1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985, 1986, 1987, 1993 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
;
193 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
197 w
= decode_window (window
);
198 top
= marker_position (w
->start
);
203 height
= XFASTINT (w
->height
) - ! MINI_WINDOW_P (w
);
205 buf
= XBUFFER (w
->buffer
);
206 if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
))
208 /* If frame is up to date,
209 use the info recorded about how much text fit on it. */
210 if (posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
)
211 || (XFASTINT (w
->window_end_vpos
) < height
))
217 if (posint
> BUF_Z (buf
))
220 /* If that info is not correct, calculate afresh */
221 posval
= *compute_motion (top
, 0, 0, posint
, height
, 0,
222 window_internal_width (w
) - 1,
223 XINT (w
->hscroll
), 0);
225 return posval
.vpos
< height
? Qt
: Qnil
;
229 static struct window
*
230 decode_window (window
)
231 register Lisp_Object window
;
234 return XWINDOW (selected_window
);
236 CHECK_LIVE_WINDOW (window
, 0);
237 return XWINDOW (window
);
240 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
241 "Return the buffer that WINDOW is displaying.")
245 return decode_window (window
)->buffer
;
248 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
249 "Return the number of lines in WINDOW (including its mode line).")
253 return decode_window (window
)->height
;
256 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
257 "Return the number of columns in WINDOW.")
261 register struct window
*w
= decode_window (window
);
262 register int width
= XFASTINT (w
->width
);
264 return make_number (window_internal_width (w
));
267 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
268 "Return the number of columns by which WINDOW is scrolled from left margin.")
272 return decode_window (window
)->hscroll
;
275 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
276 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
277 NCOL should be zero or positive.")
279 register Lisp_Object window
, ncol
;
281 register struct window
*w
;
283 CHECK_NUMBER (ncol
, 1);
284 if (XINT (ncol
) < 0) XFASTINT (ncol
) = 0;
285 if (XFASTINT (ncol
) >= (1 << (SHORTBITS
- 1)))
286 args_out_of_range (ncol
, Qnil
);
287 w
= decode_window (window
);
288 if (XINT (w
->hscroll
) != XINT (ncol
))
289 clip_changed
= 1; /* Prevent redisplay shortcuts */
294 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
295 "Return a list of the edge coordinates of WINDOW.\n\
296 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
297 RIGHT is one more than the rightmost column used by WINDOW,\n\
298 and BOTTOM is one more than the bottommost row used by WINDOW\n\
303 register struct window
*w
= decode_window (window
);
305 return Fcons (w
->left
, Fcons (w
->top
,
306 Fcons (make_number (XFASTINT (w
->left
) + XFASTINT (w
->width
)),
307 Fcons (make_number (XFASTINT (w
->top
)
308 + XFASTINT (w
->height
)),
312 /* Test if the character at column *x, row *y is within window *w.
313 If it is not, return 0;
314 if it is in the window's text area,
315 set *x and *y to its location relative to the upper left corner
318 if it is on the window's modeline, return 2;
319 if it is on the border between the window and its right sibling,
322 coordinates_in_window (w
, x
, y
)
323 register struct window
*w
;
326 register int left
= XINT (w
->left
);
327 register int width
= XINT (w
->width
);
328 register int window_height
= XINT (w
->height
);
329 register int top
= XFASTINT (w
->top
);
331 if ( *x
< left
|| *x
>= left
+ width
332 || *y
< top
|| *y
>= top
+ window_height
)
335 /* Is the character is the mode line? */
336 if (*y
== top
+ window_height
- 1
337 && ! MINI_WINDOW_P (w
))
340 /* Is the character in the right border? */
341 if (*x
== left
+ width
- 1
342 && left
+ width
!= FRAME_WIDTH (XFRAME (w
->frame
)))
350 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
351 Scoordinates_in_window_p
, 2, 2, 0,
352 "Return non-nil if COORDINATES are in WINDOW.\n\
353 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
354 measured in characters from the upper-left corner of the frame.\n\
355 (0 . 0) denotes the character in the upper left corner of the\n\
357 If COORDINATES are in the text portion of WINDOW,\n\
358 the coordinates relative to the window are returned.\n\
359 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
360 If they are on the border between WINDOW and its right sibling,\n\
361 `vertical-line' is returned.")
362 (coordinates
, window
)
363 register Lisp_Object coordinates
, window
;
367 CHECK_LIVE_WINDOW (window
, 0);
368 CHECK_CONS (coordinates
, 1);
369 x
= XINT (Fcar (coordinates
));
370 y
= XINT (Fcdr (coordinates
));
372 switch (coordinates_in_window (XWINDOW (window
), &x
, &y
))
374 case 0: /* NOT in window at all. */
377 case 1: /* In text part of window. */
380 case 2: /* In mode line of window. */
383 case 3: /* On right border of window. */
384 return Qvertical_line
;
391 /* Find the window containing column x, row y, and return it as a
392 Lisp_Object. If x, y is on the window's modeline, set *part
393 to 1; if it is on the separating line between the window and its
394 right sibling, set it to 2; otherwise set it to 0. If there is no
395 window under x, y return nil and leave *part unmodified. */
397 window_from_coordinates (frame
, x
, y
, part
)
402 register Lisp_Object tem
, first
;
404 tem
= first
= FRAME_SELECTED_WINDOW (frame
);
408 int found
= coordinates_in_window (XWINDOW (tem
), &x
, &y
);
416 tem
= Fnext_window (tem
, Qt
, Qlambda
);
418 while (! EQ (tem
, first
));
423 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
424 "Return window containing coordinates X and Y on FRAME.\n\
425 If omitted, FRAME defaults to the currently selected frame.\n\
426 The top left corner of the frame is considered to be row 0,\n\
429 Lisp_Object x
, y
, frame
;
435 XSET (frame
, Lisp_Frame
, selected_frame
);
437 CHECK_LIVE_FRAME (frame
, 2);
442 return window_from_coordinates (XFRAME (frame
),
447 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
448 "Return current value of point in WINDOW.\n\
449 For a nonselected window, this is the value point would have\n\
450 if that window were selected.\n\
452 Note that, when WINDOW is the selected window and its buffer\n\
453 is also currently selected, the value returned is the same as (point).\n\
454 It would be more strictly correct to return the `top-level' value\n\
455 of point, outside of any save-excursion forms.\n\
456 But that is hard to define.")
460 register struct window
*w
= decode_window (window
);
462 if (w
== XWINDOW (selected_window
)
463 && current_buffer
== XBUFFER (w
->buffer
))
465 return Fmarker_position (w
->pointm
);
468 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
469 "Return position at which display currently starts in WINDOW.")
473 return Fmarker_position (decode_window (window
)->start
);
476 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 1, 0,
477 "Return position at which display currently ends in WINDOW.")
482 struct window
*w
= decode_window (window
);
486 CHECK_BUFFER (buf
, 0);
488 XSET (value
, Lisp_Int
,
489 BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
494 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
495 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
497 Lisp_Object window
, pos
;
499 register struct window
*w
= decode_window (window
);
501 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
502 if (w
== XWINDOW (selected_window
))
505 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
510 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
511 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
512 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
513 from overriding motion of point in order to display at this exact start.")
514 (window
, pos
, noforce
)
515 Lisp_Object window
, pos
, noforce
;
517 register struct window
*w
= decode_window (window
);
519 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
520 set_marker_restricted (w
->start
, pos
, w
->buffer
);
521 /* this is not right, but much easier than doing what is right. */
522 w
->start_at_line_beg
= Qnil
;
525 w
->update_mode_line
= Qt
;
526 XFASTINT (w
->last_modified
) = 0;
527 if (!EQ (window
, selected_window
))
528 windows_or_buffers_changed
++;
532 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
534 "Return WINDOW's dedicated object, usually t or nil.\n\
535 See also `set-window-dedicated-p'.")
539 return decode_window (window
)->dedicated
;
542 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
543 Sset_window_dedicated_p
, 2, 2, 0,
544 "Control whether WINDOW is dedicated to the buffer it displays.\n\
545 If it is dedicated, Emacs will not automatically change\n\
546 which buffer appears in it.\n\
547 The second argument is the new value for the dedication flag;\n\
550 Lisp_Object window
, arg
;
552 register struct window
*w
= decode_window (window
);
562 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
564 "Return the display-table that WINDOW is using.")
568 return decode_window (window
)->display_table
;
571 /* Get the display table for use currently on window W.
572 This is either W's display table or W's buffer's display table.
573 Ignore the specified tables if they are not valid;
574 if no valid table is specified, return 0. */
577 window_display_table (w
)
581 tem
= w
->display_table
;
582 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
583 return XVECTOR (tem
);
584 tem
= XBUFFER (w
->buffer
)->display_table
;
585 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
586 return XVECTOR (tem
);
587 tem
= Vstandard_display_table
;
588 if (XTYPE (tem
) == Lisp_Vector
&& XVECTOR (tem
)->size
== DISP_TABLE_SIZE
)
589 return XVECTOR (tem
);
593 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
594 "Set WINDOW's display-table to TABLE.")
596 register Lisp_Object window
, table
;
598 register struct window
*w
;
599 register Lisp_Object z
; /* Return value. */
601 w
= decode_window (window
);
602 w
->display_table
= table
;
606 /* Record info on buffer window w is displaying
607 when it is about to cease to display that buffer. */
610 register struct window
*w
;
612 Lisp_Object buf
= w
->buffer
;
614 if (XBUFFER (buf
) != XMARKER (w
->pointm
)->buffer
)
617 if (w
== XWINDOW (selected_window
)
618 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
619 /* Do this except when the selected window's buffer
620 is being removed from some other window. */
621 XBUFFER (buf
)->last_window_start
= marker_position (w
->start
);
623 /* Point in the selected window's buffer
624 is actually stored in that buffer, and the window's pointm isn't used.
625 So don't clobber point in that buffer. */
626 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
))
627 BUF_PT (XBUFFER (buf
))
628 = clip_to_bounds (BUF_BEGV (XBUFFER (buf
)),
629 marker_position (w
->pointm
),
630 BUF_ZV (XBUFFER (buf
)));
633 /* Put replacement into the window structure in place of old. */
635 replace_window (old
, replacement
)
636 Lisp_Object old
, replacement
;
638 register Lisp_Object tem
;
639 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
641 /* If OLD is its frame's root_window, then replacement is the new
642 root_window for that frame. */
644 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
645 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
650 p
->height
= o
->height
;
652 p
->next
= tem
= o
->next
;
654 XWINDOW (tem
)->prev
= replacement
;
656 p
->prev
= tem
= o
->prev
;
658 XWINDOW (tem
)->next
= replacement
;
660 p
->parent
= tem
= o
->parent
;
663 if (EQ (XWINDOW (tem
)->vchild
, old
))
664 XWINDOW (tem
)->vchild
= replacement
;
665 if (EQ (XWINDOW (tem
)->hchild
, old
))
666 XWINDOW (tem
)->hchild
= replacement
;
669 /*** Here, if replacement is a vertical combination
670 and so is its new parent, we should make replacement's
671 children be children of that parent instead. ***/
674 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
675 "Remove WINDOW from the display. Default is selected window.")
677 register Lisp_Object window
;
679 register Lisp_Object tem
, parent
, sib
;
680 register struct window
*p
;
681 register struct window
*par
;
683 /* Because this function is called by other C code on non-leaf
684 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
685 so we can't decode_window here. */
687 window
= selected_window
;
689 CHECK_WINDOW (window
, 0);
690 p
= XWINDOW (window
);
692 /* It's okay to delete an already-deleted window. */
700 error ("Attempt to delete minibuffer or sole ordinary window");
701 par
= XWINDOW (parent
);
703 windows_or_buffers_changed
++;
705 /* Are we trying to delete any frame's selected window? */
707 Lisp_Object frame
, pwindow
;
709 /* See if the frame's selected window is either WINDOW
710 or any subwindow of it, by finding all that window's parents
711 and comparing each one with WINDOW. */
712 frame
= WINDOW_FRAME (XWINDOW (window
));
713 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
715 while (!NILP (pwindow
))
717 if (EQ (window
, pwindow
))
719 pwindow
= XWINDOW (pwindow
)->parent
;
722 if (EQ (window
, pwindow
))
724 Lisp_Object alternative
= Fnext_window (window
, Qlambda
, Qnil
);
726 /* If we're about to delete the selected window on the
727 selected frame, then we should use Fselect_window to select
728 the new window. On the other hand, if we're about to
729 delete the selected window on any other frame, we shouldn't do
730 anything but set the frame's selected_window slot. */
731 if (EQ (window
, selected_window
))
732 Fselect_window (alternative
);
734 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
739 /* tem is null for dummy parent windows
740 (which have inferiors but not any contents themselves) */
744 unchain_marker (p
->pointm
);
745 unchain_marker (p
->start
);
750 XWINDOW (tem
)->prev
= p
->prev
;
754 XWINDOW (tem
)->next
= p
->next
;
756 if (EQ (window
, par
->hchild
))
757 par
->hchild
= p
->next
;
758 if (EQ (window
, par
->vchild
))
759 par
->vchild
= p
->next
;
761 /* Find one of our siblings to give our space to. */
765 /* If p gives its space to its next sibling, that sibling needs
766 to have its top/left side pulled back to where p's is.
767 set_window_{height,width} will re-position the sibling's
770 XWINDOW (sib
)->top
= p
->top
;
771 XWINDOW (sib
)->left
= p
->left
;
774 /* Stretch that sibling. */
775 if (!NILP (par
->vchild
))
776 set_window_height (sib
,
777 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
779 if (!NILP (par
->hchild
))
780 set_window_width (sib
,
781 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
784 /* If parent now has only one child,
785 put the child into the parent's place. */
789 if (NILP (XWINDOW (tem
)->next
))
790 replace_window (parent
, tem
);
792 /* Since we may be deleting combination windows, we must make sure that
793 not only p but all its children have been marked as deleted. */
794 if (! NILP (p
->hchild
))
795 delete_all_subwindows (XWINDOW (p
->hchild
));
796 else if (! NILP (p
->vchild
))
797 delete_all_subwindows (XWINDOW (p
->vchild
));
799 /* Mark this window as deleted. */
800 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
806 extern Lisp_Object
next_frame (), prev_frame ();
808 /* This comment supplies the doc string for `next-window',
809 for make-docfile to see. We cannot put this in the real DEFUN
810 due to limits in the Unix cpp.
812 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
813 "Return next window after WINDOW in canonical ordering of windows.\n\
814 If omitted, WINDOW defaults to the selected window.\n\
816 Optional second arg MINIBUF t means count the minibuffer window even\n\
817 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
818 it is active. MINIBUF neither t nor nil means not to count the\n\
819 minibuffer even if it is active.\n\
821 Several frames may share a single minibuffer; if the minibuffer\n\
822 counts, all windows on all frames that share that minibuffer count\n\
823 too. This means that next-window may be used to iterate through the\n\
824 set of windows even when the minibuffer is on another frame. If the\n\
825 minibuffer does not count, only windows from WINDOW's frame count.\n\
827 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
828 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
829 above. If neither nil nor t, restrict to WINDOW's frame.\n\
831 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
832 `next-window' to iterate through the entire cycle of acceptable\n\
833 windows, eventually ending up back at the window you started with.\n\
834 `previous-window' traverses the same cycle, in the reverse order.")
835 (window, minibuf, all_frames) */
837 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
839 (window
, minibuf
, all_frames
)
840 register Lisp_Object window
, minibuf
, all_frames
;
842 register Lisp_Object tem
;
843 Lisp_Object start_window
;
846 window
= selected_window
;
848 CHECK_LIVE_WINDOW (window
, 0);
850 start_window
= window
;
852 /* minibuf == nil may or may not include minibuffers.
853 Decide if it does. */
855 minibuf
= (minibuf_level
? Qt
: Qlambda
);
857 /* all_frames == nil doesn't specify which frames to include.
858 Decide which frames it includes. */
859 if (NILP (all_frames
))
860 all_frames
= (EQ (minibuf
, Qt
)
861 ? (FRAME_MINIBUF_WINDOW
864 (XWINDOW (window
)))))
866 else if (! EQ (all_frames
, Qt
))
868 /* Now all_frames is t meaning search all frames,
869 nil meaning search just current frame,
870 or a window, meaning search the frame that window belongs to. */
872 /* Do this loop at least once, to get the next window, and perhaps
873 again, if we hit the minibuffer and that is not acceptable. */
876 /* Find a window that actually has a next one. This loop
877 climbs up the tree. */
878 while (tem
= XWINDOW (window
)->next
, NILP (tem
))
879 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
883 /* We've reached the end of this frame.
884 Which other frames are acceptable? */
885 tem
= WINDOW_FRAME (XWINDOW (window
));
887 if (! NILP (all_frames
))
888 tem
= next_frame (tem
, all_frames
);
890 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
897 /* If we're in a combination window, find its first child and
898 recurse on that. Otherwise, we've found the window we want. */
901 if (!NILP (XWINDOW (window
)->hchild
))
902 window
= XWINDOW (window
)->hchild
;
903 else if (!NILP (XWINDOW (window
)->vchild
))
904 window
= XWINDOW (window
)->vchild
;
908 /* Which windows are acceptible?
909 Exit the loop and accept this window if
910 this isn't a minibuffer window, or
911 we're accepting minibuffer windows, or
912 we've come all the way around and we're back at the original window. */
913 while (MINI_WINDOW_P (XWINDOW (window
))
914 && ! EQ (minibuf
, Qt
)
915 && ! EQ (window
, start_window
));
920 /* This comment supplies the doc string for `previous-window',
921 for make-docfile to see. We cannot put this in the real DEFUN
922 due to limits in the Unix cpp.
924 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
925 "Return the window preceeding WINDOW in canonical ordering of windows.\n\
926 If omitted, WINDOW defaults to the selected window.\n\
928 Optional second arg MINIBUF t means count the minibuffer window even\n\
929 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
930 it is active. MINIBUF neither t nor nil means not to count the\n\
931 minibuffer even if it is active.\n\
933 Several frames may share a single minibuffer; if the minibuffer\n\
934 counts, all windows on all frames that share that minibuffer count\n\
935 too. This means that previous-window may be used to iterate through\n\
936 the set of windows even when the minibuffer is on another frame. If\n\
937 the minibuffer does not count, only windows from WINDOW's frame\n\
940 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
941 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
942 above. If neither nil nor t, restrict to WINDOW's frame.\n\
944 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
945 `previous-window' to iterate through the entire cycle of acceptable\n\
946 windows, eventually ending up back at the window you started with.\n\
947 `next-window' traverses the same cycle, in the reverse order.")
948 (window, minibuf, all_frames) */
951 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
953 (window
, minibuf
, all_frames
)
954 register Lisp_Object window
, minibuf
, all_frames
;
956 register Lisp_Object tem
;
957 Lisp_Object start_window
;
960 window
= selected_window
;
962 CHECK_LIVE_WINDOW (window
, 0);
964 start_window
= window
;
966 /* minibuf == nil may or may not include minibuffers.
967 Decide if it does. */
969 minibuf
= (minibuf_level
? Qt
: Qlambda
);
971 /* all_frames == nil doesn't specify which frames to include.
972 Decide which frames it includes. */
973 if (NILP (all_frames
))
974 all_frames
= (EQ (minibuf
, Qt
)
975 ? (FRAME_MINIBUF_WINDOW
978 (XWINDOW (window
)))))
980 else if (! EQ (all_frames
, Qt
))
982 /* Now all_frames is t meaning search all frames,
983 nil meaning search just current frame,
984 or a window, meaning search the frame that window belongs to. */
986 /* Do this loop at least once, to get the previous window, and perhaps
987 again, if we hit the minibuffer and that is not acceptable. */
990 /* Find a window that actually has a previous one. This loop
991 climbs up the tree. */
992 while (tem
= XWINDOW (window
)->prev
, NILP (tem
))
993 if (tem
= XWINDOW (window
)->parent
, !NILP (tem
))
997 /* We have found the top window on the frame.
998 Which frames are acceptable? */
999 tem
= WINDOW_FRAME (XWINDOW (window
));
1001 if (! NILP (all_frames
))
1002 /* It's actually important that we use prev_frame here,
1003 rather than next_frame. All the windows acceptable
1004 according to the given parameters should form a ring;
1005 Fnext_window and Fprevious_window should go back and
1006 forth around the ring. If we use next_frame here,
1007 then Fnext_window and Fprevious_window take different
1008 paths through the set of acceptable windows.
1009 window_loop assumes that these `ring' requirement are
1011 tem
= prev_frame (tem
, all_frames
);
1013 /* If this frame has a minibuffer, find that window first,
1014 because it is conceptually the last window in that frame. */
1015 if (FRAME_HAS_MINIBUF_P (XFRAME (tem
)))
1016 tem
= FRAME_MINIBUF_WINDOW (XFRAME (tem
));
1018 tem
= FRAME_ROOT_WINDOW (XFRAME (tem
));
1024 /* If we're in a combination window, find its last child and
1025 recurse on that. Otherwise, we've found the window we want. */
1028 if (!NILP (XWINDOW (window
)->hchild
))
1029 window
= XWINDOW (window
)->hchild
;
1030 else if (!NILP (XWINDOW (window
)->vchild
))
1031 window
= XWINDOW (window
)->vchild
;
1033 while (tem
= XWINDOW (window
)->next
, !NILP (tem
))
1037 /* Which windows are acceptable?
1038 Exit the loop and accept this window if
1039 this isn't a minibuffer window, or
1040 we're accepting minibuffer windows, or
1041 we've come all the way around and we're back at the original window. */
1042 while (MINI_WINDOW_P (XWINDOW (window
))
1043 && !EQ (minibuf
, Qt
)
1044 && !EQ (window
, start_window
));
1049 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1050 "Select the ARG'th different window on this frame.\n\
1051 All windows on current frame are arranged in a cyclic order.\n\
1052 This command selects the window ARG steps away in that order.\n\
1053 A negative ARG moves in the opposite order. If the optional second\n\
1054 argument ALL_FRAMES is non-nil, cycle through all frames.")
1056 register Lisp_Object n
, all_frames
;
1059 register Lisp_Object w
;
1061 CHECK_NUMBER (n
, 0);
1062 w
= selected_window
;
1067 w
= Fnext_window (w
, Qnil
, all_frames
);
1072 w
= Fprevious_window (w
, Qnil
, all_frames
);
1079 /* Look at all windows, performing an operation specified by TYPE
1081 If FRAMES is Qt, look at all frames;
1082 Qnil, look at just the selected frame;
1083 a frame, just look at windows on that frame.
1084 If MINI is non-zero, perform the operation on minibuffer windows too.
1090 GET_BUFFER_WINDOW
, /* Arg is buffer */
1091 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1092 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1093 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1095 UNSHOW_BUFFER
, /* Arg is buffer */
1099 window_loop (type
, obj
, mini
, frames
)
1100 enum window_loop type
;
1101 register Lisp_Object obj
, frames
;
1104 register Lisp_Object w
;
1105 register Lisp_Object best_window
;
1106 register Lisp_Object next_window
;
1107 register Lisp_Object last_window
;
1111 /* If we're only looping through windows on a particular frame,
1112 frame points to that frame. If we're looping through windows
1113 on all frames, frame is 0. */
1114 if (FRAMEP (frames
))
1115 frame
= XFRAME (frames
);
1116 else if (NILP (frames
))
1117 frame
= selected_frame
;
1124 /* Pick a window to start with. */
1125 if (XTYPE (obj
) == Lisp_Window
)
1128 w
= FRAME_SELECTED_WINDOW (frame
);
1130 w
= FRAME_SELECTED_WINDOW (selected_frame
);
1132 /* Figure out the last window we're going to mess with. Since
1133 Fnext_window, given the same options, is guaranteed to go in a
1134 ring, we can just use Fprevious_window to find the last one.
1136 We can't just wait until we hit the first window again, because
1137 it might be deleted. */
1141 last_window
= Fprevious_window (w
, (mini
? Qt
: Qnil
), Qlambda
);
1143 #endif /* MULTI_FRAME */
1144 /* We know frame is 0, so we're looping through all frames.
1145 Or we know this isn't a MULTI_FRAME Emacs, so who cares? */
1146 last_window
= Fprevious_window (w
, mini
? Qt
: Qnil
, Qt
);
1151 FRAME_PTR w_frame
= XFRAME (WINDOW_FRAME (XWINDOW (w
)));
1153 /* Pick the next window now, since some operations will delete
1154 the current window. */
1157 next_window
= Fnext_window (w
, (mini
? Qt
: Qnil
), Qlambda
);
1159 #endif /* MULTI_FRAME */
1160 /* We know frame is 0, so we're looping through all frames.
1161 Or we know this isn't a MULTI_FRAME Emacs, so who cares? */
1162 next_window
= Fnext_window (w
, mini
? Qt
: Qnil
, Qt
);
1164 if (! MINI_WINDOW_P (XWINDOW (w
))
1165 || (mini
&& minibuf_level
> 0))
1168 case GET_BUFFER_WINDOW
:
1169 /* Ignore invisible and iconified frames. */
1170 if (! FRAME_VISIBLE_P (w_frame
)
1171 || FRAME_ICONIFIED_P (w_frame
))
1173 if (XBUFFER (XWINDOW (w
)->buffer
) == XBUFFER (obj
))
1177 case GET_LRU_WINDOW
:
1178 /* t as arg means consider only full-width windows */
1179 if (!NILP (obj
) && XFASTINT (XWINDOW (w
)->width
)
1180 != FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (w
)))))
1183 /* Ignore invisible and iconified frames. */
1184 if (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (w
))))
1185 || FRAME_ICONIFIED_P (XFRAME (WINDOW_FRAME (XWINDOW (w
)))))
1188 /* Ignore dedicated windows and minibuffers. */
1189 if (MINI_WINDOW_P (XWINDOW (w
))
1190 || !NILP (XWINDOW (w
)->dedicated
))
1192 if (NILP (best_window
)
1193 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1194 > XFASTINT (XWINDOW (w
)->use_time
)))
1198 case DELETE_OTHER_WINDOWS
:
1199 if (XWINDOW (w
) != XWINDOW (obj
))
1203 case DELETE_BUFFER_WINDOWS
:
1204 if (EQ (XWINDOW (w
)->buffer
, obj
))
1206 /* If we're deleting the buffer displayed in the only window
1207 on the frame, find a new buffer to display there. */
1208 if (NILP (XWINDOW (w
)->parent
))
1210 Lisp_Object new_buffer
= Fother_buffer (obj
, Qnil
);
1211 if (NILP (new_buffer
))
1213 = Fget_buffer_create (build_string ("*scratch*"));
1214 Fset_window_buffer (w
, new_buffer
);
1215 Fset_buffer (XWINDOW (w
)->buffer
);
1222 case GET_LARGEST_WINDOW
:
1224 /* Ignore invisible and iconified frames. */
1225 if (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (w
))))
1226 || FRAME_ICONIFIED_P (XFRAME (WINDOW_FRAME (XWINDOW (w
)))))
1229 /* Ignore dedicated windows and minibuffers. */
1230 if (MINI_WINDOW_P (XWINDOW (w
))
1231 || !NILP (XWINDOW (w
)->dedicated
))
1234 struct window
*best_window_ptr
= XWINDOW (best_window
);
1235 struct window
*w_ptr
= XWINDOW (w
);
1236 if (NILP (best_window
) ||
1237 (XFASTINT (w_ptr
->height
) * XFASTINT (w_ptr
->width
))
1238 > (XFASTINT (best_window_ptr
->height
)
1239 * XFASTINT (best_window_ptr
->width
)))
1245 if (EQ (XWINDOW (w
)->buffer
, obj
))
1247 /* Find another buffer to show in this window. */
1248 Lisp_Object another_buffer
= Fother_buffer (obj
, Qnil
);
1249 if (NILP (another_buffer
))
1251 = Fget_buffer_create (build_string ("*scratch*"));
1252 Fset_window_buffer (w
, another_buffer
);
1253 if (EQ (w
, selected_window
))
1254 Fset_buffer (XWINDOW (w
)->buffer
);
1259 if (EQ (w
, last_window
))
1268 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1269 "Return the window least recently selected or used for display.\n\
1270 If optional argument FRAMES is t, search all frames. If FRAME is a\n\
1271 frame, search only that frame.\n")
1275 register Lisp_Object w
;
1276 /* First try for a window that is full-width */
1277 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frames
);
1278 if (!NILP (w
) && !EQ (w
, selected_window
))
1280 /* If none of them, try the rest */
1281 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frames
);
1284 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1285 "Return the largest window in area.\n\
1286 If optional argument FRAMES is t, search all frames. If FRAME is a\n\
1287 frame, search only that frame.\n")
1291 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1295 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1296 "Return a window currently displaying BUFFER, or nil if none.\n\
1297 If optional argument FRAME is t, search all visible frames.\n\
1298 If FRAME is nil, search only the selected frame.\n\
1299 If FRAME is a frame, search only that frame.\n")
1301 Lisp_Object buffer
, frame
;
1303 buffer
= Fget_buffer (buffer
);
1304 if (XTYPE (buffer
) == Lisp_Buffer
)
1305 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1310 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1312 "Make WINDOW (or the selected window) fill its frame.\n\
1313 Only the frame WINDOW is on is affected.")
1319 struct buffer
*obuf
= current_buffer
;
1323 window
= selected_window
;
1325 CHECK_LIVE_WINDOW (window
, 0);
1327 w
= XWINDOW (window
);
1328 top
= XFASTINT (w
->top
);
1330 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1332 Fset_buffer (w
->buffer
);
1333 SET_PT (marker_position (w
->start
));
1334 Frecenter (make_number (top
- FRAME_MENU_BAR_LINES (XFRAME (WINDOW_FRAME (w
)))));
1336 set_buffer_internal (obuf
);
1341 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
1342 1, 1, "bDelete windows on (buffer): ",
1343 "Delete all windows showing BUFFER.\n\
1344 Optional second argument FRAME controls which frames are affected.\n\
1345 If nil or omitted, delete all windows showing BUFFER in any frame.\n\
1346 If t, delete only windows showing BUFFER in the selected frame.\n\
1347 If a frame, delete only windows showing BUFFER in that frame.")
1349 Lisp_Object buffer
, frame
;
1352 /* FRAME uses t and nil to mean the opposite of what window_loop
1354 if (! FRAMEP (frame
))
1355 frame
= NILP (frame
) ? Qt
: Qnil
;
1362 buffer
= Fget_buffer (buffer
);
1363 CHECK_BUFFER (buffer
, 0);
1364 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
1369 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
1370 Sreplace_buffer_in_windows
,
1371 1, 1, "bReplace buffer in windows: ",
1372 "Replace BUFFER with some other buffer in all windows showing it.")
1378 buffer
= Fget_buffer (buffer
);
1379 CHECK_BUFFER (buffer
, 0);
1380 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
1385 /* Set the height of WINDOW and all its inferiors. */
1387 /* The smallest acceptable dimensions for a window. Anything smaller
1388 might crash Emacs. */
1389 #define MIN_SAFE_WINDOW_WIDTH (2)
1390 #define MIN_SAFE_WINDOW_HEIGHT (2)
1392 /* Make sure that window_min_height and window_min_width are
1393 not too small; if they are, set them to safe minima. */
1396 check_min_window_sizes ()
1398 /* Smaller values might permit a crash. */
1399 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
1400 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
1401 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
1402 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
1405 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
1406 minimum allowable size. */
1408 check_frame_size (frame
, rows
, cols
)
1412 /* For height, we have to see whether the frame has a minibuffer, and
1413 whether it wants a mode line. */
1415 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
1416 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
1417 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
1419 if (*rows
< min_height
)
1421 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
1422 *cols
= MIN_SAFE_WINDOW_WIDTH
;
1425 /* Normally the window is deleted if it gets too small.
1426 nodelete nonzero means do not do this.
1427 (The caller should check later and do so if appropriate) */
1429 set_window_height (window
, height
, nodelete
)
1434 register struct window
*w
= XWINDOW (window
);
1435 register struct window
*c
;
1436 int oheight
= XFASTINT (w
->height
);
1437 int top
, pos
, lastbot
, opos
, lastobot
;
1440 check_min_window_sizes ();
1443 && ! NILP (w
->parent
)
1444 && height
< window_min_height
)
1446 Fdelete_window (window
);
1450 XFASTINT (w
->last_modified
) = 0;
1451 windows_or_buffers_changed
++;
1452 XFASTINT (w
->height
) = height
;
1453 if (!NILP (w
->hchild
))
1455 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1457 XWINDOW (child
)->top
= w
->top
;
1458 set_window_height (child
, height
, nodelete
);
1461 else if (!NILP (w
->vchild
))
1463 lastbot
= top
= XFASTINT (w
->top
);
1465 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
1467 c
= XWINDOW (child
);
1469 opos
= lastobot
+ XFASTINT (c
->height
);
1471 XFASTINT (c
->top
) = lastbot
;
1473 pos
= (((opos
* height
) << 1) + oheight
) / (oheight
<< 1);
1475 /* Avoid confusion: inhibit deletion of child if becomes too small */
1476 set_window_height (child
, pos
+ top
- lastbot
, 1);
1478 /* Now advance child to next window,
1479 and set lastbot if child was not just deleted. */
1480 lastbot
= pos
+ top
;
1483 /* Now delete any children that became too small. */
1485 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1487 set_window_height (child
, XINT (XWINDOW (child
)->height
), 0);
1492 /* Recursively set width of WINDOW and its inferiors. */
1494 set_window_width (window
, width
, nodelete
)
1499 register struct window
*w
= XWINDOW (window
);
1500 register struct window
*c
;
1501 int owidth
= XFASTINT (w
->width
);
1502 int left
, pos
, lastright
, opos
, lastoright
;
1505 if (!nodelete
&& width
< window_min_width
)
1507 Fdelete_window (window
);
1511 XFASTINT (w
->last_modified
) = 0;
1512 windows_or_buffers_changed
++;
1513 XFASTINT (w
->width
) = width
;
1514 if (!NILP (w
->vchild
))
1516 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1518 XWINDOW (child
)->left
= w
->left
;
1519 set_window_width (child
, width
, nodelete
);
1522 else if (!NILP (w
->hchild
))
1524 lastright
= left
= XFASTINT (w
->left
);
1526 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
1528 c
= XWINDOW (child
);
1530 opos
= lastoright
+ XFASTINT (c
->width
);
1532 XFASTINT (c
->left
) = lastright
;
1534 pos
= (((opos
* width
) << 1) + owidth
) / (owidth
<< 1);
1536 /* Inhibit deletion for becoming too small */
1537 set_window_width (child
, pos
+ left
- lastright
, 1);
1539 /* Now advance child to next window,
1540 and set lastright if child was not just deleted. */
1541 lastright
= pos
+ left
, lastoright
= opos
;
1543 /* Delete children that became too small */
1545 for (child
= w
->hchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
1547 set_window_width (child
, XINT (XWINDOW (child
)->width
), 0);
1552 int window_select_count
;
1554 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
1555 "Make WINDOW display BUFFER as its contents.\n\
1556 BUFFER can be a buffer or buffer name.")
1558 register Lisp_Object window
, buffer
;
1560 register Lisp_Object tem
;
1561 register struct window
*w
= decode_window (window
);
1563 buffer
= Fget_buffer (buffer
);
1564 CHECK_BUFFER (buffer
, 1);
1566 if (NILP (XBUFFER (buffer
)->name
))
1567 error ("Attempt to display deleted buffer");
1571 error ("Window is deleted");
1572 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
1573 is first being set up. */
1575 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
1576 error ("Window is dedicated to %s\n", tem
);
1582 w
->window_end_pos
= 0;
1583 w
->window_end_valid
= Qnil
;
1585 Fset_marker (w
->pointm
,
1586 make_number (BUF_PT (XBUFFER (buffer
))),
1588 set_marker_restricted (w
->start
,
1589 make_number (XBUFFER (buffer
)->last_window_start
),
1591 w
->start_at_line_beg
= Qnil
;
1592 w
->force_start
= Qnil
;
1593 XFASTINT (w
->last_modified
) = 0;
1594 windows_or_buffers_changed
++;
1595 if (EQ (window
, selected_window
))
1596 Fset_buffer (buffer
);
1601 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
1602 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
1603 The main editor command loop selects the buffer of the selected window\n\
1604 before each command.")
1606 register Lisp_Object window
;
1608 register struct window
*w
;
1609 register struct window
*ow
= XWINDOW (selected_window
);
1611 CHECK_LIVE_WINDOW (window
, 0);
1613 w
= XWINDOW (window
);
1615 if (NILP (w
->buffer
))
1616 error ("Trying to select deleted window or non-leaf window");
1618 XFASTINT (w
->use_time
) = ++window_select_count
;
1619 if (EQ (window
, selected_window
))
1622 Fset_marker (ow
->pointm
, make_number (BUF_PT (XBUFFER (ow
->buffer
))),
1625 selected_window
= window
;
1627 if (XFRAME (WINDOW_FRAME (w
)) != selected_frame
)
1629 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
1630 Fhandle_switch_frame (WINDOW_FRAME (w
), Qnil
);
1633 selected_frame
->selected_window
= window
;
1636 record_buffer (w
->buffer
);
1637 Fset_buffer (w
->buffer
);
1639 /* Go to the point recorded in the window.
1640 This is important when the buffer is in more
1641 than one window. It also matters when
1642 redisplay_window has altered point after scrolling,
1643 because it makes the change only in the window. */
1645 register int new_point
= marker_position (w
->pointm
);
1646 if (new_point
< BEGV
)
1654 windows_or_buffers_changed
++;
1658 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 2,
1659 "BDisplay buffer: \nP",
1660 "Make BUFFER appear in some window but don't select it.\n\
1661 BUFFER can be a buffer or a buffer name.\n\
1662 If BUFFER is shown already in some window, just use that one,\n\
1663 unless the window is the selected window and the optional second\n\
1664 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
1665 Returns the window displaying BUFFER.")
1666 (buffer
, not_this_window
)
1667 register Lisp_Object buffer
, not_this_window
;
1669 register Lisp_Object window
;
1671 buffer
= Fget_buffer (buffer
);
1672 CHECK_BUFFER (buffer
, 0);
1674 if (!NILP (Vdisplay_buffer_function
))
1675 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
1677 if (NILP (not_this_window
)
1678 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
1679 return selected_window
;
1681 window
= Fget_buffer_window (buffer
, Qnil
);
1683 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
1687 /* If there are no frames open that have more than a minibuffer,
1688 we need to create a new frame. */
1689 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
1692 = Fframe_selected_window (call0 (Vpop_up_frame_function
));
1693 Fset_window_buffer (window
, buffer
);
1695 Fhandle_switch_frame (XWINDOW (window
)->frame
, Qnil
);
1699 #endif /* MULTI_FRAME */
1703 || FRAME_MINIBUF_ONLY_P (selected_frame
)
1707 Lisp_Object frames
= Qnil
;
1710 if (FRAME_MINIBUF_ONLY_P (selected_frame
))
1711 XSET (frames
, Lisp_Frame
, last_nonminibuf_frame
);
1713 /* Don't try to create a window if would get an error */
1714 if (split_height_threshold
< window_min_height
<< 1)
1715 split_height_threshold
= window_min_height
<< 1;
1717 window
= Fget_largest_window (frames
);
1720 && window_height (window
) >= split_height_threshold
1721 && (XFASTINT (XWINDOW (window
)->width
)
1722 == FRAME_WIDTH (XFRAME (WINDOW_FRAME (XWINDOW (window
))))))
1723 window
= Fsplit_window (window
, Qnil
, Qnil
);
1726 window
= Fget_lru_window (frames
);
1727 if ((EQ (window
, selected_window
)
1728 || EQ (XWINDOW (window
)->parent
, Qnil
))
1729 && window_height (window
) >= window_min_height
<< 1)
1730 window
= Fsplit_window (window
, Qnil
, Qnil
);
1734 window
= Fget_lru_window (Qnil
);
1736 Fset_window_buffer (window
, buffer
);
1741 temp_output_buffer_show (buf
)
1742 register Lisp_Object buf
;
1744 register struct buffer
*old
= current_buffer
;
1745 register Lisp_Object window
;
1746 register struct window
*w
;
1749 XBUFFER (buf
)->save_modified
= MODIFF
;
1754 set_buffer_internal (old
);
1756 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
1757 call1 (Vtemp_buffer_show_function
, buf
);
1760 window
= Fdisplay_buffer (buf
, Qnil
);
1763 if (XFRAME (XWINDOW (window
)->frame
) != selected_frame
)
1764 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
1765 #endif /* MULTI_FRAME */
1766 Vminibuf_scroll_window
= window
;
1767 w
= XWINDOW (window
);
1768 XFASTINT (w
->hscroll
) = 0;
1769 set_marker_restricted (w
->start
, make_number (1), buf
);
1770 set_marker_restricted (w
->pointm
, make_number (1), buf
);
1775 make_dummy_parent (window
)
1778 register Lisp_Object old
, new;
1779 register struct window
*o
, *p
;
1782 XSETTYPE (old
, Lisp_Vector
);
1783 new = Fcopy_sequence (old
);
1784 XSETTYPE (new, Lisp_Window
);
1788 XFASTINT (p
->sequence_number
) = ++sequence_number
;
1790 /* Put new into window structure in place of window */
1791 replace_window (window
, new);
1804 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
1805 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
1806 WINDOW defaults to selected one and SIZE to half its size.\n\
1807 If optional third arg HOR-FLAG is non-nil, split side by side\n\
1808 and put SIZE columns in the first of the pair.")
1809 (window
, chsize
, horflag
)
1810 Lisp_Object window
, chsize
, horflag
;
1812 register Lisp_Object
new;
1813 register struct window
*o
, *p
;
1817 window
= selected_window
;
1819 CHECK_LIVE_WINDOW (window
, 0);
1821 o
= XWINDOW (window
);
1825 if (!NILP (horflag
))
1826 /* Round odd size up, since this is for the left-hand window,
1827 and it will lose a column for the separators. */
1828 size
= ((XFASTINT (o
->width
) + 1) & -2) >> 1;
1830 size
= XFASTINT (o
->height
) >> 1;
1834 CHECK_NUMBER (chsize
, 1);
1835 size
= XINT (chsize
);
1838 if (MINI_WINDOW_P (o
))
1839 error ("Attempt to split minibuffer window");
1840 else if (FRAME_NO_SPLIT_P (XFRAME (WINDOW_FRAME (o
))))
1841 error ("Attempt to split unsplittable frame");
1843 check_min_window_sizes ();
1847 if (size
< window_min_height
1848 || size
+ window_min_height
> XFASTINT (o
->height
))
1849 args_out_of_range_3 (window
, chsize
, horflag
);
1850 if (NILP (o
->parent
)
1851 || NILP (XWINDOW (o
->parent
)->vchild
))
1853 make_dummy_parent (window
);
1855 XWINDOW (new)->vchild
= window
;
1860 if (size
< window_min_width
1861 || size
+ window_min_width
> XFASTINT (o
->width
))
1862 args_out_of_range_3 (window
, chsize
, horflag
);
1863 if (NILP (o
->parent
)
1864 || NILP (XWINDOW (o
->parent
)->hchild
))
1866 make_dummy_parent (window
);
1868 XWINDOW (new)->hchild
= window
;
1872 /* Now we know that window's parent is a vertical combination
1873 if we are dividing vertically, or a horizontal combination
1874 if we are making side-by-side windows */
1876 windows_or_buffers_changed
++;
1877 new = make_window ();
1880 p
->frame
= o
->frame
;
1882 if (!NILP (p
->next
))
1883 XWINDOW (p
->next
)->prev
= new;
1886 p
->parent
= o
->parent
;
1889 Fset_window_buffer (new, o
->buffer
);
1891 /* Apportion the available frame space among the two new windows */
1893 if (!NILP (horflag
))
1895 p
->height
= o
->height
;
1897 XFASTINT (p
->width
) = XFASTINT (o
->width
) - size
;
1898 XFASTINT (o
->width
) = size
;
1899 XFASTINT (p
->left
) = XFASTINT (o
->left
) + size
;
1904 p
->width
= o
->width
;
1905 XFASTINT (p
->height
) = XFASTINT (o
->height
) - size
;
1906 XFASTINT (o
->height
) = size
;
1907 XFASTINT (p
->top
) = XFASTINT (o
->top
) + size
;
1913 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
1914 "Make current window ARG lines bigger.\n\
1915 From program, optional second arg non-nil means grow sideways ARG columns.")
1917 register Lisp_Object n
, side
;
1919 CHECK_NUMBER (n
, 0);
1920 change_window_height (XINT (n
), !NILP (side
));
1924 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
1925 "Make current window ARG lines smaller.\n\
1926 From program, optional second arg non-nil means shrink sideways ARG columns.")
1928 register Lisp_Object n
, side
;
1930 CHECK_NUMBER (n
, 0);
1931 change_window_height (-XINT (n
), !NILP (side
));
1936 window_height (window
)
1939 register struct window
*p
= XWINDOW (window
);
1940 return XFASTINT (p
->height
);
1944 window_width (window
)
1947 register struct window
*p
= XWINDOW (window
);
1948 return XFASTINT (p
->width
);
1951 #define MINSIZE(w) \
1953 ? window_min_width \
1954 : (MINI_WINDOW_P (XWINDOW (w)) ? 1 : window_min_height))
1957 *(widthflag ? (int *) &(XWINDOW (w)->left) : (int *) &(XWINDOW (w)->top))
1959 #define CURSIZE(w) \
1960 *(widthflag ? (int *) &(XWINDOW (w)->width) : (int *) &(XWINDOW (w)->height))
1962 /* Unlike set_window_height, this function
1963 also changes the heights of the siblings so as to
1964 keep everything consistent. */
1966 change_window_height (delta
, widthflag
)
1970 register Lisp_Object parent
;
1972 register struct window
*p
;
1974 int (*sizefun
) () = widthflag
? window_width
: window_height
;
1975 register int (*setsizefun
) () = (widthflag
1977 : set_window_height
);
1979 check_min_window_sizes ();
1981 window
= selected_window
;
1984 p
= XWINDOW (window
);
1989 error ("No other window to side of this one");
1992 if (widthflag
? !NILP (XWINDOW (parent
)->hchild
)
1993 : !NILP (XWINDOW (parent
)->vchild
))
1998 sizep
= &CURSIZE (window
);
2000 if (*sizep
+ delta
< MINSIZE (window
))
2002 Fdelete_window (window
);
2007 register int maxdelta
;
2009 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - *sizep
2010 : !NILP (p
->next
) ? (*sizefun
) (p
->next
) - MINSIZE (p
->next
)
2011 : !NILP (p
->prev
) ? (*sizefun
) (p
->prev
) - MINSIZE (p
->prev
)
2012 /* This is a frame with only one window, a minibuffer-only
2013 or a minibufferless frame. */
2016 if (delta
> maxdelta
)
2017 /* This case traps trying to make the minibuffer
2018 the full frame, or make the only window aside from the
2019 minibuffer the full frame. */
2026 if (!NILP (p
->next
) &&
2027 (*sizefun
) (p
->next
) - delta
>= MINSIZE (p
->next
))
2029 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
) - delta
, 0);
2030 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2031 CURBEG (p
->next
) += delta
;
2032 /* This does not change size of p->next,
2033 but it propagates the new top edge to its children */
2034 (*setsizefun
) (p
->next
, (*sizefun
) (p
->next
), 0);
2036 else if (!NILP (p
->prev
) &&
2037 (*sizefun
) (p
->prev
) - delta
>= MINSIZE (p
->prev
))
2039 (*setsizefun
) (p
->prev
, (*sizefun
) (p
->prev
) - delta
, 0);
2040 CURBEG (window
) -= delta
;
2041 (*setsizefun
) (window
, *sizep
+ delta
, 0);
2045 register int delta1
;
2046 register int opht
= (*sizefun
) (parent
);
2048 /* If trying to grow this window to or beyond size of the parent,
2049 make delta1 so big that, on shrinking back down,
2050 all the siblings end up with less than one line and are deleted. */
2051 if (opht
<= *sizep
+ delta
)
2052 delta1
= opht
* opht
* 2;
2053 /* Otherwise, make delta1 just right so that if we add delta1
2054 lines to this window and to the parent, and then shrink
2055 the parent back to its original size, the new proportional
2056 size of this window will increase by delta. */
2058 delta1
= (delta
* opht
* 100) / ((opht
- *sizep
- delta
) * 100);
2060 /* Add delta1 lines or columns to this window, and to the parent,
2061 keeping things consistent while not affecting siblings. */
2062 CURSIZE (parent
) = opht
+ delta1
;
2063 (*setsizefun
) (window
, *sizep
+ delta1
, 0);
2065 /* Squeeze out delta1 lines or columns from our parent,
2066 shriking this window and siblings proportionately.
2067 This brings parent back to correct size.
2068 Delta1 was calculated so this makes this window the desired size,
2069 taking it all out of the siblings. */
2070 (*setsizefun
) (parent
, opht
, 0);
2073 XFASTINT (p
->last_modified
) = 0;
2080 /* Return number of lines of text (not counting mode line) in W. */
2083 window_internal_height (w
)
2086 int ht
= XFASTINT (w
->height
);
2088 if (MINI_WINDOW_P (w
))
2091 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
2092 || !NILP (w
->next
) || !NILP (w
->prev
)
2093 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
2100 /* Return the number of columns in W.
2101 Don't count columns occupied by scroll bars or the vertical bar
2102 separating W from the sibling to its right. */
2104 window_internal_width (w
)
2107 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
2108 int left
= XINT (w
->left
);
2109 int width
= XINT (w
->width
);
2111 /* If this window is flush against the right edge of the frame, its
2112 internal width is its full width. */
2113 if (left
+ width
>= FRAME_WIDTH (f
))
2116 /* If we are not flush right, then our rightmost columns are
2117 occupied by some sort of separator. */
2119 /* Scroll bars occupy a few columns. */
2120 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2121 return width
- VERTICAL_SCROLL_BAR_WIDTH
;
2123 /* The column of `|' characters separating side-by-side windows
2124 occupies one column only. */
2129 /* Scroll contents of window WINDOW up N lines. */
2132 window_scroll (window
, n
, noerror
)
2137 register struct window
*w
= XWINDOW (window
);
2138 register int opoint
= point
;
2140 register int ht
= window_internal_height (w
);
2141 register Lisp_Object tem
;
2143 Lisp_Object bolp
, nmoved
;
2145 XFASTINT (tem
) = point
;
2146 tem
= Fpos_visible_in_window_p (tem
, window
);
2150 Fvertical_motion (make_number (- ht
/ 2));
2151 XFASTINT (tem
) = point
;
2152 Fset_marker (w
->start
, tem
, w
->buffer
);
2153 w
->force_start
= Qt
;
2156 SET_PT (marker_position (w
->start
));
2157 lose
= n
< 0 && point
== BEGV
;
2158 Fvertical_motion (make_number (n
));
2168 Fsignal (Qbeginning_of_buffer
, Qnil
);
2173 set_marker_restricted (w
->start
, make_number (pos
), w
->buffer
);
2174 w
->start_at_line_beg
= bolp
;
2175 w
->update_mode_line
= Qt
;
2176 XFASTINT (w
->last_modified
) = 0;
2182 tem
= Fvertical_motion (make_number (ht
));
2183 if (point
> opoint
|| XFASTINT (tem
) < ht
)
2186 Fvertical_motion (make_number (-1));
2194 Fsignal (Qend_of_buffer
, Qnil
);
2198 /* This is the guts of Fscroll_up and Fscroll_down. */
2201 scroll_command (n
, direction
)
2202 register Lisp_Object n
;
2205 register int defalt
;
2206 int count
= specpdl_ptr
- specpdl
;
2208 /* If selected window's buffer isn't current, make it current for the moment.
2209 But don't screw up if window_scroll gets an error. */
2210 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
2212 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2213 Fset_buffer (XWINDOW (selected_window
)->buffer
);
2216 defalt
= (window_internal_height (XWINDOW (selected_window
))
2217 - next_screen_context_lines
);
2218 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
2221 window_scroll (selected_window
, defalt
, 0);
2222 else if (EQ (n
, Qminus
))
2223 window_scroll (selected_window
, - defalt
, 0);
2226 n
= Fprefix_numeric_value (n
);
2227 window_scroll (selected_window
, XINT (n
) * direction
, 0);
2230 unbind_to (count
, Qnil
);
2233 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
2234 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
2235 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2236 When calling from a program, supply a number as argument or nil.")
2240 scroll_command (n
, 1);
2244 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
2245 "Scroll text of current window downward ARG lines; or near full screen if no ARG.\n\
2246 A near full screen is `next-screen-context-lines' less than a full screen.\n\
2247 When calling from a program, supply a number as argument or nil.")
2251 scroll_command (n
, -1);
2255 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
2256 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
2257 The next window is the one below the current one; or the one at the top\n\
2258 if the current one is at the bottom.\n\
2259 When calling from a program, supply a number as argument or nil.\n\
2261 If in the minibuffer, `minibuf-scroll-window' if non-nil\n\
2262 specifies the window to scroll.\n\
2263 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
2264 showing that buffer, popping the buffer up if necessary.")
2266 register Lisp_Object n
;
2268 register Lisp_Object window
;
2270 register struct window
*w
;
2271 register int count
= specpdl_ptr
- specpdl
;
2273 if (MINI_WINDOW_P (XWINDOW (selected_window
))
2274 && !NILP (Vminibuf_scroll_window
))
2275 window
= Vminibuf_scroll_window
;
2276 /* If buffer is specified, scroll that buffer. */
2277 else if (!NILP (Vother_window_scroll_buffer
))
2279 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
2281 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
);
2285 /* Nothing specified; look for a neighboring window on the same
2287 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
2289 if (EQ (window
, selected_window
))
2290 /* That didn't get us anywhere; look for a window on another
2293 window
= Fnext_window (window
, Qnil
, Qt
);
2294 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
2295 && ! EQ (window
, selected_window
));
2298 CHECK_LIVE_WINDOW (window
, 0);
2300 if (EQ (window
, selected_window
))
2301 error ("There is no other window");
2303 w
= XWINDOW (window
);
2304 ht
= window_internal_height (w
);
2306 /* Don't screw up if window_scroll gets an error. */
2307 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
2309 Fset_buffer (w
->buffer
);
2310 SET_PT (marker_position (w
->pointm
));
2313 window_scroll (window
, ht
- next_screen_context_lines
, 1);
2314 else if (EQ (n
, Qminus
))
2315 window_scroll (window
, next_screen_context_lines
- ht
, 1);
2318 if (XTYPE (n
) == Lisp_Cons
)
2320 CHECK_NUMBER (n
, 0);
2321 window_scroll (window
, XINT (n
), 1);
2324 Fset_marker (w
->pointm
, make_number (point
), Qnil
);
2325 unbind_to (count
, Qnil
);
2330 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
2331 "Scroll selected window display ARG columns left.\n\
2332 Default for ARG is window width minus 2.")
2334 register Lisp_Object arg
;
2338 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2340 arg
= Fprefix_numeric_value (arg
);
2343 Fset_window_hscroll (selected_window
,
2344 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2348 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
2349 "Scroll selected window display ARG columns right.\n\
2350 Default for ARG is window width minus 2.")
2352 register Lisp_Object arg
;
2355 XFASTINT (arg
) = window_internal_width (XWINDOW (selected_window
)) - 2;
2357 arg
= Fprefix_numeric_value (arg
);
2360 Fset_window_hscroll (selected_window
,
2361 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
2365 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
2366 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
2367 The desired position of point is always relative to the current window.\n\
2368 Just C-u as prefix means put point in the center of the window.\n\
2369 No arg (i.e., it is nil) erases the entire frame and then\n\
2370 redraws with point in the center of the current window.")
2372 register Lisp_Object n
;
2374 register struct window
*w
= XWINDOW (selected_window
);
2375 register int ht
= window_internal_height (w
);
2376 register int opoint
= point
;
2380 extern int frame_garbaged
;
2382 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
2383 XFASTINT (n
) = ht
/ 2;
2385 else if (XTYPE (n
) == Lisp_Cons
) /* Just C-u. */
2387 XFASTINT (n
) = ht
/ 2;
2391 n
= Fprefix_numeric_value (n
);
2392 CHECK_NUMBER (n
, 0);
2396 XSETINT (n
, XINT (n
) + ht
);
2398 XSETINT (n
, - XINT (n
));
2400 Fvertical_motion (n
);
2401 Fset_marker (w
->start
, make_number (point
), w
->buffer
);
2402 w
->start_at_line_beg
= Fbolp ();
2405 w
->force_start
= Qt
;
2410 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
2412 "Position point relative to window.\n\
2413 With no argument, position text at center of window.\n\
2414 An argument specifies frame line; zero means top of window,\n\
2415 negative means relative to bottom of window.")
2417 register Lisp_Object arg
;
2419 register struct window
*w
= XWINDOW (selected_window
);
2420 register int height
= window_internal_height (w
);
2424 XFASTINT (arg
) = height
/ 2;
2427 arg
= Fprefix_numeric_value (arg
);
2429 XSETINT (arg
, XINT (arg
) + height
);
2432 start
= marker_position (w
->start
);
2433 if (start
< BEGV
|| start
> ZV
)
2435 Fvertical_motion (make_number (- height
/ 2));
2436 Fset_marker (w
->start
, make_number (point
), w
->buffer
);
2437 w
->start_at_line_beg
= Fbolp ();
2438 w
->force_start
= Qt
;
2443 return Fvertical_motion (arg
);
2446 struct save_window_data
2448 int size_from_Lisp_Vector_struct
;
2449 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2450 Lisp_Object frame_width
, frame_height
;
2451 Lisp_Object selected_frame
;
2452 Lisp_Object current_window
;
2453 Lisp_Object current_buffer
;
2454 Lisp_Object minibuf_scroll_window
;
2455 Lisp_Object root_window
;
2456 Lisp_Object focus_frame
;
2457 /* A vector, interpreted as a struct saved_window */
2458 Lisp_Object saved_windows
;
2461 /* Arg to Fmake_vector */
2462 #define SAVE_WINDOW_DATA_SIZE \
2463 ((sizeof (struct save_window_data) \
2464 - (sizeof (struct Lisp_Vector) \
2465 /* Don't count the contents member of the struct Lisp_Vector */ \
2466 - sizeof (Lisp_Object))) \
2467 / sizeof (Lisp_Object))
2469 /* This is saved as a Lisp_Vector */
2472 /* these first two must agree with struct Lisp_Vector in lisp.h */
2473 int size_from_Lisp_Vector_struct
;
2474 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
2477 Lisp_Object buffer
, start
, pointm
, mark
;
2478 Lisp_Object left
, top
, width
, height
, hscroll
;
2479 Lisp_Object parent
, prev
;
2480 Lisp_Object start_at_line_beg
;
2481 Lisp_Object display_table
;
2483 #define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
2485 #define SAVED_WINDOW_N(swv,n) \
2486 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
2488 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
2489 "T if OBJECT is a window-configration object.")
2493 if (XTYPE (obj
) == Lisp_Window_Configuration
)
2499 DEFUN ("set-window-configuration", Fset_window_configuration
,
2500 Sset_window_configuration
, 1, 1, 0,
2501 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
2502 CONFIGURATION must be a value previously returned\n\
2503 by `current-window-configuration' (which see).")
2505 Lisp_Object configuration
;
2507 register struct save_window_data
*data
;
2508 struct Lisp_Vector
*saved_windows
;
2509 Lisp_Object new_current_buffer
;
2513 while (XTYPE (configuration
) != Lisp_Window_Configuration
)
2515 configuration
= wrong_type_argument (intern ("window-configuration-p"),
2519 data
= (struct save_window_data
*) XVECTOR (configuration
);
2520 saved_windows
= XVECTOR (data
->saved_windows
);
2522 new_current_buffer
= data
->current_buffer
;
2523 if (NILP (XBUFFER (new_current_buffer
)->name
))
2524 new_current_buffer
= Qnil
;
2526 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
2529 /* If f is a dead frame, don't bother rebuilding its window tree.
2530 However, there is other stuff we should still try to do below. */
2531 if (FRAME_LIVE_P (f
))
2533 register struct window
*w
;
2534 register struct saved_window
*p
;
2537 /* If the frame has been resized since this window configuration was
2538 made, we change the frame to the size specified in the
2539 configuration, restore the configuration, and then resize it
2540 back. We keep track of the prevailing height in these variables. */
2541 int previous_frame_height
= FRAME_HEIGHT (f
);
2542 int previous_frame_width
= FRAME_WIDTH (f
);
2544 if (XFASTINT (data
->frame_height
) != previous_frame_height
2545 || XFASTINT (data
->frame_width
) != previous_frame_width
)
2546 change_frame_size (f
, data
->frame_height
, data
->frame_width
, 0, 0);
2548 windows_or_buffers_changed
++;
2551 Mark all windows now on frame as "deleted".
2552 Restoring the new configuration "undeletes" any that are in it.
2554 Save their current buffers in their height fields, since we may
2555 need it later, if a buffer saved in the configuration is now
2557 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2559 for (k
= 0; k
< saved_windows
->size
; k
++)
2561 p
= SAVED_WINDOW_N (saved_windows
, k
);
2562 w
= XWINDOW (p
->window
);
2565 if (!NILP (p
->parent
))
2566 w
->parent
= SAVED_WINDOW_N (saved_windows
,
2567 XFASTINT (p
->parent
))->window
;
2571 if (!NILP (p
->prev
))
2573 w
->prev
= SAVED_WINDOW_N (saved_windows
,
2574 XFASTINT (p
->prev
))->window
;
2575 XWINDOW (w
->prev
)->next
= p
->window
;
2580 if (!NILP (w
->parent
))
2582 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
2584 XWINDOW (w
->parent
)->vchild
= p
->window
;
2585 XWINDOW (w
->parent
)->hchild
= Qnil
;
2589 XWINDOW (w
->parent
)->hchild
= p
->window
;
2590 XWINDOW (w
->parent
)->vchild
= Qnil
;
2595 /* If we squirreled away the buffer in the window's height,
2597 if (XTYPE (w
->height
) == Lisp_Buffer
)
2598 w
->buffer
= w
->height
;
2601 w
->width
= p
->width
;
2602 w
->height
= p
->height
;
2603 w
->hscroll
= p
->hscroll
;
2604 w
->display_table
= p
->display_table
;
2605 XFASTINT (w
->last_modified
) = 0;
2607 /* Reinstall the saved buffer and pointers into it. */
2608 if (NILP (p
->buffer
))
2609 w
->buffer
= p
->buffer
;
2612 if (!NILP (XBUFFER (p
->buffer
)->name
))
2613 /* If saved buffer is alive, install it. */
2615 w
->buffer
= p
->buffer
;
2616 w
->start_at_line_beg
= p
->start_at_line_beg
;
2617 set_marker_restricted (w
->start
,
2618 Fmarker_position (p
->start
),
2620 set_marker_restricted (w
->pointm
,
2621 Fmarker_position (p
->pointm
),
2623 Fset_marker (XBUFFER (w
->buffer
)->mark
,
2624 Fmarker_position (p
->mark
), w
->buffer
);
2626 /* As documented in Fcurrent_window_configuration, don't
2627 save the location of point in the buffer which was current
2628 when the window configuration was recorded. */
2629 if (!EQ (p
->buffer
, new_current_buffer
) &&
2630 XBUFFER (p
->buffer
) == current_buffer
)
2631 Fgoto_char (w
->pointm
);
2633 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
2634 /* Else unless window has a live buffer, get one. */
2636 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
2637 /* This will set the markers to beginning of visible
2639 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
2640 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
2641 w
->start_at_line_beg
= Qt
;
2644 /* Keeping window's old buffer; make sure the markers
2647 /* Set window markers at start of visible range. */
2648 if (XMARKER (w
->start
)->buffer
== 0)
2649 set_marker_restricted (w
->start
, make_number (0),
2651 if (XMARKER (w
->pointm
)->buffer
== 0)
2652 set_marker_restricted (w
->pointm
,
2654 (BUF_PT (XBUFFER (w
->buffer
)))),
2656 w
->start_at_line_beg
= Qt
;
2661 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
2662 Fselect_window (data
->current_window
);
2665 if (NILP (data
->focus_frame
)
2666 || (XTYPE (data
->focus_frame
) == Lisp_Frame
2667 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
2668 Fredirect_frame_focus (frame
, data
->focus_frame
);
2671 #if 0 /* I don't understand why this is needed, and it causes problems
2672 when the frame's old selected window has been deleted. */
2674 if (f
!= selected_frame
&& ! FRAME_TERMCAP_P (f
))
2675 Fhandle_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)), Qnil
);
2679 /* Set the screen height to the value it had before this function. */
2680 if (previous_frame_height
!= FRAME_HEIGHT (f
)
2681 || previous_frame_width
!= FRAME_WIDTH (f
))
2682 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
2687 /* Fselect_window will have made f the selected frame, so we
2688 reselect the proper frame here. Fhandle_switch_frame will change the
2689 selected window too, but that doesn't make the call to
2690 Fselect_window above totally superfluous; it still sets f's
2692 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
2693 Fhandle_switch_frame (data
->selected_frame
, Qnil
);
2696 if (!NILP (new_current_buffer
))
2697 Fset_buffer (new_current_buffer
);
2699 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
2703 /* Mark all windows now on frame as deleted
2704 by setting their buffers to nil. */
2707 delete_all_subwindows (w
)
2708 register struct window
*w
;
2710 if (!NILP (w
->next
))
2711 delete_all_subwindows (XWINDOW (w
->next
));
2712 if (!NILP (w
->vchild
))
2713 delete_all_subwindows (XWINDOW (w
->vchild
));
2714 if (!NILP (w
->hchild
))
2715 delete_all_subwindows (XWINDOW (w
->hchild
));
2717 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
2719 /* We set all three of these fields to nil, to make sure that we can
2720 distinguish this dead window from any live window. Live leaf
2721 windows will have buffer set, and combination windows will have
2722 vchild or hchild set. */
2729 count_windows (window
)
2730 register struct window
*window
;
2732 register int count
= 1;
2733 if (!NILP (window
->next
))
2734 count
+= count_windows (XWINDOW (window
->next
));
2735 if (!NILP (window
->vchild
))
2736 count
+= count_windows (XWINDOW (window
->vchild
));
2737 if (!NILP (window
->hchild
))
2738 count
+= count_windows (XWINDOW (window
->hchild
));
2743 save_window_save (window
, vector
, i
)
2745 struct Lisp_Vector
*vector
;
2748 register struct saved_window
*p
;
2749 register struct window
*w
;
2750 register Lisp_Object tem
;
2752 for (;!NILP (window
); window
= w
->next
)
2754 p
= SAVED_WINDOW_N (vector
, i
);
2755 w
= XWINDOW (window
);
2757 XFASTINT (w
->temslot
) = i
++;
2759 p
->buffer
= w
->buffer
;
2762 p
->width
= w
->width
;
2763 p
->height
= w
->height
;
2764 p
->hscroll
= w
->hscroll
;
2765 p
->display_table
= w
->display_table
;
2766 if (!NILP (w
->buffer
))
2768 /* Save w's value of point in the window configuration.
2769 If w is the selected window, then get the value of point
2770 from the buffer; pointm is garbage in the selected window. */
2771 if (EQ (window
, selected_window
))
2773 p
->pointm
= Fmake_marker ();
2774 Fset_marker (p
->pointm
, BUF_PT (XBUFFER (w
->buffer
)),
2778 p
->pointm
= Fcopy_marker (w
->pointm
);
2780 p
->start
= Fcopy_marker (w
->start
);
2781 p
->start_at_line_beg
= w
->start_at_line_beg
;
2783 tem
= XBUFFER (w
->buffer
)->mark
;
2784 p
->mark
= Fcopy_marker (tem
);
2791 p
->start_at_line_beg
= Qnil
;
2794 if (NILP (w
->parent
))
2797 p
->parent
= XWINDOW (w
->parent
)->temslot
;
2802 p
->prev
= XWINDOW (w
->prev
)->temslot
;
2804 if (!NILP (w
->vchild
))
2805 i
= save_window_save (w
->vchild
, vector
, i
);
2806 if (!NILP (w
->hchild
))
2807 i
= save_window_save (w
->hchild
, vector
, i
);
2813 DEFUN ("current-window-configuration",
2814 Fcurrent_window_configuration
, Scurrent_window_configuration
, 0, 1, 0,
2815 "Return an object representing the current window configuration of FRAME.\n\
2816 If FRAME is nil or omitted, use the selected frame.\n\
2817 This describes the number of windows, their sizes and current buffers,\n\
2818 and for each displayed buffer, where display starts, and the positions of\n\
2819 point and mark. An exception is made for point in the current buffer:\n\
2820 its value is -not- saved.\n\
2821 This also records the currently selected frame, and FRAME's focus\n\
2822 redirection (see `redirect-frame-focus').")
2826 register Lisp_Object tem
;
2827 register int n_windows
;
2828 register struct save_window_data
*data
;
2836 CHECK_LIVE_FRAME (frame
, 0);
2840 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2841 data
= (struct save_window_data
*)
2842 XVECTOR (Fmake_vector (make_number (SAVE_WINDOW_DATA_SIZE
),
2844 XFASTINT (data
->frame_width
) = FRAME_WIDTH (f
);
2845 XFASTINT (data
->frame_height
) = FRAME_HEIGHT (f
);
2847 XSET (data
->selected_frame
, Lisp_Frame
, selected_frame
);
2849 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
2850 XSET (data
->current_buffer
, Lisp_Buffer
, current_buffer
);
2851 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
2852 data
->root_window
= FRAME_ROOT_WINDOW (f
);
2853 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
2854 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
2855 data
->saved_windows
= tem
;
2856 for (i
= 0; i
< n_windows
; i
++)
2857 XVECTOR (tem
)->contents
[i
]
2858 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
2859 save_window_save (FRAME_ROOT_WINDOW (f
),
2861 XSET (tem
, Lisp_Window_Configuration
, data
);
2865 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
2867 "Execute body, preserving window sizes and contents.\n\
2868 Restores which buffer appears in which window, where display starts,\n\
2869 as well as the current buffer.\n\
2870 Does not restore the value of point in current buffer.")
2874 register Lisp_Object val
;
2875 register int count
= specpdl_ptr
- specpdl
;
2877 record_unwind_protect (Fset_window_configuration
,
2878 Fcurrent_window_configuration (Qnil
));
2879 val
= Fprogn (args
);
2880 return unbind_to (count
, val
);
2886 selected_frame
= make_terminal_frame ();
2887 minibuf_window
= selected_frame
->minibuffer_window
;
2888 selected_window
= selected_frame
->selected_window
;
2889 last_nonminibuf_frame
= selected_frame
;
2890 #else /* not MULTI_FRAME */
2891 extern Lisp_Object
get_minibuffer ();
2893 minibuf_window
= make_window ();
2894 FRAME_ROOT_WINDOW (selected_frame
) = make_window ();
2896 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->next
= minibuf_window
;
2897 XWINDOW (minibuf_window
)->prev
= FRAME_ROOT_WINDOW (selected_frame
);
2898 XWINDOW (minibuf_window
)->mini_p
= Qt
;
2900 /* These values 9 and 10 are arbitrary,
2901 just so that there is "something there."
2902 Correct values are put in in init_xdisp */
2904 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->width
) = 10;
2905 XFASTINT (XWINDOW (minibuf_window
)->width
) = 10;
2907 XFASTINT (XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->height
) = 9;
2908 XFASTINT (XWINDOW (minibuf_window
)->top
) = 9;
2909 XFASTINT (XWINDOW (minibuf_window
)->height
) = 1;
2911 /* Prevent error in Fset_window_buffer. */
2912 XWINDOW (FRAME_ROOT_WINDOW (selected_frame
))->buffer
= Qt
;
2913 XWINDOW (minibuf_window
)->buffer
= Qt
;
2915 /* Now set them up for real. */
2916 Fset_window_buffer (FRAME_ROOT_WINDOW (selected_frame
),
2917 Fcurrent_buffer ());
2918 Fset_window_buffer (minibuf_window
, get_minibuffer (0));
2920 selected_window
= FRAME_ROOT_WINDOW (selected_frame
);
2921 /* Make sure this window seems more recently used than
2922 a newly-created, never-selected window. Increment
2923 window_select_count so the first selection ever will get
2924 something newer than this. */
2925 XFASTINT (XWINDOW (selected_window
)->use_time
) = ++window_select_count
;
2926 #endif /* not MULTI_FRAME */
2931 Qwindowp
= intern ("windowp");
2932 staticpro (&Qwindowp
);
2934 Qwindow_live_p
= intern ("window-live-p");
2935 staticpro (&Qwindow_live_p
);
2938 /* Make sure all windows get marked */
2939 staticpro (&minibuf_window
);
2942 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
2943 "Non-nil means call as function to display a help buffer.\n\
2944 Used by `with-output-to-temp-buffer'.");
2945 Vtemp_buffer_show_function
= Qnil
;
2947 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
2948 "If non-nil, function to call to handle `display-buffer'.\n\
2949 It will receive two args, the buffer and a flag which if non-nil means\n\
2950 that the currently selected window is not acceptable.\n\
2951 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
2952 work using this function.");
2953 Vdisplay_buffer_function
= Qnil
;
2955 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
2956 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
2957 Vminibuf_scroll_window
= Qnil
;
2959 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
2960 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
2961 Vother_window_scroll_buffer
= Qnil
;
2963 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
2964 "*Non-nil means `display-buffer' should make a separate frame.");
2967 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
2968 "*If non-nil, function to call to handle automatic new frame creation.\n\
2969 It is called with no arguments and should return a newly created frame.\n\
2971 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
2972 where `pop-up-frame-alist' would hold the default frame parameters.");
2973 Vpop_up_frame_function
= Qnil
;
2975 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
2976 "*Non-nil means display-buffer should make new windows.");
2979 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
2980 "*Number of lines of continuity when scrolling by screenfuls.");
2981 next_screen_context_lines
= 2;
2983 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
2984 "*display-buffer would prefer to split the largest window if this large.\n\
2985 If there is only one window, it is split regardless of this value.");
2986 split_height_threshold
= 500;
2988 DEFVAR_INT ("window-min-height", &window_min_height
,
2989 "*Delete any window less than this tall (including its mode line).");
2990 window_min_height
= 4;
2992 DEFVAR_INT ("window-min-width", &window_min_width
,
2993 "*Delete any window less than this wide.");
2994 window_min_width
= 10;
2996 defsubr (&Sselected_window
);
2997 defsubr (&Sminibuffer_window
);
2998 defsubr (&Swindow_minibuffer_p
);
2999 defsubr (&Swindowp
);
3000 defsubr (&Swindow_live_p
);
3001 defsubr (&Spos_visible_in_window_p
);
3002 defsubr (&Swindow_buffer
);
3003 defsubr (&Swindow_height
);
3004 defsubr (&Swindow_width
);
3005 defsubr (&Swindow_hscroll
);
3006 defsubr (&Sset_window_hscroll
);
3007 defsubr (&Swindow_edges
);
3008 defsubr (&Scoordinates_in_window_p
);
3009 defsubr (&Swindow_at
);
3010 defsubr (&Swindow_point
);
3011 defsubr (&Swindow_start
);
3012 defsubr (&Swindow_end
);
3013 defsubr (&Sset_window_point
);
3014 defsubr (&Sset_window_start
);
3015 defsubr (&Swindow_dedicated_p
);
3016 defsubr (&Sset_window_dedicated_p
);
3017 defsubr (&Swindow_display_table
);
3018 defsubr (&Sset_window_display_table
);
3019 defsubr (&Snext_window
);
3020 defsubr (&Sprevious_window
);
3021 defsubr (&Sother_window
);
3022 defsubr (&Sget_lru_window
);
3023 defsubr (&Sget_largest_window
);
3024 defsubr (&Sget_buffer_window
);
3025 defsubr (&Sdelete_other_windows
);
3026 defsubr (&Sdelete_windows_on
);
3027 defsubr (&Sreplace_buffer_in_windows
);
3028 defsubr (&Sdelete_window
);
3029 defsubr (&Sset_window_buffer
);
3030 defsubr (&Sselect_window
);
3031 defsubr (&Sdisplay_buffer
);
3032 defsubr (&Ssplit_window
);
3033 defsubr (&Senlarge_window
);
3034 defsubr (&Sshrink_window
);
3035 defsubr (&Sscroll_up
);
3036 defsubr (&Sscroll_down
);
3037 defsubr (&Sscroll_left
);
3038 defsubr (&Sscroll_right
);
3039 defsubr (&Sscroll_other_window
);
3040 defsubr (&Srecenter
);
3041 defsubr (&Smove_to_window_line
);
3042 defsubr (&Swindow_configuration_p
);
3043 defsubr (&Sset_window_configuration
);
3044 defsubr (&Scurrent_window_configuration
);
3045 defsubr (&Ssave_window_excursion
);
3050 initial_define_key (control_x_map
, '1', "delete-other-windows");
3051 initial_define_key (control_x_map
, '2', "split-window");
3052 initial_define_key (control_x_map
, '0', "delete-window");
3053 initial_define_key (control_x_map
, 'o', "other-window");
3054 initial_define_key (control_x_map
, '^', "enlarge-window");
3055 initial_define_key (control_x_map
, '<', "scroll-left");
3056 initial_define_key (control_x_map
, '>', "scroll-right");
3058 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
3059 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
3060 initial_define_key (meta_map
, 'v', "scroll-down");
3062 initial_define_key (global_map
, Ctl('L'), "recenter");
3063 initial_define_key (meta_map
, 'r', "move-to-window-line");