (*setsizefun
) (window
, *sizep
+ this_one
, 0);
2654 prev
= XWINDOW (prev
)->prev
;
2658 /* Now recalculate the edge positions of all the windows affected,
2659 based on the new sizes. */
2660 first_unaffected
= next
;
2661 prev
= first_affected
;
2662 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
2663 prev
= next
, next
= XWINDOW (next
)->next
)
2665 CURBEG (next
) = CURBEG (prev
) + (*sizefun
) (prev
);
2666 /* This does not change size of NEXT,
2667 but it propagates the new top edge to its children */
2668 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
2673 register int delta1
;
2674 register int opht
= (*sizefun
) (parent
);
2676 /* If trying to grow this window to or beyond size of the parent,
2677 make delta1 so big that, on shrinking back down,
2678 all the siblings end up with less than one line and are deleted. */
2679 if (opht
<= *sizep
+ delta
)
2680 delta1
= opht
* opht
* 2;
2681 /* Otherwise, make delta1 just right so that if we add delta1
2682 lines to this window and to the parent, and then shrink
2683 the parent back to its original size, the new proportional
2684 size of this window will increase by delta. */
2686 delta1
= (delta
* opht
* 100) / ((opht
- *sizep
- delta
) * 100);
2688 /* Add delta1 lines or columns to this window, and to the parent,
2689 keeping things consistent while not affecting siblings. */
2690 CURSIZE (parent
) = opht
+ delta1
;
2691 (*setsizefun
) (window
, *sizep
+ delta1
, 0);
2693 /* Squeeze out delta1 lines or columns from our parent,
2694 shriking this window and siblings proportionately.
2695 This brings parent back to correct size.
2696 Delta1 was calculated so this makes this window the desired size,
2697 taking it all out of the siblings. */
2698 (*setsizefun
) (parent
, opht
, 0);
2701 XSETFASTINT (p
->last_modified
, 0);
2702 XSETFASTINT (p
->last_overlay_modified
, 0);
2709 /* Return number of lines of text (not counting mode line) in W. */
2712 window_internal_height (w
)
2715 int ht
= XFASTINT (w
->height
);
2717 if (MINI_WINDOW_P (w
))
2720 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
2721 || !NILP (w
->next
) || !NILP (w
->prev
)
2722 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
2729 /* Return the number of columns in W.
2730 Don't count columns occupied by scroll bars or the vertical bar
2731 separating W from the sibling to its right. */
2733 window_internal_width (w
)
2736 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
2737 int width
= XINT (w
->width
);
2739 /* Scroll bars occupy a few columns. */
2740 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2741 return width
- FRAME_SCROLL_BAR_COLS (f
);
2743 /* The column of `|' characters separating side-by-side windows
2744 occupies one column only. */
2745 if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
2752 /* Scroll contents of window WINDOW up N lines.
2753 If WHOLE is nonzero, it means scroll N screenfuls instead. */
2756 window_scroll (window
, n
, whole
, noerror
)
2762 register struct window
*w
= XWINDOW (window
);
2763 register int opoint
= PT
;
2765 register int ht
= window_internal_height (w
);
2766 register Lisp_Object tem
;
2768 Lisp_Object bolp
, nmoved
;
2770 struct position posit
;
2773 startpos
= marker_position (w
->start
);
2775 posit
= *compute_motion (startpos
, 0, 0, 0,
2777 window_internal_width (w
), XINT (w
->hscroll
),
2779 original_vpos
= posit
.vpos
;
2781 XSETFASTINT (tem
, PT
);
2782 tem
= Fpos_visible_in_window_p (tem
, window
);
2786 Fvertical_motion (make_number (- (ht
/ 2)), window
);
2791 lose
= n
< 0 && PT
== BEGV
;
2792 Fvertical_motion (make_number (n
), window
);
2802 Fsignal (Qbeginning_of_buffer
, Qnil
);
2807 int this_scroll_margin
= scroll_margin
;
2809 /* Don't use a scroll margin that is negative or too large. */
2810 if (this_scroll_margin
< 0)
2811 this_scroll_margin
= 0;
2813 if (XINT (w
->height
) < 4 * scroll_margin
)
2814 this_scroll_margin
= XINT (w
->height
) / 4;
2816 set_marker_restricted (w
->start
, make_number (pos
), w
->buffer
);
2817 w
->start_at_line_beg
= bolp
;
2818 w
->update_mode_line
= Qt
;
2819 XSETFASTINT (w
->last_modified
, 0);
2820 XSETFASTINT (w
->last_overlay_modified
, 0);
2821 /* Set force_start so that redisplay_window will run
2822 the window-scroll-functions. */
2823 w
->force_start
= Qt
;
2825 if (whole
&& scroll_preserve_screen_position
)
2828 Fvertical_motion (make_number (original_vpos
), window
);
2830 /* If we scrolled forward, put point enough lines down
2831 that it is outside the scroll margin. */
2836 if (this_scroll_margin
> 0)
2839 Fvertical_motion (make_number (this_scroll_margin
), window
);
2845 if (top_margin
<= opoint
)
2847 else if (scroll_preserve_screen_position
)
2850 Fvertical_motion (make_number (original_vpos
), window
);
2853 SET_PT (top_margin
);
2859 /* If we scrolled backward, put point near the end of the window
2860 but not within the scroll margin. */
2862 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
2863 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
2866 bottom_margin
= PT
+ 1;
2868 if (bottom_margin
> opoint
)
2872 if (scroll_preserve_screen_position
)
2875 Fvertical_motion (make_number (original_vpos
), window
);
2878 Fvertical_motion (make_number (-1), window
);
2887 Fsignal (Qend_of_buffer
, Qnil
);
2891 /* This is the guts of Fscroll_up and Fscroll_down. */
2894 scroll_command (n
, direction
)
2895 register Lisp_Object n
;
2898 register int defalt
;
2899 int count
= specpdl_ptr
- specpdl
;
2901 /* If selected window's buffer isn't current, make it current for the moment.
2902 But don't screw up if window_scroll gets an error. */
2903 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
2905 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2906 Fset_buffer (XWINDOW (selected_window
)->buffer
);
2909 defalt
= (window_internal_height (XWINDOW (selected_window
))
2910 - next_screen_context_lines
);
2911 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
2914 window_scroll (selected_window
, defalt
, 1, 0);
2915 else if (EQ (n
, Qminus
))
2916 window_scroll (selected_window
, - defalt
, 1, 0);
2919 n
= Fprefix_numeric_value (n
);
2920 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
2923 unbind_to (count
, Qnil
);
2926 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
2927 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
2928 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2929 Negative ARG means scroll downward.\n\
2930 When calling from a program, supply a number as argument or nil.")
2934 scroll_command (arg
, 1);
2938 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
2939 "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\
2940 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2941 Negative ARG means scroll upward.\n\
2942 When calling from a program, supply a number as argument or nil.")
2946 scroll_command (arg
, -1);
2950 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
2951 "Return the other window for \"other window scroll\" commands.\n\
2952 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
2953 specifies the window.\n\
2954 If `other-window-scroll-buffer' is non-nil, a window\n\
2955 showing that buffer is used.")
2960 if (MINI_WINDOW_P (XWINDOW (selected_window
))
2961 && !NILP (Vminibuf_scroll_window
))
2962 window
= Vminibuf_scroll_window
;
2963 /* If buffer is specified, scroll that buffer. */
2964 else if (!NILP (Vother_window_scroll_buffer
))
2966 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
2968 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
);
2972 /* Nothing specified; look for a neighboring window on the same
2974 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
2976 if (EQ (window
, selected_window
))
2977 /* That didn't get us anywhere; look for a window on another
2980 window
= Fnext_window (window
, Qnil
, Qt
);
2981 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
2982 && ! EQ (window
, selected_window
));
2985 CHECK_LIVE_WINDOW (window
, 0);
2987 if (EQ (window
, selected_window
))
2988 error ("There is no other window");
2993 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
2994 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
2995 The next window is the one below the current one; or the one at the top\n\
2996 if the current one is at the bottom. Negative ARG means scroll downward.\n\
2997 When calling from a program, supply a number as argument or nil.\n\
2999 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
3000 specifies the window to scroll.\n\
3001 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
3002 showing that buffer, popping the buffer up if necessary.")
3004 register Lisp_Object arg
;
3006 register Lisp_Object window
;
3007 register int defalt
;
3008 register struct window
*w
;
3009 register int count
= specpdl_ptr
- specpdl
;
3011 window
= Fother_window_for_scrolling ();
3013 w
= XWINDOW (window
);
3014 defalt
= window_internal_height (w
) - next_screen_context_lines
;
3015 if (defalt
< 1) defalt
= 1;
3017 /* Don't screw up if window_scroll gets an error. */
3018 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
3020 Fset_buffer (w
->buffer
);
3021 SET_PT (marker_position (w
->pointm
));
3024 window_scroll (window
, defalt
, 1, 1);
3025 else if (EQ (arg
, Qminus
))
3026 window_scroll (window
, -defalt
, 1, 1);
3031 CHECK_NUMBER (arg
, 0);
3032 window_scroll (window
, XINT (arg
), 0, 1);
3035 Fset_marker (w
->pointm
, make_number (PT
), Qnil
);
3036 unbind_to (count
, Qnil
);
3041 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
3042 "Scroll selected window display ARG columns left.\n\
3043 Default for ARG is window width minus 2.")
3045 register Lisp_Object arg
;
3049 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
3051 arg
= Fprefix_numeric_value (arg
);
3054 Fset_window_hscroll (selected_window
,
3055 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
3059 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
3060 "Scroll selected window display ARG columns right.\n\
3061 Default for ARG is window width minus 2.")
3063 register Lisp_Object arg
;
3066 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
3068 arg
= Fprefix_numeric_value (arg
);
3071 Fset_window_hscroll (selected_window
,
3072 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
3076 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
3077 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
3078 The desired position of point is always relative to the current window.\n\
3079 Just C-u as prefix means put point in the center of the window.\n\
3080 If ARG is omitted or nil, erases the entire frame and then\n\
3081 redraws with point in the center of the current window.")
3083 register Lisp_Object arg
;
3085 register struct window
*w
= XWINDOW (selected_window
);
3086 register int ht
= window_internal_height (w
);
3087 struct position pos
;
3091 extern int frame_garbaged
;
3093 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
3094 XSETFASTINT (arg
, ht
/ 2);
3096 else if (CONSP (arg
)) /* Just C-u. */
3098 XSETFASTINT (arg
, ht
/ 2);
3102 arg
= Fprefix_numeric_value (arg
);
3103 CHECK_NUMBER (arg
, 0);
3107 XSETINT (arg
, XINT (arg
) + ht
);
3109 pos
= *vmotion (PT
, - XINT (arg
), w
);
3111 Fset_marker (w
->start
, make_number (pos
.bufpos
), w
->buffer
);
3112 w
->start_at_line_beg
= ((pos
.bufpos
== BEGV
3113 || FETCH_BYTE (pos
.bufpos
- 1) == '\n')
3115 w
->force_start
= Qt
;
3120 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
3122 "Position point relative to window.\n\
3123 With no argument, position point at center of window.\n\
3124 An argument specifies frame line; zero means top of window,\n\
3125 negative means relative to bottom of window.")
3127 register Lisp_Object arg
;
3129 register struct window
*w
= XWINDOW (selected_window
);
3130 register int height
= window_internal_height (w
);
3135 XSETFASTINT (arg
, height
/ 2);
3138 arg
= Fprefix_numeric_value (arg
);
3140 XSETINT (arg
, XINT (arg
) + height
);
3143 start
= marker_position (w
->start
);
3144 XSETWINDOW (window
, w
);
3145 if (start
< BEGV
|| start
> ZV
)
3147 Fvertical_motion (make_number (- (height
/ 2)), window
);
3148 Fset_marker (w
->start
, make_number (PT
), w
->buffer
);
3149 w
->start_at_line_beg
= Fbolp ();
3150 w
->force_start
= Qt
;
3155 return Fvertical_motion (arg
, window
);
3158 struct save_window_data
3160 EMACS_INT size_from_Lisp_Vector_struct
;
3161 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
3162 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
3163 Lisp_Object selected_frame
;
3164 Lisp_Object current_window
;
3165 Lisp_Object current_buffer
;
3166 Lisp_Object minibuf_scroll_window
;
3167 Lisp_Object root_window
;
3168 Lisp_Object focus_frame
;
3169 /* Record the values of window-min-width and window-min-height
3170 so that window sizes remain consistent with them. */
3171 Lisp_Object min_width
, min_height
;
3172 /* A vector, interpreted as a struct saved_window */
3173 Lisp_Object saved_windows
;
3176 /* This is saved as a Lisp_Vector */
3179 /* these first two must agree with struct Lisp_Vector in lisp.h */
3180 EMACS_INT size_from_Lisp_Vector_struct
;
3181 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
3184 Lisp_Object buffer
, start
, pointm
, mark
;
3185 Lisp_Object left
, top
, width
, height
, hscroll
;
3186 Lisp_Object parent
, prev
;
3187 Lisp_Object start_at_line_beg
;
3188 Lisp_Object display_table
;
3190 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
3192 #define SAVED_WINDOW_N(swv,n) \
3193 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
3195 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
3196 "T if OBJECT is a window-configuration object.")
3200 if (WINDOW_CONFIGURATIONP (object
))
3206 DEFUN ("set-window-configuration", Fset_window_configuration
,
3207 Sset_window_configuration
, 1, 1, 0,
3208 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
3209 CONFIGURATION must be a value previously returned\n\
3210 by `current-window-configuration' (which see).")
3212 Lisp_Object configuration
;
3214 register struct save_window_data
*data
;
3215 struct Lisp_Vector
*saved_windows
;
3216 Lisp_Object new_current_buffer
;
3221 while (!WINDOW_CONFIGURATIONP (configuration
))
3223 configuration
= wrong_type_argument (intern ("window-configuration-p"),
3227 data
= (struct save_window_data
*) XVECTOR (configuration
);
3228 saved_windows
= XVECTOR (data
->saved_windows
);
3230 new_current_buffer
= data
->current_buffer
;
3231 if (NILP (XBUFFER (new_current_buffer
)->name
))
3232 new_current_buffer
= Qnil
;
3235 if (XBUFFER (new_current_buffer
) == current_buffer
)
3239 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
3242 /* If f is a dead frame, don't bother rebuilding its window tree.
3243 However, there is other stuff we should still try to do below. */
3244 if (FRAME_LIVE_P (f
))
3246 register struct window
*w
;
3247 register struct saved_window
*p
;
3250 /* If the frame has been resized since this window configuration was
3251 made, we change the frame to the size specified in the
3252 configuration, restore the configuration, and then resize it
3253 back. We keep track of the prevailing height in these variables. */
3254 int previous_frame_height
= FRAME_HEIGHT (f
);
3255 int previous_frame_width
= FRAME_WIDTH (f
);
3256 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
3258 /* The mouse highlighting code could get screwed up
3259 if it runs during this. */
3262 if (XFASTINT (data
->frame_height
) != previous_frame_height
3263 || XFASTINT (data
->frame_width
) != previous_frame_width
)
3264 change_frame_size (f
, data
->frame_height
, data
->frame_width
, 0, 0);
3265 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
3266 if (XFASTINT (data
->frame_menu_bar_lines
)
3267 != previous_frame_menu_bar_lines
)
3268 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, 0);
3271 windows_or_buffers_changed
++;
3272 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3274 /* Temporarily avoid any problems with windows that are smaller
3275 than they are supposed to be. */
3276 window_min_height
= 1;
3277 window_min_width
= 1;
3280 Mark all windows now on frame as "deleted".
3281 Restoring the new configuration "undeletes" any that are in it.
3283 Save their current buffers in their height fields, since we may
3284 need it later, if a buffer saved in the configuration is now
3286 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
3288 for (k
= 0; k
< saved_windows
->size
; k
++)
3290 p
= SAVED_WINDOW_N (saved_windows
, k
);
3291 w
= XWINDOW (p
->window
);
3294 if (!NILP (p
->parent
))
3295 w
->parent
= SAVED_WINDOW_N (saved_windows
,
3296 XFASTINT (p
->parent
))->window
;
3300 if (!NILP (p
->prev
))
3302 w
->prev
= SAVED_WINDOW_N (saved_windows
,
3303 XFASTINT (p
->prev
))->window
;
3304 XWINDOW (w
->prev
)->next
= p
->window
;
3309 if (!NILP (w
->parent
))
3311 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
3313 XWINDOW (w
->parent
)->vchild
= p
->window
;
3314 XWINDOW (w
->parent
)->hchild
= Qnil
;
3318 XWINDOW (w
->parent
)->hchild
= p
->window
;
3319 XWINDOW (w
->parent
)->vchild
= Qnil
;
3324 /* If we squirreled away the buffer in the window's height,
3326 if (BUFFERP (w
->height
))
3327 w
->buffer
= w
->height
;
3330 w
->width
= p
->width
;
3331 w
->height
= p
->height
;
3332 w
->hscroll
= p
->hscroll
;
3333 w
->display_table
= p
->display_table
;
3334 XSETFASTINT (w
->last_modified
, 0);
3335 XSETFASTINT (w
->last_overlay_modified
, 0);
3337 /* Reinstall the saved buffer and pointers into it. */
3338 if (NILP (p
->buffer
))
3339 w
->buffer
= p
->buffer
;
3342 if (!NILP (XBUFFER (p
->buffer
)->name
))
3343 /* If saved buffer is alive, install it. */
3345 w
->buffer
= p
->buffer
;
3346 w
->start_at_line_beg
= p
->start_at_line_beg
;
3347 set_marker_restricted (w
->start
,
3348 Fmarker_position (p
->start
),
3350 set_marker_restricted (w
->pointm
,
3351 Fmarker_position (p
->pointm
),
3353 Fset_marker (XBUFFER (w
->buffer
)->mark
,
3354 Fmarker_position (p
->mark
), w
->buffer
);
3356 /* As documented in Fcurrent_window_configuration, don't
3357 save the location of point in the buffer which was current
3358 when the window configuration was recorded. */
3359 if (!EQ (p
->buffer
, new_current_buffer
)
3360 && XBUFFER (p
->buffer
) == current_buffer
)
3361 Fgoto_char (w
->pointm
);
3363 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
3364 /* Else unless window has a live buffer, get one. */
3366 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
3367 /* This will set the markers to beginning of visible
3369 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
3370 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
3371 w
->start_at_line_beg
= Qt
;
3374 /* Keeping window's old buffer; make sure the markers
3377 /* Set window markers at start of visible range. */
3378 if (XMARKER (w
->start
)->buffer
== 0)
3379 set_marker_restricted (w
->start
, make_number (0),
3381 if (XMARKER (w
->pointm
)->buffer
== 0)
3382 set_marker_restricted (w
->pointm
,
3384 (BUF_PT (XBUFFER (w
->buffer
)))),
3386 w
->start_at_line_beg
= Qt
;
3391 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
3392 Fselect_window (data
->current_window
);
3393 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
3396 if (NILP (data
->focus_frame
)
3397 || (FRAMEP (data
->focus_frame
)
3398 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
3399 Fredirect_frame_focus (frame
, data
->focus_frame
);
3401 #if 0 /* I don't understand why this is needed, and it causes problems
3402 when the frame's old selected window has been deleted. */
3403 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
3404 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
3408 /* Set the screen height to the value it had before this function. */
3409 if (previous_frame_height
!= FRAME_HEIGHT (f
)
3410 || previous_frame_width
!= FRAME_WIDTH (f
))
3411 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
3413 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
3414 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
3415 x_set_menu_bar_lines (f
, previous_frame_menu_bar_lines
, 0);
3421 /* Restore the minimum heights recorded in the configuration. */
3422 window_min_height
= XINT (data
->min_height
);
3423 window_min_width
= XINT (data
->min_width
);
3425 /* Fselect_window will have made f the selected frame, so we
3426 reselect the proper frame here. Fhandle_switch_frame will change the
3427 selected window too, but that doesn't make the call to
3428 Fselect_window above totally superfluous; it still sets f's
3430 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
3431 do_switch_frame (data
->selected_frame
, Qnil
, 0);
3433 if (!NILP (new_current_buffer
))
3435 Fset_buffer (new_current_buffer
);
3437 /* If the buffer that is current now is the same
3438 that was current before setting the window configuration,
3439 don't alter its PT. */
3444 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
3446 if (! NILP (Vwindow_configuration_change_hook
)
3447 && ! NILP (Vrun_hooks
))
3448 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3453 /* Mark all windows now on frame as deleted
3454 by setting their buffers to nil. */
3457 delete_all_subwindows (w
)
3458 register struct window
*w
;
3460 if (!NILP (w
->next
))
3461 delete_all_subwindows (XWINDOW (w
->next
));
3462 if (!NILP (w
->vchild
))
3463 delete_all_subwindows (XWINDOW (w
->vchild
));
3464 if (!NILP (w
->hchild
))
3465 delete_all_subwindows (XWINDOW (w
->hchild
));
3467 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
3469 if (!NILP (w
->buffer
))
3472 /* We set all three of these fields to nil, to make sure that we can
3473 distinguish this dead window from any live window. Live leaf
3474 windows will have buffer set, and combination windows will have
3475 vchild or hchild set. */
3482 count_windows (window
)
3483 register struct window
*window
;
3485 register int count
= 1;
3486 if (!NILP (window
->next
))
3487 count
+= count_windows (XWINDOW (window
->next
));
3488 if (!NILP (window
->vchild
))
3489 count
+= count_windows (XWINDOW (window
->vchild
));
3490 if (!NILP (window
->hchild
))
3491 count
+= count_windows (XWINDOW (window
->hchild
));
3496 save_window_save (window
, vector
, i
)
3498 struct Lisp_Vector
*vector
;
3501 register struct saved_window
*p
;
3502 register struct window
*w
;
3503 register Lisp_Object tem
;
3505 for (;!NILP (window
); window
= w
->next
)
3507 p
= SAVED_WINDOW_N (vector
, i
);
3508 w
= XWINDOW (window
);
3510 XSETFASTINT (w
->temslot
, i
++);
3512 p
->buffer
= w
->buffer
;
3515 p
->width
= w
->width
;
3516 p
->height
= w
->height
;
3517 p
->hscroll
= w
->hscroll
;
3518 p
->display_table
= w
->display_table
;
3519 if (!NILP (w
->buffer
))
3521 /* Save w's value of point in the window configuration.
3522 If w is the selected window, then get the value of point
3523 from the buffer; pointm is garbage in the selected window. */
3524 if (EQ (window
, selected_window
))
3526 p
->pointm
= Fmake_marker ();
3527 Fset_marker (p
->pointm
,
3528 make_number (BUF_PT (XBUFFER (w
->buffer
))),
3532 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
3534 p
->start
= Fcopy_marker (w
->start
, Qnil
);
3535 p
->start_at_line_beg
= w
->start_at_line_beg
;
3537 tem
= XBUFFER (w
->buffer
)->mark
;
3538 p
->mark
= Fcopy_marker (tem
, Qnil
);
3545 p
->start_at_line_beg
= Qnil
;
3548 if (NILP (w
->parent
))
3551 p
->parent
= XWINDOW (w
->parent
)->temslot
;
3556 p
->prev
= XWINDOW (w
->prev
)->temslot
;
3558 if (!NILP (w
->vchild
))
3559 i
= save_window_save (w
->vchild
, vector
, i
);
3560 if (!NILP (w
->hchild
))
3561 i
= save_window_save (w
->hchild
, vector
, i
);
3567 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
3568 Scurrent_window_configuration
, 0, 1, 0,
3569 "Return an object representing the current window configuration of FRAME.\n\
3570 If FRAME is nil or omitted, use the selected frame.\n\
3571 This describes the number of windows, their sizes and current buffers,\n\
3572 and for each displayed buffer, where display starts, and the positions of\n\
3573 point and mark. An exception is made for point in the current buffer:\n\
3574 its value is -not- saved.\n\
3575 This also records the currently selected frame, and FRAME's focus\n\
3576 redirection (see `redirect-frame-focus').")
3580 register Lisp_Object tem
;
3581 register int n_windows
;
3582 register struct save_window_data
*data
;
3583 register struct Lisp_Vector
*vec
;
3591 CHECK_LIVE_FRAME (frame
, 0);
3595 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
3596 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
3597 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
3598 vec
->contents
[i
] = Qnil
;
3599 vec
->size
= VECSIZE (struct save_window_data
);
3600 data
= (struct save_window_data
*)vec
;
3602 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
3603 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
3604 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
3605 XSETFRAME (data
->selected_frame
, selected_frame
);
3606 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
3607 XSETBUFFER (data
->current_buffer
, current_buffer
);
3608 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
3609 data
->root_window
= FRAME_ROOT_WINDOW (f
);
3610 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
3611 XSETINT (data
->min_height
, window_min_height
);
3612 XSETINT (data
->min_width
, window_min_width
);
3613 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
3614 data
->saved_windows
= tem
;
3615 for (i
= 0; i
< n_windows
; i
++)
3616 XVECTOR (tem
)->contents
[i
]
3617 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
3618 save_window_save (FRAME_ROOT_WINDOW (f
),
3620 XSETWINDOW_CONFIGURATION (tem
, data
);
3624 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
3626 "Execute body, preserving window sizes and contents.\n\
3627 Restore which buffer appears in which window, where display starts,\n\
3628 and the value of point and mark for each window.\n\
3629 Also restore which buffer is current.\n\
3630 But do not preserve point in the current buffer.\n\
3631 Does not restore the value of point in current buffer.")
3635 register Lisp_Object val
;
3636 register int count
= specpdl_ptr
- specpdl
;
3638 record_unwind_protect (Fset_window_configuration
,
3639 Fcurrent_window_configuration (Qnil
));
3640 val
= Fprogn (args
);
3641 return unbind_to (count
, val
);
3646 selected_frame
= make_terminal_frame ();
3647 XSETFRAME (Vterminal_frame
, selected_frame
);
3648 minibuf_window
= selected_frame
->minibuffer_window
;
3649 selected_window
= selected_frame
->selected_window
;
3650 last_nonminibuf_frame
= selected_frame
;
3652 window_initialized
= 1;
3657 staticpro (&Qwindow_configuration_change_hook
);
3658 Qwindow_configuration_change_hook
3659 = intern ("window-configuration-change-hook");
3661 Qwindowp
= intern ("windowp");
3662 staticpro (&Qwindowp
);
3664 Qwindow_live_p
= intern ("window-live-p");
3665 staticpro (&Qwindow_live_p
);
3667 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
3668 staticpro (&Qtemp_buffer_show_hook
);
3670 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
3671 "Non-nil means call as function to display a help buffer.\n\
3672 The function is called with one argument, the buffer to be displayed.\n\
3673 Used by `with-output-to-temp-buffer'.\n\
3674 If this function is used, then it must do the entire job of showing\n\
3675 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
3676 Vtemp_buffer_show_function
= Qnil
;
3678 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
3679 "If non-nil, function to call to handle `display-buffer'.\n\
3680 It will receive two args, the buffer and a flag which if non-nil means\n\
3681 that the currently selected window is not acceptable.\n\
3682 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
3683 work using this function.");
3684 Vdisplay_buffer_function
= Qnil
;
3686 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
3687 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
3688 Vminibuf_scroll_window
= Qnil
;
3690 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
3691 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
3692 Vother_window_scroll_buffer
= Qnil
;
3694 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
3695 "*Non-nil means `display-buffer' should make a separate frame.");
3698 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
3699 "Function to call to handle automatic new frame creation.\n\
3700 It is called with no arguments and should return a newly created frame.\n\
3702 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
3703 where `pop-up-frame-alist' would hold the default frame parameters.");
3704 Vpop_up_frame_function
= Qnil
;
3706 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
3707 "*List of buffer names that should have their own special frames.\n\
3708 Displaying a buffer whose name is in this list makes a special frame for it\n\
3709 using `special-display-function'. See also `special-display-regexps'.\n\
3711 An element of the list can be a list instead of just a string.\n\
3712 There are two ways to use a list as an element:\n\
3713 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
3714 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
3715 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
3716 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
3717 All this is done by the function found in `special-display-function'.\n\
3719 If this variable appears \"not to work\", because you add a name to it\n\
3720 but that buffer still appears in the selected window, look at the\n\
3721 values of `same-window-buffer-names' and `same-window-regexps'.\n\
3722 Those variables take precedence over this one.");
3723 Vspecial_display_buffer_names
= Qnil
;
3725 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
3726 "*List of regexps saying which buffers should have their own special frames.\n\
3727 If a buffer name matches one of these regexps, it gets its own frame.\n\
3728 Displaying a buffer whose name is in this list makes a special frame for it\n\
3729 using `special-display-function'.\n\
3731 An element of the list can be a list instead of just a string.\n\
3732 There are two ways to use a list as an element:\n\
3733 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
3734 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
3735 In the latter case, FUNCTION is called with the buffer as first argument,\n\
3736 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
3737 All this is done by the function found in `special-display-function'.\n\
3739 If this variable appears \"not to work\", because you add a regexp to it\n\
3740 but the matching buffers still appear in the selected window, look at the\n\
3741 values of `same-window-buffer-names' and `same-window-regexps'.\n\
3742 Those variables take precedence over this one.");
3743 Vspecial_display_regexps
= Qnil
;
3745 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
3746 "Function to call to make a new frame for a special buffer.\n\
3747 It is called with two arguments, the buffer and optional buffer specific\n\
3748 data, and should return a window displaying that buffer.\n\
3749 The default value makes a separate frame for the buffer,\n\
3750 using `special-display-frame-alist' to specify the frame parameters.\n\
3752 A buffer is special if its is listed in `special-display-buffer-names'\n\
3753 or matches a regexp in `special-display-regexps'.");
3754 Vspecial_display_function
= Qnil
;
3756 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
3757 "*List of buffer names that should appear in the selected window.\n\
3758 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
3759 switches to it in the selected window, rather than making it appear\n\
3760 in some other window.\n\
3762 An element of the list can be a cons cell instead of just a string.\n\
3763 Then the car must be a string, which specifies the buffer name.\n\
3764 This is for compatibility with `special-display-buffer-names';\n\
3765 the cdr of the cons cell is ignored.\n\
3767 See also `same-window-regexps'.");
3768 Vsame_window_buffer_names
= Qnil
;
3770 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
3771 "*List of regexps saying which buffers should appear in the selected window.\n\
3772 If a buffer name matches one of these regexps, then displaying it\n\
3773 using `display-buffer' or `pop-to-buffer' switches to it\n\
3774 in the selected window, rather than making it appear in some other window.\n\
3776 An element of the list can be a cons cell instead of just a string.\n\
3777 Then the car must be a string, which specifies the buffer name.\n\
3778 This is for compatibility with `special-display-buffer-names';\n\
3779 the cdr of the cons cell is ignored.\n\
3781 See also `same-window-buffer-names'.");
3782 Vsame_window_regexps
= Qnil
;
3784 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
3785 "*Non-nil means display-buffer should make new windows.");
3788 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
3789 "*Number of lines of continuity when scrolling by screenfuls.");
3790 next_screen_context_lines
= 2;
3792 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
3793 "*display-buffer would prefer to split the largest window if this large.\n\
3794 If there is only one window, it is split regardless of this value.");
3795 split_height_threshold
= 500;
3797 DEFVAR_INT ("window-min-height", &window_min_height
,
3798 "*Delete any window less than this tall (including its mode line).");
3799 window_min_height
= 4;
3801 DEFVAR_INT ("window-min-width", &window_min_width
,
3802 "*Delete any window less than this wide.");
3803 window_min_width
= 10;
3805 DEFVAR_BOOL ("scroll-preserve-screen-position",
3806 &scroll_preserve_screen_position
,
3807 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
3808 scroll_preserve_screen_position
= 0;
3810 DEFVAR_LISP ("window-configuration-change-hook",
3811 &Vwindow_configuration_change_hook
,
3812 "Functions to call when window configuration changes.\n\
3813 The selected frame is the one whose configuration has changed.");
3814 Vwindow_configuration_change_hook
= Qnil
;
3816 defsubr (&Sselected_window
);
3817 defsubr (&Sminibuffer_window
);
3818 defsubr (&Swindow_minibuffer_p
);
3819 defsubr (&Swindowp
);
3820 defsubr (&Swindow_live_p
);
3821 defsubr (&Spos_visible_in_window_p
);
3822 defsubr (&Swindow_buffer
);
3823 defsubr (&Swindow_height
);
3824 defsubr (&Swindow_width
);
3825 defsubr (&Swindow_hscroll
);
3826 defsubr (&Sset_window_hscroll
);
3827 defsubr (&Swindow_redisplay_end_trigger
);
3828 defsubr (&Sset_window_redisplay_end_trigger
);
3829 defsubr (&Swindow_edges
);
3830 defsubr (&Scoordinates_in_window_p
);
3831 defsubr (&Swindow_at
);
3832 defsubr (&Swindow_point
);
3833 defsubr (&Swindow_start
);
3834 defsubr (&Swindow_end
);
3835 defsubr (&Sset_window_point
);
3836 defsubr (&Sset_window_start
);
3837 defsubr (&Swindow_dedicated_p
);
3838 defsubr (&Sset_window_dedicated_p
);
3839 defsubr (&Swindow_display_table
);
3840 defsubr (&Sset_window_display_table
);
3841 defsubr (&Snext_window
);
3842 defsubr (&Sprevious_window
);
3843 defsubr (&Sother_window
);
3844 defsubr (&Sget_lru_window
);
3845 defsubr (&Sget_largest_window
);
3846 defsubr (&Sget_buffer_window
);
3847 defsubr (&Sdelete_other_windows
);
3848 defsubr (&Sdelete_windows_on
);
3849 defsubr (&Sreplace_buffer_in_windows
);
3850 defsubr (&Sdelete_window
);
3851 defsubr (&Sset_window_buffer
);
3852 defsubr (&Sselect_window
);
3853 defsubr (&Sspecial_display_p
);
3854 defsubr (&Ssame_window_p
);
3855 defsubr (&Sdisplay_buffer
);
3856 defsubr (&Ssplit_window
);
3857 defsubr (&Senlarge_window
);
3858 defsubr (&Sshrink_window
);
3859 defsubr (&Sscroll_up
);
3860 defsubr (&Sscroll_down
);
3861 defsubr (&Sscroll_left
);
3862 defsubr (&Sscroll_right
);
3863 defsubr (&Sother_window_for_scrolling
);
3864 defsubr (&Sscroll_other_window
);
3865 defsubr (&Srecenter
);
3866 defsubr (&Smove_to_window_line
);
3867 defsubr (&Swindow_configuration_p
);
3868 defsubr (&Sset_window_configuration
);
3869 defsubr (&Scurrent_window_configuration
);
3870 defsubr (&Ssave_window_excursion
);
3875 initial_define_key (control_x_map
, '1', "delete-other-windows");
3876 initial_define_key (control_x_map
, '2', "split-window");
3877 initial_define_key (control_x_map
, '0', "delete-window");
3878 initial_define_key (control_x_map
, 'o', "other-window");
3879 initial_define_key (control_x_map
, '^', "enlarge-window");
3880 initial_define_key (control_x_map
, '<', "scroll-left");
3881 initial_define_key (control_x_map
, '>', "scroll-right");
3883 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
3884 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
3885 initial_define_key (meta_map
, 'v', "scroll-down");
3887 initial_define_key (global_map
, Ctl('L'), "recenter");
3888 initial_define_key (meta_map
, 'r', "move-to-window-line");