1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
4 2001, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
36 #include "dispextern.h"
37 #include "blockinput.h"
38 #include "intervals.h"
42 #endif /* HAVE_X_WINDOWS */
54 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
55 Lisp_Object Qwindow_size_fixed
;
56 extern Lisp_Object Qleft_margin
, Qright_margin
;
58 static int displayed_window_lines
P_ ((struct window
*));
59 static struct window
*decode_window
P_ ((Lisp_Object
));
60 static int count_windows
P_ ((struct window
*));
61 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
62 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
63 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
64 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
65 static int window_min_size_1
P_ ((struct window
*, int));
66 static int window_min_size
P_ ((struct window
*, int, int, int *));
67 static void size_window
P_ ((Lisp_Object
, int, int, int));
68 static int freeze_window_start
P_ ((struct window
*, void *));
69 static int window_fixed_size_p
P_ ((struct window
*, int, int));
70 static void enlarge_window
P_ ((Lisp_Object
, int, int, int));
71 static Lisp_Object window_list
P_ ((void));
72 static int add_window_to_list
P_ ((struct window
*, void *));
73 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
75 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
77 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
79 static int foreach_window_1
P_ ((struct window
*,
80 int (* fn
) (struct window
*, void *),
82 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
84 /* This is the window in which the terminal's cursor should
85 be left when nothing is being done with it. This must
86 always be a leaf window, and its buffer is selected by
87 the top level editing loop at the end of each command.
89 This value is always the same as
90 FRAME_SELECTED_WINDOW (selected_frame). */
92 Lisp_Object selected_window
;
94 /* A list of all windows for use by next_window and Fwindow_list.
95 Functions creating or deleting windows should invalidate this cache
96 by setting it to nil. */
98 Lisp_Object Vwindow_list
;
100 /* The mini-buffer window of the selected frame.
101 Note that you cannot test for mini-bufferness of an arbitrary window
102 by comparing against this; but you can test for mini-bufferness of
103 the selected window. */
105 Lisp_Object minibuf_window
;
107 /* Non-nil means it is the window whose mode line should be
108 shown as the selected window when the minibuffer is selected. */
110 Lisp_Object minibuf_selected_window
;
112 /* Non-nil means it is the window for C-M-v to scroll
113 when the mini-buffer is selected. */
115 Lisp_Object Vminibuf_scroll_window
;
117 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
119 Lisp_Object Vother_window_scroll_buffer
;
121 /* Non-nil means it's function to call to display temp buffers. */
123 Lisp_Object Vtemp_buffer_show_function
;
125 /* Non-zero means line and page scrolling on tall lines (with images)
126 does partial scrolling by modifying window-vscroll. */
128 int auto_window_vscroll_p
;
130 /* Non-zero means to use mode-line-inactive face in all windows but the
131 selected-window and the minibuffer-scroll-window when the
132 minibuffer is active. */
133 int mode_line_in_non_selected_windows
;
135 /* If a window gets smaller than either of these, it is removed. */
137 EMACS_INT window_min_height
;
138 EMACS_INT window_min_width
;
140 /* Nonzero implies Fdisplay_buffer should create windows. */
144 /* Nonzero implies make new frames for Fdisplay_buffer. */
148 /* Nonzero means reuse existing frames for displaying buffers. */
150 int display_buffer_reuse_frames
;
152 /* Non-nil means use this function instead of default */
154 Lisp_Object Vpop_up_frame_function
;
156 /* Function to call to handle Fdisplay_buffer. */
158 Lisp_Object Vdisplay_buffer_function
;
160 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
162 Lisp_Object Veven_window_heights
;
164 /* List of buffer *names* for buffers that should have their own frames. */
166 Lisp_Object Vspecial_display_buffer_names
;
168 /* List of regexps for buffer names that should have their own frames. */
170 Lisp_Object Vspecial_display_regexps
;
172 /* Function to pop up a special frame. */
174 Lisp_Object Vspecial_display_function
;
176 /* List of buffer *names* for buffers to appear in selected window. */
178 Lisp_Object Vsame_window_buffer_names
;
180 /* List of regexps for buffer names to appear in selected window. */
182 Lisp_Object Vsame_window_regexps
;
184 /* Hook run at end of temp_output_buffer_show. */
186 Lisp_Object Qtemp_buffer_show_hook
;
188 /* Fdisplay_buffer always splits the largest window
189 if that window is more than this high. */
191 EMACS_INT split_height_threshold
;
193 /* Number of lines of continuity in scrolling by screenfuls. */
195 EMACS_INT next_screen_context_lines
;
197 /* Incremented for each window created. */
199 static int sequence_number
;
201 /* Nonzero after init_window_once has finished. */
203 static int window_initialized
;
205 /* Hook to run when window config changes. */
207 Lisp_Object Qwindow_configuration_change_hook
;
208 Lisp_Object Vwindow_configuration_change_hook
;
210 /* Non-nil means scroll commands try to put point
211 at the same screen height as previously. */
213 Lisp_Object Vscroll_preserve_screen_position
;
215 #if 0 /* This isn't used anywhere. */
216 /* Nonzero means we can split a frame even if it is "unsplittable". */
217 static int inhibit_frame_unsplittable
;
220 extern EMACS_INT scroll_margin
;
222 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
224 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
225 doc
: /* Returns t if OBJECT is a window. */)
229 return WINDOWP (object
) ? Qt
: Qnil
;
232 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
233 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
237 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
244 register struct window
*p
;
246 p
= allocate_window ();
248 XSETFASTINT (p
->sequence_number
, sequence_number
);
249 XSETFASTINT (p
->left_col
, 0);
250 XSETFASTINT (p
->top_line
, 0);
251 XSETFASTINT (p
->total_lines
, 0);
252 XSETFASTINT (p
->total_cols
, 0);
253 XSETFASTINT (p
->hscroll
, 0);
254 XSETFASTINT (p
->min_hscroll
, 0);
255 p
->orig_top_line
= p
->orig_total_lines
= 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
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
268 p
->phys_cursor_type
= -1;
269 p
->phys_cursor_width
= -1;
270 p
->must_be_updated_p
= 0;
271 XSETFASTINT (p
->window_end_vpos
, 0);
272 XSETFASTINT (p
->window_end_pos
, 0);
273 p
->window_end_valid
= Qnil
;
276 XSETFASTINT (p
->last_point
, 0);
277 p
->frozen_window_start_p
= 0;
278 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
279 p
->left_margin_cols
= Qnil
;
280 p
->right_margin_cols
= Qnil
;
281 p
->left_fringe_width
= Qnil
;
282 p
->right_fringe_width
= Qnil
;
283 p
->fringes_outside_margins
= Qnil
;
284 p
->scroll_bar_width
= Qnil
;
285 p
->vertical_scroll_bar_type
= Qt
;
291 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
292 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
295 return selected_window
;
298 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
299 doc
: /* Return the window used now for minibuffers.
300 If the optional argument FRAME is specified, return the minibuffer window
301 used by that frame. */)
306 frame
= selected_frame
;
307 CHECK_LIVE_FRAME (frame
);
308 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
311 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
312 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
313 WINDOW defaults to the selected window. */)
317 struct window
*w
= decode_window (window
);
318 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
322 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
323 Spos_visible_in_window_p
, 0, 3, 0,
324 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
325 Return nil if that position is scrolled vertically out of view.
326 If a character is only partially visible, nil is returned, unless the
327 optional argument PARTIALLY is non-nil.
328 If POS is only out of view because of horizontal scrolling, return non-nil.
329 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
331 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
332 return value is a list (X Y PARTIAL) where X and Y are the pixel coordinates
333 relative to the top left corner of the window. PARTIAL is nil if the character
334 after POS is fully visible; otherwise it is a cons (RTOP . RBOT) where RTOP
335 and RBOT are the number of pixels invisible at the top and bottom of the row. */)
336 (pos
, window
, partially
)
337 Lisp_Object pos
, window
, partially
;
339 register struct window
*w
;
341 register struct buffer
*buf
;
343 Lisp_Object in_window
= Qnil
;
344 int rtop
, rbot
, fully_p
= 1;
347 w
= decode_window (window
);
348 buf
= XBUFFER (w
->buffer
);
349 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
353 CHECK_NUMBER_COERCE_MARKER (pos
);
356 else if (w
== XWINDOW (selected_window
))
359 posint
= XMARKER (w
->pointm
)->charpos
;
361 /* If position is above window start or outside buffer boundaries,
362 or if window start is out of range, position is not visible. */
363 if (posint
>= CHARPOS (top
)
364 && posint
<= BUF_ZV (buf
)
365 && CHARPOS (top
) >= BUF_BEGV (buf
)
366 && CHARPOS (top
) <= BUF_ZV (buf
)
367 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, NILP (partially
))
368 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
371 if (!NILP (in_window
) && !NILP (partially
))
372 in_window
= Fcons (make_number (x
),
373 Fcons (make_number (y
),
374 Fcons ((fully_p
? Qnil
375 : Fcons (make_number (rtop
),
376 make_number (rbot
))),
382 static struct window
*
383 decode_window (window
)
384 register Lisp_Object window
;
387 return XWINDOW (selected_window
);
389 CHECK_LIVE_WINDOW (window
);
390 return XWINDOW (window
);
393 static struct window
*
394 decode_any_window (window
)
395 register Lisp_Object window
;
398 return XWINDOW (selected_window
);
400 CHECK_WINDOW (window
);
401 return XWINDOW (window
);
404 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
405 doc
: /* Return the buffer that WINDOW is displaying.
406 WINDOW defaults to the selected window. */)
410 return decode_window (window
)->buffer
;
413 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
414 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
418 return decode_any_window (window
)->total_lines
;
421 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
422 doc
: /* Return the number of display columns in WINDOW.
423 This is the width that is usable columns available for text in WINDOW.
424 If you want to find out how many columns WINDOW takes up,
425 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
429 return make_number (window_box_text_cols (decode_any_window (window
)));
432 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
433 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
437 return decode_window (window
)->hscroll
;
440 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
441 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
442 Return NCOL. NCOL should be zero or positive.
444 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
445 window so that the location of point becomes invisible. */)
447 Lisp_Object window
, ncol
;
449 struct window
*w
= decode_window (window
);
453 hscroll
= max (0, XINT (ncol
));
455 /* Prevent redisplay shortcuts when changing the hscroll. */
456 if (XINT (w
->hscroll
) != hscroll
)
457 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
459 w
->hscroll
= make_number (hscroll
);
463 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
464 Swindow_redisplay_end_trigger
, 0, 1, 0,
465 doc
: /* Return WINDOW's redisplay end trigger value.
466 See `set-window-redisplay-end-trigger' for more information. */)
470 return decode_window (window
)->redisplay_end_trigger
;
473 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
474 Sset_window_redisplay_end_trigger
, 2, 2, 0,
475 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
476 VALUE should be a buffer position (typically a marker) or nil.
477 If it is a buffer position, then if redisplay in WINDOW reaches a position
478 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
479 with two arguments: WINDOW, and the end trigger value.
480 Afterwards the end-trigger value is reset to nil. */)
482 register Lisp_Object window
, value
;
484 register struct window
*w
;
486 w
= decode_window (window
);
487 w
->redisplay_end_trigger
= value
;
491 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
492 doc
: /* Return a list of the edge coordinates of WINDOW.
493 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
494 RIGHT is one more than the rightmost column occupied by WINDOW,
495 and BOTTOM is one more than the bottommost row occupied by WINDOW.
496 The edges include the space used by the window's scroll bar,
497 display margins, fringes, header line, and mode line, if it has them.
498 To get the edges of the actual text area, use `window-inside-edges'. */)
502 register struct window
*w
= decode_any_window (window
);
504 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
505 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
506 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
507 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
511 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
512 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
513 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
514 RIGHT is one more than the rightmost x position occupied by WINDOW,
515 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
516 The pixel edges include the space used by the window's scroll bar,
517 display margins, fringes, header line, and mode line, if it has them.
518 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
522 register struct window
*w
= decode_any_window (window
);
524 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
525 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
526 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
527 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
531 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
532 doc
: /* Return a list of the edge coordinates of WINDOW.
533 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
534 RIGHT is one more than the rightmost column used by text in WINDOW,
535 and BOTTOM is one more than the bottommost row used by text in WINDOW.
536 The inside edges do not include the space used by the window's scroll bar,
537 display margins, fringes, header line, and/or mode line. */)
541 register struct window
*w
= decode_any_window (window
);
543 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
544 + WINDOW_LEFT_MARGIN_COLS (w
)
545 + WINDOW_LEFT_FRINGE_COLS (w
)),
546 make_number (WINDOW_TOP_EDGE_LINE (w
)
547 + WINDOW_HEADER_LINE_LINES (w
)),
548 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
549 - WINDOW_RIGHT_MARGIN_COLS (w
)
550 - WINDOW_RIGHT_FRINGE_COLS (w
)),
551 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
552 - WINDOW_MODE_LINE_LINES (w
)));
555 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
556 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
557 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
558 RIGHT is one more than the rightmost x position used by text in WINDOW,
559 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
560 The inside edges do not include the space used by the window's scroll bar,
561 display margins, fringes, header line, and/or mode line. */)
565 register struct window
*w
= decode_any_window (window
);
567 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
568 + WINDOW_LEFT_MARGIN_WIDTH (w
)
569 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
570 make_number (WINDOW_TOP_EDGE_Y (w
)
571 + WINDOW_HEADER_LINE_HEIGHT (w
)),
572 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
573 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
574 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
575 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
576 - WINDOW_MODE_LINE_HEIGHT (w
)));
579 /* Test if the character at column *X, row *Y is within window W.
580 If it is not, return ON_NOTHING;
581 if it is in the window's text area,
582 set *x and *y to its location relative to the upper left corner
585 if it is on the window's modeline, return ON_MODE_LINE;
586 if it is on the border between the window and its right sibling,
587 return ON_VERTICAL_BORDER.
588 if it is on a scroll bar,
589 return ON_SCROLL_BAR.
590 if it is on the window's top line, return ON_HEADER_LINE;
591 if it is in left or right fringe of the window,
592 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
593 to window-relative coordinates;
594 if it is in the marginal area to the left/right of the window,
595 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
596 to window-relative coordinates.
598 X and Y are frame relative pixel coordinates. */
600 static enum window_part
601 coordinates_in_window (w
, x
, y
)
602 register struct window
*w
;
605 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
606 int left_x
, right_x
, top_y
, bottom_y
;
607 enum window_part part
;
608 int ux
= FRAME_COLUMN_WIDTH (f
);
609 int x0
= WINDOW_LEFT_EDGE_X (w
);
610 int x1
= WINDOW_RIGHT_EDGE_X (w
);
611 /* The width of the area where the vertical line can be dragged.
612 (Between mode lines for instance. */
613 int grabbable_width
= ux
;
614 int lmargin_width
, rmargin_width
, text_left
, text_right
;
616 /* In what's below, we subtract 1 when computing right_x because we
617 want the rightmost pixel, which is given by left_pixel+width-1. */
618 if (w
->pseudo_window_p
)
621 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
622 top_y
= WINDOW_TOP_EDGE_Y (w
);
623 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
627 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
628 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
629 top_y
= WINDOW_TOP_EDGE_Y (w
);
630 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
633 /* Outside any interesting row? */
634 if (*y
< top_y
|| *y
>= bottom_y
)
637 /* On the mode line or header line? If it's near the start of
638 the mode or header line of window that's has a horizontal
639 sibling, say it's on the vertical line. That's to be able
640 to resize windows horizontally in case we're using toolkit
643 if (WINDOW_WANTS_MODELINE_P (w
)
644 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
648 header_vertical_border_check
:
649 /* We're somewhere on the mode line. We consider the place
650 between mode lines of horizontally adjacent mode lines
651 as the vertical border. If scroll bars on the left,
652 return the right window. */
653 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
654 || WINDOW_RIGHTMOST_P (w
))
656 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
657 return ON_VERTICAL_BORDER
;
661 if (abs (*x
- x1
) < grabbable_width
)
662 return ON_VERTICAL_BORDER
;
665 if (*x
< x0
|| *x
>= x1
)
668 /* Convert X and Y to window relative coordinates.
669 Mode line starts at left edge of window. */
675 if (WINDOW_WANTS_HEADER_LINE_P (w
)
676 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
678 part
= ON_HEADER_LINE
;
679 goto header_vertical_border_check
;
682 if (*x
< x0
|| *x
>= x1
)
685 /* Outside any interesting column? */
686 if (*x
< left_x
|| *x
> right_x
)
689 return ON_SCROLL_BAR
;
692 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
693 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
695 text_left
= window_box_left (w
, TEXT_AREA
);
696 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
698 if (FRAME_WINDOW_P (f
))
700 if (!w
->pseudo_window_p
701 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
702 && !WINDOW_RIGHTMOST_P (w
)
703 && (abs (*x
- right_x
) < grabbable_width
))
704 return ON_VERTICAL_BORDER
;
708 /* Need to say "*x > right_x" rather than >=, since on character
709 terminals, the vertical line's x coordinate is right_x. */
710 if (!w
->pseudo_window_p
711 && !WINDOW_RIGHTMOST_P (w
)
712 && *x
> right_x
- ux
)
714 /* On the border on the right side of the window? Assume that
715 this area begins at RIGHT_X minus a canonical char width. */
716 return ON_VERTICAL_BORDER
;
722 if (lmargin_width
> 0
723 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
724 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
725 : (*x
< left_x
+ lmargin_width
)))
728 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
729 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
731 return ON_LEFT_MARGIN
;
734 /* Convert X and Y to window-relative pixel coordinates. */
737 return ON_LEFT_FRINGE
;
740 if (*x
>= text_right
)
742 if (rmargin_width
> 0
743 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
744 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
745 : (*x
>= right_x
- rmargin_width
)))
747 *x
-= right_x
- rmargin_width
;
748 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
749 *x
+= WINDOW_RIGHT_FRINGE_WIDTH (w
);
751 return ON_RIGHT_MARGIN
;
754 /* Convert X and Y to window-relative pixel coordinates. */
755 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
757 return ON_RIGHT_FRINGE
;
760 /* Everything special ruled out - must be on text area */
767 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
768 Scoordinates_in_window_p
, 2, 2, 0,
769 doc
: /* Return non-nil if COORDINATES are in WINDOW.
770 COORDINATES is a cons of the form (X . Y), X and Y being distances
771 measured in characters from the upper-left corner of the frame.
772 \(0 . 0) denotes the character in the upper left corner of the
774 If COORDINATES are in the text portion of WINDOW,
775 the coordinates relative to the window are returned.
776 If they are in the mode line of WINDOW, `mode-line' is returned.
777 If they are in the top mode line of WINDOW, `header-line' is returned.
778 If they are in the left fringe of WINDOW, `left-fringe' is returned.
779 If they are in the right fringe of WINDOW, `right-fringe' is returned.
780 If they are on the border between WINDOW and its right sibling,
781 `vertical-line' is returned.
782 If they are in the windows's left or right marginal areas, `left-margin'\n\
783 or `right-margin' is returned. */)
784 (coordinates
, window
)
785 register Lisp_Object coordinates
, window
;
792 CHECK_WINDOW (window
);
793 w
= XWINDOW (window
);
794 f
= XFRAME (w
->frame
);
795 CHECK_CONS (coordinates
);
796 lx
= Fcar (coordinates
);
797 ly
= Fcdr (coordinates
);
798 CHECK_NUMBER_OR_FLOAT (lx
);
799 CHECK_NUMBER_OR_FLOAT (ly
);
800 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
801 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
803 switch (coordinates_in_window (w
, &x
, &y
))
809 /* X and Y are now window relative pixel coordinates. Convert
810 them to canonical char units before returning them. */
811 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
812 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
817 case ON_VERTICAL_BORDER
:
818 return Qvertical_line
;
826 case ON_RIGHT_FRINGE
:
827 return Qright_fringe
;
832 case ON_RIGHT_MARGIN
:
833 return Qright_margin
;
836 /* Historically we are supposed to return nil in this case. */
845 /* Callback for foreach_window, used in window_from_coordinates.
846 Check if window W contains coordinates specified by USER_DATA which
847 is actually a pointer to a struct check_window_data CW.
849 Check if window W contains coordinates *CW->x and *CW->y. If it
850 does, return W in *CW->window, as Lisp_Object, and return in
851 *CW->part the part of the window under coordinates *X,*Y. Return
852 zero from this function to stop iterating over windows. */
854 struct check_window_data
858 enum window_part
*part
;
862 check_window_containing (w
, user_data
)
866 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
867 enum window_part found
;
870 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
871 if (found
!= ON_NOTHING
)
874 XSETWINDOW (*cw
->window
, w
);
882 /* Find the window containing frame-relative pixel position X/Y and
883 return it as a Lisp_Object.
885 If X, Y is on one of the window's special `window_part' elements,
886 set *PART to the id of that element, and return X and Y converted
887 to window relative coordinates in WX and WY.
889 If there is no window under X, Y return nil and leave *PART
890 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
892 This function was previously implemented with a loop cycling over
893 windows with Fnext_window, and starting with the frame's selected
894 window. It turned out that this doesn't work with an
895 implementation of next_window using Vwindow_list, because
896 FRAME_SELECTED_WINDOW (F) is not always contained in the window
897 tree of F when this function is called asynchronously from
898 note_mouse_highlight. The original loop didn't terminate in this
902 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
905 enum window_part
*part
;
910 struct check_window_data cw
;
911 enum window_part dummy
;
917 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
918 foreach_window (f
, check_window_containing
, &cw
);
920 /* If not found above, see if it's in the tool bar window, if a tool
924 && WINDOWP (f
->tool_bar_window
)
925 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
926 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
930 window
= f
->tool_bar_window
;
939 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
940 doc
: /* Return window containing coordinates X and Y on FRAME.
941 If omitted, FRAME defaults to the currently selected frame.
942 The top left corner of the frame is considered to be row 0,
945 Lisp_Object x
, y
, frame
;
950 frame
= selected_frame
;
951 CHECK_LIVE_FRAME (frame
);
954 /* Check that arguments are integers or floats. */
955 CHECK_NUMBER_OR_FLOAT (x
);
956 CHECK_NUMBER_OR_FLOAT (y
);
958 return window_from_coordinates (f
,
959 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
960 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
961 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
962 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
966 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
967 doc
: /* Return current value of point in WINDOW.
968 For a nonselected window, this is the value point would have
969 if that window were selected.
971 Note that, when WINDOW is the selected window and its buffer
972 is also currently selected, the value returned is the same as (point).
973 It would be more strictly correct to return the `top-level' value
974 of point, outside of any save-excursion forms.
975 But that is hard to define. */)
979 register struct window
*w
= decode_window (window
);
981 if (w
== XWINDOW (selected_window
)
982 && current_buffer
== XBUFFER (w
->buffer
))
984 return Fmarker_position (w
->pointm
);
987 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
988 doc
: /* Return position at which display currently starts in WINDOW.
989 This is updated by redisplay or by calling `set-window-start'. */)
993 return Fmarker_position (decode_window (window
)->start
);
996 /* This is text temporarily removed from the doc string below.
998 This function returns nil if the position is not currently known.
999 That happens when redisplay is preempted and doesn't finish.
1000 If in that case you want to compute where the end of the window would
1001 have been if redisplay had finished, do this:
1003 (goto-char (window-start window))
1004 (vertical-motion (1- (window-height window)) window)
1007 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1008 doc
: /* Return position at which display currently ends in WINDOW.
1009 This is updated by redisplay, when it runs to completion.
1010 Simply changing the buffer text or setting `window-start'
1011 does not update this value.
1012 Return nil if there is no recorded value. \(This can happen if the
1013 last redisplay of WINDOW was preempted, and did not finish.)
1014 If UPDATE is non-nil, compute the up-to-date position
1015 if it isn't already recorded. */)
1017 Lisp_Object window
, update
;
1020 struct window
*w
= decode_window (window
);
1026 #if 0 /* This change broke some things. We should make it later. */
1027 /* If we don't know the end position, return nil.
1028 The user can compute it with vertical-motion if he wants to.
1029 It would be nicer to do it automatically,
1030 but that's so slow that it would probably bother people. */
1031 if (NILP (w
->window_end_valid
))
1036 && ! (! NILP (w
->window_end_valid
)
1037 && XFASTINT (w
->last_modified
) >= MODIFF
)
1040 struct text_pos startp
;
1042 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
1044 /* In case W->start is out of the range, use something
1045 reasonable. This situation occurred when loading a file with
1046 `-l' containing a call to `rmail' with subsequent other
1047 commands. At the end, W->start happened to be BEG, while
1048 rmail had already narrowed the buffer. */
1049 if (XMARKER (w
->start
)->charpos
< BEGV
)
1050 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1051 else if (XMARKER (w
->start
)->charpos
> ZV
)
1052 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1054 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1056 /* Cannot use Fvertical_motion because that function doesn't
1057 cope with variable-height lines. */
1058 if (b
!= current_buffer
)
1060 old_buffer
= current_buffer
;
1061 set_buffer_internal (b
);
1064 start_display (&it
, w
, startp
);
1065 move_it_vertically (&it
, window_box_height (w
));
1066 if (it
.current_y
< it
.last_visible_y
)
1067 move_it_past_eol (&it
);
1068 value
= make_number (IT_CHARPOS (it
));
1071 set_buffer_internal (old_buffer
);
1074 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
1079 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1080 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1083 Lisp_Object window
, pos
;
1085 register struct window
*w
= decode_window (window
);
1087 CHECK_NUMBER_COERCE_MARKER (pos
);
1088 if (w
== XWINDOW (selected_window
)
1089 && XBUFFER (w
->buffer
) == current_buffer
)
1092 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1094 /* We have to make sure that redisplay updates the window to show
1095 the new value of point. */
1096 if (!EQ (window
, selected_window
))
1097 ++windows_or_buffers_changed
;
1102 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1103 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1105 Optional third arg NOFORCE non-nil inhibits next redisplay
1106 from overriding motion of point in order to display at this exact start. */)
1107 (window
, pos
, noforce
)
1108 Lisp_Object window
, pos
, noforce
;
1110 register struct window
*w
= decode_window (window
);
1112 CHECK_NUMBER_COERCE_MARKER (pos
);
1113 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1114 /* this is not right, but much easier than doing what is right. */
1115 w
->start_at_line_beg
= Qnil
;
1117 w
->force_start
= Qt
;
1118 w
->update_mode_line
= Qt
;
1119 XSETFASTINT (w
->last_modified
, 0);
1120 XSETFASTINT (w
->last_overlay_modified
, 0);
1121 if (!EQ (window
, selected_window
))
1122 windows_or_buffers_changed
++;
1127 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1129 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1130 See also `set-window-dedicated-p'. */)
1134 return decode_window (window
)->dedicated
;
1137 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1138 Sset_window_dedicated_p
, 2, 2, 0,
1139 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1140 If it is dedicated, Emacs will not automatically change
1141 which buffer appears in it.
1142 The second argument is the new value for the dedication flag;
1143 non-nil means yes. */)
1145 Lisp_Object window
, arg
;
1147 register struct window
*w
= decode_window (window
);
1151 return w
->dedicated
;
1154 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1156 doc
: /* Return the display-table that WINDOW is using. */)
1160 return decode_window (window
)->display_table
;
1163 /* Get the display table for use on window W. This is either W's
1164 display table or W's buffer's display table. Ignore the specified
1165 tables if they are not valid; if no valid table is specified,
1168 struct Lisp_Char_Table
*
1169 window_display_table (w
)
1172 struct Lisp_Char_Table
*dp
= NULL
;
1174 if (DISP_TABLE_P (w
->display_table
))
1175 dp
= XCHAR_TABLE (w
->display_table
);
1176 else if (BUFFERP (w
->buffer
))
1178 struct buffer
*b
= XBUFFER (w
->buffer
);
1180 if (DISP_TABLE_P (b
->display_table
))
1181 dp
= XCHAR_TABLE (b
->display_table
);
1182 else if (DISP_TABLE_P (Vstandard_display_table
))
1183 dp
= XCHAR_TABLE (Vstandard_display_table
);
1189 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1190 doc
: /* Set WINDOW's display-table to TABLE. */)
1192 register Lisp_Object window
, table
;
1194 register struct window
*w
;
1196 w
= decode_window (window
);
1197 w
->display_table
= table
;
1201 /* Record info on buffer window w is displaying
1202 when it is about to cease to display that buffer. */
1205 register struct window
*w
;
1212 if (b
!= XMARKER (w
->pointm
)->buffer
)
1216 if (w
== XWINDOW (selected_window
)
1217 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1218 /* Do this except when the selected window's buffer
1219 is being removed from some other window. */
1221 /* last_window_start records the start position that this buffer
1222 had in the last window to be disconnected from it.
1223 Now that this statement is unconditional,
1224 it is possible for the buffer to be displayed in the
1225 selected window, while last_window_start reflects another
1226 window which was recently showing the same buffer.
1227 Some people might say that might be a good thing. Let's see. */
1228 b
->last_window_start
= marker_position (w
->start
);
1230 /* Point in the selected window's buffer
1231 is actually stored in that buffer, and the window's pointm isn't used.
1232 So don't clobber point in that buffer. */
1233 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1234 /* This line helps to fix Horsley's testbug.el bug. */
1235 && !(WINDOWP (b
->last_selected_window
)
1236 && w
!= XWINDOW (b
->last_selected_window
)
1237 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1238 temp_set_point_both (b
,
1239 clip_to_bounds (BUF_BEGV (b
),
1240 XMARKER (w
->pointm
)->charpos
,
1242 clip_to_bounds (BUF_BEGV_BYTE (b
),
1243 marker_byte_position (w
->pointm
),
1246 if (WINDOWP (b
->last_selected_window
)
1247 && w
== XWINDOW (b
->last_selected_window
))
1248 b
->last_selected_window
= Qnil
;
1251 /* Put replacement into the window structure in place of old. */
1253 replace_window (old
, replacement
)
1254 Lisp_Object old
, replacement
;
1256 register Lisp_Object tem
;
1257 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1259 /* If OLD is its frame's root_window, then replacement is the new
1260 root_window for that frame. */
1262 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1263 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1265 p
->left_col
= o
->left_col
;
1266 p
->top_line
= o
->top_line
;
1267 p
->total_cols
= o
->total_cols
;
1268 p
->total_lines
= o
->total_lines
;
1269 p
->desired_matrix
= p
->current_matrix
= 0;
1271 bzero (&p
->cursor
, sizeof (p
->cursor
));
1272 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1273 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1274 p
->phys_cursor_type
= -1;
1275 p
->phys_cursor_width
= -1;
1276 p
->must_be_updated_p
= 0;
1277 p
->pseudo_window_p
= 0;
1278 XSETFASTINT (p
->window_end_vpos
, 0);
1279 XSETFASTINT (p
->window_end_pos
, 0);
1280 p
->window_end_valid
= Qnil
;
1281 p
->frozen_window_start_p
= 0;
1282 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1284 p
->next
= tem
= o
->next
;
1286 XWINDOW (tem
)->prev
= replacement
;
1288 p
->prev
= tem
= o
->prev
;
1290 XWINDOW (tem
)->next
= replacement
;
1292 p
->parent
= tem
= o
->parent
;
1295 if (EQ (XWINDOW (tem
)->vchild
, old
))
1296 XWINDOW (tem
)->vchild
= replacement
;
1297 if (EQ (XWINDOW (tem
)->hchild
, old
))
1298 XWINDOW (tem
)->hchild
= replacement
;
1301 /*** Here, if replacement is a vertical combination
1302 and so is its new parent, we should make replacement's
1303 children be children of that parent instead. ***/
1306 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1307 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1309 register Lisp_Object window
;
1311 delete_window (window
);
1313 if (! NILP (Vwindow_configuration_change_hook
)
1314 && ! NILP (Vrun_hooks
))
1315 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1321 delete_window (window
)
1322 register Lisp_Object window
;
1324 register Lisp_Object tem
, parent
, sib
;
1325 register struct window
*p
;
1326 register struct window
*par
;
1329 /* Because this function is called by other C code on non-leaf
1330 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1331 so we can't decode_window here. */
1333 window
= selected_window
;
1335 CHECK_WINDOW (window
);
1336 p
= XWINDOW (window
);
1338 /* It's okay to delete an already-deleted window. */
1339 if (NILP (p
->buffer
)
1341 && NILP (p
->vchild
))
1346 error ("Attempt to delete minibuffer or sole ordinary window");
1347 par
= XWINDOW (parent
);
1349 windows_or_buffers_changed
++;
1350 Vwindow_list
= Qnil
;
1351 f
= XFRAME (WINDOW_FRAME (p
));
1352 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1354 /* Are we trying to delete any frame's selected window? */
1356 Lisp_Object swindow
, pwindow
;
1358 /* See if the frame's selected window is either WINDOW
1359 or any subwindow of it, by finding all that window's parents
1360 and comparing each one with WINDOW. */
1361 swindow
= FRAME_SELECTED_WINDOW (f
);
1366 while (!NILP (pwindow
))
1368 if (EQ (window
, pwindow
))
1370 pwindow
= XWINDOW (pwindow
)->parent
;
1373 /* If the window being deleted is not a parent of SWINDOW,
1374 then SWINDOW is ok as the new selected window. */
1375 if (!EQ (window
, pwindow
))
1377 /* Otherwise, try another window for SWINDOW. */
1378 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1380 /* If we get back to the frame's selected window,
1381 it means there was no acceptable alternative,
1382 so we cannot delete. */
1383 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1384 error ("Cannot delete window");
1387 /* If we need to change SWINDOW, do it. */
1388 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1390 /* If we're about to delete the selected window on the
1391 selected frame, then we should use Fselect_window to select
1392 the new window. On the other hand, if we're about to
1393 delete the selected window on any other frame, we shouldn't do
1394 anything but set the frame's selected_window slot. */
1395 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1396 Fselect_window (swindow
, Qnil
);
1398 FRAME_SELECTED_WINDOW (f
) = swindow
;
1403 /* tem is null for dummy parent windows
1404 (which have inferiors but not any contents themselves) */
1408 unchain_marker (XMARKER (p
->pointm
));
1409 unchain_marker (XMARKER (p
->start
));
1412 /* Free window glyph matrices. It is sure that they are allocated
1413 again when ADJUST_GLYPHS is called. Block input so that expose
1414 events and other events that access glyph matrices are not
1415 processed while we are changing them. */
1417 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1421 XWINDOW (tem
)->prev
= p
->prev
;
1425 XWINDOW (tem
)->next
= p
->next
;
1427 if (EQ (window
, par
->hchild
))
1428 par
->hchild
= p
->next
;
1429 if (EQ (window
, par
->vchild
))
1430 par
->vchild
= p
->next
;
1432 /* Find one of our siblings to give our space to. */
1436 /* If p gives its space to its next sibling, that sibling needs
1437 to have its top/left side pulled back to where p's is.
1438 set_window_{height,width} will re-position the sibling's
1441 XWINDOW (sib
)->top_line
= p
->top_line
;
1442 XWINDOW (sib
)->left_col
= p
->left_col
;
1445 /* Stretch that sibling. */
1446 if (!NILP (par
->vchild
))
1447 set_window_height (sib
,
1448 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1450 if (!NILP (par
->hchild
))
1451 set_window_width (sib
,
1452 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1455 /* If parent now has only one child,
1456 put the child into the parent's place. */
1460 if (NILP (XWINDOW (tem
)->next
)) {
1461 replace_window (parent
, tem
);
1462 par
= XWINDOW (tem
);
1465 /* Since we may be deleting combination windows, we must make sure that
1466 not only p but all its children have been marked as deleted. */
1467 if (! NILP (p
->hchild
))
1468 delete_all_subwindows (XWINDOW (p
->hchild
));
1469 else if (! NILP (p
->vchild
))
1470 delete_all_subwindows (XWINDOW (p
->vchild
));
1472 /* Mark this window as deleted. */
1473 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1475 if (! NILP (par
->parent
))
1476 par
= XWINDOW (par
->parent
);
1478 /* Check if we have a v/hchild with a v/hchild. In that case remove
1481 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1483 p
= XWINDOW (par
->vchild
);
1484 par
->vchild
= p
->vchild
;
1487 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1489 p
= XWINDOW (par
->hchild
);
1490 par
->hchild
= p
->hchild
;
1498 while (! NILP (tem
)) {
1499 XWINDOW (tem
)->parent
= p
->parent
;
1500 if (NILP (XWINDOW (tem
)->next
))
1502 tem
= XWINDOW (tem
)->next
;
1505 /* The next of the v/hchild we are removing is now the next of the
1506 last child for the v/hchild:
1507 Before v/hchild -> v/hchild -> next1 -> next2
1510 After: v/hchild -> next1 -> next2 -> next3
1512 XWINDOW (tem
)->next
= p
->next
;
1513 if (! NILP (p
->next
))
1514 XWINDOW (p
->next
)->prev
= tem
;
1516 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1520 /* Adjust glyph matrices. */
1527 /***********************************************************************
1529 ***********************************************************************/
1531 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1532 pointer. This is a callback function for foreach_window, used in
1533 function window_list. */
1536 add_window_to_list (w
, user_data
)
1540 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1542 XSETWINDOW (window
, w
);
1543 *list
= Fcons (window
, *list
);
1548 /* Return a list of all windows, for use by next_window. If
1549 Vwindow_list is a list, return that list. Otherwise, build a new
1550 list, cache it in Vwindow_list, and return that. */
1555 if (!CONSP (Vwindow_list
))
1559 Vwindow_list
= Qnil
;
1560 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1562 Lisp_Object args
[2];
1564 /* We are visiting windows in canonical order, and add
1565 new windows at the front of args[1], which means we
1566 have to reverse this list at the end. */
1568 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1569 args
[0] = Vwindow_list
;
1570 args
[1] = Fnreverse (args
[1]);
1571 Vwindow_list
= Fnconc (2, args
);
1575 return Vwindow_list
;
1579 /* Value is non-zero if WINDOW satisfies the constraints given by
1580 OWINDOW, MINIBUF and ALL_FRAMES.
1582 MINIBUF t means WINDOW may be minibuffer windows.
1583 `lambda' means WINDOW may not be a minibuffer window.
1584 a window means a specific minibuffer window
1586 ALL_FRAMES t means search all frames,
1587 nil means search just current frame,
1588 `visible' means search just visible frames,
1589 0 means search visible and iconified frames,
1590 a window means search the frame that window belongs to,
1591 a frame means consider windows on that frame, only. */
1594 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1595 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1597 struct window
*w
= XWINDOW (window
);
1598 struct frame
*f
= XFRAME (w
->frame
);
1599 int candidate_p
= 1;
1601 if (!BUFFERP (w
->buffer
))
1603 else if (MINI_WINDOW_P (w
)
1604 && (EQ (minibuf
, Qlambda
)
1605 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1607 /* If MINIBUF is `lambda' don't consider any mini-windows.
1608 If it is a window, consider only that one. */
1611 else if (EQ (all_frames
, Qt
))
1613 else if (NILP (all_frames
))
1615 xassert (WINDOWP (owindow
));
1616 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1618 else if (EQ (all_frames
, Qvisible
))
1620 FRAME_SAMPLE_VISIBILITY (f
);
1621 candidate_p
= FRAME_VISIBLE_P (f
);
1623 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1625 FRAME_SAMPLE_VISIBILITY (f
);
1626 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1628 else if (WINDOWP (all_frames
))
1629 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1630 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1631 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1632 else if (FRAMEP (all_frames
))
1633 candidate_p
= EQ (all_frames
, w
->frame
);
1639 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1640 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1644 decode_next_window_args (window
, minibuf
, all_frames
)
1645 Lisp_Object
*window
, *minibuf
, *all_frames
;
1648 *window
= selected_window
;
1650 CHECK_LIVE_WINDOW (*window
);
1652 /* MINIBUF nil may or may not include minibuffers. Decide if it
1654 if (NILP (*minibuf
))
1655 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1656 else if (!EQ (*minibuf
, Qt
))
1659 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1660 => count none of them, or a specific minibuffer window (the
1661 active one) to count. */
1663 /* ALL_FRAMES nil doesn't specify which frames to include. */
1664 if (NILP (*all_frames
))
1665 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1666 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1668 else if (EQ (*all_frames
, Qvisible
))
1670 else if (EQ (*all_frames
, make_number (0)))
1672 else if (FRAMEP (*all_frames
))
1674 else if (!EQ (*all_frames
, Qt
))
1677 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1678 search just current frame, `visible' meaning search just visible
1679 frames, 0 meaning search visible and iconified frames, or a
1680 window, meaning search the frame that window belongs to, or a
1681 frame, meaning consider windows on that frame, only. */
1685 /* Return the next or previous window of WINDOW in canonical ordering
1686 of windows. NEXT_P non-zero means return the next window. See the
1687 documentation string of next-window for the meaning of MINIBUF and
1691 next_window (window
, minibuf
, all_frames
, next_p
)
1692 Lisp_Object window
, minibuf
, all_frames
;
1695 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1697 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1698 return the first window on the frame. */
1699 if (FRAMEP (all_frames
)
1700 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1701 return Fframe_first_window (all_frames
);
1707 /* Find WINDOW in the list of all windows. */
1708 list
= Fmemq (window
, window_list ());
1710 /* Scan forward from WINDOW to the end of the window list. */
1712 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1713 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1716 /* Scan from the start of the window list up to WINDOW. */
1718 for (list
= Vwindow_list
;
1719 CONSP (list
) && !EQ (XCAR (list
), window
);
1721 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1725 window
= XCAR (list
);
1729 Lisp_Object candidate
, list
;
1731 /* Scan through the list of windows for candidates. If there are
1732 candidate windows in front of WINDOW, the last one of these
1733 is the one we want. If there are candidates following WINDOW
1734 in the list, again the last one of these is the one we want. */
1736 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1738 if (EQ (XCAR (list
), window
))
1740 if (WINDOWP (candidate
))
1743 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1745 candidate
= XCAR (list
);
1748 if (WINDOWP (candidate
))
1756 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1757 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1758 If omitted, WINDOW defaults to the selected window.
1760 Optional second arg MINIBUF t means count the minibuffer window even
1761 if not active. MINIBUF nil or omitted means count the minibuffer iff
1762 it is active. MINIBUF neither t nor nil means not to count the
1763 minibuffer even if it is active.
1765 Several frames may share a single minibuffer; if the minibuffer
1766 counts, all windows on all frames that share that minibuffer count
1767 too. Therefore, `next-window' can be used to iterate through the
1768 set of windows even when the minibuffer is on another frame. If the
1769 minibuffer does not count, only windows from WINDOW's frame count.
1771 Optional third arg ALL-FRAMES t means include windows on all frames.
1772 ALL-FRAMES nil or omitted means cycle within the frames as specified
1773 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1774 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1775 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1776 Anything else means restrict to WINDOW's frame.
1778 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1779 `next-window' to iterate through the entire cycle of acceptable
1780 windows, eventually ending up back at the window you started with.
1781 `previous-window' traverses the same cycle, in the reverse order. */)
1782 (window
, minibuf
, all_frames
)
1783 Lisp_Object window
, minibuf
, all_frames
;
1785 return next_window (window
, minibuf
, all_frames
, 1);
1789 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1790 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1791 If omitted, WINDOW defaults to the selected window.
1793 Optional second arg MINIBUF t means count the minibuffer window even
1794 if not active. MINIBUF nil or omitted means count the minibuffer iff
1795 it is active. MINIBUF neither t nor nil means not to count the
1796 minibuffer even if it is active.
1798 Several frames may share a single minibuffer; if the minibuffer
1799 counts, all windows on all frames that share that minibuffer count
1800 too. Therefore, `previous-window' can be used to iterate through
1801 the set of windows even when the minibuffer is on another frame. If
1802 the minibuffer does not count, only windows from WINDOW's frame count
1804 Optional third arg ALL-FRAMES t means include windows on all frames.
1805 ALL-FRAMES nil or omitted means cycle within the frames as specified
1806 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1807 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1808 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1809 Anything else means restrict to WINDOW's frame.
1811 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1812 `previous-window' to iterate through the entire cycle of acceptable
1813 windows, eventually ending up back at the window you started with.
1814 `next-window' traverses the same cycle, in the reverse order. */)
1815 (window
, minibuf
, all_frames
)
1816 Lisp_Object window
, minibuf
, all_frames
;
1818 return next_window (window
, minibuf
, all_frames
, 0);
1822 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1823 doc
: /* Select the ARG'th different window on this frame.
1824 All windows on current frame are arranged in a cyclic order.
1825 This command selects the window ARG steps away in that order.
1826 A negative ARG moves in the opposite order. The optional second
1827 argument ALL_FRAMES has the same meaning as in `next-window', which see. */)
1829 Lisp_Object arg
, all_frames
;
1835 window
= selected_window
;
1837 for (i
= XINT (arg
); i
> 0; --i
)
1838 window
= Fnext_window (window
, Qnil
, all_frames
);
1840 window
= Fprevious_window (window
, Qnil
, all_frames
);
1842 Fselect_window (window
, Qnil
);
1847 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1848 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
1849 FRAME nil or omitted means use the selected frame.
1850 WINDOW nil or omitted means use the selected window.
1851 MINIBUF t means include the minibuffer window, even if it isn't active.
1852 MINIBUF nil or omitted means include the minibuffer window only
1854 MINIBUF neither nil nor t means never include the minibuffer window. */)
1855 (frame
, minibuf
, window
)
1856 Lisp_Object frame
, minibuf
, window
;
1859 window
= selected_window
;
1861 frame
= selected_frame
;
1863 if (!EQ (frame
, XWINDOW (window
)->frame
))
1864 error ("Window is on a different frame");
1866 return window_list_1 (window
, minibuf
, frame
);
1870 /* Return a list of windows in canonical ordering. Arguments are like
1871 for `next-window'. */
1874 window_list_1 (window
, minibuf
, all_frames
)
1875 Lisp_Object window
, minibuf
, all_frames
;
1877 Lisp_Object tail
, list
, rest
;
1879 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1882 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1883 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1884 list
= Fcons (XCAR (tail
), list
);
1886 /* Rotate the list to start with WINDOW. */
1887 list
= Fnreverse (list
);
1888 rest
= Fmemq (window
, list
);
1889 if (!NILP (rest
) && !EQ (rest
, list
))
1891 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
1893 XSETCDR (tail
, Qnil
);
1894 list
= nconc2 (rest
, list
);
1901 /* Look at all windows, performing an operation specified by TYPE
1903 If FRAMES is Qt, look at all frames;
1904 Qnil, look at just the selected frame;
1905 Qvisible, look at visible frames;
1906 a frame, just look at windows on that frame.
1907 If MINI is non-zero, perform the operation on minibuffer windows too. */
1912 GET_BUFFER_WINDOW
, /* Arg is buffer */
1913 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1914 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1915 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1917 UNSHOW_BUFFER
, /* Arg is buffer */
1918 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
1923 window_loop (type
, obj
, mini
, frames
)
1924 enum window_loop type
;
1925 Lisp_Object obj
, frames
;
1928 Lisp_Object window
, windows
, best_window
, frame_arg
;
1930 struct gcpro gcpro1
;
1932 /* If we're only looping through windows on a particular frame,
1933 frame points to that frame. If we're looping through windows
1934 on all frames, frame is 0. */
1935 if (FRAMEP (frames
))
1936 f
= XFRAME (frames
);
1937 else if (NILP (frames
))
1938 f
= SELECTED_FRAME ();
1943 frame_arg
= Qlambda
;
1944 else if (EQ (frames
, make_number (0)))
1946 else if (EQ (frames
, Qvisible
))
1951 /* frame_arg is Qlambda to stick to one frame,
1952 Qvisible to consider all visible frames,
1955 /* Pick a window to start with. */
1959 window
= FRAME_SELECTED_WINDOW (f
);
1961 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1963 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1967 for (; CONSP (windows
); windows
= CDR (windows
))
1971 window
= XCAR (windows
);
1972 w
= XWINDOW (window
);
1974 /* Note that we do not pay attention here to whether the frame
1975 is visible, since Fwindow_list skips non-visible frames if
1976 that is desired, under the control of frame_arg. */
1977 if (!MINI_WINDOW_P (w
)
1978 /* For UNSHOW_BUFFER, we must always consider all windows. */
1979 || type
== UNSHOW_BUFFER
1980 || (mini
&& minibuf_level
> 0))
1983 case GET_BUFFER_WINDOW
:
1984 if (EQ (w
->buffer
, obj
)
1985 /* Don't find any minibuffer window
1986 except the one that is currently in use. */
1987 && (MINI_WINDOW_P (w
)
1988 ? EQ (window
, minibuf_window
)
1991 if (NILP (best_window
))
1992 best_window
= window
;
1993 else if (EQ (window
, selected_window
))
1994 /* For compatibility with 20.x, prefer to return
1996 best_window
= window
;
2000 case GET_LRU_WINDOW
:
2001 /* t as arg means consider only full-width windows */
2002 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
2004 /* Ignore dedicated windows and minibuffers. */
2005 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2007 if (NILP (best_window
)
2008 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2009 > XFASTINT (w
->use_time
)))
2010 best_window
= window
;
2013 case DELETE_OTHER_WINDOWS
:
2014 if (!EQ (window
, obj
))
2015 Fdelete_window (window
);
2018 case DELETE_BUFFER_WINDOWS
:
2019 if (EQ (w
->buffer
, obj
))
2021 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2023 /* If this window is dedicated, and in a frame of its own,
2025 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2026 && !NILP (w
->dedicated
)
2027 && other_visible_frames (f
))
2029 /* Skip the other windows on this frame.
2030 There might be one, the minibuffer! */
2031 while (CONSP (XCDR (windows
))
2032 && EQ (XWINDOW (XCAR (windows
))->frame
,
2033 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2034 windows
= XCDR (windows
);
2036 /* Now we can safely delete the frame. */
2037 Fdelete_frame (w
->frame
, Qnil
);
2039 else if (NILP (w
->parent
))
2041 /* If we're deleting the buffer displayed in the
2042 only window on the frame, find a new buffer to
2045 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2046 Fset_window_buffer (window
, buffer
, Qnil
);
2047 if (EQ (window
, selected_window
))
2048 Fset_buffer (w
->buffer
);
2051 Fdelete_window (window
);
2055 case GET_LARGEST_WINDOW
:
2057 /* Ignore dedicated windows and minibuffers. */
2058 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2061 if (NILP (best_window
))
2062 best_window
= window
;
2065 struct window
*b
= XWINDOW (best_window
);
2066 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2067 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2068 best_window
= window
;
2074 if (EQ (w
->buffer
, obj
))
2077 struct frame
*f
= XFRAME (w
->frame
);
2079 /* Find another buffer to show in this window. */
2080 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2082 /* If this window is dedicated, and in a frame of its own,
2084 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2085 && !NILP (w
->dedicated
)
2086 && other_visible_frames (f
))
2088 /* Skip the other windows on this frame.
2089 There might be one, the minibuffer! */
2090 while (CONSP (XCDR (windows
))
2091 && EQ (XWINDOW (XCAR (windows
))->frame
,
2092 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2093 windows
= XCDR (windows
);
2095 /* Now we can safely delete the frame. */
2096 Fdelete_frame (w
->frame
, Qnil
);
2098 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2101 XSETWINDOW (window
, w
);
2102 /* If this window is dedicated and not the only window
2103 in its frame, then kill it. */
2104 Fdelete_window (window
);
2108 /* Otherwise show a different buffer in the window. */
2109 w
->dedicated
= Qnil
;
2110 Fset_window_buffer (window
, buffer
, Qnil
);
2111 if (EQ (window
, selected_window
))
2112 Fset_buffer (w
->buffer
);
2117 case REDISPLAY_BUFFER_WINDOWS
:
2118 if (EQ (w
->buffer
, obj
))
2120 mark_window_display_accurate (window
, 0);
2121 w
->update_mode_line
= Qt
;
2122 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2123 ++update_mode_lines
;
2124 best_window
= window
;
2128 /* Check for a window that has a killed buffer. */
2129 case CHECK_ALL_WINDOWS
:
2130 if (! NILP (w
->buffer
)
2131 && NILP (XBUFFER (w
->buffer
)->name
))
2135 case WINDOW_LOOP_UNUSED
:
2144 /* Used for debugging. Abort if any window has a dead buffer. */
2147 check_all_windows ()
2149 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2152 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
2153 doc
: /* Return the window least recently selected or used for display.
2154 Return a full-width window if possible.
2155 A minibuffer window is never a candidate.
2156 A dedicated window is never a candidate, so if all windows are dedicated,
2158 If optional argument FRAME is `visible', search all visible frames.
2159 If FRAME is 0, search all visible and iconified frames.
2160 If FRAME is t, search all frames.
2161 If FRAME is nil, search only the selected frame.
2162 If FRAME is a frame, search only that frame. */)
2166 register Lisp_Object w
;
2167 /* First try for a window that is full-width */
2168 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
2169 if (!NILP (w
) && !EQ (w
, selected_window
))
2171 /* If none of them, try the rest */
2172 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
2175 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
2176 doc
: /* Return the largest window in area.
2177 A minibuffer window is never a candidate.
2178 A dedicated window is never a candidate, so if all windows are dedicated,
2180 If optional argument FRAME is `visible', search all visible frames.
2181 If FRAME is 0, search all visible and iconified frames.
2182 If FRAME is t, search all frames.
2183 If FRAME is nil, search only the selected frame.
2184 If FRAME is a frame, search only that frame. */)
2188 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
2192 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2193 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2194 BUFFER can be a buffer or a buffer name.
2195 If optional argument FRAME is `visible', search all visible frames.
2196 If optional argument FRAME is 0, search all visible and iconified frames.
2197 If FRAME is t, search all frames.
2198 If FRAME is nil, search only the selected frame.
2199 If FRAME is a frame, search only that frame. */)
2201 Lisp_Object buffer
, frame
;
2203 buffer
= Fget_buffer (buffer
);
2204 if (BUFFERP (buffer
))
2205 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2210 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2212 doc
: /* Make WINDOW (or the selected window) fill its frame.
2213 Only the frame WINDOW is on is affected.
2214 This function tries to reduce display jumps
2215 by keeping the text previously visible in WINDOW
2216 in the same place on the frame. Doing this depends on
2217 the value of (window-start WINDOW), so if calling this function
2218 in a program gives strange scrolling, make sure the window-start
2219 value is reasonable when this function is called. */)
2228 window
= selected_window
;
2230 CHECK_LIVE_WINDOW (window
);
2231 w
= XWINDOW (window
);
2233 startpos
= marker_position (w
->start
);
2234 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2236 if (MINI_WINDOW_P (w
) && top
> 0)
2237 error ("Can't expand minibuffer to full frame");
2239 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2241 /* Try to minimize scrolling, by setting the window start to the point
2242 will cause the text at the old window start to be at the same place
2243 on the frame. But don't try to do this if the window start is
2244 outside the visible portion (as might happen when the display is
2245 not current, due to typeahead). */
2246 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2248 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2249 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2251 struct position pos
;
2252 struct buffer
*obuf
= current_buffer
;
2254 Fset_buffer (w
->buffer
);
2255 /* This computation used to temporarily move point, but that can
2256 have unwanted side effects due to text properties. */
2257 pos
= *vmotion (startpos
, -top
, w
);
2259 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2260 w
->window_end_valid
= Qnil
;
2261 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2262 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2264 /* We need to do this, so that the window-scroll-functions
2266 w
->optional_new_start
= Qt
;
2268 set_buffer_internal (obuf
);
2274 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2275 1, 2, "bDelete windows on (buffer): ",
2276 doc
: /* Delete all windows showing BUFFER.
2277 BUFFER must be a buffer or the name of an existing buffer.
2278 Optional second argument FRAME controls which frames are affected.
2279 If optional argument FRAME is `visible', search all visible frames.
2280 If FRAME is 0, search all visible and iconified frames.
2281 If FRAME is nil, search all frames.
2282 If FRAME is t, search only the selected frame.
2283 If FRAME is a frame, search only that frame. */)
2285 Lisp_Object buffer
, frame
;
2287 /* FRAME uses t and nil to mean the opposite of what window_loop
2291 else if (EQ (frame
, Qt
))
2296 buffer
= Fget_buffer (buffer
);
2297 CHECK_BUFFER (buffer
);
2298 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2304 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2305 Sreplace_buffer_in_windows
,
2306 1, 1, "bReplace buffer in windows: ",
2307 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2308 BUFFER may be a buffer or the name of an existing buffer. */)
2314 buffer
= Fget_buffer (buffer
);
2315 CHECK_BUFFER (buffer
);
2316 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2321 /* Replace BUFFER with some other buffer in all windows
2322 of all frames, even those on other keyboards. */
2325 replace_buffer_in_all_windows (buffer
)
2329 Lisp_Object tail
, frame
;
2331 /* A single call to window_loop won't do the job
2332 because it only considers frames on the current keyboard.
2333 So loop manually over frames, and handle each one. */
2334 FOR_EACH_FRAME (tail
, frame
)
2335 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2337 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2341 /* Set the height of WINDOW and all its inferiors. */
2343 /* The smallest acceptable dimensions for a window. Anything smaller
2344 might crash Emacs. */
2346 #define MIN_SAFE_WINDOW_WIDTH (2)
2347 #define MIN_SAFE_WINDOW_HEIGHT (1)
2349 /* Make sure that window_min_height and window_min_width are
2350 not too small; if they are, set them to safe minima. */
2353 check_min_window_sizes ()
2355 /* Smaller values might permit a crash. */
2356 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2357 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2358 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2359 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2362 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2363 minimum allowable size. */
2366 check_frame_size (frame
, rows
, cols
)
2370 /* For height, we have to see:
2371 how many windows the frame has at minimum (one or two),
2372 and whether it has a menu bar or other special stuff at the top. */
2374 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2375 ? MIN_SAFE_WINDOW_HEIGHT
2376 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2378 if (FRAME_TOP_MARGIN (frame
) > 0)
2379 min_height
+= FRAME_TOP_MARGIN (frame
);
2381 if (*rows
< min_height
)
2383 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2384 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2388 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2389 check if W's width can be changed, otherwise check W's height.
2390 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2391 siblings, too. If none of the siblings is resizable, WINDOW isn't
2395 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2397 int width_p
, check_siblings_p
;
2402 if (!NILP (w
->hchild
))
2404 c
= XWINDOW (w
->hchild
);
2408 /* A horiz. combination is fixed-width if all of if its
2410 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2411 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2412 fixed_p
= c
== NULL
;
2416 /* A horiz. combination is fixed-height if one of if its
2418 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2419 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2420 fixed_p
= c
!= NULL
;
2423 else if (!NILP (w
->vchild
))
2425 c
= XWINDOW (w
->vchild
);
2429 /* A vert. combination is fixed-width if one of if its
2431 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2432 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2433 fixed_p
= c
!= NULL
;
2437 /* A vert. combination is fixed-height if all of if its
2439 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2440 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2441 fixed_p
= c
== NULL
;
2444 else if (BUFFERP (w
->buffer
))
2446 struct buffer
*old
= current_buffer
;
2449 current_buffer
= XBUFFER (w
->buffer
);
2450 val
= find_symbol_value (Qwindow_size_fixed
);
2451 current_buffer
= old
;
2454 if (!EQ (val
, Qunbound
))
2456 fixed_p
= !NILP (val
);
2459 && ((EQ (val
, Qheight
) && width_p
)
2460 || (EQ (val
, Qwidth
) && !width_p
)))
2464 /* Can't tell if this one is resizable without looking at
2465 siblings. If all siblings are fixed-size this one is too. */
2466 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2470 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2471 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2475 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2476 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2490 /* Return the minimum size of window W, not taking fixed-width windows
2491 into account. WIDTH_P non-zero means return the minimum width,
2492 otherwise return the minimum height. If W is a combination window,
2493 compute the minimum size from the minimum sizes of W's children. */
2496 window_min_size_1 (w
, width_p
)
2503 if (!NILP (w
->hchild
))
2505 c
= XWINDOW (w
->hchild
);
2510 /* The min width of a horizontal combination is
2511 the sum of the min widths of its children. */
2514 size
+= window_min_size_1 (c
, width_p
);
2515 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2520 /* The min height a horizontal combination equals
2521 the maximum of all min height of its children. */
2524 int min_size
= window_min_size_1 (c
, width_p
);
2525 size
= max (min_size
, size
);
2526 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2530 else if (!NILP (w
->vchild
))
2532 c
= XWINDOW (w
->vchild
);
2537 /* The min width of a vertical combination is
2538 the maximum of the min widths of its children. */
2541 int min_size
= window_min_size_1 (c
, width_p
);
2542 size
= max (min_size
, size
);
2543 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2548 /* The min height of a vertical combination equals
2549 the sum of the min height of its children. */
2552 size
+= window_min_size_1 (c
, width_p
);
2553 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2560 size
= window_min_width
;
2563 if (MINI_WINDOW_P (w
)
2564 || (!WINDOW_WANTS_MODELINE_P (w
)
2565 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2568 size
= window_min_height
;
2576 /* Return the minimum size of window W, taking fixed-size windows into
2577 account. WIDTH_P non-zero means return the minimum width,
2578 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2579 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2580 unless FIXED is null. */
2583 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2585 int width_p
, ignore_fixed_p
, *fixed
;
2592 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2598 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2600 size
= window_min_size_1 (w
, width_p
);
2606 /* Adjust the margins of window W if text area is too small.
2607 Return 1 if window width is ok after adjustment; 0 if window
2608 is still too narrow. */
2611 adjust_window_margins (w
)
2614 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2615 - WINDOW_FRINGE_COLS (w
)
2616 - WINDOW_SCROLL_BAR_COLS (w
));
2617 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2618 + WINDOW_RIGHT_MARGIN_COLS (w
));
2620 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2623 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2626 /* Window's text area is too narrow, but reducing the window
2627 margins will fix that. */
2628 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2629 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2631 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2632 w
->left_margin_cols
= w
->right_margin_cols
2633 = make_number (margin_cols
/2);
2635 w
->right_margin_cols
= make_number (margin_cols
);
2638 w
->left_margin_cols
= make_number (margin_cols
);
2642 /* Calculate new sizes for windows in the list FORWARD when the window size
2643 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2644 The number of windows in FORWARD is NCHILDREN, and the number that
2645 can shrink is SHRINKABLE.
2646 The minimum size a window can have is MIN_SIZE.
2647 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2648 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2651 This function returns an allocated array of new sizes that the caller
2652 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2653 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2654 the second, and so on.
2656 This function tries to keep windows at least at the minimum size
2657 and resize other windows before it resizes any window to zero (i.e.
2658 delete that window).
2660 Windows are resized proportional to their size, so bigger windows
2661 shrink more than smaller windows. */
2663 shrink_windows (total
, size
, nchildren
, shrinkable
,
2664 min_size
, resize_fixed_p
, forward
, width_p
)
2665 int total
, size
, nchildren
, shrinkable
, min_size
;
2666 int resize_fixed_p
, width_p
;
2667 Lisp_Object forward
;
2669 int available_resize
= 0;
2673 int smallest
= total
;
2674 int total_removed
= 0;
2675 int total_shrink
= total
- size
;
2678 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2680 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2684 c
= XWINDOW (child
);
2685 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2687 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2691 new_sizes
[i
] = child_size
;
2692 if (child_size
> min_size
)
2693 available_resize
+= child_size
- min_size
;
2696 /* We might need to shrink some windows to zero. Find the smallest
2697 windows and set them to 0 until we can fulfil the new size. */
2699 while (shrinkable
> 1 && size
+ available_resize
< total
)
2701 for (i
= 0; i
< nchildren
; ++i
)
2702 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2703 smallest
= new_sizes
[i
];
2705 for (i
= 0; i
< nchildren
; ++i
)
2706 if (new_sizes
[i
] == smallest
)
2708 /* Resize this window down to zero. */
2710 if (smallest
> min_size
)
2711 available_resize
-= smallest
- min_size
;
2712 available_resize
+= smallest
;
2714 total_removed
+= smallest
;
2716 /* We don't know what the smallest is now. */
2719 /* Out of for, just remove one window at the time and
2720 check again if we have enough space. */
2725 /* Now, calculate the new sizes. Try to shrink each window
2726 proportional to its size. */
2727 for (i
= 0; i
< nchildren
; ++i
)
2729 if (new_sizes
[i
] > min_size
)
2731 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2732 if (new_sizes
[i
] - to_shrink
< min_size
)
2733 to_shrink
= new_sizes
[i
] - min_size
;
2734 new_sizes
[i
] -= to_shrink
;
2735 total_removed
+= to_shrink
;
2739 /* Any reminder due to rounding, we just subtract from windows
2740 that are left and still can be shrunk. */
2741 while (total_shrink
> total_removed
)
2743 int nonzero_sizes
= 0;
2744 int nonzero_idx
= -1;
2746 for (i
= 0; i
< nchildren
; ++i
)
2747 if (new_sizes
[i
] > 0)
2753 for (i
= 0; i
< nchildren
; ++i
)
2754 if (new_sizes
[i
] > min_size
)
2759 /* Out of for, just shrink one window at the time and
2760 check again if we have enough space. */
2765 /* Special case, only one window left. */
2766 if (nonzero_sizes
== 1)
2770 /* Any surplus due to rounding, we add to windows that are left. */
2771 while (total_shrink
< total_removed
)
2773 for (i
= 0; i
< nchildren
; ++i
)
2775 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2787 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2788 WINDOW's width. Resize WINDOW's children, if any, so that they
2789 keep their proportionate size relative to WINDOW. Propagate
2790 WINDOW's top or left edge position to children. Delete windows
2791 that become too small unless NODELETE_P is non-zero.
2793 If NODELETE_P is 2, that means we do delete windows that are
2794 too small, even if they were too small before! */
2797 size_window (window
, size
, width_p
, nodelete_p
)
2799 int size
, width_p
, nodelete_p
;
2801 struct window
*w
= XWINDOW (window
);
2803 Lisp_Object child
, *forward
, *sideward
;
2804 int old_size
, min_size
, safe_min_size
;
2806 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2807 seems like it's too soon to do this here. ++KFS. */
2808 if (nodelete_p
== 2)
2811 check_min_window_sizes ();
2812 size
= max (0, size
);
2814 /* If the window has been "too small" at one point,
2815 don't delete it for being "too small" in the future.
2816 Preserve it as long as that is at all possible. */
2819 old_size
= WINDOW_TOTAL_COLS (w
);
2820 min_size
= window_min_width
;
2821 /* Ensure that there is room for the scroll bar and fringes!
2822 We may reduce display margins though. */
2823 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
2824 + WINDOW_FRINGE_COLS (w
)
2825 + WINDOW_SCROLL_BAR_COLS (w
));
2829 old_size
= XINT (w
->total_lines
);
2830 min_size
= window_min_height
;
2831 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
2834 if (old_size
< min_size
&& nodelete_p
!= 2)
2835 w
->too_small_ok
= Qt
;
2837 /* Maybe delete WINDOW if it's too small. */
2838 if (nodelete_p
!= 1 && !NILP (w
->parent
))
2840 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2841 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2842 if (min_size
< safe_min_size
)
2843 min_size
= safe_min_size
;
2844 if (size
< min_size
)
2846 delete_window (window
);
2851 /* Set redisplay hints. */
2852 w
->last_modified
= make_number (0);
2853 w
->last_overlay_modified
= make_number (0);
2854 windows_or_buffers_changed
++;
2855 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2859 sideward
= &w
->vchild
;
2860 forward
= &w
->hchild
;
2861 w
->total_cols
= make_number (size
);
2862 adjust_window_margins (w
);
2866 sideward
= &w
->hchild
;
2867 forward
= &w
->vchild
;
2868 w
->total_lines
= make_number (size
);
2869 w
->orig_total_lines
= Qnil
;
2872 if (!NILP (*sideward
))
2874 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2876 c
= XWINDOW (child
);
2878 c
->left_col
= w
->left_col
;
2880 c
->top_line
= w
->top_line
;
2881 size_window (child
, size
, width_p
, nodelete_p
);
2884 else if (!NILP (*forward
))
2886 int fixed_size
, each
, extra
, n
;
2887 int resize_fixed_p
, nfixed
;
2888 int last_pos
, first_pos
, nchildren
, total
;
2889 int *new_sizes
= NULL
;
2891 /* Determine the fixed-size portion of the this window, and the
2892 number of child windows. */
2893 fixed_size
= nchildren
= nfixed
= total
= 0;
2894 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2898 c
= XWINDOW (child
);
2899 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2900 total
+= child_size
;
2902 if (window_fixed_size_p (c
, width_p
, 0))
2904 fixed_size
+= child_size
;
2909 /* If the new size is smaller than fixed_size, or if there
2910 aren't any resizable windows, allow resizing fixed-size
2912 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2914 /* Compute how many lines/columns to add/remove to each child. The
2915 value of extra takes care of rounding errors. */
2916 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2917 if (size
< total
&& n
> 1)
2918 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
2919 resize_fixed_p
, *forward
, width_p
);
2922 each
= (size
- total
) / n
;
2923 extra
= (size
- total
) - n
* each
;
2926 /* Compute new children heights and edge positions. */
2927 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
2928 last_pos
= first_pos
;
2929 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
2931 int new_size
, old_size
;
2933 c
= XWINDOW (child
);
2934 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
2935 new_size
= old_size
;
2937 /* The top or left edge position of this child equals the
2938 bottom or right edge of its predecessor. */
2940 c
->left_col
= make_number (last_pos
);
2942 c
->top_line
= make_number (last_pos
);
2944 /* If this child can be resized, do it. */
2945 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2947 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
2951 /* Set new height. Note that size_window also propagates
2952 edge positions to children, so it's not a no-op if we
2953 didn't change the child's size. */
2954 size_window (child
, new_size
, width_p
, 1);
2956 /* Remember the bottom/right edge position of this child; it
2957 will be used to set the top/left edge of the next child. */
2958 last_pos
+= new_size
;
2961 if (new_sizes
) xfree (new_sizes
);
2963 /* We should have covered the parent exactly with child windows. */
2964 xassert (size
== last_pos
- first_pos
);
2966 /* Now delete any children that became too small. */
2968 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2971 c
= XWINDOW (child
);
2972 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2973 size_window (child
, child_size
, width_p
, 2);
2978 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2979 WINDOW's children. NODELETE non-zero means don't delete windows
2980 that become too small in the process. (The caller should check
2981 later and do so if appropriate.) */
2984 set_window_height (window
, height
, nodelete
)
2989 size_window (window
, height
, 0, nodelete
);
2993 /* Set WINDOW's width to WIDTH, and recursively change the width of
2994 WINDOW's children. NODELETE non-zero means don't delete windows
2995 that become too small in the process. (The caller should check
2996 later and do so if appropriate.) */
2999 set_window_width (window
, width
, nodelete
)
3004 size_window (window
, width
, 1, nodelete
);
3007 /* Change window heights in windows rooted in WINDOW by N lines. */
3010 change_window_heights (window
, n
)
3014 struct window
*w
= XWINDOW (window
);
3016 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3017 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3019 if (INTEGERP (w
->orig_top_line
))
3020 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3021 if (INTEGERP (w
->orig_total_lines
))
3022 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3024 /* Handle just the top child in a vertical split. */
3025 if (!NILP (w
->vchild
))
3026 change_window_heights (w
->vchild
, n
);
3028 /* Adjust all children in a horizontal split. */
3029 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3031 w
= XWINDOW (window
);
3032 change_window_heights (window
, n
);
3037 int window_select_count
;
3040 Fset_window_buffer_unwind (obuf
)
3047 EXFUN (Fset_window_fringes
, 4);
3048 EXFUN (Fset_window_scroll_bars
, 4);
3050 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3051 means it's allowed to run hooks. See make_frame for a case where
3052 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3053 margins, fringes, and scroll-bar settings of the window are not
3054 reset from the buffer's local settings. */
3057 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3058 Lisp_Object window
, buffer
;
3059 int run_hooks_p
, keep_margins_p
;
3061 struct window
*w
= XWINDOW (window
);
3062 struct buffer
*b
= XBUFFER (buffer
);
3063 int count
= SPECPDL_INDEX ();
3067 if (EQ (window
, selected_window
))
3068 b
->last_selected_window
= window
;
3070 /* Let redisplay errors through. */
3071 b
->display_error_modiff
= 0;
3073 /* Update time stamps of buffer display. */
3074 if (INTEGERP (b
->display_count
))
3075 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3076 b
->display_time
= Fcurrent_time ();
3078 XSETFASTINT (w
->window_end_pos
, 0);
3079 XSETFASTINT (w
->window_end_vpos
, 0);
3080 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3081 w
->window_end_valid
= Qnil
;
3082 w
->hscroll
= w
->min_hscroll
= make_number (0);
3084 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3085 set_marker_restricted (w
->start
,
3086 make_number (b
->last_window_start
),
3088 w
->start_at_line_beg
= Qnil
;
3089 w
->force_start
= Qnil
;
3090 XSETFASTINT (w
->last_modified
, 0);
3091 XSETFASTINT (w
->last_overlay_modified
, 0);
3092 windows_or_buffers_changed
++;
3094 /* We must select BUFFER for running the window-scroll-functions.
3095 If WINDOW is selected, switch permanently.
3096 Otherwise, switch but go back to the ambient buffer afterward. */
3097 if (EQ (window
, selected_window
))
3098 Fset_buffer (buffer
);
3099 /* We can't check ! NILP (Vwindow_scroll_functions) here
3100 because that might itself be a local variable. */
3101 else if (window_initialized
)
3103 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3104 Fset_buffer (buffer
);
3107 if (!keep_margins_p
)
3109 /* Set left and right marginal area width etc. from buffer. */
3111 /* This may call adjust_window_margins three times, so
3112 temporarily disable window margins. */
3113 Lisp_Object save_left
= w
->left_margin_cols
;
3114 Lisp_Object save_right
= w
->right_margin_cols
;
3116 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3118 Fset_window_fringes (window
,
3119 b
->left_fringe_width
, b
->right_fringe_width
,
3120 b
->fringes_outside_margins
);
3122 Fset_window_scroll_bars (window
,
3123 b
->scroll_bar_width
,
3124 b
->vertical_scroll_bar_type
, Qnil
);
3126 w
->left_margin_cols
= save_left
;
3127 w
->right_margin_cols
= save_right
;
3129 Fset_window_margins (window
,
3130 b
->left_margin_cols
, b
->right_margin_cols
);
3135 if (! NILP (Vwindow_scroll_functions
))
3136 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3137 Fmarker_position (w
->start
));
3139 if (! NILP (Vwindow_configuration_change_hook
)
3140 && ! NILP (Vrun_hooks
))
3141 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3144 unbind_to (count
, Qnil
);
3148 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3149 doc
: /* Make WINDOW display BUFFER as its contents.
3150 BUFFER can be a buffer or the name of an existing buffer.
3151 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3152 display margins, fringe widths, and scroll bar settings are maintained;
3153 the default is to reset these from BUFFER's local settings or the frame
3156 This function runs the hook `window-scroll-functions'. */)
3157 (window
, buffer
, keep_margins
)
3158 register Lisp_Object window
, buffer
, keep_margins
;
3160 register Lisp_Object tem
;
3161 register struct window
*w
= decode_window (window
);
3163 XSETWINDOW (window
, w
);
3164 buffer
= Fget_buffer (buffer
);
3165 CHECK_BUFFER (buffer
);
3167 if (NILP (XBUFFER (buffer
)->name
))
3168 error ("Attempt to display deleted buffer");
3172 error ("Window is deleted");
3173 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3174 is first being set up. */
3176 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3177 error ("Window is dedicated to `%s'",
3178 SDATA (XBUFFER (tem
)->name
));
3183 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3187 /* Note that selected_window can be nil
3188 when this is called from Fset_window_configuration. */
3190 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3191 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3192 If WINDOW is not already selected, make WINDOW's buffer current
3193 and make WINDOW the frame's selected window. Return WINDOW.
3194 Optional second arg NORECORD non-nil means
3195 do not put this buffer at the front of the list of recently selected ones.
3197 Note that the main editor command loop
3198 selects the buffer of the selected window before each command. */)
3200 register Lisp_Object window
, norecord
;
3202 register struct window
*w
;
3203 register struct window
*ow
;
3206 CHECK_LIVE_WINDOW (window
);
3208 w
= XWINDOW (window
);
3209 w
->frozen_window_start_p
= 0;
3211 ++window_select_count
;
3212 XSETFASTINT (w
->use_time
, window_select_count
);
3213 if (EQ (window
, selected_window
))
3216 /* Store the current buffer's actual point into the
3217 old selected window. It belongs to that window,
3218 and when the window is not selected, must be in the window. */
3219 if (!NILP (selected_window
))
3221 ow
= XWINDOW (selected_window
);
3222 if (! NILP (ow
->buffer
))
3223 set_marker_both (ow
->pointm
, ow
->buffer
,
3224 BUF_PT (XBUFFER (ow
->buffer
)),
3225 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3228 selected_window
= window
;
3229 sf
= SELECTED_FRAME ();
3230 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3232 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3233 /* Use this rather than Fhandle_switch_frame
3234 so that FRAME_FOCUS_FRAME is moved appropriately as we
3235 move around in the state where a minibuffer in a separate
3237 Fselect_frame (WINDOW_FRAME (w
));
3240 sf
->selected_window
= window
;
3242 if (NILP (norecord
))
3243 record_buffer (w
->buffer
);
3244 Fset_buffer (w
->buffer
);
3246 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3248 /* Go to the point recorded in the window.
3249 This is important when the buffer is in more
3250 than one window. It also matters when
3251 redisplay_window has altered point after scrolling,
3252 because it makes the change only in the window. */
3254 register int new_point
= marker_position (w
->pointm
);
3255 if (new_point
< BEGV
)
3257 else if (new_point
> ZV
)
3263 windows_or_buffers_changed
++;
3268 select_window_norecord (window
)
3271 return Fselect_window (window
, Qt
);
3274 /* Deiconify the frame containing the window WINDOW,
3275 unless it is the selected frame;
3278 The reason for the exception for the selected frame
3279 is that it seems better not to change the selected frames visibility
3280 merely because of displaying a different buffer in it.
3281 The deiconification is useful when a buffer gets shown in
3282 another frame that you were not using lately. */
3285 display_buffer_1 (window
)
3288 Lisp_Object frame
= XWINDOW (window
)->frame
;
3289 FRAME_PTR f
= XFRAME (frame
);
3291 FRAME_SAMPLE_VISIBILITY (f
);
3293 if (EQ (frame
, selected_frame
))
3294 ; /* Assume the selected frame is already visible enough. */
3295 else if (minibuf_level
> 0
3296 && MINI_WINDOW_P (XWINDOW (selected_window
))
3297 && WINDOW_LIVE_P (minibuf_selected_window
)
3298 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3299 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3302 if (FRAME_ICONIFIED_P (f
))
3303 Fmake_frame_visible (frame
);
3304 else if (FRAME_VISIBLE_P (f
))
3305 Fraise_frame (frame
);
3311 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3312 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3313 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3314 special frame for that buffer using the default frame parameters.
3316 If the value is a list, it is a list of frame parameters that would be used
3317 to make a frame for that buffer.
3318 The variables `special-display-buffer-names'
3319 and `special-display-regexps' control this. */)
3321 Lisp_Object buffer_name
;
3325 CHECK_STRING (buffer_name
);
3327 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3331 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3335 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3337 Lisp_Object car
= XCAR (tem
);
3339 && fast_string_match (car
, buffer_name
) >= 0)
3341 else if (CONSP (car
)
3342 && STRINGP (XCAR (car
))
3343 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3349 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3350 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3351 More precisely, if `display-buffer' or `pop-to-buffer' would display
3352 that buffer in the selected window rather than (as usual) in some other window.
3353 See `same-window-buffer-names' and `same-window-regexps'. */)
3355 Lisp_Object buffer_name
;
3359 CHECK_STRING (buffer_name
);
3361 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3365 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3369 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3371 Lisp_Object car
= XCAR (tem
);
3373 && fast_string_match (car
, buffer_name
) >= 0)
3375 else if (CONSP (car
)
3376 && STRINGP (XCAR (car
))
3377 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3383 /* Use B so the default is (other-buffer). */
3384 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3385 "BDisplay buffer: \nP",
3386 doc
: /* Make BUFFER appear in some window but don't select it.
3387 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3389 If BUFFER is shown already in some window, just use that one,
3390 unless the window is the selected window and the optional second
3391 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3392 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3393 Returns the window displaying BUFFER.
3394 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3395 displaying BUFFER, then simply raise that frame.
3397 The variables `special-display-buffer-names',
3398 `special-display-regexps', `same-window-buffer-names', and
3399 `same-window-regexps' customize how certain buffer names are handled.
3400 The latter two take effect only if NOT-THIS-WINDOW is t.
3402 If optional argument FRAME is `visible', search all visible frames.
3403 If FRAME is 0, search all visible and iconified frames.
3404 If FRAME is t, search all frames.
3405 If FRAME is a frame, search only that frame.
3406 If FRAME is nil, search only the selected frame
3407 (actually the last nonminibuffer frame),
3408 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3409 which means search visible and iconified frames.
3411 If a full-width window on a splittable frame is available to display
3412 the buffer, it may be split, subject to the value of the variable
3413 `split-height-threshold'.
3415 If `even-window-heights' is non-nil, window heights will be evened out
3416 if displaying the buffer causes two vertically adjacent windows to be
3418 (buffer
, not_this_window
, frame
)
3419 register Lisp_Object buffer
, not_this_window
, frame
;
3421 register Lisp_Object window
, tem
, swp
;
3425 buffer
= Fget_buffer (buffer
);
3426 CHECK_BUFFER (buffer
);
3428 if (!NILP (Vdisplay_buffer_function
))
3429 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3431 if (NILP (not_this_window
)
3432 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3433 return display_buffer_1 (selected_window
);
3435 /* See if the user has specified this buffer should appear
3436 in the selected window. */
3437 if (NILP (not_this_window
))
3439 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3440 if (!NILP (swp
) && !no_switch_window (selected_window
))
3442 Fswitch_to_buffer (buffer
, Qnil
);
3443 return display_buffer_1 (selected_window
);
3447 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3448 look for a window showing BUFFER on any visible or iconified frame.
3449 Otherwise search only the current frame. */
3452 else if (pop_up_frames
3453 || display_buffer_reuse_frames
3454 || last_nonminibuf_frame
== 0)
3455 XSETFASTINT (tem
, 0);
3457 XSETFRAME (tem
, last_nonminibuf_frame
);
3459 window
= Fget_buffer_window (buffer
, tem
);
3461 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3462 return display_buffer_1 (window
);
3464 /* Certain buffer names get special handling. */
3465 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3467 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3469 return call1 (Vspecial_display_function
, buffer
);
3471 return call2 (Vspecial_display_function
, buffer
, tem
);
3474 /* If there are no frames open that have more than a minibuffer,
3475 we need to create a new frame. */
3476 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3478 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3479 Fset_window_buffer (window
, buffer
, Qnil
);
3480 return display_buffer_1 (window
);
3483 f
= SELECTED_FRAME ();
3485 || FRAME_MINIBUF_ONLY_P (f
)
3486 /* If the current frame is a special display frame,
3487 don't try to reuse its windows. */
3488 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3493 if (FRAME_MINIBUF_ONLY_P (f
))
3494 XSETFRAME (frames
, last_nonminibuf_frame
);
3495 /* Don't try to create a window if we would get an error. */
3496 if (split_height_threshold
< window_min_height
<< 1)
3497 split_height_threshold
= window_min_height
<< 1;
3499 /* Note that both Fget_largest_window and Fget_lru_window
3500 ignore minibuffers and dedicated windows.
3501 This means they can return nil. */
3503 /* If the frame we would try to split cannot be split,
3504 try other frames. */
3505 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3507 /* Try visible frames first. */
3508 window
= Fget_largest_window (Qvisible
);
3509 /* If that didn't work, try iconified frames. */
3511 window
= Fget_largest_window (make_number (0));
3513 window
= Fget_largest_window (Qt
);
3516 window
= Fget_largest_window (frames
);
3518 /* If we got a tall enough full-width window that can be split,
3521 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3522 && window_height (window
) >= split_height_threshold
3523 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3524 window
= Fsplit_window (window
, Qnil
, Qnil
);
3527 Lisp_Object upper
, lower
, other
;
3529 window
= Fget_lru_window (frames
);
3530 /* If the LRU window is selected, and big enough,
3531 and can be split, split it. */
3533 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3534 && (EQ (window
, selected_window
)
3535 || EQ (XWINDOW (window
)->parent
, Qnil
))
3536 && window_height (window
) >= window_min_height
<< 1)
3537 window
= Fsplit_window (window
, Qnil
, Qnil
);
3538 /* If Fget_lru_window returned nil, try other approaches. */
3540 /* Try visible frames first. */
3542 window
= Fget_buffer_window (buffer
, Qvisible
);
3544 window
= Fget_largest_window (Qvisible
);
3545 /* If that didn't work, try iconified frames. */
3547 window
= Fget_buffer_window (buffer
, make_number (0));
3549 window
= Fget_largest_window (make_number (0));
3550 /* Try invisible frames. */
3552 window
= Fget_buffer_window (buffer
, Qt
);
3554 window
= Fget_largest_window (Qt
);
3555 /* As a last resort, make a new frame. */
3557 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3558 /* If window appears above or below another,
3559 even out their heights. */
3560 other
= upper
= lower
= Qnil
;
3561 if (!NILP (XWINDOW (window
)->prev
))
3562 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3563 if (!NILP (XWINDOW (window
)->next
))
3564 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3566 && !NILP (Veven_window_heights
)
3567 /* Check that OTHER and WINDOW are vertically arrayed. */
3568 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3569 && (XFASTINT (XWINDOW (other
)->total_lines
)
3570 > XFASTINT (XWINDOW (window
)->total_lines
)))
3572 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3573 + XFASTINT (XWINDOW (window
)->total_lines
));
3574 enlarge_window (upper
,
3575 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3581 window
= Fget_lru_window (Qnil
);
3583 Fset_window_buffer (window
, buffer
, Qnil
);
3584 return display_buffer_1 (window
);
3588 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3590 doc
: /* Force redisplay of all windows.
3591 If optional arg OBJECT is a window, force redisplay of that window only.
3592 If OBJECT is a buffer or buffer name, force redisplay of all windows
3593 displaying that buffer. */)
3599 windows_or_buffers_changed
++;
3600 update_mode_lines
++;
3604 if (WINDOWP (object
))
3606 struct window
*w
= XWINDOW (object
);
3607 mark_window_display_accurate (object
, 0);
3608 w
->update_mode_line
= Qt
;
3609 if (BUFFERP (w
->buffer
))
3610 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3611 ++update_mode_lines
;
3615 if (STRINGP (object
))
3616 object
= Fget_buffer (object
);
3617 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3619 /* Walk all windows looking for buffer, and force update
3620 of each of those windows. */
3622 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3623 return NILP (object
) ? Qnil
: Qt
;
3626 /* If nothing suitable was found, just return.
3627 We could signal an error, but this feature will typically be used
3628 asynchronously in timers or process sentinels, so we don't. */
3634 temp_output_buffer_show (buf
)
3635 register Lisp_Object buf
;
3637 register struct buffer
*old
= current_buffer
;
3638 register Lisp_Object window
;
3639 register struct window
*w
;
3641 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3644 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3648 #if 0 /* rms: there should be no reason for this. */
3649 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3651 set_buffer_internal (old
);
3653 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3654 call1 (Vtemp_buffer_show_function
, buf
);
3657 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3659 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3660 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3661 Vminibuf_scroll_window
= window
;
3662 w
= XWINDOW (window
);
3663 XSETFASTINT (w
->hscroll
, 0);
3664 XSETFASTINT (w
->min_hscroll
, 0);
3665 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3666 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3668 /* Run temp-buffer-show-hook, with the chosen window selected
3669 and its buffer current. */
3671 if (!NILP (Vrun_hooks
)
3672 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3673 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3675 int count
= SPECPDL_INDEX ();
3676 Lisp_Object prev_window
, prev_buffer
;
3677 prev_window
= selected_window
;
3678 XSETBUFFER (prev_buffer
, old
);
3680 /* Select the window that was chosen, for running the hook.
3681 Note: Both Fselect_window and select_window_norecord may
3682 set-buffer to the buffer displayed in the window,
3683 so we need to save the current buffer. --stef */
3684 record_unwind_protect (Fset_buffer
, prev_buffer
);
3685 record_unwind_protect (select_window_norecord
, prev_window
);
3686 Fselect_window (window
, Qt
);
3687 Fset_buffer (w
->buffer
);
3688 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3689 unbind_to (count
, Qnil
);
3695 make_dummy_parent (window
)
3699 register struct window
*o
, *p
;
3702 o
= XWINDOW (window
);
3703 p
= allocate_window ();
3704 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3705 ((struct Lisp_Vector
*) p
)->contents
[i
]
3706 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3707 XSETWINDOW (new, p
);
3710 XSETFASTINT (p
->sequence_number
, sequence_number
);
3712 /* Put new into window structure in place of window */
3713 replace_window (window
, new);
3726 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3727 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3728 WINDOW defaults to selected one and SIZE to half its size.
3729 If optional third arg HORFLAG is non-nil, split side by side
3730 and put SIZE columns in the first of the pair. In that case,
3731 SIZE includes that window's scroll bar, or the divider column to its right.
3732 Interactively, all arguments are nil.
3734 Returns the newly created window (which is the lower or rightmost one).
3735 The upper or leftmost window is the original one and remains selected.
3736 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3737 (window
, size
, horflag
)
3738 Lisp_Object window
, size
, horflag
;
3740 register Lisp_Object
new;
3741 register struct window
*o
, *p
;
3743 register int size_int
;
3746 window
= selected_window
;
3748 CHECK_LIVE_WINDOW (window
);
3750 o
= XWINDOW (window
);
3751 fo
= XFRAME (WINDOW_FRAME (o
));
3755 if (!NILP (horflag
))
3756 /* Calculate the size of the left-hand window, by dividing
3757 the usable space in columns by two.
3758 We round up, since the left-hand window may include
3759 a dividing line, while the right-hand may not. */
3760 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3762 size_int
= XFASTINT (o
->total_lines
) >> 1;
3766 CHECK_NUMBER (size
);
3767 size_int
= XINT (size
);
3770 if (MINI_WINDOW_P (o
))
3771 error ("Attempt to split minibuffer window");
3772 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3773 error ("Attempt to split fixed-size window");
3775 check_min_window_sizes ();
3779 if (size_int
< window_min_height
)
3780 error ("Window height %d too small (after splitting)", size_int
);
3781 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
3782 error ("Window height %d too small (after splitting)",
3783 XFASTINT (o
->total_lines
) - size_int
);
3784 if (NILP (o
->parent
)
3785 || NILP (XWINDOW (o
->parent
)->vchild
))
3787 make_dummy_parent (window
);
3789 XWINDOW (new)->vchild
= window
;
3794 if (size_int
< window_min_width
)
3795 error ("Window width %d too small (after splitting)", size_int
);
3797 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
3798 error ("Window width %d too small (after splitting)",
3799 XFASTINT (o
->total_cols
) - size_int
);
3800 if (NILP (o
->parent
)
3801 || NILP (XWINDOW (o
->parent
)->hchild
))
3803 make_dummy_parent (window
);
3805 XWINDOW (new)->hchild
= window
;
3809 /* Now we know that window's parent is a vertical combination
3810 if we are dividing vertically, or a horizontal combination
3811 if we are making side-by-side windows */
3813 windows_or_buffers_changed
++;
3814 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3815 new = make_window ();
3818 p
->frame
= o
->frame
;
3820 if (!NILP (p
->next
))
3821 XWINDOW (p
->next
)->prev
= new;
3824 p
->parent
= o
->parent
;
3826 p
->window_end_valid
= Qnil
;
3827 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3829 /* Duplicate special geometry settings. */
3831 p
->left_margin_cols
= o
->left_margin_cols
;
3832 p
->right_margin_cols
= o
->right_margin_cols
;
3833 p
->left_fringe_width
= o
->left_fringe_width
;
3834 p
->right_fringe_width
= o
->right_fringe_width
;
3835 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
3836 p
->scroll_bar_width
= o
->scroll_bar_width
;
3837 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
3839 /* Apportion the available frame space among the two new windows */
3841 if (!NILP (horflag
))
3843 p
->total_lines
= o
->total_lines
;
3844 p
->top_line
= o
->top_line
;
3845 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
3846 XSETFASTINT (o
->total_cols
, size_int
);
3847 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
3848 adjust_window_margins (p
);
3849 adjust_window_margins (o
);
3853 p
->left_col
= o
->left_col
;
3854 p
->total_cols
= o
->total_cols
;
3855 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
3856 XSETFASTINT (o
->total_lines
, size_int
);
3857 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
3860 /* Adjust glyph matrices. */
3863 Fset_window_buffer (new, o
->buffer
, Qt
);
3867 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 3, "p",
3868 doc
: /* Make current window ARG lines bigger.
3869 From program, optional second arg non-nil means grow sideways ARG columns.
3870 Interactively, if an argument is not given, make the window one line bigger.
3872 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3873 of the siblings above or to the left of the selected window. Only
3874 siblings to the right or below are changed. */)
3875 (arg
, side
, preserve_before
)
3876 register Lisp_Object arg
, side
, preserve_before
;
3879 enlarge_window (selected_window
, XINT (arg
), !NILP (side
),
3880 !NILP (preserve_before
));
3882 if (! NILP (Vwindow_configuration_change_hook
))
3883 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3888 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 3, "p",
3889 doc
: /* Make current window ARG lines smaller.
3890 From program, optional second arg non-nil means shrink sideways arg columns.
3891 Interactively, if an argument is not given, make the window one line smaller.
3893 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3894 of the siblings above or to the left of the selected window. Only
3895 siblings to the right or below are changed. */)
3896 (arg
, side
, preserve_before
)
3897 register Lisp_Object arg
, side
, preserve_before
;
3900 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
),
3901 !NILP (preserve_before
));
3903 if (! NILP (Vwindow_configuration_change_hook
))
3904 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3910 window_height (window
)
3913 register struct window
*p
= XWINDOW (window
);
3914 return WINDOW_TOTAL_LINES (p
);
3918 window_width (window
)
3921 register struct window
*p
= XWINDOW (window
);
3922 return WINDOW_TOTAL_COLS (p
);
3927 *(widthflag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
3929 #define CURSIZE(w) \
3930 *(widthflag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
3933 /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means
3934 increase its width. Siblings of the selected window are resized to
3935 fulfill the size request. If they become too small in the process,
3936 they will be deleted.
3938 If PRESERVE_BEFORE is nonzero, that means don't alter
3939 the siblings to the left or above WINDOW. */
3942 enlarge_window (window
, delta
, widthflag
, preserve_before
)
3944 int delta
, widthflag
, preserve_before
;
3946 Lisp_Object parent
, next
, prev
;
3950 int (*sizefun
) P_ ((Lisp_Object
))
3951 = widthflag
? window_width
: window_height
;
3952 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3953 = (widthflag
? set_window_width
: set_window_height
);
3955 /* Check values of window_min_width and window_min_height for
3957 check_min_window_sizes ();
3959 /* Give up if this window cannot be resized. */
3960 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3961 error ("Window is not resizable");
3963 /* Find the parent of the selected window. */
3966 p
= XWINDOW (window
);
3972 error ("No other window to side of this one");
3977 ? !NILP (XWINDOW (parent
)->hchild
)
3978 : !NILP (XWINDOW (parent
)->vchild
))
3984 sizep
= &CURSIZE (window
);
3987 register int maxdelta
;
3989 /* Compute the maximum size increment this window can have. */
3991 if (preserve_before
)
3995 maxdelta
= (*sizefun
) (parent
) - XINT (*sizep
);
3996 /* Subtract size of siblings before, since we can't take that. */
3997 maxdelta
-= XINT (CURBEG (window
)) - XINT (CURBEG (parent
));
4000 maxdelta
= (!NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4001 - window_min_size (XWINDOW (p
->next
),
4006 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4007 /* This is a main window followed by a minibuffer. */
4008 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4009 - window_min_size (XWINDOW (p
->next
),
4011 /* This is a minibuffer following a main window. */
4012 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4013 - window_min_size (XWINDOW (p
->prev
),
4015 /* This is a frame with only one window, a minibuffer-only
4016 or a minibufferless frame. */
4019 if (delta
> maxdelta
)
4020 /* This case traps trying to make the minibuffer
4021 the full frame, or make the only window aside from the
4022 minibuffer the full frame. */
4026 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
4028 delete_window (window
);
4035 /* Find the total we can get from other siblings without deleting them. */
4037 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4038 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4040 if (! preserve_before
)
4041 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4042 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4045 /* If we can get it all from them without deleting them, do so. */
4046 if (delta
<= maximum
)
4048 Lisp_Object first_unaffected
;
4049 Lisp_Object first_affected
;
4054 first_affected
= window
;
4055 /* Look at one sibling at a time,
4056 moving away from this window in both directions alternately,
4057 and take as much as we can get without deleting that sibling. */
4059 && (!NILP (next
) || (!preserve_before
&& !NILP (prev
))))
4063 int this_one
= ((*sizefun
) (next
)
4064 - window_min_size (XWINDOW (next
),
4065 widthflag
, 0, &fixed_p
));
4068 if (this_one
> delta
)
4071 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4072 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4077 next
= XWINDOW (next
)->next
;
4083 if (!preserve_before
&& ! NILP (prev
))
4085 int this_one
= ((*sizefun
) (prev
)
4086 - window_min_size (XWINDOW (prev
),
4087 widthflag
, 0, &fixed_p
));
4090 if (this_one
> delta
)
4093 first_affected
= prev
;
4095 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4096 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4101 prev
= XWINDOW (prev
)->prev
;
4105 xassert (delta
== 0);
4107 /* Now recalculate the edge positions of all the windows affected,
4108 based on the new sizes. */
4109 first_unaffected
= next
;
4110 prev
= first_affected
;
4111 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4112 prev
= next
, next
= XWINDOW (next
)->next
)
4114 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4115 /* This does not change size of NEXT,
4116 but it propagates the new top edge to its children */
4117 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4122 register int delta1
;
4123 register int opht
= (*sizefun
) (parent
);
4125 if (opht
<= XINT (*sizep
) + delta
)
4127 /* If trying to grow this window to or beyond size of the parent,
4128 just delete all the sibling windows. */
4129 Lisp_Object start
, tem
, next
;
4131 start
= XWINDOW (parent
)->vchild
;
4133 start
= XWINDOW (parent
)->hchild
;
4135 /* Delete any siblings that come after WINDOW. */
4136 tem
= XWINDOW (window
)->next
;
4137 while (! NILP (tem
))
4139 next
= XWINDOW (tem
)->next
;
4140 delete_window (tem
);
4144 /* Delete any siblings that come after WINDOW.
4145 Note that if START is not WINDOW, then WINDOW still
4146 Fhas siblings, so WINDOW has not yet replaced its parent. */
4148 while (! EQ (tem
, window
))
4150 next
= XWINDOW (tem
)->next
;
4151 delete_window (tem
);
4157 /* Otherwise, make delta1 just right so that if we add
4158 delta1 lines to this window and to the parent, and then
4159 shrink the parent back to its original size, the new
4160 proportional size of this window will increase by delta.
4162 The function size_window will compute the new height h'
4163 of the window from delta1 as:
4166 x = delta1 - delta1/n * n for the 1st resizable child
4169 where n is the number of children that can be resized.
4170 We can ignore x by choosing a delta1 that is a multiple of
4171 n. We want the height of this window to come out as
4181 The number of children n equals the number of resizable
4182 children of this window + 1 because we know window itself
4183 is resizable (otherwise we would have signalled an error). */
4185 struct window
*w
= XWINDOW (window
);
4189 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4190 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4192 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4193 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4198 /* Add delta1 lines or columns to this window, and to the parent,
4199 keeping things consistent while not affecting siblings. */
4200 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4201 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4203 /* Squeeze out delta1 lines or columns from our parent,
4204 shriking this window and siblings proportionately.
4205 This brings parent back to correct size.
4206 Delta1 was calculated so this makes this window the desired size,
4207 taking it all out of the siblings. */
4208 (*setsizefun
) (parent
, opht
, 0);
4213 XSETFASTINT (p
->last_modified
, 0);
4214 XSETFASTINT (p
->last_overlay_modified
, 0);
4216 /* Adjust glyph matrices. */
4217 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4225 /***********************************************************************
4226 Resizing Mini-Windows
4227 ***********************************************************************/
4229 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4231 enum save_restore_action
4238 static int save_restore_orig_size
P_ ((struct window
*,
4239 enum save_restore_action
));
4241 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4242 from lowest windows first. */
4245 shrink_window_lowest_first (w
, height
)
4253 xassert (!MINI_WINDOW_P (w
));
4255 /* Set redisplay hints. */
4256 XSETFASTINT (w
->last_modified
, 0);
4257 XSETFASTINT (w
->last_overlay_modified
, 0);
4258 windows_or_buffers_changed
++;
4259 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4261 old_height
= XFASTINT (w
->total_lines
);
4262 XSETFASTINT (w
->total_lines
, height
);
4264 if (!NILP (w
->hchild
))
4266 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4268 c
= XWINDOW (child
);
4269 c
->top_line
= w
->top_line
;
4270 shrink_window_lowest_first (c
, height
);
4273 else if (!NILP (w
->vchild
))
4275 Lisp_Object last_child
;
4276 int delta
= old_height
- height
;
4281 /* Find the last child. We are taking space from lowest windows
4282 first, so we iterate over children from the last child
4284 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4287 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4288 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4292 c
= XWINDOW (child
);
4293 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4295 if (this_one
> delta
)
4298 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4302 /* Compute new positions. */
4303 last_top
= XINT (w
->top_line
);
4304 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4306 c
= XWINDOW (child
);
4307 c
->top_line
= make_number (last_top
);
4308 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4309 last_top
+= XFASTINT (c
->total_lines
);
4315 /* Save, restore, or check positions and sizes in the window tree
4316 rooted at W. ACTION says what to do.
4318 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4319 orig_total_lines members are valid for all windows in the window
4320 tree. Value is non-zero if they are valid.
4322 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4323 orig_top_line and orig_total_lines for all windows in the tree.
4325 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4326 stored in orig_top_line and orig_total_lines for all windows. */
4329 save_restore_orig_size (w
, action
)
4331 enum save_restore_action action
;
4337 if (!NILP (w
->hchild
))
4339 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4342 else if (!NILP (w
->vchild
))
4344 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4350 case CHECK_ORIG_SIZES
:
4351 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4355 case SAVE_ORIG_SIZES
:
4356 w
->orig_top_line
= w
->top_line
;
4357 w
->orig_total_lines
= w
->total_lines
;
4358 XSETFASTINT (w
->last_modified
, 0);
4359 XSETFASTINT (w
->last_overlay_modified
, 0);
4362 case RESTORE_ORIG_SIZES
:
4363 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4364 w
->top_line
= w
->orig_top_line
;
4365 w
->total_lines
= w
->orig_total_lines
;
4366 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4367 XSETFASTINT (w
->last_modified
, 0);
4368 XSETFASTINT (w
->last_overlay_modified
, 0);
4375 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4382 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4383 without deleting other windows. */
4386 grow_mini_window (w
, delta
)
4390 struct frame
*f
= XFRAME (w
->frame
);
4391 struct window
*root
;
4393 xassert (MINI_WINDOW_P (w
));
4394 xassert (delta
>= 0);
4396 /* Check values of window_min_width and window_min_height for
4398 check_min_window_sizes ();
4400 /* Compute how much we can enlarge the mini-window without deleting
4402 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4405 int min_height
= window_min_size (root
, 0, 0, 0);
4406 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4407 /* Note that the root window may already be smaller than
4409 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4414 /* Save original window sizes and positions, if not already done. */
4415 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4416 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4418 /* Shrink other windows. */
4419 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4421 /* Grow the mini-window. */
4422 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4423 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4424 XSETFASTINT (w
->last_modified
, 0);
4425 XSETFASTINT (w
->last_overlay_modified
, 0);
4432 /* Shrink mini-window W. If there is recorded info about window sizes
4433 before a call to grow_mini_window, restore recorded window sizes.
4434 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4438 shrink_mini_window (w
)
4441 struct frame
*f
= XFRAME (w
->frame
);
4442 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4444 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4446 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4448 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4449 windows_or_buffers_changed
= 1;
4451 else if (XFASTINT (w
->total_lines
) > 1)
4453 /* Distribute the additional lines of the mini-window
4454 among the other windows. */
4456 XSETWINDOW (window
, w
);
4457 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0, 0);
4463 /* Mark window cursors off for all windows in the window tree rooted
4464 at W by setting their phys_cursor_on_p flag to zero. Called from
4465 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4466 the frame are cleared. */
4469 mark_window_cursors_off (w
)
4474 if (!NILP (w
->hchild
))
4475 mark_window_cursors_off (XWINDOW (w
->hchild
));
4476 else if (!NILP (w
->vchild
))
4477 mark_window_cursors_off (XWINDOW (w
->vchild
));
4479 w
->phys_cursor_on_p
= 0;
4481 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4486 /* Return number of lines of text (not counting mode lines) in W. */
4489 window_internal_height (w
)
4492 int ht
= XFASTINT (w
->total_lines
);
4494 if (!MINI_WINDOW_P (w
))
4496 if (!NILP (w
->parent
)
4497 || !NILP (w
->vchild
)
4498 || !NILP (w
->hchild
)
4501 || WINDOW_WANTS_MODELINE_P (w
))
4504 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4512 /* Return the number of columns in W.
4513 Don't count columns occupied by scroll bars or the vertical bar
4514 separating W from the sibling to its right. */
4517 window_box_text_cols (w
)
4520 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4521 int width
= XINT (w
->total_cols
);
4523 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4524 /* Scroll bars occupy a few columns. */
4525 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4526 else if (!FRAME_WINDOW_P (f
)
4527 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4528 /* The column of `|' characters separating side-by-side windows
4529 occupies one column only. */
4532 if (FRAME_WINDOW_P (f
))
4533 /* On window-systems, fringes and display margins cannot be
4534 used for normal text. */
4535 width
-= (WINDOW_FRINGE_COLS (w
)
4536 + WINDOW_LEFT_MARGIN_COLS (w
)
4537 + WINDOW_RIGHT_MARGIN_COLS (w
));
4543 /************************************************************************
4545 ***********************************************************************/
4547 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4548 N screen-fulls, which is defined as the height of the window minus
4549 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4550 instead. Negative values of N mean scroll down. NOERROR non-zero
4551 means don't signal an error if we try to move over BEGV or ZV,
4555 window_scroll (window
, n
, whole
, noerror
)
4563 /* If we must, use the pixel-based version which is much slower than
4564 the line-based one but can handle varying line heights. */
4565 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4566 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4568 window_scroll_line_based (window
, n
, whole
, noerror
);
4574 /* Implementation of window_scroll that works based on pixel line
4575 heights. See the comment of window_scroll for parameter
4579 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4586 struct window
*w
= XWINDOW (window
);
4587 struct text_pos start
;
4589 int this_scroll_margin
;
4591 /* True if we fiddled the window vscroll field without really scrolling. */
4594 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4596 /* If PT is not visible in WINDOW, move back one half of
4597 the screen. Allow PT to be partially visible, otherwise
4598 something like (scroll-down 1) with PT in the line before
4599 the partially visible one would recenter. */
4600 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
4603 /* Move backward half the height of the window. Performance note:
4604 vmotion used here is about 10% faster, but would give wrong
4605 results for variable height lines. */
4606 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4607 it
.current_y
= it
.last_visible_y
;
4608 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4610 /* The function move_iterator_vertically may move over more than
4611 the specified y-distance. If it->w is small, e.g. a
4612 mini-buffer window, we may end up in front of the window's
4613 display area. This is the case when Start displaying at the
4614 start of the line containing PT in this case. */
4615 if (it
.current_y
<= 0)
4617 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4618 move_it_vertically_backward (&it
, 0);
4622 start
= it
.current
.pos
;
4624 else if (auto_window_vscroll_p
)
4626 if (tem
= XCAR (XCDR (XCDR (tem
))), CONSP (tem
))
4629 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4631 dy
= max ((window_box_height (w
)
4632 - next_screen_context_lines
* dy
),
4636 if (n
< 0 && (px
= XINT (XCAR (tem
))) > 0)
4638 px
= max (0, -w
->vscroll
- min (px
, -dy
));
4639 Fset_window_vscroll (window
, make_number (px
), Qt
);
4642 if (n
> 0 && (px
= XINT (XCDR (tem
))) > 0)
4644 px
= max (0, -w
->vscroll
+ min (px
, dy
));
4645 Fset_window_vscroll (window
, make_number (px
), Qt
);
4649 Fset_window_vscroll (window
, make_number (0), Qt
);
4652 /* If scroll_preserve_screen_position is non-nil, we try to set
4653 point in the same window line as it is now, so get that line. */
4654 if (!NILP (Vscroll_preserve_screen_position
))
4656 start_display (&it
, w
, start
);
4657 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4658 preserve_y
= it
.current_y
;
4663 /* Move iterator it from start the specified distance forward or
4664 backward. The result is the new window start. */
4665 start_display (&it
, w
, start
);
4668 int start_pos
= IT_CHARPOS (it
);
4669 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4670 dy
= max ((window_box_height (w
)
4671 - next_screen_context_lines
* dy
),
4674 /* Note that move_it_vertically always moves the iterator to the
4675 start of a line. So, if the last line doesn't have a newline,
4676 we would end up at the start of the line ending at ZV. */
4679 move_it_vertically_backward (&it
, -dy
);
4680 /* Ensure we actually does move, e.g. in case we are currently
4681 looking at an image that is taller that the window height. */
4682 while (start_pos
== IT_CHARPOS (it
)
4683 && start_pos
> BEGV
)
4684 move_it_by_lines (&it
, -1, 1);
4688 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4689 MOVE_TO_POS
| MOVE_TO_Y
);
4690 /* Ensure we actually does move, e.g. in case we are currently
4691 looking at an image that is taller that the window height. */
4692 while (start_pos
== IT_CHARPOS (it
)
4694 move_it_by_lines (&it
, 1, 1);
4698 move_it_by_lines (&it
, n
, 1);
4700 /* We failed if we find ZV is already on the screen (scrolling up,
4701 means there's nothing past the end), or if we can't start any
4702 earlier (scrolling down, means there's nothing past the top). */
4703 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4704 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4706 if (IT_CHARPOS (it
) == ZV
)
4708 if (it
.current_y
< it
.last_visible_y
4709 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4710 >= it
.last_visible_y
))
4712 /* The last line was only partially visible, make it fully
4714 w
->vscroll
= (it
.last_visible_y
4715 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4716 adjust_glyphs (it
.f
);
4721 Fsignal (Qend_of_buffer
, Qnil
);
4725 if (w
->vscroll
!= 0)
4726 /* The first line was only partially visible, make it fully
4732 Fsignal (Qbeginning_of_buffer
, Qnil
);
4735 /* If control gets here, then we vscrolled. */
4737 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4739 /* Don't try to change the window start below. */
4745 int pos
= IT_CHARPOS (it
);
4748 /* If in the middle of a multi-glyph character move forward to
4749 the next character. */
4750 if (in_display_vector_p (&it
))
4753 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4756 /* Set the window start, and set up the window for redisplay. */
4757 set_marker_restricted (w
->start
, make_number (pos
),
4759 bytepos
= XMARKER (w
->start
)->bytepos
;
4760 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
4762 w
->update_mode_line
= Qt
;
4763 XSETFASTINT (w
->last_modified
, 0);
4764 XSETFASTINT (w
->last_overlay_modified
, 0);
4765 /* Set force_start so that redisplay_window will run the
4766 window-scroll-functions. */
4767 w
->force_start
= Qt
;
4770 /* The rest of this function uses current_y in a nonstandard way,
4771 not including the height of the header line if any. */
4772 it
.current_y
= it
.vpos
= 0;
4774 /* Move PT out of scroll margins.
4775 This code wants current_y to be zero at the window start position
4776 even if there is a header line. */
4777 this_scroll_margin
= max (0, scroll_margin
);
4778 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4779 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4783 /* We moved the window start towards ZV, so PT may be now
4784 in the scroll margin at the top. */
4785 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4786 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
4787 && (NILP (Vscroll_preserve_screen_position
)
4788 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4789 /* We found PT at a legitimate height. Leave it alone. */
4791 else if (preserve_y
>= 0)
4793 /* If we have a header line, take account of it.
4794 This is necessary because we set it.current_y to 0, above. */
4795 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4796 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4798 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4799 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4803 while (it
.current_y
< this_scroll_margin
)
4805 int prev
= it
.current_y
;
4806 move_it_by_lines (&it
, 1, 1);
4807 if (prev
== it
.current_y
)
4810 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4815 int charpos
, bytepos
;
4818 /* Save our position, for the preserve_y case. */
4819 charpos
= IT_CHARPOS (it
);
4820 bytepos
= IT_BYTEPOS (it
);
4822 /* We moved the window start towards BEGV, so PT may be now
4823 in the scroll margin at the bottom. */
4824 move_it_to (&it
, PT
, -1,
4825 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
4826 - this_scroll_margin
- 1),
4828 MOVE_TO_POS
| MOVE_TO_Y
);
4830 /* Save our position, in case it's correct. */
4831 charpos
= IT_CHARPOS (it
);
4832 bytepos
= IT_BYTEPOS (it
);
4834 /* See if point is on a partially visible line at the end. */
4835 if (it
.what
== IT_EOB
)
4836 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
4839 move_it_by_lines (&it
, 1, 1);
4840 partial_p
= it
.current_y
> it
.last_visible_y
;
4843 if (charpos
== PT
&& !partial_p
4844 && (NILP (Vscroll_preserve_screen_position
)
4845 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4846 /* We found PT before we found the display margin, so PT is ok. */
4848 else if (preserve_y
>= 0)
4850 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4851 start_display (&it
, w
, start
);
4852 #if 0 /* It's wrong to subtract this here
4853 because we called start_display again
4854 and did not alter it.current_y this time. */
4856 /* If we have a header line, take account of it. */
4857 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4858 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4861 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4862 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4867 /* The last line was only partially visible, so back up two
4868 lines to make sure we're on a fully visible line. */
4870 move_it_by_lines (&it
, -2, 0);
4871 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4874 /* No, the position we saved is OK, so use it. */
4875 SET_PT_BOTH (charpos
, bytepos
);
4881 /* Implementation of window_scroll that works based on screen lines.
4882 See the comment of window_scroll for parameter descriptions. */
4885 window_scroll_line_based (window
, n
, whole
, noerror
)
4891 register struct window
*w
= XWINDOW (window
);
4892 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4893 register int pos
, pos_byte
;
4894 register int ht
= window_internal_height (w
);
4895 register Lisp_Object tem
;
4899 struct position posit
;
4902 /* If scrolling screen-fulls, compute the number of lines to
4903 scroll from the window's height. */
4905 n
*= max (1, ht
- next_screen_context_lines
);
4907 startpos
= marker_position (w
->start
);
4909 posit
= *compute_motion (startpos
, 0, 0, 0,
4911 -1, XINT (w
->hscroll
),
4913 original_vpos
= posit
.vpos
;
4915 XSETFASTINT (tem
, PT
);
4916 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4920 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4925 lose
= n
< 0 && PT
== BEGV
;
4926 Fvertical_motion (make_number (n
), window
);
4930 SET_PT_BOTH (opoint
, opoint_byte
);
4937 Fsignal (Qbeginning_of_buffer
, Qnil
);
4942 int this_scroll_margin
= scroll_margin
;
4944 /* Don't use a scroll margin that is negative or too large. */
4945 if (this_scroll_margin
< 0)
4946 this_scroll_margin
= 0;
4948 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
4949 this_scroll_margin
= XINT (w
->total_lines
) / 4;
4951 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4952 w
->start_at_line_beg
= bolp
;
4953 w
->update_mode_line
= Qt
;
4954 XSETFASTINT (w
->last_modified
, 0);
4955 XSETFASTINT (w
->last_overlay_modified
, 0);
4956 /* Set force_start so that redisplay_window will run
4957 the window-scroll-functions. */
4958 w
->force_start
= Qt
;
4960 if (!NILP (Vscroll_preserve_screen_position
)
4961 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
4963 SET_PT_BOTH (pos
, pos_byte
);
4964 Fvertical_motion (make_number (original_vpos
), window
);
4966 /* If we scrolled forward, put point enough lines down
4967 that it is outside the scroll margin. */
4972 if (this_scroll_margin
> 0)
4974 SET_PT_BOTH (pos
, pos_byte
);
4975 Fvertical_motion (make_number (this_scroll_margin
), window
);
4981 if (top_margin
<= opoint
)
4982 SET_PT_BOTH (opoint
, opoint_byte
);
4983 else if (!NILP (Vscroll_preserve_screen_position
))
4985 SET_PT_BOTH (pos
, pos_byte
);
4986 Fvertical_motion (make_number (original_vpos
), window
);
4989 SET_PT (top_margin
);
4995 /* If we scrolled backward, put point near the end of the window
4996 but not within the scroll margin. */
4997 SET_PT_BOTH (pos
, pos_byte
);
4998 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4999 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5002 bottom_margin
= PT
+ 1;
5004 if (bottom_margin
> opoint
)
5005 SET_PT_BOTH (opoint
, opoint_byte
);
5008 if (!NILP (Vscroll_preserve_screen_position
))
5010 SET_PT_BOTH (pos
, pos_byte
);
5011 Fvertical_motion (make_number (original_vpos
), window
);
5014 Fvertical_motion (make_number (-1), window
);
5023 Fsignal (Qend_of_buffer
, Qnil
);
5028 /* Scroll selected_window up or down. If N is nil, scroll a
5029 screen-full which is defined as the height of the window minus
5030 next_screen_context_lines. If N is the symbol `-', scroll.
5031 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5032 up. This is the guts of Fscroll_up and Fscroll_down. */
5035 scroll_command (n
, direction
)
5039 int count
= SPECPDL_INDEX ();
5041 xassert (abs (direction
) == 1);
5043 /* If selected window's buffer isn't current, make it current for
5044 the moment. But don't screw up if window_scroll gets an error. */
5045 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5047 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5048 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5050 /* Make redisplay consider other windows than just selected_window. */
5051 ++windows_or_buffers_changed
;
5055 window_scroll (selected_window
, direction
, 1, 0);
5056 else if (EQ (n
, Qminus
))
5057 window_scroll (selected_window
, -direction
, 1, 0);
5060 n
= Fprefix_numeric_value (n
);
5061 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5064 unbind_to (count
, Qnil
);
5067 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5068 doc
: /* Scroll text of current window upward ARG lines.
5069 If ARG is omitted or nil, scroll upward by a near full screen.
5070 A near full screen is `next-screen-context-lines' less than a full screen.
5071 Negative ARG means scroll downward.
5072 If ARG is the atom `-', scroll downward by nearly full screen.
5073 When calling from a program, supply as argument a number, nil, or `-'. */)
5077 scroll_command (arg
, 1);
5081 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5082 doc
: /* Scroll text of current window down ARG lines.
5083 If ARG is omitted or nil, scroll down by a near full screen.
5084 A near full screen is `next-screen-context-lines' less than a full screen.
5085 Negative ARG means scroll upward.
5086 If ARG is the atom `-', scroll upward by nearly full screen.
5087 When calling from a program, supply as argument a number, nil, or `-'. */)
5091 scroll_command (arg
, -1);
5095 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5096 doc
: /* Return the other window for \"other window scroll\" commands.
5097 If `other-window-scroll-buffer' is non-nil, a window
5098 showing that buffer is used.
5099 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5100 specifies the window. This takes precedence over
5101 `other-window-scroll-buffer'. */)
5106 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5107 && !NILP (Vminibuf_scroll_window
))
5108 window
= Vminibuf_scroll_window
;
5109 /* If buffer is specified, scroll that buffer. */
5110 else if (!NILP (Vother_window_scroll_buffer
))
5112 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5114 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5118 /* Nothing specified; look for a neighboring window on the same
5120 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5122 if (EQ (window
, selected_window
))
5123 /* That didn't get us anywhere; look for a window on another
5126 window
= Fnext_window (window
, Qnil
, Qt
);
5127 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5128 && ! EQ (window
, selected_window
));
5131 CHECK_LIVE_WINDOW (window
);
5133 if (EQ (window
, selected_window
))
5134 error ("There is no other window");
5139 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5140 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5141 A near full screen is `next-screen-context-lines' less than a full screen.
5142 The next window is the one below the current one; or the one at the top
5143 if the current one is at the bottom. Negative ARG means scroll downward.
5144 If ARG is the atom `-', scroll downward by nearly full screen.
5145 When calling from a program, supply as argument a number, nil, or `-'.
5147 If `other-window-scroll-buffer' is non-nil, scroll the window
5148 showing that buffer, popping the buffer up if necessary.
5149 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5150 specifies the window to scroll. This takes precedence over
5151 `other-window-scroll-buffer'. */)
5157 int count
= SPECPDL_INDEX ();
5159 window
= Fother_window_for_scrolling ();
5160 w
= XWINDOW (window
);
5162 /* Don't screw up if window_scroll gets an error. */
5163 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5164 ++windows_or_buffers_changed
;
5166 Fset_buffer (w
->buffer
);
5167 SET_PT (marker_position (w
->pointm
));
5170 window_scroll (window
, 1, 1, 1);
5171 else if (EQ (arg
, Qminus
))
5172 window_scroll (window
, -1, 1, 1);
5178 window_scroll (window
, XINT (arg
), 0, 1);
5181 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5182 unbind_to (count
, Qnil
);
5187 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5188 doc
: /* Scroll selected window display ARG columns left.
5189 Default for ARG is window width minus 2.
5190 Value is the total amount of leftward horizontal scrolling in
5191 effect after the change.
5192 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5193 lower bound for automatic scrolling, i.e. automatic scrolling
5194 will not scroll a window to a column less than the value returned
5195 by this function. This happens in an interactive call. */)
5197 register Lisp_Object arg
, set_minimum
;
5201 struct window
*w
= XWINDOW (selected_window
);
5204 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5206 arg
= Fprefix_numeric_value (arg
);
5208 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5209 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5211 if (!NILP (set_minimum
))
5212 w
->min_hscroll
= w
->hscroll
;
5217 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5218 doc
: /* Scroll selected window display ARG columns right.
5219 Default for ARG is window width minus 2.
5220 Value is the total amount of leftward horizontal scrolling in
5221 effect after the change.
5222 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5223 lower bound for automatic scrolling, i.e. automatic scrolling
5224 will not scroll a window to a column less than the value returned
5225 by this function. This happens in an interactive call. */)
5227 register Lisp_Object arg
, set_minimum
;
5231 struct window
*w
= XWINDOW (selected_window
);
5234 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5236 arg
= Fprefix_numeric_value (arg
);
5238 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5239 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5241 if (!NILP (set_minimum
))
5242 w
->min_hscroll
= w
->hscroll
;
5247 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5248 doc
: /* Return the window which was selected when entering the minibuffer.
5249 Returns nil, if current window is not a minibuffer window. */)
5252 if (minibuf_level
> 0
5253 && MINI_WINDOW_P (XWINDOW (selected_window
))
5254 && WINDOW_LIVE_P (minibuf_selected_window
))
5255 return minibuf_selected_window
;
5260 /* Value is the number of lines actually displayed in window W,
5261 as opposed to its height. */
5264 displayed_window_lines (w
)
5268 struct text_pos start
;
5269 int height
= window_box_height (w
);
5270 struct buffer
*old_buffer
;
5273 if (XBUFFER (w
->buffer
) != current_buffer
)
5275 old_buffer
= current_buffer
;
5276 set_buffer_internal (XBUFFER (w
->buffer
));
5281 /* In case W->start is out of the accessible range, do something
5282 reasonable. This happens in Info mode when Info-scroll-down
5283 calls (recenter -1) while W->start is 1. */
5284 if (XMARKER (w
->start
)->charpos
< BEGV
)
5285 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5286 else if (XMARKER (w
->start
)->charpos
> ZV
)
5287 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5289 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5291 start_display (&it
, w
, start
);
5292 move_it_vertically (&it
, height
);
5293 bottom_y
= line_bottom_y (&it
);
5295 /* rms: On a non-window display,
5296 the value of it.vpos at the bottom of the screen
5297 seems to be 1 larger than window_box_height (w).
5298 This kludge fixes a bug whereby (move-to-window-line -1)
5299 when ZV is on the last screen line
5300 moves to the previous screen line instead of the last one. */
5301 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5304 /* Add in empty lines at the bottom of the window. */
5305 if (bottom_y
< height
)
5307 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5308 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5312 set_buffer_internal (old_buffer
);
5318 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5319 doc
: /* Center point in window and redisplay frame.
5320 With prefix argument ARG, recenter putting point on screen line ARG
5321 relative to the current window. If ARG is negative, it counts up from the
5322 bottom of the window. (ARG should be less than the height of the window.)
5324 If ARG is omitted or nil, erase the entire frame and then
5325 redraw with point in the center of the current window.
5326 Just C-u as prefix means put point in the center of the window
5327 and redisplay normally--don't erase and redraw the frame. */)
5329 register Lisp_Object arg
;
5331 struct window
*w
= XWINDOW (selected_window
);
5332 struct buffer
*buf
= XBUFFER (w
->buffer
);
5333 struct buffer
*obuf
= current_buffer
;
5335 int charpos
, bytepos
;
5337 int this_scroll_margin
;
5339 /* If redisplay is suppressed due to an error, try again. */
5340 obuf
->display_error_modiff
= 0;
5346 /* Invalidate pixel data calculated for all compositions. */
5347 for (i
= 0; i
< n_compositions
; i
++)
5348 composition_table
[i
]->font
= NULL
;
5350 Fredraw_frame (w
->frame
);
5351 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
5354 else if (CONSP (arg
)) /* Just C-u. */
5358 arg
= Fprefix_numeric_value (arg
);
5363 set_buffer_internal (buf
);
5365 /* Do this after making BUF current
5366 in case scroll_margin is buffer-local. */
5367 this_scroll_margin
= max (0, scroll_margin
);
5368 this_scroll_margin
= min (this_scroll_margin
,
5369 XFASTINT (w
->total_lines
) / 4);
5371 /* Handle centering on a graphical frame specially. Such frames can
5372 have variable-height lines and centering point on the basis of
5373 line counts would lead to strange effects. */
5374 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5381 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5382 start_display (&it
, w
, pt
);
5383 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5384 charpos
= IT_CHARPOS (it
);
5385 bytepos
= IT_BYTEPOS (it
);
5392 int extra_line_spacing
;
5393 int h
= window_box_height (w
);
5395 iarg
= - max (-iarg
, this_scroll_margin
);
5397 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5398 start_display (&it
, w
, pt
);
5400 /* Be sure we have the exact height of the full line containing PT. */
5401 move_it_by_lines (&it
, 0, 1);
5403 /* The amount of pixels we have to move back is the window
5404 height minus what's displayed in the line containing PT,
5405 and the lines below. */
5408 move_it_by_lines (&it
, nlines
, 1);
5410 if (it
.vpos
== nlines
)
5414 /* Last line has no newline */
5415 h
-= line_bottom_y (&it
);
5419 /* Don't reserve space for extra line spacing of last line. */
5420 extra_line_spacing
= it
.max_extra_line_spacing
;
5422 /* If we can't move down NLINES lines because we hit
5423 the end of the buffer, count in some empty lines. */
5424 if (it
.vpos
< nlines
)
5427 extra_line_spacing
= it
.extra_line_spacing
;
5428 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5433 /* Now find the new top line (starting position) of the window. */
5434 start_display (&it
, w
, pt
);
5436 move_it_vertically_backward (&it
, h
);
5438 /* If extra line spacing is present, we may move too far
5439 back. This causes the last line to be only partially
5440 visible (which triggers redisplay to recenter that line
5441 in the middle), so move forward.
5442 But ignore extra line spacing on last line, as it is not
5443 considered to be part of the visible height of the line.
5445 h
+= extra_line_spacing
;
5446 while (-it
.current_y
> h
)
5447 move_it_by_lines (&it
, 1, 1);
5449 charpos
= IT_CHARPOS (it
);
5450 bytepos
= IT_BYTEPOS (it
);
5454 struct position pos
;
5456 iarg
= max (iarg
, this_scroll_margin
);
5458 pos
= *vmotion (PT
, -iarg
, w
);
5459 charpos
= pos
.bufpos
;
5460 bytepos
= pos
.bytepos
;
5465 struct position pos
;
5466 int ht
= window_internal_height (w
);
5473 /* Don't let it get into the margin at either top or bottom. */
5474 iarg
= max (iarg
, this_scroll_margin
);
5475 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5477 pos
= *vmotion (PT
, - iarg
, w
);
5478 charpos
= pos
.bufpos
;
5479 bytepos
= pos
.bytepos
;
5482 /* Set the new window start. */
5483 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5484 w
->window_end_valid
= Qnil
;
5486 w
->optional_new_start
= Qt
;
5488 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5489 w
->start_at_line_beg
= Qt
;
5491 w
->start_at_line_beg
= Qnil
;
5493 set_buffer_internal (obuf
);
5498 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5500 doc
: /* Return the height in lines of the text display area of WINDOW.
5501 This doesn't include the mode-line (or header-line if any) or any
5502 partial-height lines in the text display area. */)
5506 struct window
*w
= decode_window (window
);
5507 int pixel_height
= window_box_height (w
);
5508 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5509 return make_number (line_height
);
5514 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5516 doc
: /* Position point relative to window.
5517 With no argument, position point at center of window.
5518 An argument specifies vertical position within the window;
5519 zero means top of window, negative means relative to bottom of window. */)
5523 struct window
*w
= XWINDOW (selected_window
);
5527 int this_scroll_margin
;
5530 window
= selected_window
;
5531 start
= marker_position (w
->start
);
5532 if (start
< BEGV
|| start
> ZV
)
5534 int height
= window_internal_height (w
);
5535 Fvertical_motion (make_number (- (height
/ 2)), window
);
5536 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5537 w
->start_at_line_beg
= Fbolp ();
5538 w
->force_start
= Qt
;
5541 Fgoto_char (w
->start
);
5543 lines
= displayed_window_lines (w
);
5546 this_scroll_margin
= max (0, scroll_margin
);
5547 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5551 XSETFASTINT (arg
, lines
/ 2);
5554 int iarg
= XINT (Fprefix_numeric_value (arg
));
5557 iarg
= iarg
+ lines
;
5559 #if 0 /* This code would prevent move-to-window-line from moving point
5560 to a place inside the scroll margins (which would cause the
5561 next redisplay to scroll). I wrote this code, but then concluded
5562 it is probably better not to install it. However, it is here
5563 inside #if 0 so as not to lose it. -- rms. */
5565 /* Don't let it get into the margin at either top or bottom. */
5566 iarg
= max (iarg
, this_scroll_margin
);
5567 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5570 arg
= make_number (iarg
);
5573 /* Skip past a partially visible first line. */
5575 XSETINT (arg
, XINT (arg
) + 1);
5577 return Fvertical_motion (arg
, window
);
5582 /***********************************************************************
5583 Window Configuration
5584 ***********************************************************************/
5586 struct save_window_data
5588 EMACS_INT size_from_Lisp_Vector_struct
;
5589 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5590 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5591 Lisp_Object frame_tool_bar_lines
;
5592 Lisp_Object selected_frame
;
5593 Lisp_Object current_window
;
5594 Lisp_Object current_buffer
;
5595 Lisp_Object minibuf_scroll_window
;
5596 Lisp_Object minibuf_selected_window
;
5597 Lisp_Object root_window
;
5598 Lisp_Object focus_frame
;
5599 /* Record the values of window-min-width and window-min-height
5600 so that window sizes remain consistent with them. */
5601 Lisp_Object min_width
, min_height
;
5602 /* A vector, each of whose elements is a struct saved_window
5604 Lisp_Object saved_windows
;
5607 /* This is saved as a Lisp_Vector */
5610 /* these first two must agree with struct Lisp_Vector in lisp.h */
5611 EMACS_INT size_from_Lisp_Vector_struct
;
5612 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5615 Lisp_Object buffer
, start
, pointm
, mark
;
5616 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5617 Lisp_Object hscroll
, min_hscroll
;
5618 Lisp_Object parent
, prev
;
5619 Lisp_Object start_at_line_beg
;
5620 Lisp_Object display_table
;
5621 Lisp_Object orig_top_line
, orig_total_lines
;
5622 Lisp_Object left_margin_cols
, right_margin_cols
;
5623 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5624 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
5627 #define SAVED_WINDOW_N(swv,n) \
5628 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5630 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5631 doc
: /* Return t if OBJECT is a window-configuration object. */)
5635 if (WINDOW_CONFIGURATIONP (object
))
5640 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5641 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5645 register struct save_window_data
*data
;
5646 struct Lisp_Vector
*saved_windows
;
5648 if (! WINDOW_CONFIGURATIONP (config
))
5649 wrong_type_argument (Qwindow_configuration_p
, config
);
5651 data
= (struct save_window_data
*) XVECTOR (config
);
5652 saved_windows
= XVECTOR (data
->saved_windows
);
5653 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5656 DEFUN ("set-window-configuration", Fset_window_configuration
,
5657 Sset_window_configuration
, 1, 1, 0,
5658 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5659 CONFIGURATION must be a value previously returned
5660 by `current-window-configuration' (which see).
5661 If CONFIGURATION was made from a frame that is now deleted,
5662 only frame-independent values can be restored. In this case,
5663 the return value is nil. Otherwise the value is t. */)
5665 Lisp_Object configuration
;
5667 register struct save_window_data
*data
;
5668 struct Lisp_Vector
*saved_windows
;
5669 Lisp_Object new_current_buffer
;
5674 while (!WINDOW_CONFIGURATIONP (configuration
))
5675 wrong_type_argument (Qwindow_configuration_p
, configuration
);
5677 data
= (struct save_window_data
*) XVECTOR (configuration
);
5678 saved_windows
= XVECTOR (data
->saved_windows
);
5680 new_current_buffer
= data
->current_buffer
;
5681 if (NILP (XBUFFER (new_current_buffer
)->name
))
5682 new_current_buffer
= Qnil
;
5685 if (XBUFFER (new_current_buffer
) == current_buffer
)
5688 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5689 point in new_current_buffer as of the last time this buffer was
5690 used. This can be non-deterministic since it can be changed by
5691 things like jit-lock by mere temporary selection of some random
5692 window that happens to show this buffer.
5693 So if possible we want this arbitrary choice of "which point" to
5694 be the one from the to-be-selected-window so as to prevent this
5695 window's cursor from being copied from another window. */
5696 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5697 /* If current_window = selected_window, its point is in BUF_PT. */
5698 && !EQ (selected_window
, data
->current_window
))
5699 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5701 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5704 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5707 /* If f is a dead frame, don't bother rebuilding its window tree.
5708 However, there is other stuff we should still try to do below. */
5709 if (FRAME_LIVE_P (f
))
5711 register struct window
*w
;
5712 register struct saved_window
*p
;
5713 struct window
*root_window
;
5714 struct window
**leaf_windows
;
5718 /* If the frame has been resized since this window configuration was
5719 made, we change the frame to the size specified in the
5720 configuration, restore the configuration, and then resize it
5721 back. We keep track of the prevailing height in these variables. */
5722 int previous_frame_lines
= FRAME_LINES (f
);
5723 int previous_frame_cols
= FRAME_COLS (f
);
5724 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5725 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5727 /* The mouse highlighting code could get screwed up
5728 if it runs during this. */
5731 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
5732 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
5733 change_frame_size (f
, XFASTINT (data
->frame_lines
),
5734 XFASTINT (data
->frame_cols
), 0, 0, 0);
5735 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5736 if (XFASTINT (data
->frame_menu_bar_lines
)
5737 != previous_frame_menu_bar_lines
)
5738 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
5739 #ifdef HAVE_WINDOW_SYSTEM
5740 if (XFASTINT (data
->frame_tool_bar_lines
)
5741 != previous_frame_tool_bar_lines
)
5742 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
5746 /* "Swap out" point from the selected window's buffer
5747 into the window itself. (Normally the pointm of the selected
5748 window holds garbage.) We do this now, before
5749 restoring the window contents, and prevent it from
5750 being done later on when we select a new window. */
5751 if (! NILP (XWINDOW (selected_window
)->buffer
))
5753 w
= XWINDOW (selected_window
);
5754 set_marker_both (w
->pointm
,
5756 BUF_PT (XBUFFER (w
->buffer
)),
5757 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5760 windows_or_buffers_changed
++;
5761 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
5763 /* Problem: Freeing all matrices and later allocating them again
5764 is a serious redisplay flickering problem. What we would
5765 really like to do is to free only those matrices not reused
5767 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5769 = (struct window
**) alloca (count_windows (root_window
)
5770 * sizeof (struct window
*));
5771 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
5773 /* Temporarily avoid any problems with windows that are smaller
5774 than they are supposed to be. */
5775 window_min_height
= 1;
5776 window_min_width
= 1;
5779 Mark all windows now on frame as "deleted".
5780 Restoring the new configuration "undeletes" any that are in it.
5782 Save their current buffers in their height fields, since we may
5783 need it later, if a buffer saved in the configuration is now
5785 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5787 for (k
= 0; k
< saved_windows
->size
; k
++)
5789 p
= SAVED_WINDOW_N (saved_windows
, k
);
5790 w
= XWINDOW (p
->window
);
5793 if (!NILP (p
->parent
))
5794 w
->parent
= SAVED_WINDOW_N (saved_windows
,
5795 XFASTINT (p
->parent
))->window
;
5799 if (!NILP (p
->prev
))
5801 w
->prev
= SAVED_WINDOW_N (saved_windows
,
5802 XFASTINT (p
->prev
))->window
;
5803 XWINDOW (w
->prev
)->next
= p
->window
;
5808 if (!NILP (w
->parent
))
5810 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
5812 XWINDOW (w
->parent
)->vchild
= p
->window
;
5813 XWINDOW (w
->parent
)->hchild
= Qnil
;
5817 XWINDOW (w
->parent
)->hchild
= p
->window
;
5818 XWINDOW (w
->parent
)->vchild
= Qnil
;
5823 /* If we squirreled away the buffer in the window's height,
5825 if (BUFFERP (w
->total_lines
))
5826 w
->buffer
= w
->total_lines
;
5827 w
->left_col
= p
->left_col
;
5828 w
->top_line
= p
->top_line
;
5829 w
->total_cols
= p
->total_cols
;
5830 w
->total_lines
= p
->total_lines
;
5831 w
->hscroll
= p
->hscroll
;
5832 w
->min_hscroll
= p
->min_hscroll
;
5833 w
->display_table
= p
->display_table
;
5834 w
->orig_top_line
= p
->orig_top_line
;
5835 w
->orig_total_lines
= p
->orig_total_lines
;
5836 w
->left_margin_cols
= p
->left_margin_cols
;
5837 w
->right_margin_cols
= p
->right_margin_cols
;
5838 w
->left_fringe_width
= p
->left_fringe_width
;
5839 w
->right_fringe_width
= p
->right_fringe_width
;
5840 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
5841 w
->scroll_bar_width
= p
->scroll_bar_width
;
5842 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
5843 XSETFASTINT (w
->last_modified
, 0);
5844 XSETFASTINT (w
->last_overlay_modified
, 0);
5846 /* Reinstall the saved buffer and pointers into it. */
5847 if (NILP (p
->buffer
))
5848 w
->buffer
= p
->buffer
;
5851 if (!NILP (XBUFFER (p
->buffer
)->name
))
5852 /* If saved buffer is alive, install it. */
5854 w
->buffer
= p
->buffer
;
5855 w
->start_at_line_beg
= p
->start_at_line_beg
;
5856 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
5857 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
5858 Fset_marker (XBUFFER (w
->buffer
)->mark
,
5859 p
->mark
, w
->buffer
);
5861 /* As documented in Fcurrent_window_configuration, don't
5862 restore the location of point in the buffer which was
5863 current when the window configuration was recorded. */
5864 if (!EQ (p
->buffer
, new_current_buffer
)
5865 && XBUFFER (p
->buffer
) == current_buffer
)
5866 Fgoto_char (w
->pointm
);
5868 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
5869 /* Else unless window has a live buffer, get one. */
5871 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
5872 /* This will set the markers to beginning of visible
5874 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5875 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
5876 w
->start_at_line_beg
= Qt
;
5879 /* Keeping window's old buffer; make sure the markers
5882 /* Set window markers at start of visible range. */
5883 if (XMARKER (w
->start
)->buffer
== 0)
5884 set_marker_restricted (w
->start
, make_number (0),
5886 if (XMARKER (w
->pointm
)->buffer
== 0)
5887 set_marker_restricted_both (w
->pointm
, w
->buffer
,
5888 BUF_PT (XBUFFER (w
->buffer
)),
5889 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5890 w
->start_at_line_beg
= Qt
;
5895 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
5896 /* Prevent "swapping out point" in the old selected window
5897 using the buffer that has been restored into it.
5898 We already swapped out point that from that window's old buffer. */
5899 selected_window
= Qnil
;
5901 /* Arrange *not* to restore point in the buffer that was
5902 current when the window configuration was saved. */
5903 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
5904 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
5905 make_number (old_point
),
5906 XWINDOW (data
->current_window
)->buffer
);
5908 Fselect_window (data
->current_window
, Qnil
);
5909 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
5912 if (NILP (data
->focus_frame
)
5913 || (FRAMEP (data
->focus_frame
)
5914 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5915 Fredirect_frame_focus (frame
, data
->focus_frame
);
5917 #if 0 /* I don't understand why this is needed, and it causes problems
5918 when the frame's old selected window has been deleted. */
5919 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5920 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5924 /* Set the screen height to the value it had before this function. */
5925 if (previous_frame_lines
!= FRAME_LINES (f
)
5926 || previous_frame_cols
!= FRAME_COLS (f
))
5927 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
5929 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5930 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5931 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5933 #ifdef HAVE_WINDOW_SYSTEM
5934 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5935 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5940 /* Now, free glyph matrices in windows that were not reused. */
5941 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5943 if (NILP (leaf_windows
[i
]->buffer
))
5945 /* Assert it's not reused as a combination. */
5946 xassert (NILP (leaf_windows
[i
]->hchild
)
5947 && NILP (leaf_windows
[i
]->vchild
));
5948 free_window_matrices (leaf_windows
[i
]);
5950 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5958 /* Fselect_window will have made f the selected frame, so we
5959 reselect the proper frame here. Fhandle_switch_frame will change the
5960 selected window too, but that doesn't make the call to
5961 Fselect_window above totally superfluous; it still sets f's
5963 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5964 do_switch_frame (data
->selected_frame
, 0, 0);
5966 if (! NILP (Vwindow_configuration_change_hook
)
5967 && ! NILP (Vrun_hooks
))
5968 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5971 if (!NILP (new_current_buffer
))
5972 Fset_buffer (new_current_buffer
);
5974 /* Restore the minimum heights recorded in the configuration. */
5975 window_min_height
= XINT (data
->min_height
);
5976 window_min_width
= XINT (data
->min_width
);
5978 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5979 minibuf_selected_window
= data
->minibuf_selected_window
;
5981 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5984 /* Mark all windows now on frame as deleted
5985 by setting their buffers to nil. */
5988 delete_all_subwindows (w
)
5989 register struct window
*w
;
5991 if (!NILP (w
->next
))
5992 delete_all_subwindows (XWINDOW (w
->next
));
5993 if (!NILP (w
->vchild
))
5994 delete_all_subwindows (XWINDOW (w
->vchild
));
5995 if (!NILP (w
->hchild
))
5996 delete_all_subwindows (XWINDOW (w
->hchild
));
5998 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6000 if (!NILP (w
->buffer
))
6003 /* We set all three of these fields to nil, to make sure that we can
6004 distinguish this dead window from any live window. Live leaf
6005 windows will have buffer set, and combination windows will have
6006 vchild or hchild set. */
6011 Vwindow_list
= Qnil
;
6015 count_windows (window
)
6016 register struct window
*window
;
6018 register int count
= 1;
6019 if (!NILP (window
->next
))
6020 count
+= count_windows (XWINDOW (window
->next
));
6021 if (!NILP (window
->vchild
))
6022 count
+= count_windows (XWINDOW (window
->vchild
));
6023 if (!NILP (window
->hchild
))
6024 count
+= count_windows (XWINDOW (window
->hchild
));
6029 /* Fill vector FLAT with leaf windows under W, starting at index I.
6030 Value is last index + 1. */
6033 get_leaf_windows (w
, flat
, i
)
6035 struct window
**flat
;
6040 if (!NILP (w
->hchild
))
6041 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6042 else if (!NILP (w
->vchild
))
6043 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6047 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6054 /* Return a pointer to the glyph W's physical cursor is on. Value is
6055 null if W's current matrix is invalid, so that no meaningfull glyph
6059 get_phys_cursor_glyph (w
)
6062 struct glyph_row
*row
;
6063 struct glyph
*glyph
;
6065 if (w
->phys_cursor
.vpos
>= 0
6066 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6067 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6069 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6070 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6079 save_window_save (window
, vector
, i
)
6081 struct Lisp_Vector
*vector
;
6084 register struct saved_window
*p
;
6085 register struct window
*w
;
6086 register Lisp_Object tem
;
6088 for (;!NILP (window
); window
= w
->next
)
6090 p
= SAVED_WINDOW_N (vector
, i
);
6091 w
= XWINDOW (window
);
6093 XSETFASTINT (w
->temslot
, i
); i
++;
6095 p
->buffer
= w
->buffer
;
6096 p
->left_col
= w
->left_col
;
6097 p
->top_line
= w
->top_line
;
6098 p
->total_cols
= w
->total_cols
;
6099 p
->total_lines
= w
->total_lines
;
6100 p
->hscroll
= w
->hscroll
;
6101 p
->min_hscroll
= w
->min_hscroll
;
6102 p
->display_table
= w
->display_table
;
6103 p
->orig_top_line
= w
->orig_top_line
;
6104 p
->orig_total_lines
= w
->orig_total_lines
;
6105 p
->left_margin_cols
= w
->left_margin_cols
;
6106 p
->right_margin_cols
= w
->right_margin_cols
;
6107 p
->left_fringe_width
= w
->left_fringe_width
;
6108 p
->right_fringe_width
= w
->right_fringe_width
;
6109 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6110 p
->scroll_bar_width
= w
->scroll_bar_width
;
6111 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6112 if (!NILP (w
->buffer
))
6114 /* Save w's value of point in the window configuration.
6115 If w is the selected window, then get the value of point
6116 from the buffer; pointm is garbage in the selected window. */
6117 if (EQ (window
, selected_window
))
6119 p
->pointm
= Fmake_marker ();
6120 set_marker_both (p
->pointm
, w
->buffer
,
6121 BUF_PT (XBUFFER (w
->buffer
)),
6122 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6125 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6127 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6128 p
->start_at_line_beg
= w
->start_at_line_beg
;
6130 tem
= XBUFFER (w
->buffer
)->mark
;
6131 p
->mark
= Fcopy_marker (tem
, Qnil
);
6138 p
->start_at_line_beg
= Qnil
;
6141 if (NILP (w
->parent
))
6144 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6149 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6151 if (!NILP (w
->vchild
))
6152 i
= save_window_save (w
->vchild
, vector
, i
);
6153 if (!NILP (w
->hchild
))
6154 i
= save_window_save (w
->hchild
, vector
, i
);
6160 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6161 Scurrent_window_configuration
, 0, 1, 0,
6162 doc
: /* Return an object representing the current window configuration of FRAME.
6163 If FRAME is nil or omitted, use the selected frame.
6164 This describes the number of windows, their sizes and current buffers,
6165 and for each displayed buffer, where display starts, and the positions of
6166 point and mark. An exception is made for point in the current buffer:
6167 its value is -not- saved.
6168 This also records the currently selected frame, and FRAME's focus
6169 redirection (see `redirect-frame-focus'). */)
6173 register Lisp_Object tem
;
6174 register int n_windows
;
6175 register struct save_window_data
*data
;
6176 register struct Lisp_Vector
*vec
;
6181 frame
= selected_frame
;
6182 CHECK_LIVE_FRAME (frame
);
6185 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6186 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6187 data
= (struct save_window_data
*)vec
;
6189 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6190 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6191 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6192 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6193 data
->selected_frame
= selected_frame
;
6194 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6195 XSETBUFFER (data
->current_buffer
, current_buffer
);
6196 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6197 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6198 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6199 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6200 XSETINT (data
->min_height
, window_min_height
);
6201 XSETINT (data
->min_width
, window_min_width
);
6202 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6203 data
->saved_windows
= tem
;
6204 for (i
= 0; i
< n_windows
; i
++)
6205 XVECTOR (tem
)->contents
[i
]
6206 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6207 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6208 XSETWINDOW_CONFIGURATION (tem
, data
);
6212 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6214 doc
: /* Execute BODY, preserving window sizes and contents.
6215 Return the value of the last form in BODY.
6216 Restore which buffer appears in which window, where display starts,
6217 and the value of point and mark for each window.
6218 Also restore the choice of selected window.
6219 Also restore which buffer is current.
6220 Does not restore the value of point in current buffer.
6221 usage: (save-window-excursion BODY ...) */)
6225 register Lisp_Object val
;
6226 register int count
= SPECPDL_INDEX ();
6228 record_unwind_protect (Fset_window_configuration
,
6229 Fcurrent_window_configuration (Qnil
));
6230 val
= Fprogn (args
);
6231 return unbind_to (count
, val
);
6236 /***********************************************************************
6238 ***********************************************************************/
6244 Lisp_Object tail
= Qnil
;
6245 Lisp_Object result
= Qnil
;
6252 if (!NILP (w
->hchild
))
6253 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6254 window_tree (XWINDOW (w
->hchild
))));
6255 else if (!NILP (w
->vchild
))
6256 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6257 window_tree (XWINDOW (w
->vchild
))));
6261 result
= tail
= Fcons (wn
, Qnil
);
6265 XSETCDR (tail
, Fcons (wn
, Qnil
));
6269 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6277 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6279 doc
: /* Return the window tree for frame FRAME.
6281 The return value is a list of the form (ROOT MINI), where ROOT
6282 represents the window tree of the frame's root window, and MINI
6283 is the frame's minibuffer window.
6285 If the root window is not split, ROOT is the root window itself.
6286 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6287 horizontal split, and t for a vertical split, EDGES gives the combined
6288 size and position of the subwindows in the split, and the rest of the
6289 elements are the subwindows in the split. Each of the subwindows may
6290 again be a window or a list representing a window split, and so on.
6291 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6293 If FRAME is nil or omitted, return information on the currently
6302 frame
= selected_frame
;
6304 CHECK_FRAME (frame
);
6307 if (!FRAME_LIVE_P (f
))
6310 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6314 /***********************************************************************
6316 ***********************************************************************/
6318 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6320 doc
: /* Set width of marginal areas of window WINDOW.
6321 If WINDOW is nil, set margins of the currently selected window.
6322 Second arg LEFT-WIDTH specifies the number of character cells to
6323 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6324 does the same for the right marginal area. A nil width parameter
6325 means no margin. */)
6326 (window
, left_width
, right_width
)
6327 Lisp_Object window
, left_width
, right_width
;
6329 struct window
*w
= decode_window (window
);
6331 /* Translate negative or zero widths to nil.
6332 Margins that are too wide have to be checked elsewhere. */
6334 if (!NILP (left_width
))
6336 CHECK_NUMBER (left_width
);
6337 if (XINT (left_width
) <= 0)
6341 if (!NILP (right_width
))
6343 CHECK_NUMBER (right_width
);
6344 if (XINT (right_width
) <= 0)
6348 if (!EQ (w
->left_margin_cols
, left_width
)
6349 || !EQ (w
->right_margin_cols
, right_width
))
6351 w
->left_margin_cols
= left_width
;
6352 w
->right_margin_cols
= right_width
;
6354 adjust_window_margins (w
);
6356 ++windows_or_buffers_changed
;
6357 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6364 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6366 doc
: /* Get width of marginal areas of window WINDOW.
6367 If WINDOW is omitted or nil, use the currently selected window.
6368 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6369 If a marginal area does not exist, its width will be returned
6374 struct window
*w
= decode_window (window
);
6375 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6380 /***********************************************************************
6382 ***********************************************************************/
6384 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6386 doc
: /* Set the fringe widths of window WINDOW.
6387 If WINDOW is nil, set the fringe widths of the currently selected
6389 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6390 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6391 fringe width. If a fringe width arg is nil, that means to use the
6392 frame's default fringe width. Default fringe widths can be set with
6393 the command `set-fringe-style'.
6394 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6395 outside of the display margins. By default, fringes are drawn between
6396 display marginal areas and the text area. */)
6397 (window
, left_width
, right_width
, outside_margins
)
6398 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6400 struct window
*w
= decode_window (window
);
6402 if (!NILP (left_width
))
6403 CHECK_NATNUM (left_width
);
6404 if (!NILP (right_width
))
6405 CHECK_NATNUM (right_width
);
6407 if (!EQ (w
->left_fringe_width
, left_width
)
6408 || !EQ (w
->right_fringe_width
, right_width
)
6409 || !EQ (w
->fringes_outside_margins
, outside_margins
))
6411 w
->left_fringe_width
= left_width
;
6412 w
->right_fringe_width
= right_width
;
6413 w
->fringes_outside_margins
= outside_margins
;
6415 adjust_window_margins (w
);
6417 clear_glyph_matrix (w
->current_matrix
);
6418 w
->window_end_valid
= Qnil
;
6420 ++windows_or_buffers_changed
;
6421 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6428 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6430 doc
: /* Get width of fringes of window WINDOW.
6431 If WINDOW is omitted or nil, use the currently selected window.
6432 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6436 struct window
*w
= decode_window (window
);
6437 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6438 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6439 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
) ?
6440 Qt
: Qnil
), Qnil
)));
6445 /***********************************************************************
6447 ***********************************************************************/
6449 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6451 doc
: /* Set width and type of scroll bars of window WINDOW.
6452 If window is nil, set scroll bars of the currently selected window.
6453 Second parameter WIDTH specifies the pixel width for the scroll bar;
6454 this is automatically adjusted to a multiple of the frame column width.
6455 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6456 bar: left, right, or nil.
6457 If WIDTH is nil, use the frame's scroll-bar width.
6458 If TYPE is t, use the frame's scroll-bar type. */)
6459 (window
, width
, vertical_type
, horizontal_type
)
6460 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6462 struct window
*w
= decode_window (window
);
6466 CHECK_NATNUM (width
);
6468 if (XINT (width
) == 0)
6469 vertical_type
= Qnil
;
6472 if (!(EQ (vertical_type
, Qnil
)
6473 || EQ (vertical_type
, Qleft
)
6474 || EQ (vertical_type
, Qright
)
6475 || EQ (vertical_type
, Qt
)))
6476 error ("Invalid type of vertical scroll bar");
6478 if (!EQ (w
->scroll_bar_width
, width
)
6479 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6481 w
->scroll_bar_width
= width
;
6482 w
->vertical_scroll_bar_type
= vertical_type
;
6484 adjust_window_margins (w
);
6486 clear_glyph_matrix (w
->current_matrix
);
6487 w
->window_end_valid
= Qnil
;
6489 ++windows_or_buffers_changed
;
6490 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6497 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6499 doc
: /* Get width and type of scroll bars of window WINDOW.
6500 If WINDOW is omitted or nil, use the currently selected window.
6501 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6502 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6507 struct window
*w
= decode_window (window
);
6508 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6509 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6510 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6511 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6512 Fcons (w
->vertical_scroll_bar_type
,
6513 Fcons (Qnil
, Qnil
))));
6518 /***********************************************************************
6520 ***********************************************************************/
6522 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6523 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6524 Use the selected window if WINDOW is nil or omitted.
6525 Normally, value is a multiple of the canonical character height of WINDOW;
6526 optional second arg PIXELS_P means value is measured in pixels. */)
6528 Lisp_Object window
, pixels_p
;
6535 window
= selected_window
;
6537 CHECK_WINDOW (window
);
6538 w
= XWINDOW (window
);
6539 f
= XFRAME (w
->frame
);
6541 if (FRAME_WINDOW_P (f
))
6542 result
= (NILP (pixels_p
)
6543 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6544 : make_number (-w
->vscroll
));
6546 result
= make_number (0);
6551 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6553 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6554 WINDOW nil means use the selected window. Normally, VSCROLL is a
6555 non-negative multiple of the canonical character height of WINDOW;
6556 optional third arg PIXELS_P non-nil means that VSCROLL is in pixels.
6557 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6558 corresponds to an integral number of pixels. The return value is the
6559 result of this rounding.
6560 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6561 (window
, vscroll
, pixels_p
)
6562 Lisp_Object window
, vscroll
, pixels_p
;
6568 window
= selected_window
;
6570 CHECK_WINDOW (window
);
6571 CHECK_NUMBER_OR_FLOAT (vscroll
);
6573 w
= XWINDOW (window
);
6574 f
= XFRAME (w
->frame
);
6576 if (FRAME_WINDOW_P (f
))
6578 int old_dy
= w
->vscroll
;
6580 w
->vscroll
= - (NILP (pixels_p
)
6581 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6582 : XFLOATINT (vscroll
));
6583 w
->vscroll
= min (w
->vscroll
, 0);
6585 if (w
->vscroll
!= old_dy
)
6587 /* Adjust glyph matrix of the frame if the virtual display
6588 area becomes larger than before. */
6589 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6592 /* Prevent redisplay shortcuts. */
6593 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6597 return Fwindow_vscroll (window
, pixels_p
);
6601 /* Call FN for all leaf windows on frame F. FN is called with the
6602 first argument being a pointer to the leaf window, and with
6603 additional argument USER_DATA. Stops when FN returns 0. */
6606 foreach_window (f
, fn
, user_data
)
6608 int (* fn
) P_ ((struct window
*, void *));
6611 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6615 /* Helper function for foreach_window. Call FN for all leaf windows
6616 reachable from W. FN is called with the first argument being a
6617 pointer to the leaf window, and with additional argument USER_DATA.
6618 Stop when FN returns 0. Value is 0 if stopped by FN. */
6621 foreach_window_1 (w
, fn
, user_data
)
6623 int (* fn
) P_ ((struct window
*, void *));
6628 for (cont
= 1; w
&& cont
;)
6630 if (!NILP (w
->hchild
))
6631 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6632 else if (!NILP (w
->vchild
))
6633 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6635 cont
= fn (w
, user_data
);
6637 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6644 /* Freeze or unfreeze the window start of W unless it is a
6645 mini-window or the selected window. FREEZE_P non-null means freeze
6646 the window start. */
6649 freeze_window_start (w
, freeze_p
)
6653 if (w
== XWINDOW (selected_window
)
6654 || MINI_WINDOW_P (w
)
6655 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6656 && ! NILP (Vminibuf_scroll_window
)
6657 && w
== XWINDOW (Vminibuf_scroll_window
)))
6660 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6665 /* Freeze or unfreeze the window starts of all leaf windows on frame
6666 F, except the selected window and a mini-window. FREEZE_P non-zero
6667 means freeze the window start. */
6670 freeze_window_starts (f
, freeze_p
)
6674 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6678 /***********************************************************************
6680 ***********************************************************************/
6682 /* Return 1 if window configurations C1 and C2
6683 describe the same state of affairs. This is used by Fequal. */
6686 compare_window_configurations (c1
, c2
, ignore_positions
)
6688 int ignore_positions
;
6690 register struct save_window_data
*d1
, *d2
;
6691 struct Lisp_Vector
*sw1
, *sw2
;
6694 if (!WINDOW_CONFIGURATIONP (c1
))
6695 wrong_type_argument (Qwindow_configuration_p
, c1
);
6696 if (!WINDOW_CONFIGURATIONP (c2
))
6697 wrong_type_argument (Qwindow_configuration_p
, c2
);
6699 d1
= (struct save_window_data
*) XVECTOR (c1
);
6700 d2
= (struct save_window_data
*) XVECTOR (c2
);
6701 sw1
= XVECTOR (d1
->saved_windows
);
6702 sw2
= XVECTOR (d2
->saved_windows
);
6704 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
6706 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
6708 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
6710 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
6712 /* Don't compare the current_window field directly.
6713 Instead see w1_is_current and w2_is_current, below. */
6714 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
6716 if (! ignore_positions
)
6718 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
6720 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
6723 /* Don't compare the root_window field.
6724 We don't require the two configurations
6725 to use the same window object,
6726 and the two root windows must be equivalent
6727 if everything else compares equal. */
6728 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
6730 if (! EQ (d1
->min_width
, d2
->min_width
))
6732 if (! EQ (d1
->min_height
, d2
->min_height
))
6735 /* Verify that the two confis have the same number of windows. */
6736 if (sw1
->size
!= sw2
->size
)
6739 for (i
= 0; i
< sw1
->size
; i
++)
6741 struct saved_window
*p1
, *p2
;
6742 int w1_is_current
, w2_is_current
;
6744 p1
= SAVED_WINDOW_N (sw1
, i
);
6745 p2
= SAVED_WINDOW_N (sw2
, i
);
6747 /* Verify that the current windows in the two
6748 configurations correspond to each other. */
6749 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
6750 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
6752 if (w1_is_current
!= w2_is_current
)
6755 /* Verify that the corresponding windows do match. */
6756 if (! EQ (p1
->buffer
, p2
->buffer
))
6758 if (! EQ (p1
->left_col
, p2
->left_col
))
6760 if (! EQ (p1
->top_line
, p2
->top_line
))
6762 if (! EQ (p1
->total_cols
, p2
->total_cols
))
6764 if (! EQ (p1
->total_lines
, p2
->total_lines
))
6766 if (! EQ (p1
->display_table
, p2
->display_table
))
6768 if (! EQ (p1
->parent
, p2
->parent
))
6770 if (! EQ (p1
->prev
, p2
->prev
))
6772 if (! ignore_positions
)
6774 if (! EQ (p1
->hscroll
, p2
->hscroll
))
6776 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
6778 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
6780 if (NILP (Fequal (p1
->start
, p2
->start
)))
6782 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
6784 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
6787 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
6789 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
6791 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
6793 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
6795 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
6797 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
6799 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
6806 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6807 Scompare_window_configurations
, 2, 2, 0,
6808 doc
: /* Compare two window configurations as regards the structure of windows.
6809 This function ignores details such as the values of point and mark
6810 and scrolling positions. */)
6814 if (compare_window_configurations (x
, y
, 1))
6822 struct frame
*f
= make_initial_frame ();
6823 XSETFRAME (selected_frame
, f
);
6824 Vterminal_frame
= selected_frame
;
6825 minibuf_window
= f
->minibuffer_window
;
6826 selected_window
= f
->selected_window
;
6827 last_nonminibuf_frame
= f
;
6829 window_initialized
= 1;
6835 Vwindow_list
= Qnil
;
6841 Qwindow_size_fixed
= intern ("window-size-fixed");
6842 staticpro (&Qwindow_size_fixed
);
6843 Fset (Qwindow_size_fixed
, Qnil
);
6845 staticpro (&Qwindow_configuration_change_hook
);
6846 Qwindow_configuration_change_hook
6847 = intern ("window-configuration-change-hook");
6849 Qwindowp
= intern ("windowp");
6850 staticpro (&Qwindowp
);
6852 Qwindow_configuration_p
= intern ("window-configuration-p");
6853 staticpro (&Qwindow_configuration_p
);
6855 Qwindow_live_p
= intern ("window-live-p");
6856 staticpro (&Qwindow_live_p
);
6858 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
6859 staticpro (&Qtemp_buffer_show_hook
);
6861 staticpro (&Vwindow_list
);
6863 minibuf_selected_window
= Qnil
;
6864 staticpro (&minibuf_selected_window
);
6866 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
6867 doc
: /* Non-nil means call as function to display a help buffer.
6868 The function is called with one argument, the buffer to be displayed.
6869 Used by `with-output-to-temp-buffer'.
6870 If this function is used, then it must do the entire job of showing
6871 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
6872 Vtemp_buffer_show_function
= Qnil
;
6874 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
6875 doc
: /* If non-nil, function to call to handle `display-buffer'.
6876 It will receive two args, the buffer and a flag which if non-nil means
6877 that the currently selected window is not acceptable.
6878 It should choose or create a window, display the specified buffer in it,
6879 and return the window.
6880 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
6881 work using this function. */);
6882 Vdisplay_buffer_function
= Qnil
;
6884 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
6885 doc
: /* *If non-nil, `display-buffer' should even the window heights.
6886 If nil, `display-buffer' will leave the window configuration alone. */);
6887 Veven_window_heights
= Qt
;
6889 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
6890 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
6891 Vminibuf_scroll_window
= Qnil
;
6893 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
6894 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
6895 If the minibuffer is active, the `minibuffer-scroll-window' mode line
6896 is displayed in the `mode-line' face. */);
6897 mode_line_in_non_selected_windows
= 1;
6899 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
6900 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
6901 Vother_window_scroll_buffer
= Qnil
;
6903 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
6904 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
6907 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
6908 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
6909 auto_window_vscroll_p
= 1;
6911 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
6912 doc
: /* *Non-nil means `display-buffer' should reuse frames.
6913 If the buffer in question is already displayed in a frame, raise that frame. */);
6914 display_buffer_reuse_frames
= 0;
6916 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
6917 doc
: /* Function to call to handle automatic new frame creation.
6918 It is called with no arguments and should return a newly created frame.
6920 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
6921 where `pop-up-frame-alist' would hold the default frame parameters. */);
6922 Vpop_up_frame_function
= Qnil
;
6924 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
6925 doc
: /* *List of buffer names that should have their own special frames.
6926 Displaying a buffer with `display-buffer' or `pop-to-buffer',
6927 if its name is in this list, makes a special frame for it
6928 using `special-display-function'. See also `special-display-regexps'.
6930 An element of the list can be a list instead of just a string.
6931 There are two ways to use a list as an element:
6932 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
6933 In the first case, the FRAME-PARAMETERS are pairs of the form
6934 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6935 In the second case, FUNCTION is called with BUFFER as the first argument,
6936 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
6937 All this is done by the function found in `special-display-function'.
6939 If the specified frame parameters include (same-buffer . t), the
6940 buffer is displayed in the currently selected window. Otherwise, if
6941 they include (same-frame . t), the buffer is displayed in a new window
6942 in the currently selected frame.
6944 If this variable appears \"not to work\", because you add a name to it
6945 but that buffer still appears in the selected window, look at the
6946 values of `same-window-buffer-names' and `same-window-regexps'.
6947 Those variables take precedence over this one. */);
6948 Vspecial_display_buffer_names
= Qnil
;
6950 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
6951 doc
: /* *List of regexps saying which buffers should have their own special frames.
6952 When displaying a buffer with `display-buffer' or `pop-to-buffer',
6953 if any regexp in this list matches the buffer name, it makes a
6954 special frame for the buffer by calling `special-display-function'.
6956 An element of the list can be a list instead of just a string.
6957 There are two ways to use a list as an element:
6958 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
6959 In the first case, the FRAME-PARAMETERS are pairs of the form
6960 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6961 In the second case, FUNCTION is called with BUFFER as the first argument,
6962 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
6963 All this is done by the function found in `special-display-function'.
6965 If the specified frame parameters include (same-buffer . t), the
6966 buffer is displayed in the currently selected window. Otherwise, if
6967 they include (same-frame . t), the buffer is displayed in a new window
6968 in the currently selected frame.
6970 If this variable appears \"not to work\", because you add a regexp to it
6971 but the matching buffers still appear in the selected window, look at the
6972 values of `same-window-buffer-names' and `same-window-regexps'.
6973 Those variables take precedence over this one. */);
6974 Vspecial_display_regexps
= Qnil
;
6976 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
6977 doc
: /* Function to call to make a new frame for a special buffer.
6978 It is called with two arguments, the buffer and optional buffer specific
6979 data, and should return a window displaying that buffer.
6980 The default value normally makes a separate frame for the buffer,
6981 using `special-display-frame-alist' to specify the frame parameters.
6982 But if the buffer specific data includes (same-buffer . t) then the
6983 buffer is displayed in the current selected window.
6984 Otherwise if it includes (same-frame . t) then the buffer is displayed in
6985 a new window in the currently selected frame.
6987 A buffer is special if it is listed in `special-display-buffer-names'
6988 or matches a regexp in `special-display-regexps'. */);
6989 Vspecial_display_function
= Qnil
;
6991 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
6992 doc
: /* *List of buffer names that should appear in the selected window.
6993 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
6994 switches to it in the selected window, rather than making it appear
6995 in some other window.
6997 An element of the list can be a cons cell instead of just a string.
6998 Then the car must be a string, which specifies the buffer name.
6999 This is for compatibility with `special-display-buffer-names';
7000 the cdr of the cons cell is ignored.
7002 See also `same-window-regexps'. */);
7003 Vsame_window_buffer_names
= Qnil
;
7005 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
7006 doc
: /* *List of regexps saying which buffers should appear in the selected window.
7007 If a buffer name matches one of these regexps, then displaying it
7008 using `display-buffer' or `pop-to-buffer' switches to it
7009 in the selected window, rather than making it appear in some other window.
7011 An element of the list can be a cons cell instead of just a string.
7012 Then the car must be a string, which specifies the buffer name.
7013 This is for compatibility with `special-display-buffer-names';
7014 the cdr of the cons cell is ignored.
7016 See also `same-window-buffer-names'. */);
7017 Vsame_window_regexps
= Qnil
;
7019 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
7020 doc
: /* *Non-nil means display-buffer should make new windows. */);
7023 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
7024 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7025 next_screen_context_lines
= 2;
7027 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
7028 doc
: /* *A window must be at least this tall to be eligible for splitting by `display-buffer'.
7029 If there is only one window, it is split regardless of this value. */);
7030 split_height_threshold
= 500;
7032 DEFVAR_INT ("window-min-height", &window_min_height
,
7033 doc
: /* *Delete any window less than this tall (including its mode line). */);
7034 window_min_height
= 4;
7036 DEFVAR_INT ("window-min-width", &window_min_width
,
7037 doc
: /* *Delete any window less than this wide. */);
7038 window_min_width
= 10;
7040 DEFVAR_LISP ("scroll-preserve-screen-position",
7041 &Vscroll_preserve_screen_position
,
7042 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
7043 A value of nil means point does not keep its screen position except
7044 at the scroll margin or window boundary respectively.
7045 A value of t means point keeps its screen position if the scroll
7046 command moved it vertically out of the window, e.g. when scrolling
7048 Any other value means point always keeps its screen position. */);
7049 Vscroll_preserve_screen_position
= Qnil
;
7051 DEFVAR_LISP ("window-configuration-change-hook",
7052 &Vwindow_configuration_change_hook
,
7053 doc
: /* Functions to call when window configuration changes.
7054 The selected frame is the one whose configuration has changed. */);
7055 Vwindow_configuration_change_hook
= Qnil
;
7057 defsubr (&Sselected_window
);
7058 defsubr (&Sminibuffer_window
);
7059 defsubr (&Swindow_minibuffer_p
);
7060 defsubr (&Swindowp
);
7061 defsubr (&Swindow_live_p
);
7062 defsubr (&Spos_visible_in_window_p
);
7063 defsubr (&Swindow_buffer
);
7064 defsubr (&Swindow_height
);
7065 defsubr (&Swindow_width
);
7066 defsubr (&Swindow_hscroll
);
7067 defsubr (&Sset_window_hscroll
);
7068 defsubr (&Swindow_redisplay_end_trigger
);
7069 defsubr (&Sset_window_redisplay_end_trigger
);
7070 defsubr (&Swindow_edges
);
7071 defsubr (&Swindow_pixel_edges
);
7072 defsubr (&Swindow_inside_edges
);
7073 defsubr (&Swindow_inside_pixel_edges
);
7074 defsubr (&Scoordinates_in_window_p
);
7075 defsubr (&Swindow_at
);
7076 defsubr (&Swindow_point
);
7077 defsubr (&Swindow_start
);
7078 defsubr (&Swindow_end
);
7079 defsubr (&Sset_window_point
);
7080 defsubr (&Sset_window_start
);
7081 defsubr (&Swindow_dedicated_p
);
7082 defsubr (&Sset_window_dedicated_p
);
7083 defsubr (&Swindow_display_table
);
7084 defsubr (&Sset_window_display_table
);
7085 defsubr (&Snext_window
);
7086 defsubr (&Sprevious_window
);
7087 defsubr (&Sother_window
);
7088 defsubr (&Sget_lru_window
);
7089 defsubr (&Sget_largest_window
);
7090 defsubr (&Sget_buffer_window
);
7091 defsubr (&Sdelete_other_windows
);
7092 defsubr (&Sdelete_windows_on
);
7093 defsubr (&Sreplace_buffer_in_windows
);
7094 defsubr (&Sdelete_window
);
7095 defsubr (&Sset_window_buffer
);
7096 defsubr (&Sselect_window
);
7097 defsubr (&Sspecial_display_p
);
7098 defsubr (&Ssame_window_p
);
7099 defsubr (&Sdisplay_buffer
);
7100 defsubr (&Sforce_window_update
);
7101 defsubr (&Ssplit_window
);
7102 defsubr (&Senlarge_window
);
7103 defsubr (&Sshrink_window
);
7104 defsubr (&Sscroll_up
);
7105 defsubr (&Sscroll_down
);
7106 defsubr (&Sscroll_left
);
7107 defsubr (&Sscroll_right
);
7108 defsubr (&Sother_window_for_scrolling
);
7109 defsubr (&Sscroll_other_window
);
7110 defsubr (&Sminibuffer_selected_window
);
7111 defsubr (&Srecenter
);
7112 defsubr (&Swindow_text_height
);
7113 defsubr (&Smove_to_window_line
);
7114 defsubr (&Swindow_configuration_p
);
7115 defsubr (&Swindow_configuration_frame
);
7116 defsubr (&Sset_window_configuration
);
7117 defsubr (&Scurrent_window_configuration
);
7118 defsubr (&Ssave_window_excursion
);
7119 defsubr (&Swindow_tree
);
7120 defsubr (&Sset_window_margins
);
7121 defsubr (&Swindow_margins
);
7122 defsubr (&Sset_window_fringes
);
7123 defsubr (&Swindow_fringes
);
7124 defsubr (&Sset_window_scroll_bars
);
7125 defsubr (&Swindow_scroll_bars
);
7126 defsubr (&Swindow_vscroll
);
7127 defsubr (&Sset_window_vscroll
);
7128 defsubr (&Scompare_window_configurations
);
7129 defsubr (&Swindow_list
);
7135 initial_define_key (control_x_map
, '1', "delete-other-windows");
7136 initial_define_key (control_x_map
, '2', "split-window");
7137 initial_define_key (control_x_map
, '0', "delete-window");
7138 initial_define_key (control_x_map
, 'o', "other-window");
7139 initial_define_key (control_x_map
, '^', "enlarge-window");
7140 initial_define_key (control_x_map
, '<', "scroll-left");
7141 initial_define_key (control_x_map
, '>', "scroll-right");
7143 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7144 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7145 initial_define_key (meta_map
, 'v', "scroll-down");
7147 initial_define_key (global_map
, Ctl('L'), "recenter");
7148 initial_define_key (meta_map
, 'r', "move-to-window-line");
7151 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7152 (do not change this comment) */