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. */
33 #include "dispextern.h"
34 #include "blockinput.h"
35 #include "intervals.h"
39 #endif /* HAVE_X_WINDOWS */
51 #define max(a, b) ((a) < (b) ? (b) : (a))
54 /* Values returned from coordinates_in_window. */
68 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
69 Lisp_Object Qwindow_size_fixed
, Qleft_fringe
, Qright_fringe
;
70 extern Lisp_Object Qheight
, Qwidth
;
72 static struct window
*decode_window
P_ ((Lisp_Object
));
73 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
74 static int count_windows
P_ ((struct window
*));
75 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
76 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
77 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
78 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
79 static int window_min_size_1
P_ ((struct window
*, int));
80 static int window_min_size
P_ ((struct window
*, int, int, int *));
81 static void size_window
P_ ((Lisp_Object
, int, int, int));
82 static int freeze_window_start
P_ ((struct window
*, void *));
83 static int window_fixed_size_p
P_ ((struct window
*, int, int));
84 static void enlarge_window
P_ ((Lisp_Object
, int, int));
85 static Lisp_Object window_list
P_ ((void));
86 static int add_window_to_list
P_ ((struct window
*, void *));
87 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
89 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
91 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
93 static int foreach_window_1
P_ ((struct window
*,
94 int (* fn
) (struct window
*, void *),
96 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
98 /* The value of `window-size-fixed'. */
100 int window_size_fixed
;
102 /* This is the window in which the terminal's cursor should
103 be left when nothing is being done with it. This must
104 always be a leaf window, and its buffer is selected by
105 the top level editing loop at the end of each command.
107 This value is always the same as
108 FRAME_SELECTED_WINDOW (selected_frame). */
110 Lisp_Object selected_window
;
112 /* A list of all windows for use by next_window and Fwindow_list.
113 Functions creating or deleting windows should invalidate this cache
114 by setting it to nil. */
116 Lisp_Object Vwindow_list
;
118 /* The mini-buffer window of the selected frame.
119 Note that you cannot test for mini-bufferness of an arbitrary window
120 by comparing against this; but you can test for mini-bufferness of
121 the selected window. */
123 Lisp_Object minibuf_window
;
125 /* Non-nil means it is the window for C-M-v to scroll
126 when the mini-buffer is selected. */
128 Lisp_Object Vminibuf_scroll_window
;
130 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
132 Lisp_Object Vother_window_scroll_buffer
;
134 /* Non-nil means it's function to call to display temp buffers. */
136 Lisp_Object Vtemp_buffer_show_function
;
138 /* If a window gets smaller than either of these, it is removed. */
140 int window_min_height
;
141 int window_min_width
;
143 /* Nonzero implies Fdisplay_buffer should create windows. */
147 /* Nonzero implies make new frames for Fdisplay_buffer. */
151 /* Nonzero means reuse existing frames for displaying buffers. */
153 int display_buffer_reuse_frames
;
155 /* Non-nil means use this function instead of default */
157 Lisp_Object Vpop_up_frame_function
;
159 /* Function to call to handle Fdisplay_buffer. */
161 Lisp_Object Vdisplay_buffer_function
;
163 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
165 Lisp_Object Veven_window_heights
;
167 /* List of buffer *names* for buffers that should have their own frames. */
169 Lisp_Object Vspecial_display_buffer_names
;
171 /* List of regexps for buffer names that should have their own frames. */
173 Lisp_Object Vspecial_display_regexps
;
175 /* Function to pop up a special frame. */
177 Lisp_Object Vspecial_display_function
;
179 /* List of buffer *names* for buffers to appear in selected window. */
181 Lisp_Object Vsame_window_buffer_names
;
183 /* List of regexps for buffer names to appear in selected window. */
185 Lisp_Object Vsame_window_regexps
;
187 /* Hook run at end of temp_output_buffer_show. */
189 Lisp_Object Qtemp_buffer_show_hook
;
191 /* Fdisplay_buffer always splits the largest window
192 if that window is more than this high. */
194 int split_height_threshold
;
196 /* Number of lines of continuity in scrolling by screenfuls. */
198 int next_screen_context_lines
;
200 /* Incremented for each window created. */
202 static int sequence_number
;
204 /* Nonzero after init_window_once has finished. */
206 static int window_initialized
;
208 /* Hook to run when window config changes. */
210 Lisp_Object Qwindow_configuration_change_hook
;
211 Lisp_Object Vwindow_configuration_change_hook
;
213 /* Nonzero means scroll commands try to put point
214 at the same screen height as previously. */
216 Lisp_Object Vscroll_preserve_screen_position
;
218 #if 0 /* This isn't used anywhere. */
219 /* Nonzero means we can split a frame even if it is "unsplittable". */
220 static int inhibit_frame_unsplittable
;
223 #define min(a, b) ((a) < (b) ? (a) : (b))
225 extern int scroll_margin
;
227 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
229 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
230 "Returns t if OBJECT is a window.")
234 return WINDOWP (object
) ? Qt
: Qnil
;
237 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
238 "Returns t if OBJECT is a window which is currently visible.")
242 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
249 register struct window
*p
;
251 p
= allocate_window ();
252 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
253 XSETFASTINT (p
->left
, 0);
254 XSETFASTINT (p
->top
, 0);
255 XSETFASTINT (p
->height
, 0);
256 XSETFASTINT (p
->width
, 0);
257 XSETFASTINT (p
->hscroll
, 0);
258 XSETFASTINT (p
->min_hscroll
, 0);
259 p
->orig_top
= p
->orig_height
= Qnil
;
260 p
->start
= Fmake_marker ();
261 p
->pointm
= Fmake_marker ();
262 XSETFASTINT (p
->use_time
, 0);
264 p
->display_table
= Qnil
;
266 p
->pseudo_window_p
= 0;
267 bzero (&p
->cursor
, sizeof (p
->cursor
));
268 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
269 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
270 p
->desired_matrix
= p
->current_matrix
= 0;
271 p
->phys_cursor_type
= -1;
272 p
->must_be_updated_p
= 0;
273 XSETFASTINT (p
->window_end_vpos
, 0);
274 XSETFASTINT (p
->window_end_pos
, 0);
275 p
->window_end_valid
= Qnil
;
278 XSETFASTINT (p
->last_point
, 0);
279 p
->frozen_window_start_p
= 0;
285 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
286 "Return the window that the cursor now appears in and commands apply to.")
289 return selected_window
;
292 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
293 "Return the window used now for minibuffers.\n\
294 If the optional argument FRAME is specified, return the minibuffer window\n\
295 used by that frame.")
300 frame
= selected_frame
;
301 CHECK_LIVE_FRAME (frame
, 0);
302 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
305 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
306 "Returns non-nil if WINDOW is a minibuffer window.")
310 struct window
*w
= decode_window (window
);
311 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
315 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
316 Spos_visible_in_window_p
, 0, 3, 0,
317 "Return t if position POS is currently on the frame in WINDOW.\n\
318 Return nil if that position is scrolled vertically out of view.\n\
319 If a character is only partially visible, nil is returned, unless the\n\
320 optional argument PARTIALLY is non-nil.\n\
321 POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
322 (pos
, window
, partially
)
323 Lisp_Object pos
, window
, partially
;
325 register struct window
*w
;
327 register struct buffer
*buf
;
329 Lisp_Object in_window
;
332 w
= decode_window (window
);
333 buf
= XBUFFER (w
->buffer
);
334 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
338 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
341 else if (w
== XWINDOW (selected_window
))
344 posint
= XMARKER (w
->pointm
)->charpos
;
346 /* If position is above window start, it's not visible. */
347 if (posint
< CHARPOS (top
))
349 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
350 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
351 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
353 /* If frame is up-to-date, and POSINT is < window end pos, use
354 that info. This doesn't work for POSINT == end pos, because
355 the window end pos is actually the position _after_ the last
356 char in the window. */
357 if (NILP (partially
))
359 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
360 in_window
= fully_p
? Qt
: Qnil
;
365 else if (posint
> BUF_ZV (buf
))
367 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
368 /* If window start is out of range, do something reasonable. */
372 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
373 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
382 static struct window
*
383 decode_window (window
)
384 register Lisp_Object window
;
387 return XWINDOW (selected_window
);
389 CHECK_LIVE_WINDOW (window
, 0);
390 return XWINDOW (window
);
393 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
394 "Return the buffer that WINDOW is displaying.")
398 return decode_window (window
)->buffer
;
401 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
402 "Return the number of lines in WINDOW (including its mode line).")
406 return decode_window (window
)->height
;
409 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
410 "Return the number of display columns in WINDOW.\n\
411 This is the width that is usable columns available for text in WINDOW.\n\
412 If you want to find out how many columns WINDOW takes up,\n\
413 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
417 return make_number (window_internal_width (decode_window (window
)));
420 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
421 "Return the number of columns by which WINDOW is scrolled from left margin.")
425 return decode_window (window
)->hscroll
;
428 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
429 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
430 NCOL should be zero or positive.")
432 Lisp_Object window
, ncol
;
434 struct window
*w
= decode_window (window
);
437 CHECK_NUMBER (ncol
, 1);
438 hscroll
= max (0, XINT (ncol
));
440 /* Prevent redisplay shortcuts when changing the hscroll. */
441 if (XINT (w
->hscroll
) != hscroll
)
442 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
444 w
->hscroll
= make_number (hscroll
);
448 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
449 Swindow_redisplay_end_trigger
, 0, 1, 0,
450 "Return WINDOW's redisplay end trigger value.\n\
451 See `set-window-redisplay-end-trigger' for more information.")
455 return decode_window (window
)->redisplay_end_trigger
;
458 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
459 Sset_window_redisplay_end_trigger
, 2, 2, 0,
460 "Set WINDOW's redisplay end trigger value to VALUE.\n\
461 VALUE should be a buffer position (typically a marker) or nil.\n\
462 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
463 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
464 with two arguments: WINDOW, and the end trigger value.\n\
465 Afterwards the end-trigger value is reset to nil.")
467 register Lisp_Object window
, value
;
469 register struct window
*w
;
471 w
= decode_window (window
);
472 w
->redisplay_end_trigger
= value
;
476 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
477 "Return a list of the edge coordinates of WINDOW.\n\
478 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
479 RIGHT is one more than the rightmost column used by WINDOW,\n\
480 and BOTTOM is one more than the bottommost row used by WINDOW\n\
485 register struct window
*w
= decode_window (window
);
487 return Fcons (w
->left
, Fcons (w
->top
,
488 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
489 Fcons (make_number (XFASTINT (w
->top
)
490 + XFASTINT (w
->height
)),
494 /* Test if the character at column *X, row *Y is within window W.
495 If it is not, return 0;
496 if it is in the window's text area,
497 set *x and *y to its location relative to the upper left corner
500 if it is on the window's modeline, return 2;
501 if it is on the border between the window and its right sibling,
503 if it is on the window's top line, return 4;
504 if it is in the bitmap area to the left/right of the window,
505 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
507 X and Y are frame relative pixel coordinates. */
509 static enum window_part
510 coordinates_in_window (w
, x
, y
)
511 register struct window
*w
;
514 /* Let's make this a global enum later, instead of using numbers
516 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
517 int left_x
, right_x
, top_y
, bottom_y
;
518 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
519 enum window_part part
;
520 int ux
= CANON_X_UNIT (f
), uy
= CANON_Y_UNIT (f
);
521 int x0
= XFASTINT (w
->left
) * ux
;
522 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
523 /* The width of the area where the vertical line can be dragged.
524 (Between mode lines for instance. */
525 int grabbable_width
= ux
;
527 if (*x
< x0
|| *x
>= x1
)
530 /* In what's below, we subtract 1 when computing right_x because we
531 want the rightmost pixel, which is given by left_pixel+width-1. */
532 if (w
->pseudo_window_p
)
535 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
536 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
537 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
541 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
542 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
543 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
544 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
545 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
546 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
549 /* On the mode line or header line? If it's near the start of
550 the mode or header line of window that's has a horizontal
551 sibling, say it's on the vertical line. That's to be able
552 to resize windows horizontally in case we're using toolkit
555 if (WINDOW_WANTS_MODELINE_P (w
)
556 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
559 /* We're somewhere on the mode line. We consider the place
560 between mode lines of horizontally adjacent mode lines
561 as the vertical border. If scroll bars on the left,
562 return the right window. */
565 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
567 if (abs (*x
- x0
) < grabbable_width
)
568 part
= ON_VERTICAL_BORDER
;
570 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
571 part
= ON_VERTICAL_BORDER
;
573 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
574 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
577 part
= ON_HEADER_LINE
;
579 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
581 if (abs (*x
- x0
) < grabbable_width
)
582 part
= ON_VERTICAL_BORDER
;
584 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
585 part
= ON_VERTICAL_BORDER
;
587 /* Outside anything interesting? */
592 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
595 + FRAME_RIGHT_SCROLL_BAR_WIDTH (f
) * ux
))
599 else if (FRAME_WINDOW_P (f
))
601 if (!w
->pseudo_window_p
602 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
603 && !WINDOW_RIGHTMOST_P (w
)
604 && (abs (*x
- right_x
- flags_area_width
) < grabbable_width
))
606 part
= ON_VERTICAL_BORDER
;
608 else if (*x
< left_x
|| *x
> right_x
)
610 /* Other lines than the mode line don't include flags areas and
611 scroll bars on the left. */
613 /* Convert X and Y to window-relative pixel coordinates. */
616 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
627 /* Need to say "*x > right_x" rather than >=, since on character
628 terminals, the vertical line's x coordinate is right_x. */
629 if (*x
< left_x
|| *x
> right_x
)
631 /* Other lines than the mode line don't include flags areas and
632 scroll bars on the left. */
634 /* Convert X and Y to window-relative pixel coordinates. */
637 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
639 /* Here, too, "*x > right_x" is because of character terminals. */
640 else if (!w
->pseudo_window_p
641 && !WINDOW_RIGHTMOST_P (w
)
642 && *x
> right_x
- ux
)
644 /* On the border on the right side of the window? Assume that
645 this area begins at RIGHT_X minus a canonical char width. */
646 part
= ON_VERTICAL_BORDER
;
650 /* Convert X and Y to window-relative pixel coordinates. */
661 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
662 Scoordinates_in_window_p
, 2, 2, 0,
663 "Return non-nil if COORDINATES are in WINDOW.\n\
664 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
665 measured in characters from the upper-left corner of the frame.\n\
666 \(0 . 0) denotes the character in the upper left corner of the\n\
668 If COORDINATES are in the text portion of WINDOW,\n\
669 the coordinates relative to the window are returned.\n\
670 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
671 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
672 If they are in the fringe to the left of the window,\n\
673 `left-fringe' is returned, if they are in the area on the right of\n\
674 the window, `right-fringe' is returned.\n\
675 If they are on the border between WINDOW and its right sibling,\n\
676 `vertical-line' is returned.")
677 (coordinates
, window
)
678 register Lisp_Object coordinates
, window
;
685 CHECK_LIVE_WINDOW (window
, 0);
686 w
= XWINDOW (window
);
687 f
= XFRAME (w
->frame
);
688 CHECK_CONS (coordinates
, 1);
689 lx
= Fcar (coordinates
);
690 ly
= Fcdr (coordinates
);
691 CHECK_NUMBER_OR_FLOAT (lx
, 1);
692 CHECK_NUMBER_OR_FLOAT (ly
, 1);
693 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
694 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
696 switch (coordinates_in_window (w
, &x
, &y
))
702 /* X and Y are now window relative pixel coordinates. Convert
703 them to canonical char units before returning them. */
704 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
705 CANON_Y_FROM_PIXEL_Y (f
, y
));
710 case ON_VERTICAL_BORDER
:
711 return Qvertical_line
;
719 case ON_RIGHT_FRINGE
:
720 return Qright_fringe
;
728 /* Callback for foreach_window, used in window_from_coordinates.
729 Check if window W contains coordinates specified by USER_DATA which
730 is actually a pointer to a struct check_window_data CW.
732 Check if window W contains coordinates *CW->x and *CW->y. If it
733 does, return W in *CW->window, as Lisp_Object, and return in
734 *CW->part the part of the window under coordinates *X,*Y. Return
735 zero from this function to stop iterating over windows. */
737 struct check_window_data
744 check_window_containing (w
, user_data
)
748 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
749 enum window_part found
;
752 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
753 if (found
!= ON_NOTHING
)
755 *cw
->part
= found
- 1;
756 XSETWINDOW (*cw
->window
, w
);
764 /* Find the window containing frame-relative pixel position X/Y and
765 return it as a Lisp_Object. If X, Y is on the window's modeline,
766 set *PART to 1; if it is on the separating line between the window
767 and its right sibling, set it to 2; otherwise set it to 0. If
768 there is no window under X, Y return nil and leave *PART
769 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
771 This function was previously implemented with a loop cycling over
772 windows with Fnext_window, and starting with the frame's selected
773 window. It turned out that this doesn't work with an
774 implementation of next_window using Vwindow_list, because
775 FRAME_SELECTED_WINDOW (F) is not always contained in the window
776 tree of F when this function is called asynchronously from
777 note_mouse_highlight. The original loop didn't terminate in this
781 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
788 struct check_window_data cw
;
791 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
792 foreach_window (f
, check_window_containing
, &cw
);
794 /* If not found above, see if it's in the tool bar window, if a tool
798 && WINDOWP (f
->tool_bar_window
)
799 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
800 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
804 window
= f
->tool_bar_window
;
810 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
811 "Return window containing coordinates X and Y on FRAME.\n\
812 If omitted, FRAME defaults to the currently selected frame.\n\
813 The top left corner of the frame is considered to be row 0,\n\
816 Lisp_Object x
, y
, frame
;
822 frame
= selected_frame
;
823 CHECK_LIVE_FRAME (frame
, 2);
826 /* Check that arguments are integers or floats. */
827 CHECK_NUMBER_OR_FLOAT (x
, 0);
828 CHECK_NUMBER_OR_FLOAT (y
, 1);
830 return window_from_coordinates (f
,
831 PIXEL_X_FROM_CANON_X (f
, x
),
832 PIXEL_Y_FROM_CANON_Y (f
, y
),
836 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
837 "Return current value of point in WINDOW.\n\
838 For a nonselected window, this is the value point would have\n\
839 if that window were selected.\n\
841 Note that, when WINDOW is the selected window and its buffer\n\
842 is also currently selected, the value returned is the same as (point).\n\
843 It would be more strictly correct to return the `top-level' value\n\
844 of point, outside of any save-excursion forms.\n\
845 But that is hard to define.")
849 register struct window
*w
= decode_window (window
);
851 if (w
== XWINDOW (selected_window
)
852 && current_buffer
== XBUFFER (w
->buffer
))
854 return Fmarker_position (w
->pointm
);
857 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
858 "Return position at which display currently starts in WINDOW.\n\
859 This is updated by redisplay or by calling `set-window-start'.")
863 return Fmarker_position (decode_window (window
)->start
);
866 /* This is text temporarily removed from the doc string below.
868 This function returns nil if the position is not currently known.\n\
869 That happens when redisplay is preempted and doesn't finish.\n\
870 If in that case you want to compute where the end of the window would\n\
871 have been if redisplay had finished, do this:\n\
873 (goto-char (window-start window))\n\
874 (vertical-motion (1- (window-height window)) window)\n\
877 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
878 "Return position at which display currently ends in WINDOW.\n\
879 This is updated by redisplay, when it runs to completion.\n\
880 Simply changing the buffer text or setting `window-start'\n\
881 does not update this value.\n\
882 If UPDATE is non-nil, compute the up-to-date position\n\
883 if it isn't already recorded.")
885 Lisp_Object window
, update
;
888 struct window
*w
= decode_window (window
);
892 CHECK_BUFFER (buf
, 0);
894 #if 0 /* This change broke some things. We should make it later. */
895 /* If we don't know the end position, return nil.
896 The user can compute it with vertical-motion if he wants to.
897 It would be nicer to do it automatically,
898 but that's so slow that it would probably bother people. */
899 if (NILP (w
->window_end_valid
))
904 && ! (! NILP (w
->window_end_valid
)
905 && XFASTINT (w
->last_modified
) >= MODIFF
))
907 struct text_pos startp
;
909 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
911 /* In case W->start is out of the range, use something
912 reasonable. This situation occured when loading a file with
913 `-l' containing a call to `rmail' with subsequent other
914 commands. At the end, W->start happened to be BEG, while
915 rmail had already narrowed the buffer. */
916 if (XMARKER (w
->start
)->charpos
< BEGV
)
917 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
918 else if (XMARKER (w
->start
)->charpos
> ZV
)
919 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
921 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
923 /* Cannot use Fvertical_motion because that function doesn't
924 cope with variable-height lines. */
925 if (b
!= current_buffer
)
927 old_buffer
= current_buffer
;
928 set_buffer_internal (b
);
931 start_display (&it
, w
, startp
);
932 move_it_vertically (&it
, window_box_height (w
));
933 if (it
.current_y
< it
.last_visible_y
)
934 move_it_past_eol (&it
);
935 value
= make_number (IT_CHARPOS (it
));
938 set_buffer_internal (old_buffer
);
941 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
946 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
947 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
949 Lisp_Object window
, pos
;
951 register struct window
*w
= decode_window (window
);
953 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
954 if (w
== XWINDOW (selected_window
)
955 && XBUFFER (w
->buffer
) == current_buffer
)
958 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
960 /* We have to make sure that redisplay updates the window to show
961 the new value of point. */
962 if (!EQ (window
, selected_window
))
963 ++windows_or_buffers_changed
;
968 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
969 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
970 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
971 from overriding motion of point in order to display at this exact start.")
972 (window
, pos
, noforce
)
973 Lisp_Object window
, pos
, noforce
;
975 register struct window
*w
= decode_window (window
);
977 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
978 set_marker_restricted (w
->start
, pos
, w
->buffer
);
979 /* this is not right, but much easier than doing what is right. */
980 w
->start_at_line_beg
= Qnil
;
983 w
->update_mode_line
= Qt
;
984 XSETFASTINT (w
->last_modified
, 0);
985 XSETFASTINT (w
->last_overlay_modified
, 0);
986 if (!EQ (window
, selected_window
))
987 windows_or_buffers_changed
++;
992 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
994 "Return WINDOW's dedicated object, usually t or nil.\n\
995 See also `set-window-dedicated-p'.")
999 return decode_window (window
)->dedicated
;
1002 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1003 Sset_window_dedicated_p
, 2, 2, 0,
1004 "Control whether WINDOW is dedicated to the buffer it displays.\n\
1005 If it is dedicated, Emacs will not automatically change\n\
1006 which buffer appears in it.\n\
1007 The second argument is the new value for the dedication flag;\n\
1008 non-nil means yes.")
1010 Lisp_Object window
, arg
;
1012 register struct window
*w
= decode_window (window
);
1015 w
->dedicated
= Qnil
;
1019 return w
->dedicated
;
1022 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1024 "Return the display-table that WINDOW is using.")
1028 return decode_window (window
)->display_table
;
1031 /* Get the display table for use on window W. This is either W's
1032 display table or W's buffer's display table. Ignore the specified
1033 tables if they are not valid; if no valid table is specified,
1036 struct Lisp_Char_Table
*
1037 window_display_table (w
)
1040 struct Lisp_Char_Table
*dp
= NULL
;
1042 if (DISP_TABLE_P (w
->display_table
))
1043 dp
= XCHAR_TABLE (w
->display_table
);
1044 else if (BUFFERP (w
->buffer
))
1046 struct buffer
*b
= XBUFFER (w
->buffer
);
1048 if (DISP_TABLE_P (b
->display_table
))
1049 dp
= XCHAR_TABLE (b
->display_table
);
1050 else if (DISP_TABLE_P (Vstandard_display_table
))
1051 dp
= XCHAR_TABLE (Vstandard_display_table
);
1057 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1058 "Set WINDOW's display-table to TABLE.")
1060 register Lisp_Object window
, table
;
1062 register struct window
*w
;
1064 w
= decode_window (window
);
1065 w
->display_table
= table
;
1069 /* Record info on buffer window w is displaying
1070 when it is about to cease to display that buffer. */
1073 register struct window
*w
;
1080 if (b
!= XMARKER (w
->pointm
)->buffer
)
1084 if (w
== XWINDOW (selected_window
)
1085 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1086 /* Do this except when the selected window's buffer
1087 is being removed from some other window. */
1089 /* last_window_start records the start position that this buffer
1090 had in the last window to be disconnected from it.
1091 Now that this statement is unconditional,
1092 it is possible for the buffer to be displayed in the
1093 selected window, while last_window_start reflects another
1094 window which was recently showing the same buffer.
1095 Some people might say that might be a good thing. Let's see. */
1096 b
->last_window_start
= marker_position (w
->start
);
1098 /* Point in the selected window's buffer
1099 is actually stored in that buffer, and the window's pointm isn't used.
1100 So don't clobber point in that buffer. */
1101 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1102 /* This line helps to fix Horsley's testbug.el bug. */
1103 && !(WINDOWP (b
->last_selected_window
)
1104 && w
!= XWINDOW (b
->last_selected_window
)
1105 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1106 temp_set_point_both (b
,
1107 clip_to_bounds (BUF_BEGV (b
),
1108 XMARKER (w
->pointm
)->charpos
,
1110 clip_to_bounds (BUF_BEGV_BYTE (b
),
1111 marker_byte_position (w
->pointm
),
1114 if (WINDOWP (b
->last_selected_window
)
1115 && w
== XWINDOW (b
->last_selected_window
))
1116 b
->last_selected_window
= Qnil
;
1119 /* Put replacement into the window structure in place of old. */
1121 replace_window (old
, replacement
)
1122 Lisp_Object old
, replacement
;
1124 register Lisp_Object tem
;
1125 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1127 /* If OLD is its frame's root_window, then replacement is the new
1128 root_window for that frame. */
1130 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1131 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1135 p
->width
= o
->width
;
1136 p
->height
= o
->height
;
1137 p
->desired_matrix
= p
->current_matrix
= 0;
1139 bzero (&p
->cursor
, sizeof (p
->cursor
));
1140 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1141 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1142 p
->phys_cursor_type
= -1;
1143 p
->must_be_updated_p
= 0;
1144 p
->pseudo_window_p
= 0;
1145 XSETFASTINT (p
->window_end_vpos
, 0);
1146 XSETFASTINT (p
->window_end_pos
, 0);
1147 p
->window_end_valid
= Qnil
;
1148 p
->frozen_window_start_p
= 0;
1149 p
->orig_top
= p
->orig_height
= Qnil
;
1151 p
->next
= tem
= o
->next
;
1153 XWINDOW (tem
)->prev
= replacement
;
1155 p
->prev
= tem
= o
->prev
;
1157 XWINDOW (tem
)->next
= replacement
;
1159 p
->parent
= tem
= o
->parent
;
1162 if (EQ (XWINDOW (tem
)->vchild
, old
))
1163 XWINDOW (tem
)->vchild
= replacement
;
1164 if (EQ (XWINDOW (tem
)->hchild
, old
))
1165 XWINDOW (tem
)->hchild
= replacement
;
1168 /*** Here, if replacement is a vertical combination
1169 and so is its new parent, we should make replacement's
1170 children be children of that parent instead. ***/
1173 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1174 "Remove WINDOW from the display. Default is selected window.")
1176 register Lisp_Object window
;
1178 delete_window (window
);
1180 if (! NILP (Vwindow_configuration_change_hook
)
1181 && ! NILP (Vrun_hooks
))
1182 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1188 delete_window (window
)
1189 register Lisp_Object window
;
1191 register Lisp_Object tem
, parent
, sib
;
1192 register struct window
*p
;
1193 register struct window
*par
;
1196 /* Because this function is called by other C code on non-leaf
1197 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1198 so we can't decode_window here. */
1200 window
= selected_window
;
1202 CHECK_WINDOW (window
, 0);
1203 p
= XWINDOW (window
);
1205 /* It's okay to delete an already-deleted window. */
1206 if (NILP (p
->buffer
)
1208 && NILP (p
->vchild
))
1213 error ("Attempt to delete minibuffer or sole ordinary window");
1214 par
= XWINDOW (parent
);
1216 windows_or_buffers_changed
++;
1217 Vwindow_list
= Qnil
;
1218 f
= XFRAME (WINDOW_FRAME (p
));
1219 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1221 /* Are we trying to delete any frame's selected window? */
1223 Lisp_Object pwindow
;
1225 /* See if the frame's selected window is either WINDOW
1226 or any subwindow of it, by finding all that window's parents
1227 and comparing each one with WINDOW. */
1228 pwindow
= FRAME_SELECTED_WINDOW (f
);
1230 while (!NILP (pwindow
))
1232 if (EQ (window
, pwindow
))
1234 pwindow
= XWINDOW (pwindow
)->parent
;
1237 if (EQ (window
, pwindow
))
1239 Lisp_Object alternative
;
1240 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1242 /* If we're about to delete the selected window on the
1243 selected frame, then we should use Fselect_window to select
1244 the new window. On the other hand, if we're about to
1245 delete the selected window on any other frame, we shouldn't do
1246 anything but set the frame's selected_window slot. */
1247 if (EQ (window
, selected_window
))
1248 Fselect_window (alternative
);
1250 FRAME_SELECTED_WINDOW (f
) = alternative
;
1255 /* tem is null for dummy parent windows
1256 (which have inferiors but not any contents themselves) */
1260 unchain_marker (p
->pointm
);
1261 unchain_marker (p
->start
);
1264 /* Free window glyph matrices. It is sure that they are allocated
1265 again when ADJUST_GLYPHS is called. Block input so that expose
1266 events and other events that access glyph matrices are not
1267 processed while we are changing them. */
1269 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1273 XWINDOW (tem
)->prev
= p
->prev
;
1277 XWINDOW (tem
)->next
= p
->next
;
1279 if (EQ (window
, par
->hchild
))
1280 par
->hchild
= p
->next
;
1281 if (EQ (window
, par
->vchild
))
1282 par
->vchild
= p
->next
;
1284 /* Find one of our siblings to give our space to. */
1288 /* If p gives its space to its next sibling, that sibling needs
1289 to have its top/left side pulled back to where p's is.
1290 set_window_{height,width} will re-position the sibling's
1293 XWINDOW (sib
)->top
= p
->top
;
1294 XWINDOW (sib
)->left
= p
->left
;
1297 /* Stretch that sibling. */
1298 if (!NILP (par
->vchild
))
1299 set_window_height (sib
,
1300 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1302 if (!NILP (par
->hchild
))
1303 set_window_width (sib
,
1304 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1307 /* If parent now has only one child,
1308 put the child into the parent's place. */
1312 if (NILP (XWINDOW (tem
)->next
))
1313 replace_window (parent
, tem
);
1315 /* Since we may be deleting combination windows, we must make sure that
1316 not only p but all its children have been marked as deleted. */
1317 if (! NILP (p
->hchild
))
1318 delete_all_subwindows (XWINDOW (p
->hchild
));
1319 else if (! NILP (p
->vchild
))
1320 delete_all_subwindows (XWINDOW (p
->vchild
));
1322 /* Mark this window as deleted. */
1323 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1325 /* Adjust glyph matrices. */
1332 /***********************************************************************
1334 ***********************************************************************/
1336 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1337 pointer. This is a callback function for foreach_window, used in
1338 function window_list. */
1341 add_window_to_list (w
, user_data
)
1345 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1347 XSETWINDOW (window
, w
);
1348 *list
= Fcons (window
, *list
);
1353 /* Return a list of all windows, for use by next_window. If
1354 Vwindow_list is a list, return that list. Otherwise, build a new
1355 list, cache it in Vwindow_list, and return that. */
1360 if (!CONSP (Vwindow_list
))
1364 Vwindow_list
= Qnil
;
1365 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1367 Lisp_Object args
[2];
1369 /* We are visiting windows in canonical order, and add
1370 new windows at the front of args[1], which means we
1371 have to reverse this list at the end. */
1373 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1374 args
[0] = Vwindow_list
;
1375 args
[1] = Fnreverse (args
[1]);
1376 Vwindow_list
= Fnconc (2, args
);
1380 return Vwindow_list
;
1384 /* Value is non-zero if WINDOW satisfies the constraints given by
1385 OWINDOW, MINIBUF and ALL_FRAMES.
1387 MINIBUF t means WINDOW may be minibuffer windows.
1388 `lambda' means WINDOW may not be a minibuffer window.
1389 a window means a specific minibuffer window
1391 ALL_FRAMES t means search all frames,
1392 nil means search just current frame,
1393 `visible' means search just visible frames,
1394 0 means search visible and iconified frames,
1395 a window means search the frame that window belongs to,
1396 a frame means consider windows on that frame, only. */
1399 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1400 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1402 struct window
*w
= XWINDOW (window
);
1403 struct frame
*f
= XFRAME (w
->frame
);
1404 int candidate_p
= 1;
1406 if (!BUFFERP (w
->buffer
))
1408 else if (MINI_WINDOW_P (w
)
1409 && (EQ (minibuf
, Qlambda
)
1410 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1412 /* If MINIBUF is `lambda' don't consider any mini-windows.
1413 If it is a window, consider only that one. */
1416 else if (EQ (all_frames
, Qt
))
1418 else if (NILP (all_frames
))
1420 xassert (WINDOWP (owindow
));
1421 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1423 else if (EQ (all_frames
, Qvisible
))
1425 FRAME_SAMPLE_VISIBILITY (f
);
1426 candidate_p
= FRAME_VISIBLE_P (f
);
1428 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1430 FRAME_SAMPLE_VISIBILITY (f
);
1431 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1433 else if (WINDOWP (all_frames
))
1434 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1435 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1436 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1437 else if (FRAMEP (all_frames
))
1438 candidate_p
= EQ (all_frames
, w
->frame
);
1444 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1445 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1449 decode_next_window_args (window
, minibuf
, all_frames
)
1450 Lisp_Object
*window
, *minibuf
, *all_frames
;
1453 *window
= selected_window
;
1455 CHECK_LIVE_WINDOW (*window
, 0);
1457 /* MINIBUF nil may or may not include minibuffers. Decide if it
1459 if (NILP (*minibuf
))
1460 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1461 else if (!EQ (*minibuf
, Qt
))
1464 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1465 => count none of them, or a specific minibuffer window (the
1466 active one) to count. */
1468 /* ALL_FRAMES nil doesn't specify which frames to include. */
1469 if (NILP (*all_frames
))
1470 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1471 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1473 else if (EQ (*all_frames
, Qvisible
))
1475 else if (XFASTINT (*all_frames
) == 0)
1477 else if (FRAMEP (*all_frames
))
1479 else if (!EQ (*all_frames
, Qt
))
1482 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1483 search just current frame, `visible' meaning search just visible
1484 frames, 0 meaning search visible and iconified frames, or a
1485 window, meaning search the frame that window belongs to, or a
1486 frame, meaning consider windows on that frame, only. */
1490 /* Return the next or previous window of WINDOW in canonical ordering
1491 of windows. NEXT_P non-zero means return the next window. See the
1492 documentation string of next-window for the meaning of MINIBUF and
1496 next_window (window
, minibuf
, all_frames
, next_p
)
1497 Lisp_Object window
, minibuf
, all_frames
;
1500 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1502 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1503 return the first window on the frame. */
1504 if (FRAMEP (all_frames
)
1505 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1506 return Fframe_first_window (all_frames
);
1512 /* Find WINDOW in the list of all windows. */
1513 list
= Fmemq (window
, window_list ());
1515 /* Scan forward from WINDOW to the end of the window list. */
1517 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1518 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1521 /* Scan from the start of the window list up to WINDOW. */
1523 for (list
= Vwindow_list
;
1524 CONSP (list
) && !EQ (XCAR (list
), window
);
1526 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1530 window
= XCAR (list
);
1534 Lisp_Object candidate
, list
;
1536 /* Scan through the list of windows for candidates. If there are
1537 candidate windows in front of WINDOW, the last one of these
1538 is the one we want. If there are candidates following WINDOW
1539 in the list, again the last one of these is the one we want. */
1541 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1543 if (EQ (XCAR (list
), window
))
1545 if (WINDOWP (candidate
))
1548 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1550 candidate
= XCAR (list
);
1553 if (WINDOWP (candidate
))
1561 /* This comment supplies the doc string for `next-window',
1562 for make-docfile to see. We cannot put this in the real DEFUN
1563 due to limits in the Unix cpp.
1565 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1566 "Return next window after WINDOW in canonical ordering of windows.\n\
1567 If omitted, WINDOW defaults to the selected window.\n\
1569 Optional second arg MINIBUF t means count the minibuffer window even\n\
1570 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1571 it is active. MINIBUF neither t nor nil means not to count the\n\
1572 minibuffer even if it is active.\n\
1574 Several frames may share a single minibuffer; if the minibuffer\n\
1575 counts, all windows on all frames that share that minibuffer count\n\
1576 too. Therefore, `next-window' can be used to iterate through the\n\
1577 set of windows even when the minibuffer is on another frame. If the\n\
1578 minibuffer does not count, only windows from WINDOW's frame count.\n\
1580 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1581 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1582 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1583 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1584 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1585 Anything else means restrict to WINDOW's frame.\n\
1587 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1588 `next-window' to iterate through the entire cycle of acceptable\n\
1589 windows, eventually ending up back at the window you started with.\n\
1590 `previous-window' traverses the same cycle, in the reverse order.")
1591 (window, minibuf, all_frames) */
1593 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1595 (window
, minibuf
, all_frames
)
1596 Lisp_Object window
, minibuf
, all_frames
;
1598 return next_window (window
, minibuf
, all_frames
, 1);
1602 /* This comment supplies the doc string for `previous-window',
1603 for make-docfile to see. We cannot put this in the real DEFUN
1604 due to limits in the Unix cpp.
1606 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1607 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1608 If omitted, WINDOW defaults to the selected window.\n\
1610 Optional second arg MINIBUF t means count the minibuffer window even\n\
1611 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1612 it is active. MINIBUF neither t nor nil means not to count the\n\
1613 minibuffer even if it is active.\n\
1615 Several frames may share a single minibuffer; if the minibuffer\n\
1616 counts, all windows on all frames that share that minibuffer count\n\
1617 too. Therefore, `previous-window' can be used to iterate through\n\
1618 the set of windows even when the minibuffer is on another frame. If\n\
1619 the minibuffer does not count, only windows from WINDOW's frame count\n\
1621 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1622 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1623 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1624 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1625 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1626 Anything else means restrict to WINDOW's frame.\n\
1628 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1629 `previous-window' to iterate through the entire cycle of acceptable\n\
1630 windows, eventually ending up back at the window you started with.\n\
1631 `next-window' traverses the same cycle, in the reverse order.")
1632 (window, minibuf, all_frames) */
1635 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1637 (window
, minibuf
, all_frames
)
1638 Lisp_Object window
, minibuf
, all_frames
;
1640 return next_window (window
, minibuf
, all_frames
, 0);
1644 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1645 "Select the ARG'th different window on this frame.\n\
1646 All windows on current frame are arranged in a cyclic order.\n\
1647 This command selects the window ARG steps away in that order.\n\
1648 A negative ARG moves in the opposite order. If the optional second\n\
1649 argument ALL_FRAMES is non-nil, cycle through all frames.")
1651 Lisp_Object arg
, all_frames
;
1656 CHECK_NUMBER (arg
, 0);
1657 window
= selected_window
;
1659 for (i
= XINT (arg
); i
> 0; --i
)
1660 window
= Fnext_window (window
, Qnil
, all_frames
);
1662 window
= Fprevious_window (window
, Qnil
, all_frames
);
1664 Fselect_window (window
);
1669 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1670 "Return a list of windows on FRAME, starting with WINDOW.\n\
1671 FRAME nil or omitted means use the selected frame.\n\
1672 WINDOW nil or omitted means use the selected window.\n\
1673 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1674 MINIBUF nil or omitted means include the minibuffer window only\n\
1676 MINIBUF neither nil nor t means never include the minibuffer window.")
1677 (frame
, minibuf
, window
)
1678 Lisp_Object frame
, minibuf
, window
;
1681 window
= selected_window
;
1683 frame
= selected_frame
;
1685 if (!EQ (frame
, XWINDOW (window
)->frame
))
1686 error ("Window is on a different frame");
1688 return window_list_1 (window
, minibuf
, frame
);
1692 /* Return a list of windows in canonical ordering. Arguments are like
1693 for `next-window'. */
1696 window_list_1 (window
, minibuf
, all_frames
)
1697 Lisp_Object window
, minibuf
, all_frames
;
1699 Lisp_Object tail
, list
;
1701 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1704 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1705 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1706 list
= Fcons (XCAR (tail
), list
);
1708 return Fnreverse (list
);
1713 /* Look at all windows, performing an operation specified by TYPE
1715 If FRAMES is Qt, look at all frames;
1716 Qnil, look at just the selected frame;
1717 Qvisible, look at visible frames;
1718 a frame, just look at windows on that frame.
1719 If MINI is non-zero, perform the operation on minibuffer windows too. */
1724 GET_BUFFER_WINDOW
, /* Arg is buffer */
1725 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1726 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1727 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1729 UNSHOW_BUFFER
, /* Arg is buffer */
1734 window_loop (type
, obj
, mini
, frames
)
1735 enum window_loop type
;
1736 Lisp_Object obj
, frames
;
1739 Lisp_Object window
, windows
, best_window
, frame_arg
;
1741 struct gcpro gcpro1
;
1743 /* If we're only looping through windows on a particular frame,
1744 frame points to that frame. If we're looping through windows
1745 on all frames, frame is 0. */
1746 if (FRAMEP (frames
))
1747 f
= XFRAME (frames
);
1748 else if (NILP (frames
))
1749 f
= SELECTED_FRAME ();
1754 frame_arg
= Qlambda
;
1755 else if (XFASTINT (frames
) == 0)
1757 else if (EQ (frames
, Qvisible
))
1762 /* frame_arg is Qlambda to stick to one frame,
1763 Qvisible to consider all visible frames,
1766 /* Pick a window to start with. */
1770 window
= FRAME_SELECTED_WINDOW (f
);
1772 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1774 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1778 for (; CONSP (windows
); windows
= CDR (windows
))
1782 window
= XCAR (windows
);
1783 w
= XWINDOW (window
);
1785 /* Note that we do not pay attention here to whether the frame
1786 is visible, since Fwindow_list skips non-visible frames if
1787 that is desired, under the control of frame_arg. */
1788 if (!MINI_WINDOW_P (w
)
1789 /* For UNSHOW_BUFFER, we must always consider all windows. */
1790 || type
== UNSHOW_BUFFER
1791 || (mini
&& minibuf_level
> 0))
1794 case GET_BUFFER_WINDOW
:
1795 if (EQ (w
->buffer
, obj
)
1796 /* Don't find any minibuffer window
1797 except the one that is currently in use. */
1798 && (MINI_WINDOW_P (w
)
1799 ? EQ (window
, minibuf_window
)
1802 if (NILP (best_window
))
1803 best_window
= window
;
1804 else if (EQ (window
, selected_window
))
1805 /* For compatibility with 20.x, prefer to return
1807 best_window
= window
;
1811 case GET_LRU_WINDOW
:
1812 /* t as arg means consider only full-width windows */
1813 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1815 /* Ignore dedicated windows and minibuffers. */
1816 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1818 if (NILP (best_window
)
1819 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1820 > XFASTINT (w
->use_time
)))
1821 best_window
= window
;
1824 case DELETE_OTHER_WINDOWS
:
1825 if (!EQ (window
, obj
))
1826 Fdelete_window (window
);
1829 case DELETE_BUFFER_WINDOWS
:
1830 if (EQ (w
->buffer
, obj
))
1832 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1834 /* If this window is dedicated, and in a frame of its own,
1836 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1837 && !NILP (w
->dedicated
)
1838 && other_visible_frames (f
))
1840 /* Skip the other windows on this frame.
1841 There might be one, the minibuffer! */
1842 while (CONSP (XCDR (windows
))
1843 && EQ (XWINDOW (XCAR (windows
))->frame
,
1844 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1845 windows
= XCDR (windows
);
1847 /* Now we can safely delete the frame. */
1848 Fdelete_frame (w
->frame
, Qnil
);
1850 else if (NILP (w
->parent
))
1852 /* If we're deleting the buffer displayed in the
1853 only window on the frame, find a new buffer to
1856 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1858 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1859 Fset_window_buffer (window
, buffer
);
1860 if (EQ (window
, selected_window
))
1861 Fset_buffer (w
->buffer
);
1864 Fdelete_window (window
);
1868 case GET_LARGEST_WINDOW
:
1870 /* Ignore dedicated windows and minibuffers. */
1871 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1874 if (NILP (best_window
))
1875 best_window
= window
;
1878 struct window
*b
= XWINDOW (best_window
);
1879 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1880 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1881 best_window
= window
;
1887 if (EQ (w
->buffer
, obj
))
1890 struct frame
*f
= XFRAME (w
->frame
);
1892 /* Find another buffer to show in this window. */
1893 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1895 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1897 /* If this window is dedicated, and in a frame of its own,
1899 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1900 && !NILP (w
->dedicated
)
1901 && other_visible_frames (f
))
1903 /* Skip the other windows on this frame.
1904 There might be one, the minibuffer! */
1905 while (CONSP (XCDR (windows
))
1906 && EQ (XWINDOW (XCAR (windows
))->frame
,
1907 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1908 windows
= XCDR (windows
);
1910 /* Now we can safely delete the frame. */
1911 Fdelete_frame (w
->frame
, Qnil
);
1915 /* Otherwise show a different buffer in the window. */
1916 w
->dedicated
= Qnil
;
1917 Fset_window_buffer (window
, buffer
);
1918 if (EQ (window
, selected_window
))
1919 Fset_buffer (w
->buffer
);
1924 /* Check for a window that has a killed buffer. */
1925 case CHECK_ALL_WINDOWS
:
1926 if (! NILP (w
->buffer
)
1927 && NILP (XBUFFER (w
->buffer
)->name
))
1931 case WINDOW_LOOP_UNUSED
:
1940 /* Used for debugging. Abort if any window has a dead buffer. */
1943 check_all_windows ()
1945 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1948 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1949 "Return the window least recently selected or used for display.\n\
1950 If optional argument FRAME is `visible', search all visible frames.\n\
1951 If FRAME is 0, search all visible and iconified frames.\n\
1952 If FRAME is t, search all frames.\n\
1953 If FRAME is nil, search only the selected frame.\n\
1954 If FRAME is a frame, search only that frame.")
1958 register Lisp_Object w
;
1959 /* First try for a window that is full-width */
1960 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1961 if (!NILP (w
) && !EQ (w
, selected_window
))
1963 /* If none of them, try the rest */
1964 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1967 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1968 "Return the largest window in area.\n\
1969 If optional argument FRAME is `visible', search all visible frames.\n\
1970 If FRAME is 0, search all visible and iconified frames.\n\
1971 If FRAME is t, search all frames.\n\
1972 If FRAME is nil, search only the selected frame.\n\
1973 If FRAME is a frame, search only that frame.")
1977 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1981 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1982 "Return a window currently displaying BUFFER, or nil if none.\n\
1983 If optional argument FRAME is `visible', search all visible frames.\n\
1984 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1985 If FRAME is t, search all frames.\n\
1986 If FRAME is nil, search only the selected frame.\n\
1987 If FRAME is a frame, search only that frame.")
1989 Lisp_Object buffer
, frame
;
1991 buffer
= Fget_buffer (buffer
);
1992 if (BUFFERP (buffer
))
1993 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1998 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2000 "Make WINDOW (or the selected window) fill its frame.\n\
2001 Only the frame WINDOW is on is affected.\n\
2002 This function tries to reduce display jumps\n\
2003 by keeping the text previously visible in WINDOW\n\
2004 in the same place on the frame. Doing this depends on\n\
2005 the value of (window-start WINDOW), so if calling this function\n\
2006 in a program gives strange scrolling, make sure the window-start\n\
2007 value is reasonable when this function is called.")
2016 window
= selected_window
;
2018 CHECK_LIVE_WINDOW (window
, 0);
2019 w
= XWINDOW (window
);
2021 startpos
= marker_position (w
->start
);
2022 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2024 if (MINI_WINDOW_P (w
) && top
> 0)
2025 error ("Can't expand minibuffer to full frame");
2027 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2029 /* Try to minimize scrolling, by setting the window start to the point
2030 will cause the text at the old window start to be at the same place
2031 on the frame. But don't try to do this if the window start is
2032 outside the visible portion (as might happen when the display is
2033 not current, due to typeahead). */
2034 new_top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2036 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2037 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2039 struct position pos
;
2040 struct buffer
*obuf
= current_buffer
;
2042 Fset_buffer (w
->buffer
);
2043 /* This computation used to temporarily move point, but that can
2044 have unwanted side effects due to text properties. */
2045 pos
= *vmotion (startpos
, -top
, w
);
2047 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2048 w
->window_end_valid
= Qnil
;
2049 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2050 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2052 /* We need to do this, so that the window-scroll-functions
2054 w
->optional_new_start
= Qt
;
2056 set_buffer_internal (obuf
);
2062 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2063 1, 2, "bDelete windows on (buffer): ",
2064 "Delete all windows showing BUFFER.\n\
2065 Optional second argument FRAME controls which frames are affected.\n\
2066 If optional argument FRAME is `visible', search all visible frames.\n\
2067 If FRAME is 0, search all visible and iconified frames.\n\
2068 If FRAME is nil, search all frames.\n\
2069 If FRAME is t, search only the selected frame.\n\
2070 If FRAME is a frame, search only that frame.")
2072 Lisp_Object buffer
, frame
;
2074 /* FRAME uses t and nil to mean the opposite of what window_loop
2078 else if (EQ (frame
, Qt
))
2083 buffer
= Fget_buffer (buffer
);
2084 CHECK_BUFFER (buffer
, 0);
2085 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2091 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2092 Sreplace_buffer_in_windows
,
2093 1, 1, "bReplace buffer in windows: ",
2094 "Replace BUFFER with some other buffer in all windows showing it.")
2100 buffer
= Fget_buffer (buffer
);
2101 CHECK_BUFFER (buffer
, 0);
2102 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2107 /* Replace BUFFER with some other buffer in all windows
2108 of all frames, even those on other keyboards. */
2111 replace_buffer_in_all_windows (buffer
)
2115 Lisp_Object tail
, frame
;
2117 /* A single call to window_loop won't do the job
2118 because it only considers frames on the current keyboard.
2119 So loop manually over frames, and handle each one. */
2120 FOR_EACH_FRAME (tail
, frame
)
2121 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2123 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2127 /* Set the height of WINDOW and all its inferiors. */
2129 /* The smallest acceptable dimensions for a window. Anything smaller
2130 might crash Emacs. */
2132 #define MIN_SAFE_WINDOW_WIDTH (2)
2133 #define MIN_SAFE_WINDOW_HEIGHT (2)
2135 /* Make sure that window_min_height and window_min_width are
2136 not too small; if they are, set them to safe minima. */
2139 check_min_window_sizes ()
2141 /* Smaller values might permit a crash. */
2142 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2143 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2144 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2145 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2148 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2149 minimum allowable size. */
2152 check_frame_size (frame
, rows
, cols
)
2156 /* For height, we have to see:
2157 whether the frame has a minibuffer,
2158 whether it wants a mode line, and
2159 whether it has a menu bar. */
2161 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2162 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2163 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2165 if (FRAME_TOP_MARGIN (frame
) > 0)
2166 min_height
+= FRAME_TOP_MARGIN (frame
);
2168 if (*rows
< min_height
)
2170 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2171 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2175 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2176 check if W's width can be changed, otherwise check W's height.
2177 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2178 siblings, too. If none of the siblings is resizable, WINDOW isn't
2182 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2184 int width_p
, check_siblings_p
;
2189 if (!NILP (w
->hchild
))
2191 c
= XWINDOW (w
->hchild
);
2195 /* A horiz. combination is fixed-width if all of if its
2197 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2198 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2199 fixed_p
= c
== NULL
;
2203 /* A horiz. combination is fixed-height if one of if its
2205 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2206 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2207 fixed_p
= c
!= NULL
;
2210 else if (!NILP (w
->vchild
))
2212 c
= XWINDOW (w
->vchild
);
2216 /* A vert. combination is fixed-width if one of if its
2218 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2219 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2220 fixed_p
= c
!= NULL
;
2224 /* A vert. combination is fixed-height if all of if its
2226 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2227 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2228 fixed_p
= c
== NULL
;
2231 else if (BUFFERP (w
->buffer
))
2233 if (w
->height_fixed_p
&& !width_p
)
2237 struct buffer
*old
= current_buffer
;
2240 current_buffer
= XBUFFER (w
->buffer
);
2241 val
= find_symbol_value (Qwindow_size_fixed
);
2242 current_buffer
= old
;
2245 if (!EQ (val
, Qunbound
))
2247 fixed_p
= !NILP (val
);
2250 && ((EQ (val
, Qheight
) && width_p
)
2251 || (EQ (val
, Qwidth
) && !width_p
)))
2256 /* Can't tell if this one is resizable without looking at
2257 siblings. If all siblings are fixed-size this one is too. */
2258 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2262 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2263 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2267 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2268 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2282 /* Return the minimum size of window W, not taking fixed-width windows
2283 into account. WIDTH_P non-zero means return the minimum width,
2284 otherwise return the minimum height. If W is a combination window,
2285 compute the minimum size from the minimum sizes of W's children. */
2288 window_min_size_1 (w
, width_p
)
2295 if (!NILP (w
->hchild
))
2297 c
= XWINDOW (w
->hchild
);
2302 /* The min width of a horizontal combination is
2303 the sum of the min widths of its children. */
2306 size
+= window_min_size_1 (c
, width_p
);
2307 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2312 /* The min height a horizontal combination equals
2313 the maximum of all min height of its children. */
2316 int min_size
= window_min_size_1 (c
, width_p
);
2317 size
= max (min_size
, size
);
2318 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2322 else if (!NILP (w
->vchild
))
2324 c
= XWINDOW (w
->vchild
);
2329 /* The min width of a vertical combination is
2330 the maximum of the min widths of its children. */
2333 int min_size
= window_min_size_1 (c
, width_p
);
2334 size
= max (min_size
, size
);
2335 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2340 /* The min height of a vertical combination equals
2341 the sum of the min height of its children. */
2344 size
+= window_min_size_1 (c
, width_p
);
2345 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2352 size
= window_min_width
;
2355 if (MINI_WINDOW_P (w
)
2356 || (!WINDOW_WANTS_MODELINE_P (w
)
2357 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2360 size
= window_min_height
;
2368 /* Return the minimum size of window W, taking fixed-size windows into
2369 account. WIDTH_P non-zero means return the minimum width,
2370 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2371 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2372 unless FIXED is null. */
2375 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2377 int width_p
, ignore_fixed_p
, *fixed
;
2384 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2390 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2392 size
= window_min_size_1 (w
, width_p
);
2398 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2399 WINDOW's width. Resize WINDOW's children, if any, so that they
2400 keep their proportionate size relative to WINDOW. Propagate
2401 WINDOW's top or left edge position to children. Delete windows
2402 that become too small unless NODELETE_P is non-zero. */
2405 size_window (window
, size
, width_p
, nodelete_p
)
2407 int size
, width_p
, nodelete_p
;
2409 struct window
*w
= XWINDOW (window
);
2411 Lisp_Object child
, *forward
, *sideward
;
2412 int old_size
, min_size
;
2414 check_min_window_sizes ();
2415 size
= max (0, size
);
2417 /* If the window has been "too small" at one point,
2418 don't delete it for being "too small" in the future.
2419 Preserve it as long as that is at all possible. */
2422 old_size
= XINT (w
->width
);
2423 min_size
= window_min_width
;
2427 old_size
= XINT (w
->height
);
2428 min_size
= window_min_height
;
2431 if (old_size
< min_size
)
2432 w
->too_small_ok
= Qt
;
2434 /* Maybe delete WINDOW if it's too small. */
2435 if (!nodelete_p
&& !NILP (w
->parent
))
2437 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2438 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2440 min_size
= width_p
? window_min_width
: window_min_height
;
2442 if (size
< min_size
)
2444 delete_window (window
);
2449 /* Set redisplay hints. */
2450 w
->last_modified
= make_number (0);
2451 w
->last_overlay_modified
= make_number (0);
2452 windows_or_buffers_changed
++;
2453 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2457 sideward
= &w
->vchild
;
2458 forward
= &w
->hchild
;
2459 w
->width
= make_number (size
);
2463 sideward
= &w
->hchild
;
2464 forward
= &w
->vchild
;
2465 w
->height
= make_number (size
);
2466 w
->orig_height
= Qnil
;
2469 if (!NILP (*sideward
))
2471 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2473 c
= XWINDOW (child
);
2478 size_window (child
, size
, width_p
, nodelete_p
);
2481 else if (!NILP (*forward
))
2483 int fixed_size
, each
, extra
, n
;
2484 int resize_fixed_p
, nfixed
;
2485 int last_pos
, first_pos
, nchildren
, total
;
2487 /* Determine the fixed-size portion of the this window, and the
2488 number of child windows. */
2489 fixed_size
= nchildren
= nfixed
= total
= 0;
2490 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2494 c
= XWINDOW (child
);
2495 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2496 total
+= child_size
;
2498 if (window_fixed_size_p (c
, width_p
, 0))
2500 fixed_size
+= child_size
;
2505 /* If the new size is smaller than fixed_size, or if there
2506 aren't any resizable windows, allow resizing fixed-size
2508 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2510 /* Compute how many lines/columns to add to each child. The
2511 value of extra takes care of rounding errors. */
2512 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2513 each
= (size
- total
) / n
;
2514 extra
= (size
- total
) - n
* each
;
2516 /* Compute new children heights and edge positions. */
2517 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2518 last_pos
= first_pos
;
2519 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2521 int new_size
, old_size
;
2523 c
= XWINDOW (child
);
2524 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2525 new_size
= old_size
;
2527 /* The top or left edge position of this child equals the
2528 bottom or right edge of its predecessor. */
2530 c
->left
= make_number (last_pos
);
2532 c
->top
= make_number (last_pos
);
2534 /* If this child can be resized, do it. */
2535 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2537 new_size
= old_size
+ each
+ extra
;
2541 /* Set new height. Note that size_window also propagates
2542 edge positions to children, so it's not a no-op if we
2543 didn't change the child's size. */
2544 size_window (child
, new_size
, width_p
, 1);
2546 /* Remember the bottom/right edge position of this child; it
2547 will be used to set the top/left edge of the next child. */
2548 last_pos
+= new_size
;
2551 /* We should have covered the parent exactly with child windows. */
2552 xassert (size
== last_pos
- first_pos
);
2554 /* Now delete any children that became too small. */
2556 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2559 c
= XWINDOW (child
);
2560 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2561 size_window (child
, child_size
, width_p
, 0);
2566 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2567 WINDOW's children. NODELETE non-zero means don't delete windows
2568 that become too small in the process. (The caller should check
2569 later and do so if appropriate.) */
2572 set_window_height (window
, height
, nodelete
)
2577 size_window (window
, height
, 0, nodelete
);
2581 /* Set WINDOW's width to WIDTH, and recursively change the width of
2582 WINDOW's children. NODELETE non-zero means don't delete windows
2583 that become too small in the process. (The caller should check
2584 later and do so if appropriate.) */
2587 set_window_width (window
, width
, nodelete
)
2592 size_window (window
, width
, 1, nodelete
);
2596 int window_select_count
;
2599 Fset_window_buffer_unwind (obuf
)
2607 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2608 means it's allowed to run hooks. See make_frame for a case where
2609 it's not allowed. */
2612 set_window_buffer (window
, buffer
, run_hooks_p
)
2613 Lisp_Object window
, buffer
;
2616 struct window
*w
= XWINDOW (window
);
2617 struct buffer
*b
= XBUFFER (buffer
);
2618 int count
= specpdl_ptr
- specpdl
;
2622 if (EQ (window
, selected_window
))
2623 b
->last_selected_window
= window
;
2625 /* Update time stamps of buffer display. */
2626 if (INTEGERP (b
->display_count
))
2627 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2628 b
->display_time
= Fcurrent_time ();
2630 XSETFASTINT (w
->window_end_pos
, 0);
2631 XSETFASTINT (w
->window_end_vpos
, 0);
2632 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2633 w
->window_end_valid
= Qnil
;
2634 w
->hscroll
= w
->min_hscroll
= make_number (0);
2636 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2637 set_marker_restricted (w
->start
,
2638 make_number (b
->last_window_start
),
2640 w
->start_at_line_beg
= Qnil
;
2641 w
->force_start
= Qnil
;
2642 XSETFASTINT (w
->last_modified
, 0);
2643 XSETFASTINT (w
->last_overlay_modified
, 0);
2644 windows_or_buffers_changed
++;
2646 /* We must select BUFFER for running the window-scroll-functions.
2647 If WINDOW is selected, switch permanently.
2648 Otherwise, switch but go back to the ambient buffer afterward. */
2649 if (EQ (window
, selected_window
))
2650 Fset_buffer (buffer
);
2651 /* We can't check ! NILP (Vwindow_scroll_functions) here
2652 because that might itself be a local variable. */
2653 else if (window_initialized
)
2655 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2656 Fset_buffer (buffer
);
2659 /* Set left and right marginal area width from buffer. */
2660 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2664 if (! NILP (Vwindow_scroll_functions
))
2665 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2666 Fmarker_position (w
->start
));
2668 if (! NILP (Vwindow_configuration_change_hook
)
2669 && ! NILP (Vrun_hooks
))
2670 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2673 unbind_to (count
, Qnil
);
2677 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2678 "Make WINDOW display BUFFER as its contents.\n\
2679 BUFFER can be a buffer or buffer name.")
2681 register Lisp_Object window
, buffer
;
2683 register Lisp_Object tem
;
2684 register struct window
*w
= decode_window (window
);
2686 XSETWINDOW (window
, w
);
2687 buffer
= Fget_buffer (buffer
);
2688 CHECK_BUFFER (buffer
, 1);
2690 if (NILP (XBUFFER (buffer
)->name
))
2691 error ("Attempt to display deleted buffer");
2695 error ("Window is deleted");
2696 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2697 is first being set up. */
2699 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2700 error ("Window is dedicated to `%s'",
2701 XSTRING (XBUFFER (tem
)->name
)->data
);
2706 set_window_buffer (window
, buffer
, 1);
2710 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2711 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2712 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2713 Note that the main editor command loop\n\
2714 selects the buffer of the selected window before each command.")
2716 register Lisp_Object window
;
2718 return select_window_1 (window
, 1);
2721 /* Note that selected_window can be nil
2722 when this is called from Fset_window_configuration. */
2725 select_window_1 (window
, recordflag
)
2726 register Lisp_Object window
;
2729 register struct window
*w
;
2730 register struct window
*ow
;
2733 CHECK_LIVE_WINDOW (window
, 0);
2735 w
= XWINDOW (window
);
2737 if (NILP (w
->buffer
))
2738 error ("Trying to select deleted window or non-leaf window");
2740 XSETFASTINT (w
->use_time
, ++window_select_count
);
2741 if (EQ (window
, selected_window
))
2744 if (!NILP (selected_window
))
2746 ow
= XWINDOW (selected_window
);
2747 if (! NILP (ow
->buffer
))
2748 set_marker_both (ow
->pointm
, ow
->buffer
,
2749 BUF_PT (XBUFFER (ow
->buffer
)),
2750 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2753 selected_window
= window
;
2754 sf
= SELECTED_FRAME ();
2755 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2757 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2758 /* Use this rather than Fhandle_switch_frame
2759 so that FRAME_FOCUS_FRAME is moved appropriately as we
2760 move around in the state where a minibuffer in a separate
2762 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2765 sf
->selected_window
= window
;
2768 record_buffer (w
->buffer
);
2769 Fset_buffer (w
->buffer
);
2771 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2773 /* Go to the point recorded in the window.
2774 This is important when the buffer is in more
2775 than one window. It also matters when
2776 redisplay_window has altered point after scrolling,
2777 because it makes the change only in the window. */
2779 register int new_point
= marker_position (w
->pointm
);
2780 if (new_point
< BEGV
)
2782 else if (new_point
> ZV
)
2788 windows_or_buffers_changed
++;
2792 /* Deiconify the frame containing the window WINDOW,
2793 unless it is the selected frame;
2796 The reason for the exception for the selected frame
2797 is that it seems better not to change the selected frames visibility
2798 merely because of displaying a different buffer in it.
2799 The deiconification is useful when a buffer gets shown in
2800 another frame that you were not using lately. */
2803 display_buffer_1 (window
)
2806 Lisp_Object frame
= XWINDOW (window
)->frame
;
2807 FRAME_PTR f
= XFRAME (frame
);
2809 FRAME_SAMPLE_VISIBILITY (f
);
2811 if (!EQ (frame
, selected_frame
))
2813 if (FRAME_ICONIFIED_P (f
))
2814 Fmake_frame_visible (frame
);
2815 else if (FRAME_VISIBLE_P (f
))
2816 Fraise_frame (frame
);
2822 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2823 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2824 The value is actually t if the frame should be called with default frame\n\
2825 parameters, and a list of frame parameters if they were specified.\n\
2826 See `special-display-buffer-names', and `special-display-regexps'.")
2828 Lisp_Object buffer_name
;
2832 CHECK_STRING (buffer_name
, 1);
2834 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2838 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2842 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2844 Lisp_Object car
= XCAR (tem
);
2846 && fast_string_match (car
, buffer_name
) >= 0)
2848 else if (CONSP (car
)
2849 && STRINGP (XCAR (car
))
2850 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2856 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2857 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2858 See `same-window-buffer-names' and `same-window-regexps'.")
2860 Lisp_Object buffer_name
;
2864 CHECK_STRING (buffer_name
, 1);
2866 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2870 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2874 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2876 Lisp_Object car
= XCAR (tem
);
2878 && fast_string_match (car
, buffer_name
) >= 0)
2880 else if (CONSP (car
)
2881 && STRINGP (XCAR (car
))
2882 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2888 /* Use B so the default is (other-buffer). */
2889 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2890 "BDisplay buffer: \nP",
2891 "Make BUFFER appear in some window but don't select it.\n\
2892 BUFFER can be a buffer or a buffer name.\n\
2893 If BUFFER is shown already in some window, just use that one,\n\
2894 unless the window is the selected window and the optional second\n\
2895 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2896 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2897 Returns the window displaying BUFFER.\n\
2898 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2899 displaying BUFFER, then simply raise that frame.\n\
2901 The variables `special-display-buffer-names', `special-display-regexps',\n\
2902 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2903 buffer names are handled.\n\
2905 If optional argument FRAME is `visible', search all visible frames.\n\
2906 If FRAME is 0, search all visible and iconified frames.\n\
2907 If FRAME is t, search all frames.\n\
2908 If FRAME is a frame, search only that frame.\n\
2909 If FRAME is nil, search only the selected frame\n\
2910 (actually the last nonminibuffer frame),\n\
2911 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2912 which means search visible and iconified frames.\n\
2914 If `even-window-heights' is non-nil, window heights will be evened out\n\
2915 if displaying the buffer causes two vertically adjacent windows to be\n\
2917 (buffer
, not_this_window
, frame
)
2918 register Lisp_Object buffer
, not_this_window
, frame
;
2920 register Lisp_Object window
, tem
, swp
;
2924 buffer
= Fget_buffer (buffer
);
2925 CHECK_BUFFER (buffer
, 0);
2927 if (!NILP (Vdisplay_buffer_function
))
2928 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2930 if (NILP (not_this_window
)
2931 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2932 return display_buffer_1 (selected_window
);
2934 /* See if the user has specified this buffer should appear
2935 in the selected window. */
2936 if (NILP (not_this_window
))
2938 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2939 if (!NILP (swp
) && !no_switch_window (selected_window
))
2941 Fswitch_to_buffer (buffer
, Qnil
);
2942 return display_buffer_1 (selected_window
);
2946 /* If the user wants pop-up-frames or display-reuse-frames, then
2947 look for a window showing BUFFER on any visible or iconified frame.
2948 Otherwise search only the current frame. */
2951 else if (pop_up_frames
2952 || display_buffer_reuse_frames
2953 || last_nonminibuf_frame
== 0)
2954 XSETFASTINT (tem
, 0);
2956 XSETFRAME (tem
, last_nonminibuf_frame
);
2958 window
= Fget_buffer_window (buffer
, tem
);
2960 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2961 return display_buffer_1 (window
);
2963 /* Certain buffer names get special handling. */
2964 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2966 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2968 return call1 (Vspecial_display_function
, buffer
);
2970 return call2 (Vspecial_display_function
, buffer
, tem
);
2973 /* If there are no frames open that have more than a minibuffer,
2974 we need to create a new frame. */
2975 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2977 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2978 Fset_window_buffer (window
, buffer
);
2979 return display_buffer_1 (window
);
2982 f
= SELECTED_FRAME ();
2984 || FRAME_MINIBUF_ONLY_P (f
)
2985 /* If the current frame is a special display frame,
2986 don't try to reuse its windows. */
2987 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2992 if (FRAME_MINIBUF_ONLY_P (f
))
2993 XSETFRAME (frames
, last_nonminibuf_frame
);
2994 /* Don't try to create a window if would get an error */
2995 if (split_height_threshold
< window_min_height
<< 1)
2996 split_height_threshold
= window_min_height
<< 1;
2998 /* Note that both Fget_largest_window and Fget_lru_window
2999 ignore minibuffers and dedicated windows.
3000 This means they can return nil. */
3002 /* If the frame we would try to split cannot be split,
3003 try other frames. */
3004 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3006 /* Try visible frames first. */
3007 window
= Fget_largest_window (Qvisible
);
3008 /* If that didn't work, try iconified frames. */
3010 window
= Fget_largest_window (make_number (0));
3012 window
= Fget_largest_window (Qt
);
3015 window
= Fget_largest_window (frames
);
3017 /* If we got a tall enough full-width window that can be split,
3020 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3021 && window_height (window
) >= split_height_threshold
3022 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3023 window
= Fsplit_window (window
, Qnil
, Qnil
);
3026 Lisp_Object upper
, lower
, other
;
3028 window
= Fget_lru_window (frames
);
3029 /* If the LRU window is selected, and big enough,
3030 and can be split, split it. */
3032 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3033 && (EQ (window
, selected_window
)
3034 || EQ (XWINDOW (window
)->parent
, Qnil
))
3035 && window_height (window
) >= window_min_height
<< 1)
3036 window
= Fsplit_window (window
, Qnil
, Qnil
);
3037 /* If Fget_lru_window returned nil, try other approaches. */
3039 /* Try visible frames first. */
3041 window
= Fget_buffer_window (buffer
, Qvisible
);
3043 window
= Fget_largest_window (Qvisible
);
3044 /* If that didn't work, try iconified frames. */
3046 window
= Fget_buffer_window (buffer
, make_number (0));
3048 window
= Fget_largest_window (make_number (0));
3049 /* Try invisible frames. */
3051 window
= Fget_buffer_window (buffer
, Qt
);
3053 window
= Fget_largest_window (Qt
);
3054 /* As a last resort, make a new frame. */
3056 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3057 /* If window appears above or below another,
3058 even out their heights. */
3059 other
= upper
= lower
= Qnil
;
3060 if (!NILP (XWINDOW (window
)->prev
))
3061 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3062 if (!NILP (XWINDOW (window
)->next
))
3063 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3065 && !NILP (Veven_window_heights
)
3066 /* Check that OTHER and WINDOW are vertically arrayed. */
3067 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3068 && (XFASTINT (XWINDOW (other
)->height
)
3069 > XFASTINT (XWINDOW (window
)->height
)))
3071 int total
= (XFASTINT (XWINDOW (other
)->height
)
3072 + XFASTINT (XWINDOW (window
)->height
));
3073 enlarge_window (upper
,
3074 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3080 window
= Fget_lru_window (Qnil
);
3082 Fset_window_buffer (window
, buffer
);
3083 return display_buffer_1 (window
);
3087 temp_output_buffer_show (buf
)
3088 register Lisp_Object buf
;
3090 register struct buffer
*old
= current_buffer
;
3091 register Lisp_Object window
;
3092 register struct window
*w
;
3094 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3097 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3101 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3102 set_buffer_internal (old
);
3104 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3105 call1 (Vtemp_buffer_show_function
, buf
);
3108 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3110 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3111 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3112 Vminibuf_scroll_window
= window
;
3113 w
= XWINDOW (window
);
3114 XSETFASTINT (w
->hscroll
, 0);
3115 XSETFASTINT (w
->min_hscroll
, 0);
3116 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3117 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3119 /* Run temp-buffer-show-hook, with the chosen window selected
3120 and it sbuffer current. */
3121 if (!NILP (Vrun_hooks
))
3124 tem
= Fboundp (Qtemp_buffer_show_hook
);
3127 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3130 int count
= specpdl_ptr
- specpdl
;
3131 Lisp_Object prev_window
;
3132 prev_window
= selected_window
;
3134 /* Select the window that was chosen, for running the hook. */
3135 record_unwind_protect (Fselect_window
, prev_window
);
3136 select_window_1 (window
, 0);
3137 Fset_buffer (w
->buffer
);
3138 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3139 select_window_1 (prev_window
, 0);
3140 unbind_to (count
, Qnil
);
3148 make_dummy_parent (window
)
3152 register struct window
*o
, *p
;
3155 o
= XWINDOW (window
);
3156 p
= allocate_window ();
3157 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3158 ((struct Lisp_Vector
*) p
)->contents
[i
]
3159 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3160 XSETWINDOW (new, p
);
3162 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3164 /* Put new into window structure in place of window */
3165 replace_window (window
, new);
3178 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3179 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3180 WINDOW defaults to selected one and SIZE to half its size.\n\
3181 If optional third arg HORFLAG is non-nil, split side by side\n\
3182 and put SIZE columns in the first of the pair. In that case,\n\
3183 SIZE includes that window's scroll bar, or the divider column to its right.")
3184 (window
, size
, horflag
)
3185 Lisp_Object window
, size
, horflag
;
3187 register Lisp_Object
new;
3188 register struct window
*o
, *p
;
3190 register int size_int
;
3193 window
= selected_window
;
3195 CHECK_LIVE_WINDOW (window
, 0);
3197 o
= XWINDOW (window
);
3198 fo
= XFRAME (WINDOW_FRAME (o
));
3202 if (!NILP (horflag
))
3203 /* Calculate the size of the left-hand window, by dividing
3204 the usable space in columns by two.
3205 We round up, since the left-hand window may include
3206 a dividing line, while the right-hand may not. */
3207 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3209 size_int
= XFASTINT (o
->height
) >> 1;
3213 CHECK_NUMBER (size
, 1);
3214 size_int
= XINT (size
);
3217 if (MINI_WINDOW_P (o
))
3218 error ("Attempt to split minibuffer window");
3219 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3220 error ("Attempt to split fixed-size window");
3222 check_min_window_sizes ();
3226 if (size_int
< window_min_height
)
3227 error ("Window height %d too small (after splitting)", size_int
);
3228 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3229 error ("Window height %d too small (after splitting)",
3230 XFASTINT (o
->height
) - size_int
);
3231 if (NILP (o
->parent
)
3232 || NILP (XWINDOW (o
->parent
)->vchild
))
3234 make_dummy_parent (window
);
3236 XWINDOW (new)->vchild
= window
;
3241 if (size_int
< window_min_width
)
3242 error ("Window width %d too small (after splitting)", size_int
);
3244 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3245 error ("Window width %d too small (after splitting)",
3246 XFASTINT (o
->width
) - size_int
);
3247 if (NILP (o
->parent
)
3248 || NILP (XWINDOW (o
->parent
)->hchild
))
3250 make_dummy_parent (window
);
3252 XWINDOW (new)->hchild
= window
;
3256 /* Now we know that window's parent is a vertical combination
3257 if we are dividing vertically, or a horizontal combination
3258 if we are making side-by-side windows */
3260 windows_or_buffers_changed
++;
3261 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3262 new = make_window ();
3265 p
->frame
= o
->frame
;
3267 if (!NILP (p
->next
))
3268 XWINDOW (p
->next
)->prev
= new;
3271 p
->parent
= o
->parent
;
3273 p
->window_end_valid
= Qnil
;
3274 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3276 /* Apportion the available frame space among the two new windows */
3278 if (!NILP (horflag
))
3280 p
->height
= o
->height
;
3282 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3283 XSETFASTINT (o
->width
, size_int
);
3284 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3289 p
->width
= o
->width
;
3290 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3291 XSETFASTINT (o
->height
, size_int
);
3292 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3295 /* Adjust glyph matrices. */
3297 Fset_window_buffer (new, o
->buffer
);
3301 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3302 "Make current window ARG lines bigger.\n\
3303 From program, optional second arg non-nil means grow sideways ARG columns.\n\
3304 Interactively, if an argument is not given, make the window one line bigger.")
3306 register Lisp_Object arg
, side
;
3308 CHECK_NUMBER (arg
, 0);
3309 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3311 if (! NILP (Vwindow_configuration_change_hook
))
3312 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3317 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3318 "Make current window ARG lines smaller.\n\
3319 From program, optional second arg non-nil means shrink sideways arg columns.\n\
3320 Interactively, if an argument is not given, make the window one line smaller.")
3322 register Lisp_Object arg
, side
;
3324 CHECK_NUMBER (arg
, 0);
3325 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3327 if (! NILP (Vwindow_configuration_change_hook
))
3328 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3334 window_height (window
)
3337 register struct window
*p
= XWINDOW (window
);
3338 return XFASTINT (p
->height
);
3342 window_width (window
)
3345 register struct window
*p
= XWINDOW (window
);
3346 return XFASTINT (p
->width
);
3351 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3353 #define CURSIZE(w) \
3354 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3357 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3358 increase its width. Siblings of the selected window are resized to
3359 fullfil the size request. If they become too small in the process,
3360 they will be deleted. */
3363 enlarge_window (window
, delta
, widthflag
)
3365 int delta
, widthflag
;
3367 Lisp_Object parent
, next
, prev
;
3371 int (*sizefun
) P_ ((Lisp_Object
))
3372 = widthflag
? window_width
: window_height
;
3373 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3374 = (widthflag
? set_window_width
: set_window_height
);
3376 /* Check values of window_min_width and window_min_height for
3378 check_min_window_sizes ();
3380 /* Give up if this window cannot be resized. */
3381 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3382 error ("Window is not resizable");
3384 /* Find the parent of the selected window. */
3387 p
= XWINDOW (window
);
3393 error ("No other window to side of this one");
3398 ? !NILP (XWINDOW (parent
)->hchild
)
3399 : !NILP (XWINDOW (parent
)->vchild
))
3405 sizep
= &CURSIZE (window
);
3408 register int maxdelta
;
3410 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3411 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3412 - window_min_size (XWINDOW (p
->next
),
3414 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3415 - window_min_size (XWINDOW (p
->prev
),
3417 /* This is a frame with only one window, a minibuffer-only
3418 or a minibufferless frame. */
3421 if (delta
> maxdelta
)
3422 /* This case traps trying to make the minibuffer
3423 the full frame, or make the only window aside from the
3424 minibuffer the full frame. */
3428 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3430 delete_window (window
);
3437 /* Find the total we can get from other siblings. */
3439 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3440 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3442 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3443 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3446 /* If we can get it all from them, do so. */
3447 if (delta
<= maximum
)
3449 Lisp_Object first_unaffected
;
3450 Lisp_Object first_affected
;
3455 first_affected
= window
;
3456 /* Look at one sibling at a time,
3457 moving away from this window in both directions alternately,
3458 and take as much as we can get without deleting that sibling. */
3459 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3463 int this_one
= ((*sizefun
) (next
)
3464 - window_min_size (XWINDOW (next
),
3465 widthflag
, 0, &fixed_p
));
3468 if (this_one
> delta
)
3471 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3472 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3477 next
= XWINDOW (next
)->next
;
3485 int this_one
= ((*sizefun
) (prev
)
3486 - window_min_size (XWINDOW (prev
),
3487 widthflag
, 0, &fixed_p
));
3490 if (this_one
> delta
)
3493 first_affected
= prev
;
3495 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3496 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3501 prev
= XWINDOW (prev
)->prev
;
3505 xassert (delta
== 0);
3507 /* Now recalculate the edge positions of all the windows affected,
3508 based on the new sizes. */
3509 first_unaffected
= next
;
3510 prev
= first_affected
;
3511 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3512 prev
= next
, next
= XWINDOW (next
)->next
)
3514 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3515 /* This does not change size of NEXT,
3516 but it propagates the new top edge to its children */
3517 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3522 register int delta1
;
3523 register int opht
= (*sizefun
) (parent
);
3525 /* If trying to grow this window to or beyond size of the parent,
3526 make delta1 so big that, on shrinking back down,
3527 all the siblings end up with less than one line and are deleted. */
3528 if (opht
<= XINT (*sizep
) + delta
)
3529 delta1
= opht
* opht
* 2;
3532 /* Otherwise, make delta1 just right so that if we add
3533 delta1 lines to this window and to the parent, and then
3534 shrink the parent back to its original size, the new
3535 proportional size of this window will increase by delta.
3537 The function size_window will compute the new height h'
3538 of the window from delta1 as:
3541 x = delta1 - delta1/n * n for the 1st resizable child
3544 where n is the number of children that can be resized.
3545 We can ignore x by choosing a delta1 that is a multiple of
3546 n. We want the height of this window to come out as
3556 The number of children n rquals the number of resizable
3557 children of this window + 1 because we know window itself
3558 is resizable (otherwise we would have signalled an error. */
3560 struct window
*w
= XWINDOW (window
);
3564 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3565 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3567 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3568 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3574 /* Add delta1 lines or columns to this window, and to the parent,
3575 keeping things consistent while not affecting siblings. */
3576 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3577 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3579 /* Squeeze out delta1 lines or columns from our parent,
3580 shriking this window and siblings proportionately.
3581 This brings parent back to correct size.
3582 Delta1 was calculated so this makes this window the desired size,
3583 taking it all out of the siblings. */
3584 (*setsizefun
) (parent
, opht
, 0);
3587 XSETFASTINT (p
->last_modified
, 0);
3588 XSETFASTINT (p
->last_overlay_modified
, 0);
3590 /* Adjust glyph matrices. */
3591 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3599 /***********************************************************************
3600 Resizing Mini-Windows
3601 ***********************************************************************/
3603 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3605 enum save_restore_action
3612 static int save_restore_orig_size
P_ ((struct window
*,
3613 enum save_restore_action
));
3615 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3616 from lowest windows first. */
3619 shrink_window_lowest_first (w
, height
)
3627 xassert (!MINI_WINDOW_P (w
));
3629 /* Set redisplay hints. */
3630 XSETFASTINT (w
->last_modified
, 0);
3631 XSETFASTINT (w
->last_overlay_modified
, 0);
3632 windows_or_buffers_changed
++;
3633 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3635 old_height
= XFASTINT (w
->height
);
3636 XSETFASTINT (w
->height
, height
);
3638 if (!NILP (w
->hchild
))
3640 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3642 c
= XWINDOW (child
);
3644 shrink_window_lowest_first (c
, height
);
3647 else if (!NILP (w
->vchild
))
3649 Lisp_Object last_child
;
3650 int delta
= old_height
- height
;
3655 /* Find the last child. We are taking space from lowest windows
3656 first, so we iterate over children from the last child
3658 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3661 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3662 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3666 c
= XWINDOW (child
);
3667 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3669 if (this_one
> delta
)
3672 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3676 /* Compute new positions. */
3677 last_top
= XINT (w
->top
);
3678 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3680 c
= XWINDOW (child
);
3681 c
->top
= make_number (last_top
);
3682 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3683 last_top
+= XFASTINT (c
->height
);
3689 /* Save, restore, or check positions and sizes in the window tree
3690 rooted at W. ACTION says what to do.
3692 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3693 members are valid for all windows in the window tree. Value is
3694 non-zero if they are valid.
3696 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3697 orig_top and orig_height for all windows in the tree.
3699 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3700 values stored in orig_top and orig_height for all windows. */
3703 save_restore_orig_size (w
, action
)
3705 enum save_restore_action action
;
3711 if (!NILP (w
->hchild
))
3713 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3716 else if (!NILP (w
->vchild
))
3718 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3724 case CHECK_ORIG_SIZES
:
3725 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3729 case SAVE_ORIG_SIZES
:
3730 w
->orig_top
= w
->top
;
3731 w
->orig_height
= w
->height
;
3732 XSETFASTINT (w
->last_modified
, 0);
3733 XSETFASTINT (w
->last_overlay_modified
, 0);
3736 case RESTORE_ORIG_SIZES
:
3737 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3738 w
->top
= w
->orig_top
;
3739 w
->height
= w
->orig_height
;
3740 w
->orig_height
= w
->orig_top
= Qnil
;
3741 XSETFASTINT (w
->last_modified
, 0);
3742 XSETFASTINT (w
->last_overlay_modified
, 0);
3749 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3756 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3757 without deleting other windows. */
3760 grow_mini_window (w
, delta
)
3764 struct frame
*f
= XFRAME (w
->frame
);
3765 struct window
*root
;
3767 xassert (MINI_WINDOW_P (w
));
3768 xassert (delta
>= 0);
3770 /* Check values of window_min_width and window_min_height for
3772 check_min_window_sizes ();
3774 /* Compute how much we can enlarge the mini-window without deleting
3776 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3779 int min_height
= window_min_size (root
, 0, 0, 0);
3780 if (XFASTINT (root
->height
) - delta
< min_height
)
3781 delta
= XFASTINT (root
->height
) - min_height
;
3786 /* Save original window sizes and positions, if not already done. */
3787 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3788 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3790 /* Shrink other windows. */
3791 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3793 /* Grow the mini-window. */
3794 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3795 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3796 XSETFASTINT (w
->last_modified
, 0);
3797 XSETFASTINT (w
->last_overlay_modified
, 0);
3804 /* Shrink mini-window W. If there is recorded info about window sizes
3805 before a call to grow_mini_window, restore recorded window sizes.
3806 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3810 shrink_mini_window (w
)
3813 struct frame
*f
= XFRAME (w
->frame
);
3814 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3816 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3818 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3820 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3821 windows_or_buffers_changed
= 1;
3823 else if (XFASTINT (w
->height
) > 1)
3825 /* Distribute the additional lines of the mini-window
3826 among the other windows. */
3828 XSETWINDOW (window
, w
);
3829 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3835 /* Mark window cursors off for all windows in the window tree rooted
3836 at W by setting their phys_cursor_on_p flag to zero. Called from
3837 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3838 the frame are cleared. */
3841 mark_window_cursors_off (w
)
3846 if (!NILP (w
->hchild
))
3847 mark_window_cursors_off (XWINDOW (w
->hchild
));
3848 else if (!NILP (w
->vchild
))
3849 mark_window_cursors_off (XWINDOW (w
->vchild
));
3851 w
->phys_cursor_on_p
= 0;
3853 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3858 /* Return number of lines of text (not counting mode line) in W. */
3861 window_internal_height (w
)
3864 int ht
= XFASTINT (w
->height
);
3866 if (MINI_WINDOW_P (w
))
3869 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3870 || !NILP (w
->next
) || !NILP (w
->prev
)
3871 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3878 /* Return the number of columns in W.
3879 Don't count columns occupied by scroll bars or the vertical bar
3880 separating W from the sibling to its right. */
3883 window_internal_width (w
)
3886 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3887 int width
= XINT (w
->width
);
3889 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3890 /* Scroll bars occupy a few columns. */
3891 width
-= FRAME_SCROLL_BAR_COLS (f
);
3892 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3893 /* The column of `|' characters separating side-by-side windows
3894 occupies one column only. */
3897 /* On window-systems, areas to the left and right of the window
3898 are used to display bitmaps there. */
3899 if (FRAME_WINDOW_P (f
))
3900 width
-= FRAME_FLAGS_AREA_COLS (f
);
3906 /************************************************************************
3908 ***********************************************************************/
3910 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3911 one screen-full, which is defined as the height of the window minus
3912 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3913 instead. Negative values of N mean scroll down. NOERROR non-zero
3914 means don't signal an error if we try to move over BEGV or ZV,
3918 window_scroll (window
, n
, whole
, noerror
)
3924 /* If we must, use the pixel-based version which is much slower than
3925 the line-based one but can handle varying line heights. */
3926 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3927 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3929 window_scroll_line_based (window
, n
, whole
, noerror
);
3933 /* Implementation of window_scroll that works based on pixel line
3934 heights. See the comment of window_scroll for parameter
3938 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3945 struct window
*w
= XWINDOW (window
);
3946 struct text_pos start
;
3948 int this_scroll_margin
;
3950 /* True if we fiddled the window vscroll field without really scrolling. */
3953 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3955 /* If PT is not visible in WINDOW, move back one half of
3957 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qnil
);
3960 /* Move backward half the height of the window. Performance note:
3961 vmotion used here is about 10% faster, but would give wrong
3962 results for variable height lines. */
3963 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3964 it
.current_y
= it
.last_visible_y
;
3965 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3967 /* The function move_iterator_vertically may move over more than
3968 the specified y-distance. If it->w is small, e.g. a
3969 mini-buffer window, we may end up in front of the window's
3970 display area. This is the case when Start displaying at the
3971 start of the line containing PT in this case. */
3972 if (it
.current_y
<= 0)
3974 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3975 move_it_vertically (&it
, 0);
3979 start
= it
.current
.pos
;
3982 /* If scroll_preserve_screen_position is non-zero, we try to set
3983 point in the same window line as it is now, so get that line. */
3984 if (!NILP (Vscroll_preserve_screen_position
))
3986 start_display (&it
, w
, start
);
3987 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3988 preserve_y
= it
.current_y
;
3993 /* Move iterator it from start the specified distance forward or
3994 backward. The result is the new window start. */
3995 start_display (&it
, w
, start
);
3998 int screen_full
= (it
.last_visible_y
3999 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
4000 int direction
= n
< 0 ? -1 : 1;
4001 int dy
= direction
* screen_full
;
4003 /* Note that move_it_vertically always moves the iterator to the
4004 start of a line. So, if the last line doesn't have a newline,
4005 we would end up at the start of the line ending at ZV. */
4007 move_it_vertically_backward (&it
, -dy
);
4009 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4010 MOVE_TO_POS
| MOVE_TO_Y
);
4013 move_it_by_lines (&it
, n
, 1);
4015 /* End if we end up at ZV or BEGV. */
4016 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4017 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4019 if (IT_CHARPOS (it
) == ZV
)
4021 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4022 > it
.last_visible_y
)
4024 /* The last line was only partially visible, make it fully
4026 w
->vscroll
= (it
.last_visible_y
4027 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4028 adjust_glyphs (it
.f
);
4033 Fsignal (Qend_of_buffer
, Qnil
);
4037 if (w
->vscroll
!= 0)
4038 /* The first line was only partially visible, make it fully
4044 Fsignal (Qbeginning_of_buffer
, Qnil
);
4047 /* If control gets here, then we vscrolled. */
4049 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4051 /* Don't try to change the window start below. */
4057 /* Set the window start, and set up the window for redisplay. */
4058 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4060 w
->start_at_line_beg
= Fbolp ();
4061 w
->update_mode_line
= Qt
;
4062 XSETFASTINT (w
->last_modified
, 0);
4063 XSETFASTINT (w
->last_overlay_modified
, 0);
4064 /* Set force_start so that redisplay_window will run the
4065 window-scroll-functions. */
4066 w
->force_start
= Qt
;
4069 it
.current_y
= it
.vpos
= 0;
4071 /* Preserve the screen position if we must. */
4072 if (preserve_y
>= 0)
4074 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4075 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4079 /* Move PT out of scroll margins. */
4080 this_scroll_margin
= max (0, scroll_margin
);
4081 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4082 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4086 /* We moved the window start towards ZV, so PT may be now
4087 in the scroll margin at the top. */
4088 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4089 while (it
.current_y
< this_scroll_margin
)
4090 move_it_by_lines (&it
, 1, 1);
4091 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4095 int charpos
, bytepos
;
4097 /* We moved the window start towards BEGV, so PT may be now
4098 in the scroll margin at the bottom. */
4099 move_it_to (&it
, PT
, -1,
4100 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4101 MOVE_TO_POS
| MOVE_TO_Y
);
4103 /* Save our position, in case it's correct. */
4104 charpos
= IT_CHARPOS (it
);
4105 bytepos
= IT_BYTEPOS (it
);
4107 /* See if point is on a partially visible line at the end. */
4108 move_it_by_lines (&it
, 1, 1);
4109 if (it
.current_y
> it
.last_visible_y
)
4110 /* The last line was only partially visible, so back up two
4111 lines to make sure we're on a fully visible line. */
4113 move_it_by_lines (&it
, -2, 0);
4114 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4117 /* No, the position we saved is OK, so use it. */
4118 SET_PT_BOTH (charpos
, bytepos
);
4124 /* Implementation of window_scroll that works based on screen lines.
4125 See the comment of window_scroll for parameter descriptions. */
4128 window_scroll_line_based (window
, n
, whole
, noerror
)
4134 register struct window
*w
= XWINDOW (window
);
4135 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4136 register int pos
, pos_byte
;
4137 register int ht
= window_internal_height (w
);
4138 register Lisp_Object tem
;
4142 struct position posit
;
4145 startpos
= marker_position (w
->start
);
4147 posit
= *compute_motion (startpos
, 0, 0, 0,
4149 window_internal_width (w
), XINT (w
->hscroll
),
4151 original_vpos
= posit
.vpos
;
4153 XSETFASTINT (tem
, PT
);
4154 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4158 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4163 lose
= n
< 0 && PT
== BEGV
;
4164 Fvertical_motion (make_number (n
), window
);
4168 SET_PT_BOTH (opoint
, opoint_byte
);
4175 Fsignal (Qbeginning_of_buffer
, Qnil
);
4180 int this_scroll_margin
= scroll_margin
;
4182 /* Don't use a scroll margin that is negative or too large. */
4183 if (this_scroll_margin
< 0)
4184 this_scroll_margin
= 0;
4186 if (XINT (w
->height
) < 4 * scroll_margin
)
4187 this_scroll_margin
= XINT (w
->height
) / 4;
4189 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4190 w
->start_at_line_beg
= bolp
;
4191 w
->update_mode_line
= Qt
;
4192 XSETFASTINT (w
->last_modified
, 0);
4193 XSETFASTINT (w
->last_overlay_modified
, 0);
4194 /* Set force_start so that redisplay_window will run
4195 the window-scroll-functions. */
4196 w
->force_start
= Qt
;
4198 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4200 SET_PT_BOTH (pos
, pos_byte
);
4201 Fvertical_motion (make_number (original_vpos
), window
);
4203 /* If we scrolled forward, put point enough lines down
4204 that it is outside the scroll margin. */
4209 if (this_scroll_margin
> 0)
4211 SET_PT_BOTH (pos
, pos_byte
);
4212 Fvertical_motion (make_number (this_scroll_margin
), window
);
4218 if (top_margin
<= opoint
)
4219 SET_PT_BOTH (opoint
, opoint_byte
);
4220 else if (!NILP (Vscroll_preserve_screen_position
))
4222 SET_PT_BOTH (pos
, pos_byte
);
4223 Fvertical_motion (make_number (original_vpos
), window
);
4226 SET_PT (top_margin
);
4232 /* If we scrolled backward, put point near the end of the window
4233 but not within the scroll margin. */
4234 SET_PT_BOTH (pos
, pos_byte
);
4235 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4236 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4239 bottom_margin
= PT
+ 1;
4241 if (bottom_margin
> opoint
)
4242 SET_PT_BOTH (opoint
, opoint_byte
);
4245 if (!NILP (Vscroll_preserve_screen_position
))
4247 SET_PT_BOTH (pos
, pos_byte
);
4248 Fvertical_motion (make_number (original_vpos
), window
);
4251 Fvertical_motion (make_number (-1), window
);
4260 Fsignal (Qend_of_buffer
, Qnil
);
4265 /* Scroll selected_window up or down. If N is nil, scroll a
4266 screen-full which is defined as the height of the window minus
4267 next_screen_context_lines. If N is the symbol `-', scroll.
4268 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4269 up. This is the guts of Fscroll_up and Fscroll_down. */
4272 scroll_command (n
, direction
)
4276 register int defalt
;
4277 int count
= specpdl_ptr
- specpdl
;
4279 xassert (abs (direction
) == 1);
4281 /* If selected window's buffer isn't current, make it current for
4282 the moment. But don't screw up if window_scroll gets an error. */
4283 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4285 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4286 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4288 /* Make redisplay consider other windows than just selected_window. */
4289 ++windows_or_buffers_changed
;
4292 defalt
= (window_internal_height (XWINDOW (selected_window
))
4293 - next_screen_context_lines
);
4294 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4297 window_scroll (selected_window
, defalt
, 1, 0);
4298 else if (EQ (n
, Qminus
))
4299 window_scroll (selected_window
, - defalt
, 1, 0);
4302 n
= Fprefix_numeric_value (n
);
4303 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4306 unbind_to (count
, Qnil
);
4309 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4310 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4311 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4312 Negative ARG means scroll downward.\n\
4313 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4314 When calling from a program, supply as argument a number, nil, or `-'.")
4318 scroll_command (arg
, 1);
4322 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4323 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4324 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4325 Negative ARG means scroll upward.\n\
4326 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4327 When calling from a program, supply as argument a number, nil, or `-'.")
4331 scroll_command (arg
, -1);
4335 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4336 "Return the other window for \"other window scroll\" commands.\n\
4337 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4338 specifies the window.\n\
4339 If `other-window-scroll-buffer' is non-nil, a window\n\
4340 showing that buffer is used.")
4345 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4346 && !NILP (Vminibuf_scroll_window
))
4347 window
= Vminibuf_scroll_window
;
4348 /* If buffer is specified, scroll that buffer. */
4349 else if (!NILP (Vother_window_scroll_buffer
))
4351 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4353 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4357 /* Nothing specified; look for a neighboring window on the same
4359 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4361 if (EQ (window
, selected_window
))
4362 /* That didn't get us anywhere; look for a window on another
4365 window
= Fnext_window (window
, Qnil
, Qt
);
4366 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4367 && ! EQ (window
, selected_window
));
4370 CHECK_LIVE_WINDOW (window
, 0);
4372 if (EQ (window
, selected_window
))
4373 error ("There is no other window");
4378 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4379 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4380 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4381 The next window is the one below the current one; or the one at the top\n\
4382 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4383 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4384 When calling from a program, supply as argument a number, nil, or `-'.\n\
4386 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4387 specifies the window to scroll.\n\
4388 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4389 showing that buffer, popping the buffer up if necessary.")
4391 register Lisp_Object arg
;
4393 register Lisp_Object window
;
4394 register int defalt
;
4395 register struct window
*w
;
4396 register int count
= specpdl_ptr
- specpdl
;
4398 window
= Fother_window_for_scrolling ();
4400 w
= XWINDOW (window
);
4401 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4402 if (defalt
< 1) defalt
= 1;
4404 /* Don't screw up if window_scroll gets an error. */
4405 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4406 ++windows_or_buffers_changed
;
4408 Fset_buffer (w
->buffer
);
4409 SET_PT (marker_position (w
->pointm
));
4412 window_scroll (window
, defalt
, 1, 1);
4413 else if (EQ (arg
, Qminus
))
4414 window_scroll (window
, -defalt
, 1, 1);
4419 CHECK_NUMBER (arg
, 0);
4420 window_scroll (window
, XINT (arg
), 0, 1);
4423 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4424 unbind_to (count
, Qnil
);
4429 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4430 "Scroll selected window display ARG columns left.\n\
4431 Default for ARG is window width minus 2.")
4433 register Lisp_Object arg
;
4437 struct window
*w
= XWINDOW (selected_window
);
4440 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4442 arg
= Fprefix_numeric_value (arg
);
4444 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
4445 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4447 if (interactive_p (0))
4448 w
->min_hscroll
= w
->hscroll
;
4453 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4454 "Scroll selected window display ARG columns right.\n\
4455 Default for ARG is window width minus 2.")
4457 register Lisp_Object arg
;
4461 struct window
*w
= XWINDOW (selected_window
);
4464 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4466 arg
= Fprefix_numeric_value (arg
);
4468 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
4469 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4471 if (interactive_p (0))
4472 w
->min_hscroll
= w
->hscroll
;
4477 /* Value is the number of lines actually displayed in window W,
4478 as opposed to its height. */
4481 displayed_window_lines (w
)
4485 struct text_pos start
;
4486 int height
= window_box_height (w
);
4487 struct buffer
*old_buffer
;
4490 if (XBUFFER (w
->buffer
) != current_buffer
)
4492 old_buffer
= current_buffer
;
4493 set_buffer_internal (XBUFFER (w
->buffer
));
4498 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4499 start_display (&it
, w
, start
);
4500 move_it_vertically (&it
, height
);
4501 bottom_y
= line_bottom_y (&it
);
4503 /* Add in empty lines at the bottom of the window. */
4504 if (bottom_y
< height
)
4506 int uy
= CANON_Y_UNIT (it
.f
);
4507 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
4511 set_buffer_internal (old_buffer
);
4517 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4518 "Center point in window and redisplay frame.\n\
4519 With prefix argument ARG, recenter putting point on screen line ARG\n\
4520 relative to the current window. If ARG is negative, it counts up from the\n\
4521 bottom of the window. (ARG should be less than the height of the window.)\n\
4523 If ARG is omitted or nil, erase the entire frame and then\n\
4524 redraw with point in the center of the current window.\n\
4525 Just C-u as prefix means put point in the center of the window\n\
4526 and redisplay normally--don't erase and redraw the frame.")
4528 register Lisp_Object arg
;
4530 struct window
*w
= XWINDOW (selected_window
);
4531 struct buffer
*buf
= XBUFFER (w
->buffer
);
4532 struct buffer
*obuf
= current_buffer
;
4534 int charpos
, bytepos
;
4540 /* Invalidate pixel data calculated for all compositions. */
4541 for (i
= 0; i
< n_compositions
; i
++)
4542 composition_table
[i
]->font
= NULL
;
4544 Fredraw_frame (w
->frame
);
4545 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4548 else if (CONSP (arg
)) /* Just C-u. */
4552 arg
= Fprefix_numeric_value (arg
);
4553 CHECK_NUMBER (arg
, 0);
4556 set_buffer_internal (buf
);
4558 /* Handle centering on a gfaphical frame specially. Such frames can
4559 have variable-height lines and centering point on the basis of
4560 line counts would lead to strange effects. */
4561 if (center_p
&& FRAME_WINDOW_P (XFRAME (w
->frame
)))
4566 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4567 start_display (&it
, w
, pt
);
4568 move_it_vertically (&it
, - it
.last_visible_y
/ 2);
4569 charpos
= IT_CHARPOS (it
);
4570 bytepos
= IT_BYTEPOS (it
);
4574 struct position pos
;
4578 int ht
= displayed_window_lines (w
);
4579 arg
= make_number (ht
/ 2);
4581 else if (XINT (arg
) < 0)
4583 int ht
= displayed_window_lines (w
);
4584 XSETINT (arg
, XINT (arg
) + ht
);
4587 pos
= *vmotion (PT
, - XINT (arg
), w
);
4588 charpos
= pos
.bufpos
;
4589 bytepos
= pos
.bytepos
;
4592 /* Set the new window start. */
4593 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4594 w
->window_end_valid
= Qnil
;
4595 w
->force_start
= Qt
;
4596 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4597 w
->start_at_line_beg
= Qt
;
4599 w
->start_at_line_beg
= Qnil
;
4601 set_buffer_internal (obuf
);
4606 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4608 "Return the height in lines of the text display area of WINDOW.\n\
4609 This doesn't include the mode-line (or header-line if any) or any\n\
4610 partial-height lines in the text display area.")
4614 struct window
*w
= decode_window (window
);
4615 int pixel_height
= window_box_height (w
);
4616 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4617 return make_number (line_height
);
4622 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4624 "Position point relative to window.\n\
4625 With no argument, position point at center of window.\n\
4626 An argument specifies vertical position within the window;\n\
4627 zero means top of window, negative means relative to bottom of window.")
4631 struct window
*w
= XWINDOW (selected_window
);
4635 window
= selected_window
;
4636 start
= marker_position (w
->start
);
4637 if (start
< BEGV
|| start
> ZV
)
4639 int height
= window_internal_height (w
);
4640 Fvertical_motion (make_number (- (height
/ 2)), window
);
4641 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4642 w
->start_at_line_beg
= Fbolp ();
4643 w
->force_start
= Qt
;
4646 Fgoto_char (w
->start
);
4648 lines
= displayed_window_lines (w
);
4650 XSETFASTINT (arg
, lines
/ 2);
4653 arg
= Fprefix_numeric_value (arg
);
4655 XSETINT (arg
, XINT (arg
) + lines
);
4658 /* Skip past a partially visible first line. */
4660 XSETINT (arg
, XINT (arg
) + 1);
4662 return Fvertical_motion (arg
, window
);
4667 /***********************************************************************
4668 Window Configuration
4669 ***********************************************************************/
4671 struct save_window_data
4673 EMACS_INT size_from_Lisp_Vector_struct
;
4674 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4675 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4676 Lisp_Object frame_tool_bar_lines
;
4677 Lisp_Object selected_frame
;
4678 Lisp_Object current_window
;
4679 Lisp_Object current_buffer
;
4680 Lisp_Object minibuf_scroll_window
;
4681 Lisp_Object root_window
;
4682 Lisp_Object focus_frame
;
4683 /* Record the values of window-min-width and window-min-height
4684 so that window sizes remain consistent with them. */
4685 Lisp_Object min_width
, min_height
;
4686 /* A vector, each of whose elements is a struct saved_window
4688 Lisp_Object saved_windows
;
4691 /* This is saved as a Lisp_Vector */
4694 /* these first two must agree with struct Lisp_Vector in lisp.h */
4695 EMACS_INT size_from_Lisp_Vector_struct
;
4696 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4699 Lisp_Object buffer
, start
, pointm
, mark
;
4700 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4701 Lisp_Object parent
, prev
;
4702 Lisp_Object start_at_line_beg
;
4703 Lisp_Object display_table
;
4704 Lisp_Object orig_top
, orig_height
;
4707 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4709 #define SAVED_WINDOW_N(swv,n) \
4710 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4712 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4713 "Return t if OBJECT is a window-configuration object.")
4717 if (WINDOW_CONFIGURATIONP (object
))
4722 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4723 "Return the frame that CONFIG, a window-configuration object, is about.")
4727 register struct save_window_data
*data
;
4728 struct Lisp_Vector
*saved_windows
;
4730 if (! WINDOW_CONFIGURATIONP (config
))
4731 wrong_type_argument (Qwindow_configuration_p
, config
);
4733 data
= (struct save_window_data
*) XVECTOR (config
);
4734 saved_windows
= XVECTOR (data
->saved_windows
);
4735 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4738 DEFUN ("set-window-configuration", Fset_window_configuration
,
4739 Sset_window_configuration
, 1, 1, 0,
4740 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4741 CONFIGURATION must be a value previously returned\n\
4742 by `current-window-configuration' (which see).\n\
4743 If CONFIGURATION was made from a frame that is now deleted,\n\
4744 only frame-independent values can be restored. In this case,\n\
4745 the return value is nil. Otherwise the value is t.")
4747 Lisp_Object configuration
;
4749 register struct save_window_data
*data
;
4750 struct Lisp_Vector
*saved_windows
;
4751 Lisp_Object new_current_buffer
;
4756 while (!WINDOW_CONFIGURATIONP (configuration
))
4757 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4759 data
= (struct save_window_data
*) XVECTOR (configuration
);
4760 saved_windows
= XVECTOR (data
->saved_windows
);
4762 new_current_buffer
= data
->current_buffer
;
4763 if (NILP (XBUFFER (new_current_buffer
)->name
))
4764 new_current_buffer
= Qnil
;
4767 if (XBUFFER (new_current_buffer
) == current_buffer
)
4771 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4774 /* If f is a dead frame, don't bother rebuilding its window tree.
4775 However, there is other stuff we should still try to do below. */
4776 if (FRAME_LIVE_P (f
))
4778 register struct window
*w
;
4779 register struct saved_window
*p
;
4780 struct window
*root_window
;
4781 struct window
**leaf_windows
;
4785 /* If the frame has been resized since this window configuration was
4786 made, we change the frame to the size specified in the
4787 configuration, restore the configuration, and then resize it
4788 back. We keep track of the prevailing height in these variables. */
4789 int previous_frame_height
= FRAME_HEIGHT (f
);
4790 int previous_frame_width
= FRAME_WIDTH (f
);
4791 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4792 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4794 /* The mouse highlighting code could get screwed up
4795 if it runs during this. */
4798 if (XFASTINT (data
->frame_height
) != previous_frame_height
4799 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4800 change_frame_size (f
, XFASTINT (data
->frame_height
),
4801 XFASTINT (data
->frame_width
), 0, 0, 0);
4802 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4803 if (XFASTINT (data
->frame_menu_bar_lines
)
4804 != previous_frame_menu_bar_lines
)
4805 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4806 #ifdef HAVE_WINDOW_SYSTEM
4807 if (XFASTINT (data
->frame_tool_bar_lines
)
4808 != previous_frame_tool_bar_lines
)
4809 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4813 /* "Swap out" point from the selected window
4814 into its buffer. We do this now, before
4815 restoring the window contents, and prevent it from
4816 being done later on when we select a new window. */
4817 if (! NILP (XWINDOW (selected_window
)->buffer
))
4819 w
= XWINDOW (selected_window
);
4820 set_marker_both (w
->pointm
,
4822 BUF_PT (XBUFFER (w
->buffer
)),
4823 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4826 windows_or_buffers_changed
++;
4827 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4829 /* Problem: Freeing all matrices and later allocating them again
4830 is a serious redisplay flickering problem. What we would
4831 really like to do is to free only those matrices not reused
4833 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4835 = (struct window
**) alloca (count_windows (root_window
)
4836 * sizeof (struct window
*));
4837 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4839 /* Temporarily avoid any problems with windows that are smaller
4840 than they are supposed to be. */
4841 window_min_height
= 1;
4842 window_min_width
= 1;
4845 Mark all windows now on frame as "deleted".
4846 Restoring the new configuration "undeletes" any that are in it.
4848 Save their current buffers in their height fields, since we may
4849 need it later, if a buffer saved in the configuration is now
4851 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4853 for (k
= 0; k
< saved_windows
->size
; k
++)
4855 p
= SAVED_WINDOW_N (saved_windows
, k
);
4856 w
= XWINDOW (p
->window
);
4859 if (!NILP (p
->parent
))
4860 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4861 XFASTINT (p
->parent
))->window
;
4865 if (!NILP (p
->prev
))
4867 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4868 XFASTINT (p
->prev
))->window
;
4869 XWINDOW (w
->prev
)->next
= p
->window
;
4874 if (!NILP (w
->parent
))
4876 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4878 XWINDOW (w
->parent
)->vchild
= p
->window
;
4879 XWINDOW (w
->parent
)->hchild
= Qnil
;
4883 XWINDOW (w
->parent
)->hchild
= p
->window
;
4884 XWINDOW (w
->parent
)->vchild
= Qnil
;
4889 /* If we squirreled away the buffer in the window's height,
4891 if (BUFFERP (w
->height
))
4892 w
->buffer
= w
->height
;
4895 w
->width
= p
->width
;
4896 w
->height
= p
->height
;
4897 w
->hscroll
= p
->hscroll
;
4898 w
->min_hscroll
= p
->min_hscroll
;
4899 w
->display_table
= p
->display_table
;
4900 w
->orig_top
= p
->orig_top
;
4901 w
->orig_height
= p
->orig_height
;
4902 XSETFASTINT (w
->last_modified
, 0);
4903 XSETFASTINT (w
->last_overlay_modified
, 0);
4905 /* Reinstall the saved buffer and pointers into it. */
4906 if (NILP (p
->buffer
))
4907 w
->buffer
= p
->buffer
;
4910 if (!NILP (XBUFFER (p
->buffer
)->name
))
4911 /* If saved buffer is alive, install it. */
4913 w
->buffer
= p
->buffer
;
4914 w
->start_at_line_beg
= p
->start_at_line_beg
;
4915 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4916 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4917 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4918 p
->mark
, w
->buffer
);
4920 /* As documented in Fcurrent_window_configuration, don't
4921 save the location of point in the buffer which was current
4922 when the window configuration was recorded. */
4923 if (!EQ (p
->buffer
, new_current_buffer
)
4924 && XBUFFER (p
->buffer
) == current_buffer
)
4925 Fgoto_char (w
->pointm
);
4927 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4928 /* Else unless window has a live buffer, get one. */
4930 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4931 /* This will set the markers to beginning of visible
4933 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4934 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4935 w
->start_at_line_beg
= Qt
;
4938 /* Keeping window's old buffer; make sure the markers
4941 /* Set window markers at start of visible range. */
4942 if (XMARKER (w
->start
)->buffer
== 0)
4943 set_marker_restricted (w
->start
, make_number (0),
4945 if (XMARKER (w
->pointm
)->buffer
== 0)
4946 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4947 BUF_PT (XBUFFER (w
->buffer
)),
4948 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4949 w
->start_at_line_beg
= Qt
;
4954 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4955 /* Prevent "swapping out point" in the old selected window
4956 using the buffer that has been restored into it.
4957 That swapping out has already been done,
4958 near the beginning of this function. */
4959 selected_window
= Qnil
;
4960 Fselect_window (data
->current_window
);
4961 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4964 if (NILP (data
->focus_frame
)
4965 || (FRAMEP (data
->focus_frame
)
4966 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4967 Fredirect_frame_focus (frame
, data
->focus_frame
);
4969 #if 0 /* I don't understand why this is needed, and it causes problems
4970 when the frame's old selected window has been deleted. */
4971 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4972 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4976 /* Set the screen height to the value it had before this function. */
4977 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4978 || previous_frame_width
!= FRAME_WIDTH (f
))
4979 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4981 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4982 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4983 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4985 #ifdef HAVE_WINDOW_SYSTEM
4986 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4987 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4992 /* Now, free glyph matrices in windows that were not reused. */
4993 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4995 if (NILP (leaf_windows
[i
]->buffer
))
4997 /* Assert it's not reused as a combination. */
4998 xassert (NILP (leaf_windows
[i
]->hchild
)
4999 && NILP (leaf_windows
[i
]->vchild
));
5000 free_window_matrices (leaf_windows
[i
]);
5002 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5006 /* If more than one window shows the new and old current buffer,
5007 don't try to preserve point in that buffer. */
5008 if (old_point
> 0 && n
> 1)
5015 /* Fselect_window will have made f the selected frame, so we
5016 reselect the proper frame here. Fhandle_switch_frame will change the
5017 selected window too, but that doesn't make the call to
5018 Fselect_window above totally superfluous; it still sets f's
5020 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5021 do_switch_frame (data
->selected_frame
, Qnil
, 0);
5023 if (! NILP (Vwindow_configuration_change_hook
)
5024 && ! NILP (Vrun_hooks
))
5025 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5028 if (!NILP (new_current_buffer
))
5030 Fset_buffer (new_current_buffer
);
5032 /* If the buffer that is current now is the same
5033 that was current before setting the window configuration,
5034 don't alter its PT. */
5039 /* Restore the minimum heights recorded in the configuration. */
5040 window_min_height
= XINT (data
->min_height
);
5041 window_min_width
= XINT (data
->min_width
);
5043 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5045 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5048 /* Mark all windows now on frame as deleted
5049 by setting their buffers to nil. */
5052 delete_all_subwindows (w
)
5053 register struct window
*w
;
5055 if (!NILP (w
->next
))
5056 delete_all_subwindows (XWINDOW (w
->next
));
5057 if (!NILP (w
->vchild
))
5058 delete_all_subwindows (XWINDOW (w
->vchild
));
5059 if (!NILP (w
->hchild
))
5060 delete_all_subwindows (XWINDOW (w
->hchild
));
5062 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5064 if (!NILP (w
->buffer
))
5067 /* We set all three of these fields to nil, to make sure that we can
5068 distinguish this dead window from any live window. Live leaf
5069 windows will have buffer set, and combination windows will have
5070 vchild or hchild set. */
5075 Vwindow_list
= Qnil
;
5079 count_windows (window
)
5080 register struct window
*window
;
5082 register int count
= 1;
5083 if (!NILP (window
->next
))
5084 count
+= count_windows (XWINDOW (window
->next
));
5085 if (!NILP (window
->vchild
))
5086 count
+= count_windows (XWINDOW (window
->vchild
));
5087 if (!NILP (window
->hchild
))
5088 count
+= count_windows (XWINDOW (window
->hchild
));
5093 /* Fill vector FLAT with leaf windows under W, starting at index I.
5094 Value is last index + 1. */
5097 get_leaf_windows (w
, flat
, i
)
5099 struct window
**flat
;
5104 if (!NILP (w
->hchild
))
5105 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5106 else if (!NILP (w
->vchild
))
5107 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5111 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5118 /* Return a pointer to the glyph W's physical cursor is on. Value is
5119 null if W's current matrix is invalid, so that no meaningfull glyph
5123 get_phys_cursor_glyph (w
)
5126 struct glyph_row
*row
;
5127 struct glyph
*glyph
;
5129 if (w
->phys_cursor
.vpos
>= 0
5130 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5131 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5133 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5134 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5143 save_window_save (window
, vector
, i
)
5145 struct Lisp_Vector
*vector
;
5148 register struct saved_window
*p
;
5149 register struct window
*w
;
5150 register Lisp_Object tem
;
5152 for (;!NILP (window
); window
= w
->next
)
5154 p
= SAVED_WINDOW_N (vector
, i
);
5155 w
= XWINDOW (window
);
5157 XSETFASTINT (w
->temslot
, i
++);
5159 p
->buffer
= w
->buffer
;
5162 p
->width
= w
->width
;
5163 p
->height
= w
->height
;
5164 p
->hscroll
= w
->hscroll
;
5165 p
->min_hscroll
= w
->min_hscroll
;
5166 p
->display_table
= w
->display_table
;
5167 p
->orig_top
= w
->orig_top
;
5168 p
->orig_height
= w
->orig_height
;
5169 if (!NILP (w
->buffer
))
5171 /* Save w's value of point in the window configuration.
5172 If w is the selected window, then get the value of point
5173 from the buffer; pointm is garbage in the selected window. */
5174 if (EQ (window
, selected_window
))
5176 p
->pointm
= Fmake_marker ();
5177 set_marker_both (p
->pointm
, w
->buffer
,
5178 BUF_PT (XBUFFER (w
->buffer
)),
5179 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5182 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5184 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5185 p
->start_at_line_beg
= w
->start_at_line_beg
;
5187 tem
= XBUFFER (w
->buffer
)->mark
;
5188 p
->mark
= Fcopy_marker (tem
, Qnil
);
5195 p
->start_at_line_beg
= Qnil
;
5198 if (NILP (w
->parent
))
5201 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5206 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5208 if (!NILP (w
->vchild
))
5209 i
= save_window_save (w
->vchild
, vector
, i
);
5210 if (!NILP (w
->hchild
))
5211 i
= save_window_save (w
->hchild
, vector
, i
);
5217 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5218 Scurrent_window_configuration
, 0, 1, 0,
5219 "Return an object representing the current window configuration of FRAME.\n\
5220 If FRAME is nil or omitted, use the selected frame.\n\
5221 This describes the number of windows, their sizes and current buffers,\n\
5222 and for each displayed buffer, where display starts, and the positions of\n\
5223 point and mark. An exception is made for point in the current buffer:\n\
5224 its value is -not- saved.\n\
5225 This also records the currently selected frame, and FRAME's focus\n\
5226 redirection (see `redirect-frame-focus').")
5230 register Lisp_Object tem
;
5231 register int n_windows
;
5232 register struct save_window_data
*data
;
5233 register struct Lisp_Vector
*vec
;
5238 frame
= selected_frame
;
5239 CHECK_LIVE_FRAME (frame
, 0);
5242 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5243 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
5244 data
= (struct save_window_data
*)vec
;
5246 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5247 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5248 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5249 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5250 data
->selected_frame
= selected_frame
;
5251 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5252 XSETBUFFER (data
->current_buffer
, current_buffer
);
5253 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5254 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5255 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5256 XSETINT (data
->min_height
, window_min_height
);
5257 XSETINT (data
->min_width
, window_min_width
);
5258 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5259 data
->saved_windows
= tem
;
5260 for (i
= 0; i
< n_windows
; i
++)
5261 XVECTOR (tem
)->contents
[i
]
5262 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5263 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5264 XSETWINDOW_CONFIGURATION (tem
, data
);
5268 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5270 "Execute body, preserving window sizes and contents.\n\
5271 Restore which buffer appears in which window, where display starts,\n\
5272 and the value of point and mark for each window.\n\
5273 Also restore the choice of selected window.\n\
5274 Also restore which buffer is current.\n\
5275 Does not restore the value of point in current buffer.")
5279 register Lisp_Object val
;
5280 register int count
= specpdl_ptr
- specpdl
;
5282 record_unwind_protect (Fset_window_configuration
,
5283 Fcurrent_window_configuration (Qnil
));
5284 val
= Fprogn (args
);
5285 return unbind_to (count
, val
);
5289 /***********************************************************************
5291 ***********************************************************************/
5293 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5295 "Set width of marginal areas of window WINDOW.\n\
5296 If window is nil, set margins of the currently selected window.\n\
5297 First parameter LEFT-WIDTH specifies the number of character\n\
5298 cells to reserve for the left marginal area. Second parameter\n\
5299 RIGHT-WIDTH does the same for the right marginal area.\n\
5300 A nil width parameter means no margin.")
5301 (window
, left
, right
)
5302 Lisp_Object window
, left
, right
;
5304 struct window
*w
= decode_window (window
);
5307 CHECK_NUMBER_OR_FLOAT (left
, 1);
5309 CHECK_NUMBER_OR_FLOAT (right
, 2);
5311 /* Check widths < 0 and translate a zero width to nil.
5312 Margins that are too wide have to be checked elsewhere. */
5313 if ((INTEGERP (left
) && XINT (left
) < 0)
5314 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5315 XSETFASTINT (left
, 0);
5316 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5319 if ((INTEGERP (right
) && XINT (right
) < 0)
5320 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5321 XSETFASTINT (right
, 0);
5322 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5325 w
->left_margin_width
= left
;
5326 w
->right_margin_width
= right
;
5328 ++windows_or_buffers_changed
;
5329 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5334 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5336 "Get width of marginal areas of window WINDOW.\n\
5337 If WINDOW is omitted or nil, use the currently selected window.\n\
5338 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5339 If a marginal area does not exist, its width will be returned\n\
5344 struct window
*w
= decode_window (window
);
5345 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5350 /***********************************************************************
5352 ***********************************************************************/
5354 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5355 "Return the amount by which WINDOW is scrolled vertically.\n\
5356 Use the selected window if WINDOW is nil or omitted.\n\
5357 Value is a multiple of the canonical character height of WINDOW.")
5366 window
= selected_window
;
5368 CHECK_WINDOW (window
, 0);
5369 w
= XWINDOW (window
);
5370 f
= XFRAME (w
->frame
);
5372 if (FRAME_WINDOW_P (f
))
5373 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5375 result
= make_number (0);
5380 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5382 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5383 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5384 non-negative multiple of the canonical character height of WINDOW.")
5386 Lisp_Object window
, vscroll
;
5392 window
= selected_window
;
5394 CHECK_WINDOW (window
, 0);
5395 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5397 w
= XWINDOW (window
);
5398 f
= XFRAME (w
->frame
);
5400 if (FRAME_WINDOW_P (f
))
5402 int old_dy
= w
->vscroll
;
5404 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5405 w
->vscroll
= min (w
->vscroll
, 0);
5407 /* Adjust glyph matrix of the frame if the virtual display
5408 area becomes larger than before. */
5409 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5412 /* Prevent redisplay shortcuts. */
5413 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5416 return Fwindow_vscroll (window
);
5420 /* Call FN for all leaf windows on frame F. FN is called with the
5421 first argument being a pointer to the leaf window, and with
5422 additional argument USER_DATA. Stops when FN returns 0. */
5425 foreach_window (f
, fn
, user_data
)
5427 int (* fn
) P_ ((struct window
*, void *));
5430 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5434 /* Helper function for foreach_window. Call FN for all leaf windows
5435 reachable from W. FN is called with the first argument being a
5436 pointer to the leaf window, and with additional argument USER_DATA.
5437 Stop when FN returns 0. Value is 0 if stopped by FN. */
5440 foreach_window_1 (w
, fn
, user_data
)
5442 int (* fn
) P_ ((struct window
*, void *));
5447 for (cont
= 1; w
&& cont
;)
5449 if (!NILP (w
->hchild
))
5450 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5451 else if (!NILP (w
->vchild
))
5452 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5454 cont
= fn (w
, user_data
);
5456 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5463 /* Freeze or unfreeze the window start of W if unless it is a
5464 mini-window or the selected window. FREEZE_P non-null means freeze
5465 the window start. */
5468 freeze_window_start (w
, freeze_p
)
5472 if (w
== XWINDOW (selected_window
)
5473 || MINI_WINDOW_P (w
)
5474 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5475 && ! NILP (Vminibuf_scroll_window
)
5476 && w
== XWINDOW (Vminibuf_scroll_window
)))
5479 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5484 /* Freeze or unfreeze the window starts of all leaf windows on frame
5485 F, except the selected window and a mini-window. FREEZE_P non-zero
5486 means freeze the window start. */
5489 freeze_window_starts (f
, freeze_p
)
5493 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5497 /***********************************************************************
5499 ***********************************************************************/
5501 /* Return 1 if window configurations C1 and C2
5502 describe the same state of affairs. This is used by Fequal. */
5505 compare_window_configurations (c1
, c2
, ignore_positions
)
5507 int ignore_positions
;
5509 register struct save_window_data
*d1
, *d2
;
5510 struct Lisp_Vector
*sw1
, *sw2
;
5513 if (!WINDOW_CONFIGURATIONP (c1
))
5514 wrong_type_argument (Qwindow_configuration_p
, c1
);
5515 if (!WINDOW_CONFIGURATIONP (c2
))
5516 wrong_type_argument (Qwindow_configuration_p
, c2
);
5518 d1
= (struct save_window_data
*) XVECTOR (c1
);
5519 d2
= (struct save_window_data
*) XVECTOR (c2
);
5520 sw1
= XVECTOR (d1
->saved_windows
);
5521 sw2
= XVECTOR (d2
->saved_windows
);
5523 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5525 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5527 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5529 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5531 /* Don't compare the current_window field directly.
5532 Instead see w1_is_current and w2_is_current, below. */
5533 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5535 if (! ignore_positions
)
5536 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5538 /* Don't compare the root_window field.
5539 We don't require the two configurations
5540 to use the same window object,
5541 and the two root windows must be equivalent
5542 if everything else compares equal. */
5543 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5545 if (! EQ (d1
->min_width
, d2
->min_width
))
5547 if (! EQ (d1
->min_height
, d2
->min_height
))
5550 /* Verify that the two confis have the same number of windows. */
5551 if (sw1
->size
!= sw2
->size
)
5554 for (i
= 0; i
< sw1
->size
; i
++)
5556 struct saved_window
*p1
, *p2
;
5557 int w1_is_current
, w2_is_current
;
5559 p1
= SAVED_WINDOW_N (sw1
, i
);
5560 p2
= SAVED_WINDOW_N (sw2
, i
);
5562 /* Verify that the current windows in the two
5563 configurations correspond to each other. */
5564 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5565 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5567 if (w1_is_current
!= w2_is_current
)
5570 /* Verify that the corresponding windows do match. */
5571 if (! EQ (p1
->buffer
, p2
->buffer
))
5573 if (! EQ (p1
->left
, p2
->left
))
5575 if (! EQ (p1
->top
, p2
->top
))
5577 if (! EQ (p1
->width
, p2
->width
))
5579 if (! EQ (p1
->height
, p2
->height
))
5581 if (! EQ (p1
->display_table
, p2
->display_table
))
5583 if (! EQ (p1
->parent
, p2
->parent
))
5585 if (! EQ (p1
->prev
, p2
->prev
))
5587 if (! ignore_positions
)
5589 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5591 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5593 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5595 if (NILP (Fequal (p1
->start
, p2
->start
)))
5597 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5599 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5607 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5608 Scompare_window_configurations
, 2, 2, 0,
5609 "Compare two window configurations as regards the structure of windows.\n\
5610 This function ignores details such as the values of point and mark\n\
5611 and scrolling positions.")
5615 if (compare_window_configurations (x
, y
, 1))
5623 struct frame
*f
= make_terminal_frame ();
5624 XSETFRAME (selected_frame
, f
);
5625 Vterminal_frame
= selected_frame
;
5626 minibuf_window
= f
->minibuffer_window
;
5627 selected_window
= f
->selected_window
;
5628 last_nonminibuf_frame
= f
;
5630 window_initialized
= 1;
5636 Vwindow_list
= Qnil
;
5642 Qleft_fringe
= intern ("left-fringe");
5643 staticpro (&Qleft_fringe
);
5644 Qright_fringe
= intern ("right-fringe");
5645 staticpro (&Qright_fringe
);
5647 Qwindow_size_fixed
= intern ("window-size-fixed");
5648 staticpro (&Qwindow_size_fixed
);
5650 staticpro (&Qwindow_configuration_change_hook
);
5651 Qwindow_configuration_change_hook
5652 = intern ("window-configuration-change-hook");
5654 Qwindowp
= intern ("windowp");
5655 staticpro (&Qwindowp
);
5657 Qwindow_configuration_p
= intern ("window-configuration-p");
5658 staticpro (&Qwindow_configuration_p
);
5660 Qwindow_live_p
= intern ("window-live-p");
5661 staticpro (&Qwindow_live_p
);
5663 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5664 staticpro (&Qtemp_buffer_show_hook
);
5666 staticpro (&Vwindow_list
);
5668 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5669 "Non-nil means call as function to display a help buffer.\n\
5670 The function is called with one argument, the buffer to be displayed.\n\
5671 Used by `with-output-to-temp-buffer'.\n\
5672 If this function is used, then it must do the entire job of showing\n\
5673 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5674 Vtemp_buffer_show_function
= Qnil
;
5676 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5677 "If non-nil, function to call to handle `display-buffer'.\n\
5678 It will receive two args, the buffer and a flag which if non-nil means\n\
5679 that the currently selected window is not acceptable.\n\
5680 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5681 work using this function.");
5682 Vdisplay_buffer_function
= Qnil
;
5684 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5685 "*If non-nil, `display-buffer' should even the window heights.\n\
5686 If nil, `display-buffer' will leave the window configuration alone.");
5687 Veven_window_heights
= Qt
;
5689 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5690 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5691 Vminibuf_scroll_window
= Qnil
;
5693 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5694 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5695 Vother_window_scroll_buffer
= Qnil
;
5697 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5698 "*Non-nil means `display-buffer' should make a separate frame.");
5701 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5702 "*Non-nil means `display-buffer' should reuse frames.\n\
5703 If the buffer in question is already displayed in a frame, raise that frame.");
5704 display_buffer_reuse_frames
= 0;
5706 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5707 "Function to call to handle automatic new frame creation.\n\
5708 It is called with no arguments and should return a newly created frame.\n\
5710 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5711 where `pop-up-frame-alist' would hold the default frame parameters.");
5712 Vpop_up_frame_function
= Qnil
;
5714 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5715 "*List of buffer names that should have their own special frames.\n\
5716 Displaying a buffer whose name is in this list makes a special frame for it\n\
5717 using `special-display-function'. See also `special-display-regexps'.\n\
5719 An element of the list can be a list instead of just a string.\n\
5720 There are two ways to use a list as an element:\n\
5721 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5722 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5723 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5724 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5725 All this is done by the function found in `special-display-function'.\n\
5727 If this variable appears \"not to work\", because you add a name to it\n\
5728 but that buffer still appears in the selected window, look at the\n\
5729 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5730 Those variables take precedence over this one.");
5731 Vspecial_display_buffer_names
= Qnil
;
5733 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5734 "*List of regexps saying which buffers should have their own special frames.\n\
5735 If a buffer name matches one of these regexps, it gets its own frame.\n\
5736 Displaying a buffer whose name is in this list makes a special frame for it\n\
5737 using `special-display-function'.\n\
5739 An element of the list can be a list instead of just a string.\n\
5740 There are two ways to use a list as an element:\n\
5741 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5742 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5743 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5744 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5745 All this is done by the function found in `special-display-function'.\n\
5747 If this variable appears \"not to work\", because you add a regexp to it\n\
5748 but the matching buffers still appear in the selected window, look at the\n\
5749 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5750 Those variables take precedence over this one.");
5751 Vspecial_display_regexps
= Qnil
;
5753 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5754 "Function to call to make a new frame for a special buffer.\n\
5755 It is called with two arguments, the buffer and optional buffer specific\n\
5756 data, and should return a window displaying that buffer.\n\
5757 The default value makes a separate frame for the buffer,\n\
5758 using `special-display-frame-alist' to specify the frame parameters.\n\
5760 A buffer is special if its is listed in `special-display-buffer-names'\n\
5761 or matches a regexp in `special-display-regexps'.");
5762 Vspecial_display_function
= Qnil
;
5764 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5765 "*List of buffer names that should appear in the selected window.\n\
5766 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5767 switches to it in the selected window, rather than making it appear\n\
5768 in some other window.\n\
5770 An element of the list can be a cons cell instead of just a string.\n\
5771 Then the car must be a string, which specifies the buffer name.\n\
5772 This is for compatibility with `special-display-buffer-names';\n\
5773 the cdr of the cons cell is ignored.\n\
5775 See also `same-window-regexps'.");
5776 Vsame_window_buffer_names
= Qnil
;
5778 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5779 "*List of regexps saying which buffers should appear in the selected window.\n\
5780 If a buffer name matches one of these regexps, then displaying it\n\
5781 using `display-buffer' or `pop-to-buffer' switches to it\n\
5782 in the selected window, rather than making it appear in some other window.\n\
5784 An element of the list can be a cons cell instead of just a string.\n\
5785 Then the car must be a string, which specifies the buffer name.\n\
5786 This is for compatibility with `special-display-buffer-names';\n\
5787 the cdr of the cons cell is ignored.\n\
5789 See also `same-window-buffer-names'.");
5790 Vsame_window_regexps
= Qnil
;
5792 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5793 "*Non-nil means display-buffer should make new windows.");
5796 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5797 "*Number of lines of continuity when scrolling by screenfuls.");
5798 next_screen_context_lines
= 2;
5800 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5801 "*display-buffer would prefer to split the largest window if this large.\n\
5802 If there is only one window, it is split regardless of this value.");
5803 split_height_threshold
= 500;
5805 DEFVAR_INT ("window-min-height", &window_min_height
,
5806 "*Delete any window less than this tall (including its mode line).");
5807 window_min_height
= 4;
5809 DEFVAR_INT ("window-min-width", &window_min_width
,
5810 "*Delete any window less than this wide.");
5811 window_min_width
= 10;
5813 DEFVAR_LISP ("scroll-preserve-screen-position",
5814 &Vscroll_preserve_screen_position
,
5815 "*Non-nil means scroll commands move point to keep its screen line unchanged.");
5816 Vscroll_preserve_screen_position
= Qnil
;
5818 DEFVAR_LISP ("window-configuration-change-hook",
5819 &Vwindow_configuration_change_hook
,
5820 "Functions to call when window configuration changes.\n\
5821 The selected frame is the one whose configuration has changed.");
5822 Vwindow_configuration_change_hook
= Qnil
;
5824 DEFVAR_BOOL ("window-size-fixed", &window_size_fixed
,
5825 "Non-nil in a buffer means windows displaying the buffer are fixed-size.\n\
5826 Emacs won't change the size of any window displaying that buffer,\n\
5827 unless you explicitly change the size, or Emacs has no other choice.\n\
5828 This variable automatically becomes buffer-local when set.");
5829 Fmake_variable_buffer_local (Qwindow_size_fixed
);
5830 window_size_fixed
= 0;
5832 defsubr (&Sselected_window
);
5833 defsubr (&Sminibuffer_window
);
5834 defsubr (&Swindow_minibuffer_p
);
5835 defsubr (&Swindowp
);
5836 defsubr (&Swindow_live_p
);
5837 defsubr (&Spos_visible_in_window_p
);
5838 defsubr (&Swindow_buffer
);
5839 defsubr (&Swindow_height
);
5840 defsubr (&Swindow_width
);
5841 defsubr (&Swindow_hscroll
);
5842 defsubr (&Sset_window_hscroll
);
5843 defsubr (&Swindow_redisplay_end_trigger
);
5844 defsubr (&Sset_window_redisplay_end_trigger
);
5845 defsubr (&Swindow_edges
);
5846 defsubr (&Scoordinates_in_window_p
);
5847 defsubr (&Swindow_at
);
5848 defsubr (&Swindow_point
);
5849 defsubr (&Swindow_start
);
5850 defsubr (&Swindow_end
);
5851 defsubr (&Sset_window_point
);
5852 defsubr (&Sset_window_start
);
5853 defsubr (&Swindow_dedicated_p
);
5854 defsubr (&Sset_window_dedicated_p
);
5855 defsubr (&Swindow_display_table
);
5856 defsubr (&Sset_window_display_table
);
5857 defsubr (&Snext_window
);
5858 defsubr (&Sprevious_window
);
5859 defsubr (&Sother_window
);
5860 defsubr (&Sget_lru_window
);
5861 defsubr (&Sget_largest_window
);
5862 defsubr (&Sget_buffer_window
);
5863 defsubr (&Sdelete_other_windows
);
5864 defsubr (&Sdelete_windows_on
);
5865 defsubr (&Sreplace_buffer_in_windows
);
5866 defsubr (&Sdelete_window
);
5867 defsubr (&Sset_window_buffer
);
5868 defsubr (&Sselect_window
);
5869 defsubr (&Sspecial_display_p
);
5870 defsubr (&Ssame_window_p
);
5871 defsubr (&Sdisplay_buffer
);
5872 defsubr (&Ssplit_window
);
5873 defsubr (&Senlarge_window
);
5874 defsubr (&Sshrink_window
);
5875 defsubr (&Sscroll_up
);
5876 defsubr (&Sscroll_down
);
5877 defsubr (&Sscroll_left
);
5878 defsubr (&Sscroll_right
);
5879 defsubr (&Sother_window_for_scrolling
);
5880 defsubr (&Sscroll_other_window
);
5881 defsubr (&Srecenter
);
5882 defsubr (&Swindow_text_height
);
5883 defsubr (&Smove_to_window_line
);
5884 defsubr (&Swindow_configuration_p
);
5885 defsubr (&Swindow_configuration_frame
);
5886 defsubr (&Sset_window_configuration
);
5887 defsubr (&Scurrent_window_configuration
);
5888 defsubr (&Ssave_window_excursion
);
5889 defsubr (&Sset_window_margins
);
5890 defsubr (&Swindow_margins
);
5891 defsubr (&Swindow_vscroll
);
5892 defsubr (&Sset_window_vscroll
);
5893 defsubr (&Scompare_window_configurations
);
5894 defsubr (&Swindow_list
);
5900 initial_define_key (control_x_map
, '1', "delete-other-windows");
5901 initial_define_key (control_x_map
, '2', "split-window");
5902 initial_define_key (control_x_map
, '0', "delete-window");
5903 initial_define_key (control_x_map
, 'o', "other-window");
5904 initial_define_key (control_x_map
, '^', "enlarge-window");
5905 initial_define_key (control_x_map
, '<', "scroll-left");
5906 initial_define_key (control_x_map
, '>', "scroll-right");
5908 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5909 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5910 initial_define_key (meta_map
, 'v', "scroll-down");
5912 initial_define_key (global_map
, Ctl('L'), "recenter");
5913 initial_define_key (meta_map
, 'r', "move-to-window-line");