1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000, 2001
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
34 #include "dispextern.h"
35 #include "blockinput.h"
36 #include "intervals.h"
40 #endif /* HAVE_X_WINDOWS */
51 /* Values returned from coordinates_in_window. */
65 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
66 Lisp_Object Qwindow_size_fixed
, Qleft_fringe
, Qright_fringe
;
67 extern Lisp_Object Qheight
, Qwidth
;
69 static int displayed_window_lines
P_ ((struct window
*));
70 static struct window
*decode_window
P_ ((Lisp_Object
));
71 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
72 static int count_windows
P_ ((struct window
*));
73 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
74 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
75 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
76 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
77 static int window_min_size_1
P_ ((struct window
*, int));
78 static int window_min_size
P_ ((struct window
*, int, int, int *));
79 static void size_window
P_ ((Lisp_Object
, int, int, int));
80 static int freeze_window_start
P_ ((struct window
*, void *));
81 static int window_fixed_size_p
P_ ((struct window
*, int, int));
82 static void enlarge_window
P_ ((Lisp_Object
, int, int));
83 static Lisp_Object window_list
P_ ((void));
84 static int add_window_to_list
P_ ((struct window
*, void *));
85 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
87 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
89 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
91 static int foreach_window_1
P_ ((struct window
*,
92 int (* fn
) (struct window
*, void *),
94 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
96 /* The value of `window-size-fixed'. */
98 int window_size_fixed
;
100 /* This is the window in which the terminal's cursor should
101 be left when nothing is being done with it. This must
102 always be a leaf window, and its buffer is selected by
103 the top level editing loop at the end of each command.
105 This value is always the same as
106 FRAME_SELECTED_WINDOW (selected_frame). */
108 Lisp_Object selected_window
;
110 /* A list of all windows for use by next_window and Fwindow_list.
111 Functions creating or deleting windows should invalidate this cache
112 by setting it to nil. */
114 Lisp_Object Vwindow_list
;
116 /* The mini-buffer window of the selected frame.
117 Note that you cannot test for mini-bufferness of an arbitrary window
118 by comparing against this; but you can test for mini-bufferness of
119 the selected window. */
121 Lisp_Object minibuf_window
;
123 /* Non-nil means it is the window for C-M-v to scroll
124 when the mini-buffer is selected. */
126 Lisp_Object Vminibuf_scroll_window
;
128 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
130 Lisp_Object Vother_window_scroll_buffer
;
132 /* Non-nil means it's function to call to display temp buffers. */
134 Lisp_Object Vtemp_buffer_show_function
;
136 /* If a window gets smaller than either of these, it is removed. */
138 int window_min_height
;
139 int window_min_width
;
141 /* Nonzero implies Fdisplay_buffer should create windows. */
145 /* Nonzero implies make new frames for Fdisplay_buffer. */
149 /* Nonzero means reuse existing frames for displaying buffers. */
151 int display_buffer_reuse_frames
;
153 /* Non-nil means use this function instead of default */
155 Lisp_Object Vpop_up_frame_function
;
157 /* Function to call to handle Fdisplay_buffer. */
159 Lisp_Object Vdisplay_buffer_function
;
161 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
163 Lisp_Object Veven_window_heights
;
165 /* List of buffer *names* for buffers that should have their own frames. */
167 Lisp_Object Vspecial_display_buffer_names
;
169 /* List of regexps for buffer names that should have their own frames. */
171 Lisp_Object Vspecial_display_regexps
;
173 /* Function to pop up a special frame. */
175 Lisp_Object Vspecial_display_function
;
177 /* List of buffer *names* for buffers to appear in selected window. */
179 Lisp_Object Vsame_window_buffer_names
;
181 /* List of regexps for buffer names to appear in selected window. */
183 Lisp_Object Vsame_window_regexps
;
185 /* Hook run at end of temp_output_buffer_show. */
187 Lisp_Object Qtemp_buffer_show_hook
;
189 /* Fdisplay_buffer always splits the largest window
190 if that window is more than this high. */
192 int split_height_threshold
;
194 /* Number of lines of continuity in scrolling by screenfuls. */
196 int next_screen_context_lines
;
198 /* Incremented for each window created. */
200 static int sequence_number
;
202 /* Nonzero after init_window_once has finished. */
204 static int window_initialized
;
206 /* Hook to run when window config changes. */
208 Lisp_Object Qwindow_configuration_change_hook
;
209 Lisp_Object Vwindow_configuration_change_hook
;
211 /* Nonzero means scroll commands try to put point
212 at the same screen height as previously. */
214 Lisp_Object Vscroll_preserve_screen_position
;
216 #if 0 /* This isn't used anywhere. */
217 /* Nonzero means we can split a frame even if it is "unsplittable". */
218 static int inhibit_frame_unsplittable
;
221 extern int scroll_margin
;
223 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
225 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
226 doc
: /* Returns t if OBJECT is a window. */)
230 return WINDOWP (object
) ? Qt
: Qnil
;
233 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
234 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
238 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
245 register struct window
*p
;
247 p
= allocate_window ();
248 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
249 XSETFASTINT (p
->left
, 0);
250 XSETFASTINT (p
->top
, 0);
251 XSETFASTINT (p
->height
, 0);
252 XSETFASTINT (p
->width
, 0);
253 XSETFASTINT (p
->hscroll
, 0);
254 XSETFASTINT (p
->min_hscroll
, 0);
255 p
->orig_top
= p
->orig_height
= Qnil
;
256 p
->start
= Fmake_marker ();
257 p
->pointm
= Fmake_marker ();
258 XSETFASTINT (p
->use_time
, 0);
260 p
->display_table
= Qnil
;
262 p
->pseudo_window_p
= 0;
263 bzero (&p
->cursor
, sizeof (p
->cursor
));
264 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
265 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
266 p
->desired_matrix
= p
->current_matrix
= 0;
267 p
->phys_cursor_type
= -1;
268 p
->must_be_updated_p
= 0;
269 XSETFASTINT (p
->window_end_vpos
, 0);
270 XSETFASTINT (p
->window_end_pos
, 0);
271 p
->window_end_valid
= Qnil
;
274 XSETFASTINT (p
->last_point
, 0);
275 p
->frozen_window_start_p
= 0;
281 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
282 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
285 return selected_window
;
288 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
289 doc
: /* Return the window used now for minibuffers.
290 If the optional argument FRAME is specified, return the minibuffer window
291 used by that frame. */)
296 frame
= selected_frame
;
297 CHECK_LIVE_FRAME (frame
);
298 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
301 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
302 doc
: /* Returns non-nil if WINDOW is a minibuffer window. */)
306 struct window
*w
= decode_window (window
);
307 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
311 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
312 Spos_visible_in_window_p
, 0, 3, 0,
313 doc
: /* Return t if position POS is currently on the frame in WINDOW.
314 Return nil if that position is scrolled vertically out of view.
315 If a character is only partially visible, nil is returned, unless the
316 optional argument PARTIALLY is non-nil.
317 POS defaults to point in WINDOW; WINDOW defaults to the selected window. */)
318 (pos
, window
, partially
)
319 Lisp_Object pos
, window
, partially
;
321 register struct window
*w
;
323 register struct buffer
*buf
;
325 Lisp_Object in_window
;
328 w
= decode_window (window
);
329 buf
= XBUFFER (w
->buffer
);
330 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
334 CHECK_NUMBER_COERCE_MARKER (pos
);
337 else if (w
== XWINDOW (selected_window
))
340 posint
= XMARKER (w
->pointm
)->charpos
;
342 /* If position is above window start, it's not visible. */
343 if (posint
< CHARPOS (top
))
345 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
346 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
347 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
349 /* If frame is up-to-date, and POSINT is < window end pos, use
350 that info. This doesn't work for POSINT == end pos, because
351 the window end pos is actually the position _after_ the last
352 char in the window. */
353 if (NILP (partially
))
355 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
356 in_window
= fully_p
? Qt
: Qnil
;
361 else if (posint
> BUF_ZV (buf
))
363 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
364 /* If window start is out of range, do something reasonable. */
368 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
369 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
378 static struct window
*
379 decode_window (window
)
380 register Lisp_Object window
;
383 return XWINDOW (selected_window
);
385 CHECK_LIVE_WINDOW (window
);
386 return XWINDOW (window
);
389 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
390 doc
: /* Return the buffer that WINDOW is displaying. */)
394 return decode_window (window
)->buffer
;
397 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
398 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
402 return decode_window (window
)->height
;
405 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
406 doc
: /* Return the number of display columns in WINDOW.
407 This is the width that is usable columns available for text in WINDOW.
408 If you want to find out how many columns WINDOW takes up,
409 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
413 return make_number (window_internal_width (decode_window (window
)));
416 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
417 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
421 return decode_window (window
)->hscroll
;
424 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
425 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
426 NCOL should be zero or positive. */)
428 Lisp_Object window
, ncol
;
430 struct window
*w
= decode_window (window
);
434 hscroll
= max (0, XINT (ncol
));
436 /* Prevent redisplay shortcuts when changing the hscroll. */
437 if (XINT (w
->hscroll
) != hscroll
)
438 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
440 w
->hscroll
= make_number (hscroll
);
444 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
445 Swindow_redisplay_end_trigger
, 0, 1, 0,
446 doc
: /* Return WINDOW's redisplay end trigger value.
447 See `set-window-redisplay-end-trigger' for more information. */)
451 return decode_window (window
)->redisplay_end_trigger
;
454 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
455 Sset_window_redisplay_end_trigger
, 2, 2, 0,
456 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
457 VALUE should be a buffer position (typically a marker) or nil.
458 If it is a buffer position, then if redisplay in WINDOW reaches a position
459 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
460 with two arguments: WINDOW, and the end trigger value.
461 Afterwards the end-trigger value is reset to nil. */)
463 register Lisp_Object window
, value
;
465 register struct window
*w
;
467 w
= decode_window (window
);
468 w
->redisplay_end_trigger
= value
;
472 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
473 doc
: /* Return a list of the edge coordinates of WINDOW.
474 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
475 RIGHT is one more than the rightmost column used by WINDOW,
476 and BOTTOM is one more than the bottommost row used by WINDOW
477 and its mode-line. */)
481 register struct window
*w
= decode_window (window
);
483 return Fcons (w
->left
, Fcons (w
->top
,
484 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
485 Fcons (make_number (XFASTINT (w
->top
)
486 + XFASTINT (w
->height
)),
490 /* Test if the character at column *X, row *Y is within window W.
491 If it is not, return 0;
492 if it is in the window's text area,
493 set *x and *y to its location relative to the upper left corner
496 if it is on the window's modeline, return 2;
497 if it is on the border between the window and its right sibling,
499 if it is on the window's top line, return 4;
500 if it is in left or right fringe of the window,
501 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
503 X and Y are frame relative pixel coordinates. */
505 static enum window_part
506 coordinates_in_window (w
, x
, y
)
507 register struct window
*w
;
510 /* Let's make this a global enum later, instead of using numbers
512 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
513 int left_x
, right_x
, top_y
, bottom_y
;
514 int fringe_width
= FRAME_LEFT_FRINGE_WIDTH (f
);
515 enum window_part part
;
516 int ux
= CANON_X_UNIT (f
);
517 int x0
= XFASTINT (w
->left
) * ux
;
518 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
519 /* The width of the area where the vertical line can be dragged.
520 (Between mode lines for instance. */
521 int grabbable_width
= ux
;
523 if (*x
< x0
|| *x
>= x1
)
526 /* In what's below, we subtract 1 when computing right_x because we
527 want the rightmost pixel, which is given by left_pixel+width-1. */
528 if (w
->pseudo_window_p
)
531 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
532 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
533 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
537 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
538 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
539 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
540 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
541 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
542 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
545 /* On the mode line or header line? If it's near the start of
546 the mode or header line of window that's has a horizontal
547 sibling, say it's on the vertical line. That's to be able
548 to resize windows horizontally in case we're using toolkit
551 if (WINDOW_WANTS_MODELINE_P (w
)
552 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
555 /* We're somewhere on the mode line. We consider the place
556 between mode lines of horizontally adjacent mode lines
557 as the vertical border. If scroll bars on the left,
558 return the right window. */
561 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
563 if (abs (*x
- x0
) < grabbable_width
)
564 part
= ON_VERTICAL_BORDER
;
566 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
567 part
= ON_VERTICAL_BORDER
;
569 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
570 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
573 part
= ON_HEADER_LINE
;
575 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
577 if (abs (*x
- x0
) < grabbable_width
)
578 part
= ON_VERTICAL_BORDER
;
580 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < grabbable_width
)
581 part
= ON_VERTICAL_BORDER
;
583 /* Outside anything interesting? */
588 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
591 + FRAME_RIGHT_SCROLL_BAR_WIDTH (f
) * ux
))
595 else if (FRAME_WINDOW_P (f
))
597 if (!w
->pseudo_window_p
598 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
599 && !WINDOW_RIGHTMOST_P (w
)
600 && (abs (*x
- right_x
- fringe_width
) < grabbable_width
))
602 part
= ON_VERTICAL_BORDER
;
604 else if (*x
< left_x
|| *x
> right_x
)
606 /* Other lines than the mode line don't include fringes and
607 scroll bars on the left. */
609 /* Convert X and Y to window-relative pixel coordinates. */
612 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
623 /* Need to say "*x > right_x" rather than >=, since on character
624 terminals, the vertical line's x coordinate is right_x. */
625 if (*x
< left_x
|| *x
> right_x
)
627 /* Other lines than the mode line don't include fringes and
628 scroll bars on the left. */
630 /* Convert X and Y to window-relative pixel coordinates. */
633 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
635 /* Here, too, "*x > right_x" is because of character terminals. */
636 else if (!w
->pseudo_window_p
637 && !WINDOW_RIGHTMOST_P (w
)
638 && *x
> right_x
- ux
)
640 /* On the border on the right side of the window? Assume that
641 this area begins at RIGHT_X minus a canonical char width. */
642 part
= ON_VERTICAL_BORDER
;
646 /* Convert X and Y to window-relative pixel coordinates. */
657 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
658 Scoordinates_in_window_p
, 2, 2, 0,
659 doc
: /* Return non-nil if COORDINATES are in WINDOW.
660 COORDINATES is a cons of the form (X . Y), X and Y being distances
661 measured in characters from the upper-left corner of the frame.
662 \(0 . 0) denotes the character in the upper left corner of the
664 If COORDINATES are in the text portion of WINDOW,
665 the coordinates relative to the window are returned.
666 If they are in the mode line of WINDOW, `mode-line' is returned.
667 If they are in the top mode line of WINDOW, `header-line' is returned.
668 If they are in the left fringe of WINDOW, `left-fringe' is returned.
669 If they are in the right fringe of WINDOW, `right-fringe' is returned.
670 If they are on the border between WINDOW and its right sibling,
671 `vertical-line' is returned. */)
672 (coordinates
, window
)
673 register Lisp_Object coordinates
, window
;
680 CHECK_LIVE_WINDOW (window
);
681 w
= XWINDOW (window
);
682 f
= XFRAME (w
->frame
);
683 CHECK_CONS (coordinates
);
684 lx
= Fcar (coordinates
);
685 ly
= Fcdr (coordinates
);
686 CHECK_NUMBER_OR_FLOAT (lx
);
687 CHECK_NUMBER_OR_FLOAT (ly
);
688 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
689 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
691 switch (coordinates_in_window (w
, &x
, &y
))
697 /* X and Y are now window relative pixel coordinates. Convert
698 them to canonical char units before returning them. */
699 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
700 CANON_Y_FROM_PIXEL_Y (f
, y
));
705 case ON_VERTICAL_BORDER
:
706 return Qvertical_line
;
714 case ON_RIGHT_FRINGE
:
715 return Qright_fringe
;
723 /* Callback for foreach_window, used in window_from_coordinates.
724 Check if window W contains coordinates specified by USER_DATA which
725 is actually a pointer to a struct check_window_data CW.
727 Check if window W contains coordinates *CW->x and *CW->y. If it
728 does, return W in *CW->window, as Lisp_Object, and return in
729 *CW->part the part of the window under coordinates *X,*Y. Return
730 zero from this function to stop iterating over windows. */
732 struct check_window_data
739 check_window_containing (w
, user_data
)
743 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
744 enum window_part found
;
747 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
748 if (found
!= ON_NOTHING
)
750 *cw
->part
= found
- 1;
751 XSETWINDOW (*cw
->window
, w
);
759 /* Find the window containing frame-relative pixel position X/Y and
760 return it as a Lisp_Object. If X, Y is on the window's modeline,
761 set *PART to 1; if it is on the separating line between the window
762 and its right sibling, set it to 2; otherwise set it to 0. If
763 there is no window under X, Y return nil and leave *PART
764 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
766 This function was previously implemented with a loop cycling over
767 windows with Fnext_window, and starting with the frame's selected
768 window. It turned out that this doesn't work with an
769 implementation of next_window using Vwindow_list, because
770 FRAME_SELECTED_WINDOW (F) is not always contained in the window
771 tree of F when this function is called asynchronously from
772 note_mouse_highlight. The original loop didn't terminate in this
776 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
783 struct check_window_data cw
;
786 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
787 foreach_window (f
, check_window_containing
, &cw
);
789 /* If not found above, see if it's in the tool bar window, if a tool
793 && WINDOWP (f
->tool_bar_window
)
794 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
795 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
799 window
= f
->tool_bar_window
;
805 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
806 doc
: /* Return window containing coordinates X and Y on FRAME.
807 If omitted, FRAME defaults to the currently selected frame.
808 The top left corner of the frame is considered to be row 0,
811 Lisp_Object x
, y
, frame
;
817 frame
= selected_frame
;
818 CHECK_LIVE_FRAME (frame
);
821 /* Check that arguments are integers or floats. */
822 CHECK_NUMBER_OR_FLOAT (x
);
823 CHECK_NUMBER_OR_FLOAT (y
);
825 return window_from_coordinates (f
,
826 PIXEL_X_FROM_CANON_X (f
, x
),
827 PIXEL_Y_FROM_CANON_Y (f
, y
),
831 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
832 doc
: /* Return current value of point in WINDOW.
833 For a nonselected window, this is the value point would have
834 if that window were selected.
836 Note that, when WINDOW is the selected window and its buffer
837 is also currently selected, the value returned is the same as (point).
838 It would be more strictly correct to return the `top-level' value
839 of point, outside of any save-excursion forms.
840 But that is hard to define. */)
844 register struct window
*w
= decode_window (window
);
846 if (w
== XWINDOW (selected_window
)
847 && current_buffer
== XBUFFER (w
->buffer
))
849 return Fmarker_position (w
->pointm
);
852 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
853 doc
: /* Return position at which display currently starts in WINDOW.
854 This is updated by redisplay or by calling `set-window-start'. */)
858 return Fmarker_position (decode_window (window
)->start
);
861 /* This is text temporarily removed from the doc string below.
863 This function returns nil if the position is not currently known.
864 That happens when redisplay is preempted and doesn't finish.
865 If in that case you want to compute where the end of the window would
866 have been if redisplay had finished, do this:
868 (goto-char (window-start window))
869 (vertical-motion (1- (window-height window)) window)
872 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
873 doc
: /* Return position at which display currently ends in WINDOW.
874 This is updated by redisplay, when it runs to completion.
875 Simply changing the buffer text or setting `window-start'
876 does not update this value.
877 If UPDATE is non-nil, compute the up-to-date position
878 if it isn't already recorded. */)
880 Lisp_Object window
, update
;
883 struct window
*w
= decode_window (window
);
889 #if 0 /* This change broke some things. We should make it later. */
890 /* If we don't know the end position, return nil.
891 The user can compute it with vertical-motion if he wants to.
892 It would be nicer to do it automatically,
893 but that's so slow that it would probably bother people. */
894 if (NILP (w
->window_end_valid
))
899 && ! (! NILP (w
->window_end_valid
)
900 && XFASTINT (w
->last_modified
) >= MODIFF
))
902 struct text_pos startp
;
904 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
906 /* In case W->start is out of the range, use something
907 reasonable. This situation occured when loading a file with
908 `-l' containing a call to `rmail' with subsequent other
909 commands. At the end, W->start happened to be BEG, while
910 rmail had already narrowed the buffer. */
911 if (XMARKER (w
->start
)->charpos
< BEGV
)
912 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
913 else if (XMARKER (w
->start
)->charpos
> ZV
)
914 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
916 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
918 /* Cannot use Fvertical_motion because that function doesn't
919 cope with variable-height lines. */
920 if (b
!= current_buffer
)
922 old_buffer
= current_buffer
;
923 set_buffer_internal (b
);
926 start_display (&it
, w
, startp
);
927 move_it_vertically (&it
, window_box_height (w
));
928 if (it
.current_y
< it
.last_visible_y
)
929 move_it_past_eol (&it
);
930 value
= make_number (IT_CHARPOS (it
));
933 set_buffer_internal (old_buffer
);
936 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
941 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
942 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer. */)
944 Lisp_Object window
, pos
;
946 register struct window
*w
= decode_window (window
);
948 CHECK_NUMBER_COERCE_MARKER (pos
);
949 if (w
== XWINDOW (selected_window
)
950 && XBUFFER (w
->buffer
) == current_buffer
)
953 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
955 /* We have to make sure that redisplay updates the window to show
956 the new value of point. */
957 if (!EQ (window
, selected_window
))
958 ++windows_or_buffers_changed
;
963 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
964 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
965 Optional third arg NOFORCE non-nil inhibits next redisplay
966 from overriding motion of point in order to display at this exact start. */)
967 (window
, pos
, noforce
)
968 Lisp_Object window
, pos
, noforce
;
970 register struct window
*w
= decode_window (window
);
972 CHECK_NUMBER_COERCE_MARKER (pos
);
973 set_marker_restricted (w
->start
, pos
, w
->buffer
);
974 /* this is not right, but much easier than doing what is right. */
975 w
->start_at_line_beg
= Qnil
;
978 w
->update_mode_line
= Qt
;
979 XSETFASTINT (w
->last_modified
, 0);
980 XSETFASTINT (w
->last_overlay_modified
, 0);
981 if (!EQ (window
, selected_window
))
982 windows_or_buffers_changed
++;
987 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
989 doc
: /* Return WINDOW's dedicated object, usually t or nil.
990 See also `set-window-dedicated-p'. */)
994 return decode_window (window
)->dedicated
;
997 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
998 Sset_window_dedicated_p
, 2, 2, 0,
999 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1000 If it is dedicated, Emacs will not automatically change
1001 which buffer appears in it.
1002 The second argument is the new value for the dedication flag;
1003 non-nil means yes. */)
1005 Lisp_Object window
, arg
;
1007 register struct window
*w
= decode_window (window
);
1010 w
->dedicated
= Qnil
;
1014 return w
->dedicated
;
1017 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1019 doc
: /* Return the display-table that WINDOW is using. */)
1023 return decode_window (window
)->display_table
;
1026 /* Get the display table for use on window W. This is either W's
1027 display table or W's buffer's display table. Ignore the specified
1028 tables if they are not valid; if no valid table is specified,
1031 struct Lisp_Char_Table
*
1032 window_display_table (w
)
1035 struct Lisp_Char_Table
*dp
= NULL
;
1037 if (DISP_TABLE_P (w
->display_table
))
1038 dp
= XCHAR_TABLE (w
->display_table
);
1039 else if (BUFFERP (w
->buffer
))
1041 struct buffer
*b
= XBUFFER (w
->buffer
);
1043 if (DISP_TABLE_P (b
->display_table
))
1044 dp
= XCHAR_TABLE (b
->display_table
);
1045 else if (DISP_TABLE_P (Vstandard_display_table
))
1046 dp
= XCHAR_TABLE (Vstandard_display_table
);
1052 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1053 doc
: /* Set WINDOW's display-table to TABLE. */)
1055 register Lisp_Object window
, table
;
1057 register struct window
*w
;
1059 w
= decode_window (window
);
1060 w
->display_table
= table
;
1064 /* Record info on buffer window w is displaying
1065 when it is about to cease to display that buffer. */
1068 register struct window
*w
;
1075 if (b
!= XMARKER (w
->pointm
)->buffer
)
1079 if (w
== XWINDOW (selected_window
)
1080 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1081 /* Do this except when the selected window's buffer
1082 is being removed from some other window. */
1084 /* last_window_start records the start position that this buffer
1085 had in the last window to be disconnected from it.
1086 Now that this statement is unconditional,
1087 it is possible for the buffer to be displayed in the
1088 selected window, while last_window_start reflects another
1089 window which was recently showing the same buffer.
1090 Some people might say that might be a good thing. Let's see. */
1091 b
->last_window_start
= marker_position (w
->start
);
1093 /* Point in the selected window's buffer
1094 is actually stored in that buffer, and the window's pointm isn't used.
1095 So don't clobber point in that buffer. */
1096 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1097 /* This line helps to fix Horsley's testbug.el bug. */
1098 && !(WINDOWP (b
->last_selected_window
)
1099 && w
!= XWINDOW (b
->last_selected_window
)
1100 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1101 temp_set_point_both (b
,
1102 clip_to_bounds (BUF_BEGV (b
),
1103 XMARKER (w
->pointm
)->charpos
,
1105 clip_to_bounds (BUF_BEGV_BYTE (b
),
1106 marker_byte_position (w
->pointm
),
1109 if (WINDOWP (b
->last_selected_window
)
1110 && w
== XWINDOW (b
->last_selected_window
))
1111 b
->last_selected_window
= Qnil
;
1114 /* Put replacement into the window structure in place of old. */
1116 replace_window (old
, replacement
)
1117 Lisp_Object old
, replacement
;
1119 register Lisp_Object tem
;
1120 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1122 /* If OLD is its frame's root_window, then replacement is the new
1123 root_window for that frame. */
1125 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1126 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1130 p
->width
= o
->width
;
1131 p
->height
= o
->height
;
1132 p
->desired_matrix
= p
->current_matrix
= 0;
1134 bzero (&p
->cursor
, sizeof (p
->cursor
));
1135 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1136 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1137 p
->phys_cursor_type
= -1;
1138 p
->must_be_updated_p
= 0;
1139 p
->pseudo_window_p
= 0;
1140 XSETFASTINT (p
->window_end_vpos
, 0);
1141 XSETFASTINT (p
->window_end_pos
, 0);
1142 p
->window_end_valid
= Qnil
;
1143 p
->frozen_window_start_p
= 0;
1144 p
->orig_top
= p
->orig_height
= Qnil
;
1146 p
->next
= tem
= o
->next
;
1148 XWINDOW (tem
)->prev
= replacement
;
1150 p
->prev
= tem
= o
->prev
;
1152 XWINDOW (tem
)->next
= replacement
;
1154 p
->parent
= tem
= o
->parent
;
1157 if (EQ (XWINDOW (tem
)->vchild
, old
))
1158 XWINDOW (tem
)->vchild
= replacement
;
1159 if (EQ (XWINDOW (tem
)->hchild
, old
))
1160 XWINDOW (tem
)->hchild
= replacement
;
1163 /*** Here, if replacement is a vertical combination
1164 and so is its new parent, we should make replacement's
1165 children be children of that parent instead. ***/
1168 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1169 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1171 register Lisp_Object window
;
1173 delete_window (window
);
1175 if (! NILP (Vwindow_configuration_change_hook
)
1176 && ! NILP (Vrun_hooks
))
1177 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1183 delete_window (window
)
1184 register Lisp_Object window
;
1186 register Lisp_Object tem
, parent
, sib
;
1187 register struct window
*p
;
1188 register struct window
*par
;
1191 /* Because this function is called by other C code on non-leaf
1192 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1193 so we can't decode_window here. */
1195 window
= selected_window
;
1197 CHECK_WINDOW (window
);
1198 p
= XWINDOW (window
);
1200 /* It's okay to delete an already-deleted window. */
1201 if (NILP (p
->buffer
)
1203 && NILP (p
->vchild
))
1208 error ("Attempt to delete minibuffer or sole ordinary window");
1209 par
= XWINDOW (parent
);
1211 windows_or_buffers_changed
++;
1212 Vwindow_list
= Qnil
;
1213 f
= XFRAME (WINDOW_FRAME (p
));
1214 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1216 /* Are we trying to delete any frame's selected window? */
1218 Lisp_Object pwindow
;
1220 /* See if the frame's selected window is either WINDOW
1221 or any subwindow of it, by finding all that window's parents
1222 and comparing each one with WINDOW. */
1223 pwindow
= FRAME_SELECTED_WINDOW (f
);
1225 while (!NILP (pwindow
))
1227 if (EQ (window
, pwindow
))
1229 pwindow
= XWINDOW (pwindow
)->parent
;
1232 if (EQ (window
, pwindow
))
1234 Lisp_Object alternative
;
1235 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1237 /* If we're about to delete the selected window on the
1238 selected frame, then we should use Fselect_window to select
1239 the new window. On the other hand, if we're about to
1240 delete the selected window on any other frame, we shouldn't do
1241 anything but set the frame's selected_window slot. */
1242 if (EQ (window
, selected_window
))
1243 Fselect_window (alternative
);
1245 FRAME_SELECTED_WINDOW (f
) = alternative
;
1250 /* tem is null for dummy parent windows
1251 (which have inferiors but not any contents themselves) */
1255 unchain_marker (p
->pointm
);
1256 unchain_marker (p
->start
);
1259 /* Free window glyph matrices. It is sure that they are allocated
1260 again when ADJUST_GLYPHS is called. Block input so that expose
1261 events and other events that access glyph matrices are not
1262 processed while we are changing them. */
1264 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1268 XWINDOW (tem
)->prev
= p
->prev
;
1272 XWINDOW (tem
)->next
= p
->next
;
1274 if (EQ (window
, par
->hchild
))
1275 par
->hchild
= p
->next
;
1276 if (EQ (window
, par
->vchild
))
1277 par
->vchild
= p
->next
;
1279 /* Find one of our siblings to give our space to. */
1283 /* If p gives its space to its next sibling, that sibling needs
1284 to have its top/left side pulled back to where p's is.
1285 set_window_{height,width} will re-position the sibling's
1288 XWINDOW (sib
)->top
= p
->top
;
1289 XWINDOW (sib
)->left
= p
->left
;
1292 /* Stretch that sibling. */
1293 if (!NILP (par
->vchild
))
1294 set_window_height (sib
,
1295 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1297 if (!NILP (par
->hchild
))
1298 set_window_width (sib
,
1299 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1302 /* If parent now has only one child,
1303 put the child into the parent's place. */
1307 if (NILP (XWINDOW (tem
)->next
))
1308 replace_window (parent
, tem
);
1310 /* Since we may be deleting combination windows, we must make sure that
1311 not only p but all its children have been marked as deleted. */
1312 if (! NILP (p
->hchild
))
1313 delete_all_subwindows (XWINDOW (p
->hchild
));
1314 else if (! NILP (p
->vchild
))
1315 delete_all_subwindows (XWINDOW (p
->vchild
));
1317 /* Mark this window as deleted. */
1318 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1320 /* Adjust glyph matrices. */
1327 /***********************************************************************
1329 ***********************************************************************/
1331 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1332 pointer. This is a callback function for foreach_window, used in
1333 function window_list. */
1336 add_window_to_list (w
, user_data
)
1340 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1342 XSETWINDOW (window
, w
);
1343 *list
= Fcons (window
, *list
);
1348 /* Return a list of all windows, for use by next_window. If
1349 Vwindow_list is a list, return that list. Otherwise, build a new
1350 list, cache it in Vwindow_list, and return that. */
1355 if (!CONSP (Vwindow_list
))
1359 Vwindow_list
= Qnil
;
1360 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1362 Lisp_Object args
[2];
1364 /* We are visiting windows in canonical order, and add
1365 new windows at the front of args[1], which means we
1366 have to reverse this list at the end. */
1368 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1369 args
[0] = Vwindow_list
;
1370 args
[1] = Fnreverse (args
[1]);
1371 Vwindow_list
= Fnconc (2, args
);
1375 return Vwindow_list
;
1379 /* Value is non-zero if WINDOW satisfies the constraints given by
1380 OWINDOW, MINIBUF and ALL_FRAMES.
1382 MINIBUF t means WINDOW may be minibuffer windows.
1383 `lambda' means WINDOW may not be a minibuffer window.
1384 a window means a specific minibuffer window
1386 ALL_FRAMES t means search all frames,
1387 nil means search just current frame,
1388 `visible' means search just visible frames,
1389 0 means search visible and iconified frames,
1390 a window means search the frame that window belongs to,
1391 a frame means consider windows on that frame, only. */
1394 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1395 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1397 struct window
*w
= XWINDOW (window
);
1398 struct frame
*f
= XFRAME (w
->frame
);
1399 int candidate_p
= 1;
1401 if (!BUFFERP (w
->buffer
))
1403 else if (MINI_WINDOW_P (w
)
1404 && (EQ (minibuf
, Qlambda
)
1405 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1407 /* If MINIBUF is `lambda' don't consider any mini-windows.
1408 If it is a window, consider only that one. */
1411 else if (EQ (all_frames
, Qt
))
1413 else if (NILP (all_frames
))
1415 xassert (WINDOWP (owindow
));
1416 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1418 else if (EQ (all_frames
, Qvisible
))
1420 FRAME_SAMPLE_VISIBILITY (f
);
1421 candidate_p
= FRAME_VISIBLE_P (f
);
1423 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1425 FRAME_SAMPLE_VISIBILITY (f
);
1426 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1428 else if (WINDOWP (all_frames
))
1429 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1430 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1431 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1432 else if (FRAMEP (all_frames
))
1433 candidate_p
= EQ (all_frames
, w
->frame
);
1439 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1440 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1444 decode_next_window_args (window
, minibuf
, all_frames
)
1445 Lisp_Object
*window
, *minibuf
, *all_frames
;
1448 *window
= selected_window
;
1450 CHECK_LIVE_WINDOW (*window
);
1452 /* MINIBUF nil may or may not include minibuffers. Decide if it
1454 if (NILP (*minibuf
))
1455 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1456 else if (!EQ (*minibuf
, Qt
))
1459 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1460 => count none of them, or a specific minibuffer window (the
1461 active one) to count. */
1463 /* ALL_FRAMES nil doesn't specify which frames to include. */
1464 if (NILP (*all_frames
))
1465 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1466 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1468 else if (EQ (*all_frames
, Qvisible
))
1470 else if (XFASTINT (*all_frames
) == 0)
1472 else if (FRAMEP (*all_frames
))
1474 else if (!EQ (*all_frames
, Qt
))
1477 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1478 search just current frame, `visible' meaning search just visible
1479 frames, 0 meaning search visible and iconified frames, or a
1480 window, meaning search the frame that window belongs to, or a
1481 frame, meaning consider windows on that frame, only. */
1485 /* Return the next or previous window of WINDOW in canonical ordering
1486 of windows. NEXT_P non-zero means return the next window. See the
1487 documentation string of next-window for the meaning of MINIBUF and
1491 next_window (window
, minibuf
, all_frames
, next_p
)
1492 Lisp_Object window
, minibuf
, all_frames
;
1495 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1497 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1498 return the first window on the frame. */
1499 if (FRAMEP (all_frames
)
1500 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1501 return Fframe_first_window (all_frames
);
1507 /* Find WINDOW in the list of all windows. */
1508 list
= Fmemq (window
, window_list ());
1510 /* Scan forward from WINDOW to the end of the window list. */
1512 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1513 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1516 /* Scan from the start of the window list up to WINDOW. */
1518 for (list
= Vwindow_list
;
1519 CONSP (list
) && !EQ (XCAR (list
), window
);
1521 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1525 window
= XCAR (list
);
1529 Lisp_Object candidate
, list
;
1531 /* Scan through the list of windows for candidates. If there are
1532 candidate windows in front of WINDOW, the last one of these
1533 is the one we want. If there are candidates following WINDOW
1534 in the list, again the last one of these is the one we want. */
1536 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1538 if (EQ (XCAR (list
), window
))
1540 if (WINDOWP (candidate
))
1543 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1545 candidate
= XCAR (list
);
1548 if (WINDOWP (candidate
))
1556 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1557 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1558 If omitted, WINDOW defaults to the selected window.
1560 Optional second arg MINIBUF t means count the minibuffer window even
1561 if not active. MINIBUF nil or omitted means count the minibuffer iff
1562 it is active. MINIBUF neither t nor nil means not to count the
1563 minibuffer even if it is active.
1565 Several frames may share a single minibuffer; if the minibuffer
1566 counts, all windows on all frames that share that minibuffer count
1567 too. Therefore, `next-window' can be used to iterate through the
1568 set of windows even when the minibuffer is on another frame. If the
1569 minibuffer does not count, only windows from WINDOW's frame count.
1571 Optional third arg ALL-FRAMES t means include windows on all frames.
1572 ALL-FRAMES nil or omitted means cycle within the frames as specified
1573 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1574 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1575 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1576 Anything else means restrict to WINDOW's frame.
1578 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1579 `next-window' to iterate through the entire cycle of acceptable
1580 windows, eventually ending up back at the window you started with.
1581 `previous-window' traverses the same cycle, in the reverse order. */)
1582 (window
, minibuf
, all_frames
)
1583 Lisp_Object window
, minibuf
, all_frames
;
1585 return next_window (window
, minibuf
, all_frames
, 1);
1589 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1590 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1591 If omitted, WINDOW defaults to the selected window.
1593 Optional second arg MINIBUF t means count the minibuffer window even
1594 if not active. MINIBUF nil or omitted means count the minibuffer iff
1595 it is active. MINIBUF neither t nor nil means not to count the
1596 minibuffer even if it is active.
1598 Several frames may share a single minibuffer; if the minibuffer
1599 counts, all windows on all frames that share that minibuffer count
1600 too. Therefore, `previous-window' can be used to iterate through
1601 the set of windows even when the minibuffer is on another frame. If
1602 the minibuffer does not count, only windows from WINDOW's frame count
1604 Optional third arg ALL-FRAMES t means include windows on all frames.
1605 ALL-FRAMES nil or omitted means cycle within the frames as specified
1606 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1607 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1608 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1609 Anything else means restrict to WINDOW's frame.
1611 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1612 `previous-window' to iterate through the entire cycle of acceptable
1613 windows, eventually ending up back at the window you started with.
1614 `next-window' traverses the same cycle, in the reverse order. */)
1615 (window
, minibuf
, all_frames
)
1616 Lisp_Object window
, minibuf
, all_frames
;
1618 return next_window (window
, minibuf
, all_frames
, 0);
1622 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1623 doc
: /* Select the ARG'th different window on this frame.
1624 All windows on current frame are arranged in a cyclic order.
1625 This command selects the window ARG steps away in that order.
1626 A negative ARG moves in the opposite order. If the optional second
1627 argument ALL_FRAMES is non-nil, cycle through all frames. */)
1629 Lisp_Object arg
, all_frames
;
1635 window
= selected_window
;
1637 for (i
= XINT (arg
); i
> 0; --i
)
1638 window
= Fnext_window (window
, Qnil
, all_frames
);
1640 window
= Fprevious_window (window
, Qnil
, all_frames
);
1642 Fselect_window (window
);
1647 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1648 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
1649 FRAME nil or omitted means use the selected frame.
1650 WINDOW nil or omitted means use the selected window.
1651 MINIBUF t means include the minibuffer window, even if it isn't active.
1652 MINIBUF nil or omitted means include the minibuffer window only
1654 MINIBUF neither nil nor t means never include the minibuffer window. */)
1655 (frame
, minibuf
, window
)
1656 Lisp_Object frame
, minibuf
, window
;
1659 window
= selected_window
;
1661 frame
= selected_frame
;
1663 if (!EQ (frame
, XWINDOW (window
)->frame
))
1664 error ("Window is on a different frame");
1666 return window_list_1 (window
, minibuf
, frame
);
1670 /* Return a list of windows in canonical ordering. Arguments are like
1671 for `next-window'. */
1674 window_list_1 (window
, minibuf
, all_frames
)
1675 Lisp_Object window
, minibuf
, all_frames
;
1677 Lisp_Object tail
, list
;
1679 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1682 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1683 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1684 list
= Fcons (XCAR (tail
), list
);
1686 return Fnreverse (list
);
1691 /* Look at all windows, performing an operation specified by TYPE
1693 If FRAMES is Qt, look at all frames;
1694 Qnil, look at just the selected frame;
1695 Qvisible, look at visible frames;
1696 a frame, just look at windows on that frame.
1697 If MINI is non-zero, perform the operation on minibuffer windows too. */
1702 GET_BUFFER_WINDOW
, /* Arg is buffer */
1703 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1704 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1705 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1707 UNSHOW_BUFFER
, /* Arg is buffer */
1712 window_loop (type
, obj
, mini
, frames
)
1713 enum window_loop type
;
1714 Lisp_Object obj
, frames
;
1717 Lisp_Object window
, windows
, best_window
, frame_arg
;
1719 struct gcpro gcpro1
;
1721 /* If we're only looping through windows on a particular frame,
1722 frame points to that frame. If we're looping through windows
1723 on all frames, frame is 0. */
1724 if (FRAMEP (frames
))
1725 f
= XFRAME (frames
);
1726 else if (NILP (frames
))
1727 f
= SELECTED_FRAME ();
1732 frame_arg
= Qlambda
;
1733 else if (XFASTINT (frames
) == 0)
1735 else if (EQ (frames
, Qvisible
))
1740 /* frame_arg is Qlambda to stick to one frame,
1741 Qvisible to consider all visible frames,
1744 /* Pick a window to start with. */
1748 window
= FRAME_SELECTED_WINDOW (f
);
1750 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1752 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1756 for (; CONSP (windows
); windows
= CDR (windows
))
1760 window
= XCAR (windows
);
1761 w
= XWINDOW (window
);
1763 /* Note that we do not pay attention here to whether the frame
1764 is visible, since Fwindow_list skips non-visible frames if
1765 that is desired, under the control of frame_arg. */
1766 if (!MINI_WINDOW_P (w
)
1767 /* For UNSHOW_BUFFER, we must always consider all windows. */
1768 || type
== UNSHOW_BUFFER
1769 || (mini
&& minibuf_level
> 0))
1772 case GET_BUFFER_WINDOW
:
1773 if (EQ (w
->buffer
, obj
)
1774 /* Don't find any minibuffer window
1775 except the one that is currently in use. */
1776 && (MINI_WINDOW_P (w
)
1777 ? EQ (window
, minibuf_window
)
1780 if (NILP (best_window
))
1781 best_window
= window
;
1782 else if (EQ (window
, selected_window
))
1783 /* For compatibility with 20.x, prefer to return
1785 best_window
= window
;
1789 case GET_LRU_WINDOW
:
1790 /* t as arg means consider only full-width windows */
1791 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1793 /* Ignore dedicated windows and minibuffers. */
1794 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1796 if (NILP (best_window
)
1797 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1798 > XFASTINT (w
->use_time
)))
1799 best_window
= window
;
1802 case DELETE_OTHER_WINDOWS
:
1803 if (!EQ (window
, obj
))
1804 Fdelete_window (window
);
1807 case DELETE_BUFFER_WINDOWS
:
1808 if (EQ (w
->buffer
, obj
))
1810 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1812 /* If this window is dedicated, and in a frame of its own,
1814 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1815 && !NILP (w
->dedicated
)
1816 && other_visible_frames (f
))
1818 /* Skip the other windows on this frame.
1819 There might be one, the minibuffer! */
1820 while (CONSP (XCDR (windows
))
1821 && EQ (XWINDOW (XCAR (windows
))->frame
,
1822 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1823 windows
= XCDR (windows
);
1825 /* Now we can safely delete the frame. */
1826 Fdelete_frame (w
->frame
, Qnil
);
1828 else if (NILP (w
->parent
))
1830 /* If we're deleting the buffer displayed in the
1831 only window on the frame, find a new buffer to
1834 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1835 Fset_window_buffer (window
, buffer
);
1836 if (EQ (window
, selected_window
))
1837 Fset_buffer (w
->buffer
);
1840 Fdelete_window (window
);
1844 case GET_LARGEST_WINDOW
:
1846 /* Ignore dedicated windows and minibuffers. */
1847 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1850 if (NILP (best_window
))
1851 best_window
= window
;
1854 struct window
*b
= XWINDOW (best_window
);
1855 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1856 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1857 best_window
= window
;
1863 if (EQ (w
->buffer
, obj
))
1866 struct frame
*f
= XFRAME (w
->frame
);
1868 /* Find another buffer to show in this window. */
1869 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1871 /* If this window is dedicated, and in a frame of its own,
1873 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1874 && !NILP (w
->dedicated
)
1875 && other_visible_frames (f
))
1877 /* Skip the other windows on this frame.
1878 There might be one, the minibuffer! */
1879 while (CONSP (XCDR (windows
))
1880 && EQ (XWINDOW (XCAR (windows
))->frame
,
1881 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1882 windows
= XCDR (windows
);
1884 /* Now we can safely delete the frame. */
1885 Fdelete_frame (w
->frame
, Qnil
);
1889 /* Otherwise show a different buffer in the window. */
1890 w
->dedicated
= Qnil
;
1891 Fset_window_buffer (window
, buffer
);
1892 if (EQ (window
, selected_window
))
1893 Fset_buffer (w
->buffer
);
1898 /* Check for a window that has a killed buffer. */
1899 case CHECK_ALL_WINDOWS
:
1900 if (! NILP (w
->buffer
)
1901 && NILP (XBUFFER (w
->buffer
)->name
))
1905 case WINDOW_LOOP_UNUSED
:
1914 /* Used for debugging. Abort if any window has a dead buffer. */
1917 check_all_windows ()
1919 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1922 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1923 doc
: /* Return the window least recently selected or used for display.
1924 If optional argument FRAME is `visible', search all visible frames.
1925 If FRAME is 0, search all visible and iconified frames.
1926 If FRAME is t, search all frames.
1927 If FRAME is nil, search only the selected frame.
1928 If FRAME is a frame, search only that frame. */)
1932 register Lisp_Object w
;
1933 /* First try for a window that is full-width */
1934 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1935 if (!NILP (w
) && !EQ (w
, selected_window
))
1937 /* If none of them, try the rest */
1938 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1941 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1942 doc
: /* Return the largest window in area.
1943 If optional argument FRAME is `visible', search all visible frames.
1944 If FRAME is 0, search all visible and iconified frames.
1945 If FRAME is t, search all frames.
1946 If FRAME is nil, search only the selected frame.
1947 If FRAME is a frame, search only that frame. */)
1951 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1955 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1956 doc
: /* Return a window currently displaying BUFFER, or nil if none.
1957 If optional argument FRAME is `visible', search all visible frames.
1958 If optional argument FRAME is 0, search all visible and iconified frames.
1959 If FRAME is t, search all frames.
1960 If FRAME is nil, search only the selected frame.
1961 If FRAME is a frame, search only that frame. */)
1963 Lisp_Object buffer
, frame
;
1965 buffer
= Fget_buffer (buffer
);
1966 if (BUFFERP (buffer
))
1967 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1972 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1974 doc
: /* Make WINDOW (or the selected window) fill its frame.
1975 Only the frame WINDOW is on is affected.
1976 This function tries to reduce display jumps
1977 by keeping the text previously visible in WINDOW
1978 in the same place on the frame. Doing this depends on
1979 the value of (window-start WINDOW), so if calling this function
1980 in a program gives strange scrolling, make sure the window-start
1981 value is reasonable when this function is called. */)
1990 window
= selected_window
;
1992 CHECK_LIVE_WINDOW (window
);
1993 w
= XWINDOW (window
);
1995 startpos
= marker_position (w
->start
);
1996 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
1998 if (MINI_WINDOW_P (w
) && top
> 0)
1999 error ("Can't expand minibuffer to full frame");
2001 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2003 /* Try to minimize scrolling, by setting the window start to the point
2004 will cause the text at the old window start to be at the same place
2005 on the frame. But don't try to do this if the window start is
2006 outside the visible portion (as might happen when the display is
2007 not current, due to typeahead). */
2008 new_top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2010 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2011 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2013 struct position pos
;
2014 struct buffer
*obuf
= current_buffer
;
2016 Fset_buffer (w
->buffer
);
2017 /* This computation used to temporarily move point, but that can
2018 have unwanted side effects due to text properties. */
2019 pos
= *vmotion (startpos
, -top
, w
);
2021 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2022 w
->window_end_valid
= Qnil
;
2023 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2024 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2026 /* We need to do this, so that the window-scroll-functions
2028 w
->optional_new_start
= Qt
;
2030 set_buffer_internal (obuf
);
2036 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2037 1, 2, "bDelete windows on (buffer): ",
2038 doc
: /* Delete all windows showing BUFFER.
2039 Optional second argument FRAME controls which frames are affected.
2040 If optional argument FRAME is `visible', search all visible frames.
2041 If FRAME is 0, search all visible and iconified frames.
2042 If FRAME is nil, search all frames.
2043 If FRAME is t, search only the selected frame.
2044 If FRAME is a frame, search only that frame. */)
2046 Lisp_Object buffer
, frame
;
2048 /* FRAME uses t and nil to mean the opposite of what window_loop
2052 else if (EQ (frame
, Qt
))
2057 buffer
= Fget_buffer (buffer
);
2058 CHECK_BUFFER (buffer
);
2059 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2065 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2066 Sreplace_buffer_in_windows
,
2067 1, 1, "bReplace buffer in windows: ",
2068 doc
: /* Replace BUFFER with some other buffer in all windows showing it. */)
2074 buffer
= Fget_buffer (buffer
);
2075 CHECK_BUFFER (buffer
);
2076 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2081 /* Replace BUFFER with some other buffer in all windows
2082 of all frames, even those on other keyboards. */
2085 replace_buffer_in_all_windows (buffer
)
2089 Lisp_Object tail
, frame
;
2091 /* A single call to window_loop won't do the job
2092 because it only considers frames on the current keyboard.
2093 So loop manually over frames, and handle each one. */
2094 FOR_EACH_FRAME (tail
, frame
)
2095 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2097 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2101 /* Set the height of WINDOW and all its inferiors. */
2103 /* The smallest acceptable dimensions for a window. Anything smaller
2104 might crash Emacs. */
2106 #define MIN_SAFE_WINDOW_WIDTH (2)
2107 #define MIN_SAFE_WINDOW_HEIGHT (2)
2109 /* Make sure that window_min_height and window_min_width are
2110 not too small; if they are, set them to safe minima. */
2113 check_min_window_sizes ()
2115 /* Smaller values might permit a crash. */
2116 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2117 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2118 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2119 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2122 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2123 minimum allowable size. */
2126 check_frame_size (frame
, rows
, cols
)
2130 /* For height, we have to see:
2131 whether the frame has a minibuffer,
2132 whether it wants a mode line, and
2133 whether it has a menu bar. */
2135 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2136 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2137 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2139 if (FRAME_TOP_MARGIN (frame
) > 0)
2140 min_height
+= FRAME_TOP_MARGIN (frame
);
2142 if (*rows
< min_height
)
2144 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2145 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2149 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2150 check if W's width can be changed, otherwise check W's height.
2151 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2152 siblings, too. If none of the siblings is resizable, WINDOW isn't
2156 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2158 int width_p
, check_siblings_p
;
2163 if (!NILP (w
->hchild
))
2165 c
= XWINDOW (w
->hchild
);
2169 /* A horiz. combination is fixed-width if all of if its
2171 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2172 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2173 fixed_p
= c
== NULL
;
2177 /* A horiz. combination is fixed-height if one of if its
2179 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2180 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2181 fixed_p
= c
!= NULL
;
2184 else if (!NILP (w
->vchild
))
2186 c
= XWINDOW (w
->vchild
);
2190 /* A vert. combination is fixed-width if one of if its
2192 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2193 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2194 fixed_p
= c
!= NULL
;
2198 /* A vert. combination is fixed-height if all of if its
2200 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2201 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2202 fixed_p
= c
== NULL
;
2205 else if (BUFFERP (w
->buffer
))
2207 if (w
->height_fixed_p
&& !width_p
)
2211 struct buffer
*old
= current_buffer
;
2214 current_buffer
= XBUFFER (w
->buffer
);
2215 val
= find_symbol_value (Qwindow_size_fixed
);
2216 current_buffer
= old
;
2219 if (!EQ (val
, Qunbound
))
2221 fixed_p
= !NILP (val
);
2224 && ((EQ (val
, Qheight
) && width_p
)
2225 || (EQ (val
, Qwidth
) && !width_p
)))
2230 /* Can't tell if this one is resizable without looking at
2231 siblings. If all siblings are fixed-size this one is too. */
2232 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2236 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2237 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2241 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2242 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2256 /* Return the minimum size of window W, not taking fixed-width windows
2257 into account. WIDTH_P non-zero means return the minimum width,
2258 otherwise return the minimum height. If W is a combination window,
2259 compute the minimum size from the minimum sizes of W's children. */
2262 window_min_size_1 (w
, width_p
)
2269 if (!NILP (w
->hchild
))
2271 c
= XWINDOW (w
->hchild
);
2276 /* The min width of a horizontal combination is
2277 the sum of the min widths of its children. */
2280 size
+= window_min_size_1 (c
, width_p
);
2281 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2286 /* The min height a horizontal combination equals
2287 the maximum of all min height of its children. */
2290 int min_size
= window_min_size_1 (c
, width_p
);
2291 size
= max (min_size
, size
);
2292 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2296 else if (!NILP (w
->vchild
))
2298 c
= XWINDOW (w
->vchild
);
2303 /* The min width of a vertical combination is
2304 the maximum of the min widths of its children. */
2307 int min_size
= window_min_size_1 (c
, width_p
);
2308 size
= max (min_size
, size
);
2309 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2314 /* The min height of a vertical combination equals
2315 the sum of the min height of its children. */
2318 size
+= window_min_size_1 (c
, width_p
);
2319 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2326 size
= window_min_width
;
2329 if (MINI_WINDOW_P (w
)
2330 || (!WINDOW_WANTS_MODELINE_P (w
)
2331 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2334 size
= window_min_height
;
2342 /* Return the minimum size of window W, taking fixed-size windows into
2343 account. WIDTH_P non-zero means return the minimum width,
2344 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2345 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2346 unless FIXED is null. */
2349 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2351 int width_p
, ignore_fixed_p
, *fixed
;
2358 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2364 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2366 size
= window_min_size_1 (w
, width_p
);
2372 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2373 WINDOW's width. Resize WINDOW's children, if any, so that they
2374 keep their proportionate size relative to WINDOW. Propagate
2375 WINDOW's top or left edge position to children. Delete windows
2376 that become too small unless NODELETE_P is non-zero. */
2379 size_window (window
, size
, width_p
, nodelete_p
)
2381 int size
, width_p
, nodelete_p
;
2383 struct window
*w
= XWINDOW (window
);
2385 Lisp_Object child
, *forward
, *sideward
;
2386 int old_size
, min_size
;
2388 check_min_window_sizes ();
2389 size
= max (0, size
);
2391 /* If the window has been "too small" at one point,
2392 don't delete it for being "too small" in the future.
2393 Preserve it as long as that is at all possible. */
2396 old_size
= XINT (w
->width
);
2397 min_size
= window_min_width
;
2401 old_size
= XINT (w
->height
);
2402 min_size
= window_min_height
;
2405 if (old_size
< min_size
)
2406 w
->too_small_ok
= Qt
;
2408 /* Maybe delete WINDOW if it's too small. */
2409 if (!nodelete_p
&& !NILP (w
->parent
))
2411 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2412 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2414 min_size
= width_p
? window_min_width
: window_min_height
;
2416 if (size
< min_size
)
2418 delete_window (window
);
2423 /* Set redisplay hints. */
2424 w
->last_modified
= make_number (0);
2425 w
->last_overlay_modified
= make_number (0);
2426 windows_or_buffers_changed
++;
2427 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2431 sideward
= &w
->vchild
;
2432 forward
= &w
->hchild
;
2433 w
->width
= make_number (size
);
2437 sideward
= &w
->hchild
;
2438 forward
= &w
->vchild
;
2439 w
->height
= make_number (size
);
2440 w
->orig_height
= Qnil
;
2443 if (!NILP (*sideward
))
2445 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2447 c
= XWINDOW (child
);
2452 size_window (child
, size
, width_p
, nodelete_p
);
2455 else if (!NILP (*forward
))
2457 int fixed_size
, each
, extra
, n
;
2458 int resize_fixed_p
, nfixed
;
2459 int last_pos
, first_pos
, nchildren
, total
;
2461 /* Determine the fixed-size portion of the this window, and the
2462 number of child windows. */
2463 fixed_size
= nchildren
= nfixed
= total
= 0;
2464 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2468 c
= XWINDOW (child
);
2469 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2470 total
+= child_size
;
2472 if (window_fixed_size_p (c
, width_p
, 0))
2474 fixed_size
+= child_size
;
2479 /* If the new size is smaller than fixed_size, or if there
2480 aren't any resizable windows, allow resizing fixed-size
2482 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2484 /* Compute how many lines/columns to add to each child. The
2485 value of extra takes care of rounding errors. */
2486 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2487 each
= (size
- total
) / n
;
2488 extra
= (size
- total
) - n
* each
;
2490 /* Compute new children heights and edge positions. */
2491 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2492 last_pos
= first_pos
;
2493 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2495 int new_size
, old_size
;
2497 c
= XWINDOW (child
);
2498 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2499 new_size
= old_size
;
2501 /* The top or left edge position of this child equals the
2502 bottom or right edge of its predecessor. */
2504 c
->left
= make_number (last_pos
);
2506 c
->top
= make_number (last_pos
);
2508 /* If this child can be resized, do it. */
2509 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2511 new_size
= old_size
+ each
+ extra
;
2515 /* Set new height. Note that size_window also propagates
2516 edge positions to children, so it's not a no-op if we
2517 didn't change the child's size. */
2518 size_window (child
, new_size
, width_p
, 1);
2520 /* Remember the bottom/right edge position of this child; it
2521 will be used to set the top/left edge of the next child. */
2522 last_pos
+= new_size
;
2525 /* We should have covered the parent exactly with child windows. */
2526 xassert (size
== last_pos
- first_pos
);
2528 /* Now delete any children that became too small. */
2530 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2533 c
= XWINDOW (child
);
2534 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2535 size_window (child
, child_size
, width_p
, 0);
2540 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2541 WINDOW's children. NODELETE non-zero means don't delete windows
2542 that become too small in the process. (The caller should check
2543 later and do so if appropriate.) */
2546 set_window_height (window
, height
, nodelete
)
2551 size_window (window
, height
, 0, nodelete
);
2555 /* Set WINDOW's width to WIDTH, and recursively change the width of
2556 WINDOW's children. NODELETE non-zero means don't delete windows
2557 that become too small in the process. (The caller should check
2558 later and do so if appropriate.) */
2561 set_window_width (window
, width
, nodelete
)
2566 size_window (window
, width
, 1, nodelete
);
2570 int window_select_count
;
2573 Fset_window_buffer_unwind (obuf
)
2581 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2582 means it's allowed to run hooks. See make_frame for a case where
2583 it's not allowed. */
2586 set_window_buffer (window
, buffer
, run_hooks_p
)
2587 Lisp_Object window
, buffer
;
2590 struct window
*w
= XWINDOW (window
);
2591 struct buffer
*b
= XBUFFER (buffer
);
2592 int count
= specpdl_ptr
- specpdl
;
2596 if (EQ (window
, selected_window
))
2597 b
->last_selected_window
= window
;
2599 /* Update time stamps of buffer display. */
2600 if (INTEGERP (b
->display_count
))
2601 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2602 b
->display_time
= Fcurrent_time ();
2604 XSETFASTINT (w
->window_end_pos
, 0);
2605 XSETFASTINT (w
->window_end_vpos
, 0);
2606 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2607 w
->window_end_valid
= Qnil
;
2608 w
->hscroll
= w
->min_hscroll
= make_number (0);
2610 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2611 set_marker_restricted (w
->start
,
2612 make_number (b
->last_window_start
),
2614 w
->start_at_line_beg
= Qnil
;
2615 w
->force_start
= Qnil
;
2616 XSETFASTINT (w
->last_modified
, 0);
2617 XSETFASTINT (w
->last_overlay_modified
, 0);
2618 windows_or_buffers_changed
++;
2620 /* We must select BUFFER for running the window-scroll-functions.
2621 If WINDOW is selected, switch permanently.
2622 Otherwise, switch but go back to the ambient buffer afterward. */
2623 if (EQ (window
, selected_window
))
2624 Fset_buffer (buffer
);
2625 /* We can't check ! NILP (Vwindow_scroll_functions) here
2626 because that might itself be a local variable. */
2627 else if (window_initialized
)
2629 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2630 Fset_buffer (buffer
);
2633 /* Set left and right marginal area width from buffer. */
2634 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2638 if (! NILP (Vwindow_scroll_functions
))
2639 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2640 Fmarker_position (w
->start
));
2642 if (! NILP (Vwindow_configuration_change_hook
)
2643 && ! NILP (Vrun_hooks
))
2644 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2647 unbind_to (count
, Qnil
);
2651 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2652 doc
: /* Make WINDOW display BUFFER as its contents.
2653 BUFFER can be a buffer or buffer name. */)
2655 register Lisp_Object window
, buffer
;
2657 register Lisp_Object tem
;
2658 register struct window
*w
= decode_window (window
);
2660 XSETWINDOW (window
, w
);
2661 buffer
= Fget_buffer (buffer
);
2662 CHECK_BUFFER (buffer
);
2664 if (NILP (XBUFFER (buffer
)->name
))
2665 error ("Attempt to display deleted buffer");
2669 error ("Window is deleted");
2670 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2671 is first being set up. */
2673 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2674 error ("Window is dedicated to `%s'",
2675 XSTRING (XBUFFER (tem
)->name
)->data
);
2680 set_window_buffer (window
, buffer
, 1);
2684 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2685 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
2686 If WINDOW is not already selected, also make WINDOW's buffer current.
2687 Note that the main editor command loop
2688 selects the buffer of the selected window before each command. */)
2690 register Lisp_Object window
;
2692 return select_window_1 (window
, 1);
2695 /* Note that selected_window can be nil
2696 when this is called from Fset_window_configuration. */
2699 select_window_1 (window
, recordflag
)
2700 register Lisp_Object window
;
2703 register struct window
*w
;
2704 register struct window
*ow
;
2707 CHECK_LIVE_WINDOW (window
);
2709 w
= XWINDOW (window
);
2710 w
->frozen_window_start_p
= 0;
2712 XSETFASTINT (w
->use_time
, ++window_select_count
);
2713 if (EQ (window
, selected_window
))
2716 if (!NILP (selected_window
))
2718 ow
= XWINDOW (selected_window
);
2719 if (! NILP (ow
->buffer
))
2720 set_marker_both (ow
->pointm
, ow
->buffer
,
2721 BUF_PT (XBUFFER (ow
->buffer
)),
2722 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2725 selected_window
= window
;
2726 sf
= SELECTED_FRAME ();
2727 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2729 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2730 /* Use this rather than Fhandle_switch_frame
2731 so that FRAME_FOCUS_FRAME is moved appropriately as we
2732 move around in the state where a minibuffer in a separate
2734 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2737 sf
->selected_window
= window
;
2740 record_buffer (w
->buffer
);
2741 Fset_buffer (w
->buffer
);
2743 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2745 /* Go to the point recorded in the window.
2746 This is important when the buffer is in more
2747 than one window. It also matters when
2748 redisplay_window has altered point after scrolling,
2749 because it makes the change only in the window. */
2751 register int new_point
= marker_position (w
->pointm
);
2752 if (new_point
< BEGV
)
2754 else if (new_point
> ZV
)
2760 windows_or_buffers_changed
++;
2764 /* Deiconify the frame containing the window WINDOW,
2765 unless it is the selected frame;
2768 The reason for the exception for the selected frame
2769 is that it seems better not to change the selected frames visibility
2770 merely because of displaying a different buffer in it.
2771 The deiconification is useful when a buffer gets shown in
2772 another frame that you were not using lately. */
2775 display_buffer_1 (window
)
2778 Lisp_Object frame
= XWINDOW (window
)->frame
;
2779 FRAME_PTR f
= XFRAME (frame
);
2781 FRAME_SAMPLE_VISIBILITY (f
);
2783 if (!EQ (frame
, selected_frame
))
2785 if (FRAME_ICONIFIED_P (f
))
2786 Fmake_frame_visible (frame
);
2787 else if (FRAME_VISIBLE_P (f
))
2788 Fraise_frame (frame
);
2794 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2795 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would be created specially.
2796 The value is actually t if the frame should be called with default frame
2797 parameters, and a list of frame parameters if they were specified.
2798 See `special-display-buffer-names', and `special-display-regexps'. */)
2800 Lisp_Object buffer_name
;
2804 CHECK_STRING (buffer_name
);
2806 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2810 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2814 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2816 Lisp_Object car
= XCAR (tem
);
2818 && fast_string_match (car
, buffer_name
) >= 0)
2820 else if (CONSP (car
)
2821 && STRINGP (XCAR (car
))
2822 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2828 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2829 doc
: /* Returns non-nil if a new buffer named BUFFER-NAME would use the same window.
2830 See `same-window-buffer-names' and `same-window-regexps'. */)
2832 Lisp_Object buffer_name
;
2836 CHECK_STRING (buffer_name
);
2838 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2842 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2846 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2848 Lisp_Object car
= XCAR (tem
);
2850 && fast_string_match (car
, buffer_name
) >= 0)
2852 else if (CONSP (car
)
2853 && STRINGP (XCAR (car
))
2854 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2860 /* Use B so the default is (other-buffer). */
2861 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2862 "BDisplay buffer: \nP",
2863 doc
: /* Make BUFFER appear in some window but don't select it.
2864 BUFFER can be a buffer or a buffer name.
2865 If BUFFER is shown already in some window, just use that one,
2866 unless the window is the selected window and the optional second
2867 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
2868 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
2869 Returns the window displaying BUFFER.
2870 If `display-reuse-frames' is non-nil, and another frame is currently
2871 displaying BUFFER, then simply raise that frame.
2873 The variables `special-display-buffer-names', `special-display-regexps',
2874 `same-window-buffer-names', and `same-window-regexps' customize how certain
2875 buffer names are handled.
2877 If optional argument FRAME is `visible', search all visible frames.
2878 If FRAME is 0, search all visible and iconified frames.
2879 If FRAME is t, search all frames.
2880 If FRAME is a frame, search only that frame.
2881 If FRAME is nil, search only the selected frame
2882 (actually the last nonminibuffer frame),
2883 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
2884 which means search visible and iconified frames.
2886 If `even-window-heights' is non-nil, window heights will be evened out
2887 if displaying the buffer causes two vertically adjacent windows to be
2889 (buffer
, not_this_window
, frame
)
2890 register Lisp_Object buffer
, not_this_window
, frame
;
2892 register Lisp_Object window
, tem
, swp
;
2896 buffer
= Fget_buffer (buffer
);
2897 CHECK_BUFFER (buffer
);
2899 if (!NILP (Vdisplay_buffer_function
))
2900 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2902 if (NILP (not_this_window
)
2903 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2904 return display_buffer_1 (selected_window
);
2906 /* See if the user has specified this buffer should appear
2907 in the selected window. */
2908 if (NILP (not_this_window
))
2910 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2911 if (!NILP (swp
) && !no_switch_window (selected_window
))
2913 Fswitch_to_buffer (buffer
, Qnil
);
2914 return display_buffer_1 (selected_window
);
2918 /* If the user wants pop-up-frames or display-reuse-frames, then
2919 look for a window showing BUFFER on any visible or iconified frame.
2920 Otherwise search only the current frame. */
2923 else if (pop_up_frames
2924 || display_buffer_reuse_frames
2925 || last_nonminibuf_frame
== 0)
2926 XSETFASTINT (tem
, 0);
2928 XSETFRAME (tem
, last_nonminibuf_frame
);
2930 window
= Fget_buffer_window (buffer
, tem
);
2932 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2933 return display_buffer_1 (window
);
2935 /* Certain buffer names get special handling. */
2936 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2938 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2940 return call1 (Vspecial_display_function
, buffer
);
2942 return call2 (Vspecial_display_function
, buffer
, tem
);
2945 /* If there are no frames open that have more than a minibuffer,
2946 we need to create a new frame. */
2947 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2949 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2950 Fset_window_buffer (window
, buffer
);
2951 return display_buffer_1 (window
);
2954 f
= SELECTED_FRAME ();
2956 || FRAME_MINIBUF_ONLY_P (f
)
2957 /* If the current frame is a special display frame,
2958 don't try to reuse its windows. */
2959 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2964 if (FRAME_MINIBUF_ONLY_P (f
))
2965 XSETFRAME (frames
, last_nonminibuf_frame
);
2966 /* Don't try to create a window if would get an error */
2967 if (split_height_threshold
< window_min_height
<< 1)
2968 split_height_threshold
= window_min_height
<< 1;
2970 /* Note that both Fget_largest_window and Fget_lru_window
2971 ignore minibuffers and dedicated windows.
2972 This means they can return nil. */
2974 /* If the frame we would try to split cannot be split,
2975 try other frames. */
2976 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2978 /* Try visible frames first. */
2979 window
= Fget_largest_window (Qvisible
);
2980 /* If that didn't work, try iconified frames. */
2982 window
= Fget_largest_window (make_number (0));
2984 window
= Fget_largest_window (Qt
);
2987 window
= Fget_largest_window (frames
);
2989 /* If we got a tall enough full-width window that can be split,
2992 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2993 && window_height (window
) >= split_height_threshold
2994 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2995 window
= Fsplit_window (window
, Qnil
, Qnil
);
2998 Lisp_Object upper
, lower
, other
;
3000 window
= Fget_lru_window (frames
);
3001 /* If the LRU window is selected, and big enough,
3002 and can be split, split it. */
3004 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3005 && (EQ (window
, selected_window
)
3006 || EQ (XWINDOW (window
)->parent
, Qnil
))
3007 && window_height (window
) >= window_min_height
<< 1)
3008 window
= Fsplit_window (window
, Qnil
, Qnil
);
3009 /* If Fget_lru_window returned nil, try other approaches. */
3011 /* Try visible frames first. */
3013 window
= Fget_buffer_window (buffer
, Qvisible
);
3015 window
= Fget_largest_window (Qvisible
);
3016 /* If that didn't work, try iconified frames. */
3018 window
= Fget_buffer_window (buffer
, make_number (0));
3020 window
= Fget_largest_window (make_number (0));
3021 /* Try invisible frames. */
3023 window
= Fget_buffer_window (buffer
, Qt
);
3025 window
= Fget_largest_window (Qt
);
3026 /* As a last resort, make a new frame. */
3028 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3029 /* If window appears above or below another,
3030 even out their heights. */
3031 other
= upper
= lower
= Qnil
;
3032 if (!NILP (XWINDOW (window
)->prev
))
3033 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3034 if (!NILP (XWINDOW (window
)->next
))
3035 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3037 && !NILP (Veven_window_heights
)
3038 /* Check that OTHER and WINDOW are vertically arrayed. */
3039 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3040 && (XFASTINT (XWINDOW (other
)->height
)
3041 > XFASTINT (XWINDOW (window
)->height
)))
3043 int total
= (XFASTINT (XWINDOW (other
)->height
)
3044 + XFASTINT (XWINDOW (window
)->height
));
3045 enlarge_window (upper
,
3046 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3052 window
= Fget_lru_window (Qnil
);
3054 Fset_window_buffer (window
, buffer
);
3055 return display_buffer_1 (window
);
3059 temp_output_buffer_show (buf
)
3060 register Lisp_Object buf
;
3062 register struct buffer
*old
= current_buffer
;
3063 register Lisp_Object window
;
3064 register struct window
*w
;
3066 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3069 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3073 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3074 set_buffer_internal (old
);
3076 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3077 call1 (Vtemp_buffer_show_function
, buf
);
3080 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3082 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3083 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3084 Vminibuf_scroll_window
= window
;
3085 w
= XWINDOW (window
);
3086 XSETFASTINT (w
->hscroll
, 0);
3087 XSETFASTINT (w
->min_hscroll
, 0);
3088 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3089 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3091 /* Run temp-buffer-show-hook, with the chosen window selected
3092 and it sbuffer current. */
3093 if (!NILP (Vrun_hooks
))
3096 tem
= Fboundp (Qtemp_buffer_show_hook
);
3099 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3102 int count
= specpdl_ptr
- specpdl
;
3103 Lisp_Object prev_window
;
3104 prev_window
= selected_window
;
3106 /* Select the window that was chosen, for running the hook. */
3107 record_unwind_protect (Fselect_window
, prev_window
);
3108 select_window_1 (window
, 0);
3109 Fset_buffer (w
->buffer
);
3110 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3111 select_window_1 (prev_window
, 0);
3112 unbind_to (count
, Qnil
);
3120 make_dummy_parent (window
)
3124 register struct window
*o
, *p
;
3127 o
= XWINDOW (window
);
3128 p
= allocate_window ();
3129 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3130 ((struct Lisp_Vector
*) p
)->contents
[i
]
3131 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3132 XSETWINDOW (new, p
);
3134 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3136 /* Put new into window structure in place of window */
3137 replace_window (window
, new);
3150 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3151 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3152 WINDOW defaults to selected one and SIZE to half its size.
3153 If optional third arg HORFLAG is non-nil, split side by side
3154 and put SIZE columns in the first of the pair. In that case,
3155 SIZE includes that window's scroll bar, or the divider column to its right. */)
3156 (window
, size
, horflag
)
3157 Lisp_Object window
, size
, horflag
;
3159 register Lisp_Object
new;
3160 register struct window
*o
, *p
;
3162 register int size_int
;
3165 window
= selected_window
;
3167 CHECK_LIVE_WINDOW (window
);
3169 o
= XWINDOW (window
);
3170 fo
= XFRAME (WINDOW_FRAME (o
));
3174 if (!NILP (horflag
))
3175 /* Calculate the size of the left-hand window, by dividing
3176 the usable space in columns by two.
3177 We round up, since the left-hand window may include
3178 a dividing line, while the right-hand may not. */
3179 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3181 size_int
= XFASTINT (o
->height
) >> 1;
3185 CHECK_NUMBER (size
);
3186 size_int
= XINT (size
);
3189 if (MINI_WINDOW_P (o
))
3190 error ("Attempt to split minibuffer window");
3191 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3192 error ("Attempt to split fixed-size window");
3194 check_min_window_sizes ();
3198 if (size_int
< window_min_height
)
3199 error ("Window height %d too small (after splitting)", size_int
);
3200 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3201 error ("Window height %d too small (after splitting)",
3202 XFASTINT (o
->height
) - size_int
);
3203 if (NILP (o
->parent
)
3204 || NILP (XWINDOW (o
->parent
)->vchild
))
3206 make_dummy_parent (window
);
3208 XWINDOW (new)->vchild
= window
;
3213 if (size_int
< window_min_width
)
3214 error ("Window width %d too small (after splitting)", size_int
);
3216 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3217 error ("Window width %d too small (after splitting)",
3218 XFASTINT (o
->width
) - size_int
);
3219 if (NILP (o
->parent
)
3220 || NILP (XWINDOW (o
->parent
)->hchild
))
3222 make_dummy_parent (window
);
3224 XWINDOW (new)->hchild
= window
;
3228 /* Now we know that window's parent is a vertical combination
3229 if we are dividing vertically, or a horizontal combination
3230 if we are making side-by-side windows */
3232 windows_or_buffers_changed
++;
3233 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3234 new = make_window ();
3237 p
->frame
= o
->frame
;
3239 if (!NILP (p
->next
))
3240 XWINDOW (p
->next
)->prev
= new;
3243 p
->parent
= o
->parent
;
3245 p
->window_end_valid
= Qnil
;
3246 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3248 /* Apportion the available frame space among the two new windows */
3250 if (!NILP (horflag
))
3252 p
->height
= o
->height
;
3254 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3255 XSETFASTINT (o
->width
, size_int
);
3256 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3261 p
->width
= o
->width
;
3262 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3263 XSETFASTINT (o
->height
, size_int
);
3264 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3267 /* Adjust glyph matrices. */
3269 Fset_window_buffer (new, o
->buffer
);
3273 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3274 doc
: /* Make current window ARG lines bigger.
3275 From program, optional second arg non-nil means grow sideways ARG columns.
3276 Interactively, if an argument is not given, make the window one line bigger. */)
3278 register Lisp_Object arg
, side
;
3281 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3283 if (! NILP (Vwindow_configuration_change_hook
))
3284 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3289 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3290 doc
: /* Make current window ARG lines smaller.
3291 From program, optional second arg non-nil means shrink sideways arg columns.
3292 Interactively, if an argument is not given, make the window one line smaller. */)
3294 register Lisp_Object arg
, side
;
3297 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3299 if (! NILP (Vwindow_configuration_change_hook
))
3300 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3306 window_height (window
)
3309 register struct window
*p
= XWINDOW (window
);
3310 return XFASTINT (p
->height
);
3314 window_width (window
)
3317 register struct window
*p
= XWINDOW (window
);
3318 return XFASTINT (p
->width
);
3323 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3325 #define CURSIZE(w) \
3326 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3329 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3330 increase its width. Siblings of the selected window are resized to
3331 fullfil the size request. If they become too small in the process,
3332 they will be deleted. */
3335 enlarge_window (window
, delta
, widthflag
)
3337 int delta
, widthflag
;
3339 Lisp_Object parent
, next
, prev
;
3343 int (*sizefun
) P_ ((Lisp_Object
))
3344 = widthflag
? window_width
: window_height
;
3345 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3346 = (widthflag
? set_window_width
: set_window_height
);
3348 /* Check values of window_min_width and window_min_height for
3350 check_min_window_sizes ();
3352 /* Give up if this window cannot be resized. */
3353 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3354 error ("Window is not resizable");
3356 /* Find the parent of the selected window. */
3359 p
= XWINDOW (window
);
3365 error ("No other window to side of this one");
3370 ? !NILP (XWINDOW (parent
)->hchild
)
3371 : !NILP (XWINDOW (parent
)->vchild
))
3377 sizep
= &CURSIZE (window
);
3380 register int maxdelta
;
3382 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3383 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3384 - window_min_size (XWINDOW (p
->next
),
3386 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3387 - window_min_size (XWINDOW (p
->prev
),
3389 /* This is a frame with only one window, a minibuffer-only
3390 or a minibufferless frame. */
3393 if (delta
> maxdelta
)
3394 /* This case traps trying to make the minibuffer
3395 the full frame, or make the only window aside from the
3396 minibuffer the full frame. */
3400 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3402 delete_window (window
);
3409 /* Find the total we can get from other siblings. */
3411 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3412 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3414 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3415 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3418 /* If we can get it all from them, do so. */
3419 if (delta
<= maximum
)
3421 Lisp_Object first_unaffected
;
3422 Lisp_Object first_affected
;
3427 first_affected
= window
;
3428 /* Look at one sibling at a time,
3429 moving away from this window in both directions alternately,
3430 and take as much as we can get without deleting that sibling. */
3431 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3435 int this_one
= ((*sizefun
) (next
)
3436 - window_min_size (XWINDOW (next
),
3437 widthflag
, 0, &fixed_p
));
3440 if (this_one
> delta
)
3443 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3444 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3449 next
= XWINDOW (next
)->next
;
3457 int this_one
= ((*sizefun
) (prev
)
3458 - window_min_size (XWINDOW (prev
),
3459 widthflag
, 0, &fixed_p
));
3462 if (this_one
> delta
)
3465 first_affected
= prev
;
3467 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3468 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3473 prev
= XWINDOW (prev
)->prev
;
3477 xassert (delta
== 0);
3479 /* Now recalculate the edge positions of all the windows affected,
3480 based on the new sizes. */
3481 first_unaffected
= next
;
3482 prev
= first_affected
;
3483 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3484 prev
= next
, next
= XWINDOW (next
)->next
)
3486 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3487 /* This does not change size of NEXT,
3488 but it propagates the new top edge to its children */
3489 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3494 register int delta1
;
3495 register int opht
= (*sizefun
) (parent
);
3497 /* If trying to grow this window to or beyond size of the parent,
3498 make delta1 so big that, on shrinking back down,
3499 all the siblings end up with less than one line and are deleted. */
3500 if (opht
<= XINT (*sizep
) + delta
)
3501 delta1
= opht
* opht
* 2;
3504 /* Otherwise, make delta1 just right so that if we add
3505 delta1 lines to this window and to the parent, and then
3506 shrink the parent back to its original size, the new
3507 proportional size of this window will increase by delta.
3509 The function size_window will compute the new height h'
3510 of the window from delta1 as:
3513 x = delta1 - delta1/n * n for the 1st resizable child
3516 where n is the number of children that can be resized.
3517 We can ignore x by choosing a delta1 that is a multiple of
3518 n. We want the height of this window to come out as
3528 The number of children n rquals the number of resizable
3529 children of this window + 1 because we know window itself
3530 is resizable (otherwise we would have signalled an error. */
3532 struct window
*w
= XWINDOW (window
);
3536 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3537 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3539 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3540 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3546 /* Add delta1 lines or columns to this window, and to the parent,
3547 keeping things consistent while not affecting siblings. */
3548 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3549 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3551 /* Squeeze out delta1 lines or columns from our parent,
3552 shriking this window and siblings proportionately.
3553 This brings parent back to correct size.
3554 Delta1 was calculated so this makes this window the desired size,
3555 taking it all out of the siblings. */
3556 (*setsizefun
) (parent
, opht
, 0);
3559 XSETFASTINT (p
->last_modified
, 0);
3560 XSETFASTINT (p
->last_overlay_modified
, 0);
3562 /* Adjust glyph matrices. */
3563 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3571 /***********************************************************************
3572 Resizing Mini-Windows
3573 ***********************************************************************/
3575 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3577 enum save_restore_action
3584 static int save_restore_orig_size
P_ ((struct window
*,
3585 enum save_restore_action
));
3587 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3588 from lowest windows first. */
3591 shrink_window_lowest_first (w
, height
)
3599 xassert (!MINI_WINDOW_P (w
));
3601 /* Set redisplay hints. */
3602 XSETFASTINT (w
->last_modified
, 0);
3603 XSETFASTINT (w
->last_overlay_modified
, 0);
3604 windows_or_buffers_changed
++;
3605 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3607 old_height
= XFASTINT (w
->height
);
3608 XSETFASTINT (w
->height
, height
);
3610 if (!NILP (w
->hchild
))
3612 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3614 c
= XWINDOW (child
);
3616 shrink_window_lowest_first (c
, height
);
3619 else if (!NILP (w
->vchild
))
3621 Lisp_Object last_child
;
3622 int delta
= old_height
- height
;
3627 /* Find the last child. We are taking space from lowest windows
3628 first, so we iterate over children from the last child
3630 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3633 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3634 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3638 c
= XWINDOW (child
);
3639 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3641 if (this_one
> delta
)
3644 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3648 /* Compute new positions. */
3649 last_top
= XINT (w
->top
);
3650 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3652 c
= XWINDOW (child
);
3653 c
->top
= make_number (last_top
);
3654 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3655 last_top
+= XFASTINT (c
->height
);
3661 /* Save, restore, or check positions and sizes in the window tree
3662 rooted at W. ACTION says what to do.
3664 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3665 members are valid for all windows in the window tree. Value is
3666 non-zero if they are valid.
3668 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3669 orig_top and orig_height for all windows in the tree.
3671 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3672 values stored in orig_top and orig_height for all windows. */
3675 save_restore_orig_size (w
, action
)
3677 enum save_restore_action action
;
3683 if (!NILP (w
->hchild
))
3685 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3688 else if (!NILP (w
->vchild
))
3690 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3696 case CHECK_ORIG_SIZES
:
3697 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3701 case SAVE_ORIG_SIZES
:
3702 w
->orig_top
= w
->top
;
3703 w
->orig_height
= w
->height
;
3704 XSETFASTINT (w
->last_modified
, 0);
3705 XSETFASTINT (w
->last_overlay_modified
, 0);
3708 case RESTORE_ORIG_SIZES
:
3709 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3710 w
->top
= w
->orig_top
;
3711 w
->height
= w
->orig_height
;
3712 w
->orig_height
= w
->orig_top
= Qnil
;
3713 XSETFASTINT (w
->last_modified
, 0);
3714 XSETFASTINT (w
->last_overlay_modified
, 0);
3721 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3728 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3729 without deleting other windows. */
3732 grow_mini_window (w
, delta
)
3736 struct frame
*f
= XFRAME (w
->frame
);
3737 struct window
*root
;
3739 xassert (MINI_WINDOW_P (w
));
3740 xassert (delta
>= 0);
3742 /* Check values of window_min_width and window_min_height for
3744 check_min_window_sizes ();
3746 /* Compute how much we can enlarge the mini-window without deleting
3748 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3751 int min_height
= window_min_size (root
, 0, 0, 0);
3752 if (XFASTINT (root
->height
) - delta
< min_height
)
3753 /* Note that the root window may already be smaller than
3755 delta
= max (0, XFASTINT (root
->height
) - min_height
);
3760 /* Save original window sizes and positions, if not already done. */
3761 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3762 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3764 /* Shrink other windows. */
3765 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3767 /* Grow the mini-window. */
3768 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3769 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3770 XSETFASTINT (w
->last_modified
, 0);
3771 XSETFASTINT (w
->last_overlay_modified
, 0);
3778 /* Shrink mini-window W. If there is recorded info about window sizes
3779 before a call to grow_mini_window, restore recorded window sizes.
3780 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3784 shrink_mini_window (w
)
3787 struct frame
*f
= XFRAME (w
->frame
);
3788 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3790 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3792 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3794 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3795 windows_or_buffers_changed
= 1;
3797 else if (XFASTINT (w
->height
) > 1)
3799 /* Distribute the additional lines of the mini-window
3800 among the other windows. */
3802 XSETWINDOW (window
, w
);
3803 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3809 /* Mark window cursors off for all windows in the window tree rooted
3810 at W by setting their phys_cursor_on_p flag to zero. Called from
3811 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3812 the frame are cleared. */
3815 mark_window_cursors_off (w
)
3820 if (!NILP (w
->hchild
))
3821 mark_window_cursors_off (XWINDOW (w
->hchild
));
3822 else if (!NILP (w
->vchild
))
3823 mark_window_cursors_off (XWINDOW (w
->vchild
));
3825 w
->phys_cursor_on_p
= 0;
3827 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3832 /* Return number of lines of text (not counting mode lines) in W. */
3835 window_internal_height (w
)
3838 int ht
= XFASTINT (w
->height
);
3840 if (!MINI_WINDOW_P (w
))
3842 if (!NILP (w
->parent
)
3843 || !NILP (w
->vchild
)
3844 || !NILP (w
->hchild
)
3847 || WINDOW_WANTS_MODELINE_P (w
))
3850 if (WINDOW_WANTS_HEADER_LINE_P (w
))
3858 /* Return the number of columns in W.
3859 Don't count columns occupied by scroll bars or the vertical bar
3860 separating W from the sibling to its right. */
3863 window_internal_width (w
)
3866 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3867 int width
= XINT (w
->width
);
3869 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3870 /* Scroll bars occupy a few columns. */
3871 width
-= FRAME_SCROLL_BAR_COLS (f
);
3872 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3873 /* The column of `|' characters separating side-by-side windows
3874 occupies one column only. */
3877 /* On window-systems, areas to the left and right of the window
3878 are used as fringes. */
3879 if (FRAME_WINDOW_P (f
))
3880 width
-= FRAME_FRINGE_COLS (f
);
3886 /************************************************************************
3888 ***********************************************************************/
3890 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3891 N screen-fulls, which is defined as the height of the window minus
3892 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3893 instead. Negative values of N mean scroll down. NOERROR non-zero
3894 means don't signal an error if we try to move over BEGV or ZV,
3898 window_scroll (window
, n
, whole
, noerror
)
3904 /* If we must, use the pixel-based version which is much slower than
3905 the line-based one but can handle varying line heights. */
3906 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3907 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3909 window_scroll_line_based (window
, n
, whole
, noerror
);
3913 /* Implementation of window_scroll that works based on pixel line
3914 heights. See the comment of window_scroll for parameter
3918 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3925 struct window
*w
= XWINDOW (window
);
3926 struct text_pos start
;
3928 int this_scroll_margin
;
3930 /* True if we fiddled the window vscroll field without really scrolling. */
3933 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3935 /* If PT is not visible in WINDOW, move back one half of
3936 the screen. Allow PT to be partially visible, otherwise
3937 something like (scroll-down 1) with PT in the line before
3938 the partially visible one would recenter. */
3939 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
3942 /* Move backward half the height of the window. Performance note:
3943 vmotion used here is about 10% faster, but would give wrong
3944 results for variable height lines. */
3945 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3946 it
.current_y
= it
.last_visible_y
;
3947 move_it_vertically (&it
, - window_box_height (w
) / 2);
3949 /* The function move_iterator_vertically may move over more than
3950 the specified y-distance. If it->w is small, e.g. a
3951 mini-buffer window, we may end up in front of the window's
3952 display area. This is the case when Start displaying at the
3953 start of the line containing PT in this case. */
3954 if (it
.current_y
<= 0)
3956 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3957 move_it_vertically (&it
, 0);
3961 start
= it
.current
.pos
;
3964 /* If scroll_preserve_screen_position is non-zero, we try to set
3965 point in the same window line as it is now, so get that line. */
3966 if (!NILP (Vscroll_preserve_screen_position
))
3968 start_display (&it
, w
, start
);
3969 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3970 preserve_y
= it
.current_y
;
3975 /* Move iterator it from start the specified distance forward or
3976 backward. The result is the new window start. */
3977 start_display (&it
, w
, start
);
3980 int screen_full
= (window_box_height (w
)
3981 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3982 int dy
= n
* screen_full
;
3984 /* Note that move_it_vertically always moves the iterator to the
3985 start of a line. So, if the last line doesn't have a newline,
3986 we would end up at the start of the line ending at ZV. */
3988 move_it_vertically_backward (&it
, -dy
);
3990 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
3991 MOVE_TO_POS
| MOVE_TO_Y
);
3994 move_it_by_lines (&it
, n
, 1);
3996 /* End if we end up at ZV or BEGV. */
3997 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3998 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4000 if (IT_CHARPOS (it
) == ZV
)
4002 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4003 > it
.last_visible_y
)
4005 /* The last line was only partially visible, make it fully
4007 w
->vscroll
= (it
.last_visible_y
4008 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4009 adjust_glyphs (it
.f
);
4014 Fsignal (Qend_of_buffer
, Qnil
);
4018 if (w
->vscroll
!= 0)
4019 /* The first line was only partially visible, make it fully
4025 Fsignal (Qbeginning_of_buffer
, Qnil
);
4028 /* If control gets here, then we vscrolled. */
4030 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4032 /* Don't try to change the window start below. */
4038 /* Set the window start, and set up the window for redisplay. */
4039 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4041 w
->start_at_line_beg
= Fbolp ();
4042 w
->update_mode_line
= Qt
;
4043 XSETFASTINT (w
->last_modified
, 0);
4044 XSETFASTINT (w
->last_overlay_modified
, 0);
4045 /* Set force_start so that redisplay_window will run the
4046 window-scroll-functions. */
4047 w
->force_start
= Qt
;
4050 it
.current_y
= it
.vpos
= 0;
4052 /* Preserve the screen position if we must. */
4053 if (preserve_y
>= 0)
4055 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4056 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4060 /* Move PT out of scroll margins. */
4061 this_scroll_margin
= max (0, scroll_margin
);
4062 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4063 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4067 /* We moved the window start towards ZV, so PT may be now
4068 in the scroll margin at the top. */
4069 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4070 while (it
.current_y
< this_scroll_margin
)
4071 move_it_by_lines (&it
, 1, 1);
4072 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4076 int charpos
, bytepos
;
4078 /* We moved the window start towards BEGV, so PT may be now
4079 in the scroll margin at the bottom. */
4080 move_it_to (&it
, PT
, -1,
4081 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4082 MOVE_TO_POS
| MOVE_TO_Y
);
4084 /* Save our position, in case it's correct. */
4085 charpos
= IT_CHARPOS (it
);
4086 bytepos
= IT_BYTEPOS (it
);
4088 /* See if point is on a partially visible line at the end. */
4089 move_it_by_lines (&it
, 1, 1);
4090 if (it
.current_y
> it
.last_visible_y
)
4091 /* The last line was only partially visible, so back up two
4092 lines to make sure we're on a fully visible line. */
4094 move_it_by_lines (&it
, -2, 0);
4095 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4098 /* No, the position we saved is OK, so use it. */
4099 SET_PT_BOTH (charpos
, bytepos
);
4105 /* Implementation of window_scroll that works based on screen lines.
4106 See the comment of window_scroll for parameter descriptions. */
4109 window_scroll_line_based (window
, n
, whole
, noerror
)
4115 register struct window
*w
= XWINDOW (window
);
4116 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4117 register int pos
, pos_byte
;
4118 register int ht
= window_internal_height (w
);
4119 register Lisp_Object tem
;
4123 struct position posit
;
4126 /* If scrolling screen-fulls, compute the number of lines to
4127 scroll from the window's height. */
4129 n
*= max (1, ht
- next_screen_context_lines
);
4131 startpos
= marker_position (w
->start
);
4133 posit
= *compute_motion (startpos
, 0, 0, 0,
4135 window_internal_width (w
), XINT (w
->hscroll
),
4137 original_vpos
= posit
.vpos
;
4139 XSETFASTINT (tem
, PT
);
4140 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4144 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4149 lose
= n
< 0 && PT
== BEGV
;
4150 Fvertical_motion (make_number (n
), window
);
4154 SET_PT_BOTH (opoint
, opoint_byte
);
4161 Fsignal (Qbeginning_of_buffer
, Qnil
);
4166 int this_scroll_margin
= scroll_margin
;
4168 /* Don't use a scroll margin that is negative or too large. */
4169 if (this_scroll_margin
< 0)
4170 this_scroll_margin
= 0;
4172 if (XINT (w
->height
) < 4 * scroll_margin
)
4173 this_scroll_margin
= XINT (w
->height
) / 4;
4175 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4176 w
->start_at_line_beg
= bolp
;
4177 w
->update_mode_line
= Qt
;
4178 XSETFASTINT (w
->last_modified
, 0);
4179 XSETFASTINT (w
->last_overlay_modified
, 0);
4180 /* Set force_start so that redisplay_window will run
4181 the window-scroll-functions. */
4182 w
->force_start
= Qt
;
4184 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4186 SET_PT_BOTH (pos
, pos_byte
);
4187 Fvertical_motion (make_number (original_vpos
), window
);
4189 /* If we scrolled forward, put point enough lines down
4190 that it is outside the scroll margin. */
4195 if (this_scroll_margin
> 0)
4197 SET_PT_BOTH (pos
, pos_byte
);
4198 Fvertical_motion (make_number (this_scroll_margin
), window
);
4204 if (top_margin
<= opoint
)
4205 SET_PT_BOTH (opoint
, opoint_byte
);
4206 else if (!NILP (Vscroll_preserve_screen_position
))
4208 SET_PT_BOTH (pos
, pos_byte
);
4209 Fvertical_motion (make_number (original_vpos
), window
);
4212 SET_PT (top_margin
);
4218 /* If we scrolled backward, put point near the end of the window
4219 but not within the scroll margin. */
4220 SET_PT_BOTH (pos
, pos_byte
);
4221 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4222 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4225 bottom_margin
= PT
+ 1;
4227 if (bottom_margin
> opoint
)
4228 SET_PT_BOTH (opoint
, opoint_byte
);
4231 if (!NILP (Vscroll_preserve_screen_position
))
4233 SET_PT_BOTH (pos
, pos_byte
);
4234 Fvertical_motion (make_number (original_vpos
), window
);
4237 Fvertical_motion (make_number (-1), window
);
4246 Fsignal (Qend_of_buffer
, Qnil
);
4251 /* Scroll selected_window up or down. If N is nil, scroll a
4252 screen-full which is defined as the height of the window minus
4253 next_screen_context_lines. If N is the symbol `-', scroll.
4254 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4255 up. This is the guts of Fscroll_up and Fscroll_down. */
4258 scroll_command (n
, direction
)
4262 int count
= BINDING_STACK_SIZE ();
4264 xassert (abs (direction
) == 1);
4266 /* If selected window's buffer isn't current, make it current for
4267 the moment. But don't screw up if window_scroll gets an error. */
4268 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4270 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4271 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4273 /* Make redisplay consider other windows than just selected_window. */
4274 ++windows_or_buffers_changed
;
4278 window_scroll (selected_window
, direction
, 1, 0);
4279 else if (EQ (n
, Qminus
))
4280 window_scroll (selected_window
, -direction
, 1, 0);
4283 n
= Fprefix_numeric_value (n
);
4284 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4287 unbind_to (count
, Qnil
);
4290 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4291 doc
: /* Scroll text of current window upward ARG lines; or near full screen if no ARG.
4292 A near full screen is `next-screen-context-lines' less than a full screen.
4293 Negative ARG means scroll downward.
4294 If ARG is the atom `-', scroll downward by nearly full screen.
4295 When calling from a program, supply as argument a number, nil, or `-'. */)
4299 scroll_command (arg
, 1);
4303 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4304 doc
: /* Scroll text of current window down ARG lines; or near full screen if no ARG.
4305 A near full screen is `next-screen-context-lines' less than a full screen.
4306 Negative ARG means scroll upward.
4307 If ARG is the atom `-', scroll upward by nearly full screen.
4308 When calling from a program, supply as argument a number, nil, or `-'. */)
4312 scroll_command (arg
, -1);
4316 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4317 doc
: /* Return the other window for \"other window scroll\" commands.
4318 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4319 specifies the window.
4320 If `other-window-scroll-buffer' is non-nil, a window
4321 showing that buffer is used. */)
4326 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4327 && !NILP (Vminibuf_scroll_window
))
4328 window
= Vminibuf_scroll_window
;
4329 /* If buffer is specified, scroll that buffer. */
4330 else if (!NILP (Vother_window_scroll_buffer
))
4332 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4334 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4338 /* Nothing specified; look for a neighboring window on the same
4340 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4342 if (EQ (window
, selected_window
))
4343 /* That didn't get us anywhere; look for a window on another
4346 window
= Fnext_window (window
, Qnil
, Qt
);
4347 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4348 && ! EQ (window
, selected_window
));
4351 CHECK_LIVE_WINDOW (window
);
4353 if (EQ (window
, selected_window
))
4354 error ("There is no other window");
4359 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4360 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
4361 A near full screen is `next-screen-context-lines' less than a full screen.
4362 The next window is the one below the current one; or the one at the top
4363 if the current one is at the bottom. Negative ARG means scroll downward.
4364 If ARG is the atom `-', scroll downward by nearly full screen.
4365 When calling from a program, supply as argument a number, nil, or `-'.
4367 If in the minibuffer, `minibuffer-scroll-window' if non-nil
4368 specifies the window to scroll.
4369 If `other-window-scroll-buffer' is non-nil, scroll the window
4370 showing that buffer, popping the buffer up if necessary. */)
4376 int count
= BINDING_STACK_SIZE ();
4378 window
= Fother_window_for_scrolling ();
4379 w
= XWINDOW (window
);
4381 /* Don't screw up if window_scroll gets an error. */
4382 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4383 ++windows_or_buffers_changed
;
4385 Fset_buffer (w
->buffer
);
4386 SET_PT (marker_position (w
->pointm
));
4389 window_scroll (window
, 1, 1, 1);
4390 else if (EQ (arg
, Qminus
))
4391 window_scroll (window
, -1, 1, 1);
4397 window_scroll (window
, XINT (arg
), 0, 1);
4400 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4401 unbind_to (count
, Qnil
);
4406 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4407 doc
: /* Scroll selected window display ARG columns left.
4408 Default for ARG is window width minus 2.
4409 Value is the total amount of leftward horizontal scrolling in
4410 effect after the change.
4411 If `automatic-hscrolling' is non-nil, the argument ARG modifies
4412 a lower bound for automatic scrolling, i.e. automatic scrolling
4413 will not scroll a window to a column less than the value returned
4414 by this function. */)
4416 register Lisp_Object arg
;
4420 struct window
*w
= XWINDOW (selected_window
);
4423 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4425 arg
= Fprefix_numeric_value (arg
);
4427 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
4428 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4430 if (interactive_p (0))
4431 w
->min_hscroll
= w
->hscroll
;
4436 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4437 doc
: /* Scroll selected window display ARG columns right.
4438 Default for ARG is window width minus 2.
4439 Value is the total amount of leftward horizontal scrolling in
4440 effect after the change.
4441 If `automatic-hscrolling' is non-nil, the argument ARG modifies
4442 a lower bound for automatic scrolling, i.e. automatic scrolling
4443 will not scroll a window to a column less than the value returned
4444 by this function. */)
4446 register Lisp_Object arg
;
4450 struct window
*w
= XWINDOW (selected_window
);
4453 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4455 arg
= Fprefix_numeric_value (arg
);
4457 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
4458 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4460 if (interactive_p (0))
4461 w
->min_hscroll
= w
->hscroll
;
4466 /* Value is the number of lines actually displayed in window W,
4467 as opposed to its height. */
4470 displayed_window_lines (w
)
4474 struct text_pos start
;
4475 int height
= window_box_height (w
);
4476 struct buffer
*old_buffer
;
4479 if (XBUFFER (w
->buffer
) != current_buffer
)
4481 old_buffer
= current_buffer
;
4482 set_buffer_internal (XBUFFER (w
->buffer
));
4487 /* In case W->start is out of the accessible range, do something
4488 reasonable. This happens in Info mode when Info-scroll-down
4489 calls (recenter -1) while W->start is 1. */
4490 if (XMARKER (w
->start
)->charpos
< BEGV
)
4491 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
4492 else if (XMARKER (w
->start
)->charpos
> ZV
)
4493 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
4495 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4497 start_display (&it
, w
, start
);
4498 move_it_vertically (&it
, height
);
4499 bottom_y
= line_bottom_y (&it
);
4501 /* Add in empty lines at the bottom of the window. */
4502 if (bottom_y
< height
)
4504 int uy
= CANON_Y_UNIT (it
.f
);
4505 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
4509 set_buffer_internal (old_buffer
);
4515 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4516 doc
: /* Center point in window and redisplay frame.
4517 With prefix argument ARG, recenter putting point on screen line ARG
4518 relative to the current window. If ARG is negative, it counts up from the
4519 bottom of the window. (ARG should be less than the height of the window.)
4521 If ARG is omitted or nil, erase the entire frame and then
4522 redraw with point in the center of the current window.
4523 Just C-u as prefix means put point in the center of the window
4524 and redisplay normally--don't erase and redraw the frame. */)
4526 register Lisp_Object arg
;
4528 struct window
*w
= XWINDOW (selected_window
);
4529 struct buffer
*buf
= XBUFFER (w
->buffer
);
4530 struct buffer
*obuf
= current_buffer
;
4532 int charpos
, bytepos
;
4538 /* Invalidate pixel data calculated for all compositions. */
4539 for (i
= 0; i
< n_compositions
; i
++)
4540 composition_table
[i
]->font
= NULL
;
4542 Fredraw_frame (w
->frame
);
4543 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4546 else if (CONSP (arg
)) /* Just C-u. */
4550 arg
= Fprefix_numeric_value (arg
);
4554 set_buffer_internal (buf
);
4556 /* Handle centering on a graphical frame specially. Such frames can
4557 have variable-height lines and centering point on the basis of
4558 line counts would lead to strange effects. */
4559 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
4566 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4567 start_display (&it
, w
, pt
);
4568 move_it_vertically (&it
, - window_box_height (w
) / 2);
4569 charpos
= IT_CHARPOS (it
);
4570 bytepos
= IT_BYTEPOS (it
);
4572 else if (XINT (arg
) < 0)
4576 int y0
, y1
, h
, nlines
;
4578 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4579 start_display (&it
, w
, pt
);
4582 /* The amount of pixels we have to move back is the window
4583 height minus what's displayed in the line containing PT,
4584 and the lines below. */
4585 nlines
= - XINT (arg
) - 1;
4586 move_it_by_lines (&it
, nlines
, 1);
4588 y1
= it
.current_y
- y0
;
4589 h
= line_bottom_y (&it
) - y1
;
4591 /* If we can't move down NLINES lines because we hit
4592 the end of the buffer, count in some empty lines. */
4593 if (it
.vpos
< nlines
)
4594 y1
+= (nlines
- it
.vpos
) * CANON_Y_UNIT (it
.f
);
4596 y0
= it
.last_visible_y
- y1
- h
;
4598 start_display (&it
, w
, pt
);
4599 move_it_vertically (&it
, - y0
);
4600 charpos
= IT_CHARPOS (it
);
4601 bytepos
= IT_BYTEPOS (it
);
4605 struct position pos
;
4606 pos
= *vmotion (PT
, - XINT (arg
), w
);
4607 charpos
= pos
.bufpos
;
4608 bytepos
= pos
.bytepos
;
4613 struct position pos
;
4614 int ht
= window_internal_height (w
);
4617 arg
= make_number (ht
/ 2);
4618 else if (XINT (arg
) < 0)
4619 arg
= make_number (XINT (arg
) + ht
);
4621 pos
= *vmotion (PT
, - XINT (arg
), w
);
4622 charpos
= pos
.bufpos
;
4623 bytepos
= pos
.bytepos
;
4626 /* Set the new window start. */
4627 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4628 w
->window_end_valid
= Qnil
;
4629 w
->force_start
= Qt
;
4630 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4631 w
->start_at_line_beg
= Qt
;
4633 w
->start_at_line_beg
= Qnil
;
4635 set_buffer_internal (obuf
);
4640 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4642 doc
: /* Return the height in lines of the text display area of WINDOW.
4643 This doesn't include the mode-line (or header-line if any) or any
4644 partial-height lines in the text display area. */)
4648 struct window
*w
= decode_window (window
);
4649 int pixel_height
= window_box_height (w
);
4650 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4651 return make_number (line_height
);
4656 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4658 doc
: /* Position point relative to window.
4659 With no argument, position point at center of window.
4660 An argument specifies vertical position within the window;
4661 zero means top of window, negative means relative to bottom of window. */)
4665 struct window
*w
= XWINDOW (selected_window
);
4669 window
= selected_window
;
4670 start
= marker_position (w
->start
);
4671 if (start
< BEGV
|| start
> ZV
)
4673 int height
= window_internal_height (w
);
4674 Fvertical_motion (make_number (- (height
/ 2)), window
);
4675 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4676 w
->start_at_line_beg
= Fbolp ();
4677 w
->force_start
= Qt
;
4680 Fgoto_char (w
->start
);
4682 lines
= displayed_window_lines (w
);
4684 XSETFASTINT (arg
, lines
/ 2);
4687 arg
= Fprefix_numeric_value (arg
);
4689 XSETINT (arg
, XINT (arg
) + lines
);
4692 /* Skip past a partially visible first line. */
4694 XSETINT (arg
, XINT (arg
) + 1);
4696 return Fvertical_motion (arg
, window
);
4701 /***********************************************************************
4702 Window Configuration
4703 ***********************************************************************/
4705 struct save_window_data
4707 EMACS_INT size_from_Lisp_Vector_struct
;
4708 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4709 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4710 Lisp_Object frame_tool_bar_lines
;
4711 Lisp_Object selected_frame
;
4712 Lisp_Object current_window
;
4713 Lisp_Object current_buffer
;
4714 Lisp_Object minibuf_scroll_window
;
4715 Lisp_Object root_window
;
4716 Lisp_Object focus_frame
;
4717 /* Record the values of window-min-width and window-min-height
4718 so that window sizes remain consistent with them. */
4719 Lisp_Object min_width
, min_height
;
4720 /* A vector, each of whose elements is a struct saved_window
4722 Lisp_Object saved_windows
;
4725 /* This is saved as a Lisp_Vector */
4728 /* these first two must agree with struct Lisp_Vector in lisp.h */
4729 EMACS_INT size_from_Lisp_Vector_struct
;
4730 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4733 Lisp_Object buffer
, start
, pointm
, mark
;
4734 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4735 Lisp_Object parent
, prev
;
4736 Lisp_Object start_at_line_beg
;
4737 Lisp_Object display_table
;
4738 Lisp_Object orig_top
, orig_height
;
4741 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4743 #define SAVED_WINDOW_N(swv,n) \
4744 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4746 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4747 doc
: /* Return t if OBJECT is a window-configuration object. */)
4751 if (WINDOW_CONFIGURATIONP (object
))
4756 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4757 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
4761 register struct save_window_data
*data
;
4762 struct Lisp_Vector
*saved_windows
;
4764 if (! WINDOW_CONFIGURATIONP (config
))
4765 wrong_type_argument (Qwindow_configuration_p
, config
);
4767 data
= (struct save_window_data
*) XVECTOR (config
);
4768 saved_windows
= XVECTOR (data
->saved_windows
);
4769 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4772 DEFUN ("set-window-configuration", Fset_window_configuration
,
4773 Sset_window_configuration
, 1, 1, 0,
4774 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
4775 CONFIGURATION must be a value previously returned
4776 by `current-window-configuration' (which see).
4777 If CONFIGURATION was made from a frame that is now deleted,
4778 only frame-independent values can be restored. In this case,
4779 the return value is nil. Otherwise the value is t. */)
4781 Lisp_Object configuration
;
4783 register struct save_window_data
*data
;
4784 struct Lisp_Vector
*saved_windows
;
4785 Lisp_Object new_current_buffer
;
4790 while (!WINDOW_CONFIGURATIONP (configuration
))
4791 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4793 data
= (struct save_window_data
*) XVECTOR (configuration
);
4794 saved_windows
= XVECTOR (data
->saved_windows
);
4796 new_current_buffer
= data
->current_buffer
;
4797 if (NILP (XBUFFER (new_current_buffer
)->name
))
4798 new_current_buffer
= Qnil
;
4801 if (XBUFFER (new_current_buffer
) == current_buffer
)
4805 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4808 /* If f is a dead frame, don't bother rebuilding its window tree.
4809 However, there is other stuff we should still try to do below. */
4810 if (FRAME_LIVE_P (f
))
4812 register struct window
*w
;
4813 register struct saved_window
*p
;
4814 struct window
*root_window
;
4815 struct window
**leaf_windows
;
4819 /* If the frame has been resized since this window configuration was
4820 made, we change the frame to the size specified in the
4821 configuration, restore the configuration, and then resize it
4822 back. We keep track of the prevailing height in these variables. */
4823 int previous_frame_height
= FRAME_HEIGHT (f
);
4824 int previous_frame_width
= FRAME_WIDTH (f
);
4825 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4826 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4828 /* The mouse highlighting code could get screwed up
4829 if it runs during this. */
4832 if (XFASTINT (data
->frame_height
) != previous_frame_height
4833 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4834 change_frame_size (f
, XFASTINT (data
->frame_height
),
4835 XFASTINT (data
->frame_width
), 0, 0, 0);
4836 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4837 if (XFASTINT (data
->frame_menu_bar_lines
)
4838 != previous_frame_menu_bar_lines
)
4839 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4840 #ifdef HAVE_WINDOW_SYSTEM
4841 if (XFASTINT (data
->frame_tool_bar_lines
)
4842 != previous_frame_tool_bar_lines
)
4843 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4847 /* "Swap out" point from the selected window
4848 into its buffer. We do this now, before
4849 restoring the window contents, and prevent it from
4850 being done later on when we select a new window. */
4851 if (! NILP (XWINDOW (selected_window
)->buffer
))
4853 w
= XWINDOW (selected_window
);
4854 set_marker_both (w
->pointm
,
4856 BUF_PT (XBUFFER (w
->buffer
)),
4857 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4860 windows_or_buffers_changed
++;
4861 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4863 /* Problem: Freeing all matrices and later allocating them again
4864 is a serious redisplay flickering problem. What we would
4865 really like to do is to free only those matrices not reused
4867 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4869 = (struct window
**) alloca (count_windows (root_window
)
4870 * sizeof (struct window
*));
4871 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4873 /* Temporarily avoid any problems with windows that are smaller
4874 than they are supposed to be. */
4875 window_min_height
= 1;
4876 window_min_width
= 1;
4879 Mark all windows now on frame as "deleted".
4880 Restoring the new configuration "undeletes" any that are in it.
4882 Save their current buffers in their height fields, since we may
4883 need it later, if a buffer saved in the configuration is now
4885 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4887 for (k
= 0; k
< saved_windows
->size
; k
++)
4889 p
= SAVED_WINDOW_N (saved_windows
, k
);
4890 w
= XWINDOW (p
->window
);
4893 if (!NILP (p
->parent
))
4894 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4895 XFASTINT (p
->parent
))->window
;
4899 if (!NILP (p
->prev
))
4901 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4902 XFASTINT (p
->prev
))->window
;
4903 XWINDOW (w
->prev
)->next
= p
->window
;
4908 if (!NILP (w
->parent
))
4910 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4912 XWINDOW (w
->parent
)->vchild
= p
->window
;
4913 XWINDOW (w
->parent
)->hchild
= Qnil
;
4917 XWINDOW (w
->parent
)->hchild
= p
->window
;
4918 XWINDOW (w
->parent
)->vchild
= Qnil
;
4923 /* If we squirreled away the buffer in the window's height,
4925 if (BUFFERP (w
->height
))
4926 w
->buffer
= w
->height
;
4929 w
->width
= p
->width
;
4930 w
->height
= p
->height
;
4931 w
->hscroll
= p
->hscroll
;
4932 w
->min_hscroll
= p
->min_hscroll
;
4933 w
->display_table
= p
->display_table
;
4934 w
->orig_top
= p
->orig_top
;
4935 w
->orig_height
= p
->orig_height
;
4936 XSETFASTINT (w
->last_modified
, 0);
4937 XSETFASTINT (w
->last_overlay_modified
, 0);
4939 /* Reinstall the saved buffer and pointers into it. */
4940 if (NILP (p
->buffer
))
4941 w
->buffer
= p
->buffer
;
4944 if (!NILP (XBUFFER (p
->buffer
)->name
))
4945 /* If saved buffer is alive, install it. */
4947 w
->buffer
= p
->buffer
;
4948 w
->start_at_line_beg
= p
->start_at_line_beg
;
4949 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4950 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4951 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4952 p
->mark
, w
->buffer
);
4954 /* As documented in Fcurrent_window_configuration, don't
4955 save the location of point in the buffer which was current
4956 when the window configuration was recorded. */
4957 if (!EQ (p
->buffer
, new_current_buffer
)
4958 && XBUFFER (p
->buffer
) == current_buffer
)
4959 Fgoto_char (w
->pointm
);
4961 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4962 /* Else unless window has a live buffer, get one. */
4964 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4965 /* This will set the markers to beginning of visible
4967 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4968 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4969 w
->start_at_line_beg
= Qt
;
4972 /* Keeping window's old buffer; make sure the markers
4975 /* Set window markers at start of visible range. */
4976 if (XMARKER (w
->start
)->buffer
== 0)
4977 set_marker_restricted (w
->start
, make_number (0),
4979 if (XMARKER (w
->pointm
)->buffer
== 0)
4980 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4981 BUF_PT (XBUFFER (w
->buffer
)),
4982 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4983 w
->start_at_line_beg
= Qt
;
4988 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4989 /* Prevent "swapping out point" in the old selected window
4990 using the buffer that has been restored into it.
4991 That swapping out has already been done,
4992 near the beginning of this function. */
4993 selected_window
= Qnil
;
4994 Fselect_window (data
->current_window
);
4995 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4998 if (NILP (data
->focus_frame
)
4999 || (FRAMEP (data
->focus_frame
)
5000 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5001 Fredirect_frame_focus (frame
, data
->focus_frame
);
5003 #if 0 /* I don't understand why this is needed, and it causes problems
5004 when the frame's old selected window has been deleted. */
5005 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5006 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5010 /* Set the screen height to the value it had before this function. */
5011 if (previous_frame_height
!= FRAME_HEIGHT (f
)
5012 || previous_frame_width
!= FRAME_WIDTH (f
))
5013 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
5015 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5016 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5017 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5019 #ifdef HAVE_WINDOW_SYSTEM
5020 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5021 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5026 /* Now, free glyph matrices in windows that were not reused. */
5027 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5029 if (NILP (leaf_windows
[i
]->buffer
))
5031 /* Assert it's not reused as a combination. */
5032 xassert (NILP (leaf_windows
[i
]->hchild
)
5033 && NILP (leaf_windows
[i
]->vchild
));
5034 free_window_matrices (leaf_windows
[i
]);
5036 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5040 /* If more than one window shows the new and old current buffer,
5041 don't try to preserve point in that buffer. */
5042 if (old_point
> 0 && n
> 1)
5049 /* Fselect_window will have made f the selected frame, so we
5050 reselect the proper frame here. Fhandle_switch_frame will change the
5051 selected window too, but that doesn't make the call to
5052 Fselect_window above totally superfluous; it still sets f's
5054 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5055 do_switch_frame (data
->selected_frame
, 0, 0);
5057 if (! NILP (Vwindow_configuration_change_hook
)
5058 && ! NILP (Vrun_hooks
))
5059 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5062 if (!NILP (new_current_buffer
))
5064 Fset_buffer (new_current_buffer
);
5066 /* If the buffer that is current now is the same
5067 that was current before setting the window configuration,
5068 don't alter its PT. */
5073 /* Restore the minimum heights recorded in the configuration. */
5074 window_min_height
= XINT (data
->min_height
);
5075 window_min_width
= XINT (data
->min_width
);
5077 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5079 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5082 /* Mark all windows now on frame as deleted
5083 by setting their buffers to nil. */
5086 delete_all_subwindows (w
)
5087 register struct window
*w
;
5089 if (!NILP (w
->next
))
5090 delete_all_subwindows (XWINDOW (w
->next
));
5091 if (!NILP (w
->vchild
))
5092 delete_all_subwindows (XWINDOW (w
->vchild
));
5093 if (!NILP (w
->hchild
))
5094 delete_all_subwindows (XWINDOW (w
->hchild
));
5096 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5098 if (!NILP (w
->buffer
))
5101 /* We set all three of these fields to nil, to make sure that we can
5102 distinguish this dead window from any live window. Live leaf
5103 windows will have buffer set, and combination windows will have
5104 vchild or hchild set. */
5109 Vwindow_list
= Qnil
;
5113 count_windows (window
)
5114 register struct window
*window
;
5116 register int count
= 1;
5117 if (!NILP (window
->next
))
5118 count
+= count_windows (XWINDOW (window
->next
));
5119 if (!NILP (window
->vchild
))
5120 count
+= count_windows (XWINDOW (window
->vchild
));
5121 if (!NILP (window
->hchild
))
5122 count
+= count_windows (XWINDOW (window
->hchild
));
5127 /* Fill vector FLAT with leaf windows under W, starting at index I.
5128 Value is last index + 1. */
5131 get_leaf_windows (w
, flat
, i
)
5133 struct window
**flat
;
5138 if (!NILP (w
->hchild
))
5139 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5140 else if (!NILP (w
->vchild
))
5141 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5145 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5152 /* Return a pointer to the glyph W's physical cursor is on. Value is
5153 null if W's current matrix is invalid, so that no meaningfull glyph
5157 get_phys_cursor_glyph (w
)
5160 struct glyph_row
*row
;
5161 struct glyph
*glyph
;
5163 if (w
->phys_cursor
.vpos
>= 0
5164 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5165 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5167 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5168 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5177 save_window_save (window
, vector
, i
)
5179 struct Lisp_Vector
*vector
;
5182 register struct saved_window
*p
;
5183 register struct window
*w
;
5184 register Lisp_Object tem
;
5186 for (;!NILP (window
); window
= w
->next
)
5188 p
= SAVED_WINDOW_N (vector
, i
);
5189 w
= XWINDOW (window
);
5191 XSETFASTINT (w
->temslot
, i
++);
5193 p
->buffer
= w
->buffer
;
5196 p
->width
= w
->width
;
5197 p
->height
= w
->height
;
5198 p
->hscroll
= w
->hscroll
;
5199 p
->min_hscroll
= w
->min_hscroll
;
5200 p
->display_table
= w
->display_table
;
5201 p
->orig_top
= w
->orig_top
;
5202 p
->orig_height
= w
->orig_height
;
5203 if (!NILP (w
->buffer
))
5205 /* Save w's value of point in the window configuration.
5206 If w is the selected window, then get the value of point
5207 from the buffer; pointm is garbage in the selected window. */
5208 if (EQ (window
, selected_window
))
5210 p
->pointm
= Fmake_marker ();
5211 set_marker_both (p
->pointm
, w
->buffer
,
5212 BUF_PT (XBUFFER (w
->buffer
)),
5213 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5216 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5218 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5219 p
->start_at_line_beg
= w
->start_at_line_beg
;
5221 tem
= XBUFFER (w
->buffer
)->mark
;
5222 p
->mark
= Fcopy_marker (tem
, Qnil
);
5229 p
->start_at_line_beg
= Qnil
;
5232 if (NILP (w
->parent
))
5235 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5240 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5242 if (!NILP (w
->vchild
))
5243 i
= save_window_save (w
->vchild
, vector
, i
);
5244 if (!NILP (w
->hchild
))
5245 i
= save_window_save (w
->hchild
, vector
, i
);
5251 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5252 Scurrent_window_configuration
, 0, 1, 0,
5253 doc
: /* Return an object representing the current window configuration of FRAME.
5254 If FRAME is nil or omitted, use the selected frame.
5255 This describes the number of windows, their sizes and current buffers,
5256 and for each displayed buffer, where display starts, and the positions of
5257 point and mark. An exception is made for point in the current buffer:
5258 its value is -not- saved.
5259 This also records the currently selected frame, and FRAME's focus
5260 redirection (see `redirect-frame-focus'). */)
5264 register Lisp_Object tem
;
5265 register int n_windows
;
5266 register struct save_window_data
*data
;
5267 register struct Lisp_Vector
*vec
;
5272 frame
= selected_frame
;
5273 CHECK_LIVE_FRAME (frame
);
5276 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5277 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
5278 data
= (struct save_window_data
*)vec
;
5280 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5281 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5282 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5283 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5284 data
->selected_frame
= selected_frame
;
5285 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5286 XSETBUFFER (data
->current_buffer
, current_buffer
);
5287 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5288 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5289 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5290 XSETINT (data
->min_height
, window_min_height
);
5291 XSETINT (data
->min_width
, window_min_width
);
5292 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5293 data
->saved_windows
= tem
;
5294 for (i
= 0; i
< n_windows
; i
++)
5295 XVECTOR (tem
)->contents
[i
]
5296 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5297 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5298 XSETWINDOW_CONFIGURATION (tem
, data
);
5302 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5304 doc
: /* Execute body, preserving window sizes and contents.
5305 Restore which buffer appears in which window, where display starts,
5306 and the value of point and mark for each window.
5307 Also restore the choice of selected window.
5308 Also restore which buffer is current.
5309 Does not restore the value of point in current buffer.
5310 usage: (save-window-excursion BODY ...) */)
5314 register Lisp_Object val
;
5315 register int count
= specpdl_ptr
- specpdl
;
5317 record_unwind_protect (Fset_window_configuration
,
5318 Fcurrent_window_configuration (Qnil
));
5319 val
= Fprogn (args
);
5320 return unbind_to (count
, val
);
5324 /***********************************************************************
5326 ***********************************************************************/
5328 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5330 doc
: /* Set width of marginal areas of window WINDOW.
5331 If window is nil, set margins of the currently selected window.
5332 First parameter LEFT-WIDTH specifies the number of character
5333 cells to reserve for the left marginal area. Second parameter
5334 RIGHT-WIDTH does the same for the right marginal area.
5335 A nil width parameter means no margin. */)
5336 (window
, left
, right
)
5337 Lisp_Object window
, left
, right
;
5339 struct window
*w
= decode_window (window
);
5342 CHECK_NUMBER_OR_FLOAT (left
);
5344 CHECK_NUMBER_OR_FLOAT (right
);
5346 /* Check widths < 0 and translate a zero width to nil.
5347 Margins that are too wide have to be checked elsewhere. */
5348 if ((INTEGERP (left
) && XINT (left
) < 0)
5349 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5350 XSETFASTINT (left
, 0);
5351 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5354 if ((INTEGERP (right
) && XINT (right
) < 0)
5355 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5356 XSETFASTINT (right
, 0);
5357 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5360 w
->left_margin_width
= left
;
5361 w
->right_margin_width
= right
;
5363 ++windows_or_buffers_changed
;
5364 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5369 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5371 doc
: /* Get width of marginal areas of window WINDOW.
5372 If WINDOW is omitted or nil, use the currently selected window.
5373 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
5374 If a marginal area does not exist, its width will be returned
5379 struct window
*w
= decode_window (window
);
5380 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5385 /***********************************************************************
5387 ***********************************************************************/
5389 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5390 doc
: /* Return the amount by which WINDOW is scrolled vertically.
5391 Use the selected window if WINDOW is nil or omitted.
5392 Value is a multiple of the canonical character height of WINDOW. */)
5401 window
= selected_window
;
5403 CHECK_WINDOW (window
);
5404 w
= XWINDOW (window
);
5405 f
= XFRAME (w
->frame
);
5407 if (FRAME_WINDOW_P (f
))
5408 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5410 result
= make_number (0);
5415 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5417 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
5418 WINDOW nil or omitted means use the selected window. VSCROLL is a
5419 non-negative multiple of the canonical character height of WINDOW. */)
5421 Lisp_Object window
, vscroll
;
5427 window
= selected_window
;
5429 CHECK_WINDOW (window
);
5430 CHECK_NUMBER_OR_FLOAT (vscroll
);
5432 w
= XWINDOW (window
);
5433 f
= XFRAME (w
->frame
);
5435 if (FRAME_WINDOW_P (f
))
5437 int old_dy
= w
->vscroll
;
5439 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5440 w
->vscroll
= min (w
->vscroll
, 0);
5442 /* Adjust glyph matrix of the frame if the virtual display
5443 area becomes larger than before. */
5444 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5447 /* Prevent redisplay shortcuts. */
5448 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5451 return Fwindow_vscroll (window
);
5455 /* Call FN for all leaf windows on frame F. FN is called with the
5456 first argument being a pointer to the leaf window, and with
5457 additional argument USER_DATA. Stops when FN returns 0. */
5460 foreach_window (f
, fn
, user_data
)
5462 int (* fn
) P_ ((struct window
*, void *));
5465 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5469 /* Helper function for foreach_window. Call FN for all leaf windows
5470 reachable from W. FN is called with the first argument being a
5471 pointer to the leaf window, and with additional argument USER_DATA.
5472 Stop when FN returns 0. Value is 0 if stopped by FN. */
5475 foreach_window_1 (w
, fn
, user_data
)
5477 int (* fn
) P_ ((struct window
*, void *));
5482 for (cont
= 1; w
&& cont
;)
5484 if (!NILP (w
->hchild
))
5485 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5486 else if (!NILP (w
->vchild
))
5487 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5489 cont
= fn (w
, user_data
);
5491 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5498 /* Freeze or unfreeze the window start of W unless it is a
5499 mini-window or the selected window. FREEZE_P non-null means freeze
5500 the window start. */
5503 freeze_window_start (w
, freeze_p
)
5507 if (w
== XWINDOW (selected_window
)
5508 || MINI_WINDOW_P (w
)
5509 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5510 && ! NILP (Vminibuf_scroll_window
)
5511 && w
== XWINDOW (Vminibuf_scroll_window
)))
5514 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5519 /* Freeze or unfreeze the window starts of all leaf windows on frame
5520 F, except the selected window and a mini-window. FREEZE_P non-zero
5521 means freeze the window start. */
5524 freeze_window_starts (f
, freeze_p
)
5528 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5532 /***********************************************************************
5534 ***********************************************************************/
5536 /* Return 1 if window configurations C1 and C2
5537 describe the same state of affairs. This is used by Fequal. */
5540 compare_window_configurations (c1
, c2
, ignore_positions
)
5542 int ignore_positions
;
5544 register struct save_window_data
*d1
, *d2
;
5545 struct Lisp_Vector
*sw1
, *sw2
;
5548 if (!WINDOW_CONFIGURATIONP (c1
))
5549 wrong_type_argument (Qwindow_configuration_p
, c1
);
5550 if (!WINDOW_CONFIGURATIONP (c2
))
5551 wrong_type_argument (Qwindow_configuration_p
, c2
);
5553 d1
= (struct save_window_data
*) XVECTOR (c1
);
5554 d2
= (struct save_window_data
*) XVECTOR (c2
);
5555 sw1
= XVECTOR (d1
->saved_windows
);
5556 sw2
= XVECTOR (d2
->saved_windows
);
5558 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5560 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5562 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5564 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5566 /* Don't compare the current_window field directly.
5567 Instead see w1_is_current and w2_is_current, below. */
5568 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5570 if (! ignore_positions
)
5571 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5573 /* Don't compare the root_window field.
5574 We don't require the two configurations
5575 to use the same window object,
5576 and the two root windows must be equivalent
5577 if everything else compares equal. */
5578 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5580 if (! EQ (d1
->min_width
, d2
->min_width
))
5582 if (! EQ (d1
->min_height
, d2
->min_height
))
5585 /* Verify that the two confis have the same number of windows. */
5586 if (sw1
->size
!= sw2
->size
)
5589 for (i
= 0; i
< sw1
->size
; i
++)
5591 struct saved_window
*p1
, *p2
;
5592 int w1_is_current
, w2_is_current
;
5594 p1
= SAVED_WINDOW_N (sw1
, i
);
5595 p2
= SAVED_WINDOW_N (sw2
, i
);
5597 /* Verify that the current windows in the two
5598 configurations correspond to each other. */
5599 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5600 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5602 if (w1_is_current
!= w2_is_current
)
5605 /* Verify that the corresponding windows do match. */
5606 if (! EQ (p1
->buffer
, p2
->buffer
))
5608 if (! EQ (p1
->left
, p2
->left
))
5610 if (! EQ (p1
->top
, p2
->top
))
5612 if (! EQ (p1
->width
, p2
->width
))
5614 if (! EQ (p1
->height
, p2
->height
))
5616 if (! EQ (p1
->display_table
, p2
->display_table
))
5618 if (! EQ (p1
->parent
, p2
->parent
))
5620 if (! EQ (p1
->prev
, p2
->prev
))
5622 if (! ignore_positions
)
5624 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5626 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5628 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5630 if (NILP (Fequal (p1
->start
, p2
->start
)))
5632 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5634 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5642 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5643 Scompare_window_configurations
, 2, 2, 0,
5644 doc
: /* Compare two window configurations as regards the structure of windows.
5645 This function ignores details such as the values of point and mark
5646 and scrolling positions. */)
5650 if (compare_window_configurations (x
, y
, 1))
5658 struct frame
*f
= make_terminal_frame ();
5659 XSETFRAME (selected_frame
, f
);
5660 Vterminal_frame
= selected_frame
;
5661 minibuf_window
= f
->minibuffer_window
;
5662 selected_window
= f
->selected_window
;
5663 last_nonminibuf_frame
= f
;
5665 window_initialized
= 1;
5671 Vwindow_list
= Qnil
;
5677 Qleft_fringe
= intern ("left-fringe");
5678 staticpro (&Qleft_fringe
);
5679 Qright_fringe
= intern ("right-fringe");
5680 staticpro (&Qright_fringe
);
5682 Qwindow_size_fixed
= intern ("window-size-fixed");
5683 staticpro (&Qwindow_size_fixed
);
5685 staticpro (&Qwindow_configuration_change_hook
);
5686 Qwindow_configuration_change_hook
5687 = intern ("window-configuration-change-hook");
5689 Qwindowp
= intern ("windowp");
5690 staticpro (&Qwindowp
);
5692 Qwindow_configuration_p
= intern ("window-configuration-p");
5693 staticpro (&Qwindow_configuration_p
);
5695 Qwindow_live_p
= intern ("window-live-p");
5696 staticpro (&Qwindow_live_p
);
5698 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5699 staticpro (&Qtemp_buffer_show_hook
);
5701 staticpro (&Vwindow_list
);
5703 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5704 doc
: /* Non-nil means call as function to display a help buffer.
5705 The function is called with one argument, the buffer to be displayed.
5706 Used by `with-output-to-temp-buffer'.
5707 If this function is used, then it must do the entire job of showing
5708 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
5709 Vtemp_buffer_show_function
= Qnil
;
5711 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5712 doc
: /* If non-nil, function to call to handle `display-buffer'.
5713 It will receive two args, the buffer and a flag which if non-nil means
5714 that the currently selected window is not acceptable.
5715 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
5716 work using this function. */);
5717 Vdisplay_buffer_function
= Qnil
;
5719 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5720 doc
: /* *If non-nil, `display-buffer' should even the window heights.
5721 If nil, `display-buffer' will leave the window configuration alone. */);
5722 Veven_window_heights
= Qt
;
5724 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5725 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
5726 Vminibuf_scroll_window
= Qnil
;
5728 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5729 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
5730 Vother_window_scroll_buffer
= Qnil
;
5732 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5733 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
5736 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5737 doc
: /* *Non-nil means `display-buffer' should reuse frames.
5738 If the buffer in question is already displayed in a frame, raise that frame. */);
5739 display_buffer_reuse_frames
= 0;
5741 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5742 doc
: /* Function to call to handle automatic new frame creation.
5743 It is called with no arguments and should return a newly created frame.
5745 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
5746 where `pop-up-frame-alist' would hold the default frame parameters. */);
5747 Vpop_up_frame_function
= Qnil
;
5749 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5750 doc
: /* *List of buffer names that should have their own special frames.
5751 Displaying a buffer whose name is in this list makes a special frame for it
5752 using `special-display-function'. See also `special-display-regexps'.
5754 An element of the list can be a list instead of just a string.
5755 There are two ways to use a list as an element:
5756 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
5757 In the first case, FRAME-PARAMETERS are used to create the frame.
5758 In the latter case, FUNCTION is called with BUFFER as the first argument,
5759 followed by OTHER-ARGS--it can display BUFFER in any way it likes.
5760 All this is done by the function found in `special-display-function'.
5762 If this variable appears \"not to work\", because you add a name to it
5763 but that buffer still appears in the selected window, look at the
5764 values of `same-window-buffer-names' and `same-window-regexps'.
5765 Those variables take precedence over this one. */);
5766 Vspecial_display_buffer_names
= Qnil
;
5768 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5769 doc
: /* *List of regexps saying which buffers should have their own special frames.
5770 If a buffer name matches one of these regexps, it gets its own frame.
5771 Displaying a buffer whose name is in this list makes a special frame for it
5772 using `special-display-function'.
5774 An element of the list can be a list instead of just a string.
5775 There are two ways to use a list as an element:
5776 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
5777 In the first case, FRAME-PARAMETERS are used to create the frame.
5778 In the latter case, FUNCTION is called with the buffer as first argument,
5779 followed by OTHER-ARGS--it can display the buffer in any way it likes.
5780 All this is done by the function found in `special-display-function'.
5782 If this variable appears \"not to work\", because you add a regexp to it
5783 but the matching buffers still appear in the selected window, look at the
5784 values of `same-window-buffer-names' and `same-window-regexps'.
5785 Those variables take precedence over this one. */);
5786 Vspecial_display_regexps
= Qnil
;
5788 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5789 doc
: /* Function to call to make a new frame for a special buffer.
5790 It is called with two arguments, the buffer and optional buffer specific
5791 data, and should return a window displaying that buffer.
5792 The default value makes a separate frame for the buffer,
5793 using `special-display-frame-alist' to specify the frame parameters.
5795 A buffer is special if its is listed in `special-display-buffer-names'
5796 or matches a regexp in `special-display-regexps'. */);
5797 Vspecial_display_function
= Qnil
;
5799 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5800 doc
: /* *List of buffer names that should appear in the selected window.
5801 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
5802 switches to it in the selected window, rather than making it appear
5803 in some other window.
5805 An element of the list can be a cons cell instead of just a string.
5806 Then the car must be a string, which specifies the buffer name.
5807 This is for compatibility with `special-display-buffer-names';
5808 the cdr of the cons cell is ignored.
5810 See also `same-window-regexps'. */);
5811 Vsame_window_buffer_names
= Qnil
;
5813 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5814 doc
: /* *List of regexps saying which buffers should appear in the selected window.
5815 If a buffer name matches one of these regexps, then displaying it
5816 using `display-buffer' or `pop-to-buffer' switches to it
5817 in the selected window, rather than making it appear in some other window.
5819 An element of the list can be a cons cell instead of just a string.
5820 Then the car must be a string, which specifies the buffer name.
5821 This is for compatibility with `special-display-buffer-names';
5822 the cdr of the cons cell is ignored.
5824 See also `same-window-buffer-names'. */);
5825 Vsame_window_regexps
= Qnil
;
5827 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5828 doc
: /* *Non-nil means display-buffer should make new windows. */);
5831 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5832 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
5833 next_screen_context_lines
= 2;
5835 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5836 doc
: /* *display-buffer would prefer to split the largest window if this large.
5837 If there is only one window, it is split regardless of this value. */);
5838 split_height_threshold
= 500;
5840 DEFVAR_INT ("window-min-height", &window_min_height
,
5841 doc
: /* *Delete any window less than this tall (including its mode line). */);
5842 window_min_height
= 4;
5844 DEFVAR_INT ("window-min-width", &window_min_width
,
5845 doc
: /* *Delete any window less than this wide. */);
5846 window_min_width
= 10;
5848 DEFVAR_LISP ("scroll-preserve-screen-position",
5849 &Vscroll_preserve_screen_position
,
5850 doc
: /* *Non-nil means scroll commands move point to keep its screen line unchanged. */);
5851 Vscroll_preserve_screen_position
= Qnil
;
5853 DEFVAR_LISP ("window-configuration-change-hook",
5854 &Vwindow_configuration_change_hook
,
5855 doc
: /* Functions to call when window configuration changes.
5856 The selected frame is the one whose configuration has changed. */);
5857 Vwindow_configuration_change_hook
= Qnil
;
5859 DEFVAR_BOOL ("window-size-fixed", &window_size_fixed
,
5860 doc
: /* Non-nil in a buffer means windows displaying the buffer are fixed-size.
5861 Emacs won't change the size of any window displaying that buffer,
5862 unless you explicitly change the size, or Emacs has no other choice.
5863 This variable automatically becomes buffer-local when set. */);
5864 Fmake_variable_buffer_local (Qwindow_size_fixed
);
5865 window_size_fixed
= 0;
5867 defsubr (&Sselected_window
);
5868 defsubr (&Sminibuffer_window
);
5869 defsubr (&Swindow_minibuffer_p
);
5870 defsubr (&Swindowp
);
5871 defsubr (&Swindow_live_p
);
5872 defsubr (&Spos_visible_in_window_p
);
5873 defsubr (&Swindow_buffer
);
5874 defsubr (&Swindow_height
);
5875 defsubr (&Swindow_width
);
5876 defsubr (&Swindow_hscroll
);
5877 defsubr (&Sset_window_hscroll
);
5878 defsubr (&Swindow_redisplay_end_trigger
);
5879 defsubr (&Sset_window_redisplay_end_trigger
);
5880 defsubr (&Swindow_edges
);
5881 defsubr (&Scoordinates_in_window_p
);
5882 defsubr (&Swindow_at
);
5883 defsubr (&Swindow_point
);
5884 defsubr (&Swindow_start
);
5885 defsubr (&Swindow_end
);
5886 defsubr (&Sset_window_point
);
5887 defsubr (&Sset_window_start
);
5888 defsubr (&Swindow_dedicated_p
);
5889 defsubr (&Sset_window_dedicated_p
);
5890 defsubr (&Swindow_display_table
);
5891 defsubr (&Sset_window_display_table
);
5892 defsubr (&Snext_window
);
5893 defsubr (&Sprevious_window
);
5894 defsubr (&Sother_window
);
5895 defsubr (&Sget_lru_window
);
5896 defsubr (&Sget_largest_window
);
5897 defsubr (&Sget_buffer_window
);
5898 defsubr (&Sdelete_other_windows
);
5899 defsubr (&Sdelete_windows_on
);
5900 defsubr (&Sreplace_buffer_in_windows
);
5901 defsubr (&Sdelete_window
);
5902 defsubr (&Sset_window_buffer
);
5903 defsubr (&Sselect_window
);
5904 defsubr (&Sspecial_display_p
);
5905 defsubr (&Ssame_window_p
);
5906 defsubr (&Sdisplay_buffer
);
5907 defsubr (&Ssplit_window
);
5908 defsubr (&Senlarge_window
);
5909 defsubr (&Sshrink_window
);
5910 defsubr (&Sscroll_up
);
5911 defsubr (&Sscroll_down
);
5912 defsubr (&Sscroll_left
);
5913 defsubr (&Sscroll_right
);
5914 defsubr (&Sother_window_for_scrolling
);
5915 defsubr (&Sscroll_other_window
);
5916 defsubr (&Srecenter
);
5917 defsubr (&Swindow_text_height
);
5918 defsubr (&Smove_to_window_line
);
5919 defsubr (&Swindow_configuration_p
);
5920 defsubr (&Swindow_configuration_frame
);
5921 defsubr (&Sset_window_configuration
);
5922 defsubr (&Scurrent_window_configuration
);
5923 defsubr (&Ssave_window_excursion
);
5924 defsubr (&Sset_window_margins
);
5925 defsubr (&Swindow_margins
);
5926 defsubr (&Swindow_vscroll
);
5927 defsubr (&Sset_window_vscroll
);
5928 defsubr (&Scompare_window_configurations
);
5929 defsubr (&Swindow_list
);
5935 initial_define_key (control_x_map
, '1', "delete-other-windows");
5936 initial_define_key (control_x_map
, '2', "split-window");
5937 initial_define_key (control_x_map
, '0', "delete-window");
5938 initial_define_key (control_x_map
, 'o', "other-window");
5939 initial_define_key (control_x_map
, '^', "enlarge-window");
5940 initial_define_key (control_x_map
, '<', "scroll-left");
5941 initial_define_key (control_x_map
, '>', "scroll-right");
5943 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5944 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5945 initial_define_key (meta_map
, 'v', "scroll-down");
5947 initial_define_key (global_map
, Ctl('L'), "recenter");
5948 initial_define_key (meta_map
, 'r', "move-to-window-line");