1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000, 2001
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
34 #include "dispextern.h"
35 #include "blockinput.h"
36 #include "intervals.h"
40 #endif /* HAVE_X_WINDOWS */
51 /* Values returned from coordinates_in_window. */
65 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
66 Lisp_Object Qwindow_size_fixed
, Qleft_fringe
, Qright_fringe
;
67 extern Lisp_Object Qheight
, Qwidth
;
69 static int displayed_window_lines
P_ ((struct window
*));
70 static struct window
*decode_window
P_ ((Lisp_Object
));
71 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
72 static int count_windows
P_ ((struct window
*));
73 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
74 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
75 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
76 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
77 static int window_min_size_1
P_ ((struct window
*, int));
78 static int window_min_size
P_ ((struct window
*, int, int, int *));
79 static void size_window
P_ ((Lisp_Object
, int, int, int));
80 static int freeze_window_start
P_ ((struct window
*, void *));
81 static int window_fixed_size_p
P_ ((struct window
*, int, int));
82 static void enlarge_window
P_ ((Lisp_Object
, int, int));
83 static Lisp_Object window_list
P_ ((void));
84 static int add_window_to_list
P_ ((struct window
*, void *));
85 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
87 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
89 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
91 static int foreach_window_1
P_ ((struct window
*,
92 int (* fn
) (struct window
*, void *),
94 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
96 /* The value of `window-size-fixed'. */
98 int window_size_fixed
;
100 /* This is the window in which the terminal's cursor should
101 be left when nothing is being done with it. This must
102 always be a leaf window, and its buffer is selected by
103 the top level editing loop at the end of each command.
105 This value is always the same as
106 FRAME_SELECTED_WINDOW (selected_frame). */
108 Lisp_Object selected_window
;
110 /* A list of all windows for use by next_window and Fwindow_list.
111 Functions creating or deleting windows should invalidate this cache
112 by setting it to nil. */
114 Lisp_Object Vwindow_list
;
116 /* The mini-buffer window of the selected frame.
117 Note that you cannot test for mini-bufferness of an arbitrary window
118 by comparing against this; but you can test for mini-bufferness of
119 the selected window. */
121 Lisp_Object minibuf_window
;
123 /* Non-nil means it is the window for C-M-v to scroll
124 when the mini-buffer is selected. */
126 Lisp_Object Vminibuf_scroll_window
;
128 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
130 Lisp_Object Vother_window_scroll_buffer
;
132 /* Non-nil means it's function to call to display temp buffers. */
134 Lisp_Object Vtemp_buffer_show_function
;
136 /* If a window gets smaller than either of these, it is removed. */
138 int window_min_height
;
139 int window_min_width
;
141 /* Nonzero implies Fdisplay_buffer should create windows. */
145 /* Nonzero implies make new frames for Fdisplay_buffer. */
149 /* Nonzero means reuse existing frames for displaying buffers. */
151 int display_buffer_reuse_frames
;
153 /* Non-nil means use this function instead of default */
155 Lisp_Object Vpop_up_frame_function
;
157 /* Function to call to handle Fdisplay_buffer. */
159 Lisp_Object Vdisplay_buffer_function
;
161 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
163 Lisp_Object Veven_window_heights
;
165 /* List of buffer *names* for buffers that should have their own frames. */
167 Lisp_Object Vspecial_display_buffer_names
;
169 /* List of regexps for buffer names that should have their own frames. */
171 Lisp_Object Vspecial_display_regexps
;
173 /* Function to pop up a special frame. */
175 Lisp_Object Vspecial_display_function
;
177 /* List of buffer *names* for buffers to appear in selected window. */
179 Lisp_Object Vsame_window_buffer_names
;
181 /* List of regexps for buffer names to appear in selected window. */
183 Lisp_Object Vsame_window_regexps
;
185 /* Hook run at end of temp_output_buffer_show. */
187 Lisp_Object Qtemp_buffer_show_hook
;
189 /* Fdisplay_buffer always splits the largest window
190 if that window is more than this high. */
192 int split_height_threshold
;
194 /* Number of lines of continuity in scrolling by screenfuls. */
196 int next_screen_context_lines
;
198 /* Incremented for each window created. */
200 static int sequence_number
;
202 /* Nonzero after init_window_once has finished. */
204 static int window_initialized
;
206 /* Hook to run when window config changes. */
208 Lisp_Object Qwindow_configuration_change_hook
;
209 Lisp_Object Vwindow_configuration_change_hook
;
211 /* Nonzero means scroll commands try to put point
212 at the same screen height as previously. */
214 Lisp_Object Vscroll_preserve_screen_position
;
216 #if 0 /* This isn't used anywhere. */
217 /* Nonzero means we can split a frame even if it is "unsplittable". */
218 static int inhibit_frame_unsplittable
;
221 extern int scroll_margin
;
223 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
225 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
226 doc
: /* Returns t if OBJECT is a window. */)
230 return WINDOWP (object
) ? Qt
: Qnil
;
233 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
234 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
238 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
245 register struct window
*p
;
247 p
= allocate_window ();
248 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
249 XSETFASTINT (p
->left
, 0);
250 XSETFASTINT (p
->top
, 0);
251 XSETFASTINT (p
->height
, 0);
252 XSETFASTINT (p
->width
, 0);
253 XSETFASTINT (p
->hscroll
, 0);
254 XSETFASTINT (p
->min_hscroll
, 0);
255 p
->orig_top
= p
->orig_height
= Qnil
;
256 p
->start
= Fmake_marker ();
257 p
->pointm
= Fmake_marker ();
258 XSETFASTINT (p
->use_time
, 0);
260 p
->display_table
= Qnil
;
262 p
->pseudo_window_p
= 0;
263 bzero (&p
->cursor
, sizeof (p
->cursor
));
264 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
265 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
266 p
->desired_matrix
= p
->current_matrix
= 0;
267 p
->phys_cursor_type
= -1;
268 p
->must_be_updated_p
= 0;
269 XSETFASTINT (p
->window_end_vpos
, 0);
270 XSETFASTINT (p
->window_end_pos
, 0);
271 p
->window_end_valid
= Qnil
;
274 XSETFASTINT (p
->last_point
, 0);
275 p
->frozen_window_start_p
= 0;
281 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
282 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
285 return selected_window
;
288 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
289 doc
: /* Return the window used now for minibuffers.
290 If the optional argument FRAME is specified, return the minibuffer window
291 used by that frame. */)
296 frame
= selected_frame
;
297 CHECK_LIVE_FRAME (frame
, 0);
298 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
301 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
302 doc
: /* Returns non-nil if WINDOW is a minibuffer window. */)
306 struct window
*w
= decode_window (window
);
307 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
311 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
312 Spos_visible_in_window_p
, 0, 3, 0,
313 doc
: /* Return t if position POS is currently on the frame in WINDOW.
314 Return nil if that position is scrolled vertically out of view.
315 If a character is only partially visible, nil is returned, unless the
316 optional argument PARTIALLY is non-nil.
317 POS defaults to point in WINDOW; WINDOW defaults to the selected window. */)
318 (pos
, window
, partially
)
319 Lisp_Object pos
, window
, partially
;
321 register struct window
*w
;
323 register struct buffer
*buf
;
325 Lisp_Object in_window
;
328 w
= decode_window (window
);
329 buf
= XBUFFER (w
->buffer
);
330 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
334 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
337 else if (w
== XWINDOW (selected_window
))
340 posint
= XMARKER (w
->pointm
)->charpos
;
342 /* If position is above window start, it's not visible. */
343 if (posint
< CHARPOS (top
))
345 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
346 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
347 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
349 /* If frame is up-to-date, and POSINT is < window end pos, use
350 that info. This doesn't work for POSINT == end pos, because
351 the window end pos is actually the position _after_ the last
352 char in the window. */
353 if (NILP (partially
))
355 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
356 in_window
= fully_p
? Qt
: Qnil
;
361 else if (posint
> BUF_ZV (buf
))
363 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
364 /* If window start is out of range, do something reasonable. */
368 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
369 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
378 static struct window
*
379 decode_window (window
)
380 register Lisp_Object window
;
383 return XWINDOW (selected_window
);
385 CHECK_LIVE_WINDOW (window
, 0);
386 return XWINDOW (window
);
389 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
390 doc
: /* Return the buffer that WINDOW is displaying. */)
394 return decode_window (window
)->buffer
;
397 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
398 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
402 return decode_window (window
)->height
;
405 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
406 doc
: /* Return the number of display columns in WINDOW.
407 This is the width that is usable columns available for text in WINDOW.
408 If you want to find out how many columns WINDOW takes up,
409 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
413 return make_number (window_internal_width (decode_window (window
)));
416 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
417 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
421 return decode_window (window
)->hscroll
;
424 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
425 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
426 NCOL should be zero or positive. */)
428 Lisp_Object window
, ncol
;
430 struct window
*w
= decode_window (window
);
433 CHECK_NUMBER (ncol
, 1);
434 hscroll
= max (0, XINT (ncol
));
436 /* Prevent redisplay shortcuts when changing the hscroll. */
437 if (XINT (w
->hscroll
) != hscroll
)
438 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
440 w
->hscroll
= make_number (hscroll
);
444 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
445 Swindow_redisplay_end_trigger
, 0, 1, 0,
446 doc
: /* Return WINDOW's redisplay end trigger value.
447 See `set-window-redisplay-end-trigger' for more information. */)
451 return decode_window (window
)->redisplay_end_trigger
;
454 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
455 Sset_window_redisplay_end_trigger
, 2, 2, 0,
456 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
457 VALUE should be a buffer position (typically a marker) or nil.
458 If it is a buffer position, then if redisplay in WINDOW reaches a position
459 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
460 with two arguments: WINDOW, and the end trigger value.
461 Afterwards the end-trigger value is reset to nil. */)
463 register Lisp_Object window
, value
;
465 register struct window
*w
;
467 w
= decode_window (window
);
468 w
->redisplay_end_trigger
= value
;
472 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
473 doc
: /* Return a list of the edge coordinates of WINDOW.
474 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
475 RIGHT is one more than the rightmost column used by WINDOW,
476 and BOTTOM is one more than the bottommost row used by WINDOW
477 and its mode-line. */)
481 register struct window
*w
= decode_window (window
);
483 return Fcons (w
->left
, Fcons (w
->top
,
484 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
485 Fcons (make_number (XFASTINT (w
->top
)
486 + XFASTINT (w
->height
)),
490 /* Test if the character at column *X, row *Y is within window W.
491 If it is not, return 0;
492 if it is in the window's text area,
493 set *x and *y to its location relative to the upper left corner
496 if it is on the window's modeline, return 2;
497 if it is on the border between the window and its right sibling,
499 if it is on the window's top line, return 4;
500 if it is in the bitmap area to the left/right of the window,
501 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
503 X and Y are frame relative pixel coordinates. */
505 static enum window_part
506 coordinates_in_window (w
, x
, y
)
507 register struct window
*w
;
510 /* Let's make this a global enum later, instead of using numbers
512 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
513 int left_x
, right_x
, top_y
, bottom_y
;
514 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
515 enum window_part part
;
516 int ux
= CANON_X_UNIT (f
);
517 int x0
= XFASTINT (w
->left
) * ux
;
518 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
519 /* The width of the area where the vertical line can be dragged.
520 (Between mode lines for instance. */
521 int grabbable_width
= ux
;
523 if (*x
< x0
|| *x
>= x1
)
526 /* In what's below, we subtract 1 when computing right_x because we
527 want the rightmost pixel, which is given by left_pixel+width-1. */
528 if (w
->pseudo_window_p
)
531 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
532 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
533 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
537 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
538 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
539 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
540 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
541 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
542 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
545 /* On the mode line or header line? If it's near the start of
546 the mode or header line of window that's has a horizontal
547 sibling, say it's on the vertical line. That's to be able
548 to resize windows horizontally in case we're using toolkit
551 if (WINDOW_WANTS_MODELINE_P (w
)
552 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
555 /* We're somewhere on the mode line. We consider the place
556 between mode lines of horizontally adjacent mode lines
557 as the vertical border. If scroll bars on the left,
558 return the right window. */
561 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
563 if (abs (*x
- x0
) < grabbable_width
)
564 part
= ON_VERTICAL_BORDER
;
566 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
567 part
= ON_VERTICAL_BORDER
;
569 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
570 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
573 part
= ON_HEADER_LINE
;
575 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
577 if (abs (*x
- x0
) < grabbable_width
)
578 part
= ON_VERTICAL_BORDER
;
580 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
581 part
= ON_VERTICAL_BORDER
;
583 /* Outside anything interesting? */
588 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
591 + FRAME_RIGHT_SCROLL_BAR_WIDTH (f
) * ux
))
595 else if (FRAME_WINDOW_P (f
))
597 if (!w
->pseudo_window_p
598 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
599 && !WINDOW_RIGHTMOST_P (w
)
600 && (abs (*x
- right_x
- flags_area_width
) < grabbable_width
))
602 part
= ON_VERTICAL_BORDER
;
604 else if (*x
< left_x
|| *x
> right_x
)
606 /* Other lines than the mode line don't include flags areas and
607 scroll bars on the left. */
609 /* Convert X and Y to window-relative pixel coordinates. */
612 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
623 /* Need to say "*x > right_x" rather than >=, since on character
624 terminals, the vertical line's x coordinate is right_x. */
625 if (*x
< left_x
|| *x
> right_x
)
627 /* Other lines than the mode line don't include flags areas and
628 scroll bars on the left. */
630 /* Convert X and Y to window-relative pixel coordinates. */
633 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
635 /* Here, too, "*x > right_x" is because of character terminals. */
636 else if (!w
->pseudo_window_p
637 && !WINDOW_RIGHTMOST_P (w
)
638 && *x
> right_x
- ux
)
640 /* On the border on the right side of the window? Assume that
641 this area begins at RIGHT_X minus a canonical char width. */
642 part
= ON_VERTICAL_BORDER
;
646 /* Convert X and Y to window-relative pixel coordinates. */
657 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
658 Scoordinates_in_window_p
, 2, 2, 0,
659 doc
: /* Return non-nil if COORDINATES are in WINDOW.
660 COORDINATES is a cons of the form (X . Y), X and Y being distances
661 measured in characters from the upper-left corner of the frame.
662 \(0 . 0) denotes the character in the upper left corner of the
664 If COORDINATES are in the text portion of WINDOW,
665 the coordinates relative to the window are returned.
666 If they are in the mode line of WINDOW, `mode-line' is returned.
667 If they are in the top mode line of WINDOW, `header-line' is returned.
668 If they are in the fringe to the left of the window,
669 `left-fringe' is returned, if they are in the area on the right of
670 the window, `right-fringe' is returned.
671 If they are on the border between WINDOW and its right sibling,
672 `vertical-line' is returned. */)
673 (coordinates
, window
)
674 register Lisp_Object coordinates
, window
;
681 CHECK_LIVE_WINDOW (window
, 0);
682 w
= XWINDOW (window
);
683 f
= XFRAME (w
->frame
);
684 CHECK_CONS (coordinates
, 1);
685 lx
= Fcar (coordinates
);
686 ly
= Fcdr (coordinates
);
687 CHECK_NUMBER_OR_FLOAT (lx
, 1);
688 CHECK_NUMBER_OR_FLOAT (ly
, 1);
689 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
690 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
692 switch (coordinates_in_window (w
, &x
, &y
))
698 /* X and Y are now window relative pixel coordinates. Convert
699 them to canonical char units before returning them. */
700 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
701 CANON_Y_FROM_PIXEL_Y (f
, y
));
706 case ON_VERTICAL_BORDER
:
707 return Qvertical_line
;
715 case ON_RIGHT_FRINGE
:
716 return Qright_fringe
;
724 /* Callback for foreach_window, used in window_from_coordinates.
725 Check if window W contains coordinates specified by USER_DATA which
726 is actually a pointer to a struct check_window_data CW.
728 Check if window W contains coordinates *CW->x and *CW->y. If it
729 does, return W in *CW->window, as Lisp_Object, and return in
730 *CW->part the part of the window under coordinates *X,*Y. Return
731 zero from this function to stop iterating over windows. */
733 struct check_window_data
740 check_window_containing (w
, user_data
)
744 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
745 enum window_part found
;
748 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
749 if (found
!= ON_NOTHING
)
751 *cw
->part
= found
- 1;
752 XSETWINDOW (*cw
->window
, w
);
760 /* Find the window containing frame-relative pixel position X/Y and
761 return it as a Lisp_Object. If X, Y is on the window's modeline,
762 set *PART to 1; if it is on the separating line between the window
763 and its right sibling, set it to 2; otherwise set it to 0. If
764 there is no window under X, Y return nil and leave *PART
765 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
767 This function was previously implemented with a loop cycling over
768 windows with Fnext_window, and starting with the frame's selected
769 window. It turned out that this doesn't work with an
770 implementation of next_window using Vwindow_list, because
771 FRAME_SELECTED_WINDOW (F) is not always contained in the window
772 tree of F when this function is called asynchronously from
773 note_mouse_highlight. The original loop didn't terminate in this
777 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
784 struct check_window_data cw
;
787 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
788 foreach_window (f
, check_window_containing
, &cw
);
790 /* If not found above, see if it's in the tool bar window, if a tool
794 && WINDOWP (f
->tool_bar_window
)
795 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
796 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
800 window
= f
->tool_bar_window
;
806 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
807 doc
: /* Return window containing coordinates X and Y on FRAME.
808 If omitted, FRAME defaults to the currently selected frame.
809 The top left corner of the frame is considered to be row 0,
812 Lisp_Object x
, y
, frame
;
818 frame
= selected_frame
;
819 CHECK_LIVE_FRAME (frame
, 2);
822 /* Check that arguments are integers or floats. */
823 CHECK_NUMBER_OR_FLOAT (x
, 0);
824 CHECK_NUMBER_OR_FLOAT (y
, 1);
826 return window_from_coordinates (f
,
827 PIXEL_X_FROM_CANON_X (f
, x
),
828 PIXEL_Y_FROM_CANON_Y (f
, y
),
832 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
833 doc
: /* Return current value of point in WINDOW.
834 For a nonselected window, this is the value point would have
835 if that window were selected.
837 Note that, when WINDOW is the selected window and its buffer
838 is also currently selected, the value returned is the same as (point).
839 It would be more strictly correct to return the `top-level' value
840 of point, outside of any save-excursion forms.
841 But that is hard to define. */)
845 register struct window
*w
= decode_window (window
);
847 if (w
== XWINDOW (selected_window
)
848 && current_buffer
== XBUFFER (w
->buffer
))
850 return Fmarker_position (w
->pointm
);
853 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
854 doc
: /* Return position at which display currently starts in WINDOW.
855 This is updated by redisplay or by calling `set-window-start'. */)
859 return Fmarker_position (decode_window (window
)->start
);
862 /* This is text temporarily removed from the doc string below.
864 This function returns nil if the position is not currently known.
865 That happens when redisplay is preempted and doesn't finish.
866 If in that case you want to compute where the end of the window would
867 have been if redisplay had finished, do this:
869 (goto-char (window-start window))
870 (vertical-motion (1- (window-height window)) window)
873 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
874 doc
: /* Return position at which display currently ends in WINDOW.
875 This is updated by redisplay, when it runs to completion.
876 Simply changing the buffer text or setting `window-start'
877 does not update this value.
878 If UPDATE is non-nil, compute the up-to-date position
879 if it isn't already recorded. */)
881 Lisp_Object window
, update
;
884 struct window
*w
= decode_window (window
);
888 CHECK_BUFFER (buf
, 0);
890 #if 0 /* This change broke some things. We should make it later. */
891 /* If we don't know the end position, return nil.
892 The user can compute it with vertical-motion if he wants to.
893 It would be nicer to do it automatically,
894 but that's so slow that it would probably bother people. */
895 if (NILP (w
->window_end_valid
))
900 && ! (! NILP (w
->window_end_valid
)
901 && XFASTINT (w
->last_modified
) >= MODIFF
))
903 struct text_pos startp
;
905 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
907 /* In case W->start is out of the range, use something
908 reasonable. This situation occured when loading a file with
909 `-l' containing a call to `rmail' with subsequent other
910 commands. At the end, W->start happened to be BEG, while
911 rmail had already narrowed the buffer. */
912 if (XMARKER (w
->start
)->charpos
< BEGV
)
913 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
914 else if (XMARKER (w
->start
)->charpos
> ZV
)
915 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
917 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
919 /* Cannot use Fvertical_motion because that function doesn't
920 cope with variable-height lines. */
921 if (b
!= current_buffer
)
923 old_buffer
= current_buffer
;
924 set_buffer_internal (b
);
927 start_display (&it
, w
, startp
);
928 move_it_vertically (&it
, window_box_height (w
));
929 if (it
.current_y
< it
.last_visible_y
)
930 move_it_past_eol (&it
);
931 value
= make_number (IT_CHARPOS (it
));
934 set_buffer_internal (old_buffer
);
937 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
942 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
943 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer. */)
945 Lisp_Object window
, pos
;
947 register struct window
*w
= decode_window (window
);
949 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
950 if (w
== XWINDOW (selected_window
)
951 && XBUFFER (w
->buffer
) == current_buffer
)
954 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
956 /* We have to make sure that redisplay updates the window to show
957 the new value of point. */
958 if (!EQ (window
, selected_window
))
959 ++windows_or_buffers_changed
;
964 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
965 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
966 Optional third arg NOFORCE non-nil inhibits next redisplay
967 from overriding motion of point in order to display at this exact start. */)
968 (window
, pos
, noforce
)
969 Lisp_Object window
, pos
, noforce
;
971 register struct window
*w
= decode_window (window
);
973 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
974 set_marker_restricted (w
->start
, pos
, w
->buffer
);
975 /* this is not right, but much easier than doing what is right. */
976 w
->start_at_line_beg
= Qnil
;
979 w
->update_mode_line
= Qt
;
980 XSETFASTINT (w
->last_modified
, 0);
981 XSETFASTINT (w
->last_overlay_modified
, 0);
982 if (!EQ (window
, selected_window
))
983 windows_or_buffers_changed
++;
988 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
990 doc
: /* Return WINDOW's dedicated object, usually t or nil.
991 See also `set-window-dedicated-p'. */)
995 return decode_window (window
)->dedicated
;
998 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
999 Sset_window_dedicated_p
, 2, 2, 0,
1000 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1001 If it is dedicated, Emacs will not automatically change
1002 which buffer appears in it.
1003 The second argument is the new value for the dedication flag;
1004 non-nil means yes. */)
1006 Lisp_Object window
, arg
;
1008 register struct window
*w
= decode_window (window
);
1011 w
->dedicated
= Qnil
;
1015 return w
->dedicated
;
1018 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1020 doc
: /* Return the display-table that WINDOW is using. */)
1024 return decode_window (window
)->display_table
;
1027 /* Get the display table for use on window W. This is either W's
1028 display table or W's buffer's display table. Ignore the specified
1029 tables if they are not valid; if no valid table is specified,
1032 struct Lisp_Char_Table
*
1033 window_display_table (w
)
1036 struct Lisp_Char_Table
*dp
= NULL
;
1038 if (DISP_TABLE_P (w
->display_table
))
1039 dp
= XCHAR_TABLE (w
->display_table
);
1040 else if (BUFFERP (w
->buffer
))
1042 struct buffer
*b
= XBUFFER (w
->buffer
);
1044 if (DISP_TABLE_P (b
->display_table
))
1045 dp
= XCHAR_TABLE (b
->display_table
);
1046 else if (DISP_TABLE_P (Vstandard_display_table
))
1047 dp
= XCHAR_TABLE (Vstandard_display_table
);
1053 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1054 doc
: /* Set WINDOW's display-table to TABLE. */)
1056 register Lisp_Object window
, table
;
1058 register struct window
*w
;
1060 w
= decode_window (window
);
1061 w
->display_table
= table
;
1065 /* Record info on buffer window w is displaying
1066 when it is about to cease to display that buffer. */
1069 register struct window
*w
;
1076 if (b
!= XMARKER (w
->pointm
)->buffer
)
1080 if (w
== XWINDOW (selected_window
)
1081 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1082 /* Do this except when the selected window's buffer
1083 is being removed from some other window. */
1085 /* last_window_start records the start position that this buffer
1086 had in the last window to be disconnected from it.
1087 Now that this statement is unconditional,
1088 it is possible for the buffer to be displayed in the
1089 selected window, while last_window_start reflects another
1090 window which was recently showing the same buffer.
1091 Some people might say that might be a good thing. Let's see. */
1092 b
->last_window_start
= marker_position (w
->start
);
1094 /* Point in the selected window's buffer
1095 is actually stored in that buffer, and the window's pointm isn't used.
1096 So don't clobber point in that buffer. */
1097 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1098 /* This line helps to fix Horsley's testbug.el bug. */
1099 && !(WINDOWP (b
->last_selected_window
)
1100 && w
!= XWINDOW (b
->last_selected_window
)
1101 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1102 temp_set_point_both (b
,
1103 clip_to_bounds (BUF_BEGV (b
),
1104 XMARKER (w
->pointm
)->charpos
,
1106 clip_to_bounds (BUF_BEGV_BYTE (b
),
1107 marker_byte_position (w
->pointm
),
1110 if (WINDOWP (b
->last_selected_window
)
1111 && w
== XWINDOW (b
->last_selected_window
))
1112 b
->last_selected_window
= Qnil
;
1115 /* Put replacement into the window structure in place of old. */
1117 replace_window (old
, replacement
)
1118 Lisp_Object old
, replacement
;
1120 register Lisp_Object tem
;
1121 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1123 /* If OLD is its frame's root_window, then replacement is the new
1124 root_window for that frame. */
1126 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1127 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1131 p
->width
= o
->width
;
1132 p
->height
= o
->height
;
1133 p
->desired_matrix
= p
->current_matrix
= 0;
1135 bzero (&p
->cursor
, sizeof (p
->cursor
));
1136 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1137 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1138 p
->phys_cursor_type
= -1;
1139 p
->must_be_updated_p
= 0;
1140 p
->pseudo_window_p
= 0;
1141 XSETFASTINT (p
->window_end_vpos
, 0);
1142 XSETFASTINT (p
->window_end_pos
, 0);
1143 p
->window_end_valid
= Qnil
;
1144 p
->frozen_window_start_p
= 0;
1145 p
->orig_top
= p
->orig_height
= Qnil
;
1147 p
->next
= tem
= o
->next
;
1149 XWINDOW (tem
)->prev
= replacement
;
1151 p
->prev
= tem
= o
->prev
;
1153 XWINDOW (tem
)->next
= replacement
;
1155 p
->parent
= tem
= o
->parent
;
1158 if (EQ (XWINDOW (tem
)->vchild
, old
))
1159 XWINDOW (tem
)->vchild
= replacement
;
1160 if (EQ (XWINDOW (tem
)->hchild
, old
))
1161 XWINDOW (tem
)->hchild
= replacement
;
1164 /*** Here, if replacement is a vertical combination
1165 and so is its new parent, we should make replacement's
1166 children be children of that parent instead. ***/
1169 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1170 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1172 register Lisp_Object window
;
1174 delete_window (window
);
1176 if (! NILP (Vwindow_configuration_change_hook
)
1177 && ! NILP (Vrun_hooks
))
1178 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1184 delete_window (window
)
1185 register Lisp_Object window
;
1187 register Lisp_Object tem
, parent
, sib
;
1188 register struct window
*p
;
1189 register struct window
*par
;
1192 /* Because this function is called by other C code on non-leaf
1193 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1194 so we can't decode_window here. */
1196 window
= selected_window
;
1198 CHECK_WINDOW (window
, 0);
1199 p
= XWINDOW (window
);
1201 /* It's okay to delete an already-deleted window. */
1202 if (NILP (p
->buffer
)
1204 && NILP (p
->vchild
))
1209 error ("Attempt to delete minibuffer or sole ordinary window");
1210 par
= XWINDOW (parent
);
1212 windows_or_buffers_changed
++;
1213 Vwindow_list
= Qnil
;
1214 f
= XFRAME (WINDOW_FRAME (p
));
1215 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1217 /* Are we trying to delete any frame's selected window? */
1219 Lisp_Object pwindow
;
1221 /* See if the frame's selected window is either WINDOW
1222 or any subwindow of it, by finding all that window's parents
1223 and comparing each one with WINDOW. */
1224 pwindow
= FRAME_SELECTED_WINDOW (f
);
1226 while (!NILP (pwindow
))
1228 if (EQ (window
, pwindow
))
1230 pwindow
= XWINDOW (pwindow
)->parent
;
1233 if (EQ (window
, pwindow
))
1235 Lisp_Object alternative
;
1236 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1238 /* If we're about to delete the selected window on the
1239 selected frame, then we should use Fselect_window to select
1240 the new window. On the other hand, if we're about to
1241 delete the selected window on any other frame, we shouldn't do
1242 anything but set the frame's selected_window slot. */
1243 if (EQ (window
, selected_window
))
1244 Fselect_window (alternative
);
1246 FRAME_SELECTED_WINDOW (f
) = alternative
;
1251 /* tem is null for dummy parent windows
1252 (which have inferiors but not any contents themselves) */
1256 unchain_marker (p
->pointm
);
1257 unchain_marker (p
->start
);
1260 /* Free window glyph matrices. It is sure that they are allocated
1261 again when ADJUST_GLYPHS is called. Block input so that expose
1262 events and other events that access glyph matrices are not
1263 processed while we are changing them. */
1265 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1269 XWINDOW (tem
)->prev
= p
->prev
;
1273 XWINDOW (tem
)->next
= p
->next
;
1275 if (EQ (window
, par
->hchild
))
1276 par
->hchild
= p
->next
;
1277 if (EQ (window
, par
->vchild
))
1278 par
->vchild
= p
->next
;
1280 /* Find one of our siblings to give our space to. */
1284 /* If p gives its space to its next sibling, that sibling needs
1285 to have its top/left side pulled back to where p's is.
1286 set_window_{height,width} will re-position the sibling's
1289 XWINDOW (sib
)->top
= p
->top
;
1290 XWINDOW (sib
)->left
= p
->left
;
1293 /* Stretch that sibling. */
1294 if (!NILP (par
->vchild
))
1295 set_window_height (sib
,
1296 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1298 if (!NILP (par
->hchild
))
1299 set_window_width (sib
,
1300 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1303 /* If parent now has only one child,
1304 put the child into the parent's place. */
1308 if (NILP (XWINDOW (tem
)->next
))
1309 replace_window (parent
, tem
);
1311 /* Since we may be deleting combination windows, we must make sure that
1312 not only p but all its children have been marked as deleted. */
1313 if (! NILP (p
->hchild
))
1314 delete_all_subwindows (XWINDOW (p
->hchild
));
1315 else if (! NILP (p
->vchild
))
1316 delete_all_subwindows (XWINDOW (p
->vchild
));
1318 /* Mark this window as deleted. */
1319 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1321 /* Adjust glyph matrices. */
1328 /***********************************************************************
1330 ***********************************************************************/
1332 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1333 pointer. This is a callback function for foreach_window, used in
1334 function window_list. */
1337 add_window_to_list (w
, user_data
)
1341 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1343 XSETWINDOW (window
, w
);
1344 *list
= Fcons (window
, *list
);
1349 /* Return a list of all windows, for use by next_window. If
1350 Vwindow_list is a list, return that list. Otherwise, build a new
1351 list, cache it in Vwindow_list, and return that. */
1356 if (!CONSP (Vwindow_list
))
1360 Vwindow_list
= Qnil
;
1361 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1363 Lisp_Object args
[2];
1365 /* We are visiting windows in canonical order, and add
1366 new windows at the front of args[1], which means we
1367 have to reverse this list at the end. */
1369 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1370 args
[0] = Vwindow_list
;
1371 args
[1] = Fnreverse (args
[1]);
1372 Vwindow_list
= Fnconc (2, args
);
1376 return Vwindow_list
;
1380 /* Value is non-zero if WINDOW satisfies the constraints given by
1381 OWINDOW, MINIBUF and ALL_FRAMES.
1383 MINIBUF t means WINDOW may be minibuffer windows.
1384 `lambda' means WINDOW may not be a minibuffer window.
1385 a window means a specific minibuffer window
1387 ALL_FRAMES t means search all frames,
1388 nil means search just current frame,
1389 `visible' means search just visible frames,
1390 0 means search visible and iconified frames,
1391 a window means search the frame that window belongs to,
1392 a frame means consider windows on that frame, only. */
1395 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1396 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1398 struct window
*w
= XWINDOW (window
);
1399 struct frame
*f
= XFRAME (w
->frame
);
1400 int candidate_p
= 1;
1402 if (!BUFFERP (w
->buffer
))
1404 else if (MINI_WINDOW_P (w
)
1405 && (EQ (minibuf
, Qlambda
)
1406 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1408 /* If MINIBUF is `lambda' don't consider any mini-windows.
1409 If it is a window, consider only that one. */
1412 else if (EQ (all_frames
, Qt
))
1414 else if (NILP (all_frames
))
1416 xassert (WINDOWP (owindow
));
1417 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1419 else if (EQ (all_frames
, Qvisible
))
1421 FRAME_SAMPLE_VISIBILITY (f
);
1422 candidate_p
= FRAME_VISIBLE_P (f
);
1424 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1426 FRAME_SAMPLE_VISIBILITY (f
);
1427 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1429 else if (WINDOWP (all_frames
))
1430 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1431 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1432 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1433 else if (FRAMEP (all_frames
))
1434 candidate_p
= EQ (all_frames
, w
->frame
);
1440 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1441 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1445 decode_next_window_args (window
, minibuf
, all_frames
)
1446 Lisp_Object
*window
, *minibuf
, *all_frames
;
1449 *window
= selected_window
;
1451 CHECK_LIVE_WINDOW (*window
, 0);
1453 /* MINIBUF nil may or may not include minibuffers. Decide if it
1455 if (NILP (*minibuf
))
1456 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1457 else if (!EQ (*minibuf
, Qt
))
1460 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1461 => count none of them, or a specific minibuffer window (the
1462 active one) to count. */
1464 /* ALL_FRAMES nil doesn't specify which frames to include. */
1465 if (NILP (*all_frames
))
1466 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1467 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1469 else if (EQ (*all_frames
, Qvisible
))
1471 else if (XFASTINT (*all_frames
) == 0)
1473 else if (FRAMEP (*all_frames
))
1475 else if (!EQ (*all_frames
, Qt
))
1478 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1479 search just current frame, `visible' meaning search just visible
1480 frames, 0 meaning search visible and iconified frames, or a
1481 window, meaning search the frame that window belongs to, or a
1482 frame, meaning consider windows on that frame, only. */
1486 /* Return the next or previous window of WINDOW in canonical ordering
1487 of windows. NEXT_P non-zero means return the next window. See the
1488 documentation string of next-window for the meaning of MINIBUF and
1492 next_window (window
, minibuf
, all_frames
, next_p
)
1493 Lisp_Object window
, minibuf
, all_frames
;
1496 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1498 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1499 return the first window on the frame. */
1500 if (FRAMEP (all_frames
)
1501 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1502 return Fframe_first_window (all_frames
);
1508 /* Find WINDOW in the list of all windows. */
1509 list
= Fmemq (window
, window_list ());
1511 /* Scan forward from WINDOW to the end of the window list. */
1513 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1514 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1517 /* Scan from the start of the window list up to WINDOW. */
1519 for (list
= Vwindow_list
;
1520 CONSP (list
) && !EQ (XCAR (list
), window
);
1522 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1526 window
= XCAR (list
);
1530 Lisp_Object candidate
, list
;
1532 /* Scan through the list of windows for candidates. If there are
1533 candidate windows in front of WINDOW, the last one of these
1534 is the one we want. If there are candidates following WINDOW
1535 in the list, again the last one of these is the one we want. */
1537 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1539 if (EQ (XCAR (list
), window
))
1541 if (WINDOWP (candidate
))
1544 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1546 candidate
= XCAR (list
);
1549 if (WINDOWP (candidate
))
1557 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1558 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1559 If omitted, WINDOW defaults to the selected window.
1561 Optional second arg MINIBUF t means count the minibuffer window even
1562 if not active. MINIBUF nil or omitted means count the minibuffer iff
1563 it is active. MINIBUF neither t nor nil means not to count the
1564 minibuffer even if it is active.
1566 Several frames may share a single minibuffer; if the minibuffer
1567 counts, all windows on all frames that share that minibuffer count
1568 too. Therefore, `next-window' can be used to iterate through the
1569 set of windows even when the minibuffer is on another frame. If the
1570 minibuffer does not count, only windows from WINDOW's frame count.
1572 Optional third arg ALL-FRAMES t means include windows on all frames.
1573 ALL-FRAMES nil or omitted means cycle within the frames as specified
1574 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1575 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1576 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1577 Anything else means restrict to WINDOW's frame.
1579 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1580 `next-window' to iterate through the entire cycle of acceptable
1581 windows, eventually ending up back at the window you started with.
1582 `previous-window' traverses the same cycle, in the reverse order. */)
1583 (window
, minibuf
, all_frames
)
1584 Lisp_Object window
, minibuf
, all_frames
;
1586 return next_window (window
, minibuf
, all_frames
, 1);
1590 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1591 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1592 If omitted, WINDOW defaults to the selected window.
1594 Optional second arg MINIBUF t means count the minibuffer window even
1595 if not active. MINIBUF nil or omitted means count the minibuffer iff
1596 it is active. MINIBUF neither t nor nil means not to count the
1597 minibuffer even if it is active.
1599 Several frames may share a single minibuffer; if the minibuffer
1600 counts, all windows on all frames that share that minibuffer count
1601 too. Therefore, `previous-window' can be used to iterate through
1602 the set of windows even when the minibuffer is on another frame. If
1603 the minibuffer does not count, only windows from WINDOW's frame count
1605 Optional third arg ALL-FRAMES t means include windows on all frames.
1606 ALL-FRAMES nil or omitted means cycle within the frames as specified
1607 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1608 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1609 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1610 Anything else means restrict to WINDOW's frame.
1612 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1613 `previous-window' to iterate through the entire cycle of acceptable
1614 windows, eventually ending up back at the window you started with.
1615 `next-window' traverses the same cycle, in the reverse order. */)
1616 (window
, minibuf
, all_frames
)
1617 Lisp_Object window
, minibuf
, all_frames
;
1619 return next_window (window
, minibuf
, all_frames
, 0);
1623 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1624 doc
: /* Select the ARG'th different window on this frame.
1625 All windows on current frame are arranged in a cyclic order.
1626 This command selects the window ARG steps away in that order.
1627 A negative ARG moves in the opposite order. If the optional second
1628 argument ALL_FRAMES is non-nil, cycle through all frames. */)
1630 Lisp_Object arg
, all_frames
;
1635 CHECK_NUMBER (arg
, 0);
1636 window
= selected_window
;
1638 for (i
= XINT (arg
); i
> 0; --i
)
1639 window
= Fnext_window (window
, Qnil
, all_frames
);
1641 window
= Fprevious_window (window
, Qnil
, all_frames
);
1643 Fselect_window (window
);
1648 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1649 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
1650 FRAME nil or omitted means use the selected frame.
1651 WINDOW nil or omitted means use the selected window.
1652 MINIBUF t means include the minibuffer window, even if it isn't active.
1653 MINIBUF nil or omitted means include the minibuffer window only
1655 MINIBUF neither nil nor t means never include the minibuffer window. */)
1656 (frame
, minibuf
, window
)
1657 Lisp_Object frame
, minibuf
, window
;
1660 window
= selected_window
;
1662 frame
= selected_frame
;
1664 if (!EQ (frame
, XWINDOW (window
)->frame
))
1665 error ("Window is on a different frame");
1667 return window_list_1 (window
, minibuf
, frame
);
1671 /* Return a list of windows in canonical ordering. Arguments are like
1672 for `next-window'. */
1675 window_list_1 (window
, minibuf
, all_frames
)
1676 Lisp_Object window
, minibuf
, all_frames
;
1678 Lisp_Object tail
, list
;
1680 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1683 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1684 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1685 list
= Fcons (XCAR (tail
), list
);
1687 return Fnreverse (list
);
1692 /* Look at all windows, performing an operation specified by TYPE
1694 If FRAMES is Qt, look at all frames;
1695 Qnil, look at just the selected frame;
1696 Qvisible, look at visible frames;
1697 a frame, just look at windows on that frame.
1698 If MINI is non-zero, perform the operation on minibuffer windows too. */
1703 GET_BUFFER_WINDOW
, /* Arg is buffer */
1704 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1705 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1706 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1708 UNSHOW_BUFFER
, /* Arg is buffer */
1713 window_loop (type
, obj
, mini
, frames
)
1714 enum window_loop type
;
1715 Lisp_Object obj
, frames
;
1718 Lisp_Object window
, windows
, best_window
, frame_arg
;
1720 struct gcpro gcpro1
;
1722 /* If we're only looping through windows on a particular frame,
1723 frame points to that frame. If we're looping through windows
1724 on all frames, frame is 0. */
1725 if (FRAMEP (frames
))
1726 f
= XFRAME (frames
);
1727 else if (NILP (frames
))
1728 f
= SELECTED_FRAME ();
1733 frame_arg
= Qlambda
;
1734 else if (XFASTINT (frames
) == 0)
1736 else if (EQ (frames
, Qvisible
))
1741 /* frame_arg is Qlambda to stick to one frame,
1742 Qvisible to consider all visible frames,
1745 /* Pick a window to start with. */
1749 window
= FRAME_SELECTED_WINDOW (f
);
1751 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1753 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1757 for (; CONSP (windows
); windows
= CDR (windows
))
1761 window
= XCAR (windows
);
1762 w
= XWINDOW (window
);
1764 /* Note that we do not pay attention here to whether the frame
1765 is visible, since Fwindow_list skips non-visible frames if
1766 that is desired, under the control of frame_arg. */
1767 if (!MINI_WINDOW_P (w
)
1768 /* For UNSHOW_BUFFER, we must always consider all windows. */
1769 || type
== UNSHOW_BUFFER
1770 || (mini
&& minibuf_level
> 0))
1773 case GET_BUFFER_WINDOW
:
1774 if (EQ (w
->buffer
, obj
)
1775 /* Don't find any minibuffer window
1776 except the one that is currently in use. */
1777 && (MINI_WINDOW_P (w
)
1778 ? EQ (window
, minibuf_window
)
1781 if (NILP (best_window
))
1782 best_window
= window
;
1783 else if (EQ (window
, selected_window
))
1784 /* For compatibility with 20.x, prefer to return
1786 best_window
= window
;
1790 case GET_LRU_WINDOW
:
1791 /* t as arg means consider only full-width windows */
1792 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1794 /* Ignore dedicated windows and minibuffers. */
1795 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1797 if (NILP (best_window
)
1798 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1799 > XFASTINT (w
->use_time
)))
1800 best_window
= window
;
1803 case DELETE_OTHER_WINDOWS
:
1804 if (!EQ (window
, obj
))
1805 Fdelete_window (window
);
1808 case DELETE_BUFFER_WINDOWS
:
1809 if (EQ (w
->buffer
, obj
))
1811 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1813 /* If this window is dedicated, and in a frame of its own,
1815 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1816 && !NILP (w
->dedicated
)
1817 && other_visible_frames (f
))
1819 /* Skip the other windows on this frame.
1820 There might be one, the minibuffer! */
1821 while (CONSP (XCDR (windows
))
1822 && EQ (XWINDOW (XCAR (windows
))->frame
,
1823 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1824 windows
= XCDR (windows
);
1826 /* Now we can safely delete the frame. */
1827 Fdelete_frame (w
->frame
, Qnil
);
1829 else if (NILP (w
->parent
))
1831 /* If we're deleting the buffer displayed in the
1832 only window on the frame, find a new buffer to
1835 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1836 Fset_window_buffer (window
, buffer
);
1837 if (EQ (window
, selected_window
))
1838 Fset_buffer (w
->buffer
);
1841 Fdelete_window (window
);
1845 case GET_LARGEST_WINDOW
:
1847 /* Ignore dedicated windows and minibuffers. */
1848 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1851 if (NILP (best_window
))
1852 best_window
= window
;
1855 struct window
*b
= XWINDOW (best_window
);
1856 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1857 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1858 best_window
= window
;
1864 if (EQ (w
->buffer
, obj
))
1867 struct frame
*f
= XFRAME (w
->frame
);
1869 /* Find another buffer to show in this window. */
1870 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1872 /* If this window is dedicated, and in a frame of its own,
1874 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1875 && !NILP (w
->dedicated
)
1876 && other_visible_frames (f
))
1878 /* Skip the other windows on this frame.
1879 There might be one, the minibuffer! */
1880 while (CONSP (XCDR (windows
))
1881 && EQ (XWINDOW (XCAR (windows
))->frame
,
1882 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1883 windows
= XCDR (windows
);
1885 /* Now we can safely delete the frame. */
1886 Fdelete_frame (w
->frame
, Qnil
);
1890 /* Otherwise show a different buffer in the window. */
1891 w
->dedicated
= Qnil
;
1892 Fset_window_buffer (window
, buffer
);
1893 if (EQ (window
, selected_window
))
1894 Fset_buffer (w
->buffer
);
1899 /* Check for a window that has a killed buffer. */
1900 case CHECK_ALL_WINDOWS
:
1901 if (! NILP (w
->buffer
)
1902 && NILP (XBUFFER (w
->buffer
)->name
))
1906 case WINDOW_LOOP_UNUSED
:
1915 /* Used for debugging. Abort if any window has a dead buffer. */
1918 check_all_windows ()
1920 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1923 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1924 doc
: /* Return the window least recently selected or used for display.
1925 If optional argument FRAME is `visible', search all visible frames.
1926 If FRAME is 0, search all visible and iconified frames.
1927 If FRAME is t, search all frames.
1928 If FRAME is nil, search only the selected frame.
1929 If FRAME is a frame, search only that frame. */)
1933 register Lisp_Object w
;
1934 /* First try for a window that is full-width */
1935 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1936 if (!NILP (w
) && !EQ (w
, selected_window
))
1938 /* If none of them, try the rest */
1939 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1942 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1943 doc
: /* Return the largest window in area.
1944 If optional argument FRAME is `visible', search all visible frames.
1945 If FRAME is 0, search all visible and iconified frames.
1946 If FRAME is t, search all frames.
1947 If FRAME is nil, search only the selected frame.
1948 If FRAME is a frame, search only that frame. */)
1952 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1956 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1957 doc
: /* Return a window currently displaying BUFFER, or nil if none.
1958 If optional argument FRAME is `visible', search all visible frames.
1959 If optional argument FRAME is 0, search all visible and iconified frames.
1960 If FRAME is t, search all frames.
1961 If FRAME is nil, search only the selected frame.
1962 If FRAME is a frame, search only that frame. */)
1964 Lisp_Object buffer
, frame
;
1966 buffer
= Fget_buffer (buffer
);
1967 if (BUFFERP (buffer
))
1968 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1973 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1975 doc
: /* Make WINDOW (or the selected window) fill its frame.
1976 Only the frame WINDOW is on is affected.
1977 This function tries to reduce display jumps
1978 by keeping the text previously visible in WINDOW
1979 in the same place on the frame. Doing this depends on
1980 the value of (window-start WINDOW), so if calling this function
1981 in a program gives strange scrolling, make sure the window-start
1982 value is reasonable when this function is called. */)
1991 window
= selected_window
;
1993 CHECK_LIVE_WINDOW (window
, 0);
1994 w
= XWINDOW (window
);
1996 startpos
= marker_position (w
->start
);
1997 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
1999 if (MINI_WINDOW_P (w
) && top
> 0)
2000 error ("Can't expand minibuffer to full frame");
2002 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2004 /* Try to minimize scrolling, by setting the window start to the point
2005 will cause the text at the old window start to be at the same place
2006 on the frame. But don't try to do this if the window start is
2007 outside the visible portion (as might happen when the display is
2008 not current, due to typeahead). */
2009 new_top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2011 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2012 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2014 struct position pos
;
2015 struct buffer
*obuf
= current_buffer
;
2017 Fset_buffer (w
->buffer
);
2018 /* This computation used to temporarily move point, but that can
2019 have unwanted side effects due to text properties. */
2020 pos
= *vmotion (startpos
, -top
, w
);
2022 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2023 w
->window_end_valid
= Qnil
;
2024 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2025 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2027 /* We need to do this, so that the window-scroll-functions
2029 w
->optional_new_start
= Qt
;
2031 set_buffer_internal (obuf
);
2037 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2038 1, 2, "bDelete windows on (buffer): ",
2039 doc
: /* Delete all windows showing BUFFER.
2040 Optional second argument FRAME controls which frames are affected.
2041 If optional argument FRAME is `visible', search all visible frames.
2042 If FRAME is 0, search all visible and iconified frames.
2043 If FRAME is nil, search all frames.
2044 If FRAME is t, search only the selected frame.
2045 If FRAME is a frame, search only that frame. */)
2047 Lisp_Object buffer
, frame
;
2049 /* FRAME uses t and nil to mean the opposite of what window_loop
2053 else if (EQ (frame
, Qt
))
2058 buffer
= Fget_buffer (buffer
);
2059 CHECK_BUFFER (buffer
, 0);
2060 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2066 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2067 Sreplace_buffer_in_windows
,
2068 1, 1, "bReplace buffer in windows: ",
2069 doc
: /* Replace BUFFER with some other buffer in all windows showing it. */)
2075 buffer
= Fget_buffer (buffer
);
2076 CHECK_BUFFER (buffer
, 0);
2077 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2082 /* Replace BUFFER with some other buffer in all windows
2083 of all frames, even those on other keyboards. */
2086 replace_buffer_in_all_windows (buffer
)
2090 Lisp_Object tail
, frame
;
2092 /* A single call to window_loop won't do the job
2093 because it only considers frames on the current keyboard.
2094 So loop manually over frames, and handle each one. */
2095 FOR_EACH_FRAME (tail
, frame
)
2096 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2098 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2102 /* Set the height of WINDOW and all its inferiors. */
2104 /* The smallest acceptable dimensions for a window. Anything smaller
2105 might crash Emacs. */
2107 #define MIN_SAFE_WINDOW_WIDTH (2)
2108 #define MIN_SAFE_WINDOW_HEIGHT (2)
2110 /* Make sure that window_min_height and window_min_width are
2111 not too small; if they are, set them to safe minima. */
2114 check_min_window_sizes ()
2116 /* Smaller values might permit a crash. */
2117 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2118 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2119 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2120 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2123 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2124 minimum allowable size. */
2127 check_frame_size (frame
, rows
, cols
)
2131 /* For height, we have to see:
2132 whether the frame has a minibuffer,
2133 whether it wants a mode line, and
2134 whether it has a menu bar. */
2136 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2137 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2138 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2140 if (FRAME_TOP_MARGIN (frame
) > 0)
2141 min_height
+= FRAME_TOP_MARGIN (frame
);
2143 if (*rows
< min_height
)
2145 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2146 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2150 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2151 check if W's width can be changed, otherwise check W's height.
2152 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2153 siblings, too. If none of the siblings is resizable, WINDOW isn't
2157 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2159 int width_p
, check_siblings_p
;
2164 if (!NILP (w
->hchild
))
2166 c
= XWINDOW (w
->hchild
);
2170 /* A horiz. combination is fixed-width if all of if its
2172 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2173 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2174 fixed_p
= c
== NULL
;
2178 /* A horiz. combination is fixed-height if one of if its
2180 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2181 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2182 fixed_p
= c
!= NULL
;
2185 else if (!NILP (w
->vchild
))
2187 c
= XWINDOW (w
->vchild
);
2191 /* A vert. combination is fixed-width if one of if its
2193 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2194 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2195 fixed_p
= c
!= NULL
;
2199 /* A vert. combination is fixed-height if all of if its
2201 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2202 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2203 fixed_p
= c
== NULL
;
2206 else if (BUFFERP (w
->buffer
))
2208 if (w
->height_fixed_p
&& !width_p
)
2212 struct buffer
*old
= current_buffer
;
2215 current_buffer
= XBUFFER (w
->buffer
);
2216 val
= find_symbol_value (Qwindow_size_fixed
);
2217 current_buffer
= old
;
2220 if (!EQ (val
, Qunbound
))
2222 fixed_p
= !NILP (val
);
2225 && ((EQ (val
, Qheight
) && width_p
)
2226 || (EQ (val
, Qwidth
) && !width_p
)))
2231 /* Can't tell if this one is resizable without looking at
2232 siblings. If all siblings are fixed-size this one is too. */
2233 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2237 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2238 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2242 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2243 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2257 /* Return the minimum size of window W, not taking fixed-width windows
2258 into account. WIDTH_P non-zero means return the minimum width,
2259 otherwise return the minimum height. If W is a combination window,
2260 compute the minimum size from the minimum sizes of W's children. */
2263 window_min_size_1 (w
, width_p
)
2270 if (!NILP (w
->hchild
))
2272 c
= XWINDOW (w
->hchild
);
2277 /* The min width of a horizontal combination is
2278 the sum of the min widths of its children. */
2281 size
+= window_min_size_1 (c
, width_p
);
2282 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2287 /* The min height a horizontal combination equals
2288 the maximum of all min height of its children. */
2291 int min_size
= window_min_size_1 (c
, width_p
);
2292 size
= max (min_size
, size
);
2293 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2297 else if (!NILP (w
->vchild
))
2299 c
= XWINDOW (w
->vchild
);
2304 /* The min width of a vertical combination is
2305 the maximum of the min widths of its children. */
2308 int min_size
= window_min_size_1 (c
, width_p
);
2309 size
= max (min_size
, size
);
2310 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2315 /* The min height of a vertical combination equals
2316 the sum of the min height of its children. */
2319 size
+= window_min_size_1 (c
, width_p
);
2320 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2327 size
= window_min_width
;
2330 if (MINI_WINDOW_P (w
)
2331 || (!WINDOW_WANTS_MODELINE_P (w
)
2332 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2335 size
= window_min_height
;
2343 /* Return the minimum size of window W, taking fixed-size windows into
2344 account. WIDTH_P non-zero means return the minimum width,
2345 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2346 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2347 unless FIXED is null. */
2350 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2352 int width_p
, ignore_fixed_p
, *fixed
;
2359 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2365 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2367 size
= window_min_size_1 (w
, width_p
);
2373 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2374 WINDOW's width. Resize WINDOW's children, if any, so that they
2375 keep their proportionate size relative to WINDOW. Propagate
2376 WINDOW's top or left edge position to children. Delete windows
2377 that become too small unless NODELETE_P is non-zero. */
2380 size_window (window
, size
, width_p
, nodelete_p
)
2382 int size
, width_p
, nodelete_p
;
2384 struct window
*w
= XWINDOW (window
);
2386 Lisp_Object child
, *forward
, *sideward
;
2387 int old_size
, min_size
;
2389 check_min_window_sizes ();
2390 size
= max (0, size
);
2392 /* If the window has been "too small" at one point,
2393 don't delete it for being "too small" in the future.
2394 Preserve it as long as that is at all possible. */
2397 old_size
= XINT (w
->width
);
2398 min_size
= window_min_width
;
2402 old_size
= XINT (w
->height
);
2403 min_size
= window_min_height
;
2406 if (old_size
< min_size
)
2407 w
->too_small_ok
= Qt
;
2409 /* Maybe delete WINDOW if it's too small. */
2410 if (!nodelete_p
&& !NILP (w
->parent
))
2412 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2413 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2415 min_size
= width_p
? window_min_width
: window_min_height
;
2417 if (size
< min_size
)
2419 delete_window (window
);
2424 /* Set redisplay hints. */
2425 w
->last_modified
= make_number (0);
2426 w
->last_overlay_modified
= make_number (0);
2427 windows_or_buffers_changed
++;
2428 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2432 sideward
= &w
->vchild
;
2433 forward
= &w
->hchild
;
2434 w
->width
= make_number (size
);
2438 sideward
= &w
->hchild
;
2439 forward
= &w
->vchild
;
2440 w
->height
= make_number (size
);
2441 w
->orig_height
= Qnil
;
2444 if (!NILP (*sideward
))
2446 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2448 c
= XWINDOW (child
);
2453 size_window (child
, size
, width_p
, nodelete_p
);
2456 else if (!NILP (*forward
))
2458 int fixed_size
, each
, extra
, n
;
2459 int resize_fixed_p
, nfixed
;
2460 int last_pos
, first_pos
, nchildren
, total
;
2462 /* Determine the fixed-size portion of the this window, and the
2463 number of child windows. */
2464 fixed_size
= nchildren
= nfixed
= total
= 0;
2465 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2469 c
= XWINDOW (child
);
2470 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2471 total
+= child_size
;
2473 if (window_fixed_size_p (c
, width_p
, 0))
2475 fixed_size
+= child_size
;
2480 /* If the new size is smaller than fixed_size, or if there
2481 aren't any resizable windows, allow resizing fixed-size
2483 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2485 /* Compute how many lines/columns to add to each child. The
2486 value of extra takes care of rounding errors. */
2487 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2488 each
= (size
- total
) / n
;
2489 extra
= (size
- total
) - n
* each
;
2491 /* Compute new children heights and edge positions. */
2492 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2493 last_pos
= first_pos
;
2494 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2496 int new_size
, old_size
;
2498 c
= XWINDOW (child
);
2499 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2500 new_size
= old_size
;
2502 /* The top or left edge position of this child equals the
2503 bottom or right edge of its predecessor. */
2505 c
->left
= make_number (last_pos
);
2507 c
->top
= make_number (last_pos
);
2509 /* If this child can be resized, do it. */
2510 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2512 new_size
= old_size
+ each
+ extra
;
2516 /* Set new height. Note that size_window also propagates
2517 edge positions to children, so it's not a no-op if we
2518 didn't change the child's size. */
2519 size_window (child
, new_size
, width_p
, 1);
2521 /* Remember the bottom/right edge position of this child; it
2522 will be used to set the top/left edge of the next child. */
2523 last_pos
+= new_size
;
2526 /* We should have covered the parent exactly with child windows. */
2527 xassert (size
== last_pos
- first_pos
);
2529 /* Now delete any children that became too small. */
2531 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2534 c
= XWINDOW (child
);
2535 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2536 size_window (child
, child_size
, width_p
, 0);
2541 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2542 WINDOW's children. NODELETE non-zero means don't delete windows
2543 that become too small in the process. (The caller should check
2544 later and do so if appropriate.) */
2547 set_window_height (window
, height
, nodelete
)
2552 size_window (window
, height
, 0, nodelete
);
2556 /* Set WINDOW's width to WIDTH, and recursively change the width of
2557 WINDOW's children. NODELETE non-zero means don't delete windows
2558 that become too small in the process. (The caller should check
2559 later and do so if appropriate.) */
2562 set_window_width (window
, width
, nodelete
)
2567 size_window (window
, width
, 1, nodelete
);
2571 int window_select_count
;
2574 Fset_window_buffer_unwind (obuf
)
2582 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2583 means it's allowed to run hooks. See make_frame for a case where
2584 it's not allowed. */
2587 set_window_buffer (window
, buffer
, run_hooks_p
)
2588 Lisp_Object window
, buffer
;
2591 struct window
*w
= XWINDOW (window
);
2592 struct buffer
*b
= XBUFFER (buffer
);
2593 int count
= specpdl_ptr
- specpdl
;
2597 if (EQ (window
, selected_window
))
2598 b
->last_selected_window
= window
;
2600 /* Update time stamps of buffer display. */
2601 if (INTEGERP (b
->display_count
))
2602 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2603 b
->display_time
= Fcurrent_time ();
2605 XSETFASTINT (w
->window_end_pos
, 0);
2606 XSETFASTINT (w
->window_end_vpos
, 0);
2607 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2608 w
->window_end_valid
= Qnil
;
2609 w
->hscroll
= w
->min_hscroll
= make_number (0);
2611 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2612 set_marker_restricted (w
->start
,
2613 make_number (b
->last_window_start
),
2615 w
->start_at_line_beg
= Qnil
;
2616 w
->force_start
= Qnil
;
2617 XSETFASTINT (w
->last_modified
, 0);
2618 XSETFASTINT (w
->last_overlay_modified
, 0);
2619 windows_or_buffers_changed
++;
2621 /* We must select BUFFER for running the window-scroll-functions.
2622 If WINDOW is selected, switch permanently.
2623 Otherwise, switch but go back to the ambient buffer afterward. */
2624 if (EQ (window
, selected_window
))
2625 Fset_buffer (buffer
);
2626 /* We can't check ! NILP (Vwindow_scroll_functions) here
2627 because that might itself be a local variable. */
2628 else if (window_initialized
)
2630 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2631 Fset_buffer (buffer
);
2634 /* Set left and right marginal area width from buffer. */
2635 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2639 if (! NILP (Vwindow_scroll_functions
))
2640 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2641 Fmarker_position (w
->start
));
2643 if (! NILP (Vwindow_configuration_change_hook
)
2644 && ! NILP (Vrun_hooks
))
2645 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2648 unbind_to (count
, Qnil
);
2652 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2653 doc
: /* Make WINDOW display BUFFER as its contents.
2654 BUFFER can be a buffer or buffer name. */)
2656 register Lisp_Object window
, buffer
;
2658 register Lisp_Object tem
;
2659 register struct window
*w
= decode_window (window
);
2661 XSETWINDOW (window
, w
);
2662 buffer
= Fget_buffer (buffer
);
2663 CHECK_BUFFER (buffer
, 1);
2665 if (NILP (XBUFFER (buffer
)->name
))
2666 error ("Attempt to display deleted buffer");
2670 error ("Window is deleted");
2671 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2672 is first being set up. */
2674 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2675 error ("Window is dedicated to `%s'",
2676 XSTRING (XBUFFER (tem
)->name
)->data
);
2681 set_window_buffer (window
, buffer
, 1);
2685 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2686 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
2687 If WINDOW is not already selected, also make WINDOW's buffer current.
2688 Note that the main editor command loop
2689 selects the buffer of the selected window before each command. */)
2691 register Lisp_Object window
;
2693 return select_window_1 (window
, 1);
2696 /* Note that selected_window can be nil
2697 when this is called from Fset_window_configuration. */
2700 select_window_1 (window
, recordflag
)
2701 register Lisp_Object window
;
2704 register struct window
*w
;
2705 register struct window
*ow
;
2708 CHECK_LIVE_WINDOW (window
, 0);
2710 w
= XWINDOW (window
);
2711 w
->frozen_window_start_p
= 0;
2713 XSETFASTINT (w
->use_time
, ++window_select_count
);
2714 if (EQ (window
, selected_window
))
2717 if (!NILP (selected_window
))
2719 ow
= XWINDOW (selected_window
);
2720 if (! NILP (ow
->buffer
))
2721 set_marker_both (ow
->pointm
, ow
->buffer
,
2722 BUF_PT (XBUFFER (ow
->buffer
)),
2723 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2726 selected_window
= window
;
2727 sf
= SELECTED_FRAME ();
2728 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2730 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2731 /* Use this rather than Fhandle_switch_frame
2732 so that FRAME_FOCUS_FRAME is moved appropriately as we
2733 move around in the state where a minibuffer in a separate
2735 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2738 sf
->selected_window
= window
;
2741 record_buffer (w
->buffer
);
2742 Fset_buffer (w
->buffer
);
2744 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2746 /* Go to the point recorded in the window.
2747 This is important when the buffer is in more
2748 than one window. It also matters when
2749 redisplay_window has altered point after scrolling,
2750 because it makes the change only in the window. */
2752 register int new_point
= marker_position (w
->pointm
);
2753 if (new_point
< BEGV
)
2755 else if (new_point
> ZV
)
2761 windows_or_buffers_changed
++;
2765 /* Deiconify the frame containing the window WINDOW,
2766 unless it is the selected frame;
2769 The reason for the exception for the selected frame
2770 is that it seems better not to change the selected frames visibility
2771 merely because of displaying a different buffer in it.
2772 The deiconification is useful when a buffer gets shown in
2773 another frame that you were not using lately. */
2776 display_buffer_1 (window
)
2779 Lisp_Object frame
= XWINDOW (window
)->frame
;
2780 FRAME_PTR f
= XFRAME (frame
);
2782 FRAME_SAMPLE_VISIBILITY (f
);
2784 if (!EQ (frame
, selected_frame
))
2786 if (FRAME_ICONIFIED_P (f
))
2787 Fmake_frame_visible (frame
);
2788 else if (FRAME_VISIBLE_P (f
))
2789 Fraise_frame (frame
);
2795 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2796 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would be created specially.
2797 The value is actually t if the frame should be called with default frame
2798 parameters, and a list of frame parameters if they were specified.
2799 See `special-display-buffer-names', and `special-display-regexps'. */)
2801 Lisp_Object buffer_name
;
2805 CHECK_STRING (buffer_name
, 1);
2807 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2811 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2815 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2817 Lisp_Object car
= XCAR (tem
);
2819 && fast_string_match (car
, buffer_name
) >= 0)
2821 else if (CONSP (car
)
2822 && STRINGP (XCAR (car
))
2823 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2829 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2830 doc
: /* Returns non-nil if a new buffer named BUFFER-NAME would use the same window.
2831 See `same-window-buffer-names' and `same-window-regexps'. */)
2833 Lisp_Object buffer_name
;
2837 CHECK_STRING (buffer_name
, 1);
2839 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2843 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2847 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2849 Lisp_Object car
= XCAR (tem
);
2851 && fast_string_match (car
, buffer_name
) >= 0)
2853 else if (CONSP (car
)
2854 && STRINGP (XCAR (car
))
2855 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2861 /* Use B so the default is (other-buffer). */
2862 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2863 "BDisplay buffer: \nP",
2864 doc
: /* Make BUFFER appear in some window but don't select it.
2865 BUFFER can be a buffer or a buffer name.
2866 If BUFFER is shown already in some window, just use that one,
2867 unless the window is the selected window and the optional second
2868 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
2869 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
2870 Returns the window displaying BUFFER.
2871 If `display-reuse-frames' is non-nil, and another frame is currently
2872 displaying BUFFER, then simply raise that frame.
2874 The variables `special-display-buffer-names', `special-display-regexps',
2875 `same-window-buffer-names', and `same-window-regexps' customize how certain
2876 buffer names are handled.
2878 If optional argument FRAME is `visible', search all visible frames.
2879 If FRAME is 0, search all visible and iconified frames.
2880 If FRAME is t, search all frames.
2881 If FRAME is a frame, search only that frame.
2882 If FRAME is nil, search only the selected frame
2883 (actually the last nonminibuffer frame),
2884 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
2885 which means search visible and iconified frames.
2887 If `even-window-heights' is non-nil, window heights will be evened out
2888 if displaying the buffer causes two vertically adjacent windows to be
2890 (buffer
, not_this_window
, frame
)
2891 register Lisp_Object buffer
, not_this_window
, frame
;
2893 register Lisp_Object window
, tem
, swp
;
2897 buffer
= Fget_buffer (buffer
);
2898 CHECK_BUFFER (buffer
, 0);
2900 if (!NILP (Vdisplay_buffer_function
))
2901 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2903 if (NILP (not_this_window
)
2904 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2905 return display_buffer_1 (selected_window
);
2907 /* See if the user has specified this buffer should appear
2908 in the selected window. */
2909 if (NILP (not_this_window
))
2911 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2912 if (!NILP (swp
) && !no_switch_window (selected_window
))
2914 Fswitch_to_buffer (buffer
, Qnil
);
2915 return display_buffer_1 (selected_window
);
2919 /* If the user wants pop-up-frames or display-reuse-frames, then
2920 look for a window showing BUFFER on any visible or iconified frame.
2921 Otherwise search only the current frame. */
2924 else if (pop_up_frames
2925 || display_buffer_reuse_frames
2926 || last_nonminibuf_frame
== 0)
2927 XSETFASTINT (tem
, 0);
2929 XSETFRAME (tem
, last_nonminibuf_frame
);
2931 window
= Fget_buffer_window (buffer
, tem
);
2933 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2934 return display_buffer_1 (window
);
2936 /* Certain buffer names get special handling. */
2937 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2939 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2941 return call1 (Vspecial_display_function
, buffer
);
2943 return call2 (Vspecial_display_function
, buffer
, tem
);
2946 /* If there are no frames open that have more than a minibuffer,
2947 we need to create a new frame. */
2948 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2950 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2951 Fset_window_buffer (window
, buffer
);
2952 return display_buffer_1 (window
);
2955 f
= SELECTED_FRAME ();
2957 || FRAME_MINIBUF_ONLY_P (f
)
2958 /* If the current frame is a special display frame,
2959 don't try to reuse its windows. */
2960 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2965 if (FRAME_MINIBUF_ONLY_P (f
))
2966 XSETFRAME (frames
, last_nonminibuf_frame
);
2967 /* Don't try to create a window if would get an error */
2968 if (split_height_threshold
< window_min_height
<< 1)
2969 split_height_threshold
= window_min_height
<< 1;
2971 /* Note that both Fget_largest_window and Fget_lru_window
2972 ignore minibuffers and dedicated windows.
2973 This means they can return nil. */
2975 /* If the frame we would try to split cannot be split,
2976 try other frames. */
2977 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2979 /* Try visible frames first. */
2980 window
= Fget_largest_window (Qvisible
);
2981 /* If that didn't work, try iconified frames. */
2983 window
= Fget_largest_window (make_number (0));
2985 window
= Fget_largest_window (Qt
);
2988 window
= Fget_largest_window (frames
);
2990 /* If we got a tall enough full-width window that can be split,
2993 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2994 && window_height (window
) >= split_height_threshold
2995 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2996 window
= Fsplit_window (window
, Qnil
, Qnil
);
2999 Lisp_Object upper
, lower
, other
;
3001 window
= Fget_lru_window (frames
);
3002 /* If the LRU window is selected, and big enough,
3003 and can be split, split it. */
3005 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3006 && (EQ (window
, selected_window
)
3007 || EQ (XWINDOW (window
)->parent
, Qnil
))
3008 && window_height (window
) >= window_min_height
<< 1)
3009 window
= Fsplit_window (window
, Qnil
, Qnil
);
3010 /* If Fget_lru_window returned nil, try other approaches. */
3012 /* Try visible frames first. */
3014 window
= Fget_buffer_window (buffer
, Qvisible
);
3016 window
= Fget_largest_window (Qvisible
);
3017 /* If that didn't work, try iconified frames. */
3019 window
= Fget_buffer_window (buffer
, make_number (0));
3021 window
= Fget_largest_window (make_number (0));
3022 /* Try invisible frames. */
3024 window
= Fget_buffer_window (buffer
, Qt
);
3026 window
= Fget_largest_window (Qt
);
3027 /* As a last resort, make a new frame. */
3029 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3030 /* If window appears above or below another,
3031 even out their heights. */
3032 other
= upper
= lower
= Qnil
;
3033 if (!NILP (XWINDOW (window
)->prev
))
3034 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3035 if (!NILP (XWINDOW (window
)->next
))
3036 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3038 && !NILP (Veven_window_heights
)
3039 /* Check that OTHER and WINDOW are vertically arrayed. */
3040 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3041 && (XFASTINT (XWINDOW (other
)->height
)
3042 > XFASTINT (XWINDOW (window
)->height
)))
3044 int total
= (XFASTINT (XWINDOW (other
)->height
)
3045 + XFASTINT (XWINDOW (window
)->height
));
3046 enlarge_window (upper
,
3047 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3053 window
= Fget_lru_window (Qnil
);
3055 Fset_window_buffer (window
, buffer
);
3056 return display_buffer_1 (window
);
3060 temp_output_buffer_show (buf
)
3061 register Lisp_Object buf
;
3063 register struct buffer
*old
= current_buffer
;
3064 register Lisp_Object window
;
3065 register struct window
*w
;
3067 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3070 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3074 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3075 set_buffer_internal (old
);
3077 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3078 call1 (Vtemp_buffer_show_function
, buf
);
3081 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3083 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3084 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3085 Vminibuf_scroll_window
= window
;
3086 w
= XWINDOW (window
);
3087 XSETFASTINT (w
->hscroll
, 0);
3088 XSETFASTINT (w
->min_hscroll
, 0);
3089 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3090 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3092 /* Run temp-buffer-show-hook, with the chosen window selected
3093 and it sbuffer current. */
3094 if (!NILP (Vrun_hooks
))
3097 tem
= Fboundp (Qtemp_buffer_show_hook
);
3100 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3103 int count
= specpdl_ptr
- specpdl
;
3104 Lisp_Object prev_window
;
3105 prev_window
= selected_window
;
3107 /* Select the window that was chosen, for running the hook. */
3108 record_unwind_protect (Fselect_window
, prev_window
);
3109 select_window_1 (window
, 0);
3110 Fset_buffer (w
->buffer
);
3111 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3112 select_window_1 (prev_window
, 0);
3113 unbind_to (count
, Qnil
);
3121 make_dummy_parent (window
)
3125 register struct window
*o
, *p
;
3128 o
= XWINDOW (window
);
3129 p
= allocate_window ();
3130 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3131 ((struct Lisp_Vector
*) p
)->contents
[i
]
3132 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3133 XSETWINDOW (new, p
);
3135 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3137 /* Put new into window structure in place of window */
3138 replace_window (window
, new);
3151 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3152 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3153 WINDOW defaults to selected one and SIZE to half its size.
3154 If optional third arg HORFLAG is non-nil, split side by side
3155 and put SIZE columns in the first of the pair. In that case,
3156 SIZE includes that window's scroll bar, or the divider column to its right. */)
3157 (window
, size
, horflag
)
3158 Lisp_Object window
, size
, horflag
;
3160 register Lisp_Object
new;
3161 register struct window
*o
, *p
;
3163 register int size_int
;
3166 window
= selected_window
;
3168 CHECK_LIVE_WINDOW (window
, 0);
3170 o
= XWINDOW (window
);
3171 fo
= XFRAME (WINDOW_FRAME (o
));
3175 if (!NILP (horflag
))
3176 /* Calculate the size of the left-hand window, by dividing
3177 the usable space in columns by two.
3178 We round up, since the left-hand window may include
3179 a dividing line, while the right-hand may not. */
3180 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3182 size_int
= XFASTINT (o
->height
) >> 1;
3186 CHECK_NUMBER (size
, 1);
3187 size_int
= XINT (size
);
3190 if (MINI_WINDOW_P (o
))
3191 error ("Attempt to split minibuffer window");
3192 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3193 error ("Attempt to split fixed-size window");
3195 check_min_window_sizes ();
3199 if (size_int
< window_min_height
)
3200 error ("Window height %d too small (after splitting)", size_int
);
3201 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3202 error ("Window height %d too small (after splitting)",
3203 XFASTINT (o
->height
) - size_int
);
3204 if (NILP (o
->parent
)
3205 || NILP (XWINDOW (o
->parent
)->vchild
))
3207 make_dummy_parent (window
);
3209 XWINDOW (new)->vchild
= window
;
3214 if (size_int
< window_min_width
)
3215 error ("Window width %d too small (after splitting)", size_int
);
3217 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3218 error ("Window width %d too small (after splitting)",
3219 XFASTINT (o
->width
) - size_int
);
3220 if (NILP (o
->parent
)
3221 || NILP (XWINDOW (o
->parent
)->hchild
))
3223 make_dummy_parent (window
);
3225 XWINDOW (new)->hchild
= window
;
3229 /* Now we know that window's parent is a vertical combination
3230 if we are dividing vertically, or a horizontal combination
3231 if we are making side-by-side windows */
3233 windows_or_buffers_changed
++;
3234 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3235 new = make_window ();
3238 p
->frame
= o
->frame
;
3240 if (!NILP (p
->next
))
3241 XWINDOW (p
->next
)->prev
= new;
3244 p
->parent
= o
->parent
;
3246 p
->window_end_valid
= Qnil
;
3247 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3249 /* Apportion the available frame space among the two new windows */
3251 if (!NILP (horflag
))
3253 p
->height
= o
->height
;
3255 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3256 XSETFASTINT (o
->width
, size_int
);
3257 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3262 p
->width
= o
->width
;
3263 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3264 XSETFASTINT (o
->height
, size_int
);
3265 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3268 /* Adjust glyph matrices. */
3270 Fset_window_buffer (new, o
->buffer
);
3274 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3275 doc
: /* Make current window ARG lines bigger.
3276 From program, optional second arg non-nil means grow sideways ARG columns.
3277 Interactively, if an argument is not given, make the window one line bigger. */)
3279 register Lisp_Object arg
, side
;
3281 CHECK_NUMBER (arg
, 0);
3282 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3284 if (! NILP (Vwindow_configuration_change_hook
))
3285 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3290 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3291 doc
: /* Make current window ARG lines smaller.
3292 From program, optional second arg non-nil means shrink sideways arg columns.
3293 Interactively, if an argument is not given, make the window one line smaller. */)
3295 register Lisp_Object arg
, side
;
3297 CHECK_NUMBER (arg
, 0);
3298 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3300 if (! NILP (Vwindow_configuration_change_hook
))
3301 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3307 window_height (window
)
3310 register struct window
*p
= XWINDOW (window
);
3311 return XFASTINT (p
->height
);
3315 window_width (window
)
3318 register struct window
*p
= XWINDOW (window
);
3319 return XFASTINT (p
->width
);
3324 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3326 #define CURSIZE(w) \
3327 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3330 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3331 increase its width. Siblings of the selected window are resized to
3332 fullfil the size request. If they become too small in the process,
3333 they will be deleted. */
3336 enlarge_window (window
, delta
, widthflag
)
3338 int delta
, widthflag
;
3340 Lisp_Object parent
, next
, prev
;
3344 int (*sizefun
) P_ ((Lisp_Object
))
3345 = widthflag
? window_width
: window_height
;
3346 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3347 = (widthflag
? set_window_width
: set_window_height
);
3349 /* Check values of window_min_width and window_min_height for
3351 check_min_window_sizes ();
3353 /* Give up if this window cannot be resized. */
3354 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3355 error ("Window is not resizable");
3357 /* Find the parent of the selected window. */
3360 p
= XWINDOW (window
);
3366 error ("No other window to side of this one");
3371 ? !NILP (XWINDOW (parent
)->hchild
)
3372 : !NILP (XWINDOW (parent
)->vchild
))
3378 sizep
= &CURSIZE (window
);
3381 register int maxdelta
;
3383 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3384 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3385 - window_min_size (XWINDOW (p
->next
),
3387 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3388 - window_min_size (XWINDOW (p
->prev
),
3390 /* This is a frame with only one window, a minibuffer-only
3391 or a minibufferless frame. */
3394 if (delta
> maxdelta
)
3395 /* This case traps trying to make the minibuffer
3396 the full frame, or make the only window aside from the
3397 minibuffer the full frame. */
3401 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3403 delete_window (window
);
3410 /* Find the total we can get from other siblings. */
3412 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3413 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3415 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3416 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3419 /* If we can get it all from them, do so. */
3420 if (delta
<= maximum
)
3422 Lisp_Object first_unaffected
;
3423 Lisp_Object first_affected
;
3428 first_affected
= window
;
3429 /* Look at one sibling at a time,
3430 moving away from this window in both directions alternately,
3431 and take as much as we can get without deleting that sibling. */
3432 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3436 int this_one
= ((*sizefun
) (next
)
3437 - window_min_size (XWINDOW (next
),
3438 widthflag
, 0, &fixed_p
));
3441 if (this_one
> delta
)
3444 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3445 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3450 next
= XWINDOW (next
)->next
;
3458 int this_one
= ((*sizefun
) (prev
)
3459 - window_min_size (XWINDOW (prev
),
3460 widthflag
, 0, &fixed_p
));
3463 if (this_one
> delta
)
3466 first_affected
= prev
;
3468 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3469 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3474 prev
= XWINDOW (prev
)->prev
;
3478 xassert (delta
== 0);
3480 /* Now recalculate the edge positions of all the windows affected,
3481 based on the new sizes. */
3482 first_unaffected
= next
;
3483 prev
= first_affected
;
3484 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3485 prev
= next
, next
= XWINDOW (next
)->next
)
3487 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3488 /* This does not change size of NEXT,
3489 but it propagates the new top edge to its children */
3490 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3495 register int delta1
;
3496 register int opht
= (*sizefun
) (parent
);
3498 /* If trying to grow this window to or beyond size of the parent,
3499 make delta1 so big that, on shrinking back down,
3500 all the siblings end up with less than one line and are deleted. */
3501 if (opht
<= XINT (*sizep
) + delta
)
3502 delta1
= opht
* opht
* 2;
3505 /* Otherwise, make delta1 just right so that if we add
3506 delta1 lines to this window and to the parent, and then
3507 shrink the parent back to its original size, the new
3508 proportional size of this window will increase by delta.
3510 The function size_window will compute the new height h'
3511 of the window from delta1 as:
3514 x = delta1 - delta1/n * n for the 1st resizable child
3517 where n is the number of children that can be resized.
3518 We can ignore x by choosing a delta1 that is a multiple of
3519 n. We want the height of this window to come out as
3529 The number of children n rquals the number of resizable
3530 children of this window + 1 because we know window itself
3531 is resizable (otherwise we would have signalled an error. */
3533 struct window
*w
= XWINDOW (window
);
3537 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3538 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3540 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3541 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3547 /* Add delta1 lines or columns to this window, and to the parent,
3548 keeping things consistent while not affecting siblings. */
3549 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3550 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3552 /* Squeeze out delta1 lines or columns from our parent,
3553 shriking this window and siblings proportionately.
3554 This brings parent back to correct size.
3555 Delta1 was calculated so this makes this window the desired size,
3556 taking it all out of the siblings. */
3557 (*setsizefun
) (parent
, opht
, 0);
3560 XSETFASTINT (p
->last_modified
, 0);
3561 XSETFASTINT (p
->last_overlay_modified
, 0);
3563 /* Adjust glyph matrices. */
3564 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3572 /***********************************************************************
3573 Resizing Mini-Windows
3574 ***********************************************************************/
3576 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3578 enum save_restore_action
3585 static int save_restore_orig_size
P_ ((struct window
*,
3586 enum save_restore_action
));
3588 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3589 from lowest windows first. */
3592 shrink_window_lowest_first (w
, height
)
3600 xassert (!MINI_WINDOW_P (w
));
3602 /* Set redisplay hints. */
3603 XSETFASTINT (w
->last_modified
, 0);
3604 XSETFASTINT (w
->last_overlay_modified
, 0);
3605 windows_or_buffers_changed
++;
3606 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3608 old_height
= XFASTINT (w
->height
);
3609 XSETFASTINT (w
->height
, height
);
3611 if (!NILP (w
->hchild
))
3613 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3615 c
= XWINDOW (child
);
3617 shrink_window_lowest_first (c
, height
);
3620 else if (!NILP (w
->vchild
))
3622 Lisp_Object last_child
;
3623 int delta
= old_height
- height
;
3628 /* Find the last child. We are taking space from lowest windows
3629 first, so we iterate over children from the last child
3631 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3634 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3635 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3639 c
= XWINDOW (child
);
3640 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3642 if (this_one
> delta
)
3645 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3649 /* Compute new positions. */
3650 last_top
= XINT (w
->top
);
3651 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3653 c
= XWINDOW (child
);
3654 c
->top
= make_number (last_top
);
3655 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3656 last_top
+= XFASTINT (c
->height
);
3662 /* Save, restore, or check positions and sizes in the window tree
3663 rooted at W. ACTION says what to do.
3665 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3666 members are valid for all windows in the window tree. Value is
3667 non-zero if they are valid.
3669 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3670 orig_top and orig_height for all windows in the tree.
3672 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3673 values stored in orig_top and orig_height for all windows. */
3676 save_restore_orig_size (w
, action
)
3678 enum save_restore_action action
;
3684 if (!NILP (w
->hchild
))
3686 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3689 else if (!NILP (w
->vchild
))
3691 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3697 case CHECK_ORIG_SIZES
:
3698 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3702 case SAVE_ORIG_SIZES
:
3703 w
->orig_top
= w
->top
;
3704 w
->orig_height
= w
->height
;
3705 XSETFASTINT (w
->last_modified
, 0);
3706 XSETFASTINT (w
->last_overlay_modified
, 0);
3709 case RESTORE_ORIG_SIZES
:
3710 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3711 w
->top
= w
->orig_top
;
3712 w
->height
= w
->orig_height
;
3713 w
->orig_height
= w
->orig_top
= Qnil
;
3714 XSETFASTINT (w
->last_modified
, 0);
3715 XSETFASTINT (w
->last_overlay_modified
, 0);
3722 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3729 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3730 without deleting other windows. */
3733 grow_mini_window (w
, delta
)
3737 struct frame
*f
= XFRAME (w
->frame
);
3738 struct window
*root
;
3740 xassert (MINI_WINDOW_P (w
));
3741 xassert (delta
>= 0);
3743 /* Check values of window_min_width and window_min_height for
3745 check_min_window_sizes ();
3747 /* Compute how much we can enlarge the mini-window without deleting
3749 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3752 int min_height
= window_min_size (root
, 0, 0, 0);
3753 if (XFASTINT (root
->height
) - delta
< min_height
)
3754 /* Note that the roor window may already be smaller than
3756 delta
= max (0, XFASTINT (root
->height
) - min_height
);
3761 /* Save original window sizes and positions, if not already done. */
3762 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3763 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3765 /* Shrink other windows. */
3766 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3768 /* Grow the mini-window. */
3769 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3770 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3771 XSETFASTINT (w
->last_modified
, 0);
3772 XSETFASTINT (w
->last_overlay_modified
, 0);
3779 /* Shrink mini-window W. If there is recorded info about window sizes
3780 before a call to grow_mini_window, restore recorded window sizes.
3781 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3785 shrink_mini_window (w
)
3788 struct frame
*f
= XFRAME (w
->frame
);
3789 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3791 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3793 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3795 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3796 windows_or_buffers_changed
= 1;
3798 else if (XFASTINT (w
->height
) > 1)
3800 /* Distribute the additional lines of the mini-window
3801 among the other windows. */
3803 XSETWINDOW (window
, w
);
3804 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3810 /* Mark window cursors off for all windows in the window tree rooted
3811 at W by setting their phys_cursor_on_p flag to zero. Called from
3812 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3813 the frame are cleared. */
3816 mark_window_cursors_off (w
)
3821 if (!NILP (w
->hchild
))
3822 mark_window_cursors_off (XWINDOW (w
->hchild
));
3823 else if (!NILP (w
->vchild
))
3824 mark_window_cursors_off (XWINDOW (w
->vchild
));
3826 w
->phys_cursor_on_p
= 0;
3828 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3833 /* Return number of lines of text (not counting mode lines) in W. */
3836 window_internal_height (w
)
3839 int ht
= XFASTINT (w
->height
);
3841 if (!MINI_WINDOW_P (w
))
3843 if (!NILP (w
->parent
)
3844 || !NILP (w
->vchild
)
3845 || !NILP (w
->hchild
)
3848 || WINDOW_WANTS_MODELINE_P (w
))
3851 if (WINDOW_WANTS_HEADER_LINE_P (w
))
3859 /* Return the number of columns in W.
3860 Don't count columns occupied by scroll bars or the vertical bar
3861 separating W from the sibling to its right. */
3864 window_internal_width (w
)
3867 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3868 int width
= XINT (w
->width
);
3870 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3871 /* Scroll bars occupy a few columns. */
3872 width
-= FRAME_SCROLL_BAR_COLS (f
);
3873 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3874 /* The column of `|' characters separating side-by-side windows
3875 occupies one column only. */
3878 /* On window-systems, areas to the left and right of the window
3879 are used to display bitmaps there. */
3880 if (FRAME_WINDOW_P (f
))
3881 width
-= FRAME_FLAGS_AREA_COLS (f
);
3887 /************************************************************************
3889 ***********************************************************************/
3891 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3892 N screen-fulls, which is defined as the height of the window minus
3893 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3894 instead. Negative values of N mean scroll down. NOERROR non-zero
3895 means don't signal an error if we try to move over BEGV or ZV,
3899 window_scroll (window
, n
, whole
, noerror
)
3905 /* If we must, use the pixel-based version which is much slower than
3906 the line-based one but can handle varying line heights. */
3907 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3908 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3910 window_scroll_line_based (window
, n
, whole
, noerror
);
3914 /* Implementation of window_scroll that works based on pixel line
3915 heights. See the comment of window_scroll for parameter
3919 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3926 struct window
*w
= XWINDOW (window
);
3927 struct text_pos start
;
3929 int this_scroll_margin
;
3931 /* True if we fiddled the window vscroll field without really scrolling. */
3934 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3936 /* If PT is not visible in WINDOW, move back one half of
3937 the screen. Allow PT to be partially visible, otherwise
3938 something like (scroll-down 1) with PT in the line before
3939 the partially visible one would recenter. */
3940 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
3943 /* Move backward half the height of the window. Performance note:
3944 vmotion used here is about 10% faster, but would give wrong
3945 results for variable height lines. */
3946 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3947 it
.current_y
= it
.last_visible_y
;
3948 move_it_vertically (&it
, - window_box_height (w
) / 2);
3950 /* The function move_iterator_vertically may move over more than
3951 the specified y-distance. If it->w is small, e.g. a
3952 mini-buffer window, we may end up in front of the window's
3953 display area. This is the case when Start displaying at the
3954 start of the line containing PT in this case. */
3955 if (it
.current_y
<= 0)
3957 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3958 move_it_vertically (&it
, 0);
3962 start
= it
.current
.pos
;
3965 /* If scroll_preserve_screen_position is non-zero, we try to set
3966 point in the same window line as it is now, so get that line. */
3967 if (!NILP (Vscroll_preserve_screen_position
))
3969 start_display (&it
, w
, start
);
3970 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3971 preserve_y
= it
.current_y
;
3976 /* Move iterator it from start the specified distance forward or
3977 backward. The result is the new window start. */
3978 start_display (&it
, w
, start
);
3981 int screen_full
= (window_box_height (w
)
3982 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3983 int dy
= n
* screen_full
;
3985 /* Note that move_it_vertically always moves the iterator to the
3986 start of a line. So, if the last line doesn't have a newline,
3987 we would end up at the start of the line ending at ZV. */
3989 move_it_vertically_backward (&it
, -dy
);
3991 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
3992 MOVE_TO_POS
| MOVE_TO_Y
);
3995 move_it_by_lines (&it
, n
, 1);
3997 /* End if we end up at ZV or BEGV. */
3998 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3999 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4001 if (IT_CHARPOS (it
) == ZV
)
4003 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4004 > it
.last_visible_y
)
4006 /* The last line was only partially visible, make it fully
4008 w
->vscroll
= (it
.last_visible_y
4009 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4010 adjust_glyphs (it
.f
);
4015 Fsignal (Qend_of_buffer
, Qnil
);
4019 if (w
->vscroll
!= 0)
4020 /* The first line was only partially visible, make it fully
4026 Fsignal (Qbeginning_of_buffer
, Qnil
);
4029 /* If control gets here, then we vscrolled. */
4031 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4033 /* Don't try to change the window start below. */
4039 /* Set the window start, and set up the window for redisplay. */
4040 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4042 w
->start_at_line_beg
= Fbolp ();
4043 w
->update_mode_line
= Qt
;
4044 XSETFASTINT (w
->last_modified
, 0);
4045 XSETFASTINT (w
->last_overlay_modified
, 0);
4046 /* Set force_start so that redisplay_window will run the
4047 window-scroll-functions. */
4048 w
->force_start
= Qt
;
4051 it
.current_y
= it
.vpos
= 0;
4053 /* Preserve the screen position if we must. */
4054 if (preserve_y
>= 0)
4056 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4057 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4061 /* Move PT out of scroll margins. */
4062 this_scroll_margin
= max (0, scroll_margin
);
4063 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4064 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4068 /* We moved the window start towards ZV, so PT may be now
4069 in the scroll margin at the top. */
4070 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4071 while (it
.current_y
< this_scroll_margin
)
4072 move_it_by_lines (&it
, 1, 1);
4073 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4077 int charpos
, bytepos
;
4079 /* We moved the window start towards BEGV, so PT may be now
4080 in the scroll margin at the bottom. */
4081 move_it_to (&it
, PT
, -1,
4082 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4083 MOVE_TO_POS
| MOVE_TO_Y
);
4085 /* Save our position, in case it's correct. */
4086 charpos
= IT_CHARPOS (it
);
4087 bytepos
= IT_BYTEPOS (it
);
4089 /* See if point is on a partially visible line at the end. */
4090 move_it_by_lines (&it
, 1, 1);
4091 if (it
.current_y
> it
.last_visible_y
)
4092 /* The last line was only partially visible, so back up two
4093 lines to make sure we're on a fully visible line. */
4095 move_it_by_lines (&it
, -2, 0);
4096 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4099 /* No, the position we saved is OK, so use it. */
4100 SET_PT_BOTH (charpos
, bytepos
);
4106 /* Implementation of window_scroll that works based on screen lines.
4107 See the comment of window_scroll for parameter descriptions. */
4110 window_scroll_line_based (window
, n
, whole
, noerror
)
4116 register struct window
*w
= XWINDOW (window
);
4117 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4118 register int pos
, pos_byte
;
4119 register int ht
= window_internal_height (w
);
4120 register Lisp_Object tem
;
4124 struct position posit
;
4127 /* If scrolling screen-fulls, compute the number of lines to
4128 scroll from the window's height. */
4130 n
*= max (1, ht
- next_screen_context_lines
);
4132 startpos
= marker_position (w
->start
);
4134 posit
= *compute_motion (startpos
, 0, 0, 0,
4136 window_internal_width (w
), XINT (w
->hscroll
),
4138 original_vpos
= posit
.vpos
;
4140 XSETFASTINT (tem
, PT
);
4141 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4145 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4150 lose
= n
< 0 && PT
== BEGV
;
4151 Fvertical_motion (make_number (n
), window
);
4155 SET_PT_BOTH (opoint
, opoint_byte
);
4162 Fsignal (Qbeginning_of_buffer
, Qnil
);
4167 int this_scroll_margin
= scroll_margin
;
4169 /* Don't use a scroll margin that is negative or too large. */
4170 if (this_scroll_margin
< 0)
4171 this_scroll_margin
= 0;
4173 if (XINT (w
->height
) < 4 * scroll_margin
)
4174 this_scroll_margin
= XINT (w
->height
) / 4;
4176 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4177 w
->start_at_line_beg
= bolp
;
4178 w
->update_mode_line
= Qt
;
4179 XSETFASTINT (w
->last_modified
, 0);
4180 XSETFASTINT (w
->last_overlay_modified
, 0);
4181 /* Set force_start so that redisplay_window will run
4182 the window-scroll-functions. */
4183 w
->force_start
= Qt
;
4185 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4187 SET_PT_BOTH (pos
, pos_byte
);
4188 Fvertical_motion (make_number (original_vpos
), window
);
4190 /* If we scrolled forward, put point enough lines down
4191 that it is outside the scroll margin. */
4196 if (this_scroll_margin
> 0)
4198 SET_PT_BOTH (pos
, pos_byte
);
4199 Fvertical_motion (make_number (this_scroll_margin
), window
);
4205 if (top_margin
<= opoint
)
4206 SET_PT_BOTH (opoint
, opoint_byte
);
4207 else if (!NILP (Vscroll_preserve_screen_position
))
4209 SET_PT_BOTH (pos
, pos_byte
);
4210 Fvertical_motion (make_number (original_vpos
), window
);
4213 SET_PT (top_margin
);
4219 /* If we scrolled backward, put point near the end of the window
4220 but not within the scroll margin. */
4221 SET_PT_BOTH (pos
, pos_byte
);
4222 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4223 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4226 bottom_margin
= PT
+ 1;
4228 if (bottom_margin
> opoint
)
4229 SET_PT_BOTH (opoint
, opoint_byte
);
4232 if (!NILP (Vscroll_preserve_screen_position
))
4234 SET_PT_BOTH (pos
, pos_byte
);
4235 Fvertical_motion (make_number (original_vpos
), window
);
4238 Fvertical_motion (make_number (-1), window
);
4247 Fsignal (Qend_of_buffer
, Qnil
);
4252 /* Scroll selected_window up or down. If N is nil, scroll a
4253 screen-full which is defined as the height of the window minus
4254 next_screen_context_lines. If N is the symbol `-', scroll.
4255 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4256 up. This is the guts of Fscroll_up and Fscroll_down. */
4259 scroll_command (n
, direction
)
4263 int count
= BINDING_STACK_SIZE ();
4265 xassert (abs (direction
) == 1);
4267 /* If selected window's buffer isn't current, make it current for
4268 the moment. But don't screw up if window_scroll gets an error. */
4269 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4271 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4272 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4274 /* Make redisplay consider other windows than just selected_window. */
4275 ++windows_or_buffers_changed
;
4279 window_scroll (selected_window
, direction
, 1, 0);
4280 else if (EQ (n
, Qminus
))
4281 window_scroll (selected_window
, -direction
, 1, 0);
4284 n
= Fprefix_numeric_value (n
);
4285 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4288 unbind_to (count
, Qnil
);
4291 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4292 doc
: /* Scroll text of current window upward ARG lines; or near full screen if no ARG.
4293 A near full screen is `next-screen-context-lines' less than a full screen.
4294 Negative ARG means scroll downward.
4295 If ARG is the atom `-', scroll downward by nearly full screen.
4296 When calling from a program, supply as argument a number, nil, or `-'. */)
4300 scroll_command (arg
, 1);
4304 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4305 doc
: /* Scroll text of current window down ARG lines; or near full screen if no ARG.
4306 A near full screen is `next-screen-context-lines' less than a full screen.
4307 Negative ARG means scroll upward.
4308 If ARG is the atom `-', scroll upward by nearly full screen.
4309 When calling from a program, supply as argument a number, nil, or `-'. */)
4313 scroll_command (arg
, -1);
4317 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4318 doc
: /* Return the other window for \"other window scroll\" commands.
4319 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4320 specifies the window.
4321 If `other-window-scroll-buffer' is non-nil, a window
4322 showing that buffer is used. */)
4327 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4328 && !NILP (Vminibuf_scroll_window
))
4329 window
= Vminibuf_scroll_window
;
4330 /* If buffer is specified, scroll that buffer. */
4331 else if (!NILP (Vother_window_scroll_buffer
))
4333 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4335 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4339 /* Nothing specified; look for a neighboring window on the same
4341 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4343 if (EQ (window
, selected_window
))
4344 /* That didn't get us anywhere; look for a window on another
4347 window
= Fnext_window (window
, Qnil
, Qt
);
4348 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4349 && ! EQ (window
, selected_window
));
4352 CHECK_LIVE_WINDOW (window
, 0);
4354 if (EQ (window
, selected_window
))
4355 error ("There is no other window");
4360 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4361 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
4362 A near full screen is `next-screen-context-lines' less than a full screen.
4363 The next window is the one below the current one; or the one at the top
4364 if the current one is at the bottom. Negative ARG means scroll downward.
4365 If ARG is the atom `-', scroll downward by nearly full screen.
4366 When calling from a program, supply as argument a number, nil, or `-'.
4368 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4369 specifies the window to scroll.
4370 If `other-window-scroll-buffer' is non-nil, scroll the window
4371 showing that buffer, popping the buffer up if necessary. */)
4377 int count
= BINDING_STACK_SIZE ();
4379 window
= Fother_window_for_scrolling ();
4380 w
= XWINDOW (window
);
4382 /* Don't screw up if window_scroll gets an error. */
4383 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4384 ++windows_or_buffers_changed
;
4386 Fset_buffer (w
->buffer
);
4387 SET_PT (marker_position (w
->pointm
));
4390 window_scroll (window
, 1, 1, 1);
4391 else if (EQ (arg
, Qminus
))
4392 window_scroll (window
, -1, 1, 1);
4397 CHECK_NUMBER (arg
, 0);
4398 window_scroll (window
, XINT (arg
), 0, 1);
4401 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4402 unbind_to (count
, Qnil
);
4407 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4408 doc
: /* Scroll selected window display ARG columns left.
4409 Default for ARG is window width minus 2.
4410 Value is the total amount of leftward horizontal scrolling in
4411 effect after the change.
4412 If `automatic-hscrolling' is non-nil, the argument ARG modifies
4413 a lower bound for automatic scrolling, i.e. automatic scrolling
4414 will not scroll a window to a column less than the value returned
4415 by this function. */)
4417 register Lisp_Object arg
;
4421 struct window
*w
= XWINDOW (selected_window
);
4424 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4426 arg
= Fprefix_numeric_value (arg
);
4428 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
4429 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4431 if (interactive_p (0))
4432 w
->min_hscroll
= w
->hscroll
;
4437 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4438 doc
: /* Scroll selected window display ARG columns right.
4439 Default for ARG is window width minus 2.
4440 Value is the total amount of leftward horizontal scrolling in
4441 effect after the change.
4442 If `automatic-hscrolling' is non-nil, the argument ARG modifies
4443 a lower bound for automatic scrolling, i.e. automatic scrolling
4444 will not scroll a window to a column less than the value returned
4445 by this function. */)
4447 register Lisp_Object arg
;
4451 struct window
*w
= XWINDOW (selected_window
);
4454 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4456 arg
= Fprefix_numeric_value (arg
);
4458 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
4459 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4461 if (interactive_p (0))
4462 w
->min_hscroll
= w
->hscroll
;
4467 /* Value is the number of lines actually displayed in window W,
4468 as opposed to its height. */
4471 displayed_window_lines (w
)
4475 struct text_pos start
;
4476 int height
= window_box_height (w
);
4477 struct buffer
*old_buffer
;
4480 if (XBUFFER (w
->buffer
) != current_buffer
)
4482 old_buffer
= current_buffer
;
4483 set_buffer_internal (XBUFFER (w
->buffer
));
4488 /* In case W->start is out of the accessible range, do something
4489 reasonable. This happens in Info mode when Info-scroll-down
4490 calls (recenter -1) while W->start is 1. */
4491 if (XMARKER (w
->start
)->charpos
< BEGV
)
4492 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
4493 else if (XMARKER (w
->start
)->charpos
> ZV
)
4494 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
4496 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4498 start_display (&it
, w
, start
);
4499 move_it_vertically (&it
, height
);
4500 bottom_y
= line_bottom_y (&it
);
4502 /* Add in empty lines at the bottom of the window. */
4503 if (bottom_y
< height
)
4505 int uy
= CANON_Y_UNIT (it
.f
);
4506 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
4510 set_buffer_internal (old_buffer
);
4516 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4517 doc
: /* Center point in window and redisplay frame.
4518 With prefix argument ARG, recenter putting point on screen line ARG
4519 relative to the current window. If ARG is negative, it counts up from the
4520 bottom of the window. (ARG should be less than the height of the window.)
4522 If ARG is omitted or nil, erase the entire frame and then
4523 redraw with point in the center of the current window.
4524 Just C-u as prefix means put point in the center of the window
4525 and redisplay normally--don't erase and redraw the frame. */)
4527 register Lisp_Object arg
;
4529 struct window
*w
= XWINDOW (selected_window
);
4530 struct buffer
*buf
= XBUFFER (w
->buffer
);
4531 struct buffer
*obuf
= current_buffer
;
4533 int charpos
, bytepos
;
4539 /* Invalidate pixel data calculated for all compositions. */
4540 for (i
= 0; i
< n_compositions
; i
++)
4541 composition_table
[i
]->font
= NULL
;
4543 Fredraw_frame (w
->frame
);
4544 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4547 else if (CONSP (arg
)) /* Just C-u. */
4551 arg
= Fprefix_numeric_value (arg
);
4552 CHECK_NUMBER (arg
, 0);
4555 set_buffer_internal (buf
);
4557 /* Handle centering on a graphical frame specially. Such frames can
4558 have variable-height lines and centering point on the basis of
4559 line counts would lead to strange effects. */
4560 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
4567 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4568 start_display (&it
, w
, pt
);
4569 move_it_vertically (&it
, - window_box_height (w
) / 2);
4570 charpos
= IT_CHARPOS (it
);
4571 bytepos
= IT_BYTEPOS (it
);
4573 else if (XINT (arg
) < 0)
4577 int y0
, y1
, h
, nlines
;
4579 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4580 start_display (&it
, w
, pt
);
4583 /* The amount of pixels we have to move back is the window
4584 height minus what's displayed in the line containing PT,
4585 and the lines below. */
4586 nlines
= - XINT (arg
) - 1;
4587 move_it_by_lines (&it
, nlines
, 1);
4589 y1
= it
.current_y
- y0
;
4590 h
= line_bottom_y (&it
) - y1
;
4592 /* If we can't move down NLINES lines because we hit
4593 the end of the buffer, count in some empty lines. */
4594 if (it
.vpos
< nlines
)
4595 y1
+= (nlines
- it
.vpos
) * CANON_Y_UNIT (it
.f
);
4597 y0
= it
.last_visible_y
- y1
- h
;
4599 start_display (&it
, w
, pt
);
4600 move_it_vertically (&it
, - y0
);
4601 charpos
= IT_CHARPOS (it
);
4602 bytepos
= IT_BYTEPOS (it
);
4606 struct position pos
;
4607 pos
= *vmotion (PT
, - XINT (arg
), w
);
4608 charpos
= pos
.bufpos
;
4609 bytepos
= pos
.bytepos
;
4614 struct position pos
;
4615 int ht
= window_internal_height (w
);
4618 arg
= make_number (ht
/ 2);
4619 else if (XINT (arg
) < 0)
4620 arg
= make_number (XINT (arg
) + ht
);
4622 pos
= *vmotion (PT
, - XINT (arg
), w
);
4623 charpos
= pos
.bufpos
;
4624 bytepos
= pos
.bytepos
;
4627 /* Set the new window start. */
4628 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4629 w
->window_end_valid
= Qnil
;
4630 w
->force_start
= Qt
;
4631 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4632 w
->start_at_line_beg
= Qt
;
4634 w
->start_at_line_beg
= Qnil
;
4636 set_buffer_internal (obuf
);
4641 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4643 doc
: /* Return the height in lines of the text display area of WINDOW.
4644 This doesn't include the mode-line (or header-line if any) or any
4645 partial-height lines in the text display area. */)
4649 struct window
*w
= decode_window (window
);
4650 int pixel_height
= window_box_height (w
);
4651 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4652 return make_number (line_height
);
4657 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4659 doc
: /* Position point relative to window.
4660 With no argument, position point at center of window.
4661 An argument specifies vertical position within the window;
4662 zero means top of window, negative means relative to bottom of window. */)
4666 struct window
*w
= XWINDOW (selected_window
);
4670 window
= selected_window
;
4671 start
= marker_position (w
->start
);
4672 if (start
< BEGV
|| start
> ZV
)
4674 int height
= window_internal_height (w
);
4675 Fvertical_motion (make_number (- (height
/ 2)), window
);
4676 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4677 w
->start_at_line_beg
= Fbolp ();
4678 w
->force_start
= Qt
;
4681 Fgoto_char (w
->start
);
4683 lines
= displayed_window_lines (w
);
4685 XSETFASTINT (arg
, lines
/ 2);
4688 arg
= Fprefix_numeric_value (arg
);
4690 XSETINT (arg
, XINT (arg
) + lines
);
4693 /* Skip past a partially visible first line. */
4695 XSETINT (arg
, XINT (arg
) + 1);
4697 return Fvertical_motion (arg
, window
);
4702 /***********************************************************************
4703 Window Configuration
4704 ***********************************************************************/
4706 struct save_window_data
4708 EMACS_INT size_from_Lisp_Vector_struct
;
4709 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4710 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4711 Lisp_Object frame_tool_bar_lines
;
4712 Lisp_Object selected_frame
;
4713 Lisp_Object current_window
;
4714 Lisp_Object current_buffer
;
4715 Lisp_Object minibuf_scroll_window
;
4716 Lisp_Object root_window
;
4717 Lisp_Object focus_frame
;
4718 /* Record the values of window-min-width and window-min-height
4719 so that window sizes remain consistent with them. */
4720 Lisp_Object min_width
, min_height
;
4721 /* A vector, each of whose elements is a struct saved_window
4723 Lisp_Object saved_windows
;
4726 /* This is saved as a Lisp_Vector */
4729 /* these first two must agree with struct Lisp_Vector in lisp.h */
4730 EMACS_INT size_from_Lisp_Vector_struct
;
4731 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4734 Lisp_Object buffer
, start
, pointm
, mark
;
4735 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4736 Lisp_Object parent
, prev
;
4737 Lisp_Object start_at_line_beg
;
4738 Lisp_Object display_table
;
4739 Lisp_Object orig_top
, orig_height
;
4742 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4744 #define SAVED_WINDOW_N(swv,n) \
4745 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4747 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4748 doc
: /* Return t if OBJECT is a window-configuration object. */)
4752 if (WINDOW_CONFIGURATIONP (object
))
4757 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4758 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
4762 register struct save_window_data
*data
;
4763 struct Lisp_Vector
*saved_windows
;
4765 if (! WINDOW_CONFIGURATIONP (config
))
4766 wrong_type_argument (Qwindow_configuration_p
, config
);
4768 data
= (struct save_window_data
*) XVECTOR (config
);
4769 saved_windows
= XVECTOR (data
->saved_windows
);
4770 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4773 DEFUN ("set-window-configuration", Fset_window_configuration
,
4774 Sset_window_configuration
, 1, 1, 0,
4775 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
4776 CONFIGURATION must be a value previously returned
4777 by `current-window-configuration' (which see).
4778 If CONFIGURATION was made from a frame that is now deleted,
4779 only frame-independent values can be restored. In this case,
4780 the return value is nil. Otherwise the value is t. */)
4782 Lisp_Object configuration
;
4784 register struct save_window_data
*data
;
4785 struct Lisp_Vector
*saved_windows
;
4786 Lisp_Object new_current_buffer
;
4791 while (!WINDOW_CONFIGURATIONP (configuration
))
4792 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4794 data
= (struct save_window_data
*) XVECTOR (configuration
);
4795 saved_windows
= XVECTOR (data
->saved_windows
);
4797 new_current_buffer
= data
->current_buffer
;
4798 if (NILP (XBUFFER (new_current_buffer
)->name
))
4799 new_current_buffer
= Qnil
;
4802 if (XBUFFER (new_current_buffer
) == current_buffer
)
4806 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4809 /* If f is a dead frame, don't bother rebuilding its window tree.
4810 However, there is other stuff we should still try to do below. */
4811 if (FRAME_LIVE_P (f
))
4813 register struct window
*w
;
4814 register struct saved_window
*p
;
4815 struct window
*root_window
;
4816 struct window
**leaf_windows
;
4820 /* If the frame has been resized since this window configuration was
4821 made, we change the frame to the size specified in the
4822 configuration, restore the configuration, and then resize it
4823 back. We keep track of the prevailing height in these variables. */
4824 int previous_frame_height
= FRAME_HEIGHT (f
);
4825 int previous_frame_width
= FRAME_WIDTH (f
);
4826 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4827 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4829 /* The mouse highlighting code could get screwed up
4830 if it runs during this. */
4833 if (XFASTINT (data
->frame_height
) != previous_frame_height
4834 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4835 change_frame_size (f
, XFASTINT (data
->frame_height
),
4836 XFASTINT (data
->frame_width
), 0, 0, 0);
4837 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4838 if (XFASTINT (data
->frame_menu_bar_lines
)
4839 != previous_frame_menu_bar_lines
)
4840 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4841 #ifdef HAVE_WINDOW_SYSTEM
4842 if (XFASTINT (data
->frame_tool_bar_lines
)
4843 != previous_frame_tool_bar_lines
)
4844 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4848 /* "Swap out" point from the selected window
4849 into its buffer. We do this now, before
4850 restoring the window contents, and prevent it from
4851 being done later on when we select a new window. */
4852 if (! NILP (XWINDOW (selected_window
)->buffer
))
4854 w
= XWINDOW (selected_window
);
4855 set_marker_both (w
->pointm
,
4857 BUF_PT (XBUFFER (w
->buffer
)),
4858 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4861 windows_or_buffers_changed
++;
4862 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4864 /* Problem: Freeing all matrices and later allocating them again
4865 is a serious redisplay flickering problem. What we would
4866 really like to do is to free only those matrices not reused
4868 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4870 = (struct window
**) alloca (count_windows (root_window
)
4871 * sizeof (struct window
*));
4872 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4874 /* Temporarily avoid any problems with windows that are smaller
4875 than they are supposed to be. */
4876 window_min_height
= 1;
4877 window_min_width
= 1;
4880 Mark all windows now on frame as "deleted".
4881 Restoring the new configuration "undeletes" any that are in it.
4883 Save their current buffers in their height fields, since we may
4884 need it later, if a buffer saved in the configuration is now
4886 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4888 for (k
= 0; k
< saved_windows
->size
; k
++)
4890 p
= SAVED_WINDOW_N (saved_windows
, k
);
4891 w
= XWINDOW (p
->window
);
4894 if (!NILP (p
->parent
))
4895 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4896 XFASTINT (p
->parent
))->window
;
4900 if (!NILP (p
->prev
))
4902 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4903 XFASTINT (p
->prev
))->window
;
4904 XWINDOW (w
->prev
)->next
= p
->window
;
4909 if (!NILP (w
->parent
))
4911 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4913 XWINDOW (w
->parent
)->vchild
= p
->window
;
4914 XWINDOW (w
->parent
)->hchild
= Qnil
;
4918 XWINDOW (w
->parent
)->hchild
= p
->window
;
4919 XWINDOW (w
->parent
)->vchild
= Qnil
;
4924 /* If we squirreled away the buffer in the window's height,
4926 if (BUFFERP (w
->height
))
4927 w
->buffer
= w
->height
;
4930 w
->width
= p
->width
;
4931 w
->height
= p
->height
;
4932 w
->hscroll
= p
->hscroll
;
4933 w
->min_hscroll
= p
->min_hscroll
;
4934 w
->display_table
= p
->display_table
;
4935 w
->orig_top
= p
->orig_top
;
4936 w
->orig_height
= p
->orig_height
;
4937 XSETFASTINT (w
->last_modified
, 0);
4938 XSETFASTINT (w
->last_overlay_modified
, 0);
4940 /* Reinstall the saved buffer and pointers into it. */
4941 if (NILP (p
->buffer
))
4942 w
->buffer
= p
->buffer
;
4945 if (!NILP (XBUFFER (p
->buffer
)->name
))
4946 /* If saved buffer is alive, install it. */
4948 w
->buffer
= p
->buffer
;
4949 w
->start_at_line_beg
= p
->start_at_line_beg
;
4950 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4951 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4952 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4953 p
->mark
, w
->buffer
);
4955 /* As documented in Fcurrent_window_configuration, don't
4956 save the location of point in the buffer which was current
4957 when the window configuration was recorded. */
4958 if (!EQ (p
->buffer
, new_current_buffer
)
4959 && XBUFFER (p
->buffer
) == current_buffer
)
4960 Fgoto_char (w
->pointm
);
4962 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4963 /* Else unless window has a live buffer, get one. */
4965 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4966 /* This will set the markers to beginning of visible
4968 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4969 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4970 w
->start_at_line_beg
= Qt
;
4973 /* Keeping window's old buffer; make sure the markers
4976 /* Set window markers at start of visible range. */
4977 if (XMARKER (w
->start
)->buffer
== 0)
4978 set_marker_restricted (w
->start
, make_number (0),
4980 if (XMARKER (w
->pointm
)->buffer
== 0)
4981 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4982 BUF_PT (XBUFFER (w
->buffer
)),
4983 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4984 w
->start_at_line_beg
= Qt
;
4989 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4990 /* Prevent "swapping out point" in the old selected window
4991 using the buffer that has been restored into it.
4992 That swapping out has already been done,
4993 near the beginning of this function. */
4994 selected_window
= Qnil
;
4995 Fselect_window (data
->current_window
);
4996 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4999 if (NILP (data
->focus_frame
)
5000 || (FRAMEP (data
->focus_frame
)
5001 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5002 Fredirect_frame_focus (frame
, data
->focus_frame
);
5004 #if 0 /* I don't understand why this is needed, and it causes problems
5005 when the frame's old selected window has been deleted. */
5006 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5007 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5011 /* Set the screen height to the value it had before this function. */
5012 if (previous_frame_height
!= FRAME_HEIGHT (f
)
5013 || previous_frame_width
!= FRAME_WIDTH (f
))
5014 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
5016 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5017 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5018 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5020 #ifdef HAVE_WINDOW_SYSTEM
5021 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5022 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5027 /* Now, free glyph matrices in windows that were not reused. */
5028 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5030 if (NILP (leaf_windows
[i
]->buffer
))
5032 /* Assert it's not reused as a combination. */
5033 xassert (NILP (leaf_windows
[i
]->hchild
)
5034 && NILP (leaf_windows
[i
]->vchild
));
5035 free_window_matrices (leaf_windows
[i
]);
5037 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5041 /* If more than one window shows the new and old current buffer,
5042 don't try to preserve point in that buffer. */
5043 if (old_point
> 0 && n
> 1)
5050 /* Fselect_window will have made f the selected frame, so we
5051 reselect the proper frame here. Fhandle_switch_frame will change the
5052 selected window too, but that doesn't make the call to
5053 Fselect_window above totally superfluous; it still sets f's
5055 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5056 do_switch_frame (data
->selected_frame
, 0, 0);
5058 if (! NILP (Vwindow_configuration_change_hook
)
5059 && ! NILP (Vrun_hooks
))
5060 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5063 if (!NILP (new_current_buffer
))
5065 Fset_buffer (new_current_buffer
);
5067 /* If the buffer that is current now is the same
5068 that was current before setting the window configuration,
5069 don't alter its PT. */
5074 /* Restore the minimum heights recorded in the configuration. */
5075 window_min_height
= XINT (data
->min_height
);
5076 window_min_width
= XINT (data
->min_width
);
5078 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5080 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5083 /* Mark all windows now on frame as deleted
5084 by setting their buffers to nil. */
5087 delete_all_subwindows (w
)
5088 register struct window
*w
;
5090 if (!NILP (w
->next
))
5091 delete_all_subwindows (XWINDOW (w
->next
));
5092 if (!NILP (w
->vchild
))
5093 delete_all_subwindows (XWINDOW (w
->vchild
));
5094 if (!NILP (w
->hchild
))
5095 delete_all_subwindows (XWINDOW (w
->hchild
));
5097 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5099 if (!NILP (w
->buffer
))
5102 /* We set all three of these fields to nil, to make sure that we can
5103 distinguish this dead window from any live window. Live leaf
5104 windows will have buffer set, and combination windows will have
5105 vchild or hchild set. */
5110 Vwindow_list
= Qnil
;
5114 count_windows (window
)
5115 register struct window
*window
;
5117 register int count
= 1;
5118 if (!NILP (window
->next
))
5119 count
+= count_windows (XWINDOW (window
->next
));
5120 if (!NILP (window
->vchild
))
5121 count
+= count_windows (XWINDOW (window
->vchild
));
5122 if (!NILP (window
->hchild
))
5123 count
+= count_windows (XWINDOW (window
->hchild
));
5128 /* Fill vector FLAT with leaf windows under W, starting at index I.
5129 Value is last index + 1. */
5132 get_leaf_windows (w
, flat
, i
)
5134 struct window
**flat
;
5139 if (!NILP (w
->hchild
))
5140 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5141 else if (!NILP (w
->vchild
))
5142 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5146 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5153 /* Return a pointer to the glyph W's physical cursor is on. Value is
5154 null if W's current matrix is invalid, so that no meaningfull glyph
5158 get_phys_cursor_glyph (w
)
5161 struct glyph_row
*row
;
5162 struct glyph
*glyph
;
5164 if (w
->phys_cursor
.vpos
>= 0
5165 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5166 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5168 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5169 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5178 save_window_save (window
, vector
, i
)
5180 struct Lisp_Vector
*vector
;
5183 register struct saved_window
*p
;
5184 register struct window
*w
;
5185 register Lisp_Object tem
;
5187 for (;!NILP (window
); window
= w
->next
)
5189 p
= SAVED_WINDOW_N (vector
, i
);
5190 w
= XWINDOW (window
);
5192 XSETFASTINT (w
->temslot
, i
++);
5194 p
->buffer
= w
->buffer
;
5197 p
->width
= w
->width
;
5198 p
->height
= w
->height
;
5199 p
->hscroll
= w
->hscroll
;
5200 p
->min_hscroll
= w
->min_hscroll
;
5201 p
->display_table
= w
->display_table
;
5202 p
->orig_top
= w
->orig_top
;
5203 p
->orig_height
= w
->orig_height
;
5204 if (!NILP (w
->buffer
))
5206 /* Save w's value of point in the window configuration.
5207 If w is the selected window, then get the value of point
5208 from the buffer; pointm is garbage in the selected window. */
5209 if (EQ (window
, selected_window
))
5211 p
->pointm
= Fmake_marker ();
5212 set_marker_both (p
->pointm
, w
->buffer
,
5213 BUF_PT (XBUFFER (w
->buffer
)),
5214 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5217 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5219 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5220 p
->start_at_line_beg
= w
->start_at_line_beg
;
5222 tem
= XBUFFER (w
->buffer
)->mark
;
5223 p
->mark
= Fcopy_marker (tem
, Qnil
);
5230 p
->start_at_line_beg
= Qnil
;
5233 if (NILP (w
->parent
))
5236 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5241 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5243 if (!NILP (w
->vchild
))
5244 i
= save_window_save (w
->vchild
, vector
, i
);
5245 if (!NILP (w
->hchild
))
5246 i
= save_window_save (w
->hchild
, vector
, i
);
5252 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5253 Scurrent_window_configuration
, 0, 1, 0,
5254 doc
: /* Return an object representing the current window configuration of FRAME.
5255 If FRAME is nil or omitted, use the selected frame.
5256 This describes the number of windows, their sizes and current buffers,
5257 and for each displayed buffer, where display starts, and the positions of
5258 point and mark. An exception is made for point in the current buffer:
5259 its value is -not- saved.
5260 This also records the currently selected frame, and FRAME's focus
5261 redirection (see `redirect-frame-focus'). */)
5265 register Lisp_Object tem
;
5266 register int n_windows
;
5267 register struct save_window_data
*data
;
5268 register struct Lisp_Vector
*vec
;
5273 frame
= selected_frame
;
5274 CHECK_LIVE_FRAME (frame
, 0);
5277 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5278 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
5279 data
= (struct save_window_data
*)vec
;
5281 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5282 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5283 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5284 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5285 data
->selected_frame
= selected_frame
;
5286 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5287 XSETBUFFER (data
->current_buffer
, current_buffer
);
5288 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5289 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5290 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5291 XSETINT (data
->min_height
, window_min_height
);
5292 XSETINT (data
->min_width
, window_min_width
);
5293 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5294 data
->saved_windows
= tem
;
5295 for (i
= 0; i
< n_windows
; i
++)
5296 XVECTOR (tem
)->contents
[i
]
5297 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5298 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5299 XSETWINDOW_CONFIGURATION (tem
, data
);
5303 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5305 doc
: /* Execute body, preserving window sizes and contents.
5306 Restore which buffer appears in which window, where display starts,
5307 and the value of point and mark for each window.
5308 Also restore the choice of selected window.
5309 Also restore which buffer is current.
5310 Does not restore the value of point in current buffer.
5311 usage: (save-window-excursion BODY ...) */)
5315 register Lisp_Object val
;
5316 register int count
= specpdl_ptr
- specpdl
;
5318 record_unwind_protect (Fset_window_configuration
,
5319 Fcurrent_window_configuration (Qnil
));
5320 val
= Fprogn (args
);
5321 return unbind_to (count
, val
);
5325 /***********************************************************************
5327 ***********************************************************************/
5329 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5331 doc
: /* Set width of marginal areas of window WINDOW.
5332 If window is nil, set margins of the currently selected window.
5333 First parameter LEFT-WIDTH specifies the number of character
5334 cells to reserve for the left marginal area. Second parameter
5335 RIGHT-WIDTH does the same for the right marginal area.
5336 A nil width parameter means no margin. */)
5337 (window
, left
, right
)
5338 Lisp_Object window
, left
, right
;
5340 struct window
*w
= decode_window (window
);
5343 CHECK_NUMBER_OR_FLOAT (left
, 1);
5345 CHECK_NUMBER_OR_FLOAT (right
, 2);
5347 /* Check widths < 0 and translate a zero width to nil.
5348 Margins that are too wide have to be checked elsewhere. */
5349 if ((INTEGERP (left
) && XINT (left
) < 0)
5350 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5351 XSETFASTINT (left
, 0);
5352 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5355 if ((INTEGERP (right
) && XINT (right
) < 0)
5356 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5357 XSETFASTINT (right
, 0);
5358 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5361 w
->left_margin_width
= left
;
5362 w
->right_margin_width
= right
;
5364 ++windows_or_buffers_changed
;
5365 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5370 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5372 doc
: /* Get width of marginal areas of window WINDOW.
5373 If WINDOW is omitted or nil, use the currently selected window.
5374 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
5375 If a marginal area does not exist, its width will be returned
5380 struct window
*w
= decode_window (window
);
5381 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5386 /***********************************************************************
5388 ***********************************************************************/
5390 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5391 doc
: /* Return the amount by which WINDOW is scrolled vertically.
5392 Use the selected window if WINDOW is nil or omitted.
5393 Value is a multiple of the canonical character height of WINDOW. */)
5402 window
= selected_window
;
5404 CHECK_WINDOW (window
, 0);
5405 w
= XWINDOW (window
);
5406 f
= XFRAME (w
->frame
);
5408 if (FRAME_WINDOW_P (f
))
5409 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5411 result
= make_number (0);
5416 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5418 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
5419 WINDOW nil or omitted means use the selected window. VSCROLL is a
5420 non-negative multiple of the canonical character height of WINDOW. */)
5422 Lisp_Object window
, vscroll
;
5428 window
= selected_window
;
5430 CHECK_WINDOW (window
, 0);
5431 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5433 w
= XWINDOW (window
);
5434 f
= XFRAME (w
->frame
);
5436 if (FRAME_WINDOW_P (f
))
5438 int old_dy
= w
->vscroll
;
5440 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5441 w
->vscroll
= min (w
->vscroll
, 0);
5443 /* Adjust glyph matrix of the frame if the virtual display
5444 area becomes larger than before. */
5445 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5448 /* Prevent redisplay shortcuts. */
5449 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5452 return Fwindow_vscroll (window
);
5456 /* Call FN for all leaf windows on frame F. FN is called with the
5457 first argument being a pointer to the leaf window, and with
5458 additional argument USER_DATA. Stops when FN returns 0. */
5461 foreach_window (f
, fn
, user_data
)
5463 int (* fn
) P_ ((struct window
*, void *));
5466 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5470 /* Helper function for foreach_window. Call FN for all leaf windows
5471 reachable from W. FN is called with the first argument being a
5472 pointer to the leaf window, and with additional argument USER_DATA.
5473 Stop when FN returns 0. Value is 0 if stopped by FN. */
5476 foreach_window_1 (w
, fn
, user_data
)
5478 int (* fn
) P_ ((struct window
*, void *));
5483 for (cont
= 1; w
&& cont
;)
5485 if (!NILP (w
->hchild
))
5486 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5487 else if (!NILP (w
->vchild
))
5488 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5490 cont
= fn (w
, user_data
);
5492 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5499 /* Freeze or unfreeze the window start of W unless it is a
5500 mini-window or the selected window. FREEZE_P non-null means freeze
5501 the window start. */
5504 freeze_window_start (w
, freeze_p
)
5508 if (w
== XWINDOW (selected_window
)
5509 || MINI_WINDOW_P (w
)
5510 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5511 && ! NILP (Vminibuf_scroll_window
)
5512 && w
== XWINDOW (Vminibuf_scroll_window
)))
5515 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5520 /* Freeze or unfreeze the window starts of all leaf windows on frame
5521 F, except the selected window and a mini-window. FREEZE_P non-zero
5522 means freeze the window start. */
5525 freeze_window_starts (f
, freeze_p
)
5529 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5533 /***********************************************************************
5535 ***********************************************************************/
5537 /* Return 1 if window configurations C1 and C2
5538 describe the same state of affairs. This is used by Fequal. */
5541 compare_window_configurations (c1
, c2
, ignore_positions
)
5543 int ignore_positions
;
5545 register struct save_window_data
*d1
, *d2
;
5546 struct Lisp_Vector
*sw1
, *sw2
;
5549 if (!WINDOW_CONFIGURATIONP (c1
))
5550 wrong_type_argument (Qwindow_configuration_p
, c1
);
5551 if (!WINDOW_CONFIGURATIONP (c2
))
5552 wrong_type_argument (Qwindow_configuration_p
, c2
);
5554 d1
= (struct save_window_data
*) XVECTOR (c1
);
5555 d2
= (struct save_window_data
*) XVECTOR (c2
);
5556 sw1
= XVECTOR (d1
->saved_windows
);
5557 sw2
= XVECTOR (d2
->saved_windows
);
5559 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5561 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5563 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5565 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5567 /* Don't compare the current_window field directly.
5568 Instead see w1_is_current and w2_is_current, below. */
5569 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5571 if (! ignore_positions
)
5572 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5574 /* Don't compare the root_window field.
5575 We don't require the two configurations
5576 to use the same window object,
5577 and the two root windows must be equivalent
5578 if everything else compares equal. */
5579 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5581 if (! EQ (d1
->min_width
, d2
->min_width
))
5583 if (! EQ (d1
->min_height
, d2
->min_height
))
5586 /* Verify that the two confis have the same number of windows. */
5587 if (sw1
->size
!= sw2
->size
)
5590 for (i
= 0; i
< sw1
->size
; i
++)
5592 struct saved_window
*p1
, *p2
;
5593 int w1_is_current
, w2_is_current
;
5595 p1
= SAVED_WINDOW_N (sw1
, i
);
5596 p2
= SAVED_WINDOW_N (sw2
, i
);
5598 /* Verify that the current windows in the two
5599 configurations correspond to each other. */
5600 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5601 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5603 if (w1_is_current
!= w2_is_current
)
5606 /* Verify that the corresponding windows do match. */
5607 if (! EQ (p1
->buffer
, p2
->buffer
))
5609 if (! EQ (p1
->left
, p2
->left
))
5611 if (! EQ (p1
->top
, p2
->top
))
5613 if (! EQ (p1
->width
, p2
->width
))
5615 if (! EQ (p1
->height
, p2
->height
))
5617 if (! EQ (p1
->display_table
, p2
->display_table
))
5619 if (! EQ (p1
->parent
, p2
->parent
))
5621 if (! EQ (p1
->prev
, p2
->prev
))
5623 if (! ignore_positions
)
5625 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5627 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5629 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5631 if (NILP (Fequal (p1
->start
, p2
->start
)))
5633 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5635 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5643 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5644 Scompare_window_configurations
, 2, 2, 0,
5645 doc
: /* Compare two window configurations as regards the structure of windows.
5646 This function ignores details such as the values of point and mark
5647 and scrolling positions. */)
5651 if (compare_window_configurations (x
, y
, 1))
5659 struct frame
*f
= make_terminal_frame ();
5660 XSETFRAME (selected_frame
, f
);
5661 Vterminal_frame
= selected_frame
;
5662 minibuf_window
= f
->minibuffer_window
;
5663 selected_window
= f
->selected_window
;
5664 last_nonminibuf_frame
= f
;
5666 window_initialized
= 1;
5672 Vwindow_list
= Qnil
;
5678 Qleft_fringe
= intern ("left-fringe");
5679 staticpro (&Qleft_fringe
);
5680 Qright_fringe
= intern ("right-fringe");
5681 staticpro (&Qright_fringe
);
5683 Qwindow_size_fixed
= intern ("window-size-fixed");
5684 staticpro (&Qwindow_size_fixed
);
5686 staticpro (&Qwindow_configuration_change_hook
);
5687 Qwindow_configuration_change_hook
5688 = intern ("window-configuration-change-hook");
5690 Qwindowp
= intern ("windowp");
5691 staticpro (&Qwindowp
);
5693 Qwindow_configuration_p
= intern ("window-configuration-p");
5694 staticpro (&Qwindow_configuration_p
);
5696 Qwindow_live_p
= intern ("window-live-p");
5697 staticpro (&Qwindow_live_p
);
5699 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5700 staticpro (&Qtemp_buffer_show_hook
);
5702 staticpro (&Vwindow_list
);
5704 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5705 doc
: /* Non-nil means call as function to display a help buffer.
5706 The function is called with one argument, the buffer to be displayed.
5707 Used by `with-output-to-temp-buffer'.
5708 If this function is used, then it must do the entire job of showing
5709 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
5710 Vtemp_buffer_show_function
= Qnil
;
5712 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5713 doc
: /* If non-nil, function to call to handle `display-buffer'.
5714 It will receive two args, the buffer and a flag which if non-nil means
5715 that the currently selected window is not acceptable.
5716 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
5717 work using this function. */);
5718 Vdisplay_buffer_function
= Qnil
;
5720 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5721 doc
: /* *If non-nil, `display-buffer' should even the window heights.
5722 If nil, `display-buffer' will leave the window configuration alone. */);
5723 Veven_window_heights
= Qt
;
5725 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5726 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
5727 Vminibuf_scroll_window
= Qnil
;
5729 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5730 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
5731 Vother_window_scroll_buffer
= Qnil
;
5733 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5734 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
5737 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5738 doc
: /* *Non-nil means `display-buffer' should reuse frames.
5739 If the buffer in question is already displayed in a frame, raise that frame. */);
5740 display_buffer_reuse_frames
= 0;
5742 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5743 doc
: /* Function to call to handle automatic new frame creation.
5744 It is called with no arguments and should return a newly created frame.
5746 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
5747 where `pop-up-frame-alist' would hold the default frame parameters. */);
5748 Vpop_up_frame_function
= Qnil
;
5750 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5751 doc
: /* *List of buffer names that should have their own special frames.
5752 Displaying a buffer whose name is in this list makes a special frame for it
5753 using `special-display-function'. See also `special-display-regexps'.
5755 An element of the list can be a list instead of just a string.
5756 There are two ways to use a list as an element:
5757 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
5758 In the first case, FRAME-PARAMETERS are used to create the frame.
5759 In the latter case, FUNCTION is called with BUFFER as the first argument,
5760 followed by OTHER-ARGS--it can display BUFFER in any way it likes.
5761 All this is done by the function found in `special-display-function'.
5763 If this variable appears \"not to work\", because you add a name to it
5764 but that buffer still appears in the selected window, look at the
5765 values of `same-window-buffer-names' and `same-window-regexps'.
5766 Those variables take precedence over this one. */);
5767 Vspecial_display_buffer_names
= Qnil
;
5769 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5770 doc
: /* *List of regexps saying which buffers should have their own special frames.
5771 If a buffer name matches one of these regexps, it gets its own frame.
5772 Displaying a buffer whose name is in this list makes a special frame for it
5773 using `special-display-function'.
5775 An element of the list can be a list instead of just a string.
5776 There are two ways to use a list as an element:
5777 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
5778 In the first case, FRAME-PARAMETERS are used to create the frame.
5779 In the latter case, FUNCTION is called with the buffer as first argument,
5780 followed by OTHER-ARGS--it can display the buffer in any way it likes.
5781 All this is done by the function found in `special-display-function'.
5783 If this variable appears \"not to work\", because you add a regexp to it
5784 but the matching buffers still appear in the selected window, look at the
5785 values of `same-window-buffer-names' and `same-window-regexps'.
5786 Those variables take precedence over this one. */);
5787 Vspecial_display_regexps
= Qnil
;
5789 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5790 doc
: /* Function to call to make a new frame for a special buffer.
5791 It is called with two arguments, the buffer and optional buffer specific
5792 data, and should return a window displaying that buffer.
5793 The default value makes a separate frame for the buffer,
5794 using `special-display-frame-alist' to specify the frame parameters.
5796 A buffer is special if its is listed in `special-display-buffer-names'
5797 or matches a regexp in `special-display-regexps'. */);
5798 Vspecial_display_function
= Qnil
;
5800 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5801 doc
: /* *List of buffer names that should appear in the selected window.
5802 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
5803 switches to it in the selected window, rather than making it appear
5804 in some other window.
5806 An element of the list can be a cons cell instead of just a string.
5807 Then the car must be a string, which specifies the buffer name.
5808 This is for compatibility with `special-display-buffer-names';
5809 the cdr of the cons cell is ignored.
5811 See also `same-window-regexps'. */);
5812 Vsame_window_buffer_names
= Qnil
;
5814 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5815 doc
: /* *List of regexps saying which buffers should appear in the selected window.
5816 If a buffer name matches one of these regexps, then displaying it
5817 using `display-buffer' or `pop-to-buffer' switches to it
5818 in the selected window, rather than making it appear in some other window.
5820 An element of the list can be a cons cell instead of just a string.
5821 Then the car must be a string, which specifies the buffer name.
5822 This is for compatibility with `special-display-buffer-names';
5823 the cdr of the cons cell is ignored.
5825 See also `same-window-buffer-names'. */);
5826 Vsame_window_regexps
= Qnil
;
5828 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5829 doc
: /* *Non-nil means display-buffer should make new windows. */);
5832 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5833 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
5834 next_screen_context_lines
= 2;
5836 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5837 doc
: /* *display-buffer would prefer to split the largest window if this large.
5838 If there is only one window, it is split regardless of this value. */);
5839 split_height_threshold
= 500;
5841 DEFVAR_INT ("window-min-height", &window_min_height
,
5842 doc
: /* *Delete any window less than this tall (including its mode line). */);
5843 window_min_height
= 4;
5845 DEFVAR_INT ("window-min-width", &window_min_width
,
5846 doc
: /* *Delete any window less than this wide. */);
5847 window_min_width
= 10;
5849 DEFVAR_LISP ("scroll-preserve-screen-position",
5850 &Vscroll_preserve_screen_position
,
5851 doc
: /* *Non-nil means scroll commands move point to keep its screen line unchanged. */);
5852 Vscroll_preserve_screen_position
= Qnil
;
5854 DEFVAR_LISP ("window-configuration-change-hook",
5855 &Vwindow_configuration_change_hook
,
5856 doc
: /* Functions to call when window configuration changes.
5857 The selected frame is the one whose configuration has changed. */);
5858 Vwindow_configuration_change_hook
= Qnil
;
5860 DEFVAR_BOOL ("window-size-fixed", &window_size_fixed
,
5861 doc
: /* Non-nil in a buffer means windows displaying the buffer are fixed-size.
5862 Emacs won't change the size of any window displaying that buffer,
5863 unless you explicitly change the size, or Emacs has no other choice.
5864 This variable automatically becomes buffer-local when set. */);
5865 Fmake_variable_buffer_local (Qwindow_size_fixed
);
5866 window_size_fixed
= 0;
5868 defsubr (&Sselected_window
);
5869 defsubr (&Sminibuffer_window
);
5870 defsubr (&Swindow_minibuffer_p
);
5871 defsubr (&Swindowp
);
5872 defsubr (&Swindow_live_p
);
5873 defsubr (&Spos_visible_in_window_p
);
5874 defsubr (&Swindow_buffer
);
5875 defsubr (&Swindow_height
);
5876 defsubr (&Swindow_width
);
5877 defsubr (&Swindow_hscroll
);
5878 defsubr (&Sset_window_hscroll
);
5879 defsubr (&Swindow_redisplay_end_trigger
);
5880 defsubr (&Sset_window_redisplay_end_trigger
);
5881 defsubr (&Swindow_edges
);
5882 defsubr (&Scoordinates_in_window_p
);
5883 defsubr (&Swindow_at
);
5884 defsubr (&Swindow_point
);
5885 defsubr (&Swindow_start
);
5886 defsubr (&Swindow_end
);
5887 defsubr (&Sset_window_point
);
5888 defsubr (&Sset_window_start
);
5889 defsubr (&Swindow_dedicated_p
);
5890 defsubr (&Sset_window_dedicated_p
);
5891 defsubr (&Swindow_display_table
);
5892 defsubr (&Sset_window_display_table
);
5893 defsubr (&Snext_window
);
5894 defsubr (&Sprevious_window
);
5895 defsubr (&Sother_window
);
5896 defsubr (&Sget_lru_window
);
5897 defsubr (&Sget_largest_window
);
5898 defsubr (&Sget_buffer_window
);
5899 defsubr (&Sdelete_other_windows
);
5900 defsubr (&Sdelete_windows_on
);
5901 defsubr (&Sreplace_buffer_in_windows
);
5902 defsubr (&Sdelete_window
);
5903 defsubr (&Sset_window_buffer
);
5904 defsubr (&Sselect_window
);
5905 defsubr (&Sspecial_display_p
);
5906 defsubr (&Ssame_window_p
);
5907 defsubr (&Sdisplay_buffer
);
5908 defsubr (&Ssplit_window
);
5909 defsubr (&Senlarge_window
);
5910 defsubr (&Sshrink_window
);
5911 defsubr (&Sscroll_up
);
5912 defsubr (&Sscroll_down
);
5913 defsubr (&Sscroll_left
);
5914 defsubr (&Sscroll_right
);
5915 defsubr (&Sother_window_for_scrolling
);
5916 defsubr (&Sscroll_other_window
);
5917 defsubr (&Srecenter
);
5918 defsubr (&Swindow_text_height
);
5919 defsubr (&Smove_to_window_line
);
5920 defsubr (&Swindow_configuration_p
);
5921 defsubr (&Swindow_configuration_frame
);
5922 defsubr (&Sset_window_configuration
);
5923 defsubr (&Scurrent_window_configuration
);
5924 defsubr (&Ssave_window_excursion
);
5925 defsubr (&Sset_window_margins
);
5926 defsubr (&Swindow_margins
);
5927 defsubr (&Swindow_vscroll
);
5928 defsubr (&Sset_window_vscroll
);
5929 defsubr (&Scompare_window_configurations
);
5930 defsubr (&Swindow_list
);
5936 initial_define_key (control_x_map
, '1', "delete-other-windows");
5937 initial_define_key (control_x_map
, '2', "split-window");
5938 initial_define_key (control_x_map
, '0', "delete-window");
5939 initial_define_key (control_x_map
, 'o', "other-window");
5940 initial_define_key (control_x_map
, '^', "enlarge-window");
5941 initial_define_key (control_x_map
, '<', "scroll-left");
5942 initial_define_key (control_x_map
, '>', "scroll-right");
5944 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5945 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5946 initial_define_key (meta_map
, 'v', "scroll-down");
5948 initial_define_key (global_map
, Ctl('L'), "recenter");
5949 initial_define_key (meta_map
, 'r', "move-to-window-line");