1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985-1987, 1993-1998, 2000-2012
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 3 of the License, or
11 (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>. */
26 #include "character.h"
36 #include "dispextern.h"
37 #include "blockinput.h"
38 #include "intervals.h"
39 #include "termhooks.h" /* For FRAME_TERMINAL. */
43 #endif /* HAVE_X_WINDOWS */
54 Lisp_Object Qwindowp
, Qwindow_live_p
;
55 static Lisp_Object Qwindow_configuration_p
, Qrecord_window_buffer
;
56 static Lisp_Object Qwindow_deletable_p
, Qdelete_window
, Qdisplay_buffer
;
57 static Lisp_Object Qreplace_buffer_in_windows
, Qget_mru_window
;
58 static Lisp_Object Qwindow_resize_root_window
, Qwindow_resize_root_window_vertically
;
59 static Lisp_Object Qscroll_up
, Qscroll_down
, Qscroll_command
;
60 static Lisp_Object Qsafe
, Qabove
, Qbelow
;
61 static Lisp_Object Qauto_buffer_name
, Qclone_of
;
63 static int displayed_window_lines (struct window
*);
64 static struct window
*decode_window (Lisp_Object
);
65 static int count_windows (struct window
*);
66 static int get_leaf_windows (struct window
*, struct window
**, int);
67 static void window_scroll (Lisp_Object
, EMACS_INT
, int, int);
68 static void window_scroll_pixel_based (Lisp_Object
, int, int, int);
69 static void window_scroll_line_based (Lisp_Object
, int, int, int);
70 static int freeze_window_start (struct window
*, void *);
71 static Lisp_Object
window_list (void);
72 static int add_window_to_list (struct window
*, void *);
73 static int candidate_window_p (Lisp_Object
, Lisp_Object
, Lisp_Object
,
75 static Lisp_Object
next_window (Lisp_Object
, Lisp_Object
,
77 static void decode_next_window_args (Lisp_Object
*, Lisp_Object
*,
79 static void foreach_window (struct frame
*,
80 int (* fn
) (struct window
*, void *),
82 static int foreach_window_1 (struct window
*,
83 int (* fn
) (struct window
*, void *),
85 static Lisp_Object
window_list_1 (Lisp_Object
, Lisp_Object
, Lisp_Object
);
86 static int window_resize_check (struct window
*, int);
87 static void window_resize_apply (struct window
*, int);
88 static Lisp_Object
select_window (Lisp_Object
, Lisp_Object
, int);
90 /* This is the window in which the terminal's cursor should
91 be left when nothing is being done with it. This must
92 always be a leaf window, and its buffer is selected by
93 the top level editing loop at the end of each command.
95 This value is always the same as
96 FRAME_SELECTED_WINDOW (selected_frame). */
97 Lisp_Object selected_window
;
99 /* A list of all windows for use by next_window and Fwindow_list.
100 Functions creating or deleting windows should invalidate this cache
101 by setting it to nil. */
102 Lisp_Object Vwindow_list
;
104 /* The mini-buffer window of the selected frame.
105 Note that you cannot test for mini-bufferness of an arbitrary window
106 by comparing against this; but you can test for mini-bufferness of
107 the selected window. */
108 Lisp_Object minibuf_window
;
110 /* Non-nil means it is the window whose mode line should be
111 shown as the selected window when the minibuffer is selected. */
112 Lisp_Object minibuf_selected_window
;
114 /* Hook run at end of temp_output_buffer_show. */
115 static Lisp_Object Qtemp_buffer_show_hook
;
117 /* Incremented for each window created. */
118 static int sequence_number
;
120 /* Nonzero after init_window_once has finished. */
121 static int window_initialized
;
123 /* Hook to run when window config changes. */
124 static Lisp_Object Qwindow_configuration_change_hook
;
126 /* Used by the function window_scroll_pixel_based */
127 static int window_scroll_pixel_based_preserve_x
;
128 static int window_scroll_pixel_based_preserve_y
;
130 /* Same for window_scroll_line_based. */
131 static EMACS_INT window_scroll_preserve_hpos
;
132 static EMACS_INT window_scroll_preserve_vpos
;
134 static struct window
*
135 decode_window (register Lisp_Object window
)
138 return XWINDOW (selected_window
);
140 CHECK_LIVE_WINDOW (window
);
141 return XWINDOW (window
);
144 static struct window
*
145 decode_any_window (register Lisp_Object window
)
148 return XWINDOW (selected_window
);
150 CHECK_WINDOW (window
);
151 return XWINDOW (window
);
154 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
155 doc
: /* Return t if OBJECT is a window and nil otherwise. */)
158 return WINDOWP (object
) ? Qt
: Qnil
;
161 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
162 doc
: /* Return t if OBJECT is a live window and nil otherwise.
163 A live window is a window that displays a buffer.
164 Internal windows and deleted windows are not live. */)
167 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
170 /* Frames and windows. */
171 DEFUN ("window-frame", Fwindow_frame
, Swindow_frame
, 1, 1, 0,
172 doc
: /* Return the frame that window WINDOW is on.
173 If WINDOW is omitted or nil, it defaults to the selected window. */)
176 return decode_any_window (window
)->frame
;
179 DEFUN ("frame-root-window", Fframe_root_window
, Sframe_root_window
, 0, 1, 0,
180 doc
: /* Return the root window of FRAME-OR-WINDOW.
181 If omitted, FRAME-OR-WINDOW defaults to the currently selected frame.
182 With a frame argument, return that frame's root window.
183 With a window argument, return the root window of that window's frame. */)
184 (Lisp_Object frame_or_window
)
188 if (NILP (frame_or_window
))
189 window
= SELECTED_FRAME ()->root_window
;
190 else if (WINDOWP (frame_or_window
))
191 window
= XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window
)))->root_window
;
194 CHECK_LIVE_FRAME (frame_or_window
);
195 window
= XFRAME (frame_or_window
)->root_window
;
201 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
202 doc
: /* Return the minibuffer window for frame FRAME.
203 If FRAME is omitted or nil, it defaults to the selected frame. */)
207 frame
= selected_frame
;
208 CHECK_LIVE_FRAME (frame
);
209 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
212 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
,
213 Swindow_minibuffer_p
, 0, 1, 0,
214 doc
: /* Return non-nil if WINDOW is a minibuffer window.
215 If WINDOW is omitted or nil, it defaults to the selected window. */)
218 return MINI_WINDOW_P (decode_any_window (window
)) ? Qt
: Qnil
;
221 /* Don't move this to window.el - this must be a safe routine. */
222 DEFUN ("frame-first-window", Fframe_first_window
, Sframe_first_window
, 0, 1, 0,
223 doc
: /* Return the topmost, leftmost live window on FRAME-OR-WINDOW.
224 If omitted, FRAME-OR-WINDOW defaults to the currently selected frame.
225 Else if FRAME-OR-WINDOW denotes any window, return the first window of
226 that window's frame. If FRAME-OR-WINDOW denotes a live frame, return
227 the first window of that frame. */)
228 (Lisp_Object frame_or_window
)
232 if (NILP (frame_or_window
))
233 window
= SELECTED_FRAME ()->root_window
;
234 else if (WINDOWP (frame_or_window
))
235 window
= XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window
)))->root_window
;
238 CHECK_LIVE_FRAME (frame_or_window
);
239 window
= XFRAME (frame_or_window
)->root_window
;
242 while (NILP (XWINDOW (window
)->buffer
))
244 if (! NILP (XWINDOW (window
)->hchild
))
245 window
= XWINDOW (window
)->hchild
;
246 else if (! NILP (XWINDOW (window
)->vchild
))
247 window
= XWINDOW (window
)->vchild
;
255 DEFUN ("frame-selected-window", Fframe_selected_window
,
256 Sframe_selected_window
, 0, 1, 0,
257 doc
: /* Return the selected window of FRAME-OR-WINDOW.
258 If omitted, FRAME-OR-WINDOW defaults to the currently selected frame.
259 Else if FRAME-OR-WINDOW denotes any window, return the selected window
260 of that window's frame. If FRAME-OR-WINDOW denotes a live frame, return
261 the selected window of that frame. */)
262 (Lisp_Object frame_or_window
)
266 if (NILP (frame_or_window
))
267 window
= SELECTED_FRAME ()->selected_window
;
268 else if (WINDOWP (frame_or_window
))
269 window
= XFRAME (WINDOW_FRAME (XWINDOW (frame_or_window
)))->selected_window
;
272 CHECK_LIVE_FRAME (frame_or_window
);
273 window
= XFRAME (frame_or_window
)->selected_window
;
279 DEFUN ("set-frame-selected-window", Fset_frame_selected_window
,
280 Sset_frame_selected_window
, 2, 3, 0,
281 doc
: /* Set selected window of FRAME to WINDOW.
282 FRAME must be a live frame and defaults to the selected one. If FRAME
283 is the selected frame, this makes WINDOW the selected window. Optional
284 argument NORECORD non-nil means to neither change the order of recently
285 selected windows nor the buffer list. WINDOW must denote a live window.
287 (Lisp_Object frame
, Lisp_Object window
, Lisp_Object norecord
)
290 frame
= selected_frame
;
292 CHECK_LIVE_FRAME (frame
);
293 CHECK_LIVE_WINDOW (window
);
295 if (! EQ (frame
, WINDOW_FRAME (XWINDOW (window
))))
296 error ("In `set-frame-selected-window', WINDOW is not on FRAME");
298 if (EQ (frame
, selected_frame
))
299 return Fselect_window (window
, norecord
);
301 return XFRAME (frame
)->selected_window
= window
;
304 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
305 doc
: /* Return the selected window.
306 The selected window is the window in which the standard cursor for
307 selected windows appears and to which many commands apply. */)
310 return selected_window
;
313 int window_select_count
;
315 /* If select_window is called with inhibit_point_swap non-zero it will
316 not store point of the old selected window's buffer back into that
317 window's pointm slot. This is needed by Fset_window_configuration to
318 avoid that the display routine is called with selected_window set to
319 Qnil causing a subsequent crash. */
321 select_window (Lisp_Object window
, Lisp_Object norecord
, int inhibit_point_swap
)
323 register struct window
*w
;
324 register struct window
*ow
;
327 CHECK_LIVE_WINDOW (window
);
329 w
= XWINDOW (window
);
330 w
->frozen_window_start_p
= 0;
334 w
->use_time
= ++window_select_count
;
335 record_buffer (w
->buffer
);
338 if (EQ (window
, selected_window
) && !inhibit_point_swap
)
341 sf
= SELECTED_FRAME ();
342 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
344 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
345 /* Use this rather than Fhandle_switch_frame
346 so that FRAME_FOCUS_FRAME is moved appropriately as we
347 move around in the state where a minibuffer in a separate
349 Fselect_frame (WINDOW_FRAME (w
), norecord
);
350 /* Fselect_frame called us back so we've done all the work already. */
351 eassert (EQ (window
, selected_window
));
355 sf
->selected_window
= window
;
357 /* Store the current buffer's actual point into the
358 old selected window. It belongs to that window,
359 and when the window is not selected, must be in the window. */
360 if (!inhibit_point_swap
)
362 ow
= XWINDOW (selected_window
);
363 if (! NILP (ow
->buffer
))
364 set_marker_both (ow
->pointm
, ow
->buffer
,
365 BUF_PT (XBUFFER (ow
->buffer
)),
366 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
369 selected_window
= window
;
371 Fset_buffer (w
->buffer
);
373 BVAR (XBUFFER (w
->buffer
), last_selected_window
) = window
;
375 /* Go to the point recorded in the window.
376 This is important when the buffer is in more
377 than one window. It also matters when
378 redisplay_window has altered point after scrolling,
379 because it makes the change only in the window. */
381 register ptrdiff_t new_point
= marker_position (w
->pointm
);
382 if (new_point
< BEGV
)
384 else if (new_point
> ZV
)
390 windows_or_buffers_changed
++;
394 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
395 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
396 Also make WINDOW's buffer current and make WINDOW the frame's selected
397 window. Return WINDOW.
399 Optional second arg NORECORD non-nil means do not put this buffer at the
400 front of the buffer list and do not make this window the most recently
403 Note that the main editor command loop sets the current buffer to the
404 buffer of the selected window before each command. */)
405 (register Lisp_Object window
, Lisp_Object norecord
)
407 return select_window (window
, norecord
, 0);
410 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
411 doc
: /* Return the buffer displayed in window WINDOW.
412 If WINDOW is omitted or nil, it defaults to the selected window.
413 Return nil for an internal window or a deleted window. */)
416 return decode_any_window (window
)->buffer
;
419 DEFUN ("window-parent", Fwindow_parent
, Swindow_parent
, 0, 1, 0,
420 doc
: /* Return the parent window of window WINDOW.
421 If WINDOW is omitted or nil, it defaults to the selected window.
422 Return nil for a window with no parent (e.g. a root window). */)
425 return decode_any_window (window
)->parent
;
428 DEFUN ("window-top-child", Fwindow_top_child
, Swindow_top_child
, 1, 1, 0,
429 doc
: /* Return the topmost child window of window WINDOW.
430 Return nil if WINDOW is a live window (live windows have no children).
431 Return nil if WINDOW is an internal window whose children form a
432 horizontal combination. */)
435 CHECK_WINDOW (window
);
436 return decode_any_window (window
)->vchild
;
439 DEFUN ("window-left-child", Fwindow_left_child
, Swindow_left_child
, 1, 1, 0,
440 doc
: /* Return the leftmost child window of window WINDOW.
441 Return nil if WINDOW is a live window (live windows have no children).
442 Return nil if WINDOW is an internal window whose children form a
443 vertical combination. */)
446 CHECK_WINDOW (window
);
447 return decode_any_window (window
)->hchild
;
450 DEFUN ("window-next-sibling", Fwindow_next_sibling
, Swindow_next_sibling
, 0, 1, 0,
451 doc
: /* Return the next sibling window of window WINDOW.
452 If WINDOW is omitted or nil, it defaults to the selected window.
453 Return nil if WINDOW has no next sibling. */)
456 return decode_any_window (window
)->next
;
459 DEFUN ("window-prev-sibling", Fwindow_prev_sibling
, Swindow_prev_sibling
, 0, 1, 0,
460 doc
: /* Return the previous sibling window of window WINDOW.
461 If WINDOW is omitted or nil, it defaults to the selected window.
462 Return nil if WINDOW has no previous sibling. */)
465 return decode_any_window (window
)->prev
;
468 DEFUN ("window-combination-limit", Fwindow_combination_limit
, Swindow_combination_limit
, 1, 1, 0,
469 doc
: /* Return combination limit of window WINDOW.
470 If the return value is nil, child windows of WINDOW can be recombined with
471 WINDOW's siblings. A return value of t means that child windows of
472 WINDOW are never \(re-)combined with WINDOW's siblings. */)
475 return decode_any_window (window
)->combination_limit
;
478 DEFUN ("set-window-combination-limit", Fset_window_combination_limit
, Sset_window_combination_limit
, 2, 2, 0,
479 doc
: /* Set combination limit of window WINDOW to LIMIT; return LIMIT.
480 If LIMIT is nil, child windows of WINDOW can be recombined with
481 WINDOW's siblings. LIMIT t means that child windows of WINDOW are
482 never \(re-)combined with WINDOW's siblings. Other values are reserved
484 (Lisp_Object window
, Lisp_Object limit
)
486 register struct window
*w
= decode_any_window (window
);
488 w
->combination_limit
= limit
;
490 return w
->combination_limit
;
493 DEFUN ("window-use-time", Fwindow_use_time
, Swindow_use_time
, 0, 1, 0,
494 doc
: /* Return the use time of window WINDOW.
495 If WINDOW is omitted or nil, it defaults to the selected window.
496 The window with the highest use time is the most recently selected
497 one. The window with the lowest use time is the least recently
501 return make_number (decode_window (window
)->use_time
);
504 DEFUN ("window-total-height", Fwindow_total_height
, Swindow_total_height
, 0, 1, 0,
505 doc
: /* Return the total height, in lines, of window WINDOW.
506 If WINDOW is omitted or nil, it defaults to the selected window.
508 The return value includes the mode line and header line, if any.
509 If WINDOW is an internal window, the total height is the height
510 of the screen areas spanned by its children.
512 On a graphical display, this total height is reported as an
513 integer multiple of the default character height. */)
516 return decode_any_window (window
)->total_lines
;
519 DEFUN ("window-total-width", Fwindow_total_width
, Swindow_total_width
, 0, 1, 0,
520 doc
: /* Return the total width, in columns, of window WINDOW.
521 If WINDOW is omitted or nil, it defaults to the selected window.
523 The return value includes any vertical dividers or scroll bars
524 belonging to WINDOW. If WINDOW is an internal window, the total width
525 is the width of the screen areas spanned by its children.
527 On a graphical display, this total width is reported as an
528 integer multiple of the default character width. */)
531 return decode_any_window (window
)->total_cols
;
534 DEFUN ("window-new-total", Fwindow_new_total
, Swindow_new_total
, 0, 1, 0,
535 doc
: /* Return the new total size of window WINDOW.
536 If WINDOW is omitted or nil, it defaults to the selected window. */)
539 return decode_any_window (window
)->new_total
;
542 DEFUN ("window-normal-size", Fwindow_normal_size
, Swindow_normal_size
, 0, 2, 0,
543 doc
: /* Return the normal height of window WINDOW.
544 If WINDOW is omitted or nil, it defaults to the selected window.
545 If HORIZONTAL is non-nil, return the normal width of WINDOW. */)
546 (Lisp_Object window
, Lisp_Object horizontal
)
548 if (NILP (horizontal
))
549 return decode_any_window (window
)->normal_lines
;
551 return decode_any_window (window
)->normal_cols
;
554 DEFUN ("window-new-normal", Fwindow_new_normal
, Swindow_new_normal
, 0, 1, 0,
555 doc
: /* Return new normal size of window WINDOW.
556 If WINDOW is omitted or nil, it defaults to the selected window. */)
559 return decode_any_window (window
)->new_normal
;
562 DEFUN ("window-left-column", Fwindow_left_column
, Swindow_left_column
, 0, 1, 0,
563 doc
: /* Return left column of window WINDOW.
564 This is the distance, in columns, between the left edge of WINDOW and
565 the left edge of the frame's window area. For instance, the return
566 value is 0 if there is no window to the left of WINDOW.
568 If WINDOW is omitted or nil, it defaults to the selected window. */)
571 return decode_any_window (window
)->left_col
;
574 DEFUN ("window-top-line", Fwindow_top_line
, Swindow_top_line
, 0, 1, 0,
575 doc
: /* Return top line of window WINDOW.
576 This is the distance, in lines, between the top of WINDOW and the top
577 of the frame's window area. For instance, the return value is 0 if
578 there is no window above WINDOW.
580 If WINDOW is omitted or nil, it defaults to the selected window. */)
583 return decode_any_window (window
)->top_line
;
586 /* Return the number of lines of W's body. Don't count any mode or
590 window_body_lines (struct window
*w
)
592 int height
= XFASTINT (w
->total_lines
);
594 if (!MINI_WINDOW_P (w
))
596 if (WINDOW_WANTS_MODELINE_P (w
))
598 if (WINDOW_WANTS_HEADER_LINE_P (w
))
605 /* Return the number of columns of W's body. Don't count columns
606 occupied by the scroll bar or the vertical bar separating W from its
607 right sibling. On window-systems don't count fringes or display
611 window_body_cols (struct window
*w
)
613 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
614 int width
= XINT (w
->total_cols
);
616 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
617 /* Scroll bars occupy a few columns. */
618 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
619 else if (!FRAME_WINDOW_P (f
)
620 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
621 /* The column of `|' characters separating side-by-side windows
622 occupies one column only. */
625 if (FRAME_WINDOW_P (f
))
626 /* On window-systems, fringes and display margins cannot be
627 used for normal text. */
628 width
-= (WINDOW_FRINGE_COLS (w
)
629 + WINDOW_LEFT_MARGIN_COLS (w
)
630 + WINDOW_RIGHT_MARGIN_COLS (w
));
635 DEFUN ("window-body-height", Fwindow_body_height
, Swindow_body_height
, 0, 1, 0,
636 doc
: /* Return the height, in lines, of WINDOW's text area.
637 If WINDOW is omitted or nil, it defaults to the selected window.
638 Signal an error if the window is not live.
640 The returned height does not include the mode line or header line.
641 On a graphical display, the height is expressed as an integer multiple
642 of the default character height. If a line at the bottom of the text
643 area is only partially visible, that counts as a whole line; to
644 exclude partially-visible lines, use `window-text-height'. */)
647 struct window
*w
= decode_window (window
);
648 return make_number (window_body_lines (w
));
651 DEFUN ("window-body-width", Fwindow_body_width
, Swindow_body_width
, 0, 1, 0,
652 doc
: /* Return the width, in columns, of WINDOW's text area.
653 If WINDOW is omitted or nil, it defaults to the selected window.
654 Signal an error if the window is not live.
656 The return value does not include any vertical dividers, fringe or
657 marginal areas, or scroll bars. On a graphical display, the width is
658 expressed as an integer multiple of the default character width. */)
661 struct window
*w
= decode_window (window
);
662 return make_number (window_body_cols (w
));
665 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
666 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin.
667 WINDOW must be a live window and defaults to the selected one. */)
670 return make_number (decode_window (window
)->hscroll
);
673 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
674 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
675 If WINDOW is nil, the selected window is used.
676 Return NCOL. NCOL should be zero or positive.
678 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
679 window so that the location of point moves off-window. */)
680 (Lisp_Object window
, Lisp_Object ncol
)
682 struct window
*w
= decode_window (window
);
686 hscroll
= clip_to_bounds (0, XINT (ncol
), PTRDIFF_MAX
);
688 /* Prevent redisplay shortcuts when changing the hscroll. */
689 if (w
->hscroll
!= hscroll
)
690 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
692 w
->hscroll
= hscroll
;
696 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
697 Swindow_redisplay_end_trigger
, 0, 1, 0,
698 doc
: /* Return WINDOW's redisplay end trigger value.
699 WINDOW defaults to the selected window.
700 See `set-window-redisplay-end-trigger' for more information. */)
703 return decode_window (window
)->redisplay_end_trigger
;
706 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
707 Sset_window_redisplay_end_trigger
, 2, 2, 0,
708 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
709 VALUE should be a buffer position (typically a marker) or nil.
710 If it is a buffer position, then if redisplay in WINDOW reaches a position
711 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
712 with two arguments: WINDOW, and the end trigger value.
713 Afterwards the end-trigger value is reset to nil. */)
714 (register Lisp_Object window
, Lisp_Object value
)
716 register struct window
*w
;
718 w
= decode_window (window
);
719 w
->redisplay_end_trigger
= value
;
723 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
724 doc
: /* Return a list of the edge coordinates of WINDOW.
725 The list has the form (LEFT TOP RIGHT BOTTOM).
726 TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
727 all relative to 0, 0 at top left corner of frame.
729 RIGHT is one more than the rightmost column occupied by WINDOW.
730 BOTTOM is one more than the bottommost row occupied by WINDOW.
731 The edges include the space used by WINDOW's scroll bar, display
732 margins, fringes, header line, and/or mode line. For the edges of
733 just the text area, use `window-inside-edges'. */)
736 register struct window
*w
= decode_any_window (window
);
738 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
739 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
740 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
741 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
745 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
746 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
747 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
748 the top left corner of the frame.
750 RIGHT is one more than the rightmost x position occupied by WINDOW.
751 BOTTOM is one more than the bottommost y position occupied by WINDOW.
752 The pixel edges include the space used by WINDOW's scroll bar, display
753 margins, fringes, header line, and/or mode line. For the pixel edges
754 of just the text area, use `window-inside-pixel-edges'. */)
757 register struct window
*w
= decode_any_window (window
);
759 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
760 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
761 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
762 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
767 calc_absolute_offset (struct window
*w
, int *add_x
, int *add_y
)
769 struct frame
*f
= XFRAME (w
->frame
);
771 #ifdef FRAME_MENUBAR_HEIGHT
772 *add_y
+= FRAME_MENUBAR_HEIGHT (f
);
774 #ifdef FRAME_TOOLBAR_TOP_HEIGHT
775 *add_y
+= FRAME_TOOLBAR_TOP_HEIGHT (f
);
776 #elif FRAME_TOOLBAR_HEIGHT
777 *add_y
+= FRAME_TOOLBAR_HEIGHT (f
);
779 #ifdef FRAME_NS_TITLEBAR_HEIGHT
780 *add_y
+= FRAME_NS_TITLEBAR_HEIGHT (f
);
782 *add_x
= f
->left_pos
;
783 #ifdef FRAME_TOOLBAR_LEFT_WIDTH
784 *add_x
+= FRAME_TOOLBAR_LEFT_WIDTH (f
);
788 DEFUN ("window-absolute-pixel-edges", Fwindow_absolute_pixel_edges
,
789 Swindow_absolute_pixel_edges
, 0, 1, 0,
790 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
791 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
792 the top left corner of the display.
794 RIGHT is one more than the rightmost x position occupied by WINDOW.
795 BOTTOM is one more than the bottommost y position occupied by WINDOW.
796 The pixel edges include the space used by WINDOW's scroll bar, display
797 margins, fringes, header line, and/or mode line. For the pixel edges
798 of just the text area, use `window-inside-absolute-pixel-edges'. */)
801 register struct window
*w
= decode_any_window (window
);
803 calc_absolute_offset (w
, &add_x
, &add_y
);
805 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
) + add_x
),
806 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
) + add_y
),
807 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
) + add_x
),
808 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
) + add_y
),
812 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
813 doc
: /* Return a list of the edge coordinates of WINDOW.
814 The list has the form (LEFT TOP RIGHT BOTTOM).
815 TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
816 all relative to 0, 0 at top left corner of frame.
818 RIGHT is one more than the rightmost column of WINDOW's text area.
819 BOTTOM is one more than the bottommost row of WINDOW's text area.
820 The inside edges do not include the space used by the WINDOW's scroll
821 bar, display margins, fringes, header line, and/or mode line. */)
824 register struct window
*w
= decode_window (window
);
826 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
827 + WINDOW_LEFT_MARGIN_COLS (w
)
828 + WINDOW_LEFT_FRINGE_COLS (w
)),
829 make_number (WINDOW_TOP_EDGE_LINE (w
)
830 + WINDOW_HEADER_LINE_LINES (w
)),
831 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
832 - WINDOW_RIGHT_MARGIN_COLS (w
)
833 - WINDOW_RIGHT_FRINGE_COLS (w
)),
834 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
835 - WINDOW_MODE_LINE_LINES (w
)));
838 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
839 doc
: /* Return a list of the edge pixel coordinates of WINDOW's text area.
840 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to (0,0)
841 at the top left corner of the frame's window area.
843 RIGHT is one more than the rightmost x position of WINDOW's text area.
844 BOTTOM is one more than the bottommost y position of WINDOW's text area.
845 The inside edges do not include the space used by WINDOW's scroll bar,
846 display margins, fringes, header line, and/or mode line. */)
849 register struct window
*w
= decode_window (window
);
851 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
852 + WINDOW_LEFT_MARGIN_WIDTH (w
)
853 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
854 make_number (WINDOW_TOP_EDGE_Y (w
)
855 + WINDOW_HEADER_LINE_HEIGHT (w
)),
856 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
857 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
858 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
859 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
860 - WINDOW_MODE_LINE_HEIGHT (w
)));
863 DEFUN ("window-inside-absolute-pixel-edges",
864 Fwindow_inside_absolute_pixel_edges
,
865 Swindow_inside_absolute_pixel_edges
, 0, 1, 0,
866 doc
: /* Return a list of the edge pixel coordinates of WINDOW's text area.
867 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to (0,0)
868 at the top left corner of the frame's window area.
870 RIGHT is one more than the rightmost x position of WINDOW's text area.
871 BOTTOM is one more than the bottommost y position of WINDOW's text area.
872 The inside edges do not include the space used by WINDOW's scroll bar,
873 display margins, fringes, header line, and/or mode line. */)
876 register struct window
*w
= decode_window (window
);
878 calc_absolute_offset (w
, &add_x
, &add_y
);
880 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
881 + WINDOW_LEFT_MARGIN_WIDTH (w
)
882 + WINDOW_LEFT_FRINGE_WIDTH (w
) + add_x
),
883 make_number (WINDOW_TOP_EDGE_Y (w
)
884 + WINDOW_HEADER_LINE_HEIGHT (w
) + add_y
),
885 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
886 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
887 - WINDOW_RIGHT_FRINGE_WIDTH (w
) + add_x
),
888 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
889 - WINDOW_MODE_LINE_HEIGHT (w
) + add_y
));
892 /* Test if the character at column X, row Y is within window W.
893 If it is not, return ON_NOTHING;
894 if it is in the window's text area, return ON_TEXT;
895 if it is on the window's modeline, return ON_MODE_LINE;
896 if it is on the border between the window and its right sibling,
897 return ON_VERTICAL_BORDER.
898 if it is on a scroll bar, return ON_SCROLL_BAR.
899 if it is on the window's top line, return ON_HEADER_LINE;
900 if it is in left or right fringe of the window,
901 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE;
902 if it is in the marginal area to the left/right of the window,
903 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN.
905 X and Y are frame relative pixel coordinates. */
907 static enum window_part
908 coordinates_in_window (register struct window
*w
, int x
, int y
)
910 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
911 enum window_part part
;
912 int ux
= FRAME_COLUMN_WIDTH (f
);
913 int left_x
= WINDOW_LEFT_EDGE_X (w
);
914 int right_x
= WINDOW_RIGHT_EDGE_X (w
);
915 int top_y
= WINDOW_TOP_EDGE_Y (w
);
916 int bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
917 /* The width of the area where the vertical line can be dragged.
918 (Between mode lines for instance. */
919 int grabbable_width
= ux
;
920 int lmargin_width
, rmargin_width
, text_left
, text_right
;
922 /* Outside any interesting row or column? */
923 if (y
< top_y
|| y
>= bottom_y
|| x
< left_x
|| x
>= right_x
)
926 /* On the mode line or header line? */
927 if ((WINDOW_WANTS_MODELINE_P (w
)
928 && y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
929 && (part
= ON_MODE_LINE
))
930 || (WINDOW_WANTS_HEADER_LINE_P (w
)
931 && y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
932 && (part
= ON_HEADER_LINE
)))
934 /* If it's under/over the scroll bar portion of the mode/header
935 line, say it's on the vertical line. That's to be able to
936 resize windows horizontally in case we're using toolkit scroll
937 bars. Note: If scrollbars are on the left, the window that
938 must be eventually resized is that on the left of WINDOW. */
939 if ((WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
940 && !WINDOW_LEFTMOST_P (w
)
941 && eabs (x
- left_x
) < grabbable_width
)
942 || (!WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
943 && !WINDOW_RIGHTMOST_P (w
)
944 && eabs (x
- right_x
) < grabbable_width
))
945 return ON_VERTICAL_BORDER
;
950 /* In what's below, we subtract 1 when computing right_x because we
951 want the rightmost pixel, which is given by left_pixel+width-1. */
952 if (w
->pseudo_window_p
)
955 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
959 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
960 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
963 /* Outside any interesting column? */
964 if (x
< left_x
|| x
> right_x
)
965 return ON_SCROLL_BAR
;
967 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
968 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
970 text_left
= window_box_left (w
, TEXT_AREA
);
971 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
973 if (FRAME_WINDOW_P (f
))
975 if (!w
->pseudo_window_p
976 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
977 && !WINDOW_RIGHTMOST_P (w
)
978 && (eabs (x
- right_x
) < grabbable_width
))
979 return ON_VERTICAL_BORDER
;
981 /* Need to say "x > right_x" rather than >=, since on character
982 terminals, the vertical line's x coordinate is right_x. */
983 else if (!w
->pseudo_window_p
984 && !WINDOW_RIGHTMOST_P (w
)
986 return ON_VERTICAL_BORDER
;
990 if (lmargin_width
> 0
991 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
992 ? (x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
993 : (x
< left_x
+ lmargin_width
)))
994 return ON_LEFT_MARGIN
;
996 return ON_LEFT_FRINGE
;
1001 if (rmargin_width
> 0
1002 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
1003 ? (x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
1004 : (x
>= right_x
- rmargin_width
)))
1005 return ON_RIGHT_MARGIN
;
1007 return ON_RIGHT_FRINGE
;
1010 /* Everything special ruled out - must be on text area */
1014 /* Take X is the frame-relative pixel x-coordinate, and return the
1015 x-coordinate relative to part PART of window W. */
1017 window_relative_x_coord (struct window
*w
, enum window_part part
, int x
)
1019 int left_x
= (w
->pseudo_window_p
) ? 0 : WINDOW_BOX_LEFT_EDGE_X (w
);
1024 return x
- window_box_left (w
, TEXT_AREA
);
1026 case ON_LEFT_FRINGE
:
1029 case ON_RIGHT_FRINGE
:
1030 return x
- left_x
- WINDOW_LEFT_FRINGE_WIDTH (w
);
1032 case ON_LEFT_MARGIN
:
1034 - ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
1035 ? WINDOW_LEFT_FRINGE_WIDTH (w
) : 0));
1037 case ON_RIGHT_MARGIN
:
1039 - ((w
->pseudo_window_p
)
1040 ? WINDOW_TOTAL_WIDTH (w
)
1041 : WINDOW_BOX_RIGHT_EDGE_X (w
))
1042 + window_box_width (w
, RIGHT_MARGIN_AREA
)
1043 + ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
1044 ? WINDOW_RIGHT_FRINGE_WIDTH (w
) : 0));
1047 /* ON_SCROLL_BAR, ON_NOTHING, and ON_VERTICAL_BORDER: */
1052 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
1053 Scoordinates_in_window_p
, 2, 2, 0,
1054 doc
: /* Return non-nil if COORDINATES are in WINDOW.
1055 WINDOW must be a live window.
1056 COORDINATES is a cons of the form (X . Y), X and Y being distances
1057 measured in characters from the upper-left corner of the frame.
1058 \(0 . 0) denotes the character in the upper left corner of the
1060 If COORDINATES are in the text portion of WINDOW,
1061 the coordinates relative to the window are returned.
1062 If they are in the mode line of WINDOW, `mode-line' is returned.
1063 If they are in the top mode line of WINDOW, `header-line' is returned.
1064 If they are in the left fringe of WINDOW, `left-fringe' is returned.
1065 If they are in the right fringe of WINDOW, `right-fringe' is returned.
1066 If they are on the border between WINDOW and its right sibling,
1067 `vertical-line' is returned.
1068 If they are in the windows's left or right marginal areas, `left-margin'\n\
1069 or `right-margin' is returned. */)
1070 (register Lisp_Object coordinates
, Lisp_Object window
)
1077 CHECK_LIVE_WINDOW (window
);
1078 w
= XWINDOW (window
);
1079 f
= XFRAME (w
->frame
);
1080 CHECK_CONS (coordinates
);
1081 lx
= Fcar (coordinates
);
1082 ly
= Fcdr (coordinates
);
1083 CHECK_NUMBER_OR_FLOAT (lx
);
1084 CHECK_NUMBER_OR_FLOAT (ly
);
1085 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
1086 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
1088 switch (coordinates_in_window (w
, x
, y
))
1094 /* Convert X and Y to window relative pixel coordinates, and
1095 return the canonical char units. */
1096 x
-= window_box_left (w
, TEXT_AREA
);
1097 y
-= WINDOW_TOP_EDGE_Y (w
);
1098 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
1099 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
1104 case ON_VERTICAL_BORDER
:
1105 return Qvertical_line
;
1107 case ON_HEADER_LINE
:
1108 return Qheader_line
;
1110 case ON_LEFT_FRINGE
:
1111 return Qleft_fringe
;
1113 case ON_RIGHT_FRINGE
:
1114 return Qright_fringe
;
1116 case ON_LEFT_MARGIN
:
1117 return Qleft_margin
;
1119 case ON_RIGHT_MARGIN
:
1120 return Qright_margin
;
1123 /* Historically we are supposed to return nil in this case. */
1132 /* Callback for foreach_window, used in window_from_coordinates.
1133 Check if window W contains coordinates specified by USER_DATA which
1134 is actually a pointer to a struct check_window_data CW.
1136 Check if window W contains coordinates *CW->x and *CW->y. If it
1137 does, return W in *CW->window, as Lisp_Object, and return in
1138 *CW->part the part of the window under coordinates *X,*Y. Return
1139 zero from this function to stop iterating over windows. */
1141 struct check_window_data
1143 Lisp_Object
*window
;
1145 enum window_part
*part
;
1149 check_window_containing (struct window
*w
, void *user_data
)
1151 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
1152 enum window_part found
;
1155 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
1156 if (found
!= ON_NOTHING
)
1159 XSETWINDOW (*cw
->window
, w
);
1167 /* Find the window containing frame-relative pixel position X/Y and
1168 return it as a Lisp_Object.
1170 If X, Y is on one of the window's special `window_part' elements,
1171 set *PART to the id of that element.
1173 If there is no window under X, Y return nil and leave *PART
1174 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
1176 This function was previously implemented with a loop cycling over
1177 windows with Fnext_window, and starting with the frame's selected
1178 window. It turned out that this doesn't work with an
1179 implementation of next_window using Vwindow_list, because
1180 FRAME_SELECTED_WINDOW (F) is not always contained in the window
1181 tree of F when this function is called asynchronously from
1182 note_mouse_highlight. The original loop didn't terminate in this
1186 window_from_coordinates (struct frame
*f
, int x
, int y
,
1187 enum window_part
*part
, int tool_bar_p
)
1190 struct check_window_data cw
;
1191 enum window_part dummy
;
1197 cw
.window
= &window
, cw
.x
= x
, cw
.y
= y
; cw
.part
= part
;
1198 foreach_window (f
, check_window_containing
, &cw
);
1200 /* If not found above, see if it's in the tool bar window, if a tool
1204 && WINDOWP (f
->tool_bar_window
)
1205 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
1206 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), x
, y
)
1210 window
= f
->tool_bar_window
;
1216 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
1217 doc
: /* Return window containing coordinates X and Y on FRAME.
1218 FRAME must be a live frame and defaults to the selected one.
1219 The top left corner of the frame is considered to be row 0,
1221 (Lisp_Object x
, Lisp_Object y
, Lisp_Object frame
)
1226 frame
= selected_frame
;
1227 CHECK_LIVE_FRAME (frame
);
1230 /* Check that arguments are integers or floats. */
1231 CHECK_NUMBER_OR_FLOAT (x
);
1232 CHECK_NUMBER_OR_FLOAT (y
);
1234 return window_from_coordinates (f
,
1235 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
1236 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1237 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
1238 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1242 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
1243 doc
: /* Return current value of point in WINDOW.
1244 WINDOW must be a live window and defaults to the selected one.
1246 For a nonselected window, this is the value point would have
1247 if that window were selected.
1249 Note that, when WINDOW is the selected window and its buffer
1250 is also currently selected, the value returned is the same as (point).
1251 It would be more strictly correct to return the `top-level' value
1252 of point, outside of any save-excursion forms.
1253 But that is hard to define. */)
1254 (Lisp_Object window
)
1256 register struct window
*w
= decode_window (window
);
1258 if (w
== XWINDOW (selected_window
)
1259 && current_buffer
== XBUFFER (w
->buffer
))
1261 return Fmarker_position (w
->pointm
);
1264 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
1265 doc
: /* Return position at which display currently starts in WINDOW.
1266 WINDOW must be a live window and defaults to the selected one.
1267 This is updated by redisplay or by calling `set-window-start'. */)
1268 (Lisp_Object window
)
1270 return Fmarker_position (decode_window (window
)->start
);
1273 /* This is text temporarily removed from the doc string below.
1275 This function returns nil if the position is not currently known.
1276 That happens when redisplay is preempted and doesn't finish.
1277 If in that case you want to compute where the end of the window would
1278 have been if redisplay had finished, do this:
1280 (goto-char (window-start window))
1281 (vertical-motion (1- (window-height window)) window)
1284 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1285 doc
: /* Return position at which display currently ends in WINDOW.
1286 WINDOW must be a live window and defaults to the selected one.
1287 This is updated by redisplay, when it runs to completion.
1288 Simply changing the buffer text or setting `window-start'
1289 does not update this value.
1290 Return nil if there is no recorded value. (This can happen if the
1291 last redisplay of WINDOW was preempted, and did not finish.)
1292 If UPDATE is non-nil, compute the up-to-date position
1293 if it isn't already recorded. */)
1294 (Lisp_Object window
, Lisp_Object update
)
1297 struct window
*w
= decode_window (window
);
1305 #if 0 /* This change broke some things. We should make it later. */
1306 /* If we don't know the end position, return nil.
1307 The user can compute it with vertical-motion if he wants to.
1308 It would be nicer to do it automatically,
1309 but that's so slow that it would probably bother people. */
1310 if (NILP (w
->window_end_valid
))
1315 && ! (! NILP (w
->window_end_valid
)
1316 && w
->last_modified
>= BUF_MODIFF (b
)
1317 && w
->last_overlay_modified
>= BUF_OVERLAY_MODIFF (b
))
1320 struct text_pos startp
;
1322 struct buffer
*old_buffer
= NULL
;
1323 void *itdata
= NULL
;
1325 /* Cannot use Fvertical_motion because that function doesn't
1326 cope with variable-height lines. */
1327 if (b
!= current_buffer
)
1329 old_buffer
= current_buffer
;
1330 set_buffer_internal (b
);
1333 /* In case W->start is out of the range, use something
1334 reasonable. This situation occurred when loading a file with
1335 `-l' containing a call to `rmail' with subsequent other
1336 commands. At the end, W->start happened to be BEG, while
1337 rmail had already narrowed the buffer. */
1338 if (XMARKER (w
->start
)->charpos
< BEGV
)
1339 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1340 else if (XMARKER (w
->start
)->charpos
> ZV
)
1341 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1343 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1345 itdata
= bidi_shelve_cache ();
1346 start_display (&it
, w
, startp
);
1347 move_it_vertically (&it
, window_box_height (w
));
1348 if (it
.current_y
< it
.last_visible_y
)
1349 move_it_past_eol (&it
);
1350 value
= make_number (IT_CHARPOS (it
));
1351 bidi_unshelve_cache (itdata
, 0);
1354 set_buffer_internal (old_buffer
);
1357 XSETINT (value
, BUF_Z (b
) - XFASTINT (w
->window_end_pos
));
1362 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1363 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1365 (Lisp_Object window
, Lisp_Object pos
)
1367 register struct window
*w
= decode_window (window
);
1369 CHECK_NUMBER_COERCE_MARKER (pos
);
1370 if (w
== XWINDOW (selected_window
)
1371 && XBUFFER (w
->buffer
) == current_buffer
)
1374 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1376 /* We have to make sure that redisplay updates the window to show
1377 the new value of point. */
1378 if (!EQ (window
, selected_window
))
1379 ++windows_or_buffers_changed
;
1384 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1385 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1386 If WINDOW is nil, the selected window is used. Return POS.
1387 Optional third arg NOFORCE non-nil inhibits next redisplay from
1388 overriding motion of point in order to display at this exact start. */)
1389 (Lisp_Object window
, Lisp_Object pos
, Lisp_Object noforce
)
1391 register struct window
*w
= decode_window (window
);
1393 CHECK_NUMBER_COERCE_MARKER (pos
);
1394 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1395 /* this is not right, but much easier than doing what is right. */
1396 w
->start_at_line_beg
= 0;
1399 w
->update_mode_line
= 1;
1400 w
->last_modified
= 0;
1401 w
->last_overlay_modified
= 0;
1402 if (!EQ (window
, selected_window
))
1403 windows_or_buffers_changed
++;
1408 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
1409 Spos_visible_in_window_p
, 0, 3, 0,
1410 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
1411 Return nil if that position is scrolled vertically out of view.
1412 If a character is only partially visible, nil is returned, unless the
1413 optional argument PARTIALLY is non-nil.
1414 If POS is only out of view because of horizontal scrolling, return non-nil.
1415 If POS is t, it specifies the position of the last visible glyph in WINDOW.
1416 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
1418 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
1419 return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
1420 where X and Y are the pixel coordinates relative to the top left corner
1421 of the window. The remaining elements are omitted if the character after
1422 POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
1423 off-window at the top and bottom of the row, ROWH is the height of the
1424 display row, and VPOS is the row number (0-based) containing POS. */)
1425 (Lisp_Object pos
, Lisp_Object window
, Lisp_Object partially
)
1427 register struct window
*w
;
1428 register EMACS_INT posint
;
1429 register struct buffer
*buf
;
1430 struct text_pos top
;
1431 Lisp_Object in_window
= Qnil
;
1432 int rtop
, rbot
, rowh
, vpos
, fully_p
= 1;
1435 w
= decode_window (window
);
1436 buf
= XBUFFER (w
->buffer
);
1437 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
1441 else if (!NILP (pos
))
1443 CHECK_NUMBER_COERCE_MARKER (pos
);
1444 posint
= XINT (pos
);
1446 else if (w
== XWINDOW (selected_window
))
1449 posint
= XMARKER (w
->pointm
)->charpos
;
1451 /* If position is above window start or outside buffer boundaries,
1452 or if window start is out of range, position is not visible. */
1454 || (posint
>= CHARPOS (top
) && posint
<= BUF_ZV (buf
)))
1455 && CHARPOS (top
) >= BUF_BEGV (buf
)
1456 && CHARPOS (top
) <= BUF_ZV (buf
)
1457 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
)
1458 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
1461 if (!NILP (in_window
) && !NILP (partially
))
1463 Lisp_Object part
= Qnil
;
1465 part
= list4 (make_number (rtop
), make_number (rbot
),
1466 make_number (rowh
), make_number (vpos
));
1467 in_window
= Fcons (make_number (x
),
1468 Fcons (make_number (y
), part
));
1474 DEFUN ("window-line-height", Fwindow_line_height
,
1475 Swindow_line_height
, 0, 2, 0,
1476 doc
: /* Return height in pixels of text line LINE in window WINDOW.
1477 WINDOW defaults to the selected window.
1479 Return height of current line if LINE is omitted or nil. Return height of
1480 header or mode line if LINE is `header-line' or `mode-line'.
1481 Otherwise, LINE is a text line number starting from 0. A negative number
1482 counts from the end of the window.
1484 Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height
1485 in pixels of the visible part of the line, VPOS and YPOS are the
1486 vertical position in lines and pixels of the line, relative to the top
1487 of the first text line, and OFFBOT is the number of off-window pixels at
1488 the bottom of the text line. If there are off-window pixels at the top
1489 of the (first) text line, YPOS is negative.
1491 Return nil if window display is not up-to-date. In that case, use
1492 `pos-visible-in-window-p' to obtain the information. */)
1493 (Lisp_Object line
, Lisp_Object window
)
1495 register struct window
*w
;
1496 register struct buffer
*b
;
1497 struct glyph_row
*row
, *end_row
;
1501 w
= decode_window (window
);
1503 if (noninteractive
|| w
->pseudo_window_p
)
1506 CHECK_BUFFER (w
->buffer
);
1507 b
= XBUFFER (w
->buffer
);
1509 /* Fail if current matrix is not up-to-date. */
1510 if (NILP (w
->window_end_valid
)
1511 || current_buffer
->clip_changed
1512 || current_buffer
->prevent_redisplay_optimizations_p
1513 || w
->last_modified
< BUF_MODIFF (b
)
1514 || w
->last_overlay_modified
< BUF_OVERLAY_MODIFF (b
))
1520 if (i
< 0 || i
>= w
->current_matrix
->nrows
1521 || (row
= MATRIX_ROW (w
->current_matrix
, i
), !row
->enabled_p
))
1523 max_y
= window_text_bottom_y (w
);
1527 if (EQ (line
, Qheader_line
))
1529 if (!WINDOW_WANTS_HEADER_LINE_P (w
))
1531 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
1532 if (!row
->enabled_p
)
1534 return list4 (make_number (row
->height
),
1535 make_number (0), make_number (0),
1539 if (EQ (line
, Qmode_line
))
1541 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
1542 if (!row
->enabled_p
)
1544 return list4 (make_number (row
->height
),
1545 make_number (0), /* not accurate */
1546 make_number (WINDOW_HEADER_LINE_HEIGHT (w
)
1547 + window_text_bottom_y (w
)),
1551 CHECK_NUMBER (line
);
1554 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
1555 end_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
1556 max_y
= window_text_bottom_y (w
);
1559 while ((n
< 0 || i
< n
)
1560 && row
<= end_row
&& row
->enabled_p
1561 && row
->y
+ row
->height
< max_y
)
1564 if (row
> end_row
|| !row
->enabled_p
)
1576 crop
= max (0, (row
->y
+ row
->height
) - max_y
);
1577 return list4 (make_number (row
->height
+ min (0, row
->y
) - crop
),
1579 make_number (row
->y
),
1580 make_number (crop
));
1583 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1585 doc
: /* Return non-nil when WINDOW is dedicated to its buffer.
1586 More precisely, return the value assigned by the last call of
1587 `set-window-dedicated-p' for WINDOW. Return nil if that function was
1588 never called with WINDOW as its argument, or the value set by that
1589 function was internally reset since its last call. WINDOW defaults to
1590 the selected window.
1592 When a window is dedicated to its buffer, `display-buffer' will refrain
1593 from displaying another buffer in it. `get-lru-window' and
1594 `get-largest-window' treat dedicated windows specially.
1595 `delete-windows-on', `replace-buffer-in-windows', `quit-window' and
1596 `kill-buffer' can delete a dedicated window and the containing frame.
1598 Functions like `set-window-buffer' may change the buffer displayed by a
1599 window, unless that window is "strongly" dedicated to its buffer, that
1600 is the value returned by `window-dedicated-p' is t. */)
1601 (Lisp_Object window
)
1603 return decode_window (window
)->dedicated
;
1606 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1607 Sset_window_dedicated_p
, 2, 2, 0,
1608 doc
: /* Mark WINDOW as dedicated according to FLAG.
1609 WINDOW must be a live window and defaults to the selected one. FLAG
1610 non-nil means mark WINDOW as dedicated to its buffer. FLAG nil means
1611 mark WINDOW as non-dedicated. Return FLAG.
1613 When a window is dedicated to its buffer, `display-buffer' will refrain
1614 from displaying another buffer in it. `get-lru-window' and
1615 `get-largest-window' treat dedicated windows specially.
1616 `delete-windows-on', `replace-buffer-in-windows', `quit-window',
1617 `quit-restore-window' and `kill-buffer' can delete a dedicated window
1618 and the containing frame.
1620 As a special case, if FLAG is t, mark WINDOW as "strongly" dedicated to
1621 its buffer. Functions like `set-window-buffer' may change the buffer
1622 displayed by a window, unless that window is strongly dedicated to its
1623 buffer. If and when `set-window-buffer' displays another buffer in a
1624 window, it also makes sure that the window is no more dedicated. */)
1625 (Lisp_Object window
, Lisp_Object flag
)
1627 register struct window
*w
= decode_window (window
);
1629 w
->dedicated
= flag
;
1630 return w
->dedicated
;
1633 DEFUN ("window-prev-buffers", Fwindow_prev_buffers
, Swindow_prev_buffers
,
1635 doc
: /* Return buffers previously shown in WINDOW.
1636 WINDOW must be a live window and defaults to the selected one.
1638 The return value is a list of elements (BUFFER WINDOW-START POS),
1639 where BUFFER is a buffer, WINDOW-START is the start position of the
1640 window for that buffer, and POS is a window-specific point value. */)
1641 (Lisp_Object window
)
1643 return decode_window (window
)->prev_buffers
;
1646 DEFUN ("set-window-prev-buffers", Fset_window_prev_buffers
,
1647 Sset_window_prev_buffers
, 2, 2, 0,
1648 doc
: /* Set WINDOW's previous buffers to PREV-BUFFERS.
1649 WINDOW must be a live window and defaults to the selected one.
1651 PREV-BUFFERS should be a list of elements (BUFFER WINDOW-START POS),
1652 where BUFFER is a buffer, WINDOW-START is the start position of the
1653 window for that buffer, and POS is a window-specific point value. */)
1654 (Lisp_Object window
, Lisp_Object prev_buffers
)
1656 return decode_window (window
)->prev_buffers
= prev_buffers
;
1659 DEFUN ("window-next-buffers", Fwindow_next_buffers
, Swindow_next_buffers
,
1661 doc
: /* Return list of buffers recently re-shown in WINDOW.
1662 WINDOW must be a live window and defaults to the selected one. */)
1663 (Lisp_Object window
)
1665 return decode_window (window
)->next_buffers
;
1668 DEFUN ("set-window-next-buffers", Fset_window_next_buffers
,
1669 Sset_window_next_buffers
, 2, 2, 0,
1670 doc
: /* Set WINDOW's next buffers to NEXT-BUFFERS.
1671 WINDOW must be a live window and defaults to the selected one.
1672 NEXT-BUFFERS should be a list of buffers. */)
1673 (Lisp_Object window
, Lisp_Object next_buffers
)
1675 return decode_window (window
)->next_buffers
= next_buffers
;
1678 DEFUN ("window-parameters", Fwindow_parameters
, Swindow_parameters
,
1680 doc
: /* Return the parameters of WINDOW and their values.
1681 WINDOW defaults to the selected window. The return value is a list of
1682 elements of the form (PARAMETER . VALUE). */)
1683 (Lisp_Object window
)
1685 return Fcopy_alist (decode_any_window (window
)->window_parameters
);
1688 DEFUN ("window-parameter", Fwindow_parameter
, Swindow_parameter
,
1690 doc
: /* Return WINDOW's value for PARAMETER.
1691 WINDOW defaults to the selected window. */)
1692 (Lisp_Object window
, Lisp_Object parameter
)
1696 result
= Fassq (parameter
, decode_any_window (window
)->window_parameters
);
1697 return CDR_SAFE (result
);
1700 DEFUN ("set-window-parameter", Fset_window_parameter
,
1701 Sset_window_parameter
, 3, 3, 0,
1702 doc
: /* Set WINDOW's value of PARAMETER to VALUE.
1703 WINDOW defaults to the selected window. Return VALUE. */)
1704 (Lisp_Object window
, Lisp_Object parameter
, Lisp_Object value
)
1706 register struct window
*w
= decode_any_window (window
);
1707 Lisp_Object old_alist_elt
;
1709 old_alist_elt
= Fassq (parameter
, w
->window_parameters
);
1710 if (NILP (old_alist_elt
))
1711 w
->window_parameters
= Fcons (Fcons (parameter
, value
), w
->window_parameters
);
1713 Fsetcdr (old_alist_elt
, value
);
1717 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1719 doc
: /* Return the display-table that WINDOW is using.
1720 WINDOW defaults to the selected window. */)
1721 (Lisp_Object window
)
1723 return decode_window (window
)->display_table
;
1726 /* Get the display table for use on window W. This is either W's
1727 display table or W's buffer's display table. Ignore the specified
1728 tables if they are not valid; if no valid table is specified,
1731 struct Lisp_Char_Table
*
1732 window_display_table (struct window
*w
)
1734 struct Lisp_Char_Table
*dp
= NULL
;
1736 if (DISP_TABLE_P (w
->display_table
))
1737 dp
= XCHAR_TABLE (w
->display_table
);
1738 else if (BUFFERP (w
->buffer
))
1740 struct buffer
*b
= XBUFFER (w
->buffer
);
1742 if (DISP_TABLE_P (BVAR (b
, display_table
)))
1743 dp
= XCHAR_TABLE (BVAR (b
, display_table
));
1744 else if (DISP_TABLE_P (Vstandard_display_table
))
1745 dp
= XCHAR_TABLE (Vstandard_display_table
);
1751 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1752 doc
: /* Set WINDOW's display-table to TABLE. */)
1753 (register Lisp_Object window
, Lisp_Object table
)
1755 register struct window
*w
;
1757 w
= decode_window (window
);
1758 w
->display_table
= table
;
1762 /* Record info on buffer window W is displaying
1763 when it is about to cease to display that buffer. */
1765 unshow_buffer (register struct window
*w
)
1772 if (b
!= XMARKER (w
->pointm
)->buffer
)
1776 if (w
== XWINDOW (selected_window
)
1777 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1778 /* Do this except when the selected window's buffer
1779 is being removed from some other window. */
1781 /* last_window_start records the start position that this buffer
1782 had in the last window to be disconnected from it.
1783 Now that this statement is unconditional,
1784 it is possible for the buffer to be displayed in the
1785 selected window, while last_window_start reflects another
1786 window which was recently showing the same buffer.
1787 Some people might say that might be a good thing. Let's see. */
1788 b
->last_window_start
= marker_position (w
->start
);
1790 /* Point in the selected window's buffer
1791 is actually stored in that buffer, and the window's pointm isn't used.
1792 So don't clobber point in that buffer. */
1793 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1794 /* This line helps to fix Horsley's testbug.el bug. */
1795 && !(WINDOWP (BVAR (b
, last_selected_window
))
1796 && w
!= XWINDOW (BVAR (b
, last_selected_window
))
1797 && EQ (buf
, XWINDOW (BVAR (b
, last_selected_window
))->buffer
)))
1798 temp_set_point_both (b
,
1799 clip_to_bounds (BUF_BEGV (b
),
1800 XMARKER (w
->pointm
)->charpos
,
1802 clip_to_bounds (BUF_BEGV_BYTE (b
),
1803 marker_byte_position (w
->pointm
),
1806 if (WINDOWP (BVAR (b
, last_selected_window
))
1807 && w
== XWINDOW (BVAR (b
, last_selected_window
)))
1808 BVAR (b
, last_selected_window
) = Qnil
;
1811 /* Put NEW into the window structure in place of OLD. SETFLAG zero
1812 means change window structure only. Otherwise store geometry and
1813 other settings as well. */
1815 replace_window (Lisp_Object old
, Lisp_Object
new, int setflag
)
1817 register Lisp_Object tem
;
1818 register struct window
*o
= XWINDOW (old
), *n
= XWINDOW (new);
1820 /* If OLD is its frame's root window, then NEW is the new
1821 root window for that frame. */
1822 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1823 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = new;
1827 n
->left_col
= o
->left_col
;
1828 n
->top_line
= o
->top_line
;
1829 n
->total_cols
= o
->total_cols
;
1830 n
->total_lines
= o
->total_lines
;
1831 n
->normal_cols
= o
->normal_cols
;
1832 o
->normal_cols
= make_float (1.0);
1833 n
->normal_lines
= o
->normal_lines
;
1834 o
->normal_lines
= make_float (1.0);
1835 n
->desired_matrix
= n
->current_matrix
= 0;
1837 memset (&n
->cursor
, 0, sizeof (n
->cursor
));
1838 memset (&n
->last_cursor
, 0, sizeof (n
->last_cursor
));
1839 memset (&n
->phys_cursor
, 0, sizeof (n
->phys_cursor
));
1840 n
->phys_cursor_type
= -1;
1841 n
->phys_cursor_width
= -1;
1842 n
->must_be_updated_p
= 0;
1843 n
->pseudo_window_p
= 0;
1844 XSETFASTINT (n
->window_end_vpos
, 0);
1845 XSETFASTINT (n
->window_end_pos
, 0);
1846 n
->window_end_valid
= Qnil
;
1847 n
->frozen_window_start_p
= 0;
1850 n
->next
= tem
= o
->next
;
1852 XWINDOW (tem
)->prev
= new;
1854 n
->prev
= tem
= o
->prev
;
1856 XWINDOW (tem
)->next
= new;
1858 n
->parent
= tem
= o
->parent
;
1861 if (EQ (XWINDOW (tem
)->vchild
, old
))
1862 XWINDOW (tem
)->vchild
= new;
1863 if (EQ (XWINDOW (tem
)->hchild
, old
))
1864 XWINDOW (tem
)->hchild
= new;
1868 /* If window WINDOW and its parent window are iso-combined, merge
1869 WINDOW's children into those of its parent window and mark WINDOW as
1873 recombine_windows (Lisp_Object window
)
1875 struct window
*w
, *p
, *c
;
1876 Lisp_Object parent
, child
;
1879 w
= XWINDOW (window
);
1881 if (!NILP (parent
) && NILP (w
->combination_limit
))
1883 p
= XWINDOW (parent
);
1884 if (((!NILP (p
->vchild
) && !NILP (w
->vchild
))
1885 || (!NILP (p
->hchild
) && !NILP (w
->hchild
))))
1886 /* WINDOW and PARENT are both either a vertical or a horizontal
1889 horflag
= NILP (w
->vchild
);
1890 child
= horflag
? w
->hchild
: w
->vchild
;
1891 c
= XWINDOW (child
);
1893 /* Splice WINDOW's children into its parent's children and
1894 assign new normal sizes. */
1903 XWINDOW (w
->prev
)->next
= child
;
1912 = make_float (XFLOATINT (c
->total_cols
)
1913 / XFLOATINT (p
->total_cols
));
1916 = make_float (XFLOATINT (c
->total_lines
)
1917 / XFLOATINT (p
->total_lines
));
1921 if (!NILP (w
->next
))
1924 XWINDOW (c
->next
)->prev
= child
;
1932 c
= XWINDOW (child
);
1936 /* WINDOW can be deleted now. */
1937 w
->vchild
= w
->hchild
= Qnil
;
1942 /* If WINDOW can be deleted, delete it. */
1944 delete_deletable_window (Lisp_Object window
)
1946 if (!NILP (call1 (Qwindow_deletable_p
, window
)))
1947 call1 (Qdelete_window
, window
);
1950 /***********************************************************************
1952 ***********************************************************************/
1954 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1955 pointer. This is a callback function for foreach_window, used in
1956 the window_list function. */
1959 add_window_to_list (struct window
*w
, void *user_data
)
1961 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1963 XSETWINDOW (window
, w
);
1964 *list
= Fcons (window
, *list
);
1969 /* Return a list of all windows, for use by next_window. If
1970 Vwindow_list is a list, return that list. Otherwise, build a new
1971 list, cache it in Vwindow_list, and return that. */
1976 if (!CONSP (Vwindow_list
))
1980 Vwindow_list
= Qnil
;
1981 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1983 Lisp_Object args
[2];
1985 /* We are visiting windows in canonical order, and add
1986 new windows at the front of args[1], which means we
1987 have to reverse this list at the end. */
1989 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1990 args
[0] = Vwindow_list
;
1991 args
[1] = Fnreverse (args
[1]);
1992 Vwindow_list
= Fnconc (2, args
);
1996 return Vwindow_list
;
2000 /* Value is non-zero if WINDOW satisfies the constraints given by
2001 OWINDOW, MINIBUF and ALL_FRAMES.
2003 MINIBUF t means WINDOW may be minibuffer windows.
2004 `lambda' means WINDOW may not be a minibuffer window.
2005 a window means a specific minibuffer window
2007 ALL_FRAMES t means search all frames,
2008 nil means search just current frame,
2009 `visible' means search just visible frames on the
2011 0 means search visible and iconified frames on the
2013 a window means search the frame that window belongs to,
2014 a frame means consider windows on that frame, only. */
2017 candidate_window_p (Lisp_Object window
, Lisp_Object owindow
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2019 struct window
*w
= XWINDOW (window
);
2020 struct frame
*f
= XFRAME (w
->frame
);
2021 int candidate_p
= 1;
2023 if (!BUFFERP (w
->buffer
))
2025 else if (MINI_WINDOW_P (w
)
2026 && (EQ (minibuf
, Qlambda
)
2027 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
2029 /* If MINIBUF is `lambda' don't consider any mini-windows.
2030 If it is a window, consider only that one. */
2033 else if (EQ (all_frames
, Qt
))
2035 else if (NILP (all_frames
))
2037 eassert (WINDOWP (owindow
));
2038 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
2040 else if (EQ (all_frames
, Qvisible
))
2042 FRAME_SAMPLE_VISIBILITY (f
);
2043 candidate_p
= FRAME_VISIBLE_P (f
)
2044 && (FRAME_TERMINAL (XFRAME (w
->frame
))
2045 == FRAME_TERMINAL (XFRAME (selected_frame
)));
2048 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
2050 FRAME_SAMPLE_VISIBILITY (f
);
2051 candidate_p
= (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
)
2052 #ifdef HAVE_X_WINDOWS
2053 /* Yuck!! If we've just created the frame and the
2054 window-manager requested the user to place it
2055 manually, the window may still not be considered
2056 `visible'. I'd argue it should be at least
2057 something like `iconified', but don't know how to do
2059 || (FRAME_X_P (f
) && f
->output_data
.x
->asked_for_visible
2060 && !f
->output_data
.x
->has_been_visible
)
2063 && (FRAME_TERMINAL (XFRAME (w
->frame
))
2064 == FRAME_TERMINAL (XFRAME (selected_frame
)));
2066 else if (WINDOWP (all_frames
))
2067 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
2068 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
2069 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
2070 else if (FRAMEP (all_frames
))
2071 candidate_p
= EQ (all_frames
, w
->frame
);
2077 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
2078 Fwindow_list. See candidate_window_p for the meaning of WINDOW,
2079 MINIBUF, and ALL_FRAMES. */
2082 decode_next_window_args (Lisp_Object
*window
, Lisp_Object
*minibuf
, Lisp_Object
*all_frames
)
2085 *window
= selected_window
;
2087 CHECK_LIVE_WINDOW (*window
);
2089 /* MINIBUF nil may or may not include minibuffers. Decide if it
2091 if (NILP (*minibuf
))
2092 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
2093 else if (!EQ (*minibuf
, Qt
))
2096 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
2097 => count none of them, or a specific minibuffer window (the
2098 active one) to count. */
2100 /* ALL_FRAMES nil doesn't specify which frames to include. */
2101 if (NILP (*all_frames
))
2102 *all_frames
= (!EQ (*minibuf
, Qlambda
)
2103 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
2105 else if (EQ (*all_frames
, Qvisible
))
2107 else if (EQ (*all_frames
, make_number (0)))
2109 else if (FRAMEP (*all_frames
))
2111 else if (!EQ (*all_frames
, Qt
))
2116 /* Return the next or previous window of WINDOW in cyclic ordering
2117 of windows. NEXT_P non-zero means return the next window. See the
2118 documentation string of next-window for the meaning of MINIBUF and
2122 next_window (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
, int next_p
)
2124 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2126 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
2127 return the first window on the frame. */
2128 if (FRAMEP (all_frames
)
2129 && !EQ (all_frames
, XWINDOW (window
)->frame
))
2130 return Fframe_first_window (all_frames
);
2136 /* Find WINDOW in the list of all windows. */
2137 list
= Fmemq (window
, window_list ());
2139 /* Scan forward from WINDOW to the end of the window list. */
2141 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
2142 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
2145 /* Scan from the start of the window list up to WINDOW. */
2147 for (list
= Vwindow_list
;
2148 CONSP (list
) && !EQ (XCAR (list
), window
);
2150 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
2154 window
= XCAR (list
);
2158 Lisp_Object candidate
, list
;
2160 /* Scan through the list of windows for candidates. If there are
2161 candidate windows in front of WINDOW, the last one of these
2162 is the one we want. If there are candidates following WINDOW
2163 in the list, again the last one of these is the one we want. */
2165 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
2167 if (EQ (XCAR (list
), window
))
2169 if (WINDOWP (candidate
))
2172 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
2174 candidate
= XCAR (list
);
2177 if (WINDOWP (candidate
))
2185 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
2186 doc
: /* Return live window after WINDOW in the cyclic ordering of windows.
2187 WINDOW must be a live window and defaults to the selected one. The
2188 optional arguments MINIBUF and ALL-FRAMES specify the set of windows to
2191 MINIBUF nil or omitted means consider the minibuffer window only if the
2192 minibuffer is active. MINIBUF t means consider the minibuffer window
2193 even if the minibuffer is not active. Any other value means do not
2194 consider the minibuffer window even if the minibuffer is active.
2196 ALL-FRAMES nil or omitted means consider all windows on WINDOW's frame,
2197 plus the minibuffer window if specified by the MINIBUF argument. If the
2198 minibuffer counts, consider all windows on all frames that share that
2199 minibuffer too. The following non-nil values of ALL-FRAMES have special
2202 - t means consider all windows on all existing frames.
2204 - `visible' means consider all windows on all visible frames.
2206 - 0 (the number zero) means consider all windows on all visible and
2209 - A frame means consider all windows on that frame only.
2211 Anything else means consider all windows on WINDOW's frame and no
2214 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
2215 `next-window' to iterate through the entire cycle of acceptable
2216 windows, eventually ending up back at the window you started with.
2217 `previous-window' traverses the same cycle, in the reverse order. */)
2218 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2220 return next_window (window
, minibuf
, all_frames
, 1);
2224 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
2225 doc
: /* Return live window before WINDOW in the cyclic ordering of windows.
2226 WINDOW must be a live window and defaults to the selected one. The
2227 optional arguments MINIBUF and ALL-FRAMES specify the set of windows to
2230 MINIBUF nil or omitted means consider the minibuffer window only if the
2231 minibuffer is active. MINIBUF t means consider the minibuffer window
2232 even if the minibuffer is not active. Any other value means do not
2233 consider the minibuffer window even if the minibuffer is active.
2235 ALL-FRAMES nil or omitted means consider all windows on WINDOW's frame,
2236 plus the minibuffer window if specified by the MINIBUF argument. If the
2237 minibuffer counts, consider all windows on all frames that share that
2238 minibuffer too. The following non-nil values of ALL-FRAMES have special
2241 - t means consider all windows on all existing frames.
2243 - `visible' means consider all windows on all visible frames.
2245 - 0 (the number zero) means consider all windows on all visible and
2248 - A frame means consider all windows on that frame only.
2250 Anything else means consider all windows on WINDOW's frame and no
2253 If you use consistent values for MINIBUF and ALL-FRAMES, you can
2254 use `previous-window' to iterate through the entire cycle of
2255 acceptable windows, eventually ending up back at the window you
2256 started with. `next-window' traverses the same cycle, in the
2258 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2260 return next_window (window
, minibuf
, all_frames
, 0);
2264 /* Return a list of windows in cyclic ordering. Arguments are like
2265 for `next-window'. */
2268 window_list_1 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2270 Lisp_Object tail
, list
, rest
;
2272 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2275 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
2276 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
2277 list
= Fcons (XCAR (tail
), list
);
2279 /* Rotate the list to start with WINDOW. */
2280 list
= Fnreverse (list
);
2281 rest
= Fmemq (window
, list
);
2282 if (!NILP (rest
) && !EQ (rest
, list
))
2284 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
2286 XSETCDR (tail
, Qnil
);
2287 list
= nconc2 (rest
, list
);
2293 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
2294 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
2295 FRAME nil or omitted means use the selected frame.
2296 WINDOW nil or omitted means use the window selected within FRAME.
2297 MINIBUF t means include the minibuffer window, even if it isn't active.
2298 MINIBUF nil or omitted means include the minibuffer window only
2300 MINIBUF neither nil nor t means never include the minibuffer window. */)
2301 (Lisp_Object frame
, Lisp_Object minibuf
, Lisp_Object window
)
2304 window
= FRAMEP (frame
) ? XFRAME (frame
)->selected_window
: selected_window
;
2305 CHECK_WINDOW (window
);
2307 frame
= selected_frame
;
2309 if (!EQ (frame
, XWINDOW (window
)->frame
))
2310 error ("Window is on a different frame");
2312 return window_list_1 (window
, minibuf
, frame
);
2316 DEFUN ("window-list-1", Fwindow_list_1
, Swindow_list_1
, 0, 3, 0,
2317 doc
: /* Return a list of all live windows.
2318 WINDOW specifies the first window to list and defaults to the selected
2321 Optional argument MINIBUF nil or omitted means consider the minibuffer
2322 window only if the minibuffer is active. MINIBUF t means consider the
2323 minibuffer window even if the minibuffer is not active. Any other value
2324 means do not consider the minibuffer window even if the minibuffer is
2327 Optional argument ALL-FRAMES nil or omitted means consider all windows
2328 on WINDOW's frame, plus the minibuffer window if specified by the
2329 MINIBUF argument. If the minibuffer counts, consider all windows on all
2330 frames that share that minibuffer too. The following non-nil values of
2331 ALL-FRAMES have special meanings:
2333 - t means consider all windows on all existing frames.
2335 - `visible' means consider all windows on all visible frames.
2337 - 0 (the number zero) means consider all windows on all visible and
2340 - A frame means consider all windows on that frame only.
2342 Anything else means consider all windows on WINDOW's frame and no
2345 If WINDOW is not on the list of windows returned, some other window will
2346 be listed first but no error is signaled. */)
2347 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2349 return window_list_1 (window
, minibuf
, all_frames
);
2352 /* Look at all windows, performing an operation specified by TYPE
2354 If FRAMES is Qt, look at all frames;
2355 Qnil, look at just the selected frame;
2356 Qvisible, look at visible frames;
2357 a frame, just look at windows on that frame.
2358 If MINI is non-zero, perform the operation on minibuffer windows too. */
2363 GET_BUFFER_WINDOW
, /* Arg is buffer */
2364 REPLACE_BUFFER_IN_WINDOWS_SAFELY
, /* Arg is buffer */
2365 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
2370 window_loop (enum window_loop type
, Lisp_Object obj
, int mini
, Lisp_Object frames
)
2372 Lisp_Object window
, windows
, best_window
, frame_arg
;
2373 int frame_best_window_flag
= 0;
2375 struct gcpro gcpro1
;
2377 /* If we're only looping through windows on a particular frame,
2378 frame points to that frame. If we're looping through windows
2379 on all frames, frame is 0. */
2380 if (FRAMEP (frames
))
2381 f
= XFRAME (frames
);
2382 else if (NILP (frames
))
2383 f
= SELECTED_FRAME ();
2388 frame_arg
= Qlambda
;
2389 else if (EQ (frames
, make_number (0)))
2391 else if (EQ (frames
, Qvisible
))
2396 /* frame_arg is Qlambda to stick to one frame,
2397 Qvisible to consider all visible frames,
2400 /* Pick a window to start with. */
2404 window
= FRAME_SELECTED_WINDOW (f
);
2406 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
2408 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
2412 for (; CONSP (windows
); windows
= XCDR (windows
))
2416 window
= XCAR (windows
);
2417 w
= XWINDOW (window
);
2419 /* Note that we do not pay attention here to whether the frame
2420 is visible, since Fwindow_list skips non-visible frames if
2421 that is desired, under the control of frame_arg. */
2422 if (!MINI_WINDOW_P (w
)
2423 /* For REPLACE_BUFFER_IN_WINDOWS_SAFELY, we must always
2424 consider all windows. */
2425 || type
== REPLACE_BUFFER_IN_WINDOWS_SAFELY
2426 || (mini
&& minibuf_level
> 0))
2429 case GET_BUFFER_WINDOW
:
2430 if (EQ (w
->buffer
, obj
)
2431 /* Don't find any minibuffer window except the one that
2432 is currently in use. */
2433 && (MINI_WINDOW_P (w
) ? EQ (window
, minibuf_window
) : 1))
2435 if (EQ (window
, selected_window
))
2436 /* Preferably return the selected window. */
2437 RETURN_UNGCPRO (window
);
2438 else if (EQ (XWINDOW (window
)->frame
, selected_frame
)
2439 && !frame_best_window_flag
)
2440 /* Prefer windows on the current frame (but don't
2441 choose another one if we have one already). */
2443 best_window
= window
;
2444 frame_best_window_flag
= 1;
2446 else if (NILP (best_window
))
2447 best_window
= window
;
2451 case REPLACE_BUFFER_IN_WINDOWS_SAFELY
:
2452 /* We could simply check whether the buffer shown by window
2453 is live, and show another buffer in case it isn't. */
2454 if (EQ (w
->buffer
, obj
))
2456 /* Undedicate WINDOW. */
2457 w
->dedicated
= Qnil
;
2458 /* Make WINDOW show the buffer returned by
2459 other_buffer_safely, don't run any hooks. */
2461 (window
, other_buffer_safely (w
->buffer
), 0, 0);
2462 /* If WINDOW is the selected window, make its buffer
2463 current. But do so only if the window shows the
2464 current buffer (Bug#6454). */
2465 if (EQ (window
, selected_window
)
2466 && XBUFFER (w
->buffer
) == current_buffer
)
2467 Fset_buffer (w
->buffer
);
2471 case REDISPLAY_BUFFER_WINDOWS
:
2472 if (EQ (w
->buffer
, obj
))
2474 mark_window_display_accurate (window
, 0);
2475 w
->update_mode_line
= 1;
2476 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2477 ++update_mode_lines
;
2478 best_window
= window
;
2482 /* Check for a window that has a killed buffer. */
2483 case CHECK_ALL_WINDOWS
:
2484 if (! NILP (w
->buffer
)
2485 && NILP (BVAR (XBUFFER (w
->buffer
), name
)))
2489 case WINDOW_LOOP_UNUSED
:
2498 /* Used for debugging. Abort if any window has a dead buffer. */
2500 extern void check_all_windows (void) EXTERNALLY_VISIBLE
;
2502 check_all_windows (void)
2504 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2507 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 0, 2, 0,
2508 doc
: /* Return a window currently displaying BUFFER-OR-NAME, or nil if none.
2509 BUFFER-OR-NAME may be a buffer or a buffer name and defaults to
2512 The optional argument ALL-FRAMES specifies the frames to consider:
2514 - t means consider all windows on all existing frames.
2516 - `visible' means consider all windows on all visible frames.
2518 - 0 (the number zero) means consider all windows on all visible
2519 and iconified frames.
2521 - A frame means consider all windows on that frame only.
2523 Any other value of ALL-FRAMES means consider all windows on the
2524 selected frame and no others. */)
2525 (Lisp_Object buffer_or_name
, Lisp_Object all_frames
)
2529 if (NILP (buffer_or_name
))
2530 buffer
= Fcurrent_buffer ();
2532 buffer
= Fget_buffer (buffer_or_name
);
2534 if (BUFFERP (buffer
))
2535 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, all_frames
);
2541 resize_root_window (Lisp_Object window
, Lisp_Object delta
, Lisp_Object horizontal
, Lisp_Object ignore
)
2543 return call4 (Qwindow_resize_root_window
, window
, delta
, horizontal
, ignore
);
2547 DEFUN ("delete-other-windows-internal", Fdelete_other_windows_internal
,
2548 Sdelete_other_windows_internal
, 0, 2, "",
2549 doc
: /* Make WINDOW fill its frame.
2550 Only the frame WINDOW is on is affected. WINDOW may be any window and
2551 defaults to the selected one.
2553 Optional argument ROOT, if non-nil, must specify an internal window such
2554 that WINDOW is in its window subtree. If this is the case, replace ROOT
2555 by WINDOW and leave alone any windows not part of ROOT's subtree.
2557 When WINDOW is live try to reduce display jumps by keeping the text
2558 previously visible in WINDOW in the same place on the frame. Doing this
2559 depends on the value of (window-start WINDOW), so if calling this
2560 function in a program gives strange scrolling, make sure the
2561 window-start value is reasonable when this function is called. */)
2562 (Lisp_Object window
, Lisp_Object root
)
2564 struct window
*w
, *r
, *s
;
2566 Lisp_Object sibling
, pwindow
, swindow
IF_LINT (= Qnil
), delta
;
2567 ptrdiff_t startpos
IF_LINT (= 0);
2568 int top
IF_LINT (= 0), new_top
, resize_failed
;
2570 w
= decode_any_window (window
);
2571 XSETWINDOW (window
, w
);
2572 f
= XFRAME (w
->frame
);
2575 /* ROOT is the frame's root window. */
2577 root
= FRAME_ROOT_WINDOW (f
);
2581 /* ROOT must be an ancestor of WINDOW. */
2583 r
= decode_any_window (root
);
2584 pwindow
= XWINDOW (window
)->parent
;
2585 while (!NILP (pwindow
))
2586 if (EQ (pwindow
, root
))
2589 pwindow
= XWINDOW (pwindow
)->parent
;
2590 if (!EQ (pwindow
, root
))
2591 error ("Specified root is not an ancestor of specified window");
2594 if (EQ (window
, root
))
2597 /* I don't understand the "top > 0" part below. If we deal with a
2598 standalone minibuffer it would have been caught by the preceding
2600 else if (MINI_WINDOW_P (w
)) /* && top > 0) */
2601 error ("Can't expand minibuffer to full frame");
2603 if (!NILP (w
->buffer
))
2605 startpos
= marker_position (w
->start
);
2606 top
= WINDOW_TOP_EDGE_LINE (w
)
2607 - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2608 /* Make sure WINDOW is the frame's selected window. */
2609 if (!EQ (window
, FRAME_SELECTED_WINDOW (f
)))
2611 if (EQ (selected_frame
, w
->frame
))
2612 Fselect_window (window
, Qnil
);
2614 FRAME_SELECTED_WINDOW (f
) = window
;
2619 /* See if the frame's selected window is a part of the window
2620 subtree rooted at WINDOW, by finding all the selected window's
2621 parents and comparing each one with WINDOW. If it isn't we
2622 need a new selected window for this frame. */
2623 swindow
= FRAME_SELECTED_WINDOW (f
);
2627 while (!NILP (pwindow
) && !EQ (window
, pwindow
))
2628 pwindow
= XWINDOW (pwindow
)->parent
;
2630 if (EQ (window
, pwindow
))
2631 /* If WINDOW is an ancestor of SWINDOW, then SWINDOW is ok
2632 as the new selected window. */
2635 /* Else try the previous window of SWINDOW. */
2636 swindow
= Fprevious_window (swindow
, Qlambda
, Qnil
);
2639 if (!EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
2641 if (EQ (selected_frame
, w
->frame
))
2642 Fselect_window (swindow
, Qnil
);
2644 FRAME_SELECTED_WINDOW (f
) = swindow
;
2649 if (!FRAME_INITIAL_P (f
))
2651 Mouse_HLInfo
*hlinfo
= MOUSE_HL_INFO (f
);
2653 /* We are going to free the glyph matrices of WINDOW, and with
2654 that we might lose any information about glyph rows that have
2655 some of their glyphs highlighted in mouse face. (These rows
2656 are marked with a non-zero mouse_face_p flag.) If WINDOW
2657 indeed has some glyphs highlighted in mouse face, signal to
2658 frame's up-to-date hook that mouse highlight was overwritten,
2659 so that it will arrange for redisplaying the highlight. */
2660 if (EQ (hlinfo
->mouse_face_window
, window
))
2662 hlinfo
->mouse_face_beg_row
= hlinfo
->mouse_face_beg_col
= -1;
2663 hlinfo
->mouse_face_end_row
= hlinfo
->mouse_face_end_col
= -1;
2664 hlinfo
->mouse_face_window
= Qnil
;
2667 free_window_matrices (r
);
2669 windows_or_buffers_changed
++;
2670 Vwindow_list
= Qnil
;
2671 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
2674 if (NILP (w
->buffer
))
2676 /* Resize child windows vertically. */
2677 XSETINT (delta
, XINT (r
->total_lines
) - XINT (w
->total_lines
));
2678 w
->top_line
= r
->top_line
;
2679 resize_root_window (window
, delta
, Qnil
, Qnil
);
2680 if (window_resize_check (w
, 0))
2681 window_resize_apply (w
, 0);
2684 resize_root_window (window
, delta
, Qnil
, Qt
);
2685 if (window_resize_check (w
, 0))
2686 window_resize_apply (w
, 0);
2691 /* Resize child windows horizontally. */
2694 w
->left_col
= r
->left_col
;
2695 XSETINT (delta
, XINT (r
->total_cols
) - XINT (w
->total_cols
));
2696 w
->left_col
= r
->left_col
;
2697 resize_root_window (window
, delta
, Qt
, Qnil
);
2698 if (window_resize_check (w
, 1))
2699 window_resize_apply (w
, 1);
2702 resize_root_window (window
, delta
, Qt
, Qt
);
2703 if (window_resize_check (w
, 1))
2704 window_resize_apply (w
, 1);
2711 /* Play safe, if we still can ... */
2714 w
= XWINDOW (window
);
2718 /* Cleanly unlink WINDOW from window-tree. */
2719 if (!NILP (w
->prev
))
2720 /* Get SIBLING above (on the left of) WINDOW. */
2723 s
= XWINDOW (sibling
);
2725 if (!NILP (s
->next
))
2726 XWINDOW (s
->next
)->prev
= sibling
;
2729 /* Get SIBLING below (on the right of) WINDOW. */
2732 s
= XWINDOW (sibling
);
2734 if (!NILP (XWINDOW (w
->parent
)->vchild
))
2735 XWINDOW (w
->parent
)->vchild
= sibling
;
2737 XWINDOW (w
->parent
)->hchild
= sibling
;
2740 /* Delete ROOT and all child windows of ROOT. */
2741 if (!NILP (r
->vchild
))
2743 delete_all_child_windows (r
->vchild
);
2746 else if (!NILP (r
->hchild
))
2748 delete_all_child_windows (r
->hchild
);
2752 replace_window (root
, window
, 1);
2754 /* This must become SWINDOW anyway ....... */
2755 if (!NILP (w
->buffer
) && !resize_failed
)
2757 /* Try to minimize scrolling, by setting the window start to the
2758 point will cause the text at the old window start to be at the
2759 same place on the frame. But don't try to do this if the
2760 window start is outside the visible portion (as might happen
2761 when the display is not current, due to typeahead). */
2762 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2764 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2765 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2767 struct position pos
;
2768 struct buffer
*obuf
= current_buffer
;
2770 Fset_buffer (w
->buffer
);
2771 /* This computation used to temporarily move point, but that
2772 can have unwanted side effects due to text properties. */
2773 pos
= *vmotion (startpos
, -top
, w
);
2775 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2776 w
->window_end_valid
= Qnil
;
2777 w
->start_at_line_beg
= (pos
.bytepos
== BEGV_BYTE
2778 || FETCH_BYTE (pos
.bytepos
- 1) == '\n');
2779 /* We need to do this, so that the window-scroll-functions
2781 w
->optional_new_start
= 1;
2783 set_buffer_internal (obuf
);
2790 run_window_configuration_change_hook (f
);
2797 replace_buffer_in_windows (Lisp_Object buffer
)
2799 call1 (Qreplace_buffer_in_windows
, buffer
);
2803 /* Safely replace BUFFER with some other buffer in all windows of all
2804 frames, even those on other keyboards. */
2807 replace_buffer_in_windows_safely (Lisp_Object buffer
)
2809 Lisp_Object tail
, frame
;
2811 /* A single call to window_loop won't do the job because it only
2812 considers frames on the current keyboard. So loop manually over
2813 frames, and handle each one. */
2814 FOR_EACH_FRAME (tail
, frame
)
2815 window_loop (REPLACE_BUFFER_IN_WINDOWS_SAFELY
, buffer
, 1, frame
);
2818 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2819 minimum allowable size. */
2822 check_frame_size (FRAME_PTR frame
, int *rows
, int *cols
)
2824 /* For height, we have to see:
2825 how many windows the frame has at minimum (one or two),
2826 and whether it has a menu bar or other special stuff at the top. */
2828 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2829 ? MIN_SAFE_WINDOW_HEIGHT
2830 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2832 if (FRAME_TOP_MARGIN (frame
) > 0)
2833 min_height
+= FRAME_TOP_MARGIN (frame
);
2835 if (*rows
< min_height
)
2837 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2838 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2841 /* Adjust the margins of window W if text area is too small.
2842 Return 1 if window width is ok after adjustment; 0 if window
2843 is still too narrow. */
2846 adjust_window_margins (struct window
*w
)
2848 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2849 - WINDOW_FRINGE_COLS (w
)
2850 - WINDOW_SCROLL_BAR_COLS (w
));
2851 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2852 + WINDOW_RIGHT_MARGIN_COLS (w
));
2854 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2857 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2860 /* Window's text area is too narrow, but reducing the window
2861 margins will fix that. */
2862 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2863 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2865 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2866 w
->left_margin_cols
= w
->right_margin_cols
2867 = make_number (margin_cols
/2);
2869 w
->right_margin_cols
= make_number (margin_cols
);
2872 w
->left_margin_cols
= make_number (margin_cols
);
2876 /* The following three routines are needed for running a window's
2877 configuration change hook. */
2879 run_funs (Lisp_Object funs
)
2881 for (; CONSP (funs
); funs
= XCDR (funs
))
2882 if (!EQ (XCAR (funs
), Qt
))
2883 call0 (XCAR (funs
));
2887 select_window_norecord (Lisp_Object window
)
2889 return WINDOW_LIVE_P (window
)
2890 ? Fselect_window (window
, Qt
) : selected_window
;
2894 select_frame_norecord (Lisp_Object frame
)
2896 return FRAME_LIVE_P (XFRAME (frame
))
2897 ? Fselect_frame (frame
, Qt
) : selected_frame
;
2901 run_window_configuration_change_hook (struct frame
*f
)
2903 ptrdiff_t count
= SPECPDL_INDEX ();
2904 Lisp_Object frame
, global_wcch
2905 = Fdefault_value (Qwindow_configuration_change_hook
);
2906 XSETFRAME (frame
, f
);
2908 if (NILP (Vrun_hooks
) || !NILP (inhibit_lisp_code
))
2911 /* Use the right buffer. Matters when running the local hooks. */
2912 if (current_buffer
!= XBUFFER (Fwindow_buffer (Qnil
)))
2914 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
2915 Fset_buffer (Fwindow_buffer (Qnil
));
2918 if (SELECTED_FRAME () != f
)
2920 record_unwind_protect (select_frame_norecord
, Fselected_frame ());
2921 select_frame_norecord (frame
);
2924 /* Look for buffer-local values. */
2926 Lisp_Object windows
= Fwindow_list (frame
, Qlambda
, Qnil
);
2927 for (; CONSP (windows
); windows
= XCDR (windows
))
2929 Lisp_Object window
= XCAR (windows
);
2930 Lisp_Object buffer
= Fwindow_buffer (window
);
2931 if (!NILP (Flocal_variable_p (Qwindow_configuration_change_hook
,
2934 ptrdiff_t inner_count
= SPECPDL_INDEX ();
2935 record_unwind_protect (select_window_norecord
, Fselected_window ());
2936 select_window_norecord (window
);
2937 run_funs (Fbuffer_local_value (Qwindow_configuration_change_hook
,
2939 unbind_to (inner_count
, Qnil
);
2944 run_funs (global_wcch
);
2945 unbind_to (count
, Qnil
);
2948 DEFUN ("run-window-configuration-change-hook", Frun_window_configuration_change_hook
,
2949 Srun_window_configuration_change_hook
, 1, 1, 0,
2950 doc
: /* Run `window-configuration-change-hook' for FRAME. */)
2953 CHECK_LIVE_FRAME (frame
);
2954 run_window_configuration_change_hook (XFRAME (frame
));
2958 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2959 means it's allowed to run hooks. See make_frame for a case where
2960 it's not allowed. KEEP_MARGINS_P non-zero means that the current
2961 margins, fringes, and scroll-bar settings of the window are not
2962 reset from the buffer's local settings. */
2965 set_window_buffer (Lisp_Object window
, Lisp_Object buffer
, int run_hooks_p
, int keep_margins_p
)
2967 struct window
*w
= XWINDOW (window
);
2968 struct buffer
*b
= XBUFFER (buffer
);
2969 ptrdiff_t count
= SPECPDL_INDEX ();
2970 int samebuf
= EQ (buffer
, w
->buffer
);
2974 if (EQ (window
, selected_window
))
2975 BVAR (b
, last_selected_window
) = window
;
2977 /* Let redisplay errors through. */
2978 b
->display_error_modiff
= 0;
2980 /* Update time stamps of buffer display. */
2981 if (INTEGERP (BVAR (b
, display_count
)))
2982 XSETINT (BVAR (b
, display_count
), XINT (BVAR (b
, display_count
)) + 1);
2983 BVAR (b
, display_time
) = Fcurrent_time ();
2985 XSETFASTINT (w
->window_end_pos
, 0);
2986 XSETFASTINT (w
->window_end_vpos
, 0);
2987 memset (&w
->last_cursor
, 0, sizeof w
->last_cursor
);
2988 w
->window_end_valid
= Qnil
;
2989 if (!(keep_margins_p
&& samebuf
))
2990 { /* If we're not actually changing the buffer, don't reset hscroll and
2991 vscroll. This case happens for example when called from
2992 change_frame_size_1, where we use a dummy call to
2993 Fset_window_buffer on the frame's selected window (and no other)
2994 just in order to run window-configuration-change-hook.
2995 Resetting hscroll and vscroll here is problematic for things like
2996 image-mode and doc-view-mode since it resets the image's position
2997 whenever we resize the frame. */
2998 w
->hscroll
= w
->min_hscroll
= 0;
3000 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3001 set_marker_restricted (w
->start
,
3002 make_number (b
->last_window_start
),
3004 w
->start_at_line_beg
= 0;
3006 w
->last_modified
= 0;
3007 w
->last_overlay_modified
= 0;
3009 /* Maybe we could move this into the `if' but it's not obviously safe and
3010 I doubt it's worth the trouble. */
3011 windows_or_buffers_changed
++;
3013 /* We must select BUFFER for running the window-scroll-functions. */
3014 /* We can't check ! NILP (Vwindow_scroll_functions) here
3015 because that might itself be a local variable. */
3016 if (window_initialized
)
3018 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3019 Fset_buffer (buffer
);
3022 XMARKER (w
->pointm
)->insertion_type
= !NILP (Vwindow_point_insertion_type
);
3024 if (!keep_margins_p
)
3026 /* Set left and right marginal area width etc. from buffer. */
3028 /* This may call adjust_window_margins three times, so
3029 temporarily disable window margins. */
3030 Lisp_Object save_left
= w
->left_margin_cols
;
3031 Lisp_Object save_right
= w
->right_margin_cols
;
3033 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3035 Fset_window_fringes (window
,
3036 BVAR (b
, left_fringe_width
), BVAR (b
, right_fringe_width
),
3037 BVAR (b
, fringes_outside_margins
));
3039 Fset_window_scroll_bars (window
,
3040 BVAR (b
, scroll_bar_width
),
3041 BVAR (b
, vertical_scroll_bar_type
), Qnil
);
3043 w
->left_margin_cols
= save_left
;
3044 w
->right_margin_cols
= save_right
;
3046 Fset_window_margins (window
,
3047 BVAR (b
, left_margin_cols
), BVAR (b
, right_margin_cols
));
3052 if (! NILP (Vwindow_scroll_functions
))
3053 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3054 Fmarker_position (w
->start
));
3055 run_window_configuration_change_hook (XFRAME (WINDOW_FRAME (w
)));
3058 unbind_to (count
, Qnil
);
3061 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3062 doc
: /* Make WINDOW display BUFFER-OR-NAME as its contents.
3063 WINDOW has to be a live window and defaults to the selected one.
3064 BUFFER-OR-NAME must be a buffer or the name of an existing buffer.
3066 Optional third argument KEEP-MARGINS non-nil means that WINDOW's current
3067 display margins, fringe widths, and scroll bar settings are preserved;
3068 the default is to reset these from the local settings for BUFFER-OR-NAME
3069 or the frame defaults. Return nil.
3071 This function throws an error when WINDOW is strongly dedicated to its
3072 buffer (that is `window-dedicated-p' returns t for WINDOW) and does not
3073 already display BUFFER-OR-NAME.
3075 This function runs `window-scroll-functions' before running
3076 `window-configuration-change-hook'. */)
3077 (register Lisp_Object window
, Lisp_Object buffer_or_name
, Lisp_Object keep_margins
)
3079 register Lisp_Object tem
, buffer
;
3080 register struct window
*w
= decode_window (window
);
3082 XSETWINDOW (window
, w
);
3083 buffer
= Fget_buffer (buffer_or_name
);
3084 CHECK_BUFFER (buffer
);
3085 if (NILP (BVAR (XBUFFER (buffer
), name
)))
3086 error ("Attempt to display deleted buffer");
3090 error ("Window is deleted");
3091 else if (!EQ (tem
, Qt
))
3092 /* w->buffer is t when the window is first being set up. */
3094 if (!EQ (tem
, buffer
))
3096 if (EQ (w
->dedicated
, Qt
))
3097 /* WINDOW is strongly dedicated to its buffer, signal an
3099 error ("Window is dedicated to `%s'", SDATA (BVAR (XBUFFER (tem
), name
)));
3101 /* WINDOW is weakly dedicated to its buffer, reset
3103 w
->dedicated
= Qnil
;
3105 call1 (Qrecord_window_buffer
, window
);
3111 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3117 display_buffer (Lisp_Object buffer
, Lisp_Object not_this_window_p
, Lisp_Object override_frame
)
3119 return call3 (Qdisplay_buffer
, buffer
, not_this_window_p
, override_frame
);
3122 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3124 doc
: /* Force all windows to be updated on next redisplay.
3125 If optional arg OBJECT is a window, force redisplay of that window only.
3126 If OBJECT is a buffer or buffer name, force redisplay of all windows
3127 displaying that buffer. */)
3128 (Lisp_Object object
)
3132 windows_or_buffers_changed
++;
3133 update_mode_lines
++;
3137 if (WINDOWP (object
))
3139 struct window
*w
= XWINDOW (object
);
3140 mark_window_display_accurate (object
, 0);
3141 w
->update_mode_line
= 1;
3142 if (BUFFERP (w
->buffer
))
3143 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3144 ++update_mode_lines
;
3148 if (STRINGP (object
))
3149 object
= Fget_buffer (object
);
3150 if (BUFFERP (object
) && !NILP (BVAR (XBUFFER (object
), name
)))
3152 /* Walk all windows looking for buffer, and force update
3153 of each of those windows. */
3155 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3156 return NILP (object
) ? Qnil
: Qt
;
3159 /* If nothing suitable was found, just return.
3160 We could signal an error, but this feature will typically be used
3161 asynchronously in timers or process sentinels, so we don't. */
3167 temp_output_buffer_show (register Lisp_Object buf
)
3169 register struct buffer
*old
= current_buffer
;
3170 register Lisp_Object window
;
3171 register struct window
*w
;
3173 BVAR (XBUFFER (buf
), directory
) = BVAR (current_buffer
, directory
);
3176 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3180 set_buffer_internal (old
);
3182 if (!NILP (Vtemp_buffer_show_function
))
3183 call1 (Vtemp_buffer_show_function
, buf
);
3186 window
= display_buffer (buf
, Qnil
, Qnil
);
3188 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3189 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3190 Vminibuf_scroll_window
= window
;
3191 w
= XWINDOW (window
);
3194 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3195 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3197 /* Run temp-buffer-show-hook, with the chosen window selected
3198 and its buffer current. */
3200 ptrdiff_t count
= SPECPDL_INDEX ();
3201 Lisp_Object prev_window
, prev_buffer
;
3202 prev_window
= selected_window
;
3203 XSETBUFFER (prev_buffer
, old
);
3205 /* Select the window that was chosen, for running the hook.
3206 Note: Both Fselect_window and select_window_norecord may
3207 set-buffer to the buffer displayed in the window,
3208 so we need to save the current buffer. --stef */
3209 record_unwind_protect (Fset_buffer
, prev_buffer
);
3210 record_unwind_protect (select_window_norecord
, prev_window
);
3211 Fselect_window (window
, Qt
);
3212 Fset_buffer (w
->buffer
);
3213 Frun_hooks (1, &Qtemp_buffer_show_hook
);
3214 unbind_to (count
, Qnil
);
3219 DEFUN ("internal-temp-output-buffer-show",
3220 Ftemp_output_buffer_show
, Stemp_output_buffer_show
,
3222 doc
: /* Internal function for `with-output-to-temp-buffer'. */)
3225 temp_output_buffer_show (buf
);
3229 /* Make new window, have it replace WINDOW in window-tree, and make
3230 WINDOW its only vertical child (HORFLAG 1 means make WINDOW its only
3231 horizontal child). */
3233 make_parent_window (Lisp_Object window
, int horflag
)
3236 register struct window
*o
, *p
;
3238 o
= XWINDOW (window
);
3239 p
= allocate_window ();
3240 memcpy ((char *) p
+ sizeof (struct vectorlike_header
),
3241 (char *) o
+ sizeof (struct vectorlike_header
),
3242 sizeof (Lisp_Object
) * VECSIZE (struct window
));
3243 XSETWINDOW (parent
, p
);
3245 p
->sequence_number
= ++sequence_number
;
3247 replace_window (window
, parent
, 1);
3253 p
->hchild
= horflag
? window
: Qnil
;
3254 p
->vchild
= horflag
? Qnil
: window
;
3258 p
->combination_limit
= Qnil
;
3259 p
->window_parameters
= Qnil
;
3262 /* Make new window from scratch. */
3267 register struct window
*w
;
3269 w
= allocate_window ();
3270 /* Initialize Lisp data. Note that allocate_window initializes all
3271 Lisp data to nil, so do it only for slots which should not be nil. */
3272 XSETFASTINT (w
->left_col
, 0);
3273 XSETFASTINT (w
->top_line
, 0);
3274 XSETFASTINT (w
->total_lines
, 0);
3275 XSETFASTINT (w
->total_cols
, 0);
3276 w
->normal_lines
= make_float (1.0);
3277 w
->normal_cols
= make_float (1.0);
3278 XSETFASTINT (w
->new_total
, 0);
3279 XSETFASTINT (w
->new_normal
, 0);
3280 w
->start
= Fmake_marker ();
3281 w
->pointm
= Fmake_marker ();
3282 w
->vertical_scroll_bar_type
= Qt
;
3283 XSETFASTINT (w
->window_end_pos
, 0);
3284 XSETFASTINT (w
->window_end_vpos
, 0);
3286 /* Initialize non-Lisp data. Note that allocate_window zeroes out all
3287 non-Lisp data, so do it only for slots which should not be zero. */
3288 w
->nrows_scale_factor
= w
->ncols_scale_factor
= 1;
3289 w
->phys_cursor_type
= -1;
3290 w
->phys_cursor_width
= -1;
3291 w
->sequence_number
= ++sequence_number
;
3293 /* Reset window_list. */
3294 Vwindow_list
= Qnil
;
3295 /* Return window. */
3296 XSETWINDOW (window
, w
);
3300 DEFUN ("set-window-new-total", Fset_window_new_total
, Sset_window_new_total
, 2, 3, 0,
3301 doc
: /* Set new total size of WINDOW to SIZE.
3304 Optional argument ADD non-nil means add SIZE to the new total size of
3305 WINDOW and return the sum.
3307 Note: This function does not operate on any child windows of WINDOW. */)
3308 (Lisp_Object window
, Lisp_Object size
, Lisp_Object add
)
3310 struct window
*w
= decode_any_window (window
);
3312 CHECK_NUMBER (size
);
3314 XSETINT (w
->new_total
, XINT (size
));
3316 XSETINT (w
->new_total
, XINT (w
->new_total
) + XINT (size
));
3318 return w
->new_total
;
3321 DEFUN ("set-window-new-normal", Fset_window_new_normal
, Sset_window_new_normal
, 1, 2, 0,
3322 doc
: /* Set new normal size of WINDOW to SIZE.
3325 Note: This function does not operate on any child windows of WINDOW. */)
3326 (Lisp_Object window
, Lisp_Object size
)
3328 struct window
*w
= decode_any_window (window
);
3330 w
->new_normal
= size
;
3331 return w
->new_normal
;
3334 /* Return 1 if setting w->total_lines (w->total_cols if HORFLAG is
3335 non-zero) to w->new_total would result in correct heights (widths)
3336 for window W and recursively all child windows of W.
3338 Note: This function does not check any of `window-fixed-size-p',
3339 `window-min-height' or `window-min-width'. It does check that window
3340 sizes do not drop below one line (two columns). */
3342 window_resize_check (struct window
*w
, int horflag
)
3346 if (!NILP (w
->vchild
))
3347 /* W is a vertical combination. */
3349 c
= XWINDOW (w
->vchild
);
3351 /* All child windows of W must have the same width as W. */
3355 if ((XINT (c
->new_total
) != XINT (w
->new_total
))
3356 || !window_resize_check (c
, horflag
))
3358 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3363 /* The sum of the heights of the child windows of W must equal
3366 int sum_of_sizes
= 0;
3369 if (!window_resize_check (c
, horflag
))
3371 sum_of_sizes
= sum_of_sizes
+ XINT (c
->new_total
);
3372 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3374 return (sum_of_sizes
== XINT (w
->new_total
));
3377 else if (!NILP (w
->hchild
))
3378 /* W is a horizontal combination. */
3380 c
= XWINDOW (w
->hchild
);
3382 /* The sum of the widths of the child windows of W must equal W's
3385 int sum_of_sizes
= 0;
3388 if (!window_resize_check (c
, horflag
))
3390 sum_of_sizes
= sum_of_sizes
+ XINT (c
->new_total
);
3391 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3393 return (sum_of_sizes
== XINT (w
->new_total
));
3396 /* All child windows of W must have the same height as W. */
3400 if ((XINT (c
->new_total
) != XINT (w
->new_total
))
3401 || !window_resize_check (c
, horflag
))
3403 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3409 /* A leaf window. Make sure it's not too small. The following
3410 hardcodes the values of `window-safe-min-width' (2) and
3411 `window-safe-min-height' (1) which are defined in window.el. */
3412 return XINT (w
->new_total
) >= (horflag
? 2 : 1);
3415 /* Set w->total_lines (w->total_cols if HORIZONTAL is non-zero) to
3416 w->new_total for window W and recursively all child windows of W.
3417 Also calculate and assign the new vertical (horizontal) start
3418 positions of each of these windows.
3420 This function does not perform any error checks. Make sure you have
3421 run window_resize_check on W before applying this function. */
3423 window_resize_apply (struct window
*w
, int horflag
)
3428 /* Note: Assigning new_normal requires that the new total size of the
3429 parent window has been set *before*. */
3432 w
->total_cols
= w
->new_total
;
3433 if (NUMBERP (w
->new_normal
))
3434 w
->normal_cols
= w
->new_normal
;
3436 pos
= XINT (w
->left_col
);
3440 w
->total_lines
= w
->new_total
;
3441 if (NUMBERP (w
->new_normal
))
3442 w
->normal_lines
= w
->new_normal
;
3444 pos
= XINT (w
->top_line
);
3447 if (!NILP (w
->vchild
))
3448 /* W is a vertical combination. */
3450 c
= XWINDOW (w
->vchild
);
3454 XSETFASTINT (c
->left_col
, pos
);
3456 XSETFASTINT (c
->top_line
, pos
);
3457 window_resize_apply (c
, horflag
);
3459 pos
= pos
+ XINT (c
->total_lines
);
3460 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3463 else if (!NILP (w
->hchild
))
3464 /* W is a horizontal combination. */
3466 c
= XWINDOW (w
->hchild
);
3470 XSETFASTINT (c
->left_col
, pos
);
3472 XSETFASTINT (c
->top_line
, pos
);
3473 window_resize_apply (c
, horflag
);
3475 pos
= pos
+ XINT (c
->total_cols
);
3476 c
= NILP (c
->next
) ? 0 : XWINDOW (c
->next
);
3480 /* Clear out some redisplay caches. */
3481 w
->last_modified
= 0;
3482 w
->last_overlay_modified
= 0;
3486 DEFUN ("window-resize-apply", Fwindow_resize_apply
, Swindow_resize_apply
, 1, 2, 0,
3487 doc
: /* Apply requested size values for window-tree of FRAME.
3488 Optional argument HORIZONTAL omitted or nil means apply requested height
3489 values. HORIZONTAL non-nil means apply requested width values.
3491 This function checks whether the requested values sum up to a valid
3492 window layout, recursively assigns the new sizes of all child windows
3493 and calculates and assigns the new start positions of these windows.
3495 Note: This function does not check any of `window-fixed-size-p',
3496 `window-min-height' or `window-min-width'. All these checks have to
3497 be applied on the Elisp level. */)
3498 (Lisp_Object frame
, Lisp_Object horizontal
)
3502 int horflag
= !NILP (horizontal
);
3505 frame
= selected_frame
;
3506 CHECK_LIVE_FRAME (frame
);
3509 r
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3511 if (!window_resize_check (r
, horflag
)
3512 || ! EQ (r
->new_total
, (horflag
? r
->total_cols
: r
->total_lines
)))
3516 window_resize_apply (r
, horflag
);
3518 windows_or_buffers_changed
++;
3519 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3524 run_window_configuration_change_hook (f
);
3530 /* Resize frame F's windows when number of lines of F is set to SIZE.
3531 HORFLAG 1 means resize windows when number of columns of F is set to
3534 This function can delete all windows but the selected one in order to
3535 satisfy the request. The result will be meaningful if and only if
3536 F's windows have meaningful sizes when you call this. */
3538 resize_frame_windows (struct frame
*f
, int size
, int horflag
)
3540 Lisp_Object root
= f
->root_window
;
3541 struct window
*r
= XWINDOW (root
);
3542 Lisp_Object mini
= f
->minibuffer_window
;
3544 /* new_size is the new size of the frame's root window. */
3545 int new_size
= (horflag
3548 - FRAME_TOP_MARGIN (f
)
3549 - ((FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
3552 XSETFASTINT (r
->top_line
, FRAME_TOP_MARGIN (f
));
3553 if (NILP (r
->vchild
) && NILP (r
->hchild
))
3554 /* For a leaf root window just set the size. */
3556 XSETFASTINT (r
->total_cols
, new_size
);
3558 XSETFASTINT (r
->total_lines
, new_size
);
3561 /* old_size is the old size of the frame's root window. */
3562 int old_size
= XFASTINT (horflag
? r
->total_cols
: r
->total_lines
);
3565 XSETINT (delta
, new_size
- old_size
);
3566 /* Try a "normal" resize first. */
3567 resize_root_window (root
, delta
, horflag
? Qt
: Qnil
, Qnil
);
3568 if (window_resize_check (r
, horflag
) && new_size
== XINT (r
->new_total
))
3569 window_resize_apply (r
, horflag
);
3572 /* Try with "reasonable" minimum sizes next. */
3573 resize_root_window (root
, delta
, horflag
? Qt
: Qnil
, Qt
);
3574 if (window_resize_check (r
, horflag
)
3575 && new_size
== XINT (r
->new_total
))
3576 window_resize_apply (r
, horflag
);
3579 /* Finally, try with "safe" minimum sizes. */
3580 resize_root_window (root
, delta
, horflag
? Qt
: Qnil
, Qsafe
);
3581 if (window_resize_check (r
, horflag
)
3582 && new_size
== XINT (r
->new_total
))
3583 window_resize_apply (r
, horflag
);
3586 /* We lost. Delete all windows but the frame's
3588 root
= f
->selected_window
;
3589 Fdelete_other_windows_internal (root
, Qnil
);
3591 XSETFASTINT (XWINDOW (root
)->total_cols
, new_size
);
3593 XSETFASTINT (XWINDOW (root
)->total_lines
, new_size
);
3599 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
3603 XSETFASTINT (m
->total_cols
, size
);
3606 /* Are we sure we always want 1 line here? */
3607 XSETFASTINT (m
->total_lines
, 1);
3608 XSETFASTINT (m
->top_line
, XINT (r
->top_line
) + XINT (r
->total_lines
));
3614 DEFUN ("split-window-internal", Fsplit_window_internal
, Ssplit_window_internal
, 4, 4, 0,
3615 doc
: /* Split window OLD.
3616 Second argument TOTAL-SIZE specifies the number of lines or columns of the
3617 new window. In any case TOTAL-SIZE must be a positive integer.
3619 Third argument SIDE nil (or `below') specifies that the new window shall
3620 be located below WINDOW. SIDE `above' means the new window shall be
3621 located above WINDOW. In both cases TOTAL-SIZE specifies the number of
3622 lines of the new window including space reserved for the mode and/or
3625 SIDE t (or `right') specifies that the new window shall be located on
3626 the right side of WINDOW. SIDE `left' means the new window shall be
3627 located on the left of WINDOW. In both cases TOTAL-SIZE specifies the
3628 number of columns of the new window including space reserved for fringes
3629 and the scrollbar or a divider column.
3631 Fourth argument NORMAL-SIZE specifies the normal size of the new window
3632 according to the SIDE argument.
3634 The new total and normal sizes of all involved windows must have been
3635 set correctly. See the code of `split-window' for how this is done. */)
3636 (Lisp_Object old
, Lisp_Object total_size
, Lisp_Object side
, Lisp_Object normal_size
)
3638 /* OLD (*o) is the window we have to split. (*p) is either OLD's
3639 parent window or an internal window we have to install as OLD's new
3640 parent. REFERENCE (*r) must denote a live window, or is set to OLD
3641 provided OLD is a leaf window, or to the frame's selected window.
3642 NEW (*n) is the new window created with some parameters taken from
3644 register Lisp_Object
new, frame
, reference
;
3645 register struct window
*o
, *p
, *n
, *r
;
3648 /* HORFLAG is 1 when we split side-by-side, 0 otherwise. */
3649 = EQ (side
, Qt
) || EQ (side
, Qleft
) || EQ (side
, Qright
);
3650 int combination_limit
= 0;
3654 frame
= WINDOW_FRAME (o
);
3657 CHECK_NUMBER (total_size
);
3659 /* Set combination_limit to 1 if we have to make a new parent window.
3660 We do that if either `window-combination-limit' is t, or OLD has no
3661 parent, or OLD is ortho-combined. */
3663 !NILP (Vwindow_combination_limit
)
3666 ? (XWINDOW (o
->parent
)->hchild
)
3667 : (XWINDOW (o
->parent
)->vchild
));
3669 /* We need a live reference window to initialize some parameters. */
3670 if (WINDOW_LIVE_P (old
))
3671 /* OLD is live, use it as reference window. */
3674 /* Use the frame's selected window as reference window. */
3675 reference
= FRAME_SELECTED_WINDOW (f
);
3676 r
= XWINDOW (reference
);
3678 /* The following bugs are caught by `split-window'. */
3679 if (MINI_WINDOW_P (o
))
3680 error ("Attempt to split minibuffer window");
3681 else if (XINT (total_size
) < (horflag
? 2 : 1))
3682 error ("Size of new window too small (after split)");
3683 else if (!combination_limit
&& !NILP (Vwindow_combination_resize
))
3684 /* `window-combination-resize' non-nil means try to resize OLD's siblings
3687 p
= XWINDOW (o
->parent
);
3688 /* Temporarily pretend we split the parent window. */
3689 XSETINT (p
->new_total
,
3690 XINT (horflag
? p
->total_cols
: p
->total_lines
)
3691 - XINT (total_size
));
3692 if (!window_resize_check (p
, horflag
))
3693 error ("Window sizes don't fit");
3695 /* Undo the temporary pretension. */
3696 p
->new_total
= horflag
? p
->total_cols
: p
->total_lines
;
3700 if (!window_resize_check (o
, horflag
))
3701 error ("Resizing old window failed");
3702 else if (XINT (total_size
) + XINT (o
->new_total
)
3703 != XINT (horflag
? o
->total_cols
: o
->total_lines
))
3704 error ("Sum of sizes of old and new window don't fit");
3707 /* This is our point of no return. */
3708 if (combination_limit
)
3710 /* Save the old value of o->normal_cols/lines. It gets corrupted
3711 by make_parent_window and we need it below for assigning it to
3713 Lisp_Object new_normal
= horflag
? o
->normal_cols
: o
->normal_lines
;
3715 make_parent_window (old
, horflag
);
3716 p
= XWINDOW (o
->parent
);
3717 /* Store value of `window-combination-limit' in new parent's
3718 combination_limit slot. */
3719 p
->combination_limit
= Vwindow_combination_limit
;
3720 /* These get applied below. */
3721 p
->new_total
= horflag
? o
->total_cols
: o
->total_lines
;
3722 p
->new_normal
= new_normal
;
3725 p
= XWINDOW (o
->parent
);
3727 windows_or_buffers_changed
++;
3728 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3729 new = make_window ();
3732 n
->parent
= o
->parent
;
3733 n
->vchild
= n
->hchild
= Qnil
;
3735 if (EQ (side
, Qabove
) || EQ (side
, Qleft
))
3744 XWINDOW (n
->prev
)->next
= new;
3751 if (!NILP (n
->next
))
3752 XWINDOW (n
->next
)->prev
= new;
3758 n
->window_end_valid
= Qnil
;
3759 memset (&n
->last_cursor
, 0, sizeof n
->last_cursor
);
3761 /* Get special geometry settings from reference window. */
3762 n
->left_margin_cols
= r
->left_margin_cols
;
3763 n
->right_margin_cols
= r
->right_margin_cols
;
3764 n
->left_fringe_width
= r
->left_fringe_width
;
3765 n
->right_fringe_width
= r
->right_fringe_width
;
3766 n
->fringes_outside_margins
= r
->fringes_outside_margins
;
3767 n
->scroll_bar_width
= r
->scroll_bar_width
;
3768 n
->vertical_scroll_bar_type
= r
->vertical_scroll_bar_type
;
3770 /* Directly assign orthogonal coordinates and sizes. */
3773 n
->top_line
= o
->top_line
;
3774 n
->total_lines
= o
->total_lines
;
3778 n
->left_col
= o
->left_col
;
3779 n
->total_cols
= o
->total_cols
;
3782 /* Iso-coordinates and sizes are assigned by window_resize_apply,
3783 get them ready here. */
3784 n
->new_total
= total_size
;
3785 n
->new_normal
= normal_size
;
3788 window_resize_apply (p
, horflag
);
3790 /* Set buffer of NEW to buffer of reference window. Don't run
3792 set_window_buffer (new, r
->buffer
, 0, 1);
3795 /* Maybe we should run the scroll functions in Elisp (which already
3796 runs the configuration change hook). */
3797 if (! NILP (Vwindow_scroll_functions
))
3798 run_hook_with_args_2 (Qwindow_scroll_functions
, new,
3799 Fmarker_position (n
->start
));
3805 DEFUN ("delete-window-internal", Fdelete_window_internal
, Sdelete_window_internal
, 1, 1, 0,
3806 doc
: /* Remove WINDOW from its frame.
3807 WINDOW defaults to the selected window. Return nil.
3808 Signal an error when WINDOW is the only window on its frame. */)
3809 (register Lisp_Object window
)
3811 register Lisp_Object parent
, sibling
, frame
, root
;
3812 struct window
*w
, *p
, *s
, *r
;
3815 int before_sibling
= 0;
3817 w
= decode_any_window (window
);
3818 XSETWINDOW (window
, w
);
3819 if (NILP (w
->buffer
) && NILP (w
->hchild
) && NILP (w
->vchild
))
3820 /* It's a no-op to delete an already deleted window. */
3825 /* Never delete a minibuffer or frame root window. */
3826 error ("Attempt to delete minibuffer or sole ordinary window");
3827 else if (NILP (w
->prev
) && NILP (w
->next
))
3828 /* Rather bow out here, this case should be handled on the Elisp
3830 error ("Attempt to delete sole window of parent");
3832 p
= XWINDOW (parent
);
3833 horflag
= NILP (p
->vchild
);
3835 frame
= WINDOW_FRAME (w
);
3838 root
= FRAME_ROOT_WINDOW (f
);
3841 /* Unlink WINDOW from window tree. */
3843 /* Get SIBLING below (on the right of) WINDOW. */
3845 /* before_sibling 1 means WINDOW is the first child of its
3846 parent and thus before the sibling. */
3849 s
= XWINDOW (sibling
);
3852 p
->hchild
= sibling
;
3854 p
->vchild
= sibling
;
3857 /* Get SIBLING above (on the left of) WINDOW. */
3860 s
= XWINDOW (sibling
);
3862 if (!NILP (s
->next
))
3863 XWINDOW (s
->next
)->prev
= sibling
;
3866 if (window_resize_check (r
, horflag
)
3867 && EQ (r
->new_total
, (horflag
? r
->total_cols
: r
->total_lines
)))
3868 /* We can delete WINDOW now. */
3873 window_resize_apply (p
, horflag
);
3875 /* If this window is referred to by the dpyinfo's mouse
3876 highlight, invalidate that slot to be safe (Bug#9904). */
3877 if (!FRAME_INITIAL_P (f
))
3879 Mouse_HLInfo
*hlinfo
= MOUSE_HL_INFO (f
);
3881 if (EQ (hlinfo
->mouse_face_window
, window
))
3882 hlinfo
->mouse_face_window
= Qnil
;
3885 windows_or_buffers_changed
++;
3886 Vwindow_list
= Qnil
;
3887 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3889 w
->next
= Qnil
; /* Don't delete w->next too. */
3890 free_window_matrices (w
);
3892 if (!NILP (w
->vchild
))
3894 delete_all_child_windows (w
->vchild
);
3897 else if (!NILP (w
->hchild
))
3899 delete_all_child_windows (w
->hchild
);
3902 else if (!NILP (w
->buffer
))
3905 unchain_marker (XMARKER (w
->pointm
));
3906 unchain_marker (XMARKER (w
->start
));
3910 if (NILP (s
->prev
) && NILP (s
->next
))
3911 /* A matrjoshka where SIBLING has become the only child of
3914 /* Put SIBLING into PARENT's place. */
3915 replace_window (parent
, sibling
, 0);
3916 /* Have SIBLING inherit the following three slot values from
3917 PARENT (the combination_limit slot is not inherited). */
3918 s
->normal_cols
= p
->normal_cols
;
3919 s
->normal_lines
= p
->normal_lines
;
3920 /* Mark PARENT as deleted. */
3921 p
->vchild
= p
->hchild
= Qnil
;
3922 /* Try to merge SIBLING into its new parent. */
3923 recombine_windows (sibling
);
3928 if (!WINDOW_LIVE_P (FRAME_SELECTED_WINDOW (f
)))
3929 /* We deleted the frame's selected window. */
3931 /* Use the frame's first window as fallback ... */
3932 Lisp_Object new_selected_window
= Fframe_first_window (frame
);
3933 /* ... but preferably use its most recently used window. */
3934 Lisp_Object mru_window
;
3936 /* `get-mru-window' might fail for some reason so play it safe
3937 - promote the first window _without recording it_ first. */
3938 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
3939 Fselect_window (new_selected_window
, Qt
);
3941 FRAME_SELECTED_WINDOW (f
) = new_selected_window
;
3945 /* Now look whether `get-mru-window' gets us something. */
3946 mru_window
= call1 (Qget_mru_window
, frame
);
3947 if (WINDOW_LIVE_P (mru_window
)
3948 && EQ (XWINDOW (mru_window
)->frame
, frame
))
3949 new_selected_window
= mru_window
;
3951 /* If all ended up well, we now promote the mru window. */
3952 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
3953 Fselect_window (new_selected_window
, Qnil
);
3955 FRAME_SELECTED_WINDOW (f
) = new_selected_window
;
3960 /* Must be run by the caller:
3961 run_window_configuration_change_hook (f); */
3964 /* We failed: Relink WINDOW into window tree. */
3977 if (!NILP (w
->next
))
3978 XWINDOW (w
->next
)->prev
= window
;
3980 error ("Deletion failed");
3986 /***********************************************************************
3987 Resizing Mini-Windows
3988 ***********************************************************************/
3990 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we
3993 grow_mini_window (struct window
*w
, int delta
)
3995 struct frame
*f
= XFRAME (w
->frame
);
3997 Lisp_Object root
, value
;
3999 eassert (MINI_WINDOW_P (w
));
4000 eassert (delta
>= 0);
4002 root
= FRAME_ROOT_WINDOW (f
);
4004 value
= call2 (Qwindow_resize_root_window_vertically
,
4005 root
, make_number (- delta
));
4006 if (INTEGERP (value
) && window_resize_check (r
, 0))
4009 window_resize_apply (r
, 0);
4011 /* Grow the mini-window. */
4012 XSETFASTINT (w
->top_line
, XFASTINT (r
->top_line
) + XFASTINT (r
->total_lines
));
4013 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - XINT (value
));
4014 w
->last_modified
= 0;
4015 w
->last_overlay_modified
= 0;
4023 /* Shrink mini-window W. */
4025 shrink_mini_window (struct window
*w
)
4027 struct frame
*f
= XFRAME (w
->frame
);
4029 Lisp_Object root
, value
;
4032 eassert (MINI_WINDOW_P (w
));
4034 size
= XINT (w
->total_lines
);
4037 root
= FRAME_ROOT_WINDOW (f
);
4039 value
= call2 (Qwindow_resize_root_window_vertically
,
4040 root
, make_number (size
- 1));
4041 if (INTEGERP (value
) && window_resize_check (r
, 0))
4044 window_resize_apply (r
, 0);
4046 /* Shrink the mini-window. */
4047 XSETFASTINT (w
->top_line
, XFASTINT (r
->top_line
) + XFASTINT (r
->total_lines
));
4048 XSETFASTINT (w
->total_lines
, 1);
4050 w
->last_modified
= 0;
4051 w
->last_overlay_modified
= 0;
4056 /* If the above failed for whatever strange reason we must make a
4057 one window frame here. The same routine will be needed when
4058 shrinking the frame (and probably when making the initial
4059 *scratch* window). For the moment leave things as they are. */
4063 DEFUN ("resize-mini-window-internal", Fresize_mini_window_internal
, Sresize_mini_window_internal
, 1, 1, 0,
4064 doc
: /* Resize minibuffer window WINDOW. */)
4065 (Lisp_Object window
)
4067 struct window
*w
= XWINDOW (window
);
4072 CHECK_WINDOW (window
);
4073 f
= XFRAME (w
->frame
);
4075 if (!EQ (FRAME_MINIBUF_WINDOW (XFRAME (w
->frame
)), window
))
4076 error ("Not a valid minibuffer window");
4077 else if (FRAME_MINIBUF_ONLY_P (f
))
4078 error ("Cannot resize a minibuffer-only frame");
4080 r
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4081 height
= XINT (r
->total_lines
) + XINT (w
->total_lines
);
4082 if (window_resize_check (r
, 0)
4083 && XINT (w
->new_total
) > 0
4084 && height
== XINT (r
->new_total
) + XINT (w
->new_total
))
4087 window_resize_apply (r
, 0);
4089 w
->total_lines
= w
->new_total
;
4090 XSETFASTINT (w
->top_line
, XINT (r
->top_line
) + XINT (r
->total_lines
));
4092 windows_or_buffers_changed
++;
4093 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4097 run_window_configuration_change_hook (f
);
4100 else error ("Failed to resize minibuffer window");
4103 /* Mark window cursors off for all windows in the window tree rooted
4104 at W by setting their phys_cursor_on_p flag to zero. Called from
4105 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4106 the frame are cleared. */
4109 mark_window_cursors_off (struct window
*w
)
4113 if (!NILP (w
->hchild
))
4114 mark_window_cursors_off (XWINDOW (w
->hchild
));
4115 else if (!NILP (w
->vchild
))
4116 mark_window_cursors_off (XWINDOW (w
->vchild
));
4118 w
->phys_cursor_on_p
= 0;
4120 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4125 /* Return number of lines of text (not counting mode lines) in W. */
4128 window_internal_height (struct window
*w
)
4130 int ht
= XFASTINT (w
->total_lines
);
4132 if (!MINI_WINDOW_P (w
))
4134 if (!NILP (w
->parent
)
4135 || !NILP (w
->vchild
)
4136 || !NILP (w
->hchild
)
4139 || WINDOW_WANTS_MODELINE_P (w
))
4142 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4149 /************************************************************************
4151 ***********************************************************************/
4153 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4154 N screen-fulls, which is defined as the height of the window minus
4155 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4156 instead. Negative values of N mean scroll down. NOERROR non-zero
4157 means don't signal an error if we try to move over BEGV or ZV,
4161 window_scroll (Lisp_Object window
, EMACS_INT n
, int whole
, int noerror
)
4164 n
= clip_to_bounds (INT_MIN
, n
, INT_MAX
);
4166 /* If we must, use the pixel-based version which is much slower than
4167 the line-based one but can handle varying line heights. */
4168 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4169 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4171 window_scroll_line_based (window
, n
, whole
, noerror
);
4177 /* Implementation of window_scroll that works based on pixel line
4178 heights. See the comment of window_scroll for parameter
4182 window_scroll_pixel_based (Lisp_Object window
, int n
, int whole
, int noerror
)
4185 struct window
*w
= XWINDOW (window
);
4186 struct text_pos start
;
4187 int this_scroll_margin
;
4188 /* True if we fiddled the window vscroll field without really scrolling. */
4190 int x
, y
, rtop
, rbot
, rowh
, vpos
;
4191 void *itdata
= NULL
;
4193 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4194 /* Scrolling a minibuffer window via scroll bar when the echo area
4195 shows long text sometimes resets the minibuffer contents behind
4197 if (CHARPOS (start
) > ZV
)
4198 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
4200 /* If PT is not visible in WINDOW, move back one half of
4201 the screen. Allow PT to be partially visible, otherwise
4202 something like (scroll-down 1) with PT in the line before
4203 the partially visible one would recenter. */
4205 if (!pos_visible_p (w
, PT
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
))
4207 itdata
= bidi_shelve_cache ();
4208 /* Move backward half the height of the window. Performance note:
4209 vmotion used here is about 10% faster, but would give wrong
4210 results for variable height lines. */
4211 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4212 it
.current_y
= it
.last_visible_y
;
4213 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4215 /* The function move_iterator_vertically may move over more than
4216 the specified y-distance. If it->w is small, e.g. a
4217 mini-buffer window, we may end up in front of the window's
4218 display area. This is the case when Start displaying at the
4219 start of the line containing PT in this case. */
4220 if (it
.current_y
<= 0)
4222 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4223 move_it_vertically_backward (&it
, 0);
4227 start
= it
.current
.pos
;
4228 bidi_unshelve_cache (itdata
, 0);
4230 else if (auto_window_vscroll_p
)
4232 if (rtop
|| rbot
) /* partially visible */
4235 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4237 dy
= max ((window_box_height (w
)
4238 - next_screen_context_lines
* dy
),
4244 /* Only vscroll backwards if already vscrolled forwards. */
4245 if (w
->vscroll
< 0 && rtop
> 0)
4247 px
= max (0, -w
->vscroll
- min (rtop
, -dy
));
4248 Fset_window_vscroll (window
, make_number (px
), Qt
);
4254 /* Do vscroll if already vscrolled or only display line. */
4255 if (rbot
> 0 && (w
->vscroll
< 0 || vpos
== 0))
4257 px
= max (0, -w
->vscroll
+ min (rbot
, dy
));
4258 Fset_window_vscroll (window
, make_number (px
), Qt
);
4262 /* Maybe modify window start instead of scrolling. */
4263 if (rbot
> 0 || w
->vscroll
< 0)
4267 Fset_window_vscroll (window
, make_number (0), Qt
);
4268 /* If there are other text lines above the current row,
4269 move window start to current row. Else to next row. */
4271 spos
= XINT (Fline_beginning_position (Qnil
));
4273 spos
= min (XINT (Fline_end_position (Qnil
)) + 1, ZV
);
4274 set_marker_restricted (w
->start
, make_number (spos
),
4276 w
->start_at_line_beg
= 1;
4277 w
->update_mode_line
= 1;
4278 w
->last_modified
= 0;
4279 w
->last_overlay_modified
= 0;
4280 /* Set force_start so that redisplay_window will run the
4281 window-scroll-functions. */
4287 /* Cancel previous vscroll. */
4288 Fset_window_vscroll (window
, make_number (0), Qt
);
4291 itdata
= bidi_shelve_cache ();
4292 /* If scroll_preserve_screen_position is non-nil, we try to set
4293 point in the same window line as it is now, so get that line. */
4294 if (!NILP (Vscroll_preserve_screen_position
))
4296 /* We preserve the goal pixel coordinate across consecutive
4297 calls to scroll-up, scroll-down and other commands that
4298 have the `scroll-command' property. This avoids the
4299 possibility of point becoming "stuck" on a tall line when
4300 scrolling by one line. */
4301 if (window_scroll_pixel_based_preserve_y
< 0
4302 || !SYMBOLP (KVAR (current_kboard
, Vlast_command
))
4303 || NILP (Fget (KVAR (current_kboard
, Vlast_command
), Qscroll_command
)))
4305 start_display (&it
, w
, start
);
4306 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4307 window_scroll_pixel_based_preserve_y
= it
.current_y
;
4308 window_scroll_pixel_based_preserve_x
= it
.current_x
;
4312 window_scroll_pixel_based_preserve_y
4313 = window_scroll_pixel_based_preserve_x
= -1;
4315 /* Move iterator it from start the specified distance forward or
4316 backward. The result is the new window start. */
4317 start_display (&it
, w
, start
);
4320 ptrdiff_t start_pos
= IT_CHARPOS (it
);
4321 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4322 dy
= max ((window_box_height (w
)
4323 - next_screen_context_lines
* dy
),
4326 /* Note that move_it_vertically always moves the iterator to the
4327 start of a line. So, if the last line doesn't have a newline,
4328 we would end up at the start of the line ending at ZV. */
4331 move_it_vertically_backward (&it
, -dy
);
4332 /* Ensure we actually do move, e.g. in case we are currently
4333 looking at an image that is taller that the window height. */
4334 while (start_pos
== IT_CHARPOS (it
)
4335 && start_pos
> BEGV
)
4336 move_it_by_lines (&it
, -1);
4340 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4341 MOVE_TO_POS
| MOVE_TO_Y
);
4342 /* Ensure we actually do move, e.g. in case we are currently
4343 looking at an image that is taller that the window height. */
4344 while (start_pos
== IT_CHARPOS (it
)
4346 move_it_by_lines (&it
, 1);
4350 move_it_by_lines (&it
, n
);
4352 /* We failed if we find ZV is already on the screen (scrolling up,
4353 means there's nothing past the end), or if we can't start any
4354 earlier (scrolling down, means there's nothing past the top). */
4355 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4356 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4358 if (IT_CHARPOS (it
) == ZV
)
4360 if (it
.current_y
< it
.last_visible_y
4361 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4362 > it
.last_visible_y
))
4364 /* The last line was only partially visible, make it fully
4366 w
->vscroll
= (it
.last_visible_y
4367 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4368 adjust_glyphs (it
.f
);
4372 bidi_unshelve_cache (itdata
, 0);
4375 else if (n
< 0) /* could happen with empty buffers */
4376 xsignal0 (Qbeginning_of_buffer
);
4378 xsignal0 (Qend_of_buffer
);
4383 if (w
->vscroll
!= 0)
4384 /* The first line was only partially visible, make it fully
4389 bidi_unshelve_cache (itdata
, 0);
4393 xsignal0 (Qbeginning_of_buffer
);
4397 /* If control gets here, then we vscrolled. */
4399 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4401 /* Don't try to change the window start below. */
4407 ptrdiff_t pos
= IT_CHARPOS (it
);
4410 /* If in the middle of a multi-glyph character move forward to
4411 the next character. */
4412 if (in_display_vector_p (&it
))
4415 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4418 /* Set the window start, and set up the window for redisplay. */
4419 set_marker_restricted (w
->start
, make_number (pos
),
4421 bytepos
= XMARKER (w
->start
)->bytepos
;
4422 w
->start_at_line_beg
= (pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n');
4423 w
->update_mode_line
= 1;
4424 w
->last_modified
= 0;
4425 w
->last_overlay_modified
= 0;
4426 /* Set force_start so that redisplay_window will run the
4427 window-scroll-functions. */
4431 /* The rest of this function uses current_y in a nonstandard way,
4432 not including the height of the header line if any. */
4433 it
.current_y
= it
.vpos
= 0;
4435 /* Move PT out of scroll margins.
4436 This code wants current_y to be zero at the window start position
4437 even if there is a header line. */
4438 this_scroll_margin
= max (0, scroll_margin
);
4439 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4440 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4444 /* We moved the window start towards ZV, so PT may be now
4445 in the scroll margin at the top. */
4446 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4447 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
4448 && (NILP (Vscroll_preserve_screen_position
)
4449 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4450 /* We found PT at a legitimate height. Leave it alone. */
4452 else if (window_scroll_pixel_based_preserve_y
>= 0)
4454 /* If we have a header line, take account of it.
4455 This is necessary because we set it.current_y to 0, above. */
4456 move_it_to (&it
, -1,
4457 window_scroll_pixel_based_preserve_x
,
4458 window_scroll_pixel_based_preserve_y
4459 - (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0 ),
4460 -1, MOVE_TO_Y
| MOVE_TO_X
);
4461 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4465 while (it
.current_y
< this_scroll_margin
)
4467 int prev
= it
.current_y
;
4468 move_it_by_lines (&it
, 1);
4469 if (prev
== it
.current_y
)
4472 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4477 ptrdiff_t charpos
, bytepos
;
4480 /* Save our position, for the
4481 window_scroll_pixel_based_preserve_y case. */
4482 charpos
= IT_CHARPOS (it
);
4483 bytepos
= IT_BYTEPOS (it
);
4485 /* We moved the window start towards BEGV, so PT may be now
4486 in the scroll margin at the bottom. */
4487 move_it_to (&it
, PT
, -1,
4488 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
4489 - this_scroll_margin
- 1),
4491 MOVE_TO_POS
| MOVE_TO_Y
);
4493 /* Save our position, in case it's correct. */
4494 charpos
= IT_CHARPOS (it
);
4495 bytepos
= IT_BYTEPOS (it
);
4497 /* See if point is on a partially visible line at the end. */
4498 if (it
.what
== IT_EOB
)
4499 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
4502 move_it_by_lines (&it
, 1);
4503 partial_p
= it
.current_y
> it
.last_visible_y
;
4506 if (charpos
== PT
&& !partial_p
4507 && (NILP (Vscroll_preserve_screen_position
)
4508 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4509 /* We found PT before we found the display margin, so PT is ok. */
4511 else if (window_scroll_pixel_based_preserve_y
>= 0)
4513 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4514 start_display (&it
, w
, start
);
4515 /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT
4516 here because we called start_display again and did not
4517 alter it.current_y this time. */
4518 move_it_to (&it
, -1, window_scroll_pixel_based_preserve_x
,
4519 window_scroll_pixel_based_preserve_y
, -1,
4520 MOVE_TO_Y
| MOVE_TO_X
);
4521 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4526 /* The last line was only partially visible, so back up two
4527 lines to make sure we're on a fully visible line. */
4529 move_it_by_lines (&it
, -2);
4530 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4533 /* No, the position we saved is OK, so use it. */
4534 SET_PT_BOTH (charpos
, bytepos
);
4537 bidi_unshelve_cache (itdata
, 0);
4541 /* Implementation of window_scroll that works based on screen lines.
4542 See the comment of window_scroll for parameter descriptions. */
4545 window_scroll_line_based (Lisp_Object window
, int n
, int whole
, int noerror
)
4547 register struct window
*w
= XWINDOW (window
);
4548 /* Fvertical_motion enters redisplay, which can trigger
4549 fontification, which in turn can modify buffer text (e.g., if the
4550 fontification functions replace escape sequences with faces, as
4551 in `grep-mode-font-lock-keywords'). So we use a marker to record
4552 the old point position, to prevent crashes in SET_PT_BOTH. */
4553 Lisp_Object opoint_marker
= Fpoint_marker ();
4554 register ptrdiff_t pos
, pos_byte
;
4555 register int ht
= window_internal_height (w
);
4556 register Lisp_Object tem
;
4560 Lisp_Object original_pos
= Qnil
;
4562 /* If scrolling screen-fulls, compute the number of lines to
4563 scroll from the window's height. */
4565 n
*= max (1, ht
- next_screen_context_lines
);
4567 startpos
= marker_position (w
->start
);
4569 if (!NILP (Vscroll_preserve_screen_position
))
4571 if (window_scroll_preserve_vpos
<= 0
4572 || !SYMBOLP (KVAR (current_kboard
, Vlast_command
))
4573 || NILP (Fget (KVAR (current_kboard
, Vlast_command
), Qscroll_command
)))
4575 struct position posit
4576 = *compute_motion (startpos
, 0, 0, 0,
4580 window_scroll_preserve_vpos
= posit
.vpos
;
4581 window_scroll_preserve_hpos
= posit
.hpos
+ w
->hscroll
;
4584 original_pos
= Fcons (make_number (window_scroll_preserve_hpos
),
4585 make_number (window_scroll_preserve_vpos
));
4588 XSETFASTINT (tem
, PT
);
4589 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4593 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4598 lose
= n
< 0 && PT
== BEGV
;
4599 Fvertical_motion (make_number (n
), window
);
4603 SET_PT_BOTH (marker_position (opoint_marker
),
4604 marker_byte_position (opoint_marker
));
4611 xsignal0 (Qbeginning_of_buffer
);
4616 /* Don't use a scroll margin that is negative or too large. */
4617 int this_scroll_margin
=
4618 max (0, min (scroll_margin
, XINT (w
->total_lines
) / 4));
4620 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4621 w
->start_at_line_beg
= !NILP (bolp
);
4622 w
->update_mode_line
= 1;
4623 w
->last_modified
= 0;
4624 w
->last_overlay_modified
= 0;
4625 /* Set force_start so that redisplay_window will run
4626 the window-scroll-functions. */
4629 if (!NILP (Vscroll_preserve_screen_position
)
4630 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
4632 SET_PT_BOTH (pos
, pos_byte
);
4633 Fvertical_motion (original_pos
, window
);
4635 /* If we scrolled forward, put point enough lines down
4636 that it is outside the scroll margin. */
4641 if (this_scroll_margin
> 0)
4643 SET_PT_BOTH (pos
, pos_byte
);
4644 Fvertical_motion (make_number (this_scroll_margin
), window
);
4650 if (top_margin
<= marker_position (opoint_marker
))
4651 SET_PT_BOTH (marker_position (opoint_marker
),
4652 marker_byte_position (opoint_marker
));
4653 else if (!NILP (Vscroll_preserve_screen_position
))
4655 SET_PT_BOTH (pos
, pos_byte
);
4656 Fvertical_motion (original_pos
, window
);
4659 SET_PT (top_margin
);
4665 /* If we scrolled backward, put point near the end of the window
4666 but not within the scroll margin. */
4667 SET_PT_BOTH (pos
, pos_byte
);
4668 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4669 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4672 bottom_margin
= PT
+ 1;
4674 if (bottom_margin
> marker_position (opoint_marker
))
4675 SET_PT_BOTH (marker_position (opoint_marker
),
4676 marker_byte_position (opoint_marker
));
4679 if (!NILP (Vscroll_preserve_screen_position
))
4681 SET_PT_BOTH (pos
, pos_byte
);
4682 Fvertical_motion (original_pos
, window
);
4685 Fvertical_motion (make_number (-1), window
);
4694 xsignal0 (Qend_of_buffer
);
4699 /* Scroll selected_window up or down. If N is nil, scroll a
4700 screen-full which is defined as the height of the window minus
4701 next_screen_context_lines. If N is the symbol `-', scroll.
4702 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4703 up. This is the guts of Fscroll_up and Fscroll_down. */
4706 scroll_command (Lisp_Object n
, int direction
)
4708 ptrdiff_t count
= SPECPDL_INDEX ();
4710 eassert (eabs (direction
) == 1);
4712 /* If selected window's buffer isn't current, make it current for
4713 the moment. But don't screw up if window_scroll gets an error. */
4714 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4716 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4717 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4719 /* Make redisplay consider other windows than just selected_window. */
4720 ++windows_or_buffers_changed
;
4724 window_scroll (selected_window
, direction
, 1, 0);
4725 else if (EQ (n
, Qminus
))
4726 window_scroll (selected_window
, -direction
, 1, 0);
4729 n
= Fprefix_numeric_value (n
);
4730 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4733 unbind_to (count
, Qnil
);
4736 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "^P",
4737 doc
: /* Scroll text of selected window upward ARG lines.
4738 If ARG is omitted or nil, scroll upward by a near full screen.
4739 A near full screen is `next-screen-context-lines' less than a full screen.
4740 Negative ARG means scroll downward.
4741 If ARG is the atom `-', scroll downward by nearly full screen.
4742 When calling from a program, supply as argument a number, nil, or `-'. */)
4745 scroll_command (arg
, 1);
4749 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "^P",
4750 doc
: /* Scroll text of selected window down ARG lines.
4751 If ARG is omitted or nil, scroll down by a near full screen.
4752 A near full screen is `next-screen-context-lines' less than a full screen.
4753 Negative ARG means scroll upward.
4754 If ARG is the atom `-', scroll upward by nearly full screen.
4755 When calling from a program, supply as argument a number, nil, or `-'. */)
4758 scroll_command (arg
, -1);
4762 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4763 doc
: /* Return the other window for \"other window scroll\" commands.
4764 If `other-window-scroll-buffer' is non-nil, a window
4765 showing that buffer is used.
4766 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4767 specifies the window. This takes precedence over
4768 `other-window-scroll-buffer'. */)
4773 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4774 && !NILP (Vminibuf_scroll_window
))
4775 window
= Vminibuf_scroll_window
;
4776 /* If buffer is specified, scroll that buffer. */
4777 else if (!NILP (Vother_window_scroll_buffer
))
4779 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4781 window
= display_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4785 /* Nothing specified; look for a neighboring window on the same
4787 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4789 if (EQ (window
, selected_window
))
4790 /* That didn't get us anywhere; look for a window on another
4793 window
= Fnext_window (window
, Qnil
, Qt
);
4794 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4795 && ! EQ (window
, selected_window
));
4798 CHECK_LIVE_WINDOW (window
);
4800 if (EQ (window
, selected_window
))
4801 error ("There is no other window");
4806 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4807 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
4808 A near full screen is `next-screen-context-lines' less than a full screen.
4809 The next window is the one below the current one; or the one at the top
4810 if the current one is at the bottom. Negative ARG means scroll downward.
4811 If ARG is the atom `-', scroll downward by nearly full screen.
4812 When calling from a program, supply as argument a number, nil, or `-'.
4814 If `other-window-scroll-buffer' is non-nil, scroll the window
4815 showing that buffer, popping the buffer up if necessary.
4816 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4817 specifies the window to scroll. This takes precedence over
4818 `other-window-scroll-buffer'. */)
4823 ptrdiff_t count
= SPECPDL_INDEX ();
4825 window
= Fother_window_for_scrolling ();
4826 w
= XWINDOW (window
);
4828 /* Don't screw up if window_scroll gets an error. */
4829 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4830 ++windows_or_buffers_changed
;
4832 Fset_buffer (w
->buffer
);
4833 SET_PT (marker_position (w
->pointm
));
4836 window_scroll (window
, 1, 1, 1);
4837 else if (EQ (arg
, Qminus
))
4838 window_scroll (window
, -1, 1, 1);
4844 window_scroll (window
, XINT (arg
), 0, 1);
4847 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4848 unbind_to (count
, Qnil
);
4853 /* Scrolling amount must fit in both ptrdiff_t and Emacs fixnum. */
4854 #define HSCROLL_MAX min (PTRDIFF_MAX, MOST_POSITIVE_FIXNUM)
4856 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "^P\np",
4857 doc
: /* Scroll selected window display ARG columns left.
4858 Default for ARG is window width minus 2.
4859 Value is the total amount of leftward horizontal scrolling in
4860 effect after the change.
4861 If SET-MINIMUM is non-nil, the new scroll amount becomes the
4862 lower bound for automatic scrolling, i.e. automatic scrolling
4863 will not scroll a window to a column less than the value returned
4864 by this function. This happens in an interactive call. */)
4865 (register Lisp_Object arg
, Lisp_Object set_minimum
)
4869 struct window
*w
= XWINDOW (selected_window
);
4870 EMACS_INT requested_arg
= (NILP (arg
)
4871 ? window_body_cols (w
) - 2
4872 : XINT (Fprefix_numeric_value (arg
)));
4873 ptrdiff_t clipped_arg
=
4874 clip_to_bounds (- w
->hscroll
, requested_arg
, HSCROLL_MAX
- w
->hscroll
);
4875 hscroll
= w
->hscroll
+ clipped_arg
;
4876 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4878 if (!NILP (set_minimum
))
4879 w
->min_hscroll
= w
->hscroll
;
4884 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "^P\np",
4885 doc
: /* Scroll selected window display ARG columns right.
4886 Default for ARG is window width minus 2.
4887 Value is the total amount of leftward horizontal scrolling in
4888 effect after the change.
4889 If SET-MINIMUM is non-nil, the new scroll amount becomes the
4890 lower bound for automatic scrolling, i.e. automatic scrolling
4891 will not scroll a window to a column less than the value returned
4892 by this function. This happens in an interactive call. */)
4893 (register Lisp_Object arg
, Lisp_Object set_minimum
)
4897 struct window
*w
= XWINDOW (selected_window
);
4898 EMACS_INT requested_arg
= (NILP (arg
)
4899 ? window_body_cols (w
) - 2
4900 : XINT (Fprefix_numeric_value (arg
)));
4901 ptrdiff_t clipped_arg
=
4902 clip_to_bounds (w
->hscroll
- HSCROLL_MAX
, requested_arg
, w
->hscroll
);
4903 hscroll
= w
->hscroll
- clipped_arg
;
4904 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4906 if (!NILP (set_minimum
))
4907 w
->min_hscroll
= w
->hscroll
;
4912 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
4913 doc
: /* Return the window which was selected when entering the minibuffer.
4914 Returns nil, if selected window is not a minibuffer window. */)
4917 if (minibuf_level
> 0
4918 && MINI_WINDOW_P (XWINDOW (selected_window
))
4919 && WINDOW_LIVE_P (minibuf_selected_window
))
4920 return minibuf_selected_window
;
4925 /* Value is the number of lines actually displayed in window W,
4926 as opposed to its height. */
4929 displayed_window_lines (struct window
*w
)
4932 struct text_pos start
;
4933 int height
= window_box_height (w
);
4934 struct buffer
*old_buffer
;
4936 void *itdata
= NULL
;
4938 if (XBUFFER (w
->buffer
) != current_buffer
)
4940 old_buffer
= current_buffer
;
4941 set_buffer_internal (XBUFFER (w
->buffer
));
4946 /* In case W->start is out of the accessible range, do something
4947 reasonable. This happens in Info mode when Info-scroll-down
4948 calls (recenter -1) while W->start is 1. */
4949 if (XMARKER (w
->start
)->charpos
< BEGV
)
4950 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
4951 else if (XMARKER (w
->start
)->charpos
> ZV
)
4952 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
4954 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4956 itdata
= bidi_shelve_cache ();
4957 start_display (&it
, w
, start
);
4958 move_it_vertically (&it
, height
);
4959 bottom_y
= line_bottom_y (&it
);
4960 bidi_unshelve_cache (itdata
, 0);
4962 /* rms: On a non-window display,
4963 the value of it.vpos at the bottom of the screen
4964 seems to be 1 larger than window_box_height (w).
4965 This kludge fixes a bug whereby (move-to-window-line -1)
4966 when ZV is on the last screen line
4967 moves to the previous screen line instead of the last one. */
4968 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
4971 /* Add in empty lines at the bottom of the window. */
4972 if (bottom_y
< height
)
4974 int uy
= FRAME_LINE_HEIGHT (it
.f
);
4975 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
4979 set_buffer_internal (old_buffer
);
4985 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4986 doc
: /* Center point in selected window and maybe redisplay frame.
4987 With prefix argument ARG, recenter putting point on screen line ARG
4988 relative to the selected window. If ARG is negative, it counts up from the
4989 bottom of the window. (ARG should be less than the height of the window.)
4991 If ARG is omitted or nil, then recenter with point on the middle line of
4992 the selected window; if the variable `recenter-redisplay' is non-nil,
4993 also erase the entire frame and redraw it (when `auto-resize-tool-bars'
4994 is set to `grow-only', this resets the tool-bar's height to the minimum
4995 height needed); if `recenter-redisplay' has the special value `tty',
4996 then only tty frames are redrawn.
4998 Just C-u as prefix means put point in the center of the window
4999 and redisplay normally--don't erase and redraw the frame. */)
5000 (register Lisp_Object arg
)
5002 struct window
*w
= XWINDOW (selected_window
);
5003 struct buffer
*buf
= XBUFFER (w
->buffer
);
5004 struct buffer
*obuf
= current_buffer
;
5006 ptrdiff_t charpos
, bytepos
;
5007 EMACS_INT iarg
IF_LINT (= 0);
5008 int this_scroll_margin
;
5010 /* If redisplay is suppressed due to an error, try again. */
5011 obuf
->display_error_modiff
= 0;
5015 if (!NILP (Vrecenter_redisplay
)
5016 && (!EQ (Vrecenter_redisplay
, Qtty
)
5017 || !NILP (Ftty_type (selected_frame
))))
5021 /* Invalidate pixel data calculated for all compositions. */
5022 for (i
= 0; i
< n_compositions
; i
++)
5023 composition_table
[i
]->font
= NULL
;
5025 WINDOW_XFRAME (w
)->minimize_tool_bar_window_p
= 1;
5027 Fredraw_frame (WINDOW_FRAME (w
));
5028 SET_FRAME_GARBAGED (WINDOW_XFRAME (w
));
5033 else if (CONSP (arg
)) /* Just C-u. */
5037 arg
= Fprefix_numeric_value (arg
);
5042 set_buffer_internal (buf
);
5044 /* Do this after making BUF current
5045 in case scroll_margin is buffer-local. */
5046 this_scroll_margin
=
5047 max (0, min (scroll_margin
, XFASTINT (w
->total_lines
) / 4));
5049 /* Handle centering on a graphical frame specially. Such frames can
5050 have variable-height lines and centering point on the basis of
5051 line counts would lead to strange effects. */
5052 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5058 void *itdata
= bidi_shelve_cache ();
5060 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5061 start_display (&it
, w
, pt
);
5062 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5063 charpos
= IT_CHARPOS (it
);
5064 bytepos
= IT_BYTEPOS (it
);
5065 bidi_unshelve_cache (itdata
, 0);
5071 ptrdiff_t nlines
= min (PTRDIFF_MAX
, -iarg
);
5072 int extra_line_spacing
;
5073 int h
= window_box_height (w
);
5074 void *itdata
= bidi_shelve_cache ();
5076 iarg
= - max (-iarg
, this_scroll_margin
);
5078 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5079 start_display (&it
, w
, pt
);
5081 /* Be sure we have the exact height of the full line containing PT. */
5082 move_it_by_lines (&it
, 0);
5084 /* The amount of pixels we have to move back is the window
5085 height minus what's displayed in the line containing PT,
5086 and the lines below. */
5089 move_it_by_lines (&it
, nlines
);
5091 if (it
.vpos
== nlines
)
5095 /* Last line has no newline */
5096 h
-= line_bottom_y (&it
);
5100 /* Don't reserve space for extra line spacing of last line. */
5101 extra_line_spacing
= it
.max_extra_line_spacing
;
5103 /* If we can't move down NLINES lines because we hit
5104 the end of the buffer, count in some empty lines. */
5105 if (it
.vpos
< nlines
)
5108 extra_line_spacing
= it
.extra_line_spacing
;
5109 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5113 bidi_unshelve_cache (itdata
, 0);
5117 /* Now find the new top line (starting position) of the window. */
5118 start_display (&it
, w
, pt
);
5120 move_it_vertically_backward (&it
, h
);
5122 /* If extra line spacing is present, we may move too far
5123 back. This causes the last line to be only partially
5124 visible (which triggers redisplay to recenter that line
5125 in the middle), so move forward.
5126 But ignore extra line spacing on last line, as it is not
5127 considered to be part of the visible height of the line.
5129 h
+= extra_line_spacing
;
5130 while (-it
.current_y
> h
)
5131 move_it_by_lines (&it
, 1);
5133 charpos
= IT_CHARPOS (it
);
5134 bytepos
= IT_BYTEPOS (it
);
5136 bidi_unshelve_cache (itdata
, 0);
5140 struct position pos
;
5142 iarg
= max (iarg
, this_scroll_margin
);
5144 pos
= *vmotion (PT
, -iarg
, w
);
5145 charpos
= pos
.bufpos
;
5146 bytepos
= pos
.bytepos
;
5151 struct position pos
;
5152 int ht
= window_internal_height (w
);
5159 /* Don't let it get into the margin at either top or bottom. */
5160 iarg
= max (iarg
, this_scroll_margin
);
5161 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5163 pos
= *vmotion (PT
, - iarg
, w
);
5164 charpos
= pos
.bufpos
;
5165 bytepos
= pos
.bytepos
;
5168 /* Set the new window start. */
5169 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5170 w
->window_end_valid
= Qnil
;
5172 w
->optional_new_start
= 1;
5174 w
->start_at_line_beg
= (bytepos
== BEGV_BYTE
||
5175 FETCH_BYTE (bytepos
- 1) == '\n');
5177 set_buffer_internal (obuf
);
5181 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5183 doc
: /* Return the height in lines of the text display area of WINDOW.
5184 If WINDOW is omitted or nil, it defaults to the selected window.
5186 The returned height does not include the mode line, any header line,
5187 nor any partial-height lines at the bottom of the text area. */)
5188 (Lisp_Object window
)
5190 struct window
*w
= decode_window (window
);
5191 int pixel_height
= window_box_height (w
);
5192 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5193 return make_number (line_height
);
5198 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5200 doc
: /* Position point relative to window.
5201 ARG nil means position point at center of window.
5202 Else, ARG specifies vertical position within the window;
5203 zero means top of window, negative means relative to bottom of window. */)
5206 struct window
*w
= XWINDOW (selected_window
);
5210 int this_scroll_margin
;
5213 if (!(BUFFERP (w
->buffer
)
5214 && XBUFFER (w
->buffer
) == current_buffer
))
5215 /* This test is needed to make sure PT/PT_BYTE make sense in w->buffer
5216 when passed below to set_marker_both. */
5217 error ("move-to-window-line called from unrelated buffer");
5219 window
= selected_window
;
5220 start
= marker_position (w
->start
);
5221 if (start
< BEGV
|| start
> ZV
)
5223 int height
= window_internal_height (w
);
5224 Fvertical_motion (make_number (- (height
/ 2)), window
);
5225 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5226 w
->start_at_line_beg
= !NILP (Fbolp ());
5230 Fgoto_char (w
->start
);
5232 lines
= displayed_window_lines (w
);
5235 this_scroll_margin
= max (0, min (scroll_margin
, lines
/ 4));
5239 XSETFASTINT (arg
, lines
/ 2);
5242 EMACS_INT iarg
= XINT (Fprefix_numeric_value (arg
));
5245 iarg
= iarg
+ lines
;
5247 #if 0 /* This code would prevent move-to-window-line from moving point
5248 to a place inside the scroll margins (which would cause the
5249 next redisplay to scroll). I wrote this code, but then concluded
5250 it is probably better not to install it. However, it is here
5251 inside #if 0 so as not to lose it. -- rms. */
5253 /* Don't let it get into the margin at either top or bottom. */
5254 iarg
= max (iarg
, this_scroll_margin
);
5255 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5258 arg
= make_number (iarg
);
5261 /* Skip past a partially visible first line. */
5263 XSETINT (arg
, XINT (arg
) + 1);
5265 return Fvertical_motion (arg
, window
);
5270 /***********************************************************************
5271 Window Configuration
5272 ***********************************************************************/
5274 struct save_window_data
5276 struct vectorlike_header header
;
5277 Lisp_Object selected_frame
;
5278 Lisp_Object current_window
;
5279 Lisp_Object current_buffer
;
5280 Lisp_Object minibuf_scroll_window
;
5281 Lisp_Object minibuf_selected_window
;
5282 Lisp_Object root_window
;
5283 Lisp_Object focus_frame
;
5284 /* A vector, each of whose elements is a struct saved_window
5286 Lisp_Object saved_windows
;
5288 /* All fields above are traced by the GC.
5289 From `fame-cols' down, the fields are ignored by the GC. */
5291 int frame_cols
, frame_lines
, frame_menu_bar_lines
;
5292 int frame_tool_bar_lines
;
5295 /* This is saved as a Lisp_Vector */
5298 struct vectorlike_header header
;
5300 Lisp_Object window
, buffer
, start
, pointm
, mark
;
5301 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5302 Lisp_Object normal_cols
, normal_lines
;
5303 Lisp_Object hscroll
, min_hscroll
;
5304 Lisp_Object parent
, prev
;
5305 Lisp_Object start_at_line_beg
;
5306 Lisp_Object display_table
;
5307 Lisp_Object left_margin_cols
, right_margin_cols
;
5308 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5309 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
, dedicated
;
5310 Lisp_Object combination_limit
, window_parameters
;
5313 #define SAVED_WINDOW_N(swv,n) \
5314 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5316 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5317 doc
: /* Return t if OBJECT is a window-configuration object. */)
5318 (Lisp_Object object
)
5320 return WINDOW_CONFIGURATIONP (object
) ? Qt
: Qnil
;
5323 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5324 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5325 (Lisp_Object config
)
5327 register struct save_window_data
*data
;
5328 struct Lisp_Vector
*saved_windows
;
5330 CHECK_WINDOW_CONFIGURATION (config
);
5332 data
= (struct save_window_data
*) XVECTOR (config
);
5333 saved_windows
= XVECTOR (data
->saved_windows
);
5334 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5337 DEFUN ("set-window-configuration", Fset_window_configuration
,
5338 Sset_window_configuration
, 1, 1, 0,
5339 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5340 CONFIGURATION must be a value previously returned
5341 by `current-window-configuration' (which see).
5342 If CONFIGURATION was made from a frame that is now deleted,
5343 only frame-independent values can be restored. In this case,
5344 the return value is nil. Otherwise the value is t. */)
5345 (Lisp_Object configuration
)
5347 register struct save_window_data
*data
;
5348 struct Lisp_Vector
*saved_windows
;
5349 Lisp_Object new_current_buffer
;
5351 Lisp_Object auto_buffer_name
;
5353 ptrdiff_t old_point
= -1;
5355 CHECK_WINDOW_CONFIGURATION (configuration
);
5357 data
= (struct save_window_data
*) XVECTOR (configuration
);
5358 saved_windows
= XVECTOR (data
->saved_windows
);
5360 new_current_buffer
= data
->current_buffer
;
5361 if (NILP (BVAR (XBUFFER (new_current_buffer
), name
)))
5362 new_current_buffer
= Qnil
;
5365 if (XBUFFER (new_current_buffer
) == current_buffer
)
5366 /* The code further down "preserves point" by saving here PT in
5367 old_point and then setting it later back into PT. When the
5368 current-selected-window and the final-selected-window both show
5369 the current buffer, this suffers from the problem that the
5370 current PT is the window-point of the current-selected-window,
5371 while the final PT is the point of the final-selected-window, so
5372 this copy from one PT to the other would end up moving the
5373 window-point of the final-selected-window to the window-point of
5374 the current-selected-window. So we have to be careful which
5375 point of the current-buffer we copy into old_point. */
5376 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5377 && WINDOWP (selected_window
)
5378 && EQ (XWINDOW (selected_window
)->buffer
, new_current_buffer
)
5379 && !EQ (selected_window
, data
->current_window
))
5380 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5384 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5385 point in new_current_buffer as of the last time this buffer was
5386 used. This can be non-deterministic since it can be changed by
5387 things like jit-lock by mere temporary selection of some random
5388 window that happens to show this buffer.
5389 So if possible we want this arbitrary choice of "which point" to
5390 be the one from the to-be-selected-window so as to prevent this
5391 window's cursor from being copied from another window. */
5392 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5393 /* If current_window = selected_window, its point is in BUF_PT. */
5394 && !EQ (selected_window
, data
->current_window
))
5395 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5397 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5400 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5403 /* If f is a dead frame, don't bother rebuilding its window tree.
5404 However, there is other stuff we should still try to do below. */
5405 if (FRAME_LIVE_P (f
))
5408 Lisp_Object dead_windows
= Qnil
;
5409 register Lisp_Object tem
, par
, pers
;
5410 register struct window
*w
;
5411 register struct saved_window
*p
;
5412 struct window
*root_window
;
5413 struct window
**leaf_windows
;
5418 /* If the frame has been resized since this window configuration was
5419 made, we change the frame to the size specified in the
5420 configuration, restore the configuration, and then resize it
5421 back. We keep track of the prevailing height in these variables. */
5422 int previous_frame_lines
= FRAME_LINES (f
);
5423 int previous_frame_cols
= FRAME_COLS (f
);
5424 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5425 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5427 /* The mouse highlighting code could get screwed up
5428 if it runs during this. */
5431 if (data
->frame_lines
!= previous_frame_lines
5432 || data
->frame_cols
!= previous_frame_cols
)
5433 change_frame_size (f
, data
->frame_lines
,
5434 data
->frame_cols
, 0, 0, 0);
5435 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5436 if (data
->frame_menu_bar_lines
5437 != previous_frame_menu_bar_lines
)
5438 x_set_menu_bar_lines (f
, make_number (data
->frame_menu_bar_lines
),
5440 #ifdef HAVE_WINDOW_SYSTEM
5441 if (data
->frame_tool_bar_lines
5442 != previous_frame_tool_bar_lines
)
5443 x_set_tool_bar_lines (f
, make_number (data
->frame_tool_bar_lines
),
5448 /* "Swap out" point from the selected window's buffer
5449 into the window itself. (Normally the pointm of the selected
5450 window holds garbage.) We do this now, before
5451 restoring the window contents, and prevent it from
5452 being done later on when we select a new window. */
5453 if (! NILP (XWINDOW (selected_window
)->buffer
))
5455 w
= XWINDOW (selected_window
);
5456 set_marker_both (w
->pointm
,
5458 BUF_PT (XBUFFER (w
->buffer
)),
5459 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5462 windows_or_buffers_changed
++;
5463 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
5465 /* Problem: Freeing all matrices and later allocating them again
5466 is a serious redisplay flickering problem. What we would
5467 really like to do is to free only those matrices not reused
5469 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5471 = (struct window
**) alloca (count_windows (root_window
)
5472 * sizeof (struct window
*));
5473 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
5476 Mark all windows now on frame as "deleted".
5477 Restoring the new configuration "undeletes" any that are in it.
5479 Save their current buffers in their height fields, since we may
5480 need it later, if a buffer saved in the configuration is now
5482 delete_all_child_windows (FRAME_ROOT_WINDOW (f
));
5484 for (k
= 0; k
< saved_windows
->header
.size
; k
++)
5486 p
= SAVED_WINDOW_N (saved_windows
, k
);
5488 w
= XWINDOW (window
);
5491 if (!NILP (p
->parent
))
5492 w
->parent
= SAVED_WINDOW_N (saved_windows
,
5493 XFASTINT (p
->parent
))->window
;
5497 if (!NILP (p
->prev
))
5499 w
->prev
= SAVED_WINDOW_N (saved_windows
,
5500 XFASTINT (p
->prev
))->window
;
5501 XWINDOW (w
->prev
)->next
= p
->window
;
5506 if (!NILP (w
->parent
))
5508 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
5510 XWINDOW (w
->parent
)->vchild
= p
->window
;
5511 XWINDOW (w
->parent
)->hchild
= Qnil
;
5515 XWINDOW (w
->parent
)->hchild
= p
->window
;
5516 XWINDOW (w
->parent
)->vchild
= Qnil
;
5521 /* If we squirreled away the buffer in the window's height,
5523 if (BUFFERP (w
->total_lines
))
5524 w
->buffer
= w
->total_lines
;
5525 w
->left_col
= p
->left_col
;
5526 w
->top_line
= p
->top_line
;
5527 w
->total_cols
= p
->total_cols
;
5528 w
->total_lines
= p
->total_lines
;
5529 w
->normal_cols
= p
->normal_cols
;
5530 w
->normal_lines
= p
->normal_lines
;
5531 w
->hscroll
= XFASTINT (p
->hscroll
);
5532 w
->min_hscroll
= XFASTINT (p
->min_hscroll
);
5533 w
->display_table
= p
->display_table
;
5534 w
->left_margin_cols
= p
->left_margin_cols
;
5535 w
->right_margin_cols
= p
->right_margin_cols
;
5536 w
->left_fringe_width
= p
->left_fringe_width
;
5537 w
->right_fringe_width
= p
->right_fringe_width
;
5538 w
->fringes_outside_margins
= !NILP (p
->fringes_outside_margins
);
5539 w
->scroll_bar_width
= p
->scroll_bar_width
;
5540 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
5541 w
->dedicated
= p
->dedicated
;
5542 w
->combination_limit
= p
->combination_limit
;
5543 /* Restore any window parameters that have been saved.
5544 Parameters that have not been saved are left alone. */
5545 for (tem
= p
->window_parameters
; CONSP (tem
); tem
= XCDR (tem
))
5550 if (NILP (XCDR (pers
)))
5552 par
= Fassq (XCAR (pers
), w
->window_parameters
);
5553 if (CONSP (par
) && !NILP (XCDR (par
)))
5554 /* Reset a parameter to nil if and only if it
5555 has a non-nil association. Don't make new
5557 Fsetcdr (par
, Qnil
);
5560 /* Always restore a non-nil value. */
5561 Fset_window_parameter (window
, XCAR (pers
), XCDR (pers
));
5565 w
->last_modified
= 0;
5566 w
->last_overlay_modified
= 0;
5568 /* Reinstall the saved buffer and pointers into it. */
5569 if (NILP (p
->buffer
))
5570 /* An internal window. */
5571 w
->buffer
= p
->buffer
;
5572 else if (!NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5573 /* If saved buffer is alive, install it. */
5575 w
->buffer
= p
->buffer
;
5576 w
->start_at_line_beg
= !NILP (p
->start_at_line_beg
);
5577 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
5578 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
5579 Fset_marker (BVAR (XBUFFER (w
->buffer
), mark
),
5580 p
->mark
, w
->buffer
);
5582 /* As documented in Fcurrent_window_configuration, don't
5583 restore the location of point in the buffer which was
5584 current when the window configuration was recorded. */
5585 if (!EQ (p
->buffer
, new_current_buffer
)
5586 && XBUFFER (p
->buffer
) == current_buffer
)
5587 Fgoto_char (w
->pointm
);
5589 else if (!NILP (w
->buffer
) && !NILP (BVAR (XBUFFER (w
->buffer
), name
)))
5590 /* Keep window's old buffer; make sure the markers are
5593 /* Set window markers at start of visible range. */
5594 if (XMARKER (w
->start
)->buffer
== 0)
5595 set_marker_restricted (w
->start
, make_number (0),
5597 if (XMARKER (w
->pointm
)->buffer
== 0)
5598 set_marker_restricted_both (w
->pointm
, w
->buffer
,
5599 BUF_PT (XBUFFER (w
->buffer
)),
5600 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5601 w
->start_at_line_beg
= 1;
5603 else if (STRINGP (auto_buffer_name
=
5604 Fwindow_parameter (window
, Qauto_buffer_name
))
5605 && SCHARS (auto_buffer_name
) != 0
5606 && !NILP (w
->buffer
= Fget_buffer_create (auto_buffer_name
)))
5608 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5609 set_marker_restricted (w
->pointm
, make_number (0), w
->buffer
);
5610 w
->start_at_line_beg
= 1;
5613 /* Window has no live buffer, get one. */
5615 /* Get the buffer via other_buffer_safely in order to
5616 avoid showing an unimportant buffer and, if necessary, to
5617 recreate *scratch* in the course (part of Juanma's bs-show
5618 scenario from March 2011). */
5619 w
->buffer
= other_buffer_safely (Fcurrent_buffer ());
5620 /* This will set the markers to beginning of visible
5622 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5623 set_marker_restricted (w
->pointm
, make_number (0), w
->buffer
);
5624 w
->start_at_line_beg
= 1;
5625 if (!NILP (w
->dedicated
))
5626 /* Record this window as dead. */
5627 dead_windows
= Fcons (window
, dead_windows
);
5628 /* Make sure window is no more dedicated. */
5629 w
->dedicated
= Qnil
;
5633 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
5634 /* Arrange *not* to restore point in the buffer that was
5635 current when the window configuration was saved. */
5636 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
5637 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
5638 make_number (old_point
),
5639 XWINDOW (data
->current_window
)->buffer
);
5641 /* In the following call to `select-window', prevent "swapping out
5642 point" in the old selected window using the buffer that has
5643 been restored into it. We already swapped out that point from
5644 that window's old buffer. */
5645 select_window (data
->current_window
, Qnil
, 1);
5646 BVAR (XBUFFER (XWINDOW (selected_window
)->buffer
), last_selected_window
)
5649 if (NILP (data
->focus_frame
)
5650 || (FRAMEP (data
->focus_frame
)
5651 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5652 Fredirect_frame_focus (frame
, data
->focus_frame
);
5654 /* Set the screen height to the value it had before this function. */
5655 if (previous_frame_lines
!= FRAME_LINES (f
)
5656 || previous_frame_cols
!= FRAME_COLS (f
))
5657 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
5659 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5660 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5661 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5663 #ifdef HAVE_WINDOW_SYSTEM
5664 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5665 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5670 /* Now, free glyph matrices in windows that were not reused. */
5671 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5673 if (NILP (leaf_windows
[i
]->buffer
))
5675 /* Assert it's not reused as a combination. */
5676 eassert (NILP (leaf_windows
[i
]->hchild
)
5677 && NILP (leaf_windows
[i
]->vchild
));
5678 free_window_matrices (leaf_windows
[i
]);
5680 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5687 /* Scan dead buffer windows. */
5688 for (; CONSP (dead_windows
); dead_windows
= XCDR (dead_windows
))
5690 window
= XCAR (dead_windows
);
5691 if (WINDOW_LIVE_P (window
) && !EQ (window
, FRAME_ROOT_WINDOW (f
)))
5692 delete_deletable_window (window
);
5695 /* Fselect_window will have made f the selected frame, so we
5696 reselect the proper frame here. Fhandle_switch_frame will change the
5697 selected window too, but that doesn't make the call to
5698 Fselect_window above totally superfluous; it still sets f's
5700 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5701 do_switch_frame (data
->selected_frame
, 0, 0, Qnil
);
5703 run_window_configuration_change_hook (f
);
5706 if (!NILP (new_current_buffer
))
5707 Fset_buffer (new_current_buffer
);
5709 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5710 minibuf_selected_window
= data
->minibuf_selected_window
;
5712 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5716 /* Recursively delete all child windows reachable via the next, vchild,
5717 and hchild slots of WINDOW. */
5719 delete_all_child_windows (Lisp_Object window
)
5721 register struct window
*w
;
5723 w
= XWINDOW (window
);
5725 if (!NILP (w
->next
))
5726 /* Delete WINDOW's siblings (we traverse postorderly). */
5727 delete_all_child_windows (w
->next
);
5729 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5731 if (!NILP (w
->vchild
))
5733 delete_all_child_windows (w
->vchild
);
5736 else if (!NILP (w
->hchild
))
5738 delete_all_child_windows (w
->hchild
);
5741 else if (!NILP (w
->buffer
))
5744 unchain_marker (XMARKER (w
->pointm
));
5745 unchain_marker (XMARKER (w
->start
));
5749 Vwindow_list
= Qnil
;
5753 count_windows (register struct window
*window
)
5755 register int count
= 1;
5756 if (!NILP (window
->next
))
5757 count
+= count_windows (XWINDOW (window
->next
));
5758 if (!NILP (window
->vchild
))
5759 count
+= count_windows (XWINDOW (window
->vchild
));
5760 if (!NILP (window
->hchild
))
5761 count
+= count_windows (XWINDOW (window
->hchild
));
5766 /* Fill vector FLAT with leaf windows under W, starting at index I.
5767 Value is last index + 1. */
5769 get_leaf_windows (struct window
*w
, struct window
**flat
, int i
)
5773 if (!NILP (w
->hchild
))
5774 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5775 else if (!NILP (w
->vchild
))
5776 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5780 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5787 /* Return a pointer to the glyph W's physical cursor is on. Value is
5788 null if W's current matrix is invalid, so that no meaningful glyph
5791 get_phys_cursor_glyph (struct window
*w
)
5793 struct glyph_row
*row
;
5794 struct glyph
*glyph
;
5795 int hpos
= w
->phys_cursor
.hpos
;
5797 if (!(w
->phys_cursor
.vpos
>= 0
5798 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
))
5801 row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
);
5802 if (!row
->enabled_p
)
5807 /* When the window is hscrolled, cursor hpos can legitimately be
5808 out of bounds, but we draw the cursor at the corresponding
5809 window margin in that case. */
5810 if (!row
->reversed_p
&& hpos
< 0)
5812 if (row
->reversed_p
&& hpos
>= row
->used
[TEXT_AREA
])
5813 hpos
= row
->used
[TEXT_AREA
] - 1;
5816 if (row
->used
[TEXT_AREA
] > hpos
5818 glyph
= row
->glyphs
[TEXT_AREA
] + hpos
;
5827 save_window_save (Lisp_Object window
, struct Lisp_Vector
*vector
, int i
)
5829 register struct saved_window
*p
;
5830 register struct window
*w
;
5831 register Lisp_Object tem
, pers
, par
;
5833 for (;!NILP (window
); window
= w
->next
)
5835 p
= SAVED_WINDOW_N (vector
, i
);
5836 w
= XWINDOW (window
);
5838 XSETFASTINT (w
->temslot
, i
); i
++;
5840 p
->buffer
= w
->buffer
;
5841 p
->left_col
= w
->left_col
;
5842 p
->top_line
= w
->top_line
;
5843 p
->total_cols
= w
->total_cols
;
5844 p
->total_lines
= w
->total_lines
;
5845 p
->normal_cols
= w
->normal_cols
;
5846 p
->normal_lines
= w
->normal_lines
;
5847 XSETFASTINT (p
->hscroll
, w
->hscroll
);
5848 XSETFASTINT (p
->min_hscroll
, w
->min_hscroll
);
5849 p
->display_table
= w
->display_table
;
5850 p
->left_margin_cols
= w
->left_margin_cols
;
5851 p
->right_margin_cols
= w
->right_margin_cols
;
5852 p
->left_fringe_width
= w
->left_fringe_width
;
5853 p
->right_fringe_width
= w
->right_fringe_width
;
5854 p
->fringes_outside_margins
= w
->fringes_outside_margins
? Qt
: Qnil
;
5855 p
->scroll_bar_width
= w
->scroll_bar_width
;
5856 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
5857 p
->dedicated
= w
->dedicated
;
5858 p
->combination_limit
= w
->combination_limit
;
5859 p
->window_parameters
= Qnil
;
5861 if (!NILP (Vwindow_persistent_parameters
))
5863 /* Run cycle detection on Vwindow_persistent_parameters. */
5864 Lisp_Object tortoise
, hare
;
5866 hare
= tortoise
= Vwindow_persistent_parameters
;
5867 while (CONSP (hare
))
5874 tortoise
= XCDR (tortoise
);
5876 if (EQ (hare
, tortoise
))
5877 /* Reset Vwindow_persistent_parameters to Qnil. */
5879 Vwindow_persistent_parameters
= Qnil
;
5884 for (tem
= Vwindow_persistent_parameters
; CONSP (tem
);
5888 /* Save values for persistent window parameters. */
5889 if (CONSP (pers
) && !NILP (XCDR (pers
)))
5891 par
= Fassq (XCAR (pers
), w
->window_parameters
);
5893 /* If the window has no value for the parameter,
5895 p
->window_parameters
= Fcons (Fcons (XCAR (pers
), Qnil
),
5896 p
->window_parameters
);
5898 /* If the window has a value for the parameter,
5900 p
->window_parameters
= Fcons (Fcons (XCAR (par
),
5902 p
->window_parameters
);
5907 if (!NILP (w
->buffer
))
5909 /* Save w's value of point in the window configuration. If w
5910 is the selected window, then get the value of point from
5911 the buffer; pointm is garbage in the selected window. */
5912 if (EQ (window
, selected_window
))
5914 p
->pointm
= Fmake_marker ();
5915 set_marker_both (p
->pointm
, w
->buffer
,
5916 BUF_PT (XBUFFER (w
->buffer
)),
5917 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5920 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5921 XMARKER (p
->pointm
)->insertion_type
5922 = !NILP (Vwindow_point_insertion_type
);
5924 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5925 p
->start_at_line_beg
= w
->start_at_line_beg
? Qt
: Qnil
;
5927 tem
= BVAR (XBUFFER (w
->buffer
), mark
);
5928 p
->mark
= Fcopy_marker (tem
, Qnil
);
5935 p
->start_at_line_beg
= Qnil
;
5938 if (NILP (w
->parent
))
5941 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5946 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5948 if (!NILP (w
->vchild
))
5949 i
= save_window_save (w
->vchild
, vector
, i
);
5950 if (!NILP (w
->hchild
))
5951 i
= save_window_save (w
->hchild
, vector
, i
);
5957 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5958 Scurrent_window_configuration
, 0, 1, 0,
5959 doc
: /* Return an object representing the current window configuration of FRAME.
5960 If FRAME is nil or omitted, use the selected frame.
5961 This describes the number of windows, their sizes and current buffers,
5962 and for each displayed buffer, where display starts, and the positions of
5963 point and mark. An exception is made for point in the current buffer:
5964 its value is -not- saved.
5965 This also records the currently selected frame, and FRAME's focus
5966 redirection (see `redirect-frame-focus'). The variable
5967 `window-persistent-parameters' specifies which window parameters are
5968 saved by this function. */)
5971 register Lisp_Object tem
;
5972 register int n_windows
;
5973 register struct save_window_data
*data
;
5978 frame
= selected_frame
;
5979 CHECK_LIVE_FRAME (frame
);
5982 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5983 data
= ALLOCATE_PSEUDOVECTOR (struct save_window_data
, frame_cols
,
5984 PVEC_WINDOW_CONFIGURATION
);
5986 data
->frame_cols
= FRAME_COLS (f
);
5987 data
->frame_lines
= FRAME_LINES (f
);
5988 data
->frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5989 data
->frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5990 data
->selected_frame
= selected_frame
;
5991 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5992 XSETBUFFER (data
->current_buffer
, current_buffer
);
5993 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
5994 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
5995 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5996 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5997 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5998 data
->saved_windows
= tem
;
5999 for (i
= 0; i
< n_windows
; i
++)
6001 Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
));
6002 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6003 XSETWINDOW_CONFIGURATION (tem
, data
);
6007 /***********************************************************************
6009 ***********************************************************************/
6011 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6013 doc
: /* Set width of marginal areas of window WINDOW.
6014 If WINDOW is nil, set margins of the currently selected window.
6015 Second arg LEFT-WIDTH specifies the number of character cells to
6016 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6017 does the same for the right marginal area. A nil width parameter
6018 means no margin. */)
6019 (Lisp_Object window
, Lisp_Object left_width
, Lisp_Object right_width
)
6021 struct window
*w
= decode_window (window
);
6023 /* Translate negative or zero widths to nil.
6024 Margins that are too wide have to be checked elsewhere. */
6026 if (!NILP (left_width
))
6028 CHECK_NUMBER (left_width
);
6029 if (XINT (left_width
) <= 0)
6033 if (!NILP (right_width
))
6035 CHECK_NUMBER (right_width
);
6036 if (XINT (right_width
) <= 0)
6040 if (!EQ (w
->left_margin_cols
, left_width
)
6041 || !EQ (w
->right_margin_cols
, right_width
))
6043 w
->left_margin_cols
= left_width
;
6044 w
->right_margin_cols
= right_width
;
6046 adjust_window_margins (w
);
6048 ++windows_or_buffers_changed
;
6049 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6056 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6058 doc
: /* Get width of marginal areas of window WINDOW.
6059 If WINDOW is omitted or nil, it defaults to the selected window.
6060 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6061 If a marginal area does not exist, its width will be returned
6063 (Lisp_Object window
)
6065 struct window
*w
= decode_window (window
);
6066 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6071 /***********************************************************************
6073 ***********************************************************************/
6075 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6077 doc
: /* Set the fringe widths of window WINDOW.
6078 If WINDOW is nil, set the fringe widths of the currently selected
6080 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6081 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6082 fringe width. If a fringe width arg is nil, that means to use the
6083 frame's default fringe width. Default fringe widths can be set with
6084 the command `set-fringe-style'.
6085 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6086 outside of the display margins. By default, fringes are drawn between
6087 display marginal areas and the text area. */)
6088 (Lisp_Object window
, Lisp_Object left_width
, Lisp_Object right_width
, Lisp_Object outside_margins
)
6090 struct window
*w
= decode_window (window
);
6091 int outside
= !NILP (outside_margins
);
6093 if (!NILP (left_width
))
6094 CHECK_NATNUM (left_width
);
6095 if (!NILP (right_width
))
6096 CHECK_NATNUM (right_width
);
6098 /* Do nothing on a tty. */
6099 if (FRAME_WINDOW_P (WINDOW_XFRAME (w
))
6100 && (!EQ (w
->left_fringe_width
, left_width
)
6101 || !EQ (w
->right_fringe_width
, right_width
)
6102 || w
->fringes_outside_margins
!= outside
))
6104 w
->left_fringe_width
= left_width
;
6105 w
->right_fringe_width
= right_width
;
6106 w
->fringes_outside_margins
= outside
;
6108 adjust_window_margins (w
);
6110 clear_glyph_matrix (w
->current_matrix
);
6111 w
->window_end_valid
= Qnil
;
6113 ++windows_or_buffers_changed
;
6114 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6121 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6123 doc
: /* Get width of fringes of window WINDOW.
6124 If WINDOW is omitted or nil, it defaults to the selected window.
6125 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6126 (Lisp_Object window
)
6128 struct window
*w
= decode_window (window
);
6130 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6131 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6132 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6133 ? Qt
: Qnil
), Qnil
)));
6138 /***********************************************************************
6140 ***********************************************************************/
6142 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
,
6143 Sset_window_scroll_bars
, 2, 4, 0,
6144 doc
: /* Set width and type of scroll bars of window WINDOW.
6145 If window is nil, set scroll bars of the currently selected window.
6146 Second parameter WIDTH specifies the pixel width for the scroll bar;
6147 this is automatically adjusted to a multiple of the frame column width.
6148 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6149 bar: left, right, or nil.
6150 If WIDTH is nil, use the frame's scroll-bar width.
6151 If VERTICAL-TYPE is t, use the frame's scroll-bar type.
6152 Fourth parameter HORIZONTAL-TYPE is currently unused. */)
6153 (Lisp_Object window
, Lisp_Object width
, Lisp_Object vertical_type
, Lisp_Object horizontal_type
)
6155 struct window
*w
= decode_window (window
);
6159 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
6161 if (XINT (width
) == 0)
6162 vertical_type
= Qnil
;
6165 if (!(NILP (vertical_type
)
6166 || EQ (vertical_type
, Qleft
)
6167 || EQ (vertical_type
, Qright
)
6168 || EQ (vertical_type
, Qt
)))
6169 error ("Invalid type of vertical scroll bar");
6171 if (!EQ (w
->scroll_bar_width
, width
)
6172 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6174 w
->scroll_bar_width
= width
;
6175 w
->vertical_scroll_bar_type
= vertical_type
;
6177 adjust_window_margins (w
);
6179 clear_glyph_matrix (w
->current_matrix
);
6180 w
->window_end_valid
= Qnil
;
6182 ++windows_or_buffers_changed
;
6183 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6190 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6192 doc
: /* Get width and type of scroll bars of window WINDOW.
6193 If WINDOW is omitted or nil, it defaults to the selected window.
6194 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6195 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6197 (Lisp_Object window
)
6199 struct window
*w
= decode_window (window
);
6200 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6201 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6202 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6203 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6204 Fcons (w
->vertical_scroll_bar_type
,
6205 Fcons (Qnil
, Qnil
))));
6210 /***********************************************************************
6212 ***********************************************************************/
6214 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6215 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6216 If WINDOW is omitted or nil, it defaults to the selected window.
6217 Normally, value is a multiple of the canonical character height of WINDOW;
6218 optional second arg PIXELS-P means value is measured in pixels. */)
6219 (Lisp_Object window
, Lisp_Object pixels_p
)
6226 window
= selected_window
;
6228 CHECK_WINDOW (window
);
6229 w
= XWINDOW (window
);
6230 f
= XFRAME (w
->frame
);
6232 if (FRAME_WINDOW_P (f
))
6233 result
= (NILP (pixels_p
)
6234 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6235 : make_number (-w
->vscroll
));
6237 result
= make_number (0);
6242 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6244 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6245 WINDOW nil means use the selected window. Normally, VSCROLL is a
6246 non-negative multiple of the canonical character height of WINDOW;
6247 optional third arg PIXELS-P non-nil means that VSCROLL is in pixels.
6248 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6249 corresponds to an integral number of pixels. The return value is the
6250 result of this rounding.
6251 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6252 (Lisp_Object window
, Lisp_Object vscroll
, Lisp_Object pixels_p
)
6258 window
= selected_window
;
6260 CHECK_WINDOW (window
);
6261 CHECK_NUMBER_OR_FLOAT (vscroll
);
6263 w
= XWINDOW (window
);
6264 f
= XFRAME (w
->frame
);
6266 if (FRAME_WINDOW_P (f
))
6268 int old_dy
= w
->vscroll
;
6270 w
->vscroll
= - (NILP (pixels_p
)
6271 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6272 : XFLOATINT (vscroll
));
6273 w
->vscroll
= min (w
->vscroll
, 0);
6275 if (w
->vscroll
!= old_dy
)
6277 /* Adjust glyph matrix of the frame if the virtual display
6278 area becomes larger than before. */
6279 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6282 /* Prevent redisplay shortcuts. */
6283 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6287 return Fwindow_vscroll (window
, pixels_p
);
6291 /* Call FN for all leaf windows on frame F. FN is called with the
6292 first argument being a pointer to the leaf window, and with
6293 additional argument USER_DATA. Stops when FN returns 0. */
6296 foreach_window (struct frame
*f
, int (*fn
) (struct window
*, void *),
6299 /* delete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */
6300 if (WINDOWP (FRAME_ROOT_WINDOW (f
)))
6301 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6305 /* Helper function for foreach_window. Call FN for all leaf windows
6306 reachable from W. FN is called with the first argument being a
6307 pointer to the leaf window, and with additional argument USER_DATA.
6308 Stop when FN returns 0. Value is 0 if stopped by FN. */
6311 foreach_window_1 (struct window
*w
, int (*fn
) (struct window
*, void *), void *user_data
)
6315 for (cont
= 1; w
&& cont
;)
6317 if (!NILP (w
->hchild
))
6318 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6319 else if (!NILP (w
->vchild
))
6320 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6322 cont
= fn (w
, user_data
);
6324 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6331 /* Freeze or unfreeze the window start of W unless it is a
6332 mini-window or the selected window. FREEZE_P non-null means freeze
6333 the window start. */
6336 freeze_window_start (struct window
*w
, void *freeze_p
)
6338 if (MINI_WINDOW_P (w
)
6339 || (WINDOWP (selected_window
) /* Can be nil in corner cases. */
6340 && (w
== XWINDOW (selected_window
)
6341 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6342 && ! NILP (Vminibuf_scroll_window
)
6343 && w
== XWINDOW (Vminibuf_scroll_window
)))))
6346 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6351 /* Freeze or unfreeze the window starts of all leaf windows on frame
6352 F, except the selected window and a mini-window. FREEZE_P non-zero
6353 means freeze the window start. */
6356 freeze_window_starts (struct frame
*f
, int freeze_p
)
6358 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6362 /***********************************************************************
6364 ***********************************************************************/
6366 /* Return 1 if window configurations CONFIGURATION1 and CONFIGURATION2
6367 describe the same state of affairs. This is used by Fequal.
6369 ignore_positions non-zero means ignore non-matching scroll positions
6372 This ignores a couple of things like the dedication status of
6373 window, combination_limit and the like. This might have to be
6377 compare_window_configurations (Lisp_Object configuration1
, Lisp_Object configuration2
, int ignore_positions
)
6379 register struct save_window_data
*d1
, *d2
;
6380 struct Lisp_Vector
*sws1
, *sws2
;
6383 CHECK_WINDOW_CONFIGURATION (configuration1
);
6384 CHECK_WINDOW_CONFIGURATION (configuration2
);
6386 d1
= (struct save_window_data
*) XVECTOR (configuration1
);
6387 d2
= (struct save_window_data
*) XVECTOR (configuration2
);
6388 sws1
= XVECTOR (d1
->saved_windows
);
6389 sws2
= XVECTOR (d2
->saved_windows
);
6391 /* Frame settings must match. */
6392 if (d1
->frame_cols
!= d2
->frame_cols
6393 || d1
->frame_lines
!= d2
->frame_lines
6394 || d1
->frame_menu_bar_lines
!= d2
->frame_menu_bar_lines
6395 || !EQ (d1
->selected_frame
, d2
->selected_frame
)
6396 || !EQ (d1
->current_buffer
, d2
->current_buffer
)
6397 || (!ignore_positions
6398 && (!EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
)
6399 || !EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
)))
6400 || !EQ (d1
->focus_frame
, d2
->focus_frame
)
6401 /* Verify that the two configurations have the same number of windows. */
6402 || sws1
->header
.size
!= sws2
->header
.size
)
6405 for (i
= 0; i
< sws1
->header
.size
; i
++)
6407 struct saved_window
*sw1
, *sw2
;
6409 sw1
= SAVED_WINDOW_N (sws1
, i
);
6410 sw2
= SAVED_WINDOW_N (sws2
, i
);
6413 /* The "current" windows in the two configurations must
6414 correspond to each other. */
6415 EQ (d1
->current_window
, sw1
->window
)
6416 != EQ (d2
->current_window
, sw2
->window
)
6417 /* Windows' buffers must match. */
6418 || !EQ (sw1
->buffer
, sw2
->buffer
)
6419 || !EQ (sw1
->left_col
, sw2
->left_col
)
6420 || !EQ (sw1
->top_line
, sw2
->top_line
)
6421 || !EQ (sw1
->total_cols
, sw2
->total_cols
)
6422 || !EQ (sw1
->total_lines
, sw2
->total_lines
)
6423 || !EQ (sw1
->display_table
, sw2
->display_table
)
6424 /* The next two disjuncts check the window structure for
6426 || !EQ (sw1
->parent
, sw2
->parent
)
6427 || !EQ (sw1
->prev
, sw2
->prev
)
6428 || (!ignore_positions
6429 && (!EQ (sw1
->hscroll
, sw2
->hscroll
)
6430 || !EQ (sw1
->min_hscroll
, sw2
->min_hscroll
)
6431 || !EQ (sw1
->start_at_line_beg
, sw2
->start_at_line_beg
)
6432 || NILP (Fequal (sw1
->start
, sw2
->start
))
6433 || NILP (Fequal (sw1
->pointm
, sw2
->pointm
))
6434 || NILP (Fequal (sw1
->mark
, sw2
->mark
))))
6435 || !EQ (sw1
->left_margin_cols
, sw2
->left_margin_cols
)
6436 || !EQ (sw1
->right_margin_cols
, sw2
->right_margin_cols
)
6437 || !EQ (sw1
->left_fringe_width
, sw2
->left_fringe_width
)
6438 || !EQ (sw1
->right_fringe_width
, sw2
->right_fringe_width
)
6439 || !EQ (sw1
->fringes_outside_margins
, sw2
->fringes_outside_margins
)
6440 || !EQ (sw1
->scroll_bar_width
, sw2
->scroll_bar_width
)
6441 || !EQ (sw1
->vertical_scroll_bar_type
, sw2
->vertical_scroll_bar_type
))
6448 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6449 Scompare_window_configurations
, 2, 2, 0,
6450 doc
: /* Compare two window configurations as regards the structure of windows.
6451 This function ignores details such as the values of point and mark
6452 and scrolling positions. */)
6453 (Lisp_Object x
, Lisp_Object y
)
6455 if (compare_window_configurations (x
, y
, 1))
6461 init_window_once (void)
6463 struct frame
*f
= make_initial_frame ();
6464 XSETFRAME (selected_frame
, f
);
6465 Vterminal_frame
= selected_frame
;
6466 minibuf_window
= f
->minibuffer_window
;
6467 selected_window
= f
->selected_window
;
6468 last_nonminibuf_frame
= f
;
6470 window_initialized
= 1;
6476 Vwindow_list
= Qnil
;
6480 syms_of_window (void)
6482 DEFSYM (Qscroll_up
, "scroll-up");
6483 DEFSYM (Qscroll_down
, "scroll-down");
6484 DEFSYM (Qscroll_command
, "scroll-command");
6486 Fput (Qscroll_up
, Qscroll_command
, Qt
);
6487 Fput (Qscroll_down
, Qscroll_command
, Qt
);
6489 DEFSYM (Qwindow_configuration_change_hook
, "window-configuration-change-hook");
6490 DEFSYM (Qwindowp
, "windowp");
6491 DEFSYM (Qwindow_configuration_p
, "window-configuration-p");
6492 DEFSYM (Qwindow_live_p
, "window-live-p");
6493 DEFSYM (Qwindow_deletable_p
, "window-deletable-p");
6494 DEFSYM (Qdelete_window
, "delete-window");
6495 DEFSYM (Qwindow_resize_root_window
, "window--resize-root-window");
6496 DEFSYM (Qwindow_resize_root_window_vertically
, "window--resize-root-window-vertically");
6497 DEFSYM (Qsafe
, "safe");
6498 DEFSYM (Qdisplay_buffer
, "display-buffer");
6499 DEFSYM (Qreplace_buffer_in_windows
, "replace-buffer-in-windows");
6500 DEFSYM (Qrecord_window_buffer
, "record-window-buffer");
6501 DEFSYM (Qget_mru_window
, "get-mru-window");
6502 DEFSYM (Qtemp_buffer_show_hook
, "temp-buffer-show-hook");
6503 DEFSYM (Qabove
, "above");
6504 DEFSYM (Qbelow
, "below");
6505 DEFSYM (Qauto_buffer_name
, "auto-buffer-name");
6506 DEFSYM (Qclone_of
, "clone-of");
6508 staticpro (&Vwindow_list
);
6510 minibuf_selected_window
= Qnil
;
6511 staticpro (&minibuf_selected_window
);
6513 window_scroll_pixel_based_preserve_x
= -1;
6514 window_scroll_pixel_based_preserve_y
= -1;
6515 window_scroll_preserve_hpos
= -1;
6516 window_scroll_preserve_vpos
= -1;
6518 DEFVAR_LISP ("temp-buffer-show-function", Vtemp_buffer_show_function
,
6519 doc
: /* Non-nil means call as function to display a help buffer.
6520 The function is called with one argument, the buffer to be displayed.
6521 Used by `with-output-to-temp-buffer'.
6522 If this function is used, then it must do the entire job of showing
6523 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
6524 Vtemp_buffer_show_function
= Qnil
;
6526 DEFVAR_LISP ("minibuffer-scroll-window", Vminibuf_scroll_window
,
6527 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
6528 Vminibuf_scroll_window
= Qnil
;
6530 DEFVAR_BOOL ("mode-line-in-non-selected-windows", mode_line_in_non_selected_windows
,
6531 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
6532 If the minibuffer is active, the `minibuffer-scroll-window' mode line
6533 is displayed in the `mode-line' face. */);
6534 mode_line_in_non_selected_windows
= 1;
6536 DEFVAR_LISP ("other-window-scroll-buffer", Vother_window_scroll_buffer
,
6537 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
6538 Vother_window_scroll_buffer
= Qnil
;
6540 DEFVAR_BOOL ("auto-window-vscroll", auto_window_vscroll_p
,
6541 doc
: /* Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
6542 auto_window_vscroll_p
= 1;
6544 DEFVAR_INT ("next-screen-context-lines", next_screen_context_lines
,
6545 doc
: /* Number of lines of continuity when scrolling by screenfuls. */);
6546 next_screen_context_lines
= 2;
6548 DEFVAR_LISP ("scroll-preserve-screen-position",
6549 Vscroll_preserve_screen_position
,
6550 doc
: /* Controls if scroll commands move point to keep its screen position unchanged.
6551 A value of nil means point does not keep its screen position except
6552 at the scroll margin or window boundary respectively.
6553 A value of t means point keeps its screen position if the scroll
6554 command moved it vertically out of the window, e.g. when scrolling
6556 Any other value means point always keeps its screen position.
6557 Scroll commands should have the `scroll-command' property
6558 on their symbols to be controlled by this variable. */);
6559 Vscroll_preserve_screen_position
= Qnil
;
6561 DEFVAR_LISP ("window-point-insertion-type", Vwindow_point_insertion_type
,
6562 doc
: /* Type of marker to use for `window-point'. */);
6563 Vwindow_point_insertion_type
= Qnil
;
6565 DEFVAR_LISP ("window-configuration-change-hook",
6566 Vwindow_configuration_change_hook
,
6567 doc
: /* Functions to call when window configuration changes.
6568 The buffer-local part is run once per window, with the relevant window
6569 selected; while the global part is run only once for the modified frame,
6570 with the relevant frame selected. */);
6571 Vwindow_configuration_change_hook
= Qnil
;
6573 DEFVAR_LISP ("recenter-redisplay", Vrecenter_redisplay
,
6574 doc
: /* Non-nil means `recenter' redraws entire frame.
6575 If this option is non-nil, then the `recenter' command with a nil
6576 argument will redraw the entire frame; the special value `tty' causes
6577 the frame to be redrawn only if it is a tty frame. */);
6578 Vrecenter_redisplay
= Qtty
;
6580 DEFVAR_LISP ("window-combination-resize", Vwindow_combination_resize
,
6581 doc
: /* If t, resize window combinations proportionally.
6582 If this variable is nil, splitting a window gets the entire screen space
6583 for displaying the new window from the window to split. Deleting and
6584 resizing a window preferably resizes one adjacent window only.
6586 If this variable is t, splitting a window tries to get the space
6587 proportionally from all windows in the same combination. This also
6588 allows to split a window that is otherwise too small or of fixed size.
6589 Resizing and deleting a window proportionally resize all windows in the
6592 Other values are reserved for future use.
6594 This variable takes no effect if `window-combination-limit' is non-nil. */);
6595 Vwindow_combination_resize
= Qnil
;
6597 DEFVAR_LISP ("window-combination-limit", Vwindow_combination_limit
,
6598 doc
: /* If t, splitting a window makes a new parent window.
6599 If this variable is nil, splitting a window will create a new parent
6600 window only if the window has no parent window or the window shall
6601 become a combination orthogonal to the one it is part of.
6603 If this variable is t, splitting a window always creates a new parent
6604 window. If all splits behave this way, each frame's window tree is a
6605 binary tree and every window but the frame's root window has exactly one
6608 Other values are reserved for future use.
6610 The value of this variable is also assigned to the combination limit of
6611 the new parent window. The combination limit of a window can be
6612 retrieved via the function `window-combination-limit' and altered by the
6613 function `set-window-combination-limit'. */);
6614 Vwindow_combination_limit
= Qnil
;
6616 DEFVAR_LISP ("window-persistent-parameters", Vwindow_persistent_parameters
,
6617 doc
: /* Alist of persistent window parameters.
6618 This alist specifies which window parameters shall get saved by
6619 `current-window-configuration' and `window-state-get' and subsequently
6620 restored to their previous values by `set-window-configuration' and
6623 The car of each entry of this alist is the symbol specifying the
6624 parameter. The cdr is one of the following:
6626 nil means the parameter is neither saved by `window-state-get' nor by
6627 `current-window-configuration'.
6629 t means the parameter is saved by `current-window-configuration' and,
6630 provided its WRITABLE argument is nil, by `window-state-get'.
6632 The symbol `writable' means the parameter is saved unconditionally by
6633 both `current-window-configuration' and `window-state-get'. Do not use
6634 this value for parameters without read syntax (like windows or frames).
6636 Parameters not saved by `current-window-configuration' or
6637 `window-state-get' are left alone by `set-window-configuration'
6638 respectively are not installed by `window-state-put'. */);
6639 Vwindow_persistent_parameters
= list1 (Fcons (Qclone_of
, Qt
));
6641 defsubr (&Sselected_window
);
6642 defsubr (&Sminibuffer_window
);
6643 defsubr (&Swindow_minibuffer_p
);
6644 defsubr (&Swindowp
);
6645 defsubr (&Swindow_live_p
);
6646 defsubr (&Swindow_frame
);
6647 defsubr (&Sframe_root_window
);
6648 defsubr (&Sframe_first_window
);
6649 defsubr (&Sframe_selected_window
);
6650 defsubr (&Sset_frame_selected_window
);
6651 defsubr (&Spos_visible_in_window_p
);
6652 defsubr (&Swindow_line_height
);
6653 defsubr (&Swindow_buffer
);
6654 defsubr (&Swindow_parent
);
6655 defsubr (&Swindow_top_child
);
6656 defsubr (&Swindow_left_child
);
6657 defsubr (&Swindow_next_sibling
);
6658 defsubr (&Swindow_prev_sibling
);
6659 defsubr (&Swindow_combination_limit
);
6660 defsubr (&Sset_window_combination_limit
);
6661 defsubr (&Swindow_use_time
);
6662 defsubr (&Swindow_top_line
);
6663 defsubr (&Swindow_left_column
);
6664 defsubr (&Swindow_total_height
);
6665 defsubr (&Swindow_total_width
);
6666 defsubr (&Swindow_normal_size
);
6667 defsubr (&Swindow_new_total
);
6668 defsubr (&Swindow_new_normal
);
6669 defsubr (&Sset_window_new_total
);
6670 defsubr (&Sset_window_new_normal
);
6671 defsubr (&Swindow_resize_apply
);
6672 defsubr (&Swindow_body_height
);
6673 defsubr (&Swindow_body_width
);
6674 defsubr (&Swindow_hscroll
);
6675 defsubr (&Sset_window_hscroll
);
6676 defsubr (&Swindow_redisplay_end_trigger
);
6677 defsubr (&Sset_window_redisplay_end_trigger
);
6678 defsubr (&Swindow_edges
);
6679 defsubr (&Swindow_pixel_edges
);
6680 defsubr (&Swindow_absolute_pixel_edges
);
6681 defsubr (&Swindow_inside_edges
);
6682 defsubr (&Swindow_inside_pixel_edges
);
6683 defsubr (&Swindow_inside_absolute_pixel_edges
);
6684 defsubr (&Scoordinates_in_window_p
);
6685 defsubr (&Swindow_at
);
6686 defsubr (&Swindow_point
);
6687 defsubr (&Swindow_start
);
6688 defsubr (&Swindow_end
);
6689 defsubr (&Sset_window_point
);
6690 defsubr (&Sset_window_start
);
6691 defsubr (&Swindow_dedicated_p
);
6692 defsubr (&Sset_window_dedicated_p
);
6693 defsubr (&Swindow_display_table
);
6694 defsubr (&Sset_window_display_table
);
6695 defsubr (&Snext_window
);
6696 defsubr (&Sprevious_window
);
6697 defsubr (&Sget_buffer_window
);
6698 defsubr (&Sdelete_other_windows_internal
);
6699 defsubr (&Sdelete_window_internal
);
6700 defsubr (&Sresize_mini_window_internal
);
6701 defsubr (&Sset_window_buffer
);
6702 defsubr (&Srun_window_configuration_change_hook
);
6703 defsubr (&Sselect_window
);
6704 defsubr (&Sforce_window_update
);
6705 defsubr (&Stemp_output_buffer_show
);
6706 defsubr (&Ssplit_window_internal
);
6707 defsubr (&Sscroll_up
);
6708 defsubr (&Sscroll_down
);
6709 defsubr (&Sscroll_left
);
6710 defsubr (&Sscroll_right
);
6711 defsubr (&Sother_window_for_scrolling
);
6712 defsubr (&Sscroll_other_window
);
6713 defsubr (&Sminibuffer_selected_window
);
6714 defsubr (&Srecenter
);
6715 defsubr (&Swindow_text_height
);
6716 defsubr (&Smove_to_window_line
);
6717 defsubr (&Swindow_configuration_p
);
6718 defsubr (&Swindow_configuration_frame
);
6719 defsubr (&Sset_window_configuration
);
6720 defsubr (&Scurrent_window_configuration
);
6721 defsubr (&Sset_window_margins
);
6722 defsubr (&Swindow_margins
);
6723 defsubr (&Sset_window_fringes
);
6724 defsubr (&Swindow_fringes
);
6725 defsubr (&Sset_window_scroll_bars
);
6726 defsubr (&Swindow_scroll_bars
);
6727 defsubr (&Swindow_vscroll
);
6728 defsubr (&Sset_window_vscroll
);
6729 defsubr (&Scompare_window_configurations
);
6730 defsubr (&Swindow_list
);
6731 defsubr (&Swindow_list_1
);
6732 defsubr (&Swindow_prev_buffers
);
6733 defsubr (&Sset_window_prev_buffers
);
6734 defsubr (&Swindow_next_buffers
);
6735 defsubr (&Sset_window_next_buffers
);
6736 defsubr (&Swindow_parameters
);
6737 defsubr (&Swindow_parameter
);
6738 defsubr (&Sset_window_parameter
);
6742 keys_of_window (void)
6744 initial_define_key (control_x_map
, '<', "scroll-left");
6745 initial_define_key (control_x_map
, '>', "scroll-right");
6747 initial_define_key (global_map
, Ctl ('V'), "scroll-up-command");
6748 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
6749 initial_define_key (meta_map
, 'v', "scroll-down-command");