1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985, 1986, 1987, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
32 Lisp_Object Qwindowp
, Qwindow_live_p
;
34 Lisp_Object
Fnext_window (), Fdelete_window (), Fselect_window ();
35 Lisp_Object
Fset_window_buffer (), Fsplit_window (), Frecenter ();
37 void delete_all_subwindows ();
38 static struct window
*decode_window();
40 /* This is the window in which the terminal's cursor should
41 be left when nothing is being done with it. This must
42 always be a leaf window, and its buffer is selected by
43 the top level editing loop at the end of each command.
45 This value is always the same as
46 FRAME_SELECTED_WINDOW (selected_frame). */
48 Lisp_Object selected_window
;
50 /* The minibuffer window of the selected frame.
51 Note that you cannot test for minibufferness of an arbitrary window
52 by comparing against this; but you can test for minibufferness of
53 the selected window. */
54 Lisp_Object minibuf_window
;
56 /* Non-nil means it is the window for C-M-v to scroll
57 when the minibuffer is selected. */
58 Lisp_Object Vminibuf_scroll_window
;
60 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
61 Lisp_Object Vother_window_scroll_buffer
;
63 /* Non-nil means it's function to call to display temp buffers. */
64 Lisp_Object Vtemp_buffer_show_function
;
66 /* If a window gets smaller than either of these, it is removed. */
67 int window_min_height
;
70 /* Nonzero implies Fdisplay_buffer should create windows. */
73 /* Nonzero implies make new frames for Fdisplay_buffer. */
76 /* Non-nil means use this function instead of default */
77 Lisp_Object Vpop_up_frame_function
;
79 /* Function to call to handle Fdisplay_buffer. */
80 Lisp_Object Vdisplay_buffer_function
;
82 /* List of buffer *names* for buffers that should have their own frames. */
83 Lisp_Object Vspecial_display_buffer_names
;
85 /* List of regexps for buffer names that should have their own frames. */
86 Lisp_Object Vspecial_display_regexps
;
88 /* Function to pop up a special frame. */
89 Lisp_Object Vspecial_display_function
;
91 /* Fdisplay_buffer always splits the largest window
92 if that window is more than this high. */
93 int split_height_threshold
;
95 /* Number of lines of continuity in scrolling by screenfuls. */
96 int next_screen_context_lines
;
98 /* Incremented for each window created. */
99 static int sequence_number
;
101 #define min(a, b) ((a) < (b) ? (a) : (b))
103 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
104 "Returns t if OBJ is a window.")
108 return XTYPE (obj
) == Lisp_Window
? Qt
: Qnil
;
111 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
112 "Returns t if OBJ is a window which is currently visible.")
116 return ((XTYPE (obj
) == Lisp_Window
117 && ! NILP (XWINDOW (obj
)->buffer
))
124 register Lisp_Object val
;
125 register struct window
*p
;
127 /* Add sizeof (Lisp_Object) here because sizeof (struct Lisp_Vector)
128 includes the first element. */
130 make_number ((sizeof (struct window
) - sizeof (struct Lisp_Vector
)
131 + sizeof (Lisp_Object
))
132 / sizeof (Lisp_Object
)),
134 XSETTYPE (val
, Lisp_Window
);
136 XFASTINT (p
->sequence_number
) = ++sequence_number
;
137 XFASTINT (p
->left
) = XFASTINT (p
->top
)
138 = XFASTINT (p
->height
) = XFASTINT (p
->width
)
139 = XFASTINT (p
->hscroll
) = 0;
140 XFASTINT (p
->last_point_x
) = XFASTINT (p
->last_point_y
) = 0;
141 p
->start
= Fmake_marker ();
142 p
->pointm
= Fmake_marker ();
143 XFASTINT (p
->use_time
) = 0;
145 p
->display_table
= Qnil
;
150 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
151 "Return the window that the cursor now appears in and commands apply to.")
154 return selected_window
;
157 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
158 "Return the window used now for minibuffers.\n\
159 If the optional argument FRAME is specified, return the minibuffer window\n\
160 used by that frame.")
166 XSET (frame
, Lisp_Frame
, selected_frame
);
168 CHECK_LIVE_FRAME (frame
, 0);
171 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
174 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
175 "Returns non-nil if WINDOW is a minibuffer window.")
179 struct window
*w
= decode_window (window
);
180 return (MINI_WINDOW_P (w
) ? Qt
: Qnil
);
183 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
184 Spos_visible_in_window_p
, 0, 2, 0,
185 "Return t if position POS is currently on the frame in WINDOW.\n\
186 Returns nil if that position is scrolled vertically out of view.\n\
187 POS defaults to point; WINDOW, to the selected window.")
189 Lisp_Object pos
, window
;
191 register struct window
*w
;
195 register struct buffer
*buf
;
196 struct position posval
;
203 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
207 w
= decode_window (window
);
208 top
= marker_position (w
->start
);
209 hscroll
= XINT (w
->hscroll
);
214 height
= XFASTINT (w
->height
) - ! MINI_WINDOW_P (w
);
216 buf
= XBUFFER (w
->buffer
);
217 if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
))
219 /* If frame is up to date,
220 use the info recorded about how much text fit on it. */
221 if (posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
)
222 || (XFASTINT (w
->window_end_vpos
) < height
))
228 if (posint
> BUF_ZV (buf
))
231 /* If that info is not correct, calculate afresh */
232 posval
= *compute_motion (top
, 0, (hscroll
? 1 - hscroll
: 0),
234 window_internal_width (w
) - 1,
237 return posval
.vpos
< height
? Qt
: Qnil
;
241 static struct window
*
242 decode_window (window
)
243 register Lisp_Object window
;
246 return XWINDOW (selected_window
);
248 CHECK_LIVE_WINDOW (window
, 0);
249 return XWINDOW (window
);
252 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
253 "Return the buffer that WINDOW is displaying.")
257 return decode_window (window
)->buffer
;
260 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
261 "Return the number of lines in WINDOW (including its mode line).")
265 return decode_window (window
)->height
;
268 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
269 "Return the number of display columns in WINDOW.\n\
270 This is the width that is usable columns available for text in WINDOW.\n\
271 If you want to find out how many columns WINDOW takes up,\n\
272 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
276 return make_number (window_internal_width (decode_window (window
)));
279 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
280 "Return the number of columns by which WINDOW is scrolled from left margin.")
284 return decode_window (window
)->hscroll
;
287 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
288 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
289 NCOL should be zero or positive.")
291 register Lisp_Object window
, ncol
;
293 register struct window
*w
;
295 CHECK_NUMBER (ncol
, 1);
296 if (XINT (ncol
) < 0) XFASTINT (ncol
) = 0;
297 if (XFASTINT (ncol
) >= (1 << (SHORTBITS
- 1)))
298 args_out_of_range (ncol
, Qnil
);
299 w
= decode_window (window
);
300 if (XINT (w
->hscroll
) != XINT (ncol
))
301 clip_changed
= 1; /* Prevent redisplay shortcuts */
306 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
307 "Return a list of the edge coordinates of WINDOW.\n\
308 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
309 RIGHT is one more than the rightmost column used by WINDOW,\n\
310 and BOTTOM is one more than the bottommost row used by WINDOW\n\
315 register struct window
*w
= decode_window (window
);
317 return Fcons (w
->left
, Fcons (w
->top
,
318 Fcons (make_number (XFASTINT (w
->left
) + XFASTINT (w
->width
)),
319 Fcons (make_number (XFASTINT (w
->top
)
320 + XFASTINT (w
->height
)),
324 /* Test if the character at column *x, row *y is within window *w.
325 If it is not, return 0;
326 if it is in the window's text area,
327 set *x and *y to its location relative to the upper left corner
330 if it is on the window's modeline, return 2;
331 if it is on the border between the window and its right sibling,
334 coordinates_in_window (w
, x
, y
)
335 register struct window
*w
;
338 register int left
= XINT (w
->left
);
339 register int width
= XINT (w
->width
);
340 register int window_height
= XINT (w
->height
);
341 register int top
= XFASTINT (w
->top
);
343 if ( *x
< left
|| *x
>= left
+ width
344 || *y
< top
|| *y
>= top
+ window_height
)
347 /* Is the character is the mode line? */
348 if (*y
== top
+ window_height
- 1
349 && ! MINI_WINDOW_P (w
))
352 /* Is the character in the right border? */
353 if (*x
== left
+ width
- 1
354 && left
+ width
!= FRAME_WIDTH (XFRAME (w
->frame
)))
362 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
363 Scoordinates_in_window_p
, 2, 2, 0,
364 "Return non-nil if COORDINATES are in WINDOW.\n\
365 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
366 measured in characters from the upper-left corner of the frame.\n\
367 (0 . 0) denotes the character in the upper left corner of the\n\
369 If COORDINATES are in the text portion of WINDOW,\n\
370 the coordinates relative to the window are returned.\n\
371 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
372 If they are on the border between WINDOW and its right sibling,\n\
373 `vertical-line' is returned.")
374 (coordinates
, window
)
375 register Lisp_Object coordinates
, window
;
379 CHECK_LIVE_WINDOW (window
, 0);
380 CHECK_CONS (coordinates
, 1);
381 x
= XINT (Fcar (coordinates
));
382 y
= XINT (Fcdr (coordinates
));
384 switch (coordinates_in_window (XWINDOW (window
), &x
, &y
))
386 case 0: /* NOT in window at all. */
389 case 1: /* In text part of window. */
392 case 2: /* In mode line of window. */
395 case 3: /* On right border of window. */
396 return Qvertical_line
;
403 /* Find the window containing column x, row y, and return it as a
404 Lisp_Object. If x, y is on the window's modeline, set *part
405 to 1; if it is on the separating line between the window and its
406 right sibling, set it to 2; otherwise set it to 0. If there is no
407 window under x, y return nil and leave *part unmodified. */
409 window_from_coordinates (frame
, x
, y
, part
)
414 register Lisp_Object tem
, first
;
416 tem
= first
= FRAME_SELECTED_WINDOW (frame
);
420 int found
= coordinates_in_window (XWINDOW (tem
), &x
, &y
);
428 tem
= Fnext_window (tem
, Qt
, Qlambda
);
430 while (! EQ (tem
, first
));
435 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
436 "Return window containing coordinates X and Y on FRAME.\n\
437 If omitted, FRAME defaults to the currently selected frame.\n\
438 The top left corner of the frame is considered to be row 0,\n\
441 Lisp_Object x
, y
, frame
;
447 XSET (frame
, Lisp_Frame
, selected_frame
);
449 CHECK_LIVE_FRAME (frame
, 2);
454 return window_from_coordinates (XFRAME (frame
),
459 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
460 "Return current value of point in WINDOW.\n\
461 For a nonselected window, this is the value point would have\n\
462 if that window were selected.\n\
464 Note that, when WINDOW is the selected window and its buffer\n\
465 is also currently selected, the value returned is the same as (point).\n\
466 It would be more strictly correct to return the `top-level' value\n\
467 of point, outside of any save-excursion forms.\n\
468 But that is hard to define.")
472 register struct window
*w
= decode_window (window
);
474 if (w
== XWINDOW (selected_window
)
475 && current_buffer
== XBUFFER (w
->buffer
))
477 return Fmarker_position (w
->pointm
);
480 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
481 "Return position at which display currently starts in WINDOW.")
485 return Fmarker_position (decode_window (window
)->start
);
488 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 1, 0,
489 "Return position at which display currently ends in WINDOW.")
494 struct window
*w
= decode_window (window
);
498 CHECK_BUFFER (buf
, 0);
500 XSET (value
, Lisp_Int
,
501 BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
506 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
507 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
509 Lisp_Object window
, pos
;
511 register struct window
*w
= decode_window (window
);
513 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
514 if (w
== XWINDOW (selected_window
))
517 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
522 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
523 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
524 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
525 from overriding motion of point in order to display at this exact start.")
526 (window
, pos
, noforce
)
527 Lisp_Object window
, pos
, noforce
;
529 register struct window
*w
= decode_window (window
);
531 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
532 set_marker_restricted (w
->start
, pos
, w
->buffer
);
533 /* this is not right, but much easier than doing what is right. */
534 w
->start_at_line_beg
= Qnil
;
537 w
->update_mode_line
= Qt
;
538 XFASTINT (w
->last_modified
) = 0;
539 if (!EQ (window
, selected_window
))
540 windows_or_buffers_changed
++;
544 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
546 "Return WINDOW's dedicated object, usually t or nil.\n\
547 See also `set-window-dedicated-p'.")
551 return decode_window (window
)->dedicated
;
554 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
555 Sset_window_dedicated_p
, 2, 2, 0,
556 "Control whether WINDOW is dedicated to the buffer it displays.\n\
557 If it is dedicated, Emacs will not automatically change\n\
558 which buffer appears in it.\n\
559 The second argument is the new value for the dedication flag;\n\
562 Lisp_Object window
, arg
;
564 register struct window
*w
= decode_window (window
);
574 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
576 "Return the display-table that WINDOW is using.")
580 return decode_window (window
)->display_table
;
583 /* Get the display table for use currently on window W.
584 This is either W's display table or W's buffer's display table.
585 Ignore the specified tables if they are not valid;
586 if no valid table is specified, return 0. */
589 window_display_table (w
)
593 tem
= w
->display_table
;
594 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
595 return XVECTOR (tem
);
596 tem
= XBUFFER (w
->buffer
)->display_table
;
597 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
598 return XVECTOR (tem
);
599 tem
= Vstandard_display_table
;
600 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
601 return XVECTOR (tem
);
605 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
606 "Set WINDOW's display-table to TABLE.")
608 register Lisp_Object window
, table
;
610 register struct window
*w
;
611 register Lisp_Object z
; /* Return value. */
613 w
= decode_window (window
);
614 w
->display_table
= table
;
618 /* Record info on buffer window w is displaying
619 when it is about to cease to display that buffer. */
622 register struct window
*w
;
627 if (XBUFFER (buf
) != XMARKER (w
->pointm
)->buffer
)
631 if (w
== XWINDOW (selected_window
)
632 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
633 /* Do this except when the selected window's buffer
634 is being removed from some other window. */
636 /* last_window_start records the start position that this buffer
637 had in the last window to be disconnected from it.
638 Now that this statement is unconditional,
639 it is possible for the buffer to be displayed in the
640 selected window, while last_window_start reflects another
641 window which was recently showing the same buffer.
642 Some people might say that might be a good thing. Let's see. */
643 XBUFFER (buf
)->last_window_start
= marker_position (w
->start
);
645 /* Point in the selected window's buffer
646 is actually stored in that buffer, and the window's pointm isn't used.
647 So don't clobber point in that buffer. */
648 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
))
649 BUF_PT (XBUFFER (buf
))
650 = clip_to_bounds (BUF_BEGV (XBUFFER (buf
)),
651 marker_position (w
->pointm
),
652 BUF_ZV (XBUFFER (buf
)));
655 /* Put replacement into the window structure in place of old. */
657 replace_window (old
, replacement
)
658 Lisp_Object old
, replacement
;
660 register Lisp_Object tem
;
661 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
663 /* If OLD is its frame's root_window, then replacement is the new
664 root_window for that frame. */
666 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
667 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
672 p
->height
= o
->height
;
674 p
->next
= tem
= o
->next
;
676 XWINDOW (tem
)->prev
= replacement
;
678 p
->prev
= tem
= o
->prev
;
680 XWINDOW (tem
)->next
= replacement
;
682 p
->parent
= tem
= o
->parent
;
685 if (EQ (XWINDOW (tem
)->vchild
, old
))
686 XWINDOW (tem
)->vchild
= replacement
;
687 if (EQ (XWINDOW (tem
)->hchild
, old
))
688 XWINDOW (tem
)->hchild
= replacement
;
691 /*** Here, if replacement is a vertical combination
692 and so is its new parent, we should make replacement's
693 children be children of that parent instead. ***/
696 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
697 "Remove WINDOW from the display. Default is selected window.")
699 register Lisp_Object window
;
701 register Lisp_Object tem
, parent
, sib
;
702 register struct window
*p
;
703 register struct window
*par
;
705 /* Because this function is called by other C code on non-leaf
706 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
707 so we can't decode_window here. */
709 window
= selected_window
;
711 CHECK_WINDOW (window
, 0);
712 p
= XWINDOW (window
);
714 /* It's okay to delete an already-deleted window. */
722 error ("Attempt to delete minibuffer or sole ordinary window");
723 par
= XWINDOW (parent
);
725 windows_or_buffers_changed
++;
727 /* Are we trying to delete any frame's selected window? */
729 Lisp_Object frame
, pwindow
;
731 /* See if the frame's selected window is either WINDOW
732 or any subwindow of it, by finding all that window's parents
733 and comparing each one with WINDOW. */
734 frame
= WINDOW_FRAME (XWINDOW (window
));
735 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
737 while (!NILP (pwindow
))
739 if (EQ (window
, pwindow
))
741 pwindow
= XWINDOW (pwindow
)->parent
;
744 if (EQ (window
, pwindow
))
746 Lisp_Object alternative
;
747 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
749 /* If we're about to delete the selected window on the
750 selected frame, then we should use Fselect_window to select
751 the new window. On the other hand, if we're about to
752 delete the selected window on any other frame, we shouldn't do
753 anything but set the frame's selected_window slot. */
754 if (EQ (window
, selected_window
))
755 Fselect_window (alternative
);
757 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
762 /* tem is null for dummy parent windows
763 (which have inferiors but not any contents themselves) */
767 unchain_marker (p
->pointm
);
768 unchain_marker (p
->start
);
773 XWINDOW (tem
)->prev
= p
->prev
;
777 XWINDOW (tem
)->next
= p
->next
;
779 if (EQ (window
, par
->hchild
))
780 par
->hchild
= p
->next
;
781 if (EQ (window
, par
->vchild
))
782 par
->vchild
= p
->next
;
784 /* Find one of our siblings to give our space to. */
788 /* If p gives its space to its next sibling, that sibling needs
789 to have its top/left side pulled back to where p's is.
790 set_window_{height,width} will re-position the sibling's
793 XWINDOW (sib
)->top
= p
->top
;
794 XWINDOW (sib
)->left
= p
->left
;
797 /* Stretch that sibling. */
798 if (!NILP (par
->vchild
))
799 set_window_height (sib
,
800 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
802 if (!NILP (par
->hchild
))
803 set_window_width (sib
,
804 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
807 /* If parent now has only one child,
808 put the child into the parent's place. */
812 if (NILP (XWINDOW (tem
)->next
))
813 replace_window (parent
, tem
);
815 /* Since we may be deleting combination windows, we must make sure that
816 not only p but all its children have been marked as deleted. */
817 if (! NILP (p
->hchild
))
818 delete_all_subwindows (XWINDOW (p
->hchild
));
819 else if (! NILP (p
->vchild
))
820 delete_all_subwindows (XWINDOW (p
->vchild
));
822 /* Mark this window as deleted. */
823 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
829 extern Lisp_Object
next_frame (), prev_frame ();
831 /* This comment supplies the doc string for `next-window',
832 for make-docfile to see. We cannot put this in the real DEFUN
833 due to limits in the Unix cpp.
835 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
836 "Return next window after WINDOW in canonical ordering of windows.\n\
837 If omitted, WINDOW defaults to the selected window.\n\
839 Optional second arg MINIBUF t means count the minibuffer window even\n\
840 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
841 it is active. MINIBUF neither t nor nil means not to count the\n\
842 minibuffer even if it is active.\n\
844 Several frames may share a single minibuffer; if the minibuffer\n\
845 counts, all windows on all frames that share that minibuffer count\n\
846 too. This means that next-window may be used to iterate through the\n\
847 set of windows even when the minibuffer is on another frame. If the\n\
848 minibuffer does not count, only windows from WINDOW's frame count.\n\
850 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
851 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
852 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
853 Anything else means restrict to WINDOW's frame.\n\
855 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
856 `next-window' to iterate through the entire cycle of acceptable\n\
857 windows, eventually ending up back at the window you started with.\n\
858 `previous-window' traverses the same cycle, in the reverse order.")
859 (window, minibuf, all_frames) */
861 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
863 (window
, minibuf
, all_frames
)
864 register Lisp_Object window
, minibuf
, all_frames
;
866 register Lisp_Object tem
;
867 Lisp_Object start_window
;
870 window
= selected_window
;
872 CHECK_LIVE_WINDOW (window
, 0);
874 start_window
= window
;
876 /* minibuf == nil may or may not include minibuffers.
877 Decide if it does. */
879 minibuf
= (minibuf_level
? Qt
: Qlambda
);
882 /* all_frames == nil doesn't specify which frames to include.
883 Decide which frames it includes. */
884 if (NILP (all_frames
))
885 all_frames
= (EQ (minibuf
, Qt
)
886 ? (FRAME_MINIBUF_WINDOW
889 (XWINDOW (window
)))))
891 else if (EQ (all_frames
, Qvisible
))
893 else if (! EQ (all_frames
, Qt
))
895 /* Now all_frames is t meaning search all frames,
896 nil meaning search just current frame,
897 or a window, meaning search the frame that window belongs to. */
900 /* Do this loop at least once, to get the next window, and perhaps
901 again, if we hit the minibuffer and that is not acceptable. */
904 /* Find a window that actually has a next one. This loop
905 climbs up the tree. */
906 while (tem
= XWINDOW (window
)->next
, NILP (tem
))
907 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
911 /* We've reached the end of this frame.
912 Which other frames are acceptable? */
913 tem
= WINDOW_FRAME (XWINDOW (window
));
915 if (! NILP (all_frames
))
916 tem
= next_frame (tem
, all_frames
);
918 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
925 /* If we're in a combination window, find its first child and
926 recurse on that. Otherwise, we've found the window we want. */
929 if (!NILP (XWINDOW (window
)->hchild
))
930 window
= XWINDOW (window
)->hchild
;
931 else if (!NILP (XWINDOW (window
)->vchild
))
932 window
= XWINDOW (window
)->vchild
;
936 /* Which windows are acceptible?
937 Exit the loop and accept this window if
938 this isn't a minibuffer window, or
939 we're accepting minibuffer windows, or
940 we've come all the way around and we're back at the original window. */
941 while (MINI_WINDOW_P (XWINDOW (window
))
942 && ! EQ (minibuf
, Qt
)
943 && ! EQ (window
, start_window
));
948 /* This comment supplies the doc string for `previous-window',
949 for make-docfile to see. We cannot put this in the real DEFUN
950 due to limits in the Unix cpp.
952 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
953 "Return the window preceeding WINDOW in canonical ordering of windows.\n\
954 If omitted, WINDOW defaults to the selected window.\n\
956 Optional second arg MINIBUF t means count the minibuffer window even\n\
957 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
958 it is active. MINIBUF neither t nor nil means not to count the\n\
959 minibuffer even if it is active.\n\
961 Several frames may share a single minibuffer; if the minibuffer\n\
962 counts, all windows on all frames that share that minibuffer count\n\
963 too. This means that previous-window may be used to iterate through\n\
964 the set of windows even when the minibuffer is on another frame. If\n\
965 the minibuffer does not count, only windows from WINDOW's frame\n\
968 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
969 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
970 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
971 Anything else means restrict to WINDOW's frame.\n\
973 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
974 `previous-window' to iterate through the entire cycle of acceptable\n\
975 windows, eventually ending up back at the window you started with.\n\
976 `next-window' traverses the same cycle, in the reverse order.")
977 (window, minibuf, all_frames) */
980 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
982 (window
, minibuf
, all_frames
)
983 register Lisp_Object window
, minibuf
, all_frames
;
985 register Lisp_Object tem
;
986 Lisp_Object start_window
;
989 window
= selected_window
;
991 CHECK_LIVE_WINDOW (window
, 0);
993 start_window
= window
;
995 /* minibuf == nil may or may not include minibuffers.
996 Decide if it does. */
998 minibuf
= (minibuf_level
? Qt
: Qlambda
);
1001 /* all_frames == nil doesn't specify which frames to include.
1002 Decide which frames it includes. */
1003 if (NILP (all_frames
))
1004 all_frames
= (EQ (minibuf
, Qt
)
1005 ? (FRAME_MINIBUF_WINDOW
1008 (XWINDOW (window
)))))
1010 else if (EQ (all_frames
, Qvisible
))
1012 else if (! EQ (all_frames
, Qt
))
1014 /* Now all_frames is t meaning search all frames,
1015 nil meaning search just current frame,
1016 or a window, meaning search the frame that window belongs to. */
1019 /* Do this loop at least once, to get the previous window, and perhaps
1020 again, if we hit the minibuffer and that is not acceptable. */
1023 /* Find a window that actually has a previous one. This loop
1024 climbs up the tree. */
1025 while (tem
= XWINDOW (window
)->prev
, NILP (tem
))
1026 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1030 /* We have found the top window on the frame.
1031 Which frames are acceptable? */
1032 tem
= WINDOW_FRAME (XWINDOW (window
));
1034 if (! NILP (all_frames
))
1035 /* It's actually important that we use prev_frame here,
1036 rather than next_frame. All the windows acceptable
1037 according to the given parameters should form a ring;
1038 Fnext_window and Fprevious_window should go back and
1039 forth around the ring. If we use next_frame here,
1040 then Fnext_window and Fprevious_window take different
1041 paths through the set of acceptable windows.
1042 window_loop assumes that these `ring' requirement are
1044 tem
= prev_frame (tem
, all_frames
);
1046 /* If this frame has a minibuffer, find that window first,
1047 because it is conceptually the last window in that frame. */
1048 if (FRAME_HAS_MINIBUF_P (XFRAME (tem
)))
1049 tem
= FRAME_MINIBUF_WINDOW (XFRAME (tem
));
1051 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1057 /* If we're in a combination window, find its last child and
1058 recurse on that. Otherwise, we've found the window we want. */
1061 if (!NILP (XWINDOW (window
)->hchild
))
1062 window
= XWINDOW (window
)->hchild
;
1063 else if (!NILP (XWINDOW (window
)->vchild
))
1064 window
= XWINDOW (window
)->vchild
;
1066 while (tem
= XWINDOW (window
)->next
, !NILP (tem
))
1070 /* Which windows are acceptable?
1071 Exit the loop and accept this window if
1072 this isn't a minibuffer window, or
1073 we're accepting minibuffer windows, or
1074 we've come all the way around and we're back at the original window. */
1075 while (MINI_WINDOW_P (XWINDOW (window
))
1076 && !EQ (minibuf
, Qt
)
1077 && !EQ (window
, start_window
));
1082 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1083 "Select the ARG'th different window on this frame.\n\
1084 All windows on current frame are arranged in a cyclic order.\n\
1085 This command selects the window ARG steps away in that order.\n\
1086 A negative ARG moves in the opposite order. If the optional second\n\
1087 argument ALL_FRAMES is non-nil, cycle through all frames.")
1089 register Lisp_Object n
, all_frames
;
1092 register Lisp_Object w
;
1094 CHECK_NUMBER (n
, 0);
1095 w
= selected_window
;
1100 w
= Fnext_window (w
, Qnil
, all_frames
);
1105 w
= Fprevious_window (w
, Qnil
, all_frames
);
1112 /* Look at all windows, performing an operation specified by TYPE
1114 If FRAMES is Qt, look at all frames;
1115 Qnil, look at just the selected frame;
1116 Qvisible, look at visible frames;
1117 a frame, just look at windows on that frame.
1118 If MINI is non-zero, perform the operation on minibuffer windows too.
1124 GET_BUFFER_WINDOW
, /* Arg is buffer */
1125 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1126 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1127 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1129 UNSHOW_BUFFER
/* Arg is buffer */
1133 window_loop (type
, obj
, mini
, frames
)
1134 enum window_loop type
;
1135 register Lisp_Object obj
, frames
;
1138 register Lisp_Object w
;
1139 register Lisp_Object best_window
;
1140 register Lisp_Object next_window
;
1141 register Lisp_Object last_window
;
1143 Lisp_Object frame_arg
;
1147 /* If we're only looping through windows on a particular frame,
1148 frame points to that frame. If we're looping through windows
1149 on all frames, frame is 0. */
1150 if (FRAMEP (frames
))
1151 frame
= XFRAME (frames
);
1152 else if (NILP (frames
))
1153 frame
= selected_frame
;
1157 frame_arg
= Qlambda
;
1158 else if (EQ (frames
, Qvisible
))
1164 /* frame_arg is Qlambda to stick to one frame,
1165 Qvisible to consider all visible frames,
1168 /* Pick a window to start with. */
1169 if (XTYPE (obj
) == Lisp_Window
)
1172 w
= FRAME_SELECTED_WINDOW (frame
);
1174 w
= FRAME_SELECTED_WINDOW (selected_frame
);
1176 /* Figure out the last window we're going to mess with. Since
1177 Fnext_window, given the same options, is guaranteed to go in a
1178 ring, we can just use Fprevious_window to find the last one.
1180 We can't just wait until we hit the first window again, because
1181 it might be deleted. */
1183 last_window
= Fprevious_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1188 FRAME_PTR w_frame
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1190 /* Pick the next window now, since some operations will delete
1191 the current window. */
1192 next_window
= Fnext_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1194 /* Note that we do not pay attention here to whether
1195 the frame is visible, since Fnext_window skips non-visible frames
1196 if that is desired, under the control of frame_arg. */
1197 if (! MINI_WINDOW_P (XWINDOW (w
))
1198 || (mini
&& minibuf_level
> 0))
1201 case GET_BUFFER_WINDOW
:
1202 if (XBUFFER (XWINDOW (w
)->buffer
) == XBUFFER (obj
))
1206 case GET_LRU_WINDOW
:
1207 /* t as arg means consider only full-width windows */
1208 if (!NILP (obj
) && XFASTINT (XWINDOW (w
)->width
)
1209 != FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (w
)))))
1211 /* Ignore dedicated windows and minibuffers. */
1212 if (MINI_WINDOW_P (XWINDOW (w
))
1213 || !NILP (XWINDOW (w
)->dedicated
))
1215 if (NILP (best_window
)
1216 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1217 > XFASTINT (XWINDOW (w
)->use_time
)))
1221 case DELETE_OTHER_WINDOWS
:
1222 if (XWINDOW (w
) != XWINDOW (obj
))
1226 case DELETE_BUFFER_WINDOWS
:
1227 if (EQ (XWINDOW (w
)->buffer
, obj
))
1229 /* If we're deleting the buffer displayed in the only window
1230 on the frame, find a new buffer to display there. */
1231 if (NILP (XWINDOW (w
)->parent
))
1233 Lisp_Object new_buffer
;
1234 new_buffer
= Fother_buffer (obj
, Qnil
);
1235 if (NILP (new_buffer
))
1237 = Fget_buffer_create (build_string ("*scratch*"));
1238 Fset_window_buffer (w
, new_buffer
);
1239 if (EQ (w
, selected_window
))
1240 Fset_buffer (XWINDOW (w
)->buffer
);
1247 case GET_LARGEST_WINDOW
:
1248 /* Ignore dedicated windows and minibuffers. */
1249 if (MINI_WINDOW_P (XWINDOW (w
))
1250 || !NILP (XWINDOW (w
)->dedicated
))
1253 struct window
*best_window_ptr
= XWINDOW (best_window
);
1254 struct window
*w_ptr
= XWINDOW (w
);
1255 if (NILP (best_window
)
1256 || (XFASTINT (w_ptr
->height
) * XFASTINT (w_ptr
->width
)
1257 > (XFASTINT (best_window_ptr
->height
)
1258 * XFASTINT (best_window_ptr
->width
))))
1264 if (EQ (XWINDOW (w
)->buffer
, obj
))
1266 /* Find another buffer to show in this window. */
1267 Lisp_Object another_buffer
;
1268 another_buffer
= Fother_buffer (obj
, Qnil
);
1269 if (NILP (another_buffer
))
1271 = Fget_buffer_create (build_string ("*scratch*"));
1272 XWINDOW (w
)->dedicated
= Qnil
;
1273 Fset_window_buffer (w
, another_buffer
);
1274 if (EQ (w
, selected_window
))
1275 Fset_buffer (XWINDOW (w
)->buffer
);
1280 if (EQ (w
, last_window
))
1289 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1290 "Return the window least recently selected or used for display.\n\
1291 If optional argument FRAME is `visible', search all visible frames.\n\
1292 If FRAME is t, search all frames.\n\
1293 If FRAME is nil, search only the selected frame.\n\
1294 If FRAME is a frame, search only that frame.")
1298 register Lisp_Object w
;
1299 /* First try for a window that is full-width */
1300 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1301 if (!NILP (w
) && !EQ (w
, selected_window
))
1303 /* If none of them, try the rest */
1304 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1307 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1308 "Return the largest window in area.\n\
1309 If optional argument FRAME is `visible', search all visible frames.\n\
1310 If FRAME is t, search all frames.\n\
1311 If FRAME is nil, search only the selected frame.\n\
1312 If FRAME is a frame, search only that frame.")
1316 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1320 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1321 "Return a window currently displaying BUFFER, or nil if none.\n\
1322 If optional argument FRAME is `visible', search all visible frames.\n\
1323 If FRAME is t, search all frames.\n\
1324 If FRAME is nil, search only the selected frame.\n\
1325 If FRAME is a frame, search only that frame.")
1327 Lisp_Object buffer
, frame
;
1329 buffer
= Fget_buffer (buffer
);
1330 if (XTYPE (buffer
) == Lisp_Buffer
)
1331 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1336 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1338 "Make WINDOW (or the selected window) fill its frame.\n\
1339 Only the frame WINDOW is on is affected.\n\
1340 This function tries to reduce display jumps\n\
1341 by keeping the text previously visible in WINDOW\n\
1342 in the same place on the frame. Doing this depends on\n\
1343 the value of (window-start WINDOW), so if calling this function\n\
1344 in a program gives strange scrolling, make sure the window-start\n\
1345 value is reasonable when this function is called.")
1354 window
= selected_window
;
1356 CHECK_LIVE_WINDOW (window
, 0);
1358 w
= XWINDOW (window
);
1359 startpos
= marker_position (w
->start
);
1360 top
= XFASTINT (w
->top
) - FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w
)));
1362 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1364 /* Try to minimize scrolling, by setting the window start to the point
1365 will cause the text at the old window start to be at the same place
1366 on the frame. But don't try to do this if the window start is
1367 outside the visible portion (as might happen when the display is
1368 not current, due to typeahead). */
1369 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
1370 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
1372 struct position pos
;
1373 struct buffer
*obuf
= current_buffer
;
1375 Fset_buffer (w
->buffer
);
1376 /* This computation used to temporarily move point, but that can
1377 have unwanted side effects due to text properties. */
1378 pos
= *vmotion (startpos
, -top
, window_internal_width (w
) - 1,
1379 XINT (w
->hscroll
), window
);
1380 Fset_marker (w
->start
, make_number (pos
.bufpos
), w
->buffer
);
1381 w
->start_at_line_beg
= ((pos
.bufpos
== BEGV
1382 || FETCH_CHAR (pos
.bufpos
- 1) == '\n') ? Qt
1385 set_buffer_internal (obuf
);
1390 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1391 1, 2, "bDelete windows on (buffer): ",
1392 "Delete all windows showing BUFFER.\n\
1393 Optional second argument FRAME controls which frames are affected.\n\
1394 If nil or omitted, delete all windows showing BUFFER in any frame.\n\
1395 If t, delete only windows showing BUFFER in the selected frame.\n\
1396 If `visible', delete all windows showing BUFFER in any visible frame.\n\
1397 If a frame, delete only windows showing BUFFER in that frame.")
1399 Lisp_Object buffer
, frame
;
1402 /* FRAME uses t and nil to mean the opposite of what window_loop
1404 if (! FRAMEP (frame
))
1405 frame
= NILP (frame
) ? Qt
: Qnil
;
1412 buffer
= Fget_buffer (buffer
);
1413 CHECK_BUFFER (buffer
, 0);
1414 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1419 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1420 Sreplace_buffer_in_windows
,
1421 1, 1, "bReplace buffer in windows: ",
1422 "Replace BUFFER with some other buffer in all windows showing it.")
1428 buffer
= Fget_buffer (buffer
);
1429 CHECK_BUFFER (buffer
, 0);
1430 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1435 /* Set the height of WINDOW and all its inferiors. */
1437 /* The smallest acceptable dimensions for a window. Anything smaller
1438 might crash Emacs. */
1439 #define MIN_SAFE_WINDOW_WIDTH (2)
1440 #define MIN_SAFE_WINDOW_HEIGHT (2)
1442 /* Make sure that window_min_height and window_min_width are
1443 not too small; if they are, set them to safe minima. */
1446 check_min_window_sizes ()
1448 /* Smaller values might permit a crash. */
1449 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1450 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1451 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1452 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1455 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1456 minimum allowable size. */
1458 check_frame_size (frame
, rows
, cols
)
1462 /* For height, we have to see:
1463 whether the frame has a minibuffer,
1464 whether it wants a mode line, and
1465 whether it has a menu bar. */
1467 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1468 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1469 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1470 if (FRAME_MENU_BAR_LINES (frame
) > 0)
1471 min_height
+= FRAME_MENU_BAR_LINES (frame
);
1473 if (*rows
< min_height
)
1475 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
1476 *cols
= MIN_SAFE_WINDOW_WIDTH
;
1479 /* Normally the window is deleted if it gets too small.
1480 nodelete nonzero means do not do this.
1481 (The caller should check later and do so if appropriate) */
1483 set_window_height (window
, height
, nodelete
)
1488 register struct window
*w
= XWINDOW (window
);
1489 register struct window
*c
;
1490 int oheight
= XFASTINT (w
->height
);
1491 int top
, pos
, lastbot
, opos
, lastobot
;
1494 check_min_window_sizes ();
1497 && ! NILP (w
->parent
)
1498 && height
< window_min_height
)
1500 Fdelete_window (window
);
1504 XFASTINT (w
->last_modified
) = 0;
1505 windows_or_buffers_changed
++;
1506 XFASTINT (w
->height
) = height
;
1507 if (!NILP (w
->hchild
))
1509 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1511 XWINDOW (child
)->top
= w
->top
;
1512 set_window_height (child
, height
, nodelete
);
1515 else if (!NILP (w
->vchild
))
1517 lastbot
= top
= XFASTINT (w
->top
);
1519 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
1521 c
= XWINDOW (child
);
1523 opos
= lastobot
+ XFASTINT (c
->height
);
1525 XFASTINT (c
->top
) = lastbot
;
1527 pos
= (((opos
* height
) << 1) + oheight
) / (oheight
<< 1);
1529 /* Avoid confusion: inhibit deletion of child if becomes too small */
1530 set_window_height (child
, pos
+ top
- lastbot
, 1);
1532 /* Now advance child to next window,
1533 and set lastbot if child was not just deleted. */
1534 lastbot
= pos
+ top
;
1537 /* Now delete any children that became too small. */
1539 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1541 set_window_height (child
, XINT (XWINDOW (child
)->height
), 0);
1546 /* Recursively set width of WINDOW and its inferiors. */
1548 set_window_width (window
, width
, nodelete
)
1553 register struct window
*w
= XWINDOW (window
);
1554 register struct window
*c
;
1555 int owidth
= XFASTINT (w
->width
);
1556 int left
, pos
, lastright
, opos
, lastoright
;
1559 if (!nodelete
&& width
< window_min_width
&& !NILP (w
->parent
))
1561 Fdelete_window (window
);
1565 XFASTINT (w
->last_modified
) = 0;
1566 windows_or_buffers_changed
++;
1567 XFASTINT (w
->width
) = width
;
1568 if (!NILP (w
->vchild
))
1570 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1572 XWINDOW (child
)->left
= w
->left
;
1573 set_window_width (child
, width
, nodelete
);
1576 else if (!NILP (w
->hchild
))
1578 lastright
= left
= XFASTINT (w
->left
);
1580 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
1582 c
= XWINDOW (child
);
1584 opos
= lastoright
+ XFASTINT (c
->width
);
1586 XFASTINT (c
->left
) = lastright
;
1588 pos
= (((opos
* width
) << 1) + owidth
) / (owidth
<< 1);
1590 /* Inhibit deletion for becoming too small */
1591 set_window_width (child
, pos
+ left
- lastright
, 1);
1593 /* Now advance child to next window,
1594 and set lastright if child was not just deleted. */
1595 lastright
= pos
+ left
, lastoright
= opos
;
1597 /* Delete children that became too small */
1599 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1601 set_window_width (child
, XINT (XWINDOW (child
)->width
), 0);
1606 int window_select_count
;
1608 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
1609 "Make WINDOW display BUFFER as its contents.\n\
1610 BUFFER can be a buffer or buffer name.")
1612 register Lisp_Object window
, buffer
;
1614 register Lisp_Object tem
;
1615 register struct window
*w
= decode_window (window
);
1617 buffer
= Fget_buffer (buffer
);
1618 CHECK_BUFFER (buffer
, 1);
1620 if (NILP (XBUFFER (buffer
)->name
))
1621 error ("Attempt to display deleted buffer");
1625 error ("Window is deleted");
1626 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
1627 is first being set up. */
1629 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
1630 error ("Window is dedicated to `%s'",
1631 XSTRING (XBUFFER (tem
)->name
)->data
);
1637 w
->window_end_pos
= 0;
1638 w
->window_end_valid
= Qnil
;
1640 Fset_marker (w
->pointm
,
1641 make_number (BUF_PT (XBUFFER (buffer
))),
1643 set_marker_restricted (w
->start
,
1644 make_number (XBUFFER (buffer
)->last_window_start
),
1646 w
->start_at_line_beg
= Qnil
;
1647 w
->force_start
= Qnil
;
1648 XFASTINT (w
->last_modified
) = 0;
1649 windows_or_buffers_changed
++;
1650 if (EQ (window
, selected_window
))
1651 Fset_buffer (buffer
);
1656 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
1657 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
1658 The main editor command loop selects the buffer of the selected window\n\
1659 before each command.")
1661 register Lisp_Object window
;
1663 register struct window
*w
;
1664 register struct window
*ow
= XWINDOW (selected_window
);
1666 CHECK_LIVE_WINDOW (window
, 0);
1668 w
= XWINDOW (window
);
1670 if (NILP (w
->buffer
))
1671 error ("Trying to select deleted window or non-leaf window");
1673 XFASTINT (w
->use_time
) = ++window_select_count
;
1674 if (EQ (window
, selected_window
))
1677 Fset_marker (ow
->pointm
, make_number (BUF_PT (XBUFFER (ow
->buffer
))),
1680 selected_window
= window
;
1682 if (XFRAME (WINDOW_FRAME (w
)) != selected_frame
)
1684 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
1685 /* Use this rather than Fhandle_switch_frame
1686 so that FRAME_FOCUS_FRAME is moved appropriately as we
1687 move around in the state where a minibuffer in a separate
1689 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
1692 selected_frame
->selected_window
= window
;
1695 record_buffer (w
->buffer
);
1696 Fset_buffer (w
->buffer
);
1698 /* Go to the point recorded in the window.
1699 This is important when the buffer is in more
1700 than one window. It also matters when
1701 redisplay_window has altered point after scrolling,
1702 because it makes the change only in the window. */
1704 register int new_point
= marker_position (w
->pointm
);
1705 if (new_point
< BEGV
)
1713 windows_or_buffers_changed
++;
1717 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 2,
1718 "BDisplay buffer: \nP",
1719 "Make BUFFER appear in some window but don't select it.\n\
1720 BUFFER can be a buffer or a buffer name.\n\
1721 If BUFFER is shown already in some window, just use that one,\n\
1722 unless the window is the selected window and the optional second\n\
1723 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
1724 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
1725 Returns the window displaying BUFFER.")
1726 (buffer
, not_this_window
)
1727 register Lisp_Object buffer
, not_this_window
;
1729 register Lisp_Object window
, tem
;
1731 buffer
= Fget_buffer (buffer
);
1732 CHECK_BUFFER (buffer
, 0);
1734 if (!NILP (Vdisplay_buffer_function
))
1735 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
1737 if (NILP (not_this_window
)
1738 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
1739 return selected_window
;
1742 /* If pop_up_frames,
1743 look for a window showing BUFFER on any visible frame. */
1744 window
= Fget_buffer_window (buffer
, pop_up_frames
? Qvisible
: Qnil
);
1746 window
= Fget_buffer_window (buffer
, Qnil
);
1749 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
1752 /* Certain buffer names get special handling. */
1753 if (! NILP (Vspecial_display_function
))
1755 tem
= Fmember (XBUFFER (buffer
)->name
, Vspecial_display_buffer_names
);
1757 return call1 (Vspecial_display_function
, buffer
);
1759 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCONS (tem
)->cdr
)
1760 if (fast_string_match (XCONS (tem
)->car
, XBUFFER (buffer
)->name
) >= 0)
1761 return call1 (Vspecial_display_function
, buffer
);
1765 /* If there are no frames open that have more than a minibuffer,
1766 we need to create a new frame. */
1767 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
1769 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
1770 Fset_window_buffer (window
, buffer
);
1773 #endif /* MULTI_FRAME */
1777 || FRAME_MINIBUF_ONLY_P (selected_frame
)
1785 if (FRAME_MINIBUF_ONLY_P (selected_frame
))
1786 XSET (frames
, Lisp_Frame
, last_nonminibuf_frame
);
1788 /* Don't try to create a window if would get an error */
1789 if (split_height_threshold
< window_min_height
<< 1)
1790 split_height_threshold
= window_min_height
<< 1;
1792 window
= Fget_largest_window (frames
);
1795 && window_height (window
) >= split_height_threshold
1796 && (XFASTINT (XWINDOW (window
)->width
)
1797 == FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (window
))))))
1798 window
= Fsplit_window (window
, Qnil
, Qnil
);
1801 window
= Fget_lru_window (frames
);
1802 if ((EQ (window
, selected_window
)
1803 || EQ (XWINDOW (window
)->parent
, Qnil
))
1804 && window_height (window
) >= window_min_height
<< 1)
1805 window
= Fsplit_window (window
, Qnil
, Qnil
);
1809 window
= Fget_lru_window (Qnil
);
1811 Fset_window_buffer (window
, buffer
);
1816 temp_output_buffer_show (buf
)
1817 register Lisp_Object buf
;
1819 register struct buffer
*old
= current_buffer
;
1820 register Lisp_Object window
;
1821 register struct window
*w
;
1824 XBUFFER (buf
)->save_modified
= MODIFF
;
1829 set_buffer_internal (old
);
1831 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
1832 call1 (Vtemp_buffer_show_function
, buf
);
1835 window
= Fdisplay_buffer (buf
, Qnil
);
1838 if (XFRAME (XWINDOW (window
)->frame
) != selected_frame
)
1839 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
1840 #endif /* MULTI_FRAME */
1841 Vminibuf_scroll_window
= window
;
1842 w
= XWINDOW (window
);
1843 XFASTINT (w
->hscroll
) = 0;
1844 set_marker_restricted (w
->start
, make_number (1), buf
);
1845 set_marker_restricted (w
->pointm
, make_number (1), buf
);
1850 make_dummy_parent (window
)
1853 register Lisp_Object old
, new;
1854 register struct window
*o
, *p
;
1857 XSETTYPE (old
, Lisp_Vector
);
1858 new = Fcopy_sequence (old
);
1859 XSETTYPE (new, Lisp_Window
);
1863 XFASTINT (p
->sequence_number
) = ++sequence_number
;
1865 /* Put new into window structure in place of window */
1866 replace_window (window
, new);
1879 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
1880 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
1881 WINDOW defaults to selected one and SIZE to half its size.\n\
1882 If optional third arg HOR-FLAG is non-nil, split side by side\n\
1883 and put SIZE columns in the first of the pair.")
1884 (window
, chsize
, horflag
)
1885 Lisp_Object window
, chsize
, horflag
;
1887 register Lisp_Object
new;
1888 register struct window
*o
, *p
;
1892 window
= selected_window
;
1894 CHECK_LIVE_WINDOW (window
, 0);
1896 o
= XWINDOW (window
);
1900 if (!NILP (horflag
))
1901 /* Round odd size up, since this is for the left-hand window,
1902 and it will lose a column for the separators. */
1903 size
= ((XFASTINT (o
->width
) + 1) & -2) >> 1;
1905 size
= XFASTINT (o
->height
) >> 1;
1909 CHECK_NUMBER (chsize
, 1);
1910 size
= XINT (chsize
);
1913 if (MINI_WINDOW_P (o
))
1914 error ("Attempt to split minibuffer window");
1915 else if (FRAME_NO_SPLIT_P (XFRAME (WINDOW_FRAME (o
))))
1916 error ("Attempt to split unsplittable frame");
1918 check_min_window_sizes ();
1922 if (size
< window_min_height
1923 || size
+ window_min_height
> XFASTINT (o
->height
))
1924 args_out_of_range_3 (window
, chsize
, horflag
);
1925 if (NILP (o
->parent
)
1926 || NILP (XWINDOW (o
->parent
)->vchild
))
1928 make_dummy_parent (window
);
1930 XWINDOW (new)->vchild
= window
;
1935 if (size
< window_min_width
1936 || size
+ window_min_width
> XFASTINT (o
->width
))
1937 args_out_of_range_3 (window
, chsize
, horflag
);
1938 if (NILP (o
->parent
)
1939 || NILP (XWINDOW (o
->parent
)->hchild
))
1941 make_dummy_parent (window
);
1943 XWINDOW (new)->hchild
= window
;
1947 /* Now we know that window's parent is a vertical combination
1948 if we are dividing vertically, or a horizontal combination
1949 if we are making side-by-side windows */
1951 windows_or_buffers_changed
++;
1952 new = make_window ();
1955 p
->frame
= o
->frame
;
1957 if (!NILP (p
->next
))
1958 XWINDOW (p
->next
)->prev
= new;
1961 p
->parent
= o
->parent
;
1964 Fset_window_buffer (new, o
->buffer
);
1966 /* Apportion the available frame space among the two new windows */
1968 if (!NILP (horflag
))
1970 p
->height
= o
->height
;
1972 XFASTINT (p
->width
) = XFASTINT (o
->width
) - size
;
1973 XFASTINT (o
->width
) = size
;
1974 XFASTINT (p
->left
) = XFASTINT (o
->left
) + size
;
1979 p
->width
= o
->width
;
1980 XFASTINT (p
->height
) = XFASTINT (o
->height
) - size
;
1981 XFASTINT (o
->height
) = size
;
1982 XFASTINT (p
->top
) = XFASTINT (o
->top
) + size
;
1988 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
1989 "Make current window ARG lines bigger.\n\
1990 From program, optional second arg non-nil means grow sideways ARG columns.")
1992 register Lisp_Object n
, side
;
1994 CHECK_NUMBER (n
, 0);
1995 change_window_height (XINT (n
), !NILP (side
));
1999 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
2000 "Make current window ARG lines smaller.\n\
2001 From program, optional second arg non-nil means shrink sideways ARG columns.")
2003 register Lisp_Object n
, side
;
2005 CHECK_NUMBER (n
, 0);
2006 change_window_height (-XINT (n
), !NILP (side
));
2011 window_height (window
)
2014 register struct window
*p
= XWINDOW (window
);
2015 return XFASTINT (p
->height
);
2019 window_width (window
)
2022 register struct window
*p
= XWINDOW (window
);
2023 return XFASTINT (p
->width
);
2026 #define MINSIZE(w) \
2028 ? window_min_width \
2029 : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height))
2032 *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top))
2034 #define CURSIZE(w) \
2035 *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height))
2037 /* Unlike set_window_height, this function
2038 also changes the heights of the siblings so as to
2039 keep everything consistent. */
2041 change_window_height (delta
, widthflag
)
2045 register Lisp_Object parent
;
2047 register struct window
*p
;
2049 int (*sizefun
) () = widthflag
? window_width
: window_height
;
2050 register int (*setsizefun
) () = (widthflag
2052 : set_window_height
);
2054 check_min_window_sizes ();
2056 window
= selected_window
;
2059 p
= XWINDOW (window
);
2064 error ("No other window to side of this one");
2067 if (widthflag
? !NILP (XWINDOW (parent
)->hchild
)
2068 : !NILP (XWINDOW (parent
)->vchild
))
2073 sizep
= &CURSIZE (window
);
2076 register int maxdelta
;
2078 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - *sizep
2079 : !NILP (p
->next
) ? (*sizefun
) (p
->next
) - MINSIZE (p
->next
)
2080 : !NILP (p
->prev
) ? (*sizefun
) (p
->prev
) - MINSIZE (p
->prev
)
2081 /* This is a frame with only one window, a minibuffer-only
2082 or a minibufferless frame. */
2085 if (delta
> maxdelta
)
2086 /* This case traps trying to make the minibuffer
2087 the full frame, or make the only window aside from the
2088 minibuffer the full frame. */
2092 if (*sizep
+ delta
< MINSIZE (window
))
2094 Fdelete_window (window
);
2102 && (*sizefun
) (p
->next
) - delta
>= MINSIZE (p
->next
))
2104 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
) - delta
, 0);
2105 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2106 CURBEG (p
->next
) += delta
;
2107 /* This does not change size of p->next,
2108 but it propagates the new top edge to its children */
2109 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
), 0);
2111 else if (!NILP (p
->prev
)
2112 && (*sizefun
) (p
->prev
) - delta
>= MINSIZE (p
->prev
))
2114 (*setsizefun
) (p
->prev
, (*sizefun
) (p
->prev
) - delta
, 0);
2115 CURBEG (window
) -= delta
;
2116 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2120 register int delta1
;
2121 register int opht
= (*sizefun
) (parent
);
2123 /* If trying to grow this window to or beyond size of the parent,
2124 make delta1 so big that, on shrinking back down,
2125 all the siblings end up with less than one line and are deleted. */
2126 if (opht
<= *sizep
+ delta
)
2127 delta1
= opht
* opht
* 2;
2128 /* Otherwise, make delta1 just right so that if we add delta1
2129 lines to this window and to the parent, and then shrink
2130 the parent back to its original size, the new proportional
2131 size of this window will increase by delta. */
2133 delta1
= (delta
* opht
* 100) / ((opht
- *sizep
- delta
) * 100);
2135 /* Add delta1 lines or columns to this window, and to the parent,
2136 keeping things consistent while not affecting siblings. */
2137 CURSIZE (parent
) = opht
+ delta1
;
2138 (*setsizefun
) (window
, *sizep
+ delta1
, 0);
2140 /* Squeeze out delta1 lines or columns from our parent,
2141 shriking this window and siblings proportionately.
2142 This brings parent back to correct size.
2143 Delta1 was calculated so this makes this window the desired size,
2144 taking it all out of the siblings. */
2145 (*setsizefun
) (parent
, opht
, 0);
2148 XFASTINT (p
->last_modified
) = 0;
2155 /* Return number of lines of text (not counting mode line) in W. */
2158 window_internal_height (w
)
2161 int ht
= XFASTINT (w
->height
);
2163 if (MINI_WINDOW_P (w
))
2166 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
2167 || !NILP (w
->next
) || !NILP (w
->prev
)
2168 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
2175 /* Return the number of columns in W.
2176 Don't count columns occupied by scroll bars or the vertical bar
2177 separating W from the sibling to its right. */
2179 window_internal_width (w
)
2182 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
2183 int left
= XINT (w
->left
);
2184 int width
= XINT (w
->width
);
2186 /* If this window is flush against the right edge of the frame, its
2187 internal width is its full width. */
2188 if (left
+ width
>= FRAME_WIDTH (f
))
2191 /* If we are not flush right, then our rightmost columns are
2192 occupied by some sort of separator. */
2194 /* Scroll bars occupy a few columns. */
2195 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2196 return width
- VERTICAL_SCROLL_BAR_WIDTH
;
2198 /* The column of `|' characters separating side-by-side windows
2199 occupies one column only. */
2204 /* Scroll contents of window WINDOW up N lines. */
2207 window_scroll (window
, n
, noerror
)
2212 register struct window
*w
= XWINDOW (window
);
2213 register int opoint
= PT
;
2215 register int ht
= window_internal_height (w
);
2216 register Lisp_Object tem
;
2218 Lisp_Object bolp
, nmoved
;
2220 XFASTINT (tem
) = PT
;
2221 tem
= Fpos_visible_in_window_p (tem
, window
);
2225 Fvertical_motion (make_number (- (ht
/ 2)), window
);
2226 XFASTINT (tem
) = PT
;
2227 Fset_marker (w
->start
, tem
, w
->buffer
);
2228 w
->force_start
= Qt
;
2231 SET_PT (marker_position (w
->start
));
2232 lose
= n
< 0 && PT
== BEGV
;
2233 Fvertical_motion (make_number (n
), window
);
2243 Fsignal (Qbeginning_of_buffer
, Qnil
);
2248 set_marker_restricted (w
->start
, make_number (pos
), w
->buffer
);
2249 w
->start_at_line_beg
= bolp
;
2250 w
->update_mode_line
= Qt
;
2251 XFASTINT (w
->last_modified
) = 0;
2257 tem
= Fvertical_motion (make_number (ht
), window
);
2258 if (PT
> opoint
|| XFASTINT (tem
) < ht
)
2261 Fvertical_motion (make_number (-1), window
);
2269 Fsignal (Qend_of_buffer
, Qnil
);
2273 /* This is the guts of Fscroll_up and Fscroll_down. */
2276 scroll_command (n
, direction
)
2277 register Lisp_Object n
;
2280 register int defalt
;
2281 int count
= specpdl_ptr
- specpdl
;
2283 /* If selected window's buffer isn't current, make it current for the moment.
2284 But don't screw up if window_scroll gets an error. */
2285 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
2287 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2288 Fset_buffer (XWINDOW (selected_window
)->buffer
);
2291 defalt
= (window_internal_height (XWINDOW (selected_window
))
2292 - next_screen_context_lines
);
2293 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
2296 window_scroll (selected_window
, defalt
, 0);
2297 else if (EQ (n
, Qminus
))
2298 window_scroll (selected_window
, - defalt
, 0);
2301 n
= Fprefix_numeric_value (n
);
2302 window_scroll (selected_window
, XINT (n
) * direction
, 0);
2305 unbind_to (count
, Qnil
);
2308 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
2309 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
2310 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2311 Negative ARG means scroll downward.\n\
2312 When calling from a program, supply a number as argument or nil.")
2316 scroll_command (n
, 1);
2320 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
2321 "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\
2322 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2323 Negative ARG means scroll upward.\n\
2324 When calling from a program, supply a number as argument or nil.")
2328 scroll_command (n
, -1);
2332 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
2333 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
2334 The next window is the one below the current one; or the one at the top\n\
2335 if the current one is at the bottom. Negative ARG means scroll downward.\n\
2336 When calling from a program, supply a number as argument or nil.\n\
2338 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
2339 specifies the window to scroll.\n\
2340 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
2341 showing that buffer, popping the buffer up if necessary.")
2343 register Lisp_Object n
;
2345 register Lisp_Object window
;
2347 register struct window
*w
;
2348 register int count
= specpdl_ptr
- specpdl
;
2350 if (MINI_WINDOW_P (XWINDOW (selected_window
))
2351 && !NILP (Vminibuf_scroll_window
))
2352 window
= Vminibuf_scroll_window
;
2353 /* If buffer is specified, scroll that buffer. */
2354 else if (!NILP (Vother_window_scroll_buffer
))
2356 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
2358 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
);
2362 /* Nothing specified; look for a neighboring window on the same
2364 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
2366 if (EQ (window
, selected_window
))
2367 /* That didn't get us anywhere; look for a window on another
2370 window
= Fnext_window (window
, Qnil
, Qt
);
2371 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
2372 && ! EQ (window
, selected_window
));
2375 CHECK_LIVE_WINDOW (window
, 0);
2377 if (EQ (window
, selected_window
))
2378 error ("There is no other window");
2380 w
= XWINDOW (window
);
2381 ht
= window_internal_height (w
);
2383 /* Don't screw up if window_scroll gets an error. */
2384 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2386 Fset_buffer (w
->buffer
);
2387 SET_PT (marker_position (w
->pointm
));
2390 window_scroll (window
, ht
- next_screen_context_lines
, 1);
2391 else if (EQ (n
, Qminus
))
2392 window_scroll (window
, next_screen_context_lines
- ht
, 1);
2395 if (XTYPE (n
) == Lisp_Cons
)
2397 CHECK_NUMBER (n
, 0);
2398 window_scroll (window
, XINT (n
), 1);
2401 Fset_marker (w
->pointm
, make_number (PT
), Qnil
);
2402 unbind_to (count
, Qnil
);
2407 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
2408 "Scroll selected window display ARG columns left.\n\
2409 Default for ARG is window width minus 2.")
2411 register Lisp_Object arg
;
2415 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2417 arg
= Fprefix_numeric_value (arg
);
2420 Fset_window_hscroll (selected_window
,
2421 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2425 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
2426 "Scroll selected window display ARG columns right.\n\
2427 Default for ARG is window width minus 2.")
2429 register Lisp_Object arg
;
2432 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2434 arg
= Fprefix_numeric_value (arg
);
2437 Fset_window_hscroll (selected_window
,
2438 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2442 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
2443 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
2444 The desired position of point is always relative to the current window.\n\
2445 Just C-u as prefix means put point in the center of the window.\n\
2446 No arg (i.e., it is nil) erases the entire frame and then\n\
2447 redraws with point in the center of the current window.")
2449 register Lisp_Object n
;
2451 register struct window
*w
= XWINDOW (selected_window
);
2452 register int ht
= window_internal_height (w
);
2453 register int opoint
= PT
;
2458 extern int frame_garbaged
;
2460 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
2461 XFASTINT (n
) = ht
/ 2;
2463 else if (XTYPE (n
) == Lisp_Cons
) /* Just C-u. */
2465 XFASTINT (n
) = ht
/ 2;
2469 n
= Fprefix_numeric_value (n
);
2470 CHECK_NUMBER (n
, 0);
2474 XSETINT (n
, XINT (n
) + ht
);
2476 XSETINT (n
, - XINT (n
));
2478 XSET (window
, Lisp_Window
, w
);
2479 Fvertical_motion (n
, window
);
2480 Fset_marker (w
->start
, make_number (PT
), w
->buffer
);
2481 w
->start_at_line_beg
= Fbolp ();
2484 w
->force_start
= Qt
;
2489 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
2491 "Position point relative to window.\n\
2492 With no argument, position text at center of window.\n\
2493 An argument specifies frame line; zero means top of window,\n\
2494 negative means relative to bottom of window.")
2496 register Lisp_Object arg
;
2498 register struct window
*w
= XWINDOW (selected_window
);
2499 register int height
= window_internal_height (w
);
2504 XFASTINT (arg
) = height
/ 2;
2507 arg
= Fprefix_numeric_value (arg
);
2509 XSETINT (arg
, XINT (arg
) + height
);
2512 start
= marker_position (w
->start
);
2513 XSET (window
, Lisp_Window
, w
);
2514 if (start
< BEGV
|| start
> ZV
)
2516 Fvertical_motion (make_number (- (height
/ 2)), window
);
2517 Fset_marker (w
->start
, make_number (PT
), w
->buffer
);
2518 w
->start_at_line_beg
= Fbolp ();
2519 w
->force_start
= Qt
;
2524 return Fvertical_motion (arg
, window
);
2527 struct save_window_data
2529 int size_from_Lisp_Vector_struct
;
2530 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2531 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
2532 Lisp_Object selected_frame
;
2533 Lisp_Object current_window
;
2534 Lisp_Object current_buffer
;
2535 Lisp_Object minibuf_scroll_window
;
2536 Lisp_Object root_window
;
2537 Lisp_Object focus_frame
;
2538 /* A vector, interpreted as a struct saved_window */
2539 Lisp_Object saved_windows
;
2542 /* Arg to Fmake_vector */
2543 #define SAVE_WINDOW_DATA_SIZE \
2544 ((sizeof (struct save_window_data) \
2545 - (sizeof (struct Lisp_Vector) \
2546 /* Don't count the contents member of the struct Lisp_Vector */ \
2547 - sizeof (Lisp_Object))) \
2548 / sizeof (Lisp_Object))
2550 /* This is saved as a Lisp_Vector */
2553 /* these first two must agree with struct Lisp_Vector in lisp.h */
2554 int size_from_Lisp_Vector_struct
;
2555 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2558 Lisp_Object buffer
, start
, pointm
, mark
;
2559 Lisp_Object left
, top
, width
, height
, hscroll
;
2560 Lisp_Object parent
, prev
;
2561 Lisp_Object start_at_line_beg
;
2562 Lisp_Object display_table
;
2564 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
2566 #define SAVED_WINDOW_N(swv,n) \
2567 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
2569 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
2570 "T if OBJECT is a window-configration object.")
2574 if (XTYPE (obj
) == Lisp_Window_Configuration
)
2580 DEFUN ("set-window-configuration", Fset_window_configuration
,
2581 Sset_window_configuration
, 1, 1, 0,
2582 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
2583 CONFIGURATION must be a value previously returned\n\
2584 by `current-window-configuration' (which see).")
2586 Lisp_Object configuration
;
2588 register struct save_window_data
*data
;
2589 struct Lisp_Vector
*saved_windows
;
2590 Lisp_Object new_current_buffer
;
2594 while (XTYPE (configuration
) != Lisp_Window_Configuration
)
2596 configuration
= wrong_type_argument (intern ("window-configuration-p"),
2600 data
= (struct save_window_data
*) XVECTOR (configuration
);
2601 saved_windows
= XVECTOR (data
->saved_windows
);
2603 new_current_buffer
= data
->current_buffer
;
2604 if (NILP (XBUFFER (new_current_buffer
)->name
))
2605 new_current_buffer
= Qnil
;
2607 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
2610 /* If f is a dead frame, don't bother rebuilding its window tree.
2611 However, there is other stuff we should still try to do below. */
2612 if (FRAME_LIVE_P (f
))
2614 register struct window
*w
;
2615 register struct saved_window
*p
;
2618 /* If the frame has been resized since this window configuration was
2619 made, we change the frame to the size specified in the
2620 configuration, restore the configuration, and then resize it
2621 back. We keep track of the prevailing height in these variables. */
2622 int previous_frame_height
= FRAME_HEIGHT (f
);
2623 int previous_frame_width
= FRAME_WIDTH (f
);
2624 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
2626 if (XFASTINT (data
->frame_height
) != previous_frame_height
2627 || XFASTINT (data
->frame_width
) != previous_frame_width
)
2628 change_frame_size (f
, data
->frame_height
, data
->frame_width
, 0, 0);
2629 #ifdef HAVE_X_WINDOWS
2630 if (XFASTINT (data
->frame_menu_bar_lines
)
2631 != previous_frame_menu_bar_lines
)
2632 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, 0);
2635 windows_or_buffers_changed
++;
2638 Mark all windows now on frame as "deleted".
2639 Restoring the new configuration "undeletes" any that are in it.
2641 Save their current buffers in their height fields, since we may
2642 need it later, if a buffer saved in the configuration is now
2644 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2646 for (k
= 0; k
< saved_windows
->size
; k
++)
2648 p
= SAVED_WINDOW_N (saved_windows
, k
);
2649 w
= XWINDOW (p
->window
);
2652 if (!NILP (p
->parent
))
2653 w
->parent
= SAVED_WINDOW_N (saved_windows
,
2654 XFASTINT (p
->parent
))->window
;
2658 if (!NILP (p
->prev
))
2660 w
->prev
= SAVED_WINDOW_N (saved_windows
,
2661 XFASTINT (p
->prev
))->window
;
2662 XWINDOW (w
->prev
)->next
= p
->window
;
2667 if (!NILP (w
->parent
))
2669 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
2671 XWINDOW (w
->parent
)->vchild
= p
->window
;
2672 XWINDOW (w
->parent
)->hchild
= Qnil
;
2676 XWINDOW (w
->parent
)->hchild
= p
->window
;
2677 XWINDOW (w
->parent
)->vchild
= Qnil
;
2682 /* If we squirreled away the buffer in the window's height,
2684 if (XTYPE (w
->height
) == Lisp_Buffer
)
2685 w
->buffer
= w
->height
;
2688 w
->width
= p
->width
;
2689 w
->height
= p
->height
;
2690 w
->hscroll
= p
->hscroll
;
2691 w
->display_table
= p
->display_table
;
2692 XFASTINT (w
->last_modified
) = 0;
2694 /* Reinstall the saved buffer and pointers into it. */
2695 if (NILP (p
->buffer
))
2696 w
->buffer
= p
->buffer
;
2699 if (!NILP (XBUFFER (p
->buffer
)->name
))
2700 /* If saved buffer is alive, install it. */
2702 w
->buffer
= p
->buffer
;
2703 w
->start_at_line_beg
= p
->start_at_line_beg
;
2704 set_marker_restricted (w
->start
,
2705 Fmarker_position (p
->start
),
2707 set_marker_restricted (w
->pointm
,
2708 Fmarker_position (p
->pointm
),
2710 Fset_marker (XBUFFER (w
->buffer
)->mark
,
2711 Fmarker_position (p
->mark
), w
->buffer
);
2713 /* As documented in Fcurrent_window_configuration, don't
2714 save the location of point in the buffer which was current
2715 when the window configuration was recorded. */
2716 if (!EQ (p
->buffer
, new_current_buffer
)
2717 && XBUFFER (p
->buffer
) == current_buffer
)
2718 Fgoto_char (w
->pointm
);
2720 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
2721 /* Else unless window has a live buffer, get one. */
2723 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
2724 /* This will set the markers to beginning of visible
2726 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
2727 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
2728 w
->start_at_line_beg
= Qt
;
2731 /* Keeping window's old buffer; make sure the markers
2734 /* Set window markers at start of visible range. */
2735 if (XMARKER (w
->start
)->buffer
== 0)
2736 set_marker_restricted (w
->start
, make_number (0),
2738 if (XMARKER (w
->pointm
)->buffer
== 0)
2739 set_marker_restricted (w
->pointm
,
2741 (BUF_PT (XBUFFER (w
->buffer
)))),
2743 w
->start_at_line_beg
= Qt
;
2748 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
2749 Fselect_window (data
->current_window
);
2752 if (NILP (data
->focus_frame
)
2753 || (XTYPE (data
->focus_frame
) == Lisp_Frame
2754 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
2755 Fredirect_frame_focus (frame
, data
->focus_frame
);
2758 #if 0 /* I don't understand why this is needed, and it causes problems
2759 when the frame's old selected window has been deleted. */
2761 if (f
!= selected_frame
&& ! FRAME_TERMCAP_P (f
))
2762 Fhandle_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)), Qnil
);
2766 /* Set the screen height to the value it had before this function. */
2767 if (previous_frame_height
!= FRAME_HEIGHT (f
)
2768 || previous_frame_width
!= FRAME_WIDTH (f
))
2769 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
2771 #ifdef HAVE_X_WINDOWS
2772 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
2773 x_set_menu_bar_lines (f
, previous_frame_menu_bar_lines
, 0);
2778 /* Fselect_window will have made f the selected frame, so we
2779 reselect the proper frame here. Fhandle_switch_frame will change the
2780 selected window too, but that doesn't make the call to
2781 Fselect_window above totally superfluous; it still sets f's
2783 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
2784 Fhandle_switch_frame (data
->selected_frame
, Qnil
);
2787 if (!NILP (new_current_buffer
))
2788 Fset_buffer (new_current_buffer
);
2790 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
2794 /* Mark all windows now on frame as deleted
2795 by setting their buffers to nil. */
2798 delete_all_subwindows (w
)
2799 register struct window
*w
;
2801 if (!NILP (w
->next
))
2802 delete_all_subwindows (XWINDOW (w
->next
));
2803 if (!NILP (w
->vchild
))
2804 delete_all_subwindows (XWINDOW (w
->vchild
));
2805 if (!NILP (w
->hchild
))
2806 delete_all_subwindows (XWINDOW (w
->hchild
));
2808 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
2810 /* We set all three of these fields to nil, to make sure that we can
2811 distinguish this dead window from any live window. Live leaf
2812 windows will have buffer set, and combination windows will have
2813 vchild or hchild set. */
2820 count_windows (window
)
2821 register struct window
*window
;
2823 register int count
= 1;
2824 if (!NILP (window
->next
))
2825 count
+= count_windows (XWINDOW (window
->next
));
2826 if (!NILP (window
->vchild
))
2827 count
+= count_windows (XWINDOW (window
->vchild
));
2828 if (!NILP (window
->hchild
))
2829 count
+= count_windows (XWINDOW (window
->hchild
));
2834 save_window_save (window
, vector
, i
)
2836 struct Lisp_Vector
*vector
;
2839 register struct saved_window
*p
;
2840 register struct window
*w
;
2841 register Lisp_Object tem
;
2843 for (;!NILP (window
); window
= w
->next
)
2845 p
= SAVED_WINDOW_N (vector
, i
);
2846 w
= XWINDOW (window
);
2848 XFASTINT (w
->temslot
) = i
++;
2850 p
->buffer
= w
->buffer
;
2853 p
->width
= w
->width
;
2854 p
->height
= w
->height
;
2855 p
->hscroll
= w
->hscroll
;
2856 p
->display_table
= w
->display_table
;
2857 if (!NILP (w
->buffer
))
2859 /* Save w's value of point in the window configuration.
2860 If w is the selected window, then get the value of point
2861 from the buffer; pointm is garbage in the selected window. */
2862 if (EQ (window
, selected_window
))
2864 p
->pointm
= Fmake_marker ();
2865 Fset_marker (p
->pointm
, BUF_PT (XBUFFER (w
->buffer
)),
2869 p
->pointm
= Fcopy_marker (w
->pointm
);
2871 p
->start
= Fcopy_marker (w
->start
);
2872 p
->start_at_line_beg
= w
->start_at_line_beg
;
2874 tem
= XBUFFER (w
->buffer
)->mark
;
2875 p
->mark
= Fcopy_marker (tem
);
2882 p
->start_at_line_beg
= Qnil
;
2885 if (NILP (w
->parent
))
2888 p
->parent
= XWINDOW (w
->parent
)->temslot
;
2893 p
->prev
= XWINDOW (w
->prev
)->temslot
;
2895 if (!NILP (w
->vchild
))
2896 i
= save_window_save (w
->vchild
, vector
, i
);
2897 if (!NILP (w
->hchild
))
2898 i
= save_window_save (w
->hchild
, vector
, i
);
2904 DEFUN ("current-window-configuration",
2905 Fcurrent_window_configuration
, Scurrent_window_configuration
, 0, 1, 0,
2906 "Return an object representing the current window configuration of FRAME.\n\
2907 If FRAME is nil or omitted, use the selected frame.\n\
2908 This describes the number of windows, their sizes and current buffers,\n\
2909 and for each displayed buffer, where display starts, and the positions of\n\
2910 point and mark. An exception is made for point in the current buffer:\n\
2911 its value is -not- saved.\n\
2912 This also records the currently selected frame, and FRAME's focus\n\
2913 redirection (see `redirect-frame-focus').")
2917 register Lisp_Object tem
;
2918 register int n_windows
;
2919 register struct save_window_data
*data
;
2927 CHECK_LIVE_FRAME (frame
, 0);
2931 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2932 data
= (struct save_window_data
*)
2933 XVECTOR (Fmake_vector (make_number (SAVE_WINDOW_DATA_SIZE
),
2935 XFASTINT (data
->frame_width
) = FRAME_WIDTH (f
);
2936 XFASTINT (data
->frame_height
) = FRAME_HEIGHT (f
);
2937 XFASTINT (data
->frame_menu_bar_lines
) = FRAME_MENU_BAR_LINES (f
);
2939 XSET (data
->selected_frame
, Lisp_Frame
, selected_frame
);
2941 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
2942 XSET (data
->current_buffer
, Lisp_Buffer
, current_buffer
);
2943 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
2944 data
->root_window
= FRAME_ROOT_WINDOW (f
);
2945 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
2946 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
2947 data
->saved_windows
= tem
;
2948 for (i
= 0; i
< n_windows
; i
++)
2949 XVECTOR (tem
)->contents
[i
]
2950 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
2951 save_window_save (FRAME_ROOT_WINDOW (f
),
2953 XSET (tem
, Lisp_Window_Configuration
, data
);
2957 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
2959 "Execute body, preserving window sizes and contents.\n\
2960 Restores which buffer appears in which window, where display starts,\n\
2961 as well as the current buffer.\n\
2962 Does not restore the value of point in current buffer.")
2966 register Lisp_Object val
;
2967 register int count
= specpdl_ptr
- specpdl
;
2969 record_unwind_protect (Fset_window_configuration
,
2970 Fcurrent_window_configuration (Qnil
));
2971 val
= Fprogn (args
);
2972 return unbind_to (count
, val
);
2978 selected_frame
= make_terminal_frame ();
2979 minibuf_window
= selected_frame
->minibuffer_window
;
2980 selected_window
= selected_frame
->selected_window
;
2981 last_nonminibuf_frame
= selected_frame
;
2982 #else /* not MULTI_FRAME */
2983 extern Lisp_Object
get_minibuffer ();
2985 minibuf_window
= make_window ();
2986 FRAME_ROOT_WINDOW (selected_frame
) = make_window ();
2988 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->next
= minibuf_window
;
2989 XWINDOW (minibuf_window
)->prev
= FRAME_ROOT_WINDOW (selected_frame
);
2990 XWINDOW (minibuf_window
)->mini_p
= Qt
;
2992 /* These values 9 and 10 are arbitrary,
2993 just so that there is "something there."
2994 Correct values are put in in init_xdisp */
2996 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->width
) = 10;
2997 XFASTINT (XWINDOW (minibuf_window
)->width
) = 10;
2999 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->height
) = 9;
3000 XFASTINT (XWINDOW (minibuf_window
)->top
) = 9;
3001 XFASTINT (XWINDOW (minibuf_window
)->height
) = 1;
3003 /* Prevent error in Fset_window_buffer. */
3004 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->buffer
= Qt
;
3005 XWINDOW (minibuf_window
)->buffer
= Qt
;
3007 /* Now set them up for real. */
3008 Fset_window_buffer (FRAME_ROOT_WINDOW (selected_frame
),
3009 Fcurrent_buffer ());
3010 Fset_window_buffer (minibuf_window
, get_minibuffer (0));
3012 selected_window
= FRAME_ROOT_WINDOW (selected_frame
);
3013 /* Make sure this window seems more recently used than
3014 a newly-created, never-selected window. Increment
3015 window_select_count so the first selection ever will get
3016 something newer than this. */
3017 XFASTINT (XWINDOW (selected_window
)->use_time
) = ++window_select_count
;
3018 #endif /* not MULTI_FRAME */
3023 Qwindowp
= intern ("windowp");
3024 staticpro (&Qwindowp
);
3026 Qwindow_live_p
= intern ("window-live-p");
3027 staticpro (&Qwindow_live_p
);
3030 /* Make sure all windows get marked */
3031 staticpro (&minibuf_window
);
3034 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
3035 "Non-nil means call as function to display a help buffer.\n\
3036 Used by `with-output-to-temp-buffer'.");
3037 Vtemp_buffer_show_function
= Qnil
;
3039 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
3040 "If non-nil, function to call to handle `display-buffer'.\n\
3041 It will receive two args, the buffer and a flag which if non-nil means\n\
3042 that the currently selected window is not acceptable.\n\
3043 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
3044 work using this function.");
3045 Vdisplay_buffer_function
= Qnil
;
3047 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
3048 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
3049 Vminibuf_scroll_window
= Qnil
;
3051 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
3052 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
3053 Vother_window_scroll_buffer
= Qnil
;
3055 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
3056 "*Non-nil means `display-buffer' should make a separate frame.");
3059 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
3060 "Function to call to handle automatic new frame creation.\n\
3061 It is called with no arguments and should return a newly created frame.\n\
3063 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
3064 where `pop-up-frame-alist' would hold the default frame parameters.");
3065 Vpop_up_frame_function
= Qnil
;
3067 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
3068 "*List of buffer names that should have their own special frames.\n\
3069 Displaying a buffer whose name is in this list makes a special frame for it\n\
3070 using `special-display-function'. See also `special-display-regexps'.");
3071 Vspecial_display_buffer_names
= Qnil
;
3073 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
3074 "*List of regexps saying which buffers should have their own special frames.\n\
3075 If a buffer name matches one of these regexps, it gets its own frame.\n\
3076 Displaying a buffer whose name is in this list makes a special frame for it\n\
3077 using `special-display-function'. See also `special-display-buffer-names'.");
3078 Vspecial_display_regexps
= Qnil
;
3080 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
3081 "Function to call to make a new frame for a special buffer.\n\
3082 It is called with one argument, the buffer,\n\
3083 and should return a window displaying that buffer.\n\
3084 The default value makes a separate frame for the buffer,\n\
3085 using `special-display-alist' to specify the frame parameters.\n\
3087 A buffer is special if its is listed in `special-display-buffer-names'\n\
3088 or matches a regexp in `special-display-regexps'.");
3089 Vspecial_display_function
= Qnil
;
3091 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
3092 "*Non-nil means display-buffer should make new windows.");
3095 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
3096 "*Number of lines of continuity when scrolling by screenfuls.");
3097 next_screen_context_lines
= 2;
3099 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
3100 "*display-buffer would prefer to split the largest window if this large.\n\
3101 If there is only one window, it is split regardless of this value.");
3102 split_height_threshold
= 500;
3104 DEFVAR_INT ("window-min-height", &window_min_height
,
3105 "*Delete any window less than this tall (including its mode line).");
3106 window_min_height
= 4;
3108 DEFVAR_INT ("window-min-width", &window_min_width
,
3109 "*Delete any window less than this wide.");
3110 window_min_width
= 10;
3112 defsubr (&Sselected_window
);
3113 defsubr (&Sminibuffer_window
);
3114 defsubr (&Swindow_minibuffer_p
);
3115 defsubr (&Swindowp
);
3116 defsubr (&Swindow_live_p
);
3117 defsubr (&Spos_visible_in_window_p
);
3118 defsubr (&Swindow_buffer
);
3119 defsubr (&Swindow_height
);
3120 defsubr (&Swindow_width
);
3121 defsubr (&Swindow_hscroll
);
3122 defsubr (&Sset_window_hscroll
);
3123 defsubr (&Swindow_edges
);
3124 defsubr (&Scoordinates_in_window_p
);
3125 defsubr (&Swindow_at
);
3126 defsubr (&Swindow_point
);
3127 defsubr (&Swindow_start
);
3128 defsubr (&Swindow_end
);
3129 defsubr (&Sset_window_point
);
3130 defsubr (&Sset_window_start
);
3131 defsubr (&Swindow_dedicated_p
);
3132 defsubr (&Sset_window_dedicated_p
);
3133 defsubr (&Swindow_display_table
);
3134 defsubr (&Sset_window_display_table
);
3135 defsubr (&Snext_window
);
3136 defsubr (&Sprevious_window
);
3137 defsubr (&Sother_window
);
3138 defsubr (&Sget_lru_window
);
3139 defsubr (&Sget_largest_window
);
3140 defsubr (&Sget_buffer_window
);
3141 defsubr (&Sdelete_other_windows
);
3142 defsubr (&Sdelete_windows_on
);
3143 defsubr (&Sreplace_buffer_in_windows
);
3144 defsubr (&Sdelete_window
);
3145 defsubr (&Sset_window_buffer
);
3146 defsubr (&Sselect_window
);
3147 defsubr (&Sdisplay_buffer
);
3148 defsubr (&Ssplit_window
);
3149 defsubr (&Senlarge_window
);
3150 defsubr (&Sshrink_window
);
3151 defsubr (&Sscroll_up
);
3152 defsubr (&Sscroll_down
);
3153 defsubr (&Sscroll_left
);
3154 defsubr (&Sscroll_right
);
3155 defsubr (&Sscroll_other_window
);
3156 defsubr (&Srecenter
);
3157 defsubr (&Smove_to_window_line
);
3158 defsubr (&Swindow_configuration_p
);
3159 defsubr (&Sset_window_configuration
);
3160 defsubr (&Scurrent_window_configuration
);
3161 defsubr (&Ssave_window_excursion
);
3166 initial_define_key (control_x_map
, '1', "delete-other-windows");
3167 initial_define_key (control_x_map
, '2', "split-window");
3168 initial_define_key (control_x_map
, '0', "delete-window");
3169 initial_define_key (control_x_map
, 'o', "other-window");
3170 initial_define_key (control_x_map
, '^', "enlarge-window");
3171 initial_define_key (control_x_map
, '<', "scroll-left");
3172 initial_define_key (control_x_map
, '>', "scroll-right");
3174 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
3175 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
3176 initial_define_key (meta_map
, 'v', "scroll-down");
3178 initial_define_key (global_map
, Ctl('L'), "recenter");
3179 initial_define_key (meta_map
, 'r', "move-to-window-line");