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 /* Fdisplay_buffer always splits the largest window
83 if that window is more than this high. */
84 int split_height_threshold
;
86 /* Number of lines of continuity in scrolling by screenfuls. */
87 int next_screen_context_lines
;
89 /* Incremented for each window created. */
90 static int sequence_number
;
92 #define min(a, b) ((a) < (b) ? (a) : (b))
94 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
95 "Returns t if OBJ is a window.")
99 return XTYPE (obj
) == Lisp_Window
? Qt
: Qnil
;
102 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
103 "Returns t if OBJ is a window which is currently visible.")
107 return ((XTYPE (obj
) == Lisp_Window
108 && ! NILP (XWINDOW (obj
)->buffer
))
115 register Lisp_Object val
;
116 register struct window
*p
;
118 /* Add sizeof (Lisp_Object) here because sizeof (struct Lisp_Vector)
119 includes the first element. */
121 make_number ((sizeof (struct window
) - sizeof (struct Lisp_Vector
)
122 + sizeof (Lisp_Object
))
123 / sizeof (Lisp_Object
)),
125 XSETTYPE (val
, Lisp_Window
);
127 XFASTINT (p
->sequence_number
) = ++sequence_number
;
128 XFASTINT (p
->left
) = XFASTINT (p
->top
)
129 = XFASTINT (p
->height
) = XFASTINT (p
->width
)
130 = XFASTINT (p
->hscroll
) = 0;
131 XFASTINT (p
->last_point_x
) = XFASTINT (p
->last_point_y
) = 0;
132 p
->start
= Fmake_marker ();
133 p
->pointm
= Fmake_marker ();
134 XFASTINT (p
->use_time
) = 0;
136 p
->display_table
= Qnil
;
141 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
142 "Return the window that the cursor now appears in and commands apply to.")
145 return selected_window
;
148 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
149 "Return the window used now for minibuffers.\n\
150 If the optional argument FRAME is specified, return the minibuffer window\n\
151 used by that frame.")
157 XSET (frame
, Lisp_Frame
, selected_frame
);
159 CHECK_LIVE_FRAME (frame
, 0);
162 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
165 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
166 "Returns non-nil if WINDOW is a minibuffer window.")
170 struct window
*w
= decode_window (window
);
171 return (MINI_WINDOW_P (w
) ? Qt
: Qnil
);
174 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
175 Spos_visible_in_window_p
, 0, 2, 0,
176 "Return t if position POS is currently on the frame in WINDOW.\n\
177 Returns nil if that position is scrolled vertically out of view.\n\
178 POS defaults to point; WINDOW, to the selected window.")
180 Lisp_Object pos
, window
;
182 register struct window
*w
;
186 register struct buffer
*buf
;
187 struct position posval
;
194 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
198 w
= decode_window (window
);
199 top
= marker_position (w
->start
);
200 hscroll
= XINT (w
->hscroll
);
205 height
= XFASTINT (w
->height
) - ! MINI_WINDOW_P (w
);
207 buf
= XBUFFER (w
->buffer
);
208 if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
))
210 /* If frame is up to date,
211 use the info recorded about how much text fit on it. */
212 if (posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
)
213 || (XFASTINT (w
->window_end_vpos
) < height
))
219 if (posint
> BUF_ZV (buf
))
222 /* If that info is not correct, calculate afresh */
223 posval
= *compute_motion (top
, 0, (hscroll
? 1 - hscroll
: 0),
225 window_internal_width (w
) - 1,
228 return posval
.vpos
< height
? Qt
: Qnil
;
232 static struct window
*
233 decode_window (window
)
234 register Lisp_Object window
;
237 return XWINDOW (selected_window
);
239 CHECK_LIVE_WINDOW (window
, 0);
240 return XWINDOW (window
);
243 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
244 "Return the buffer that WINDOW is displaying.")
248 return decode_window (window
)->buffer
;
251 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
252 "Return the number of lines in WINDOW (including its mode line).")
256 return decode_window (window
)->height
;
259 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
260 "Return the number of display columns in WINDOW.\n\
261 This is the width that is usable columns available for text in WINDOW.\n\
262 If you want to find out how many columns WINDOW takes up,\n\
263 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
267 register struct window
*w
= decode_window (window
);
268 register int width
= XFASTINT (w
->width
);
270 return make_number (window_internal_width (w
));
273 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
274 "Return the number of columns by which WINDOW is scrolled from left margin.")
278 return decode_window (window
)->hscroll
;
281 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
282 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
283 NCOL should be zero or positive.")
285 register Lisp_Object window
, ncol
;
287 register struct window
*w
;
289 CHECK_NUMBER (ncol
, 1);
290 if (XINT (ncol
) < 0) XFASTINT (ncol
) = 0;
291 if (XFASTINT (ncol
) >= (1 << (SHORTBITS
- 1)))
292 args_out_of_range (ncol
, Qnil
);
293 w
= decode_window (window
);
294 if (XINT (w
->hscroll
) != XINT (ncol
))
295 clip_changed
= 1; /* Prevent redisplay shortcuts */
300 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
301 "Return a list of the edge coordinates of WINDOW.\n\
302 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
303 RIGHT is one more than the rightmost column used by WINDOW,\n\
304 and BOTTOM is one more than the bottommost row used by WINDOW\n\
309 register struct window
*w
= decode_window (window
);
311 return Fcons (w
->left
, Fcons (w
->top
,
312 Fcons (make_number (XFASTINT (w
->left
) + XFASTINT (w
->width
)),
313 Fcons (make_number (XFASTINT (w
->top
)
314 + XFASTINT (w
->height
)),
318 /* Test if the character at column *x, row *y is within window *w.
319 If it is not, return 0;
320 if it is in the window's text area,
321 set *x and *y to its location relative to the upper left corner
324 if it is on the window's modeline, return 2;
325 if it is on the border between the window and its right sibling,
328 coordinates_in_window (w
, x
, y
)
329 register struct window
*w
;
332 register int left
= XINT (w
->left
);
333 register int width
= XINT (w
->width
);
334 register int window_height
= XINT (w
->height
);
335 register int top
= XFASTINT (w
->top
);
337 if ( *x
< left
|| *x
>= left
+ width
338 || *y
< top
|| *y
>= top
+ window_height
)
341 /* Is the character is the mode line? */
342 if (*y
== top
+ window_height
- 1
343 && ! MINI_WINDOW_P (w
))
346 /* Is the character in the right border? */
347 if (*x
== left
+ width
- 1
348 && left
+ width
!= FRAME_WIDTH (XFRAME (w
->frame
)))
356 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
357 Scoordinates_in_window_p
, 2, 2, 0,
358 "Return non-nil if COORDINATES are in WINDOW.\n\
359 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
360 measured in characters from the upper-left corner of the frame.\n\
361 (0 . 0) denotes the character in the upper left corner of the\n\
363 If COORDINATES are in the text portion of WINDOW,\n\
364 the coordinates relative to the window are returned.\n\
365 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
366 If they are on the border between WINDOW and its right sibling,\n\
367 `vertical-line' is returned.")
368 (coordinates
, window
)
369 register Lisp_Object coordinates
, window
;
373 CHECK_LIVE_WINDOW (window
, 0);
374 CHECK_CONS (coordinates
, 1);
375 x
= XINT (Fcar (coordinates
));
376 y
= XINT (Fcdr (coordinates
));
378 switch (coordinates_in_window (XWINDOW (window
), &x
, &y
))
380 case 0: /* NOT in window at all. */
383 case 1: /* In text part of window. */
386 case 2: /* In mode line of window. */
389 case 3: /* On right border of window. */
390 return Qvertical_line
;
397 /* Find the window containing column x, row y, and return it as a
398 Lisp_Object. If x, y is on the window's modeline, set *part
399 to 1; if it is on the separating line between the window and its
400 right sibling, set it to 2; otherwise set it to 0. If there is no
401 window under x, y return nil and leave *part unmodified. */
403 window_from_coordinates (frame
, x
, y
, part
)
408 register Lisp_Object tem
, first
;
410 tem
= first
= FRAME_SELECTED_WINDOW (frame
);
414 int found
= coordinates_in_window (XWINDOW (tem
), &x
, &y
);
422 tem
= Fnext_window (tem
, Qt
, Qlambda
);
424 while (! EQ (tem
, first
));
429 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
430 "Return window containing coordinates X and Y on FRAME.\n\
431 If omitted, FRAME defaults to the currently selected frame.\n\
432 The top left corner of the frame is considered to be row 0,\n\
435 Lisp_Object x
, y
, frame
;
441 XSET (frame
, Lisp_Frame
, selected_frame
);
443 CHECK_LIVE_FRAME (frame
, 2);
448 return window_from_coordinates (XFRAME (frame
),
453 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
454 "Return current value of point in WINDOW.\n\
455 For a nonselected window, this is the value point would have\n\
456 if that window were selected.\n\
458 Note that, when WINDOW is the selected window and its buffer\n\
459 is also currently selected, the value returned is the same as (point).\n\
460 It would be more strictly correct to return the `top-level' value\n\
461 of point, outside of any save-excursion forms.\n\
462 But that is hard to define.")
466 register struct window
*w
= decode_window (window
);
468 if (w
== XWINDOW (selected_window
)
469 && current_buffer
== XBUFFER (w
->buffer
))
471 return Fmarker_position (w
->pointm
);
474 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
475 "Return position at which display currently starts in WINDOW.")
479 return Fmarker_position (decode_window (window
)->start
);
482 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 1, 0,
483 "Return position at which display currently ends in WINDOW.")
488 struct window
*w
= decode_window (window
);
492 CHECK_BUFFER (buf
, 0);
494 XSET (value
, Lisp_Int
,
495 BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
500 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
501 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
503 Lisp_Object window
, pos
;
505 register struct window
*w
= decode_window (window
);
507 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
508 if (w
== XWINDOW (selected_window
))
511 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
516 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
517 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
518 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
519 from overriding motion of point in order to display at this exact start.")
520 (window
, pos
, noforce
)
521 Lisp_Object window
, pos
, noforce
;
523 register struct window
*w
= decode_window (window
);
525 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
526 set_marker_restricted (w
->start
, pos
, w
->buffer
);
527 /* this is not right, but much easier than doing what is right. */
528 w
->start_at_line_beg
= Qnil
;
531 w
->update_mode_line
= Qt
;
532 XFASTINT (w
->last_modified
) = 0;
533 if (!EQ (window
, selected_window
))
534 windows_or_buffers_changed
++;
538 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
540 "Return WINDOW's dedicated object, usually t or nil.\n\
541 See also `set-window-dedicated-p'.")
545 return decode_window (window
)->dedicated
;
548 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
549 Sset_window_dedicated_p
, 2, 2, 0,
550 "Control whether WINDOW is dedicated to the buffer it displays.\n\
551 If it is dedicated, Emacs will not automatically change\n\
552 which buffer appears in it.\n\
553 The second argument is the new value for the dedication flag;\n\
556 Lisp_Object window
, arg
;
558 register struct window
*w
= decode_window (window
);
568 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
570 "Return the display-table that WINDOW is using.")
574 return decode_window (window
)->display_table
;
577 /* Get the display table for use currently on window W.
578 This is either W's display table or W's buffer's display table.
579 Ignore the specified tables if they are not valid;
580 if no valid table is specified, return 0. */
583 window_display_table (w
)
587 tem
= w
->display_table
;
588 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
589 return XVECTOR (tem
);
590 tem
= XBUFFER (w
->buffer
)->display_table
;
591 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
592 return XVECTOR (tem
);
593 tem
= Vstandard_display_table
;
594 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
595 return XVECTOR (tem
);
599 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
600 "Set WINDOW's display-table to TABLE.")
602 register Lisp_Object window
, table
;
604 register struct window
*w
;
605 register Lisp_Object z
; /* Return value. */
607 w
= decode_window (window
);
608 w
->display_table
= table
;
612 /* Record info on buffer window w is displaying
613 when it is about to cease to display that buffer. */
616 register struct window
*w
;
618 Lisp_Object buf
= w
->buffer
;
620 if (XBUFFER (buf
) != XMARKER (w
->pointm
)->buffer
)
624 if (w
== XWINDOW (selected_window
)
625 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
626 /* Do this except when the selected window's buffer
627 is being removed from some other window. */
629 /* last_window_start records the start position that this buffer
630 had in the last window to be disconnected from it.
631 Now that this statement is unconditional,
632 it is possible for the buffer to be displayed in the
633 selected window, while last_window_start reflects another
634 window which was recently showing the same buffer.
635 Some people might say that might be a good thing. Let's see. */
636 XBUFFER (buf
)->last_window_start
= marker_position (w
->start
);
638 /* Point in the selected window's buffer
639 is actually stored in that buffer, and the window's pointm isn't used.
640 So don't clobber point in that buffer. */
641 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
))
642 BUF_PT (XBUFFER (buf
))
643 = clip_to_bounds (BUF_BEGV (XBUFFER (buf
)),
644 marker_position (w
->pointm
),
645 BUF_ZV (XBUFFER (buf
)));
648 /* Put replacement into the window structure in place of old. */
650 replace_window (old
, replacement
)
651 Lisp_Object old
, replacement
;
653 register Lisp_Object tem
;
654 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
656 /* If OLD is its frame's root_window, then replacement is the new
657 root_window for that frame. */
659 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
660 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
665 p
->height
= o
->height
;
667 p
->next
= tem
= o
->next
;
669 XWINDOW (tem
)->prev
= replacement
;
671 p
->prev
= tem
= o
->prev
;
673 XWINDOW (tem
)->next
= replacement
;
675 p
->parent
= tem
= o
->parent
;
678 if (EQ (XWINDOW (tem
)->vchild
, old
))
679 XWINDOW (tem
)->vchild
= replacement
;
680 if (EQ (XWINDOW (tem
)->hchild
, old
))
681 XWINDOW (tem
)->hchild
= replacement
;
684 /*** Here, if replacement is a vertical combination
685 and so is its new parent, we should make replacement's
686 children be children of that parent instead. ***/
689 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
690 "Remove WINDOW from the display. Default is selected window.")
692 register Lisp_Object window
;
694 register Lisp_Object tem
, parent
, sib
;
695 register struct window
*p
;
696 register struct window
*par
;
698 /* Because this function is called by other C code on non-leaf
699 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
700 so we can't decode_window here. */
702 window
= selected_window
;
704 CHECK_WINDOW (window
, 0);
705 p
= XWINDOW (window
);
707 /* It's okay to delete an already-deleted window. */
715 error ("Attempt to delete minibuffer or sole ordinary window");
716 par
= XWINDOW (parent
);
718 windows_or_buffers_changed
++;
720 /* Are we trying to delete any frame's selected window? */
722 Lisp_Object frame
, pwindow
;
724 /* See if the frame's selected window is either WINDOW
725 or any subwindow of it, by finding all that window's parents
726 and comparing each one with WINDOW. */
727 frame
= WINDOW_FRAME (XWINDOW (window
));
728 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
730 while (!NILP (pwindow
))
732 if (EQ (window
, pwindow
))
734 pwindow
= XWINDOW (pwindow
)->parent
;
737 if (EQ (window
, pwindow
))
739 Lisp_Object alternative
;
740 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
742 /* If we're about to delete the selected window on the
743 selected frame, then we should use Fselect_window to select
744 the new window. On the other hand, if we're about to
745 delete the selected window on any other frame, we shouldn't do
746 anything but set the frame's selected_window slot. */
747 if (EQ (window
, selected_window
))
748 Fselect_window (alternative
);
750 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
755 /* tem is null for dummy parent windows
756 (which have inferiors but not any contents themselves) */
760 unchain_marker (p
->pointm
);
761 unchain_marker (p
->start
);
766 XWINDOW (tem
)->prev
= p
->prev
;
770 XWINDOW (tem
)->next
= p
->next
;
772 if (EQ (window
, par
->hchild
))
773 par
->hchild
= p
->next
;
774 if (EQ (window
, par
->vchild
))
775 par
->vchild
= p
->next
;
777 /* Find one of our siblings to give our space to. */
781 /* If p gives its space to its next sibling, that sibling needs
782 to have its top/left side pulled back to where p's is.
783 set_window_{height,width} will re-position the sibling's
786 XWINDOW (sib
)->top
= p
->top
;
787 XWINDOW (sib
)->left
= p
->left
;
790 /* Stretch that sibling. */
791 if (!NILP (par
->vchild
))
792 set_window_height (sib
,
793 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
795 if (!NILP (par
->hchild
))
796 set_window_width (sib
,
797 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
800 /* If parent now has only one child,
801 put the child into the parent's place. */
805 if (NILP (XWINDOW (tem
)->next
))
806 replace_window (parent
, tem
);
808 /* Since we may be deleting combination windows, we must make sure that
809 not only p but all its children have been marked as deleted. */
810 if (! NILP (p
->hchild
))
811 delete_all_subwindows (XWINDOW (p
->hchild
));
812 else if (! NILP (p
->vchild
))
813 delete_all_subwindows (XWINDOW (p
->vchild
));
815 /* Mark this window as deleted. */
816 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
822 extern Lisp_Object
next_frame (), prev_frame ();
824 /* This comment supplies the doc string for `next-window',
825 for make-docfile to see. We cannot put this in the real DEFUN
826 due to limits in the Unix cpp.
828 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
829 "Return next window after WINDOW in canonical ordering of windows.\n\
830 If omitted, WINDOW defaults to the selected window.\n\
832 Optional second arg MINIBUF t means count the minibuffer window even\n\
833 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
834 it is active. MINIBUF neither t nor nil means not to count the\n\
835 minibuffer even if it is active.\n\
837 Several frames may share a single minibuffer; if the minibuffer\n\
838 counts, all windows on all frames that share that minibuffer count\n\
839 too. This means that next-window may be used to iterate through the\n\
840 set of windows even when the minibuffer is on another frame. If the\n\
841 minibuffer does not count, only windows from WINDOW's frame count.\n\
843 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
844 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
845 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
846 Anything else means restrict to WINDOW's frame.\n\
848 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
849 `next-window' to iterate through the entire cycle of acceptable\n\
850 windows, eventually ending up back at the window you started with.\n\
851 `previous-window' traverses the same cycle, in the reverse order.")
852 (window, minibuf, all_frames) */
854 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
856 (window
, minibuf
, all_frames
)
857 register Lisp_Object window
, minibuf
, all_frames
;
859 register Lisp_Object tem
;
860 Lisp_Object start_window
;
863 window
= selected_window
;
865 CHECK_LIVE_WINDOW (window
, 0);
867 start_window
= window
;
869 /* minibuf == nil may or may not include minibuffers.
870 Decide if it does. */
872 minibuf
= (minibuf_level
? Qt
: Qlambda
);
874 /* all_frames == nil doesn't specify which frames to include.
875 Decide which frames it includes. */
876 if (NILP (all_frames
))
877 all_frames
= (EQ (minibuf
, Qt
)
878 ? (FRAME_MINIBUF_WINDOW
881 (XWINDOW (window
)))))
883 else if (EQ (all_frames
, Qvisible
))
885 else if (! EQ (all_frames
, Qt
))
887 /* Now all_frames is t meaning search all frames,
888 nil meaning search just current frame,
889 or a window, meaning search the frame that window belongs to. */
891 /* Do this loop at least once, to get the next window, and perhaps
892 again, if we hit the minibuffer and that is not acceptable. */
895 /* Find a window that actually has a next one. This loop
896 climbs up the tree. */
897 while (tem
= XWINDOW (window
)->next
, NILP (tem
))
898 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
902 /* We've reached the end of this frame.
903 Which other frames are acceptable? */
904 tem
= WINDOW_FRAME (XWINDOW (window
));
906 if (! NILP (all_frames
))
907 tem
= next_frame (tem
, all_frames
);
909 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
916 /* If we're in a combination window, find its first child and
917 recurse on that. Otherwise, we've found the window we want. */
920 if (!NILP (XWINDOW (window
)->hchild
))
921 window
= XWINDOW (window
)->hchild
;
922 else if (!NILP (XWINDOW (window
)->vchild
))
923 window
= XWINDOW (window
)->vchild
;
927 /* Which windows are acceptible?
928 Exit the loop and accept this window if
929 this isn't a minibuffer window, or
930 we're accepting minibuffer windows, or
931 we've come all the way around and we're back at the original window. */
932 while (MINI_WINDOW_P (XWINDOW (window
))
933 && ! EQ (minibuf
, Qt
)
934 && ! EQ (window
, start_window
));
939 /* This comment supplies the doc string for `previous-window',
940 for make-docfile to see. We cannot put this in the real DEFUN
941 due to limits in the Unix cpp.
943 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
944 "Return the window preceeding WINDOW in canonical ordering of windows.\n\
945 If omitted, WINDOW defaults to the selected window.\n\
947 Optional second arg MINIBUF t means count the minibuffer window even\n\
948 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
949 it is active. MINIBUF neither t nor nil means not to count the\n\
950 minibuffer even if it is active.\n\
952 Several frames may share a single minibuffer; if the minibuffer\n\
953 counts, all windows on all frames that share that minibuffer count\n\
954 too. This means that previous-window may be used to iterate through\n\
955 the set of windows even when the minibuffer is on another frame. If\n\
956 the minibuffer does not count, only windows from WINDOW's frame\n\
959 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
960 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
961 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
962 Anything else means restrict to WINDOW's frame.\n\
964 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
965 `previous-window' to iterate through the entire cycle of acceptable\n\
966 windows, eventually ending up back at the window you started with.\n\
967 `next-window' traverses the same cycle, in the reverse order.")
968 (window, minibuf, all_frames) */
971 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
973 (window
, minibuf
, all_frames
)
974 register Lisp_Object window
, minibuf
, all_frames
;
976 register Lisp_Object tem
;
977 Lisp_Object start_window
;
980 window
= selected_window
;
982 CHECK_LIVE_WINDOW (window
, 0);
984 start_window
= window
;
986 /* minibuf == nil may or may not include minibuffers.
987 Decide if it does. */
989 minibuf
= (minibuf_level
? Qt
: Qlambda
);
991 /* all_frames == nil doesn't specify which frames to include.
992 Decide which frames it includes. */
993 if (NILP (all_frames
))
994 all_frames
= (EQ (minibuf
, Qt
)
995 ? (FRAME_MINIBUF_WINDOW
998 (XWINDOW (window
)))))
1000 else if (EQ (all_frames
, Qvisible
))
1002 else if (! EQ (all_frames
, Qt
))
1004 /* Now all_frames is t meaning search all frames,
1005 nil meaning search just current frame,
1006 or a window, meaning search the frame that window belongs to. */
1008 /* Do this loop at least once, to get the previous window, and perhaps
1009 again, if we hit the minibuffer and that is not acceptable. */
1012 /* Find a window that actually has a previous one. This loop
1013 climbs up the tree. */
1014 while (tem
= XWINDOW (window
)->prev
, NILP (tem
))
1015 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
1019 /* We have found the top window on the frame.
1020 Which frames are acceptable? */
1021 tem
= WINDOW_FRAME (XWINDOW (window
));
1023 if (! NILP (all_frames
))
1024 /* It's actually important that we use prev_frame here,
1025 rather than next_frame. All the windows acceptable
1026 according to the given parameters should form a ring;
1027 Fnext_window and Fprevious_window should go back and
1028 forth around the ring. If we use next_frame here,
1029 then Fnext_window and Fprevious_window take different
1030 paths through the set of acceptable windows.
1031 window_loop assumes that these `ring' requirement are
1033 tem
= prev_frame (tem
, all_frames
);
1035 /* If this frame has a minibuffer, find that window first,
1036 because it is conceptually the last window in that frame. */
1037 if (FRAME_HAS_MINIBUF_P (XFRAME (tem
)))
1038 tem
= FRAME_MINIBUF_WINDOW (XFRAME (tem
));
1040 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1046 /* If we're in a combination window, find its last child and
1047 recurse on that. Otherwise, we've found the window we want. */
1050 if (!NILP (XWINDOW (window
)->hchild
))
1051 window
= XWINDOW (window
)->hchild
;
1052 else if (!NILP (XWINDOW (window
)->vchild
))
1053 window
= XWINDOW (window
)->vchild
;
1055 while (tem
= XWINDOW (window
)->next
, !NILP (tem
))
1059 /* Which windows are acceptable?
1060 Exit the loop and accept this window if
1061 this isn't a minibuffer window, or
1062 we're accepting minibuffer windows, or
1063 we've come all the way around and we're back at the original window. */
1064 while (MINI_WINDOW_P (XWINDOW (window
))
1065 && !EQ (minibuf
, Qt
)
1066 && !EQ (window
, start_window
));
1071 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1072 "Select the ARG'th different window on this frame.\n\
1073 All windows on current frame are arranged in a cyclic order.\n\
1074 This command selects the window ARG steps away in that order.\n\
1075 A negative ARG moves in the opposite order. If the optional second\n\
1076 argument ALL_FRAMES is non-nil, cycle through all frames.")
1078 register Lisp_Object n
, all_frames
;
1081 register Lisp_Object w
;
1083 CHECK_NUMBER (n
, 0);
1084 w
= selected_window
;
1089 w
= Fnext_window (w
, Qnil
, all_frames
);
1094 w
= Fprevious_window (w
, Qnil
, all_frames
);
1101 /* Look at all windows, performing an operation specified by TYPE
1103 If FRAMES is Qt, look at all frames;
1104 Qnil, look at just the selected frame;
1105 Qvisible, look at visible frames;
1106 a frame, just look at windows on that frame.
1107 If MINI is non-zero, perform the operation on minibuffer windows too.
1113 GET_BUFFER_WINDOW
, /* Arg is buffer */
1114 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1115 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1116 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1118 UNSHOW_BUFFER
/* Arg is buffer */
1122 window_loop (type
, obj
, mini
, frames
)
1123 enum window_loop type
;
1124 register Lisp_Object obj
, frames
;
1127 register Lisp_Object w
;
1128 register Lisp_Object best_window
;
1129 register Lisp_Object next_window
;
1130 register Lisp_Object last_window
;
1132 Lisp_Object frame_arg
;
1136 /* If we're only looping through windows on a particular frame,
1137 frame points to that frame. If we're looping through windows
1138 on all frames, frame is 0. */
1139 if (FRAMEP (frames
))
1140 frame
= XFRAME (frames
);
1141 else if (NILP (frames
))
1142 frame
= selected_frame
;
1146 frame_arg
= Qlambda
;
1147 else if (EQ (frames
, Qvisible
))
1153 /* frame_arg is Qlambda to stick to one frame,
1154 Qvisible to consider all visible frames,
1157 /* Pick a window to start with. */
1158 if (XTYPE (obj
) == Lisp_Window
)
1161 w
= FRAME_SELECTED_WINDOW (frame
);
1163 w
= FRAME_SELECTED_WINDOW (selected_frame
);
1165 /* Figure out the last window we're going to mess with. Since
1166 Fnext_window, given the same options, is guaranteed to go in a
1167 ring, we can just use Fprevious_window to find the last one.
1169 We can't just wait until we hit the first window again, because
1170 it might be deleted. */
1172 last_window
= Fprevious_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1177 FRAME_PTR w_frame
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1179 /* Pick the next window now, since some operations will delete
1180 the current window. */
1181 next_window
= Fnext_window (w
, mini
? Qt
: Qnil
, frame_arg
);
1183 /* Note that we do not pay attention here to whether
1184 the frame is visible, since Fnext_window skips non-visible frames
1185 if that is desired, under the control of frame_arg. */
1186 if (! MINI_WINDOW_P (XWINDOW (w
))
1187 || (mini
&& minibuf_level
> 0))
1190 case GET_BUFFER_WINDOW
:
1191 if (XBUFFER (XWINDOW (w
)->buffer
) == XBUFFER (obj
))
1195 case GET_LRU_WINDOW
:
1196 /* t as arg means consider only full-width windows */
1197 if (!NILP (obj
) && XFASTINT (XWINDOW (w
)->width
)
1198 != FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (w
)))))
1200 /* Ignore dedicated windows and minibuffers. */
1201 if (MINI_WINDOW_P (XWINDOW (w
))
1202 || !NILP (XWINDOW (w
)->dedicated
))
1204 if (NILP (best_window
)
1205 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1206 > XFASTINT (XWINDOW (w
)->use_time
)))
1210 case DELETE_OTHER_WINDOWS
:
1211 if (XWINDOW (w
) != XWINDOW (obj
))
1215 case DELETE_BUFFER_WINDOWS
:
1216 if (EQ (XWINDOW (w
)->buffer
, obj
))
1218 /* If we're deleting the buffer displayed in the only window
1219 on the frame, find a new buffer to display there. */
1220 if (NILP (XWINDOW (w
)->parent
))
1222 Lisp_Object new_buffer
= Fother_buffer (obj
, Qnil
);
1223 if (NILP (new_buffer
))
1225 = Fget_buffer_create (build_string ("*scratch*"));
1226 Fset_window_buffer (w
, new_buffer
);
1227 if (EQ (w
, selected_window
))
1228 Fset_buffer (XWINDOW (w
)->buffer
);
1235 case GET_LARGEST_WINDOW
:
1236 /* Ignore dedicated windows and minibuffers. */
1237 if (MINI_WINDOW_P (XWINDOW (w
))
1238 || !NILP (XWINDOW (w
)->dedicated
))
1241 struct window
*best_window_ptr
= XWINDOW (best_window
);
1242 struct window
*w_ptr
= XWINDOW (w
);
1243 if (NILP (best_window
) ||
1244 (XFASTINT (w_ptr
->height
) * XFASTINT (w_ptr
->width
))
1245 > (XFASTINT (best_window_ptr
->height
)
1246 * XFASTINT (best_window_ptr
->width
)))
1252 if (EQ (XWINDOW (w
)->buffer
, obj
))
1254 /* Find another buffer to show in this window. */
1255 Lisp_Object another_buffer
= Fother_buffer (obj
, Qnil
);
1256 if (NILP (another_buffer
))
1258 = Fget_buffer_create (build_string ("*scratch*"));
1259 Fset_window_buffer (w
, another_buffer
);
1260 if (EQ (w
, selected_window
))
1261 Fset_buffer (XWINDOW (w
)->buffer
);
1266 if (EQ (w
, last_window
))
1275 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1276 "Return the window least recently selected or used for display.\n\
1277 If optional argument FRAME is `visible', search all visible frames.\n\
1278 If FRAME is t, search all frames.\n\
1279 If FRAME is nil, search only the selected frame.\n\
1280 If FRAME is a frame, search only that frame.")
1284 register Lisp_Object w
;
1285 /* First try for a window that is full-width */
1286 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1287 if (!NILP (w
) && !EQ (w
, selected_window
))
1289 /* If none of them, try the rest */
1290 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1293 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1294 "Return the largest window in area.\n\
1295 If optional argument FRAME is `visible', search all visible frames.\n\
1296 If FRAME is t, search all frames.\n\
1297 If FRAME is nil, search only the selected frame.\n\
1298 If FRAME is a frame, search only that frame.")
1302 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1306 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1307 "Return a window currently displaying BUFFER, or nil if none.\n\
1308 If optional argument FRAME is `visible', search all visible frames.\n\
1309 If FRAME is t, search all frames.\n\
1310 If FRAME is nil, search only the selected frame.\n\
1311 If FRAME is a frame, search only that frame.")
1313 Lisp_Object buffer
, frame
;
1315 buffer
= Fget_buffer (buffer
);
1316 if (XTYPE (buffer
) == Lisp_Buffer
)
1317 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1322 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1324 "Make WINDOW (or the selected window) fill its frame.\n\
1325 Only the frame WINDOW is on is affected.\n\
1326 This function tries to reduce display jumps\n\
1327 by keeping the text previously visible in WINDOW\n\
1328 in the same place on the frame. Doing this depends on\n\
1329 the value of (window-start WINDOW), so if calling this function\n\
1330 in a program gives strange scrolling, make sure the window-start\n\
1331 value is reasonable when this function is called.")
1336 struct buffer
*obuf
= current_buffer
;
1341 window
= selected_window
;
1343 CHECK_LIVE_WINDOW (window
, 0);
1345 w
= XWINDOW (window
);
1346 top
= XFASTINT (w
->top
);
1348 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1350 Fset_buffer (w
->buffer
);
1352 SET_PT (marker_position (w
->start
));
1353 /* Like Frecenter but avoid setting w->force_start. */
1354 Fvertical_motion (make_number (- (top
- FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w
))))),
1356 Fset_marker (w
->start
, make_number (PT
), w
->buffer
);
1357 w
->start_at_line_beg
= Fbolp ();
1360 set_buffer_internal (obuf
);
1364 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1365 1, 2, "bDelete windows on (buffer): ",
1366 "Delete all windows showing BUFFER.\n\
1367 Optional second argument FRAME controls which frames are affected.\n\
1368 If nil or omitted, delete all windows showing BUFFER in any frame.\n\
1369 If t, delete only windows showing BUFFER in the selected frame.\n\
1370 If `visible', delete all windows showing BUFFER in any visible frame.\n\
1371 If a frame, delete only windows showing BUFFER in that frame.")
1373 Lisp_Object buffer
, frame
;
1376 /* FRAME uses t and nil to mean the opposite of what window_loop
1378 if (! FRAMEP (frame
))
1379 frame
= NILP (frame
) ? Qt
: Qnil
;
1386 buffer
= Fget_buffer (buffer
);
1387 CHECK_BUFFER (buffer
, 0);
1388 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1393 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1394 Sreplace_buffer_in_windows
,
1395 1, 1, "bReplace buffer in windows: ",
1396 "Replace BUFFER with some other buffer in all windows showing it.")
1402 buffer
= Fget_buffer (buffer
);
1403 CHECK_BUFFER (buffer
, 0);
1404 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1409 /* Set the height of WINDOW and all its inferiors. */
1411 /* The smallest acceptable dimensions for a window. Anything smaller
1412 might crash Emacs. */
1413 #define MIN_SAFE_WINDOW_WIDTH (2)
1414 #define MIN_SAFE_WINDOW_HEIGHT (2)
1416 /* Make sure that window_min_height and window_min_width are
1417 not too small; if they are, set them to safe minima. */
1420 check_min_window_sizes ()
1422 /* Smaller values might permit a crash. */
1423 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1424 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1425 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1426 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1429 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1430 minimum allowable size. */
1432 check_frame_size (frame
, rows
, cols
)
1436 /* For height, we have to see:
1437 whether the frame has a minibuffer,
1438 whether it wants a mode line, and
1439 whether it has a menu bar. */
1441 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1442 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1443 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1444 if (FRAME_MENU_BAR_LINES (frame
) > 0)
1445 min_height
+= FRAME_MENU_BAR_LINES (frame
);
1447 if (*rows
< min_height
)
1449 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
1450 *cols
= MIN_SAFE_WINDOW_WIDTH
;
1453 /* Normally the window is deleted if it gets too small.
1454 nodelete nonzero means do not do this.
1455 (The caller should check later and do so if appropriate) */
1457 set_window_height (window
, height
, nodelete
)
1462 register struct window
*w
= XWINDOW (window
);
1463 register struct window
*c
;
1464 int oheight
= XFASTINT (w
->height
);
1465 int top
, pos
, lastbot
, opos
, lastobot
;
1468 check_min_window_sizes ();
1471 && ! NILP (w
->parent
)
1472 && height
< window_min_height
)
1474 Fdelete_window (window
);
1478 XFASTINT (w
->last_modified
) = 0;
1479 windows_or_buffers_changed
++;
1480 XFASTINT (w
->height
) = height
;
1481 if (!NILP (w
->hchild
))
1483 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1485 XWINDOW (child
)->top
= w
->top
;
1486 set_window_height (child
, height
, nodelete
);
1489 else if (!NILP (w
->vchild
))
1491 lastbot
= top
= XFASTINT (w
->top
);
1493 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
1495 c
= XWINDOW (child
);
1497 opos
= lastobot
+ XFASTINT (c
->height
);
1499 XFASTINT (c
->top
) = lastbot
;
1501 pos
= (((opos
* height
) << 1) + oheight
) / (oheight
<< 1);
1503 /* Avoid confusion: inhibit deletion of child if becomes too small */
1504 set_window_height (child
, pos
+ top
- lastbot
, 1);
1506 /* Now advance child to next window,
1507 and set lastbot if child was not just deleted. */
1508 lastbot
= pos
+ top
;
1511 /* Now delete any children that became too small. */
1513 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1515 set_window_height (child
, XINT (XWINDOW (child
)->height
), 0);
1520 /* Recursively set width of WINDOW and its inferiors. */
1522 set_window_width (window
, width
, nodelete
)
1527 register struct window
*w
= XWINDOW (window
);
1528 register struct window
*c
;
1529 int owidth
= XFASTINT (w
->width
);
1530 int left
, pos
, lastright
, opos
, lastoright
;
1533 if (!nodelete
&& width
< window_min_width
)
1535 Fdelete_window (window
);
1539 XFASTINT (w
->last_modified
) = 0;
1540 windows_or_buffers_changed
++;
1541 XFASTINT (w
->width
) = width
;
1542 if (!NILP (w
->vchild
))
1544 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1546 XWINDOW (child
)->left
= w
->left
;
1547 set_window_width (child
, width
, nodelete
);
1550 else if (!NILP (w
->hchild
))
1552 lastright
= left
= XFASTINT (w
->left
);
1554 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
1556 c
= XWINDOW (child
);
1558 opos
= lastoright
+ XFASTINT (c
->width
);
1560 XFASTINT (c
->left
) = lastright
;
1562 pos
= (((opos
* width
) << 1) + owidth
) / (owidth
<< 1);
1564 /* Inhibit deletion for becoming too small */
1565 set_window_width (child
, pos
+ left
- lastright
, 1);
1567 /* Now advance child to next window,
1568 and set lastright if child was not just deleted. */
1569 lastright
= pos
+ left
, lastoright
= opos
;
1571 /* Delete children that became too small */
1573 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1575 set_window_width (child
, XINT (XWINDOW (child
)->width
), 0);
1580 int window_select_count
;
1582 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
1583 "Make WINDOW display BUFFER as its contents.\n\
1584 BUFFER can be a buffer or buffer name.")
1586 register Lisp_Object window
, buffer
;
1588 register Lisp_Object tem
;
1589 register struct window
*w
= decode_window (window
);
1591 buffer
= Fget_buffer (buffer
);
1592 CHECK_BUFFER (buffer
, 1);
1594 if (NILP (XBUFFER (buffer
)->name
))
1595 error ("Attempt to display deleted buffer");
1599 error ("Window is deleted");
1600 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
1601 is first being set up. */
1603 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
1604 error ("Window is dedicated to %s\n", tem
);
1610 w
->window_end_pos
= 0;
1611 w
->window_end_valid
= Qnil
;
1613 Fset_marker (w
->pointm
,
1614 make_number (BUF_PT (XBUFFER (buffer
))),
1616 set_marker_restricted (w
->start
,
1617 make_number (XBUFFER (buffer
)->last_window_start
),
1619 w
->start_at_line_beg
= Qnil
;
1620 w
->force_start
= Qnil
;
1621 XFASTINT (w
->last_modified
) = 0;
1622 windows_or_buffers_changed
++;
1623 if (EQ (window
, selected_window
))
1624 Fset_buffer (buffer
);
1629 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
1630 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
1631 The main editor command loop selects the buffer of the selected window\n\
1632 before each command.")
1634 register Lisp_Object window
;
1636 register struct window
*w
;
1637 register struct window
*ow
= XWINDOW (selected_window
);
1639 CHECK_LIVE_WINDOW (window
, 0);
1641 w
= XWINDOW (window
);
1643 if (NILP (w
->buffer
))
1644 error ("Trying to select deleted window or non-leaf window");
1646 XFASTINT (w
->use_time
) = ++window_select_count
;
1647 if (EQ (window
, selected_window
))
1650 Fset_marker (ow
->pointm
, make_number (BUF_PT (XBUFFER (ow
->buffer
))),
1653 selected_window
= window
;
1655 if (XFRAME (WINDOW_FRAME (w
)) != selected_frame
)
1657 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
1658 Fhandle_switch_frame (WINDOW_FRAME (w
), Qnil
);
1661 selected_frame
->selected_window
= window
;
1664 record_buffer (w
->buffer
);
1665 Fset_buffer (w
->buffer
);
1667 /* Go to the point recorded in the window.
1668 This is important when the buffer is in more
1669 than one window. It also matters when
1670 redisplay_window has altered point after scrolling,
1671 because it makes the change only in the window. */
1673 register int new_point
= marker_position (w
->pointm
);
1674 if (new_point
< BEGV
)
1682 windows_or_buffers_changed
++;
1686 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 2,
1687 "BDisplay buffer: \nP",
1688 "Make BUFFER appear in some window but don't select it.\n\
1689 BUFFER can be a buffer or a buffer name.\n\
1690 If BUFFER is shown already in some window, just use that one,\n\
1691 unless the window is the selected window and the optional second\n\
1692 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
1693 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
1694 Returns the window displaying BUFFER.")
1695 (buffer
, not_this_window
)
1696 register Lisp_Object buffer
, not_this_window
;
1698 register Lisp_Object window
;
1700 buffer
= Fget_buffer (buffer
);
1701 CHECK_BUFFER (buffer
, 0);
1703 if (!NILP (Vdisplay_buffer_function
))
1704 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
1706 if (NILP (not_this_window
)
1707 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
1708 return selected_window
;
1710 /* If pop_up_frames,
1711 look for a window showing BUFFER on any visible frame. */
1712 window
= Fget_buffer_window (buffer
, pop_up_frames
? Qvisible
: Qnil
);
1714 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
1718 /* If there are no frames open that have more than a minibuffer,
1719 we need to create a new frame. */
1720 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
1723 = Fframe_selected_window (call0 (Vpop_up_frame_function
));
1724 Fset_window_buffer (window
, buffer
);
1726 Fhandle_switch_frame (XWINDOW (window
)->frame
, Qnil
);
1730 #endif /* MULTI_FRAME */
1734 || FRAME_MINIBUF_ONLY_P (selected_frame
)
1738 Lisp_Object frames
= Qnil
;
1741 if (FRAME_MINIBUF_ONLY_P (selected_frame
))
1742 XSET (frames
, Lisp_Frame
, last_nonminibuf_frame
);
1744 /* Don't try to create a window if would get an error */
1745 if (split_height_threshold
< window_min_height
<< 1)
1746 split_height_threshold
= window_min_height
<< 1;
1748 window
= Fget_largest_window (frames
);
1751 && window_height (window
) >= split_height_threshold
1752 && (XFASTINT (XWINDOW (window
)->width
)
1753 == FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (window
))))))
1754 window
= Fsplit_window (window
, Qnil
, Qnil
);
1757 window
= Fget_lru_window (frames
);
1758 if ((EQ (window
, selected_window
)
1759 || EQ (XWINDOW (window
)->parent
, Qnil
))
1760 && window_height (window
) >= window_min_height
<< 1)
1761 window
= Fsplit_window (window
, Qnil
, Qnil
);
1765 window
= Fget_lru_window (Qnil
);
1767 Fset_window_buffer (window
, buffer
);
1772 temp_output_buffer_show (buf
)
1773 register Lisp_Object buf
;
1775 register struct buffer
*old
= current_buffer
;
1776 register Lisp_Object window
;
1777 register struct window
*w
;
1780 XBUFFER (buf
)->save_modified
= MODIFF
;
1785 set_buffer_internal (old
);
1787 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
1788 call1 (Vtemp_buffer_show_function
, buf
);
1791 window
= Fdisplay_buffer (buf
, Qnil
);
1794 if (XFRAME (XWINDOW (window
)->frame
) != selected_frame
)
1795 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
1796 #endif /* MULTI_FRAME */
1797 Vminibuf_scroll_window
= window
;
1798 w
= XWINDOW (window
);
1799 XFASTINT (w
->hscroll
) = 0;
1800 set_marker_restricted (w
->start
, make_number (1), buf
);
1801 set_marker_restricted (w
->pointm
, make_number (1), buf
);
1806 make_dummy_parent (window
)
1809 register Lisp_Object old
, new;
1810 register struct window
*o
, *p
;
1813 XSETTYPE (old
, Lisp_Vector
);
1814 new = Fcopy_sequence (old
);
1815 XSETTYPE (new, Lisp_Window
);
1819 XFASTINT (p
->sequence_number
) = ++sequence_number
;
1821 /* Put new into window structure in place of window */
1822 replace_window (window
, new);
1835 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
1836 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
1837 WINDOW defaults to selected one and SIZE to half its size.\n\
1838 If optional third arg HOR-FLAG is non-nil, split side by side\n\
1839 and put SIZE columns in the first of the pair.")
1840 (window
, chsize
, horflag
)
1841 Lisp_Object window
, chsize
, horflag
;
1843 register Lisp_Object
new;
1844 register struct window
*o
, *p
;
1848 window
= selected_window
;
1850 CHECK_LIVE_WINDOW (window
, 0);
1852 o
= XWINDOW (window
);
1856 if (!NILP (horflag
))
1857 /* Round odd size up, since this is for the left-hand window,
1858 and it will lose a column for the separators. */
1859 size
= ((XFASTINT (o
->width
) + 1) & -2) >> 1;
1861 size
= XFASTINT (o
->height
) >> 1;
1865 CHECK_NUMBER (chsize
, 1);
1866 size
= XINT (chsize
);
1869 if (MINI_WINDOW_P (o
))
1870 error ("Attempt to split minibuffer window");
1871 else if (FRAME_NO_SPLIT_P (XFRAME (WINDOW_FRAME (o
))))
1872 error ("Attempt to split unsplittable frame");
1874 check_min_window_sizes ();
1878 if (size
< window_min_height
1879 || size
+ window_min_height
> XFASTINT (o
->height
))
1880 args_out_of_range_3 (window
, chsize
, horflag
);
1881 if (NILP (o
->parent
)
1882 || NILP (XWINDOW (o
->parent
)->vchild
))
1884 make_dummy_parent (window
);
1886 XWINDOW (new)->vchild
= window
;
1891 if (size
< window_min_width
1892 || size
+ window_min_width
> XFASTINT (o
->width
))
1893 args_out_of_range_3 (window
, chsize
, horflag
);
1894 if (NILP (o
->parent
)
1895 || NILP (XWINDOW (o
->parent
)->hchild
))
1897 make_dummy_parent (window
);
1899 XWINDOW (new)->hchild
= window
;
1903 /* Now we know that window's parent is a vertical combination
1904 if we are dividing vertically, or a horizontal combination
1905 if we are making side-by-side windows */
1907 windows_or_buffers_changed
++;
1908 new = make_window ();
1911 p
->frame
= o
->frame
;
1913 if (!NILP (p
->next
))
1914 XWINDOW (p
->next
)->prev
= new;
1917 p
->parent
= o
->parent
;
1920 Fset_window_buffer (new, o
->buffer
);
1922 /* Apportion the available frame space among the two new windows */
1924 if (!NILP (horflag
))
1926 p
->height
= o
->height
;
1928 XFASTINT (p
->width
) = XFASTINT (o
->width
) - size
;
1929 XFASTINT (o
->width
) = size
;
1930 XFASTINT (p
->left
) = XFASTINT (o
->left
) + size
;
1935 p
->width
= o
->width
;
1936 XFASTINT (p
->height
) = XFASTINT (o
->height
) - size
;
1937 XFASTINT (o
->height
) = size
;
1938 XFASTINT (p
->top
) = XFASTINT (o
->top
) + size
;
1944 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
1945 "Make current window ARG lines bigger.\n\
1946 From program, optional second arg non-nil means grow sideways ARG columns.")
1948 register Lisp_Object n
, side
;
1950 CHECK_NUMBER (n
, 0);
1951 change_window_height (XINT (n
), !NILP (side
));
1955 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
1956 "Make current window ARG lines smaller.\n\
1957 From program, optional second arg non-nil means shrink sideways ARG columns.")
1959 register Lisp_Object n
, side
;
1961 CHECK_NUMBER (n
, 0);
1962 change_window_height (-XINT (n
), !NILP (side
));
1967 window_height (window
)
1970 register struct window
*p
= XWINDOW (window
);
1971 return XFASTINT (p
->height
);
1975 window_width (window
)
1978 register struct window
*p
= XWINDOW (window
);
1979 return XFASTINT (p
->width
);
1982 #define MINSIZE(w) \
1984 ? window_min_width \
1985 : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height))
1988 *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top))
1990 #define CURSIZE(w) \
1991 *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height))
1993 /* Unlike set_window_height, this function
1994 also changes the heights of the siblings so as to
1995 keep everything consistent. */
1997 change_window_height (delta
, widthflag
)
2001 register Lisp_Object parent
;
2003 register struct window
*p
;
2005 int (*sizefun
) () = widthflag
? window_width
: window_height
;
2006 register int (*setsizefun
) () = (widthflag
2008 : set_window_height
);
2010 check_min_window_sizes ();
2012 window
= selected_window
;
2015 p
= XWINDOW (window
);
2020 error ("No other window to side of this one");
2023 if (widthflag
? !NILP (XWINDOW (parent
)->hchild
)
2024 : !NILP (XWINDOW (parent
)->vchild
))
2029 sizep
= &CURSIZE (window
);
2031 if (*sizep
+ delta
< MINSIZE (window
))
2033 Fdelete_window (window
);
2038 register int maxdelta
;
2040 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - *sizep
2041 : !NILP (p
->next
) ? (*sizefun
) (p
->next
) - MINSIZE (p
->next
)
2042 : !NILP (p
->prev
) ? (*sizefun
) (p
->prev
) - MINSIZE (p
->prev
)
2043 /* This is a frame with only one window, a minibuffer-only
2044 or a minibufferless frame. */
2047 if (delta
> maxdelta
)
2048 /* This case traps trying to make the minibuffer
2049 the full frame, or make the only window aside from the
2050 minibuffer the full frame. */
2057 if (!NILP (p
->next
) &&
2058 (*sizefun
) (p
->next
) - delta
>= MINSIZE (p
->next
))
2060 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
) - delta
, 0);
2061 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2062 CURBEG (p
->next
) += delta
;
2063 /* This does not change size of p->next,
2064 but it propagates the new top edge to its children */
2065 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
), 0);
2067 else if (!NILP (p
->prev
) &&
2068 (*sizefun
) (p
->prev
) - delta
>= MINSIZE (p
->prev
))
2070 (*setsizefun
) (p
->prev
, (*sizefun
) (p
->prev
) - delta
, 0);
2071 CURBEG (window
) -= delta
;
2072 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2076 register int delta1
;
2077 register int opht
= (*sizefun
) (parent
);
2079 /* If trying to grow this window to or beyond size of the parent,
2080 make delta1 so big that, on shrinking back down,
2081 all the siblings end up with less than one line and are deleted. */
2082 if (opht
<= *sizep
+ delta
)
2083 delta1
= opht
* opht
* 2;
2084 /* Otherwise, make delta1 just right so that if we add delta1
2085 lines to this window and to the parent, and then shrink
2086 the parent back to its original size, the new proportional
2087 size of this window will increase by delta. */
2089 delta1
= (delta
* opht
* 100) / ((opht
- *sizep
- delta
) * 100);
2091 /* Add delta1 lines or columns to this window, and to the parent,
2092 keeping things consistent while not affecting siblings. */
2093 CURSIZE (parent
) = opht
+ delta1
;
2094 (*setsizefun
) (window
, *sizep
+ delta1
, 0);
2096 /* Squeeze out delta1 lines or columns from our parent,
2097 shriking this window and siblings proportionately.
2098 This brings parent back to correct size.
2099 Delta1 was calculated so this makes this window the desired size,
2100 taking it all out of the siblings. */
2101 (*setsizefun
) (parent
, opht
, 0);
2104 XFASTINT (p
->last_modified
) = 0;
2111 /* Return number of lines of text (not counting mode line) in W. */
2114 window_internal_height (w
)
2117 int ht
= XFASTINT (w
->height
);
2119 if (MINI_WINDOW_P (w
))
2122 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
2123 || !NILP (w
->next
) || !NILP (w
->prev
)
2124 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
2131 /* Return the number of columns in W.
2132 Don't count columns occupied by scroll bars or the vertical bar
2133 separating W from the sibling to its right. */
2135 window_internal_width (w
)
2138 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
2139 int left
= XINT (w
->left
);
2140 int width
= XINT (w
->width
);
2142 /* If this window is flush against the right edge of the frame, its
2143 internal width is its full width. */
2144 if (left
+ width
>= FRAME_WIDTH (f
))
2147 /* If we are not flush right, then our rightmost columns are
2148 occupied by some sort of separator. */
2150 /* Scroll bars occupy a few columns. */
2151 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2152 return width
- VERTICAL_SCROLL_BAR_WIDTH
;
2154 /* The column of `|' characters separating side-by-side windows
2155 occupies one column only. */
2160 /* Scroll contents of window WINDOW up N lines. */
2163 window_scroll (window
, n
, noerror
)
2168 register struct window
*w
= XWINDOW (window
);
2169 register int opoint
= point
;
2171 register int ht
= window_internal_height (w
);
2172 register Lisp_Object tem
;
2174 Lisp_Object bolp
, nmoved
;
2176 XFASTINT (tem
) = point
;
2177 tem
= Fpos_visible_in_window_p (tem
, window
);
2181 Fvertical_motion (make_number (- (ht
/ 2)), window
);
2182 XFASTINT (tem
) = point
;
2183 Fset_marker (w
->start
, tem
, w
->buffer
);
2184 w
->force_start
= Qt
;
2187 SET_PT (marker_position (w
->start
));
2188 lose
= n
< 0 && point
== BEGV
;
2189 Fvertical_motion (make_number (n
), window
);
2199 Fsignal (Qbeginning_of_buffer
, Qnil
);
2204 set_marker_restricted (w
->start
, make_number (pos
), w
->buffer
);
2205 w
->start_at_line_beg
= bolp
;
2206 w
->update_mode_line
= Qt
;
2207 XFASTINT (w
->last_modified
) = 0;
2213 tem
= Fvertical_motion (make_number (ht
), window
);
2214 if (point
> opoint
|| XFASTINT (tem
) < ht
)
2217 Fvertical_motion (make_number (-1), window
);
2225 Fsignal (Qend_of_buffer
, Qnil
);
2229 /* This is the guts of Fscroll_up and Fscroll_down. */
2232 scroll_command (n
, direction
)
2233 register Lisp_Object n
;
2236 register int defalt
;
2237 int count
= specpdl_ptr
- specpdl
;
2239 /* If selected window's buffer isn't current, make it current for the moment.
2240 But don't screw up if window_scroll gets an error. */
2241 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
2243 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2244 Fset_buffer (XWINDOW (selected_window
)->buffer
);
2247 defalt
= (window_internal_height (XWINDOW (selected_window
))
2248 - next_screen_context_lines
);
2249 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
2252 window_scroll (selected_window
, defalt
, 0);
2253 else if (EQ (n
, Qminus
))
2254 window_scroll (selected_window
, - defalt
, 0);
2257 n
= Fprefix_numeric_value (n
);
2258 window_scroll (selected_window
, XINT (n
) * direction
, 0);
2261 unbind_to (count
, Qnil
);
2264 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
2265 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
2266 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2267 When calling from a program, supply a number as argument or nil.")
2271 scroll_command (n
, 1);
2275 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
2276 "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\
2277 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2278 When calling from a program, supply a number as argument or nil.")
2282 scroll_command (n
, -1);
2286 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
2287 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
2288 The next window is the one below the current one; or the one at the top\n\
2289 if the current one is at the bottom.\n\
2290 When calling from a program, supply a number as argument or nil.\n\
2292 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
2293 specifies the window to scroll.\n\
2294 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
2295 showing that buffer, popping the buffer up if necessary.")
2297 register Lisp_Object n
;
2299 register Lisp_Object window
;
2301 register struct window
*w
;
2302 register int count
= specpdl_ptr
- specpdl
;
2304 if (MINI_WINDOW_P (XWINDOW (selected_window
))
2305 && !NILP (Vminibuf_scroll_window
))
2306 window
= Vminibuf_scroll_window
;
2307 /* If buffer is specified, scroll that buffer. */
2308 else if (!NILP (Vother_window_scroll_buffer
))
2310 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
2312 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
);
2316 /* Nothing specified; look for a neighboring window on the same
2318 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
2320 if (EQ (window
, selected_window
))
2321 /* That didn't get us anywhere; look for a window on another
2324 window
= Fnext_window (window
, Qnil
, Qt
);
2325 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
2326 && ! EQ (window
, selected_window
));
2329 CHECK_LIVE_WINDOW (window
, 0);
2331 if (EQ (window
, selected_window
))
2332 error ("There is no other window");
2334 w
= XWINDOW (window
);
2335 ht
= window_internal_height (w
);
2337 /* Don't screw up if window_scroll gets an error. */
2338 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2340 Fset_buffer (w
->buffer
);
2341 SET_PT (marker_position (w
->pointm
));
2344 window_scroll (window
, ht
- next_screen_context_lines
, 1);
2345 else if (EQ (n
, Qminus
))
2346 window_scroll (window
, next_screen_context_lines
- ht
, 1);
2349 if (XTYPE (n
) == Lisp_Cons
)
2351 CHECK_NUMBER (n
, 0);
2352 window_scroll (window
, XINT (n
), 1);
2355 Fset_marker (w
->pointm
, make_number (point
), Qnil
);
2356 unbind_to (count
, Qnil
);
2361 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
2362 "Scroll selected window display ARG columns left.\n\
2363 Default for ARG is window width minus 2.")
2365 register Lisp_Object arg
;
2369 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2371 arg
= Fprefix_numeric_value (arg
);
2374 Fset_window_hscroll (selected_window
,
2375 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2379 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
2380 "Scroll selected window display ARG columns right.\n\
2381 Default for ARG is window width minus 2.")
2383 register Lisp_Object arg
;
2386 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2388 arg
= Fprefix_numeric_value (arg
);
2391 Fset_window_hscroll (selected_window
,
2392 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2396 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
2397 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
2398 The desired position of point is always relative to the current window.\n\
2399 Just C-u as prefix means put point in the center of the window.\n\
2400 No arg (i.e., it is nil) erases the entire frame and then\n\
2401 redraws with point in the center of the current window.")
2403 register Lisp_Object n
;
2405 register struct window
*w
= XWINDOW (selected_window
);
2406 register int ht
= window_internal_height (w
);
2407 register int opoint
= point
;
2412 extern int frame_garbaged
;
2414 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
2415 XFASTINT (n
) = ht
/ 2;
2417 else if (XTYPE (n
) == Lisp_Cons
) /* Just C-u. */
2419 XFASTINT (n
) = ht
/ 2;
2423 n
= Fprefix_numeric_value (n
);
2424 CHECK_NUMBER (n
, 0);
2428 XSETINT (n
, XINT (n
) + ht
);
2430 XSETINT (n
, - XINT (n
));
2432 XSET (window
, Lisp_Window
, w
);
2433 Fvertical_motion (n
, window
);
2434 Fset_marker (w
->start
, make_number (point
), w
->buffer
);
2435 w
->start_at_line_beg
= Fbolp ();
2438 w
->force_start
= Qt
;
2443 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
2445 "Position point relative to window.\n\
2446 With no argument, position text at center of window.\n\
2447 An argument specifies frame line; zero means top of window,\n\
2448 negative means relative to bottom of window.")
2450 register Lisp_Object arg
;
2452 register struct window
*w
= XWINDOW (selected_window
);
2453 register int height
= window_internal_height (w
);
2458 XFASTINT (arg
) = height
/ 2;
2461 arg
= Fprefix_numeric_value (arg
);
2463 XSETINT (arg
, XINT (arg
) + height
);
2466 start
= marker_position (w
->start
);
2467 XSET (window
, Lisp_Window
, w
);
2468 if (start
< BEGV
|| start
> ZV
)
2470 Fvertical_motion (make_number (- (height
/ 2)), window
);
2471 Fset_marker (w
->start
, make_number (point
), w
->buffer
);
2472 w
->start_at_line_beg
= Fbolp ();
2473 w
->force_start
= Qt
;
2478 return Fvertical_motion (arg
, window
);
2481 struct save_window_data
2483 int size_from_Lisp_Vector_struct
;
2484 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2485 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
2486 Lisp_Object selected_frame
;
2487 Lisp_Object current_window
;
2488 Lisp_Object current_buffer
;
2489 Lisp_Object minibuf_scroll_window
;
2490 Lisp_Object root_window
;
2491 Lisp_Object focus_frame
;
2492 /* A vector, interpreted as a struct saved_window */
2493 Lisp_Object saved_windows
;
2496 /* Arg to Fmake_vector */
2497 #define SAVE_WINDOW_DATA_SIZE \
2498 ((sizeof (struct save_window_data) \
2499 - (sizeof (struct Lisp_Vector) \
2500 /* Don't count the contents member of the struct Lisp_Vector */ \
2501 - sizeof (Lisp_Object))) \
2502 / sizeof (Lisp_Object))
2504 /* This is saved as a Lisp_Vector */
2507 /* these first two must agree with struct Lisp_Vector in lisp.h */
2508 int size_from_Lisp_Vector_struct
;
2509 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2512 Lisp_Object buffer
, start
, pointm
, mark
;
2513 Lisp_Object left
, top
, width
, height
, hscroll
;
2514 Lisp_Object parent
, prev
;
2515 Lisp_Object start_at_line_beg
;
2516 Lisp_Object display_table
;
2518 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
2520 #define SAVED_WINDOW_N(swv,n) \
2521 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
2523 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
2524 "T if OBJECT is a window-configration object.")
2528 if (XTYPE (obj
) == Lisp_Window_Configuration
)
2534 DEFUN ("set-window-configuration", Fset_window_configuration
,
2535 Sset_window_configuration
, 1, 1, 0,
2536 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
2537 CONFIGURATION must be a value previously returned\n\
2538 by `current-window-configuration' (which see).")
2540 Lisp_Object configuration
;
2542 register struct save_window_data
*data
;
2543 struct Lisp_Vector
*saved_windows
;
2544 Lisp_Object new_current_buffer
;
2548 while (XTYPE (configuration
) != Lisp_Window_Configuration
)
2550 configuration
= wrong_type_argument (intern ("window-configuration-p"),
2554 data
= (struct save_window_data
*) XVECTOR (configuration
);
2555 saved_windows
= XVECTOR (data
->saved_windows
);
2557 new_current_buffer
= data
->current_buffer
;
2558 if (NILP (XBUFFER (new_current_buffer
)->name
))
2559 new_current_buffer
= Qnil
;
2561 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
2564 /* If f is a dead frame, don't bother rebuilding its window tree.
2565 However, there is other stuff we should still try to do below. */
2566 if (FRAME_LIVE_P (f
))
2568 register struct window
*w
;
2569 register struct saved_window
*p
;
2572 /* If the frame has been resized since this window configuration was
2573 made, we change the frame to the size specified in the
2574 configuration, restore the configuration, and then resize it
2575 back. We keep track of the prevailing height in these variables. */
2576 int previous_frame_height
= FRAME_HEIGHT (f
);
2577 int previous_frame_width
= FRAME_WIDTH (f
);
2578 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
2580 if (XFASTINT (data
->frame_height
) != previous_frame_height
2581 || XFASTINT (data
->frame_width
) != previous_frame_width
)
2582 change_frame_size (f
, data
->frame_height
, data
->frame_width
, 0, 0);
2583 if (XFASTINT (data
->frame_menu_bar_lines
)
2584 != previous_frame_menu_bar_lines
)
2585 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, 0);
2587 windows_or_buffers_changed
++;
2590 Mark all windows now on frame as "deleted".
2591 Restoring the new configuration "undeletes" any that are in it.
2593 Save their current buffers in their height fields, since we may
2594 need it later, if a buffer saved in the configuration is now
2596 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2598 for (k
= 0; k
< saved_windows
->size
; k
++)
2600 p
= SAVED_WINDOW_N (saved_windows
, k
);
2601 w
= XWINDOW (p
->window
);
2604 if (!NILP (p
->parent
))
2605 w
->parent
= SAVED_WINDOW_N (saved_windows
,
2606 XFASTINT (p
->parent
))->window
;
2610 if (!NILP (p
->prev
))
2612 w
->prev
= SAVED_WINDOW_N (saved_windows
,
2613 XFASTINT (p
->prev
))->window
;
2614 XWINDOW (w
->prev
)->next
= p
->window
;
2619 if (!NILP (w
->parent
))
2621 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
2623 XWINDOW (w
->parent
)->vchild
= p
->window
;
2624 XWINDOW (w
->parent
)->hchild
= Qnil
;
2628 XWINDOW (w
->parent
)->hchild
= p
->window
;
2629 XWINDOW (w
->parent
)->vchild
= Qnil
;
2634 /* If we squirreled away the buffer in the window's height,
2636 if (XTYPE (w
->height
) == Lisp_Buffer
)
2637 w
->buffer
= w
->height
;
2640 w
->width
= p
->width
;
2641 w
->height
= p
->height
;
2642 w
->hscroll
= p
->hscroll
;
2643 w
->display_table
= p
->display_table
;
2644 XFASTINT (w
->last_modified
) = 0;
2646 /* Reinstall the saved buffer and pointers into it. */
2647 if (NILP (p
->buffer
))
2648 w
->buffer
= p
->buffer
;
2651 if (!NILP (XBUFFER (p
->buffer
)->name
))
2652 /* If saved buffer is alive, install it. */
2654 w
->buffer
= p
->buffer
;
2655 w
->start_at_line_beg
= p
->start_at_line_beg
;
2656 set_marker_restricted (w
->start
,
2657 Fmarker_position (p
->start
),
2659 set_marker_restricted (w
->pointm
,
2660 Fmarker_position (p
->pointm
),
2662 Fset_marker (XBUFFER (w
->buffer
)->mark
,
2663 Fmarker_position (p
->mark
), w
->buffer
);
2665 /* As documented in Fcurrent_window_configuration, don't
2666 save the location of point in the buffer which was current
2667 when the window configuration was recorded. */
2668 if (!EQ (p
->buffer
, new_current_buffer
) &&
2669 XBUFFER (p
->buffer
) == current_buffer
)
2670 Fgoto_char (w
->pointm
);
2672 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
2673 /* Else unless window has a live buffer, get one. */
2675 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
2676 /* This will set the markers to beginning of visible
2678 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
2679 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
2680 w
->start_at_line_beg
= Qt
;
2683 /* Keeping window's old buffer; make sure the markers
2686 /* Set window markers at start of visible range. */
2687 if (XMARKER (w
->start
)->buffer
== 0)
2688 set_marker_restricted (w
->start
, make_number (0),
2690 if (XMARKER (w
->pointm
)->buffer
== 0)
2691 set_marker_restricted (w
->pointm
,
2693 (BUF_PT (XBUFFER (w
->buffer
)))),
2695 w
->start_at_line_beg
= Qt
;
2700 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
2701 Fselect_window (data
->current_window
);
2704 if (NILP (data
->focus_frame
)
2705 || (XTYPE (data
->focus_frame
) == Lisp_Frame
2706 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
2707 Fredirect_frame_focus (frame
, data
->focus_frame
);
2710 #if 0 /* I don't understand why this is needed, and it causes problems
2711 when the frame's old selected window has been deleted. */
2713 if (f
!= selected_frame
&& ! FRAME_TERMCAP_P (f
))
2714 Fhandle_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)), Qnil
);
2718 /* Set the screen height to the value it had before this function. */
2719 if (previous_frame_height
!= FRAME_HEIGHT (f
)
2720 || previous_frame_width
!= FRAME_WIDTH (f
))
2721 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
2723 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
2724 x_set_menu_bar_lines (f
, previous_frame_menu_bar_lines
, 0);
2728 /* Fselect_window will have made f the selected frame, so we
2729 reselect the proper frame here. Fhandle_switch_frame will change the
2730 selected window too, but that doesn't make the call to
2731 Fselect_window above totally superfluous; it still sets f's
2733 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
2734 Fhandle_switch_frame (data
->selected_frame
, Qnil
);
2737 if (!NILP (new_current_buffer
))
2738 Fset_buffer (new_current_buffer
);
2740 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
2744 /* Mark all windows now on frame as deleted
2745 by setting their buffers to nil. */
2748 delete_all_subwindows (w
)
2749 register struct window
*w
;
2751 if (!NILP (w
->next
))
2752 delete_all_subwindows (XWINDOW (w
->next
));
2753 if (!NILP (w
->vchild
))
2754 delete_all_subwindows (XWINDOW (w
->vchild
));
2755 if (!NILP (w
->hchild
))
2756 delete_all_subwindows (XWINDOW (w
->hchild
));
2758 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
2760 /* We set all three of these fields to nil, to make sure that we can
2761 distinguish this dead window from any live window. Live leaf
2762 windows will have buffer set, and combination windows will have
2763 vchild or hchild set. */
2770 count_windows (window
)
2771 register struct window
*window
;
2773 register int count
= 1;
2774 if (!NILP (window
->next
))
2775 count
+= count_windows (XWINDOW (window
->next
));
2776 if (!NILP (window
->vchild
))
2777 count
+= count_windows (XWINDOW (window
->vchild
));
2778 if (!NILP (window
->hchild
))
2779 count
+= count_windows (XWINDOW (window
->hchild
));
2784 save_window_save (window
, vector
, i
)
2786 struct Lisp_Vector
*vector
;
2789 register struct saved_window
*p
;
2790 register struct window
*w
;
2791 register Lisp_Object tem
;
2793 for (;!NILP (window
); window
= w
->next
)
2795 p
= SAVED_WINDOW_N (vector
, i
);
2796 w
= XWINDOW (window
);
2798 XFASTINT (w
->temslot
) = i
++;
2800 p
->buffer
= w
->buffer
;
2803 p
->width
= w
->width
;
2804 p
->height
= w
->height
;
2805 p
->hscroll
= w
->hscroll
;
2806 p
->display_table
= w
->display_table
;
2807 if (!NILP (w
->buffer
))
2809 /* Save w's value of point in the window configuration.
2810 If w is the selected window, then get the value of point
2811 from the buffer; pointm is garbage in the selected window. */
2812 if (EQ (window
, selected_window
))
2814 p
->pointm
= Fmake_marker ();
2815 Fset_marker (p
->pointm
, BUF_PT (XBUFFER (w
->buffer
)),
2819 p
->pointm
= Fcopy_marker (w
->pointm
);
2821 p
->start
= Fcopy_marker (w
->start
);
2822 p
->start_at_line_beg
= w
->start_at_line_beg
;
2824 tem
= XBUFFER (w
->buffer
)->mark
;
2825 p
->mark
= Fcopy_marker (tem
);
2832 p
->start_at_line_beg
= Qnil
;
2835 if (NILP (w
->parent
))
2838 p
->parent
= XWINDOW (w
->parent
)->temslot
;
2843 p
->prev
= XWINDOW (w
->prev
)->temslot
;
2845 if (!NILP (w
->vchild
))
2846 i
= save_window_save (w
->vchild
, vector
, i
);
2847 if (!NILP (w
->hchild
))
2848 i
= save_window_save (w
->hchild
, vector
, i
);
2854 DEFUN ("current-window-configuration",
2855 Fcurrent_window_configuration
, Scurrent_window_configuration
, 0, 1, 0,
2856 "Return an object representing the current window configuration of FRAME.\n\
2857 If FRAME is nil or omitted, use the selected frame.\n\
2858 This describes the number of windows, their sizes and current buffers,\n\
2859 and for each displayed buffer, where display starts, and the positions of\n\
2860 point and mark. An exception is made for point in the current buffer:\n\
2861 its value is -not- saved.\n\
2862 This also records the currently selected frame, and FRAME's focus\n\
2863 redirection (see `redirect-frame-focus').")
2867 register Lisp_Object tem
;
2868 register int n_windows
;
2869 register struct save_window_data
*data
;
2877 CHECK_LIVE_FRAME (frame
, 0);
2881 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2882 data
= (struct save_window_data
*)
2883 XVECTOR (Fmake_vector (make_number (SAVE_WINDOW_DATA_SIZE
),
2885 XFASTINT (data
->frame_width
) = FRAME_WIDTH (f
);
2886 XFASTINT (data
->frame_height
) = FRAME_HEIGHT (f
);
2887 XFASTINT (data
->frame_menu_bar_lines
) = FRAME_MENU_BAR_LINES (f
);
2889 XSET (data
->selected_frame
, Lisp_Frame
, selected_frame
);
2891 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
2892 XSET (data
->current_buffer
, Lisp_Buffer
, current_buffer
);
2893 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
2894 data
->root_window
= FRAME_ROOT_WINDOW (f
);
2895 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
2896 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
2897 data
->saved_windows
= tem
;
2898 for (i
= 0; i
< n_windows
; i
++)
2899 XVECTOR (tem
)->contents
[i
]
2900 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
2901 save_window_save (FRAME_ROOT_WINDOW (f
),
2903 XSET (tem
, Lisp_Window_Configuration
, data
);
2907 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
2909 "Execute body, preserving window sizes and contents.\n\
2910 Restores which buffer appears in which window, where display starts,\n\
2911 as well as the current buffer.\n\
2912 Does not restore the value of point in current buffer.")
2916 register Lisp_Object val
;
2917 register int count
= specpdl_ptr
- specpdl
;
2919 record_unwind_protect (Fset_window_configuration
,
2920 Fcurrent_window_configuration (Qnil
));
2921 val
= Fprogn (args
);
2922 return unbind_to (count
, val
);
2928 selected_frame
= make_terminal_frame ();
2929 minibuf_window
= selected_frame
->minibuffer_window
;
2930 selected_window
= selected_frame
->selected_window
;
2931 last_nonminibuf_frame
= selected_frame
;
2932 #else /* not MULTI_FRAME */
2933 extern Lisp_Object
get_minibuffer ();
2935 minibuf_window
= make_window ();
2936 FRAME_ROOT_WINDOW (selected_frame
) = make_window ();
2938 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->next
= minibuf_window
;
2939 XWINDOW (minibuf_window
)->prev
= FRAME_ROOT_WINDOW (selected_frame
);
2940 XWINDOW (minibuf_window
)->mini_p
= Qt
;
2942 /* These values 9 and 10 are arbitrary,
2943 just so that there is "something there."
2944 Correct values are put in in init_xdisp */
2946 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->width
) = 10;
2947 XFASTINT (XWINDOW (minibuf_window
)->width
) = 10;
2949 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->height
) = 9;
2950 XFASTINT (XWINDOW (minibuf_window
)->top
) = 9;
2951 XFASTINT (XWINDOW (minibuf_window
)->height
) = 1;
2953 /* Prevent error in Fset_window_buffer. */
2954 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->buffer
= Qt
;
2955 XWINDOW (minibuf_window
)->buffer
= Qt
;
2957 /* Now set them up for real. */
2958 Fset_window_buffer (FRAME_ROOT_WINDOW (selected_frame
),
2959 Fcurrent_buffer ());
2960 Fset_window_buffer (minibuf_window
, get_minibuffer (0));
2962 selected_window
= FRAME_ROOT_WINDOW (selected_frame
);
2963 /* Make sure this window seems more recently used than
2964 a newly-created, never-selected window. Increment
2965 window_select_count so the first selection ever will get
2966 something newer than this. */
2967 XFASTINT (XWINDOW (selected_window
)->use_time
) = ++window_select_count
;
2968 #endif /* not MULTI_FRAME */
2973 Qwindowp
= intern ("windowp");
2974 staticpro (&Qwindowp
);
2976 Qwindow_live_p
= intern ("window-live-p");
2977 staticpro (&Qwindow_live_p
);
2980 /* Make sure all windows get marked */
2981 staticpro (&minibuf_window
);
2984 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
2985 "Non-nil means call as function to display a help buffer.\n\
2986 Used by `with-output-to-temp-buffer'.");
2987 Vtemp_buffer_show_function
= Qnil
;
2989 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
2990 "If non-nil, function to call to handle `display-buffer'.\n\
2991 It will receive two args, the buffer and a flag which if non-nil means\n\
2992 that the currently selected window is not acceptable.\n\
2993 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
2994 work using this function.");
2995 Vdisplay_buffer_function
= Qnil
;
2997 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
2998 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
2999 Vminibuf_scroll_window
= Qnil
;
3001 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
3002 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
3003 Vother_window_scroll_buffer
= Qnil
;
3005 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
3006 "*Non-nil means `display-buffer' should make a separate frame.");
3009 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
3010 "*If non-nil, function to call to handle automatic new frame creation.\n\
3011 It is called with no arguments and should return a newly created frame.\n\
3013 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
3014 where `pop-up-frame-alist' would hold the default frame parameters.");
3015 Vpop_up_frame_function
= Qnil
;
3017 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
3018 "*Non-nil means display-buffer should make new windows.");
3021 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
3022 "*Number of lines of continuity when scrolling by screenfuls.");
3023 next_screen_context_lines
= 2;
3025 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
3026 "*display-buffer would prefer to split the largest window if this large.\n\
3027 If there is only one window, it is split regardless of this value.");
3028 split_height_threshold
= 500;
3030 DEFVAR_INT ("window-min-height", &window_min_height
,
3031 "*Delete any window less than this tall (including its mode line).");
3032 window_min_height
= 4;
3034 DEFVAR_INT ("window-min-width", &window_min_width
,
3035 "*Delete any window less than this wide.");
3036 window_min_width
= 10;
3038 defsubr (&Sselected_window
);
3039 defsubr (&Sminibuffer_window
);
3040 defsubr (&Swindow_minibuffer_p
);
3041 defsubr (&Swindowp
);
3042 defsubr (&Swindow_live_p
);
3043 defsubr (&Spos_visible_in_window_p
);
3044 defsubr (&Swindow_buffer
);
3045 defsubr (&Swindow_height
);
3046 defsubr (&Swindow_width
);
3047 defsubr (&Swindow_hscroll
);
3048 defsubr (&Sset_window_hscroll
);
3049 defsubr (&Swindow_edges
);
3050 defsubr (&Scoordinates_in_window_p
);
3051 defsubr (&Swindow_at
);
3052 defsubr (&Swindow_point
);
3053 defsubr (&Swindow_start
);
3054 defsubr (&Swindow_end
);
3055 defsubr (&Sset_window_point
);
3056 defsubr (&Sset_window_start
);
3057 defsubr (&Swindow_dedicated_p
);
3058 defsubr (&Sset_window_dedicated_p
);
3059 defsubr (&Swindow_display_table
);
3060 defsubr (&Sset_window_display_table
);
3061 defsubr (&Snext_window
);
3062 defsubr (&Sprevious_window
);
3063 defsubr (&Sother_window
);
3064 defsubr (&Sget_lru_window
);
3065 defsubr (&Sget_largest_window
);
3066 defsubr (&Sget_buffer_window
);
3067 defsubr (&Sdelete_other_windows
);
3068 defsubr (&Sdelete_windows_on
);
3069 defsubr (&Sreplace_buffer_in_windows
);
3070 defsubr (&Sdelete_window
);
3071 defsubr (&Sset_window_buffer
);
3072 defsubr (&Sselect_window
);
3073 defsubr (&Sdisplay_buffer
);
3074 defsubr (&Ssplit_window
);
3075 defsubr (&Senlarge_window
);
3076 defsubr (&Sshrink_window
);
3077 defsubr (&Sscroll_up
);
3078 defsubr (&Sscroll_down
);
3079 defsubr (&Sscroll_left
);
3080 defsubr (&Sscroll_right
);
3081 defsubr (&Sscroll_other_window
);
3082 defsubr (&Srecenter
);
3083 defsubr (&Smove_to_window_line
);
3084 defsubr (&Swindow_configuration_p
);
3085 defsubr (&Sset_window_configuration
);
3086 defsubr (&Scurrent_window_configuration
);
3087 defsubr (&Ssave_window_excursion
);
3092 initial_define_key (control_x_map
, '1', "delete-other-windows");
3093 initial_define_key (control_x_map
, '2', "split-window");
3094 initial_define_key (control_x_map
, '0', "delete-window");
3095 initial_define_key (control_x_map
, 'o', "other-window");
3096 initial_define_key (control_x_map
, '^', "enlarge-window");
3097 initial_define_key (control_x_map
, '<', "scroll-left");
3098 initial_define_key (control_x_map
, '>', "scroll-right");
3100 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
3101 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
3102 initial_define_key (meta_map
, 'v', "scroll-down");
3104 initial_define_key (global_map
, Ctl('L'), "recenter");
3105 initial_define_key (meta_map
, 'r', "move-to-window-line");