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 move_it_past_eol (&it
);
934 value
= make_number (IT_CHARPOS (it
));
937 set_buffer_internal (old_buffer
);
940 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
945 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
946 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
948 Lisp_Object window
, pos
;
950 register struct window
*w
= decode_window (window
);
952 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
953 if (w
== XWINDOW (selected_window
)
954 && XBUFFER (w
->buffer
) == current_buffer
)
957 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
959 /* We have to make sure that redisplay updates the window to show
960 the new value of point. */
961 if (!EQ (window
, selected_window
))
962 ++windows_or_buffers_changed
;
967 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
968 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
969 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
970 from overriding motion of point in order to display at this exact start.")
971 (window
, pos
, noforce
)
972 Lisp_Object window
, pos
, noforce
;
974 register struct window
*w
= decode_window (window
);
976 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
977 set_marker_restricted (w
->start
, pos
, w
->buffer
);
978 /* this is not right, but much easier than doing what is right. */
979 w
->start_at_line_beg
= Qnil
;
982 w
->update_mode_line
= Qt
;
983 XSETFASTINT (w
->last_modified
, 0);
984 XSETFASTINT (w
->last_overlay_modified
, 0);
985 if (!EQ (window
, selected_window
))
986 windows_or_buffers_changed
++;
991 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
993 "Return WINDOW's dedicated object, usually t or nil.\n\
994 See also `set-window-dedicated-p'.")
998 return decode_window (window
)->dedicated
;
1001 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1002 Sset_window_dedicated_p
, 2, 2, 0,
1003 "Control whether WINDOW is dedicated to the buffer it displays.\n\
1004 If it is dedicated, Emacs will not automatically change\n\
1005 which buffer appears in it.\n\
1006 The second argument is the new value for the dedication flag;\n\
1007 non-nil means yes.")
1009 Lisp_Object window
, arg
;
1011 register struct window
*w
= decode_window (window
);
1014 w
->dedicated
= Qnil
;
1018 return w
->dedicated
;
1021 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1023 "Return the display-table that WINDOW is using.")
1027 return decode_window (window
)->display_table
;
1030 /* Get the display table for use on window W. This is either W's
1031 display table or W's buffer's display table. Ignore the specified
1032 tables if they are not valid; if no valid table is specified,
1035 struct Lisp_Char_Table
*
1036 window_display_table (w
)
1039 struct Lisp_Char_Table
*dp
= NULL
;
1041 if (DISP_TABLE_P (w
->display_table
))
1042 dp
= XCHAR_TABLE (w
->display_table
);
1043 else if (BUFFERP (w
->buffer
))
1045 struct buffer
*b
= XBUFFER (w
->buffer
);
1047 if (DISP_TABLE_P (b
->display_table
))
1048 dp
= XCHAR_TABLE (b
->display_table
);
1049 else if (DISP_TABLE_P (Vstandard_display_table
))
1050 dp
= XCHAR_TABLE (Vstandard_display_table
);
1056 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1057 "Set WINDOW's display-table to TABLE.")
1059 register Lisp_Object window
, table
;
1061 register struct window
*w
;
1063 w
= decode_window (window
);
1064 w
->display_table
= table
;
1068 /* Record info on buffer window w is displaying
1069 when it is about to cease to display that buffer. */
1072 register struct window
*w
;
1079 if (b
!= XMARKER (w
->pointm
)->buffer
)
1083 if (w
== XWINDOW (selected_window
)
1084 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1085 /* Do this except when the selected window's buffer
1086 is being removed from some other window. */
1088 /* last_window_start records the start position that this buffer
1089 had in the last window to be disconnected from it.
1090 Now that this statement is unconditional,
1091 it is possible for the buffer to be displayed in the
1092 selected window, while last_window_start reflects another
1093 window which was recently showing the same buffer.
1094 Some people might say that might be a good thing. Let's see. */
1095 b
->last_window_start
= marker_position (w
->start
);
1097 /* Point in the selected window's buffer
1098 is actually stored in that buffer, and the window's pointm isn't used.
1099 So don't clobber point in that buffer. */
1100 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1101 /* This line helps to fix Horsley's testbug.el bug. */
1102 && !(WINDOWP (b
->last_selected_window
)
1103 && w
!= XWINDOW (b
->last_selected_window
)
1104 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1105 temp_set_point_both (b
,
1106 clip_to_bounds (BUF_BEGV (b
),
1107 XMARKER (w
->pointm
)->charpos
,
1109 clip_to_bounds (BUF_BEGV_BYTE (b
),
1110 marker_byte_position (w
->pointm
),
1113 if (WINDOWP (b
->last_selected_window
)
1114 && w
== XWINDOW (b
->last_selected_window
))
1115 b
->last_selected_window
= Qnil
;
1118 /* Put replacement into the window structure in place of old. */
1120 replace_window (old
, replacement
)
1121 Lisp_Object old
, replacement
;
1123 register Lisp_Object tem
;
1124 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1126 /* If OLD is its frame's root_window, then replacement is the new
1127 root_window for that frame. */
1129 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1130 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1134 p
->width
= o
->width
;
1135 p
->height
= o
->height
;
1136 p
->desired_matrix
= p
->current_matrix
= 0;
1138 bzero (&p
->cursor
, sizeof (p
->cursor
));
1139 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1140 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1141 p
->phys_cursor_type
= -1;
1142 p
->must_be_updated_p
= 0;
1143 p
->pseudo_window_p
= 0;
1144 XSETFASTINT (p
->window_end_vpos
, 0);
1145 XSETFASTINT (p
->window_end_pos
, 0);
1146 p
->window_end_valid
= Qnil
;
1147 p
->frozen_window_start_p
= 0;
1148 p
->orig_top
= p
->orig_height
= Qnil
;
1150 p
->next
= tem
= o
->next
;
1152 XWINDOW (tem
)->prev
= replacement
;
1154 p
->prev
= tem
= o
->prev
;
1156 XWINDOW (tem
)->next
= replacement
;
1158 p
->parent
= tem
= o
->parent
;
1161 if (EQ (XWINDOW (tem
)->vchild
, old
))
1162 XWINDOW (tem
)->vchild
= replacement
;
1163 if (EQ (XWINDOW (tem
)->hchild
, old
))
1164 XWINDOW (tem
)->hchild
= replacement
;
1167 /*** Here, if replacement is a vertical combination
1168 and so is its new parent, we should make replacement's
1169 children be children of that parent instead. ***/
1172 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1173 "Remove WINDOW from the display. Default is selected window.")
1175 register Lisp_Object window
;
1177 delete_window (window
);
1179 if (! NILP (Vwindow_configuration_change_hook
)
1180 && ! NILP (Vrun_hooks
))
1181 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1187 delete_window (window
)
1188 register Lisp_Object window
;
1190 register Lisp_Object tem
, parent
, sib
;
1191 register struct window
*p
;
1192 register struct window
*par
;
1195 /* Because this function is called by other C code on non-leaf
1196 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1197 so we can't decode_window here. */
1199 window
= selected_window
;
1201 CHECK_WINDOW (window
, 0);
1202 p
= XWINDOW (window
);
1204 /* It's okay to delete an already-deleted window. */
1205 if (NILP (p
->buffer
)
1207 && NILP (p
->vchild
))
1212 error ("Attempt to delete minibuffer or sole ordinary window");
1213 par
= XWINDOW (parent
);
1215 windows_or_buffers_changed
++;
1216 Vwindow_list
= Qnil
;
1217 f
= XFRAME (WINDOW_FRAME (p
));
1218 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1220 /* Are we trying to delete any frame's selected window? */
1222 Lisp_Object pwindow
;
1224 /* See if the frame's selected window is either WINDOW
1225 or any subwindow of it, by finding all that window's parents
1226 and comparing each one with WINDOW. */
1227 pwindow
= FRAME_SELECTED_WINDOW (f
);
1229 while (!NILP (pwindow
))
1231 if (EQ (window
, pwindow
))
1233 pwindow
= XWINDOW (pwindow
)->parent
;
1236 if (EQ (window
, pwindow
))
1238 Lisp_Object alternative
;
1239 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1241 /* If we're about to delete the selected window on the
1242 selected frame, then we should use Fselect_window to select
1243 the new window. On the other hand, if we're about to
1244 delete the selected window on any other frame, we shouldn't do
1245 anything but set the frame's selected_window slot. */
1246 if (EQ (window
, selected_window
))
1247 Fselect_window (alternative
);
1249 FRAME_SELECTED_WINDOW (f
) = alternative
;
1254 /* tem is null for dummy parent windows
1255 (which have inferiors but not any contents themselves) */
1259 unchain_marker (p
->pointm
);
1260 unchain_marker (p
->start
);
1263 /* Free window glyph matrices. It is sure that they are allocated
1264 again when ADJUST_GLYPHS is called. Block input so that expose
1265 events and other events that access glyph matrices are not
1266 processed while we are changing them. */
1268 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1272 XWINDOW (tem
)->prev
= p
->prev
;
1276 XWINDOW (tem
)->next
= p
->next
;
1278 if (EQ (window
, par
->hchild
))
1279 par
->hchild
= p
->next
;
1280 if (EQ (window
, par
->vchild
))
1281 par
->vchild
= p
->next
;
1283 /* Find one of our siblings to give our space to. */
1287 /* If p gives its space to its next sibling, that sibling needs
1288 to have its top/left side pulled back to where p's is.
1289 set_window_{height,width} will re-position the sibling's
1292 XWINDOW (sib
)->top
= p
->top
;
1293 XWINDOW (sib
)->left
= p
->left
;
1296 /* Stretch that sibling. */
1297 if (!NILP (par
->vchild
))
1298 set_window_height (sib
,
1299 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1301 if (!NILP (par
->hchild
))
1302 set_window_width (sib
,
1303 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1306 /* If parent now has only one child,
1307 put the child into the parent's place. */
1311 if (NILP (XWINDOW (tem
)->next
))
1312 replace_window (parent
, tem
);
1314 /* Since we may be deleting combination windows, we must make sure that
1315 not only p but all its children have been marked as deleted. */
1316 if (! NILP (p
->hchild
))
1317 delete_all_subwindows (XWINDOW (p
->hchild
));
1318 else if (! NILP (p
->vchild
))
1319 delete_all_subwindows (XWINDOW (p
->vchild
));
1321 /* Mark this window as deleted. */
1322 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1324 /* Adjust glyph matrices. */
1331 /***********************************************************************
1333 ***********************************************************************/
1335 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1336 pointer. This is a callback function for foreach_window, used in
1337 function window_list. */
1340 add_window_to_list (w
, user_data
)
1344 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1346 XSETWINDOW (window
, w
);
1347 *list
= Fcons (window
, *list
);
1352 /* Return a list of all windows, for use by next_window. If
1353 Vwindow_list is a list, return that list. Otherwise, build a new
1354 list, cache it in Vwindow_list, and return that. */
1359 if (!CONSP (Vwindow_list
))
1363 Vwindow_list
= Qnil
;
1364 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1366 Lisp_Object args
[2];
1368 /* We are visiting windows in canonical order, and add
1369 new windows at the front of args[1], which means we
1370 have to reverse this list at the end. */
1372 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1373 args
[0] = Vwindow_list
;
1374 args
[1] = Fnreverse (args
[1]);
1375 Vwindow_list
= Fnconc (2, args
);
1379 return Vwindow_list
;
1383 /* Value is non-zero if WINDOW satisfies the constraints given by
1384 OWINDOW, MINIBUF and ALL_FRAMES.
1386 MINIBUF t means WINDOW may be minibuffer windows.
1387 `lambda' means WINDOW may not be a minibuffer window.
1388 a window means a specific minibuffer window
1390 ALL_FRAMES t means search all frames,
1391 nil means search just current frame,
1392 `visible' means search just visible frames,
1393 0 means search visible and iconified frames,
1394 a window means search the frame that window belongs to,
1395 a frame means consider windows on that frame, only. */
1398 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1399 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1401 struct window
*w
= XWINDOW (window
);
1402 struct frame
*f
= XFRAME (w
->frame
);
1403 int candidate_p
= 1;
1405 if (!BUFFERP (w
->buffer
))
1407 else if (MINI_WINDOW_P (w
)
1408 && (EQ (minibuf
, Qlambda
)
1409 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1411 /* If MINIBUF is `lambda' don't consider any mini-windows.
1412 If it is a window, consider only that one. */
1415 else if (EQ (all_frames
, Qt
))
1417 else if (NILP (all_frames
))
1419 xassert (WINDOWP (owindow
));
1420 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1422 else if (EQ (all_frames
, Qvisible
))
1424 FRAME_SAMPLE_VISIBILITY (f
);
1425 candidate_p
= FRAME_VISIBLE_P (f
);
1427 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1429 FRAME_SAMPLE_VISIBILITY (f
);
1430 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1432 else if (WINDOWP (all_frames
))
1433 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1434 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1435 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1436 else if (FRAMEP (all_frames
))
1437 candidate_p
= EQ (all_frames
, w
->frame
);
1443 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1444 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1448 decode_next_window_args (window
, minibuf
, all_frames
)
1449 Lisp_Object
*window
, *minibuf
, *all_frames
;
1452 *window
= selected_window
;
1454 CHECK_LIVE_WINDOW (*window
, 0);
1456 /* MINIBUF nil may or may not include minibuffers. Decide if it
1458 if (NILP (*minibuf
))
1459 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1460 else if (!EQ (*minibuf
, Qt
))
1463 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1464 => count none of them, or a specific minibuffer window (the
1465 active one) to count. */
1467 /* ALL_FRAMES nil doesn't specify which frames to include. */
1468 if (NILP (*all_frames
))
1469 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1470 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1472 else if (EQ (*all_frames
, Qvisible
))
1474 else if (XFASTINT (*all_frames
) == 0)
1476 else if (FRAMEP (*all_frames
))
1478 else if (!EQ (*all_frames
, Qt
))
1481 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1482 search just current frame, `visible' meaning search just visible
1483 frames, 0 meaning search visible and iconified frames, or a
1484 window, meaning search the frame that window belongs to, or a
1485 frame, meaning consider windows on that frame, only. */
1489 /* Return the next or previous window of WINDOW in canonical ordering
1490 of windows. NEXT_P non-zero means return the next window. See the
1491 documentation string of next-window for the meaning of MINIBUF and
1495 next_window (window
, minibuf
, all_frames
, next_p
)
1496 Lisp_Object window
, minibuf
, all_frames
;
1499 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1501 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1502 return the first window on the frame. */
1503 if (FRAMEP (all_frames
)
1504 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1505 return Fframe_first_window (all_frames
);
1511 /* Find WINDOW in the list of all windows. */
1512 list
= Fmemq (window
, window_list ());
1514 /* Scan forward from WINDOW to the end of the window list. */
1516 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1517 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1520 /* Scan from the start of the window list up to WINDOW. */
1522 for (list
= Vwindow_list
;
1523 CONSP (list
) && !EQ (XCAR (list
), window
);
1525 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1529 window
= XCAR (list
);
1533 Lisp_Object candidate
, list
;
1535 /* Scan through the list of windows for candidates. If there are
1536 candidate windows in front of WINDOW, the last one of these
1537 is the one we want. If there are candidates following WINDOW
1538 in the list, again the last one of these is the one we want. */
1540 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1542 if (EQ (XCAR (list
), window
))
1544 if (WINDOWP (candidate
))
1547 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1549 candidate
= XCAR (list
);
1552 if (WINDOWP (candidate
))
1560 /* This comment supplies the doc string for `next-window',
1561 for make-docfile to see. We cannot put this in the real DEFUN
1562 due to limits in the Unix cpp.
1564 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1565 "Return next window after WINDOW in canonical ordering of windows.\n\
1566 If omitted, WINDOW defaults to the selected window.\n\
1568 Optional second arg MINIBUF t means count the minibuffer window even\n\
1569 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1570 it is active. MINIBUF neither t nor nil means not to count the\n\
1571 minibuffer even if it is active.\n\
1573 Several frames may share a single minibuffer; if the minibuffer\n\
1574 counts, all windows on all frames that share that minibuffer count\n\
1575 too. Therefore, `next-window' can be used to iterate through the\n\
1576 set of windows even when the minibuffer is on another frame. If the\n\
1577 minibuffer does not count, only windows from WINDOW's frame count.\n\
1579 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1580 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1581 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1582 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1583 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1584 Anything else means restrict to WINDOW's frame.\n\
1586 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1587 `next-window' to iterate through the entire cycle of acceptable\n\
1588 windows, eventually ending up back at the window you started with.\n\
1589 `previous-window' traverses the same cycle, in the reverse order.")
1590 (window, minibuf, all_frames) */
1592 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1594 (window
, minibuf
, all_frames
)
1595 Lisp_Object window
, minibuf
, all_frames
;
1597 return next_window (window
, minibuf
, all_frames
, 1);
1601 /* This comment supplies the doc string for `previous-window',
1602 for make-docfile to see. We cannot put this in the real DEFUN
1603 due to limits in the Unix cpp.
1605 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1606 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1607 If omitted, WINDOW defaults to the selected window.\n\
1609 Optional second arg MINIBUF t means count the minibuffer window even\n\
1610 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1611 it is active. MINIBUF neither t nor nil means not to count the\n\
1612 minibuffer even if it is active.\n\
1614 Several frames may share a single minibuffer; if the minibuffer\n\
1615 counts, all windows on all frames that share that minibuffer count\n\
1616 too. Therefore, `previous-window' can be used to iterate through\n\
1617 the set of windows even when the minibuffer is on another frame. If\n\
1618 the minibuffer does not count, only windows from WINDOW's frame count\n\
1620 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1621 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1622 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1623 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1624 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1625 Anything else means restrict to WINDOW's frame.\n\
1627 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1628 `previous-window' to iterate through the entire cycle of acceptable\n\
1629 windows, eventually ending up back at the window you started with.\n\
1630 `next-window' traverses the same cycle, in the reverse order.")
1631 (window, minibuf, all_frames) */
1634 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1636 (window
, minibuf
, all_frames
)
1637 Lisp_Object window
, minibuf
, all_frames
;
1639 return next_window (window
, minibuf
, all_frames
, 0);
1643 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1644 "Select the ARG'th different window on this frame.\n\
1645 All windows on current frame are arranged in a cyclic order.\n\
1646 This command selects the window ARG steps away in that order.\n\
1647 A negative ARG moves in the opposite order. If the optional second\n\
1648 argument ALL_FRAMES is non-nil, cycle through all frames.")
1650 Lisp_Object arg
, all_frames
;
1655 CHECK_NUMBER (arg
, 0);
1656 window
= selected_window
;
1658 for (i
= XINT (arg
); i
> 0; --i
)
1659 window
= Fnext_window (window
, Qnil
, all_frames
);
1661 window
= Fprevious_window (window
, Qnil
, all_frames
);
1663 Fselect_window (window
);
1668 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1669 "Return a list of windows on FRAME, starting with WINDOW.\n\
1670 FRAME nil or omitted means use the selected frame.\n\
1671 WINDOW nil or omitted means use the selected window.\n\
1672 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1673 MINIBUF nil or omitted means include the minibuffer window only\n\
1675 MINIBUF neither nil nor t means never include the minibuffer window.")
1676 (frame
, minibuf
, window
)
1677 Lisp_Object frame
, minibuf
, window
;
1680 window
= selected_window
;
1682 frame
= selected_frame
;
1684 if (!EQ (frame
, XWINDOW (window
)->frame
))
1685 error ("Window is on a different frame");
1687 return window_list_1 (window
, minibuf
, frame
);
1691 /* Return a list of windows in canonical ordering. Arguments are like
1692 for `next-window'. */
1695 window_list_1 (window
, minibuf
, all_frames
)
1696 Lisp_Object window
, minibuf
, all_frames
;
1698 Lisp_Object tail
, list
;
1700 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1703 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1704 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1705 list
= Fcons (XCAR (tail
), list
);
1707 return Fnreverse (list
);
1712 /* Look at all windows, performing an operation specified by TYPE
1714 If FRAMES is Qt, look at all frames;
1715 Qnil, look at just the selected frame;
1716 Qvisible, look at visible frames;
1717 a frame, just look at windows on that frame.
1718 If MINI is non-zero, perform the operation on minibuffer windows too. */
1723 GET_BUFFER_WINDOW
, /* Arg is buffer */
1724 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1725 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1726 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1728 UNSHOW_BUFFER
, /* Arg is buffer */
1733 window_loop (type
, obj
, mini
, frames
)
1734 enum window_loop type
;
1735 Lisp_Object obj
, frames
;
1738 Lisp_Object window
, windows
, best_window
, frame_arg
;
1740 struct gcpro gcpro1
;
1742 /* If we're only looping through windows on a particular frame,
1743 frame points to that frame. If we're looping through windows
1744 on all frames, frame is 0. */
1745 if (FRAMEP (frames
))
1746 f
= XFRAME (frames
);
1747 else if (NILP (frames
))
1748 f
= SELECTED_FRAME ();
1753 frame_arg
= Qlambda
;
1754 else if (XFASTINT (frames
) == 0)
1756 else if (EQ (frames
, Qvisible
))
1761 /* frame_arg is Qlambda to stick to one frame,
1762 Qvisible to consider all visible frames,
1765 /* Pick a window to start with. */
1769 window
= FRAME_SELECTED_WINDOW (f
);
1771 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1773 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1777 for (; CONSP (windows
); windows
= CDR (windows
))
1781 window
= XCAR (windows
);
1782 w
= XWINDOW (window
);
1784 /* Note that we do not pay attention here to whether the frame
1785 is visible, since Fwindow_list skips non-visible frames if
1786 that is desired, under the control of frame_arg. */
1787 if (!MINI_WINDOW_P (w
)
1788 /* For UNSHOW_BUFFER, we must always consider all windows. */
1789 || type
== UNSHOW_BUFFER
1790 || (mini
&& minibuf_level
> 0))
1793 case GET_BUFFER_WINDOW
:
1794 if (EQ (w
->buffer
, obj
)
1795 /* Don't find any minibuffer window
1796 except the one that is currently in use. */
1797 && (MINI_WINDOW_P (w
)
1798 ? EQ (window
, minibuf_window
)
1801 if (NILP (best_window
))
1802 best_window
= window
;
1803 else if (EQ (window
, selected_window
))
1804 /* For compatibility with 20.x, prefer to return
1806 best_window
= window
;
1810 case GET_LRU_WINDOW
:
1811 /* t as arg means consider only full-width windows */
1812 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1814 /* Ignore dedicated windows and minibuffers. */
1815 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1817 if (NILP (best_window
)
1818 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1819 > XFASTINT (w
->use_time
)))
1820 best_window
= window
;
1823 case DELETE_OTHER_WINDOWS
:
1824 if (!EQ (window
, obj
))
1825 Fdelete_window (window
);
1828 case DELETE_BUFFER_WINDOWS
:
1829 if (EQ (w
->buffer
, obj
))
1831 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1833 /* If this window is dedicated, and in a frame of its own,
1835 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1836 && !NILP (w
->dedicated
)
1837 && other_visible_frames (f
))
1839 /* Skip the other windows on this frame.
1840 There might be one, the minibuffer! */
1841 while (CONSP (XCDR (windows
))
1842 && EQ (XWINDOW (XCAR (windows
))->frame
,
1843 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1844 windows
= XCDR (windows
);
1846 /* Now we can safely delete the frame. */
1847 Fdelete_frame (w
->frame
, Qnil
);
1849 else if (NILP (w
->parent
))
1851 /* If we're deleting the buffer displayed in the
1852 only window on the frame, find a new buffer to
1855 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1857 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1858 Fset_window_buffer (window
, buffer
);
1859 if (EQ (window
, selected_window
))
1860 Fset_buffer (w
->buffer
);
1863 Fdelete_window (window
);
1867 case GET_LARGEST_WINDOW
:
1869 /* Ignore dedicated windows and minibuffers. */
1870 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1873 if (NILP (best_window
))
1874 best_window
= window
;
1877 struct window
*b
= XWINDOW (best_window
);
1878 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1879 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1880 best_window
= window
;
1886 if (EQ (w
->buffer
, obj
))
1889 struct frame
*f
= XFRAME (w
->frame
);
1891 /* Find another buffer to show in this window. */
1892 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1894 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1896 /* If this window is dedicated, and in a frame of its own,
1898 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1899 && !NILP (w
->dedicated
)
1900 && other_visible_frames (f
))
1902 /* Skip the other windows on this frame.
1903 There might be one, the minibuffer! */
1904 while (CONSP (XCDR (windows
))
1905 && EQ (XWINDOW (XCAR (windows
))->frame
,
1906 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1907 windows
= XCDR (windows
);
1909 /* Now we can safely delete the frame. */
1910 Fdelete_frame (w
->frame
, Qnil
);
1914 /* Otherwise show a different buffer in the window. */
1915 w
->dedicated
= Qnil
;
1916 Fset_window_buffer (window
, buffer
);
1917 if (EQ (window
, selected_window
))
1918 Fset_buffer (w
->buffer
);
1923 /* Check for a window that has a killed buffer. */
1924 case CHECK_ALL_WINDOWS
:
1925 if (! NILP (w
->buffer
)
1926 && NILP (XBUFFER (w
->buffer
)->name
))
1930 case WINDOW_LOOP_UNUSED
:
1939 /* Used for debugging. Abort if any window has a dead buffer. */
1942 check_all_windows ()
1944 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1947 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1948 "Return the window least recently selected or used for display.\n\
1949 If optional argument FRAME is `visible', search all visible frames.\n\
1950 If FRAME is 0, search all visible and iconified frames.\n\
1951 If FRAME is t, search all frames.\n\
1952 If FRAME is nil, search only the selected frame.\n\
1953 If FRAME is a frame, search only that frame.")
1957 register Lisp_Object w
;
1958 /* First try for a window that is full-width */
1959 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1960 if (!NILP (w
) && !EQ (w
, selected_window
))
1962 /* If none of them, try the rest */
1963 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1966 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1967 "Return the largest window in area.\n\
1968 If optional argument FRAME is `visible', search all visible frames.\n\
1969 If FRAME is 0, search all visible and iconified frames.\n\
1970 If FRAME is t, search all frames.\n\
1971 If FRAME is nil, search only the selected frame.\n\
1972 If FRAME is a frame, search only that frame.")
1976 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1980 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1981 "Return a window currently displaying BUFFER, or nil if none.\n\
1982 If optional argument FRAME is `visible', search all visible frames.\n\
1983 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1984 If FRAME is t, search all frames.\n\
1985 If FRAME is nil, search only the selected frame.\n\
1986 If FRAME is a frame, search only that frame.")
1988 Lisp_Object buffer
, frame
;
1990 buffer
= Fget_buffer (buffer
);
1991 if (BUFFERP (buffer
))
1992 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1997 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1999 "Make WINDOW (or the selected window) fill its frame.\n\
2000 Only the frame WINDOW is on is affected.\n\
2001 This function tries to reduce display jumps\n\
2002 by keeping the text previously visible in WINDOW\n\
2003 in the same place on the frame. Doing this depends on\n\
2004 the value of (window-start WINDOW), so if calling this function\n\
2005 in a program gives strange scrolling, make sure the window-start\n\
2006 value is reasonable when this function is called.")
2015 window
= selected_window
;
2017 CHECK_LIVE_WINDOW (window
, 0);
2018 w
= XWINDOW (window
);
2020 startpos
= marker_position (w
->start
);
2021 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2023 if (MINI_WINDOW_P (w
) && top
> 0)
2024 error ("Can't expand minibuffer to full frame");
2026 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2028 /* Try to minimize scrolling, by setting the window start to the point
2029 will cause the text at the old window start to be at the same place
2030 on the frame. But don't try to do this if the window start is
2031 outside the visible portion (as might happen when the display is
2032 not current, due to typeahead). */
2033 new_top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2035 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2036 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2038 struct position pos
;
2039 struct buffer
*obuf
= current_buffer
;
2041 Fset_buffer (w
->buffer
);
2042 /* This computation used to temporarily move point, but that can
2043 have unwanted side effects due to text properties. */
2044 pos
= *vmotion (startpos
, -top
, w
);
2046 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2047 w
->window_end_valid
= Qnil
;
2048 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2049 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2051 /* We need to do this, so that the window-scroll-functions
2053 w
->optional_new_start
= Qt
;
2055 set_buffer_internal (obuf
);
2061 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2062 1, 2, "bDelete windows on (buffer): ",
2063 "Delete all windows showing BUFFER.\n\
2064 Optional second argument FRAME controls which frames are affected.\n\
2065 If optional argument FRAME is `visible', search all visible frames.\n\
2066 If FRAME is 0, search all visible and iconified frames.\n\
2067 If FRAME is nil, search all frames.\n\
2068 If FRAME is t, search only the selected frame.\n\
2069 If FRAME is a frame, search only that frame.")
2071 Lisp_Object buffer
, frame
;
2073 /* FRAME uses t and nil to mean the opposite of what window_loop
2077 else if (EQ (frame
, Qt
))
2082 buffer
= Fget_buffer (buffer
);
2083 CHECK_BUFFER (buffer
, 0);
2084 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2090 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2091 Sreplace_buffer_in_windows
,
2092 1, 1, "bReplace buffer in windows: ",
2093 "Replace BUFFER with some other buffer in all windows showing it.")
2099 buffer
= Fget_buffer (buffer
);
2100 CHECK_BUFFER (buffer
, 0);
2101 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2106 /* Replace BUFFER with some other buffer in all windows
2107 of all frames, even those on other keyboards. */
2110 replace_buffer_in_all_windows (buffer
)
2114 Lisp_Object tail
, frame
;
2116 /* A single call to window_loop won't do the job
2117 because it only considers frames on the current keyboard.
2118 So loop manually over frames, and handle each one. */
2119 FOR_EACH_FRAME (tail
, frame
)
2120 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2122 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2126 /* Set the height of WINDOW and all its inferiors. */
2128 /* The smallest acceptable dimensions for a window. Anything smaller
2129 might crash Emacs. */
2131 #define MIN_SAFE_WINDOW_WIDTH (2)
2132 #define MIN_SAFE_WINDOW_HEIGHT (2)
2134 /* Make sure that window_min_height and window_min_width are
2135 not too small; if they are, set them to safe minima. */
2138 check_min_window_sizes ()
2140 /* Smaller values might permit a crash. */
2141 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2142 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2143 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2144 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2147 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2148 minimum allowable size. */
2151 check_frame_size (frame
, rows
, cols
)
2155 /* For height, we have to see:
2156 whether the frame has a minibuffer,
2157 whether it wants a mode line, and
2158 whether it has a menu bar. */
2160 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2161 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2162 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2164 if (FRAME_TOP_MARGIN (frame
) > 0)
2165 min_height
+= FRAME_TOP_MARGIN (frame
);
2167 if (*rows
< min_height
)
2169 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2170 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2174 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2175 check if W's width can be changed, otherwise check W's height.
2176 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2177 siblings, too. If none of the siblings is resizable, WINDOW isn't
2181 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2183 int width_p
, check_siblings_p
;
2188 if (!NILP (w
->hchild
))
2190 c
= XWINDOW (w
->hchild
);
2194 /* A horiz. combination is fixed-width if all of if its
2196 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2197 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2198 fixed_p
= c
== NULL
;
2202 /* A horiz. combination is fixed-height if one of if its
2204 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2205 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2206 fixed_p
= c
!= NULL
;
2209 else if (!NILP (w
->vchild
))
2211 c
= XWINDOW (w
->vchild
);
2215 /* A vert. combination is fixed-width if one of if its
2217 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2218 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2219 fixed_p
= c
!= NULL
;
2223 /* A vert. combination is fixed-height if all of if its
2225 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2226 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2227 fixed_p
= c
== NULL
;
2230 else if (BUFFERP (w
->buffer
))
2232 if (w
->height_fixed_p
&& !width_p
)
2236 struct buffer
*old
= current_buffer
;
2239 current_buffer
= XBUFFER (w
->buffer
);
2240 val
= find_symbol_value (Qwindow_size_fixed
);
2241 current_buffer
= old
;
2244 if (!EQ (val
, Qunbound
))
2246 fixed_p
= !NILP (val
);
2249 && ((EQ (val
, Qheight
) && width_p
)
2250 || (EQ (val
, Qwidth
) && !width_p
)))
2255 /* Can't tell if this one is resizable without looking at
2256 siblings. If all siblings are fixed-size this one is too. */
2257 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2261 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2262 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2266 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2267 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2281 /* Return the minimum size of window W, not taking fixed-width windows
2282 into account. WIDTH_P non-zero means return the minimum width,
2283 otherwise return the minimum height. If W is a combination window,
2284 compute the minimum size from the minimum sizes of W's children. */
2287 window_min_size_1 (w
, width_p
)
2294 if (!NILP (w
->hchild
))
2296 c
= XWINDOW (w
->hchild
);
2301 /* The min width of a horizontal combination is
2302 the sum of the min widths of its children. */
2305 size
+= window_min_size_1 (c
, width_p
);
2306 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2311 /* The min height a horizontal combination equals
2312 the maximum of all min height of its children. */
2315 int min_size
= window_min_size_1 (c
, width_p
);
2316 size
= max (min_size
, size
);
2317 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2321 else if (!NILP (w
->vchild
))
2323 c
= XWINDOW (w
->vchild
);
2328 /* The min width of a vertical combination is
2329 the maximum of the min widths of its children. */
2332 int min_size
= window_min_size_1 (c
, width_p
);
2333 size
= max (min_size
, size
);
2334 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2339 /* The min height of a vertical combination equals
2340 the sum of the min height of its children. */
2343 size
+= window_min_size_1 (c
, width_p
);
2344 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2351 size
= window_min_width
;
2354 if (MINI_WINDOW_P (w
)
2355 || (!WINDOW_WANTS_MODELINE_P (w
)
2356 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2359 size
= window_min_height
;
2367 /* Return the minimum size of window W, taking fixed-size windows into
2368 account. WIDTH_P non-zero means return the minimum width,
2369 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2370 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2371 unless FIXED is null. */
2374 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2376 int width_p
, ignore_fixed_p
, *fixed
;
2383 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2389 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2391 size
= window_min_size_1 (w
, width_p
);
2397 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2398 WINDOW's width. Resize WINDOW's children, if any, so that they
2399 keep their proportionate size relative to WINDOW. Propagate
2400 WINDOW's top or left edge position to children. Delete windows
2401 that become too small unless NODELETE_P is non-zero. */
2404 size_window (window
, size
, width_p
, nodelete_p
)
2406 int size
, width_p
, nodelete_p
;
2408 struct window
*w
= XWINDOW (window
);
2410 Lisp_Object child
, *forward
, *sideward
;
2411 int old_size
, min_size
;
2413 check_min_window_sizes ();
2414 size
= max (0, size
);
2416 /* If the window has been "too small" at one point,
2417 don't delete it for being "too small" in the future.
2418 Preserve it as long as that is at all possible. */
2421 old_size
= XINT (w
->width
);
2422 min_size
= window_min_width
;
2426 old_size
= XINT (w
->height
);
2427 min_size
= window_min_height
;
2430 if (old_size
< min_size
)
2431 w
->too_small_ok
= Qt
;
2433 /* Maybe delete WINDOW if it's too small. */
2434 if (!nodelete_p
&& !NILP (w
->parent
))
2436 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2437 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2439 min_size
= width_p
? window_min_width
: window_min_height
;
2441 if (size
< min_size
)
2443 delete_window (window
);
2448 /* Set redisplay hints. */
2449 w
->last_modified
= make_number (0);
2450 w
->last_overlay_modified
= make_number (0);
2451 windows_or_buffers_changed
++;
2452 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2456 sideward
= &w
->vchild
;
2457 forward
= &w
->hchild
;
2458 w
->width
= make_number (size
);
2462 sideward
= &w
->hchild
;
2463 forward
= &w
->vchild
;
2464 w
->height
= make_number (size
);
2465 w
->orig_height
= Qnil
;
2468 if (!NILP (*sideward
))
2470 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2472 c
= XWINDOW (child
);
2477 size_window (child
, size
, width_p
, nodelete_p
);
2480 else if (!NILP (*forward
))
2482 int fixed_size
, each
, extra
, n
;
2483 int resize_fixed_p
, nfixed
;
2484 int last_pos
, first_pos
, nchildren
, total
;
2486 /* Determine the fixed-size portion of the this window, and the
2487 number of child windows. */
2488 fixed_size
= nchildren
= nfixed
= total
= 0;
2489 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2493 c
= XWINDOW (child
);
2494 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2495 total
+= child_size
;
2497 if (window_fixed_size_p (c
, width_p
, 0))
2499 fixed_size
+= child_size
;
2504 /* If the new size is smaller than fixed_size, or if there
2505 aren't any resizable windows, allow resizing fixed-size
2507 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2509 /* Compute how many lines/columns to add to each child. The
2510 value of extra takes care of rounding errors. */
2511 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2512 each
= (size
- total
) / n
;
2513 extra
= (size
- total
) - n
* each
;
2515 /* Compute new children heights and edge positions. */
2516 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2517 last_pos
= first_pos
;
2518 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2520 int new_size
, old_size
;
2522 c
= XWINDOW (child
);
2523 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2524 new_size
= old_size
;
2526 /* The top or left edge position of this child equals the
2527 bottom or right edge of its predecessor. */
2529 c
->left
= make_number (last_pos
);
2531 c
->top
= make_number (last_pos
);
2533 /* If this child can be resized, do it. */
2534 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2536 new_size
= old_size
+ each
+ extra
;
2540 /* Set new height. Note that size_window also propagates
2541 edge positions to children, so it's not a no-op if we
2542 didn't change the child's size. */
2543 size_window (child
, new_size
, width_p
, 1);
2545 /* Remember the bottom/right edge position of this child; it
2546 will be used to set the top/left edge of the next child. */
2547 last_pos
+= new_size
;
2550 /* We should have covered the parent exactly with child windows. */
2551 xassert (size
== last_pos
- first_pos
);
2553 /* Now delete any children that became too small. */
2555 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2558 c
= XWINDOW (child
);
2559 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2560 size_window (child
, child_size
, width_p
, 0);
2565 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2566 WINDOW's children. NODELETE non-zero means don't delete windows
2567 that become too small in the process. (The caller should check
2568 later and do so if appropriate.) */
2571 set_window_height (window
, height
, nodelete
)
2576 size_window (window
, height
, 0, nodelete
);
2580 /* Set WINDOW's width to WIDTH, and recursively change the width of
2581 WINDOW's children. NODELETE non-zero means don't delete windows
2582 that become too small in the process. (The caller should check
2583 later and do so if appropriate.) */
2586 set_window_width (window
, width
, nodelete
)
2591 size_window (window
, width
, 1, nodelete
);
2595 int window_select_count
;
2598 Fset_window_buffer_unwind (obuf
)
2606 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2607 means it's allowed to run hooks. See make_frame for a case where
2608 it's not allowed. */
2611 set_window_buffer (window
, buffer
, run_hooks_p
)
2612 Lisp_Object window
, buffer
;
2615 struct window
*w
= XWINDOW (window
);
2616 struct buffer
*b
= XBUFFER (buffer
);
2617 int count
= specpdl_ptr
- specpdl
;
2621 if (EQ (window
, selected_window
))
2622 b
->last_selected_window
= window
;
2624 /* Update time stamps of buffer display. */
2625 if (INTEGERP (b
->display_count
))
2626 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2627 b
->display_time
= Fcurrent_time ();
2629 XSETFASTINT (w
->window_end_pos
, 0);
2630 XSETFASTINT (w
->window_end_vpos
, 0);
2631 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2632 w
->window_end_valid
= Qnil
;
2633 w
->hscroll
= w
->min_hscroll
= make_number (0);
2634 w
->vscroll
= make_number (0);
2635 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2636 set_marker_restricted (w
->start
,
2637 make_number (b
->last_window_start
),
2639 w
->start_at_line_beg
= Qnil
;
2640 w
->force_start
= Qnil
;
2641 XSETFASTINT (w
->last_modified
, 0);
2642 XSETFASTINT (w
->last_overlay_modified
, 0);
2643 windows_or_buffers_changed
++;
2645 /* We must select BUFFER for running the window-scroll-functions.
2646 If WINDOW is selected, switch permanently.
2647 Otherwise, switch but go back to the ambient buffer afterward. */
2648 if (EQ (window
, selected_window
))
2649 Fset_buffer (buffer
);
2650 /* We can't check ! NILP (Vwindow_scroll_functions) here
2651 because that might itself be a local variable. */
2652 else if (window_initialized
)
2654 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2655 Fset_buffer (buffer
);
2658 /* Set left and right marginal area width from buffer. */
2659 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2663 if (! NILP (Vwindow_scroll_functions
))
2664 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2665 Fmarker_position (w
->start
));
2667 if (! NILP (Vwindow_configuration_change_hook
)
2668 && ! NILP (Vrun_hooks
))
2669 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2672 unbind_to (count
, Qnil
);
2676 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2677 "Make WINDOW display BUFFER as its contents.\n\
2678 BUFFER can be a buffer or buffer name.")
2680 register Lisp_Object window
, buffer
;
2682 register Lisp_Object tem
;
2683 register struct window
*w
= decode_window (window
);
2685 XSETWINDOW (window
, w
);
2686 buffer
= Fget_buffer (buffer
);
2687 CHECK_BUFFER (buffer
, 1);
2689 if (NILP (XBUFFER (buffer
)->name
))
2690 error ("Attempt to display deleted buffer");
2694 error ("Window is deleted");
2695 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2696 is first being set up. */
2698 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2699 error ("Window is dedicated to `%s'",
2700 XSTRING (XBUFFER (tem
)->name
)->data
);
2705 set_window_buffer (window
, buffer
, 1);
2709 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2710 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2711 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2712 Note that the main editor command loop\n\
2713 selects the buffer of the selected window before each command.")
2715 register Lisp_Object window
;
2717 return select_window_1 (window
, 1);
2720 /* Note that selected_window can be nil
2721 when this is called from Fset_window_configuration. */
2724 select_window_1 (window
, recordflag
)
2725 register Lisp_Object window
;
2728 register struct window
*w
;
2729 register struct window
*ow
;
2732 CHECK_LIVE_WINDOW (window
, 0);
2734 w
= XWINDOW (window
);
2736 if (NILP (w
->buffer
))
2737 error ("Trying to select deleted window or non-leaf window");
2739 XSETFASTINT (w
->use_time
, ++window_select_count
);
2740 if (EQ (window
, selected_window
))
2743 if (!NILP (selected_window
))
2745 ow
= XWINDOW (selected_window
);
2746 if (! NILP (ow
->buffer
))
2747 set_marker_both (ow
->pointm
, ow
->buffer
,
2748 BUF_PT (XBUFFER (ow
->buffer
)),
2749 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2752 selected_window
= window
;
2753 sf
= SELECTED_FRAME ();
2754 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2756 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2757 /* Use this rather than Fhandle_switch_frame
2758 so that FRAME_FOCUS_FRAME is moved appropriately as we
2759 move around in the state where a minibuffer in a separate
2761 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2764 sf
->selected_window
= window
;
2767 record_buffer (w
->buffer
);
2768 Fset_buffer (w
->buffer
);
2770 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2772 /* Go to the point recorded in the window.
2773 This is important when the buffer is in more
2774 than one window. It also matters when
2775 redisplay_window has altered point after scrolling,
2776 because it makes the change only in the window. */
2778 register int new_point
= marker_position (w
->pointm
);
2779 if (new_point
< BEGV
)
2781 else if (new_point
> ZV
)
2787 windows_or_buffers_changed
++;
2791 /* Deiconify the frame containing the window WINDOW,
2792 unless it is the selected frame;
2795 The reason for the exception for the selected frame
2796 is that it seems better not to change the selected frames visibility
2797 merely because of displaying a different buffer in it.
2798 The deiconification is useful when a buffer gets shown in
2799 another frame that you were not using lately. */
2802 display_buffer_1 (window
)
2805 Lisp_Object frame
= XWINDOW (window
)->frame
;
2806 FRAME_PTR f
= XFRAME (frame
);
2808 FRAME_SAMPLE_VISIBILITY (f
);
2810 if (!EQ (frame
, selected_frame
))
2812 if (FRAME_ICONIFIED_P (f
))
2813 Fmake_frame_visible (frame
);
2814 else if (FRAME_VISIBLE_P (f
))
2815 Fraise_frame (frame
);
2821 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2822 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2823 The value is actually t if the frame should be called with default frame\n\
2824 parameters, and a list of frame parameters if they were specified.\n\
2825 See `special-display-buffer-names', and `special-display-regexps'.")
2827 Lisp_Object buffer_name
;
2831 CHECK_STRING (buffer_name
, 1);
2833 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2837 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2841 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2843 Lisp_Object car
= XCAR (tem
);
2845 && fast_string_match (car
, buffer_name
) >= 0)
2847 else if (CONSP (car
)
2848 && STRINGP (XCAR (car
))
2849 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2855 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2856 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2857 See `same-window-buffer-names' and `same-window-regexps'.")
2859 Lisp_Object buffer_name
;
2863 CHECK_STRING (buffer_name
, 1);
2865 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2869 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2873 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2875 Lisp_Object car
= XCAR (tem
);
2877 && fast_string_match (car
, buffer_name
) >= 0)
2879 else if (CONSP (car
)
2880 && STRINGP (XCAR (car
))
2881 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2887 /* Use B so the default is (other-buffer). */
2888 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2889 "BDisplay buffer: \nP",
2890 "Make BUFFER appear in some window but don't select it.\n\
2891 BUFFER can be a buffer or a buffer name.\n\
2892 If BUFFER is shown already in some window, just use that one,\n\
2893 unless the window is the selected window and the optional second\n\
2894 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2895 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2896 Returns the window displaying BUFFER.\n\
2897 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2898 displaying BUFFER, then simply raise that frame.\n\
2900 The variables `special-display-buffer-names', `special-display-regexps',\n\
2901 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2902 buffer names are handled.\n\
2904 If optional argument FRAME is `visible', search all visible frames.\n\
2905 If FRAME is 0, search all visible and iconified frames.\n\
2906 If FRAME is t, search all frames.\n\
2907 If FRAME is a frame, search only that frame.\n\
2908 If FRAME is nil, search only the selected frame\n\
2909 (actually the last nonminibuffer frame),\n\
2910 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2911 which means search visible and iconified frames.\n\
2913 If `even-window-heights' is non-nil, window heights will be evened out\n\
2914 if displaying the buffer causes two vertically adjacent windows to be\n\
2916 (buffer
, not_this_window
, frame
)
2917 register Lisp_Object buffer
, not_this_window
, frame
;
2919 register Lisp_Object window
, tem
, swp
;
2923 buffer
= Fget_buffer (buffer
);
2924 CHECK_BUFFER (buffer
, 0);
2926 if (!NILP (Vdisplay_buffer_function
))
2927 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2929 if (NILP (not_this_window
)
2930 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2931 return display_buffer_1 (selected_window
);
2933 /* See if the user has specified this buffer should appear
2934 in the selected window. */
2935 if (NILP (not_this_window
))
2937 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2938 if (!NILP (swp
) && !no_switch_window (selected_window
))
2940 Fswitch_to_buffer (buffer
, Qnil
);
2941 return display_buffer_1 (selected_window
);
2945 /* If the user wants pop-up-frames or display-reuse-frames, then
2946 look for a window showing BUFFER on any visible or iconified frame.
2947 Otherwise search only the current frame. */
2950 else if (pop_up_frames
2951 || display_buffer_reuse_frames
2952 || last_nonminibuf_frame
== 0)
2953 XSETFASTINT (tem
, 0);
2955 XSETFRAME (tem
, last_nonminibuf_frame
);
2957 window
= Fget_buffer_window (buffer
, tem
);
2959 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2960 return display_buffer_1 (window
);
2962 /* Certain buffer names get special handling. */
2963 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2965 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2967 return call1 (Vspecial_display_function
, buffer
);
2969 return call2 (Vspecial_display_function
, buffer
, tem
);
2972 /* If there are no frames open that have more than a minibuffer,
2973 we need to create a new frame. */
2974 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2976 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2977 Fset_window_buffer (window
, buffer
);
2978 return display_buffer_1 (window
);
2981 f
= SELECTED_FRAME ();
2983 || FRAME_MINIBUF_ONLY_P (f
)
2984 /* If the current frame is a special display frame,
2985 don't try to reuse its windows. */
2986 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2991 if (FRAME_MINIBUF_ONLY_P (f
))
2992 XSETFRAME (frames
, last_nonminibuf_frame
);
2993 /* Don't try to create a window if would get an error */
2994 if (split_height_threshold
< window_min_height
<< 1)
2995 split_height_threshold
= window_min_height
<< 1;
2997 /* Note that both Fget_largest_window and Fget_lru_window
2998 ignore minibuffers and dedicated windows.
2999 This means they can return nil. */
3001 /* If the frame we would try to split cannot be split,
3002 try other frames. */
3003 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3005 /* Try visible frames first. */
3006 window
= Fget_largest_window (Qvisible
);
3007 /* If that didn't work, try iconified frames. */
3009 window
= Fget_largest_window (make_number (0));
3011 window
= Fget_largest_window (Qt
);
3014 window
= Fget_largest_window (frames
);
3016 /* If we got a tall enough full-width window that can be split,
3019 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3020 && window_height (window
) >= split_height_threshold
3021 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3022 window
= Fsplit_window (window
, Qnil
, Qnil
);
3025 Lisp_Object upper
, lower
, other
;
3027 window
= Fget_lru_window (frames
);
3028 /* If the LRU window is selected, and big enough,
3029 and can be split, split it. */
3031 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3032 && (EQ (window
, selected_window
)
3033 || EQ (XWINDOW (window
)->parent
, Qnil
))
3034 && window_height (window
) >= window_min_height
<< 1)
3035 window
= Fsplit_window (window
, Qnil
, Qnil
);
3036 /* If Fget_lru_window returned nil, try other approaches. */
3038 /* Try visible frames first. */
3040 window
= Fget_buffer_window (buffer
, Qvisible
);
3042 window
= Fget_largest_window (Qvisible
);
3043 /* If that didn't work, try iconified frames. */
3045 window
= Fget_buffer_window (buffer
, make_number (0));
3047 window
= Fget_largest_window (make_number (0));
3048 /* Try invisible frames. */
3050 window
= Fget_buffer_window (buffer
, Qt
);
3052 window
= Fget_largest_window (Qt
);
3053 /* As a last resort, make a new frame. */
3055 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3056 /* If window appears above or below another,
3057 even out their heights. */
3058 other
= upper
= lower
= Qnil
;
3059 if (!NILP (XWINDOW (window
)->prev
))
3060 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3061 if (!NILP (XWINDOW (window
)->next
))
3062 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3064 && !NILP (Veven_window_heights
)
3065 /* Check that OTHER and WINDOW are vertically arrayed. */
3066 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3067 && (XFASTINT (XWINDOW (other
)->height
)
3068 > XFASTINT (XWINDOW (window
)->height
)))
3070 int total
= (XFASTINT (XWINDOW (other
)->height
)
3071 + XFASTINT (XWINDOW (window
)->height
));
3072 enlarge_window (upper
,
3073 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3079 window
= Fget_lru_window (Qnil
);
3081 Fset_window_buffer (window
, buffer
);
3082 return display_buffer_1 (window
);
3086 temp_output_buffer_show (buf
)
3087 register Lisp_Object buf
;
3089 register struct buffer
*old
= current_buffer
;
3090 register Lisp_Object window
;
3091 register struct window
*w
;
3093 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3096 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3100 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3101 set_buffer_internal (old
);
3103 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3104 call1 (Vtemp_buffer_show_function
, buf
);
3107 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3109 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3110 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3111 Vminibuf_scroll_window
= window
;
3112 w
= XWINDOW (window
);
3113 XSETFASTINT (w
->hscroll
, 0);
3114 XSETFASTINT (w
->min_hscroll
, 0);
3115 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3116 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3118 /* Run temp-buffer-show-hook, with the chosen window selected
3119 and it sbuffer current. */
3120 if (!NILP (Vrun_hooks
))
3123 tem
= Fboundp (Qtemp_buffer_show_hook
);
3126 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3129 int count
= specpdl_ptr
- specpdl
;
3130 Lisp_Object prev_window
;
3131 prev_window
= selected_window
;
3133 /* Select the window that was chosen, for running the hook. */
3134 record_unwind_protect (Fselect_window
, prev_window
);
3135 select_window_1 (window
, 0);
3136 Fset_buffer (w
->buffer
);
3137 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3138 select_window_1 (prev_window
, 0);
3139 unbind_to (count
, Qnil
);
3147 make_dummy_parent (window
)
3151 register struct window
*o
, *p
;
3154 o
= XWINDOW (window
);
3155 p
= allocate_window ();
3156 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3157 ((struct Lisp_Vector
*) p
)->contents
[i
]
3158 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3159 XSETWINDOW (new, p
);
3161 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3163 /* Put new into window structure in place of window */
3164 replace_window (window
, new);
3177 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3178 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3179 WINDOW defaults to selected one and SIZE to half its size.\n\
3180 If optional third arg HORFLAG is non-nil, split side by side\n\
3181 and put SIZE columns in the first of the pair. In that case,\n\
3182 SIZE includes that window's scroll bar, or the divider column to its right.")
3183 (window
, size
, horflag
)
3184 Lisp_Object window
, size
, horflag
;
3186 register Lisp_Object
new;
3187 register struct window
*o
, *p
;
3189 register int size_int
;
3192 window
= selected_window
;
3194 CHECK_LIVE_WINDOW (window
, 0);
3196 o
= XWINDOW (window
);
3197 fo
= XFRAME (WINDOW_FRAME (o
));
3201 if (!NILP (horflag
))
3202 /* Calculate the size of the left-hand window, by dividing
3203 the usable space in columns by two.
3204 We round up, since the left-hand window may include
3205 a dividing line, while the right-hand may not. */
3206 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3208 size_int
= XFASTINT (o
->height
) >> 1;
3212 CHECK_NUMBER (size
, 1);
3213 size_int
= XINT (size
);
3216 if (MINI_WINDOW_P (o
))
3217 error ("Attempt to split minibuffer window");
3218 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3219 error ("Attempt to split fixed-size window");
3221 check_min_window_sizes ();
3225 if (size_int
< window_min_height
)
3226 error ("Window height %d too small (after splitting)", size_int
);
3227 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3228 error ("Window height %d too small (after splitting)",
3229 XFASTINT (o
->height
) - size_int
);
3230 if (NILP (o
->parent
)
3231 || NILP (XWINDOW (o
->parent
)->vchild
))
3233 make_dummy_parent (window
);
3235 XWINDOW (new)->vchild
= window
;
3240 if (size_int
< window_min_width
)
3241 error ("Window width %d too small (after splitting)", size_int
);
3243 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3244 error ("Window width %d too small (after splitting)",
3245 XFASTINT (o
->width
) - size_int
);
3246 if (NILP (o
->parent
)
3247 || NILP (XWINDOW (o
->parent
)->hchild
))
3249 make_dummy_parent (window
);
3251 XWINDOW (new)->hchild
= window
;
3255 /* Now we know that window's parent is a vertical combination
3256 if we are dividing vertically, or a horizontal combination
3257 if we are making side-by-side windows */
3259 windows_or_buffers_changed
++;
3260 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3261 new = make_window ();
3264 p
->frame
= o
->frame
;
3266 if (!NILP (p
->next
))
3267 XWINDOW (p
->next
)->prev
= new;
3270 p
->parent
= o
->parent
;
3272 p
->window_end_valid
= Qnil
;
3273 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3275 /* Apportion the available frame space among the two new windows */
3277 if (!NILP (horflag
))
3279 p
->height
= o
->height
;
3281 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3282 XSETFASTINT (o
->width
, size_int
);
3283 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3288 p
->width
= o
->width
;
3289 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3290 XSETFASTINT (o
->height
, size_int
);
3291 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3294 /* Adjust glyph matrices. */
3296 Fset_window_buffer (new, o
->buffer
);
3300 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3301 "Make current window ARG lines bigger.\n\
3302 From program, optional second arg non-nil means grow sideways ARG columns.\n\
3303 Interactively, if an argument is not given, make the window one line bigger.")
3305 register Lisp_Object arg
, side
;
3307 CHECK_NUMBER (arg
, 0);
3308 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3310 if (! NILP (Vwindow_configuration_change_hook
))
3311 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3316 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3317 "Make current window ARG lines smaller.\n\
3318 From program, optional second arg non-nil means shrink sideways arg columns.\n\
3319 Interactively, if an argument is not given, make the window one line smaller.")
3321 register Lisp_Object arg
, side
;
3323 CHECK_NUMBER (arg
, 0);
3324 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3326 if (! NILP (Vwindow_configuration_change_hook
))
3327 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3333 window_height (window
)
3336 register struct window
*p
= XWINDOW (window
);
3337 return XFASTINT (p
->height
);
3341 window_width (window
)
3344 register struct window
*p
= XWINDOW (window
);
3345 return XFASTINT (p
->width
);
3350 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3352 #define CURSIZE(w) \
3353 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3356 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3357 increase its width. Siblings of the selected window are resized to
3358 fullfil the size request. If they become too small in the process,
3359 they will be deleted. */
3362 enlarge_window (window
, delta
, widthflag
)
3364 int delta
, widthflag
;
3366 Lisp_Object parent
, next
, prev
;
3370 int (*sizefun
) P_ ((Lisp_Object
))
3371 = widthflag
? window_width
: window_height
;
3372 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3373 = (widthflag
? set_window_width
: set_window_height
);
3375 /* Check values of window_min_width and window_min_height for
3377 check_min_window_sizes ();
3379 /* Give up if this window cannot be resized. */
3380 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3381 error ("Window is not resizable");
3383 /* Find the parent of the selected window. */
3386 p
= XWINDOW (window
);
3392 error ("No other window to side of this one");
3397 ? !NILP (XWINDOW (parent
)->hchild
)
3398 : !NILP (XWINDOW (parent
)->vchild
))
3404 sizep
= &CURSIZE (window
);
3407 register int maxdelta
;
3409 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3410 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3411 - window_min_size (XWINDOW (p
->next
),
3413 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3414 - window_min_size (XWINDOW (p
->prev
),
3416 /* This is a frame with only one window, a minibuffer-only
3417 or a minibufferless frame. */
3420 if (delta
> maxdelta
)
3421 /* This case traps trying to make the minibuffer
3422 the full frame, or make the only window aside from the
3423 minibuffer the full frame. */
3427 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3429 delete_window (window
);
3436 /* Find the total we can get from other siblings. */
3438 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3439 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3441 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3442 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3445 /* If we can get it all from them, do so. */
3446 if (delta
<= maximum
)
3448 Lisp_Object first_unaffected
;
3449 Lisp_Object first_affected
;
3454 first_affected
= window
;
3455 /* Look at one sibling at a time,
3456 moving away from this window in both directions alternately,
3457 and take as much as we can get without deleting that sibling. */
3458 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3462 int this_one
= ((*sizefun
) (next
)
3463 - window_min_size (XWINDOW (next
),
3464 widthflag
, 0, &fixed_p
));
3467 if (this_one
> delta
)
3470 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3471 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3476 next
= XWINDOW (next
)->next
;
3484 int this_one
= ((*sizefun
) (prev
)
3485 - window_min_size (XWINDOW (prev
),
3486 widthflag
, 0, &fixed_p
));
3489 if (this_one
> delta
)
3492 first_affected
= prev
;
3494 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3495 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3500 prev
= XWINDOW (prev
)->prev
;
3504 xassert (delta
== 0);
3506 /* Now recalculate the edge positions of all the windows affected,
3507 based on the new sizes. */
3508 first_unaffected
= next
;
3509 prev
= first_affected
;
3510 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3511 prev
= next
, next
= XWINDOW (next
)->next
)
3513 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3514 /* This does not change size of NEXT,
3515 but it propagates the new top edge to its children */
3516 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3521 register int delta1
;
3522 register int opht
= (*sizefun
) (parent
);
3524 /* If trying to grow this window to or beyond size of the parent,
3525 make delta1 so big that, on shrinking back down,
3526 all the siblings end up with less than one line and are deleted. */
3527 if (opht
<= XINT (*sizep
) + delta
)
3528 delta1
= opht
* opht
* 2;
3531 /* Otherwise, make delta1 just right so that if we add
3532 delta1 lines to this window and to the parent, and then
3533 shrink the parent back to its original size, the new
3534 proportional size of this window will increase by delta.
3536 The function size_window will compute the new height h'
3537 of the window from delta1 as:
3540 x = delta1 - delta1/n * n for the 1st resizable child
3543 where n is the number of children that can be resized.
3544 We can ignore x by choosing a delta1 that is a multiple of
3545 n. We want the height of this window to come out as
3555 The number of children n rquals the number of resizable
3556 children of this window + 1 because we know window itself
3557 is resizable (otherwise we would have signalled an error. */
3559 struct window
*w
= XWINDOW (window
);
3563 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3564 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3566 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3567 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3573 /* Add delta1 lines or columns to this window, and to the parent,
3574 keeping things consistent while not affecting siblings. */
3575 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3576 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3578 /* Squeeze out delta1 lines or columns from our parent,
3579 shriking this window and siblings proportionately.
3580 This brings parent back to correct size.
3581 Delta1 was calculated so this makes this window the desired size,
3582 taking it all out of the siblings. */
3583 (*setsizefun
) (parent
, opht
, 0);
3586 XSETFASTINT (p
->last_modified
, 0);
3587 XSETFASTINT (p
->last_overlay_modified
, 0);
3589 /* Adjust glyph matrices. */
3590 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3598 /***********************************************************************
3599 Resizing Mini-Windows
3600 ***********************************************************************/
3602 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3604 enum save_restore_action
3611 static int save_restore_orig_size
P_ ((struct window
*,
3612 enum save_restore_action
));
3614 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3615 from lowest windows first. */
3618 shrink_window_lowest_first (w
, height
)
3626 xassert (!MINI_WINDOW_P (w
));
3628 /* Set redisplay hints. */
3629 XSETFASTINT (w
->last_modified
, 0);
3630 XSETFASTINT (w
->last_overlay_modified
, 0);
3631 windows_or_buffers_changed
++;
3632 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3634 old_height
= XFASTINT (w
->height
);
3635 XSETFASTINT (w
->height
, height
);
3637 if (!NILP (w
->hchild
))
3639 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3641 c
= XWINDOW (child
);
3643 shrink_window_lowest_first (c
, height
);
3646 else if (!NILP (w
->vchild
))
3648 Lisp_Object last_child
;
3649 int delta
= old_height
- height
;
3654 /* Find the last child. We are taking space from lowest windows
3655 first, so we iterate over children from the last child
3657 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3660 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3661 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3665 c
= XWINDOW (child
);
3666 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3668 if (this_one
> delta
)
3671 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3675 /* Compute new positions. */
3676 last_top
= XINT (w
->top
);
3677 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3679 c
= XWINDOW (child
);
3680 c
->top
= make_number (last_top
);
3681 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3682 last_top
+= XFASTINT (c
->height
);
3688 /* Save, restore, or check positions and sizes in the window tree
3689 rooted at W. ACTION says what to do.
3691 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3692 members are valid for all windows in the window tree. Value is
3693 non-zero if they are valid.
3695 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3696 orig_top and orig_height for all windows in the tree.
3698 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3699 values stored in orig_top and orig_height for all windows. */
3702 save_restore_orig_size (w
, action
)
3704 enum save_restore_action action
;
3710 if (!NILP (w
->hchild
))
3712 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3715 else if (!NILP (w
->vchild
))
3717 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3723 case CHECK_ORIG_SIZES
:
3724 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3728 case SAVE_ORIG_SIZES
:
3729 w
->orig_top
= w
->top
;
3730 w
->orig_height
= w
->height
;
3731 XSETFASTINT (w
->last_modified
, 0);
3732 XSETFASTINT (w
->last_overlay_modified
, 0);
3735 case RESTORE_ORIG_SIZES
:
3736 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3737 w
->top
= w
->orig_top
;
3738 w
->height
= w
->orig_height
;
3739 w
->orig_height
= w
->orig_top
= Qnil
;
3740 XSETFASTINT (w
->last_modified
, 0);
3741 XSETFASTINT (w
->last_overlay_modified
, 0);
3748 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3755 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3756 without deleting other windows. */
3759 grow_mini_window (w
, delta
)
3763 struct frame
*f
= XFRAME (w
->frame
);
3764 struct window
*root
;
3766 xassert (MINI_WINDOW_P (w
));
3767 xassert (delta
>= 0);
3769 /* Check values of window_min_width and window_min_height for
3771 check_min_window_sizes ();
3773 /* Compute how much we can enlarge the mini-window without deleting
3775 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3778 int min_height
= window_min_size (root
, 0, 0, 0);
3779 if (XFASTINT (root
->height
) - delta
< min_height
)
3780 delta
= XFASTINT (root
->height
) - min_height
;
3785 /* Save original window sizes and positions, if not already done. */
3786 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3787 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3789 /* Shrink other windows. */
3790 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3792 /* Grow the mini-window. */
3793 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3794 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3795 XSETFASTINT (w
->last_modified
, 0);
3796 XSETFASTINT (w
->last_overlay_modified
, 0);
3803 /* Shrink mini-window W. If there is recorded info about window sizes
3804 before a call to grow_mini_window, restore recorded window sizes.
3805 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3809 shrink_mini_window (w
)
3812 struct frame
*f
= XFRAME (w
->frame
);
3813 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3815 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3817 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3819 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3820 windows_or_buffers_changed
= 1;
3822 else if (XFASTINT (w
->height
) > 1)
3824 /* Distribute the additional lines of the mini-window
3825 among the other windows. */
3827 XSETWINDOW (window
, w
);
3828 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3834 /* Mark window cursors off for all windows in the window tree rooted
3835 at W by setting their phys_cursor_on_p flag to zero. Called from
3836 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3837 the frame are cleared. */
3840 mark_window_cursors_off (w
)
3845 if (!NILP (w
->hchild
))
3846 mark_window_cursors_off (XWINDOW (w
->hchild
));
3847 else if (!NILP (w
->vchild
))
3848 mark_window_cursors_off (XWINDOW (w
->vchild
));
3850 w
->phys_cursor_on_p
= 0;
3852 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3857 /* Return number of lines of text (not counting mode line) in W. */
3860 window_internal_height (w
)
3863 int ht
= XFASTINT (w
->height
);
3865 if (MINI_WINDOW_P (w
))
3868 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3869 || !NILP (w
->next
) || !NILP (w
->prev
)
3870 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3877 /* Return the number of columns in W.
3878 Don't count columns occupied by scroll bars or the vertical bar
3879 separating W from the sibling to its right. */
3882 window_internal_width (w
)
3885 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3886 int width
= XINT (w
->width
);
3888 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3889 /* Scroll bars occupy a few columns. */
3890 width
-= FRAME_SCROLL_BAR_COLS (f
);
3891 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3892 /* The column of `|' characters separating side-by-side windows
3893 occupies one column only. */
3896 /* On window-systems, areas to the left and right of the window
3897 are used to display bitmaps there. */
3898 if (FRAME_WINDOW_P (f
))
3899 width
-= FRAME_FLAGS_AREA_COLS (f
);
3905 /************************************************************************
3907 ***********************************************************************/
3909 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3910 one screen-full, which is defined as the height of the window minus
3911 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3912 instead. Negative values of N mean scroll down. NOERROR non-zero
3913 means don't signal an error if we try to move over BEGV or ZV,
3917 window_scroll (window
, n
, whole
, noerror
)
3923 /* If we must, use the pixel-based version which is much slower than
3924 the line-based one but can handle varying line heights. */
3925 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3926 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3928 window_scroll_line_based (window
, n
, whole
, noerror
);
3932 /* Implementation of window_scroll that works based on pixel line
3933 heights. See the comment of window_scroll for parameter
3937 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3944 struct window
*w
= XWINDOW (window
);
3945 struct text_pos start
;
3947 int this_scroll_margin
;
3949 /* True if we fiddled the window vscroll field without really scrolling. */
3952 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3954 /* If PT is not visible in WINDOW, move back one half of
3956 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qnil
);
3959 /* Move backward half the height of the window. Performance note:
3960 vmotion used here is about 10% faster, but would give wrong
3961 results for variable height lines. */
3962 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3963 it
.current_y
= it
.last_visible_y
;
3964 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3966 /* The function move_iterator_vertically may move over more than
3967 the specified y-distance. If it->w is small, e.g. a
3968 mini-buffer window, we may end up in front of the window's
3969 display area. This is the case when Start displaying at the
3970 start of the line containing PT in this case. */
3971 if (it
.current_y
<= 0)
3973 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3974 move_it_vertically (&it
, 0);
3978 start
= it
.current
.pos
;
3981 /* If scroll_preserve_screen_position is non-zero, we try to set
3982 point in the same window line as it is now, so get that line. */
3983 if (!NILP (Vscroll_preserve_screen_position
))
3985 start_display (&it
, w
, start
);
3986 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3987 preserve_y
= it
.current_y
;
3992 /* Move iterator it from start the specified distance forward or
3993 backward. The result is the new window start. */
3994 start_display (&it
, w
, start
);
3997 int screen_full
= (it
.last_visible_y
3998 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3999 int direction
= n
< 0 ? -1 : 1;
4000 int dy
= direction
* screen_full
;
4002 /* Note that move_it_vertically always moves the iterator to the
4003 start of a line. So, if the last line doesn't have a newline,
4004 we would end up at the start of the line ending at ZV. */
4006 move_it_vertically_backward (&it
, -dy
);
4008 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4009 MOVE_TO_POS
| MOVE_TO_Y
);
4012 move_it_by_lines (&it
, n
, 1);
4014 /* End if we end up at ZV or BEGV. */
4015 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4016 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4018 if (IT_CHARPOS (it
) == ZV
)
4020 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4021 > it
.last_visible_y
)
4023 /* The last line was only partially visible, make it fully
4025 w
->vscroll
= (it
.last_visible_y
4026 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4027 adjust_glyphs (it
.f
);
4032 Fsignal (Qend_of_buffer
, Qnil
);
4036 if (w
->vscroll
!= 0)
4037 /* The first line was only partially visible, make it fully
4043 Fsignal (Qbeginning_of_buffer
, Qnil
);
4046 /* If control gets here, then we vscrolled. */
4048 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4050 /* Don't try to change the window start below. */
4056 /* Set the window start, and set up the window for redisplay. */
4057 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4059 w
->start_at_line_beg
= Fbolp ();
4060 w
->update_mode_line
= Qt
;
4061 XSETFASTINT (w
->last_modified
, 0);
4062 XSETFASTINT (w
->last_overlay_modified
, 0);
4063 /* Set force_start so that redisplay_window will run the
4064 window-scroll-functions. */
4065 w
->force_start
= Qt
;
4068 it
.current_y
= it
.vpos
= 0;
4070 /* Preserve the screen position if we must. */
4071 if (preserve_y
>= 0)
4073 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4074 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4078 /* Move PT out of scroll margins. */
4079 this_scroll_margin
= max (0, scroll_margin
);
4080 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4081 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4085 /* We moved the window start towards ZV, so PT may be now
4086 in the scroll margin at the top. */
4087 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4088 while (it
.current_y
< this_scroll_margin
)
4089 move_it_by_lines (&it
, 1, 1);
4090 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4094 int charpos
, bytepos
;
4096 /* We moved the window start towards BEGV, so PT may be now
4097 in the scroll margin at the bottom. */
4098 move_it_to (&it
, PT
, -1,
4099 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4100 MOVE_TO_POS
| MOVE_TO_Y
);
4102 /* Save our position, in case it's correct. */
4103 charpos
= IT_CHARPOS (it
);
4104 bytepos
= IT_BYTEPOS (it
);
4106 /* See if point is on a partially visible line at the end. */
4107 move_it_by_lines (&it
, 1, 1);
4108 if (it
.current_y
> it
.last_visible_y
)
4109 /* The last line was only partially visible, so back up two
4110 lines to make sure we're on a fully visible line. */
4112 move_it_by_lines (&it
, -2, 0);
4113 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4116 /* No, the position we saved is OK, so use it. */
4117 SET_PT_BOTH (charpos
, bytepos
);
4123 /* Implementation of window_scroll that works based on screen lines.
4124 See the comment of window_scroll for parameter descriptions. */
4127 window_scroll_line_based (window
, n
, whole
, noerror
)
4133 register struct window
*w
= XWINDOW (window
);
4134 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4135 register int pos
, pos_byte
;
4136 register int ht
= window_internal_height (w
);
4137 register Lisp_Object tem
;
4141 struct position posit
;
4144 startpos
= marker_position (w
->start
);
4146 posit
= *compute_motion (startpos
, 0, 0, 0,
4148 window_internal_width (w
), XINT (w
->hscroll
),
4150 original_vpos
= posit
.vpos
;
4152 XSETFASTINT (tem
, PT
);
4153 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4157 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4162 lose
= n
< 0 && PT
== BEGV
;
4163 Fvertical_motion (make_number (n
), window
);
4167 SET_PT_BOTH (opoint
, opoint_byte
);
4174 Fsignal (Qbeginning_of_buffer
, Qnil
);
4179 int this_scroll_margin
= scroll_margin
;
4181 /* Don't use a scroll margin that is negative or too large. */
4182 if (this_scroll_margin
< 0)
4183 this_scroll_margin
= 0;
4185 if (XINT (w
->height
) < 4 * scroll_margin
)
4186 this_scroll_margin
= XINT (w
->height
) / 4;
4188 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4189 w
->start_at_line_beg
= bolp
;
4190 w
->update_mode_line
= Qt
;
4191 XSETFASTINT (w
->last_modified
, 0);
4192 XSETFASTINT (w
->last_overlay_modified
, 0);
4193 /* Set force_start so that redisplay_window will run
4194 the window-scroll-functions. */
4195 w
->force_start
= Qt
;
4197 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4199 SET_PT_BOTH (pos
, pos_byte
);
4200 Fvertical_motion (make_number (original_vpos
), window
);
4202 /* If we scrolled forward, put point enough lines down
4203 that it is outside the scroll margin. */
4208 if (this_scroll_margin
> 0)
4210 SET_PT_BOTH (pos
, pos_byte
);
4211 Fvertical_motion (make_number (this_scroll_margin
), window
);
4217 if (top_margin
<= opoint
)
4218 SET_PT_BOTH (opoint
, opoint_byte
);
4219 else if (!NILP (Vscroll_preserve_screen_position
))
4221 SET_PT_BOTH (pos
, pos_byte
);
4222 Fvertical_motion (make_number (original_vpos
), window
);
4225 SET_PT (top_margin
);
4231 /* If we scrolled backward, put point near the end of the window
4232 but not within the scroll margin. */
4233 SET_PT_BOTH (pos
, pos_byte
);
4234 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4235 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4238 bottom_margin
= PT
+ 1;
4240 if (bottom_margin
> opoint
)
4241 SET_PT_BOTH (opoint
, opoint_byte
);
4244 if (!NILP (Vscroll_preserve_screen_position
))
4246 SET_PT_BOTH (pos
, pos_byte
);
4247 Fvertical_motion (make_number (original_vpos
), window
);
4250 Fvertical_motion (make_number (-1), window
);
4259 Fsignal (Qend_of_buffer
, Qnil
);
4264 /* Scroll selected_window up or down. If N is nil, scroll a
4265 screen-full which is defined as the height of the window minus
4266 next_screen_context_lines. If N is the symbol `-', scroll.
4267 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4268 up. This is the guts of Fscroll_up and Fscroll_down. */
4271 scroll_command (n
, direction
)
4275 register int defalt
;
4276 int count
= specpdl_ptr
- specpdl
;
4278 xassert (abs (direction
) == 1);
4280 /* If selected window's buffer isn't current, make it current for
4281 the moment. But don't screw up if window_scroll gets an error. */
4282 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4284 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4285 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4287 /* Make redisplay consider other windows than just selected_window. */
4288 ++windows_or_buffers_changed
;
4291 defalt
= (window_internal_height (XWINDOW (selected_window
))
4292 - next_screen_context_lines
);
4293 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4296 window_scroll (selected_window
, defalt
, 1, 0);
4297 else if (EQ (n
, Qminus
))
4298 window_scroll (selected_window
, - defalt
, 1, 0);
4301 n
= Fprefix_numeric_value (n
);
4302 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4305 unbind_to (count
, Qnil
);
4308 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4309 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4310 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4311 Negative ARG means scroll downward.\n\
4312 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4313 When calling from a program, supply as argument a number, nil, or `-'.")
4317 scroll_command (arg
, 1);
4321 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4322 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4323 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4324 Negative ARG means scroll upward.\n\
4325 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4326 When calling from a program, supply as argument a number, nil, or `-'.")
4330 scroll_command (arg
, -1);
4334 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4335 "Return the other window for \"other window scroll\" commands.\n\
4336 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4337 specifies the window.\n\
4338 If `other-window-scroll-buffer' is non-nil, a window\n\
4339 showing that buffer is used.")
4344 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4345 && !NILP (Vminibuf_scroll_window
))
4346 window
= Vminibuf_scroll_window
;
4347 /* If buffer is specified, scroll that buffer. */
4348 else if (!NILP (Vother_window_scroll_buffer
))
4350 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4352 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4356 /* Nothing specified; look for a neighboring window on the same
4358 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4360 if (EQ (window
, selected_window
))
4361 /* That didn't get us anywhere; look for a window on another
4364 window
= Fnext_window (window
, Qnil
, Qt
);
4365 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4366 && ! EQ (window
, selected_window
));
4369 CHECK_LIVE_WINDOW (window
, 0);
4371 if (EQ (window
, selected_window
))
4372 error ("There is no other window");
4377 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4378 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4379 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4380 The next window is the one below the current one; or the one at the top\n\
4381 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4382 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4383 When calling from a program, supply as argument a number, nil, or `-'.\n\
4385 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4386 specifies the window to scroll.\n\
4387 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4388 showing that buffer, popping the buffer up if necessary.")
4390 register Lisp_Object arg
;
4392 register Lisp_Object window
;
4393 register int defalt
;
4394 register struct window
*w
;
4395 register int count
= specpdl_ptr
- specpdl
;
4397 window
= Fother_window_for_scrolling ();
4399 w
= XWINDOW (window
);
4400 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4401 if (defalt
< 1) defalt
= 1;
4403 /* Don't screw up if window_scroll gets an error. */
4404 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4405 ++windows_or_buffers_changed
;
4407 Fset_buffer (w
->buffer
);
4408 SET_PT (marker_position (w
->pointm
));
4411 window_scroll (window
, defalt
, 1, 1);
4412 else if (EQ (arg
, Qminus
))
4413 window_scroll (window
, -defalt
, 1, 1);
4418 CHECK_NUMBER (arg
, 0);
4419 window_scroll (window
, XINT (arg
), 0, 1);
4422 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4423 unbind_to (count
, Qnil
);
4428 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4429 "Scroll selected window display ARG columns left.\n\
4430 Default for ARG is window width minus 2.")
4432 register Lisp_Object arg
;
4436 struct window
*w
= XWINDOW (selected_window
);
4439 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4441 arg
= Fprefix_numeric_value (arg
);
4443 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
4444 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4446 if (interactive_p (0))
4447 w
->min_hscroll
= w
->hscroll
;
4452 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4453 "Scroll selected window display ARG columns right.\n\
4454 Default for ARG is window width minus 2.")
4456 register Lisp_Object arg
;
4460 struct window
*w
= XWINDOW (selected_window
);
4463 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4465 arg
= Fprefix_numeric_value (arg
);
4467 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
4468 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4470 if (interactive_p (0))
4471 w
->min_hscroll
= w
->hscroll
;
4476 /* Value is the number of lines actually displayed in window W,
4477 as opposed to its height. */
4480 displayed_window_lines (w
)
4484 struct text_pos start
;
4485 int height
= window_box_height (w
);
4486 struct buffer
*old_buffer
;
4489 if (XBUFFER (w
->buffer
) != current_buffer
)
4491 old_buffer
= current_buffer
;
4492 set_buffer_internal (XBUFFER (w
->buffer
));
4497 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4498 start_display (&it
, w
, start
);
4499 move_it_vertically (&it
, height
);
4500 bottom_y
= line_bottom_y (&it
);
4502 /* Add in empty lines at the bottom of the window. */
4503 if (bottom_y
< height
)
4505 int uy
= CANON_Y_UNIT (it
.f
);
4506 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
4510 set_buffer_internal (old_buffer
);
4516 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4517 "Center point in window and redisplay frame.\n\
4518 With prefix argument ARG, recenter putting point on screen line ARG\n\
4519 relative to the current window. If ARG is negative, it counts up from the\n\
4520 bottom of the window. (ARG should be less than the height of the window.)\n\
4522 If ARG is omitted or nil, erase the entire frame and then\n\
4523 redraw with point in the center of the current window.\n\
4524 Just C-u as prefix means put point in the center of the window\n\
4525 and redisplay normally--don't erase and redraw the frame.")
4527 register Lisp_Object arg
;
4529 struct window
*w
= XWINDOW (selected_window
);
4530 struct buffer
*buf
= XBUFFER (w
->buffer
);
4531 struct buffer
*obuf
= current_buffer
;
4533 int charpos
, bytepos
;
4539 /* Invalidate pixel data calculated for all compositions. */
4540 for (i
= 0; i
< n_compositions
; i
++)
4541 composition_table
[i
]->font
= NULL
;
4543 Fredraw_frame (w
->frame
);
4544 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4547 else if (CONSP (arg
)) /* Just C-u. */
4551 arg
= Fprefix_numeric_value (arg
);
4552 CHECK_NUMBER (arg
, 0);
4555 set_buffer_internal (buf
);
4557 /* Handle centering on a gfaphical frame specially. Such frames can
4558 have variable-height lines and centering point on the basis of
4559 line counts would lead to strange effects. */
4560 if (center_p
&& FRAME_WINDOW_P (XFRAME (w
->frame
)))
4565 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4566 start_display (&it
, w
, pt
);
4567 move_it_vertically (&it
, - it
.last_visible_y
/ 2);
4568 charpos
= IT_CHARPOS (it
);
4569 bytepos
= IT_BYTEPOS (it
);
4573 struct position pos
;
4577 int ht
= displayed_window_lines (w
);
4578 arg
= make_number (ht
/ 2);
4580 else if (XINT (arg
) < 0)
4582 int ht
= displayed_window_lines (w
);
4583 XSETINT (arg
, XINT (arg
) + ht
);
4586 pos
= *vmotion (PT
, - XINT (arg
), w
);
4587 charpos
= pos
.bufpos
;
4588 bytepos
= pos
.bytepos
;
4591 /* Set the new window start. */
4592 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4593 w
->window_end_valid
= Qnil
;
4594 w
->force_start
= Qt
;
4595 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4596 w
->start_at_line_beg
= Qt
;
4598 w
->start_at_line_beg
= Qnil
;
4600 set_buffer_internal (obuf
);
4605 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4607 "Return the height in lines of the text display area of WINDOW.\n\
4608 This doesn't include the mode-line (or header-line if any) or any\n\
4609 partial-height lines in the text display area.")
4613 struct window
*w
= decode_window (window
);
4614 int pixel_height
= window_box_height (w
);
4615 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4616 return make_number (line_height
);
4621 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4623 "Position point relative to window.\n\
4624 With no argument, position point at center of window.\n\
4625 An argument specifies vertical position within the window;\n\
4626 zero means top of window, negative means relative to bottom of window.")
4630 struct window
*w
= XWINDOW (selected_window
);
4634 window
= selected_window
;
4635 start
= marker_position (w
->start
);
4636 if (start
< BEGV
|| start
> ZV
)
4638 int height
= window_internal_height (w
);
4639 Fvertical_motion (make_number (- (height
/ 2)), window
);
4640 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4641 w
->start_at_line_beg
= Fbolp ();
4642 w
->force_start
= Qt
;
4645 Fgoto_char (w
->start
);
4647 lines
= displayed_window_lines (w
);
4649 XSETFASTINT (arg
, lines
/ 2);
4652 arg
= Fprefix_numeric_value (arg
);
4654 XSETINT (arg
, XINT (arg
) + lines
);
4657 /* Skip past a partially visible first line. */
4659 XSETINT (arg
, XINT (arg
) + 1);
4661 return Fvertical_motion (arg
, window
);
4666 /***********************************************************************
4667 Window Configuration
4668 ***********************************************************************/
4670 struct save_window_data
4672 EMACS_INT size_from_Lisp_Vector_struct
;
4673 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4674 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4675 Lisp_Object frame_tool_bar_lines
;
4676 Lisp_Object selected_frame
;
4677 Lisp_Object current_window
;
4678 Lisp_Object current_buffer
;
4679 Lisp_Object minibuf_scroll_window
;
4680 Lisp_Object root_window
;
4681 Lisp_Object focus_frame
;
4682 /* Record the values of window-min-width and window-min-height
4683 so that window sizes remain consistent with them. */
4684 Lisp_Object min_width
, min_height
;
4685 /* A vector, each of whose elements is a struct saved_window
4687 Lisp_Object saved_windows
;
4690 /* This is saved as a Lisp_Vector */
4693 /* these first two must agree with struct Lisp_Vector in lisp.h */
4694 EMACS_INT size_from_Lisp_Vector_struct
;
4695 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4698 Lisp_Object buffer
, start
, pointm
, mark
;
4699 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4700 Lisp_Object parent
, prev
;
4701 Lisp_Object start_at_line_beg
;
4702 Lisp_Object display_table
;
4703 Lisp_Object orig_top
, orig_height
;
4706 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4708 #define SAVED_WINDOW_N(swv,n) \
4709 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4711 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4712 "Return t if OBJECT is a window-configuration object.")
4716 if (WINDOW_CONFIGURATIONP (object
))
4721 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4722 "Return the frame that CONFIG, a window-configuration object, is about.")
4726 register struct save_window_data
*data
;
4727 struct Lisp_Vector
*saved_windows
;
4729 if (! WINDOW_CONFIGURATIONP (config
))
4730 wrong_type_argument (Qwindow_configuration_p
, config
);
4732 data
= (struct save_window_data
*) XVECTOR (config
);
4733 saved_windows
= XVECTOR (data
->saved_windows
);
4734 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4737 DEFUN ("set-window-configuration", Fset_window_configuration
,
4738 Sset_window_configuration
, 1, 1, 0,
4739 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4740 CONFIGURATION must be a value previously returned\n\
4741 by `current-window-configuration' (which see).\n\
4742 If CONFIGURATION was made from a frame that is now deleted,\n\
4743 only frame-independent values can be restored. In this case,\n\
4744 the return value is nil. Otherwise the value is t.")
4746 Lisp_Object configuration
;
4748 register struct save_window_data
*data
;
4749 struct Lisp_Vector
*saved_windows
;
4750 Lisp_Object new_current_buffer
;
4755 while (!WINDOW_CONFIGURATIONP (configuration
))
4756 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4758 data
= (struct save_window_data
*) XVECTOR (configuration
);
4759 saved_windows
= XVECTOR (data
->saved_windows
);
4761 new_current_buffer
= data
->current_buffer
;
4762 if (NILP (XBUFFER (new_current_buffer
)->name
))
4763 new_current_buffer
= Qnil
;
4766 if (XBUFFER (new_current_buffer
) == current_buffer
)
4770 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4773 /* If f is a dead frame, don't bother rebuilding its window tree.
4774 However, there is other stuff we should still try to do below. */
4775 if (FRAME_LIVE_P (f
))
4777 register struct window
*w
;
4778 register struct saved_window
*p
;
4779 struct window
*root_window
;
4780 struct window
**leaf_windows
;
4784 /* If the frame has been resized since this window configuration was
4785 made, we change the frame to the size specified in the
4786 configuration, restore the configuration, and then resize it
4787 back. We keep track of the prevailing height in these variables. */
4788 int previous_frame_height
= FRAME_HEIGHT (f
);
4789 int previous_frame_width
= FRAME_WIDTH (f
);
4790 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4791 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4793 /* The mouse highlighting code could get screwed up
4794 if it runs during this. */
4797 if (XFASTINT (data
->frame_height
) != previous_frame_height
4798 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4799 change_frame_size (f
, XFASTINT (data
->frame_height
),
4800 XFASTINT (data
->frame_width
), 0, 0, 0);
4801 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4802 if (XFASTINT (data
->frame_menu_bar_lines
)
4803 != previous_frame_menu_bar_lines
)
4804 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4805 #ifdef HAVE_WINDOW_SYSTEM
4806 if (XFASTINT (data
->frame_tool_bar_lines
)
4807 != previous_frame_tool_bar_lines
)
4808 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4812 /* "Swap out" point from the selected window
4813 into its buffer. We do this now, before
4814 restoring the window contents, and prevent it from
4815 being done later on when we select a new window. */
4816 if (! NILP (XWINDOW (selected_window
)->buffer
))
4818 w
= XWINDOW (selected_window
);
4819 set_marker_both (w
->pointm
,
4821 BUF_PT (XBUFFER (w
->buffer
)),
4822 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4825 windows_or_buffers_changed
++;
4826 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4828 /* Problem: Freeing all matrices and later allocating them again
4829 is a serious redisplay flickering problem. What we would
4830 really like to do is to free only those matrices not reused
4832 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4834 = (struct window
**) alloca (count_windows (root_window
)
4835 * sizeof (struct window
*));
4836 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4838 /* Temporarily avoid any problems with windows that are smaller
4839 than they are supposed to be. */
4840 window_min_height
= 1;
4841 window_min_width
= 1;
4844 Mark all windows now on frame as "deleted".
4845 Restoring the new configuration "undeletes" any that are in it.
4847 Save their current buffers in their height fields, since we may
4848 need it later, if a buffer saved in the configuration is now
4850 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4852 for (k
= 0; k
< saved_windows
->size
; k
++)
4854 p
= SAVED_WINDOW_N (saved_windows
, k
);
4855 w
= XWINDOW (p
->window
);
4858 if (!NILP (p
->parent
))
4859 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4860 XFASTINT (p
->parent
))->window
;
4864 if (!NILP (p
->prev
))
4866 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4867 XFASTINT (p
->prev
))->window
;
4868 XWINDOW (w
->prev
)->next
= p
->window
;
4873 if (!NILP (w
->parent
))
4875 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4877 XWINDOW (w
->parent
)->vchild
= p
->window
;
4878 XWINDOW (w
->parent
)->hchild
= Qnil
;
4882 XWINDOW (w
->parent
)->hchild
= p
->window
;
4883 XWINDOW (w
->parent
)->vchild
= Qnil
;
4888 /* If we squirreled away the buffer in the window's height,
4890 if (BUFFERP (w
->height
))
4891 w
->buffer
= w
->height
;
4894 w
->width
= p
->width
;
4895 w
->height
= p
->height
;
4896 w
->hscroll
= p
->hscroll
;
4897 w
->min_hscroll
= p
->min_hscroll
;
4898 w
->display_table
= p
->display_table
;
4899 w
->orig_top
= p
->orig_top
;
4900 w
->orig_height
= p
->orig_height
;
4901 XSETFASTINT (w
->last_modified
, 0);
4902 XSETFASTINT (w
->last_overlay_modified
, 0);
4904 /* Reinstall the saved buffer and pointers into it. */
4905 if (NILP (p
->buffer
))
4906 w
->buffer
= p
->buffer
;
4909 if (!NILP (XBUFFER (p
->buffer
)->name
))
4910 /* If saved buffer is alive, install it. */
4912 w
->buffer
= p
->buffer
;
4913 w
->start_at_line_beg
= p
->start_at_line_beg
;
4914 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4915 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4916 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4917 p
->mark
, w
->buffer
);
4919 /* As documented in Fcurrent_window_configuration, don't
4920 save the location of point in the buffer which was current
4921 when the window configuration was recorded. */
4922 if (!EQ (p
->buffer
, new_current_buffer
)
4923 && XBUFFER (p
->buffer
) == current_buffer
)
4924 Fgoto_char (w
->pointm
);
4926 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4927 /* Else unless window has a live buffer, get one. */
4929 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4930 /* This will set the markers to beginning of visible
4932 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4933 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4934 w
->start_at_line_beg
= Qt
;
4937 /* Keeping window's old buffer; make sure the markers
4940 /* Set window markers at start of visible range. */
4941 if (XMARKER (w
->start
)->buffer
== 0)
4942 set_marker_restricted (w
->start
, make_number (0),
4944 if (XMARKER (w
->pointm
)->buffer
== 0)
4945 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4946 BUF_PT (XBUFFER (w
->buffer
)),
4947 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4948 w
->start_at_line_beg
= Qt
;
4953 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4954 /* Prevent "swapping out point" in the old selected window
4955 using the buffer that has been restored into it.
4956 That swapping out has already been done,
4957 near the beginning of this function. */
4958 selected_window
= Qnil
;
4959 Fselect_window (data
->current_window
);
4960 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4963 if (NILP (data
->focus_frame
)
4964 || (FRAMEP (data
->focus_frame
)
4965 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4966 Fredirect_frame_focus (frame
, data
->focus_frame
);
4968 #if 0 /* I don't understand why this is needed, and it causes problems
4969 when the frame's old selected window has been deleted. */
4970 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4971 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4975 /* Set the screen height to the value it had before this function. */
4976 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4977 || previous_frame_width
!= FRAME_WIDTH (f
))
4978 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4980 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4981 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4982 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4984 #ifdef HAVE_WINDOW_SYSTEM
4985 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4986 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4991 /* Now, free glyph matrices in windows that were not reused. */
4992 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4994 if (NILP (leaf_windows
[i
]->buffer
))
4996 /* Assert it's not reused as a combination. */
4997 xassert (NILP (leaf_windows
[i
]->hchild
)
4998 && NILP (leaf_windows
[i
]->vchild
));
4999 free_window_matrices (leaf_windows
[i
]);
5001 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5005 /* If more than one window shows the new and old current buffer,
5006 don't try to preserve point in that buffer. */
5007 if (old_point
> 0 && n
> 1)
5014 /* Fselect_window will have made f the selected frame, so we
5015 reselect the proper frame here. Fhandle_switch_frame will change the
5016 selected window too, but that doesn't make the call to
5017 Fselect_window above totally superfluous; it still sets f's
5019 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5020 do_switch_frame (data
->selected_frame
, Qnil
, 0);
5022 if (! NILP (Vwindow_configuration_change_hook
)
5023 && ! NILP (Vrun_hooks
))
5024 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5027 if (!NILP (new_current_buffer
))
5029 Fset_buffer (new_current_buffer
);
5031 /* If the buffer that is current now is the same
5032 that was current before setting the window configuration,
5033 don't alter its PT. */
5038 /* Restore the minimum heights recorded in the configuration. */
5039 window_min_height
= XINT (data
->min_height
);
5040 window_min_width
= XINT (data
->min_width
);
5042 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5044 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5047 /* Mark all windows now on frame as deleted
5048 by setting their buffers to nil. */
5051 delete_all_subwindows (w
)
5052 register struct window
*w
;
5054 if (!NILP (w
->next
))
5055 delete_all_subwindows (XWINDOW (w
->next
));
5056 if (!NILP (w
->vchild
))
5057 delete_all_subwindows (XWINDOW (w
->vchild
));
5058 if (!NILP (w
->hchild
))
5059 delete_all_subwindows (XWINDOW (w
->hchild
));
5061 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5063 if (!NILP (w
->buffer
))
5066 /* We set all three of these fields to nil, to make sure that we can
5067 distinguish this dead window from any live window. Live leaf
5068 windows will have buffer set, and combination windows will have
5069 vchild or hchild set. */
5074 Vwindow_list
= Qnil
;
5078 count_windows (window
)
5079 register struct window
*window
;
5081 register int count
= 1;
5082 if (!NILP (window
->next
))
5083 count
+= count_windows (XWINDOW (window
->next
));
5084 if (!NILP (window
->vchild
))
5085 count
+= count_windows (XWINDOW (window
->vchild
));
5086 if (!NILP (window
->hchild
))
5087 count
+= count_windows (XWINDOW (window
->hchild
));
5092 /* Fill vector FLAT with leaf windows under W, starting at index I.
5093 Value is last index + 1. */
5096 get_leaf_windows (w
, flat
, i
)
5098 struct window
**flat
;
5103 if (!NILP (w
->hchild
))
5104 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5105 else if (!NILP (w
->vchild
))
5106 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5110 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5117 /* Return a pointer to the glyph W's physical cursor is on. Value is
5118 null if W's current matrix is invalid, so that no meaningfull glyph
5122 get_phys_cursor_glyph (w
)
5125 struct glyph_row
*row
;
5126 struct glyph
*glyph
;
5128 if (w
->phys_cursor
.vpos
>= 0
5129 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5130 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5132 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5133 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5142 save_window_save (window
, vector
, i
)
5144 struct Lisp_Vector
*vector
;
5147 register struct saved_window
*p
;
5148 register struct window
*w
;
5149 register Lisp_Object tem
;
5151 for (;!NILP (window
); window
= w
->next
)
5153 p
= SAVED_WINDOW_N (vector
, i
);
5154 w
= XWINDOW (window
);
5156 XSETFASTINT (w
->temslot
, i
++);
5158 p
->buffer
= w
->buffer
;
5161 p
->width
= w
->width
;
5162 p
->height
= w
->height
;
5163 p
->hscroll
= w
->hscroll
;
5164 p
->min_hscroll
= w
->min_hscroll
;
5165 p
->display_table
= w
->display_table
;
5166 p
->orig_top
= w
->orig_top
;
5167 p
->orig_height
= w
->orig_height
;
5168 if (!NILP (w
->buffer
))
5170 /* Save w's value of point in the window configuration.
5171 If w is the selected window, then get the value of point
5172 from the buffer; pointm is garbage in the selected window. */
5173 if (EQ (window
, selected_window
))
5175 p
->pointm
= Fmake_marker ();
5176 set_marker_both (p
->pointm
, w
->buffer
,
5177 BUF_PT (XBUFFER (w
->buffer
)),
5178 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5181 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5183 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5184 p
->start_at_line_beg
= w
->start_at_line_beg
;
5186 tem
= XBUFFER (w
->buffer
)->mark
;
5187 p
->mark
= Fcopy_marker (tem
, Qnil
);
5194 p
->start_at_line_beg
= Qnil
;
5197 if (NILP (w
->parent
))
5200 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5205 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5207 if (!NILP (w
->vchild
))
5208 i
= save_window_save (w
->vchild
, vector
, i
);
5209 if (!NILP (w
->hchild
))
5210 i
= save_window_save (w
->hchild
, vector
, i
);
5216 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5217 Scurrent_window_configuration
, 0, 1, 0,
5218 "Return an object representing the current window configuration of FRAME.\n\
5219 If FRAME is nil or omitted, use the selected frame.\n\
5220 This describes the number of windows, their sizes and current buffers,\n\
5221 and for each displayed buffer, where display starts, and the positions of\n\
5222 point and mark. An exception is made for point in the current buffer:\n\
5223 its value is -not- saved.\n\
5224 This also records the currently selected frame, and FRAME's focus\n\
5225 redirection (see `redirect-frame-focus').")
5229 register Lisp_Object tem
;
5230 register int n_windows
;
5231 register struct save_window_data
*data
;
5232 register struct Lisp_Vector
*vec
;
5237 frame
= selected_frame
;
5238 CHECK_LIVE_FRAME (frame
, 0);
5241 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5242 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
5243 data
= (struct save_window_data
*)vec
;
5245 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5246 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5247 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5248 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5249 data
->selected_frame
= selected_frame
;
5250 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5251 XSETBUFFER (data
->current_buffer
, current_buffer
);
5252 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5253 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5254 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5255 XSETINT (data
->min_height
, window_min_height
);
5256 XSETINT (data
->min_width
, window_min_width
);
5257 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5258 data
->saved_windows
= tem
;
5259 for (i
= 0; i
< n_windows
; i
++)
5260 XVECTOR (tem
)->contents
[i
]
5261 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5262 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5263 XSETWINDOW_CONFIGURATION (tem
, data
);
5267 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5269 "Execute body, preserving window sizes and contents.\n\
5270 Restore which buffer appears in which window, where display starts,\n\
5271 and the value of point and mark for each window.\n\
5272 Also restore the choice of selected window.\n\
5273 Also restore which buffer is current.\n\
5274 Does not restore the value of point in current buffer.")
5278 register Lisp_Object val
;
5279 register int count
= specpdl_ptr
- specpdl
;
5281 record_unwind_protect (Fset_window_configuration
,
5282 Fcurrent_window_configuration (Qnil
));
5283 val
= Fprogn (args
);
5284 return unbind_to (count
, val
);
5288 /***********************************************************************
5290 ***********************************************************************/
5292 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5294 "Set width of marginal areas of window WINDOW.\n\
5295 If window is nil, set margins of the currently selected window.\n\
5296 First parameter LEFT-WIDTH specifies the number of character\n\
5297 cells to reserve for the left marginal area. Second parameter\n\
5298 RIGHT-WIDTH does the same for the right marginal area.\n\
5299 A nil width parameter means no margin.")
5300 (window
, left
, right
)
5301 Lisp_Object window
, left
, right
;
5303 struct window
*w
= decode_window (window
);
5306 CHECK_NUMBER_OR_FLOAT (left
, 1);
5308 CHECK_NUMBER_OR_FLOAT (right
, 2);
5310 /* Check widths < 0 and translate a zero width to nil.
5311 Margins that are too wide have to be checked elsewhere. */
5312 if ((INTEGERP (left
) && XINT (left
) < 0)
5313 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5314 XSETFASTINT (left
, 0);
5315 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5318 if ((INTEGERP (right
) && XINT (right
) < 0)
5319 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5320 XSETFASTINT (right
, 0);
5321 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5324 w
->left_margin_width
= left
;
5325 w
->right_margin_width
= right
;
5327 ++windows_or_buffers_changed
;
5328 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5333 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5335 "Get width of marginal areas of window WINDOW.\n\
5336 If WINDOW is omitted or nil, use the currently selected window.\n\
5337 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5338 If a marginal area does not exist, its width will be returned\n\
5343 struct window
*w
= decode_window (window
);
5344 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5349 /***********************************************************************
5351 ***********************************************************************/
5353 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5354 "Return the amount by which WINDOW is scrolled vertically.\n\
5355 Use the selected window if WINDOW is nil or omitted.\n\
5356 Value is a multiple of the canonical character height of WINDOW.")
5365 window
= selected_window
;
5367 CHECK_WINDOW (window
, 0);
5368 w
= XWINDOW (window
);
5369 f
= XFRAME (w
->frame
);
5371 if (FRAME_WINDOW_P (f
))
5372 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5374 result
= make_number (0);
5379 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5381 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5382 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5383 non-negative multiple of the canonical character height of WINDOW.")
5385 Lisp_Object window
, vscroll
;
5391 window
= selected_window
;
5393 CHECK_WINDOW (window
, 0);
5394 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5396 w
= XWINDOW (window
);
5397 f
= XFRAME (w
->frame
);
5399 if (FRAME_WINDOW_P (f
))
5401 int old_dy
= w
->vscroll
;
5403 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5404 w
->vscroll
= min (w
->vscroll
, 0);
5406 /* Adjust glyph matrix of the frame if the virtual display
5407 area becomes larger than before. */
5408 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5411 /* Prevent redisplay shortcuts. */
5412 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5415 return Fwindow_vscroll (window
);
5419 /* Call FN for all leaf windows on frame F. FN is called with the
5420 first argument being a pointer to the leaf window, and with
5421 additional argument USER_DATA. Stops when FN returns 0. */
5424 foreach_window (f
, fn
, user_data
)
5426 int (* fn
) P_ ((struct window
*, void *));
5429 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5433 /* Helper function for foreach_window. Call FN for all leaf windows
5434 reachable from W. FN is called with the first argument being a
5435 pointer to the leaf window, and with additional argument USER_DATA.
5436 Stop when FN returns 0. Value is 0 if stopped by FN. */
5439 foreach_window_1 (w
, fn
, user_data
)
5441 int (* fn
) P_ ((struct window
*, void *));
5446 for (cont
= 1; w
&& cont
;)
5448 if (!NILP (w
->hchild
))
5449 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5450 else if (!NILP (w
->vchild
))
5451 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5453 cont
= fn (w
, user_data
);
5455 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5462 /* Freeze or unfreeze the window start of W if unless it is a
5463 mini-window or the selected window. FREEZE_P non-null means freeze
5464 the window start. */
5467 freeze_window_start (w
, freeze_p
)
5471 if (w
== XWINDOW (selected_window
)
5472 || MINI_WINDOW_P (w
)
5473 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5474 && ! NILP (Vminibuf_scroll_window
)
5475 && w
== XWINDOW (Vminibuf_scroll_window
)))
5478 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5483 /* Freeze or unfreeze the window starts of all leaf windows on frame
5484 F, except the selected window and a mini-window. FREEZE_P non-zero
5485 means freeze the window start. */
5488 freeze_window_starts (f
, freeze_p
)
5492 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5496 /***********************************************************************
5498 ***********************************************************************/
5500 /* Return 1 if window configurations C1 and C2
5501 describe the same state of affairs. This is used by Fequal. */
5504 compare_window_configurations (c1
, c2
, ignore_positions
)
5506 int ignore_positions
;
5508 register struct save_window_data
*d1
, *d2
;
5509 struct Lisp_Vector
*sw1
, *sw2
;
5512 if (!WINDOW_CONFIGURATIONP (c1
))
5513 wrong_type_argument (Qwindow_configuration_p
, c1
);
5514 if (!WINDOW_CONFIGURATIONP (c2
))
5515 wrong_type_argument (Qwindow_configuration_p
, c2
);
5517 d1
= (struct save_window_data
*) XVECTOR (c1
);
5518 d2
= (struct save_window_data
*) XVECTOR (c2
);
5519 sw1
= XVECTOR (d1
->saved_windows
);
5520 sw2
= XVECTOR (d2
->saved_windows
);
5522 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5524 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5526 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5528 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5530 /* Don't compare the current_window field directly.
5531 Instead see w1_is_current and w2_is_current, below. */
5532 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5534 if (! ignore_positions
)
5535 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5537 /* Don't compare the root_window field.
5538 We don't require the two configurations
5539 to use the same window object,
5540 and the two root windows must be equivalent
5541 if everything else compares equal. */
5542 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5544 if (! EQ (d1
->min_width
, d2
->min_width
))
5546 if (! EQ (d1
->min_height
, d2
->min_height
))
5549 /* Verify that the two confis have the same number of windows. */
5550 if (sw1
->size
!= sw2
->size
)
5553 for (i
= 0; i
< sw1
->size
; i
++)
5555 struct saved_window
*p1
, *p2
;
5556 int w1_is_current
, w2_is_current
;
5558 p1
= SAVED_WINDOW_N (sw1
, i
);
5559 p2
= SAVED_WINDOW_N (sw2
, i
);
5561 /* Verify that the current windows in the two
5562 configurations correspond to each other. */
5563 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5564 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5566 if (w1_is_current
!= w2_is_current
)
5569 /* Verify that the corresponding windows do match. */
5570 if (! EQ (p1
->buffer
, p2
->buffer
))
5572 if (! EQ (p1
->left
, p2
->left
))
5574 if (! EQ (p1
->top
, p2
->top
))
5576 if (! EQ (p1
->width
, p2
->width
))
5578 if (! EQ (p1
->height
, p2
->height
))
5580 if (! EQ (p1
->display_table
, p2
->display_table
))
5582 if (! EQ (p1
->parent
, p2
->parent
))
5584 if (! EQ (p1
->prev
, p2
->prev
))
5586 if (! ignore_positions
)
5588 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5590 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5592 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5594 if (NILP (Fequal (p1
->start
, p2
->start
)))
5596 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5598 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5606 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5607 Scompare_window_configurations
, 2, 2, 0,
5608 "Compare two window configurations as regards the structure of windows.\n\
5609 This function ignores details such as the values of point and mark\n\
5610 and scrolling positions.")
5614 if (compare_window_configurations (x
, y
, 1))
5622 struct frame
*f
= make_terminal_frame ();
5623 XSETFRAME (selected_frame
, f
);
5624 Vterminal_frame
= selected_frame
;
5625 minibuf_window
= f
->minibuffer_window
;
5626 selected_window
= f
->selected_window
;
5627 last_nonminibuf_frame
= f
;
5629 window_initialized
= 1;
5635 Vwindow_list
= Qnil
;
5641 Qleft_fringe
= intern ("left-fringe");
5642 staticpro (&Qleft_fringe
);
5643 Qright_fringe
= intern ("right-fringe");
5644 staticpro (&Qright_fringe
);
5646 Qwindow_size_fixed
= intern ("window-size-fixed");
5647 staticpro (&Qwindow_size_fixed
);
5649 staticpro (&Qwindow_configuration_change_hook
);
5650 Qwindow_configuration_change_hook
5651 = intern ("window-configuration-change-hook");
5653 Qwindowp
= intern ("windowp");
5654 staticpro (&Qwindowp
);
5656 Qwindow_configuration_p
= intern ("window-configuration-p");
5657 staticpro (&Qwindow_configuration_p
);
5659 Qwindow_live_p
= intern ("window-live-p");
5660 staticpro (&Qwindow_live_p
);
5662 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5663 staticpro (&Qtemp_buffer_show_hook
);
5665 staticpro (&Vwindow_list
);
5667 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5668 "Non-nil means call as function to display a help buffer.\n\
5669 The function is called with one argument, the buffer to be displayed.\n\
5670 Used by `with-output-to-temp-buffer'.\n\
5671 If this function is used, then it must do the entire job of showing\n\
5672 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5673 Vtemp_buffer_show_function
= Qnil
;
5675 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5676 "If non-nil, function to call to handle `display-buffer'.\n\
5677 It will receive two args, the buffer and a flag which if non-nil means\n\
5678 that the currently selected window is not acceptable.\n\
5679 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5680 work using this function.");
5681 Vdisplay_buffer_function
= Qnil
;
5683 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5684 "*If non-nil, `display-buffer' should even the window heights.\n\
5685 If nil, `display-buffer' will leave the window configuration alone.");
5686 Veven_window_heights
= Qt
;
5688 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5689 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5690 Vminibuf_scroll_window
= Qnil
;
5692 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5693 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5694 Vother_window_scroll_buffer
= Qnil
;
5696 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5697 "*Non-nil means `display-buffer' should make a separate frame.");
5700 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5701 "*Non-nil means `display-buffer' should reuse frames.\n\
5702 If the buffer in question is already displayed in a frame, raise that frame.");
5703 display_buffer_reuse_frames
= 0;
5705 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5706 "Function to call to handle automatic new frame creation.\n\
5707 It is called with no arguments and should return a newly created frame.\n\
5709 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5710 where `pop-up-frame-alist' would hold the default frame parameters.");
5711 Vpop_up_frame_function
= Qnil
;
5713 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5714 "*List of buffer names that should have their own special frames.\n\
5715 Displaying a buffer whose name is in this list makes a special frame for it\n\
5716 using `special-display-function'. See also `special-display-regexps'.\n\
5718 An element of the list can be a list instead of just a string.\n\
5719 There are two ways to use a list as an element:\n\
5720 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5721 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5722 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5723 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5724 All this is done by the function found in `special-display-function'.\n\
5726 If this variable appears \"not to work\", because you add a name to it\n\
5727 but that buffer still appears in the selected window, look at the\n\
5728 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5729 Those variables take precedence over this one.");
5730 Vspecial_display_buffer_names
= Qnil
;
5732 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5733 "*List of regexps saying which buffers should have their own special frames.\n\
5734 If a buffer name matches one of these regexps, it gets its own frame.\n\
5735 Displaying a buffer whose name is in this list makes a special frame for it\n\
5736 using `special-display-function'.\n\
5738 An element of the list can be a list instead of just a string.\n\
5739 There are two ways to use a list as an element:\n\
5740 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5741 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5742 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5743 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5744 All this is done by the function found in `special-display-function'.\n\
5746 If this variable appears \"not to work\", because you add a regexp to it\n\
5747 but the matching buffers still appear in the selected window, look at the\n\
5748 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5749 Those variables take precedence over this one.");
5750 Vspecial_display_regexps
= Qnil
;
5752 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5753 "Function to call to make a new frame for a special buffer.\n\
5754 It is called with two arguments, the buffer and optional buffer specific\n\
5755 data, and should return a window displaying that buffer.\n\
5756 The default value makes a separate frame for the buffer,\n\
5757 using `special-display-frame-alist' to specify the frame parameters.\n\
5759 A buffer is special if its is listed in `special-display-buffer-names'\n\
5760 or matches a regexp in `special-display-regexps'.");
5761 Vspecial_display_function
= Qnil
;
5763 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5764 "*List of buffer names that should appear in the selected window.\n\
5765 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5766 switches to it in the selected window, rather than making it appear\n\
5767 in some other window.\n\
5769 An element of the list can be a cons cell instead of just a string.\n\
5770 Then the car must be a string, which specifies the buffer name.\n\
5771 This is for compatibility with `special-display-buffer-names';\n\
5772 the cdr of the cons cell is ignored.\n\
5774 See also `same-window-regexps'.");
5775 Vsame_window_buffer_names
= Qnil
;
5777 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5778 "*List of regexps saying which buffers should appear in the selected window.\n\
5779 If a buffer name matches one of these regexps, then displaying it\n\
5780 using `display-buffer' or `pop-to-buffer' switches to it\n\
5781 in the selected window, rather than making it appear in some other window.\n\
5783 An element of the list can be a cons cell instead of just a string.\n\
5784 Then the car must be a string, which specifies the buffer name.\n\
5785 This is for compatibility with `special-display-buffer-names';\n\
5786 the cdr of the cons cell is ignored.\n\
5788 See also `same-window-buffer-names'.");
5789 Vsame_window_regexps
= Qnil
;
5791 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5792 "*Non-nil means display-buffer should make new windows.");
5795 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5796 "*Number of lines of continuity when scrolling by screenfuls.");
5797 next_screen_context_lines
= 2;
5799 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5800 "*display-buffer would prefer to split the largest window if this large.\n\
5801 If there is only one window, it is split regardless of this value.");
5802 split_height_threshold
= 500;
5804 DEFVAR_INT ("window-min-height", &window_min_height
,
5805 "*Delete any window less than this tall (including its mode line).");
5806 window_min_height
= 4;
5808 DEFVAR_INT ("window-min-width", &window_min_width
,
5809 "*Delete any window less than this wide.");
5810 window_min_width
= 10;
5812 DEFVAR_LISP ("scroll-preserve-screen-position",
5813 &Vscroll_preserve_screen_position
,
5814 "*Non-nil means scroll commands move point to keep its screen line unchanged.");
5815 Vscroll_preserve_screen_position
= Qnil
;
5817 DEFVAR_LISP ("window-configuration-change-hook",
5818 &Vwindow_configuration_change_hook
,
5819 "Functions to call when window configuration changes.\n\
5820 The selected frame is the one whose configuration has changed.");
5821 Vwindow_configuration_change_hook
= Qnil
;
5823 DEFVAR_BOOL ("window-size-fixed", &window_size_fixed
,
5824 "Non-nil in a buffer means windows displaying the buffer are fixed-size.\n\
5825 Emacs won't change the size of any window displaying that buffer,\n\
5826 unless you explicitly change the size, or Emacs has no other choice.\n\
5827 This variable automatically becomes buffer-local when set.");
5828 Fmake_variable_buffer_local (Qwindow_size_fixed
);
5829 window_size_fixed
= 0;
5831 defsubr (&Sselected_window
);
5832 defsubr (&Sminibuffer_window
);
5833 defsubr (&Swindow_minibuffer_p
);
5834 defsubr (&Swindowp
);
5835 defsubr (&Swindow_live_p
);
5836 defsubr (&Spos_visible_in_window_p
);
5837 defsubr (&Swindow_buffer
);
5838 defsubr (&Swindow_height
);
5839 defsubr (&Swindow_width
);
5840 defsubr (&Swindow_hscroll
);
5841 defsubr (&Sset_window_hscroll
);
5842 defsubr (&Swindow_redisplay_end_trigger
);
5843 defsubr (&Sset_window_redisplay_end_trigger
);
5844 defsubr (&Swindow_edges
);
5845 defsubr (&Scoordinates_in_window_p
);
5846 defsubr (&Swindow_at
);
5847 defsubr (&Swindow_point
);
5848 defsubr (&Swindow_start
);
5849 defsubr (&Swindow_end
);
5850 defsubr (&Sset_window_point
);
5851 defsubr (&Sset_window_start
);
5852 defsubr (&Swindow_dedicated_p
);
5853 defsubr (&Sset_window_dedicated_p
);
5854 defsubr (&Swindow_display_table
);
5855 defsubr (&Sset_window_display_table
);
5856 defsubr (&Snext_window
);
5857 defsubr (&Sprevious_window
);
5858 defsubr (&Sother_window
);
5859 defsubr (&Sget_lru_window
);
5860 defsubr (&Sget_largest_window
);
5861 defsubr (&Sget_buffer_window
);
5862 defsubr (&Sdelete_other_windows
);
5863 defsubr (&Sdelete_windows_on
);
5864 defsubr (&Sreplace_buffer_in_windows
);
5865 defsubr (&Sdelete_window
);
5866 defsubr (&Sset_window_buffer
);
5867 defsubr (&Sselect_window
);
5868 defsubr (&Sspecial_display_p
);
5869 defsubr (&Ssame_window_p
);
5870 defsubr (&Sdisplay_buffer
);
5871 defsubr (&Ssplit_window
);
5872 defsubr (&Senlarge_window
);
5873 defsubr (&Sshrink_window
);
5874 defsubr (&Sscroll_up
);
5875 defsubr (&Sscroll_down
);
5876 defsubr (&Sscroll_left
);
5877 defsubr (&Sscroll_right
);
5878 defsubr (&Sother_window_for_scrolling
);
5879 defsubr (&Sscroll_other_window
);
5880 defsubr (&Srecenter
);
5881 defsubr (&Swindow_text_height
);
5882 defsubr (&Smove_to_window_line
);
5883 defsubr (&Swindow_configuration_p
);
5884 defsubr (&Swindow_configuration_frame
);
5885 defsubr (&Sset_window_configuration
);
5886 defsubr (&Scurrent_window_configuration
);
5887 defsubr (&Ssave_window_excursion
);
5888 defsubr (&Sset_window_margins
);
5889 defsubr (&Swindow_margins
);
5890 defsubr (&Swindow_vscroll
);
5891 defsubr (&Sset_window_vscroll
);
5892 defsubr (&Scompare_window_configurations
);
5893 defsubr (&Swindow_list
);
5899 initial_define_key (control_x_map
, '1', "delete-other-windows");
5900 initial_define_key (control_x_map
, '2', "split-window");
5901 initial_define_key (control_x_map
, '0', "delete-window");
5902 initial_define_key (control_x_map
, 'o', "other-window");
5903 initial_define_key (control_x_map
, '^', "enlarge-window");
5904 initial_define_key (control_x_map
, '<', "scroll-left");
5905 initial_define_key (control_x_map
, '>', "scroll-right");
5907 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5908 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5909 initial_define_key (meta_map
, 'v', "scroll-down");
5911 initial_define_key (global_map
, Ctl('L'), "recenter");
5912 initial_define_key (meta_map
, 'r', "move-to-window-line");